Title of Invention	AN IMPROVED HARMONIUM
Abstract	An improved harmonium having an outer box housing interalia bellows, an airbag, atleast two sets of reeds each set having atleast 12 reeds, a set of atleast 12 keys, each key corresponding to a reed on each set of reeds, wherein under each key are provided atleast two reeds of different frequencies and an individual stopper for each key allowing the passage of air selectively through either of the aforesaid reeds tuned to different frequencies under the same key.

Title of Invention

AN IMPROVED HARMONIUM

Abstract

An improved harmonium having an outer box housing interalia bellows, an airbag, atleast two sets of reeds each set having atleast 12 reeds, a set of atleast 12 keys, each key corresponding to a reed on each set of reeds, wherein under each key are provided atleast two reeds of different frequencies and an individual stopper for each key allowing the passage of air selectively through either of the aforesaid reeds tuned to different frequencies under the same key.

Full Text	FORM 2 THE PATENTS ACT, 1970 (39 OF 1970) & THE PATENT RULES, 2003 COMPLETE SPECIFICATION [SECTION 10; RULE 13] "AN IMPROVED HARMONIUM DR. VIDYADHAR GOPAL OKE, 54A/32, VRINDAVAN, THANE (WEST), 400601, MAHARASHTRA STATE, INDIA THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES AND ASCERTAINS THE NATURE OF THIS INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED : 2 FIELD OF INVENTION: The present invention relates to an improved harmonium. BACKGROUND OF INVENTION: Existing or traditional harmonium consists of a wooden box housing interalia bellows, a set of one to four reedboards, stoppers for each reed board to control passage of air moving from the airbag to the reedboard and then to the keyboard. The reedboard comprises of several adjacent reeds. A single reedboard produces a weaker sound and hence two or more reedboards are simultaneously played to produce sound of sufficiently high volume. A reed is made up of two parts namely, the body of the reed and the tongue of the reed that is a thin metal plate and fitted over the body of the reed, such that the air is blown from the airbag with the help of bellows facilitates the vibration of the tongue of the reed, producing a sound or a musical note. The quality of sound or musical note produced by a reed depends on its frequency. Frequency in turn depends on the metal, shape, size and the thickness of the tongue of each reed. Every reed on different reedboards corresponding to a single key on keyboard is tuned to the same frequency, because otherwise, when more than one reedboard is used to produce the sound, it will produce a dissonant sound due to different frequencies of reeds. There are 12 musical notes corresponding to 12 keys in an octave and a harmonium may consist of more than 12 keys. The reeds in the traditional harmonium are tuned to specific musical notes as per the 12-Tone European Equitempered scale. Each reed is connected with the key which when pressed and braught into playing position, allows the air from the airbag to flow through the said reed, thereby facilitating the vibration of the tongue of the said reed, 3 producing a sound that is equivalent to the frequency to which the said reed is tuned. Thus in this way, within an octave only 12 musical notes of 12 different frequencies are obtained in the traditional harmonium, thereby giving no further scope for selection of musical notes beyond the said 12 musical notes. The following Table 1 shows the % increase of the frequencies of the 12 musical notes as per the 12-tone European Equitempered scale from the Base musical note in a reedboard in the traditional harmonium. The Base musical note (shown as No.l in the following table) can be tuned on reed/s under any of the 12 keys. Key Note Tuned on % Increase from No. No. Reed Nos. Base musical note 1 1 1A,1B,1C,1D 00.00 (Base musical note} 2 2 2A,26,20,20 05.95 3 3 3A,3B,3C, 3D 12.25 4 4 4A,4B,4C, 4D 18. 92 5 5 5A,5B,5C,5D 26.00 6 6 6A, 6B,6C,6D 33.48 7 7 7A, 7B,7C,7D 41.42 8 8 8A, 8B,8C,8D 49.83 9 9 9A, 9B,9C,9D 58.74 10 10 10A,10B,10C,10D 68.18 11 11 11A,11B,11C,11D 78.18 12 12 12A,12B,12C,12D 88.77 The harmonium in the prior art is played as follows (Fig 2). When the bellows (13) are released, the air from outside enters the bellows through opening 24. 4 When the bellows are pressed, the valve for the bellows (34) prevents the air in the bellows to leak to outside by closing the opening 24, and thereby pushing the air to the wooden box thro' opening 25. Thereafter the air enters the wooden box thro' opening 25. This air enters the airbag (14) through opening 26 and is then compressed due to the spring (23) in the airbag and sent back through opening 26 and further sent through openings 27 and 28 to reedboards A and B respectively. On pressing the Key (1) and bringing it into playing position (Fig 2), the air passes through the reeds making a sound, and thereafter, leaves the harmonium through openings 29 and 30. The stopper for reedboard (22) is used to control the passage of air through openings 27 and 28. After the sound is produced, the Key (1) is returned to non-playing position (Fig 1). The drawbacks of the traditional Harmonium are as follows: 1) Only 12 musical notes can be played in an octave. 2) The above 12 notes belong to the European 12-tone Equitempered scale 3) If reeds on different reedboards corresponding to the same key on the keyboard are tuned to different frequencies then either one cannot simultaneously play two or more reedboards (as it may produce dissonant sound) or if two or more reedboards are not simultaneously used to play the sound, then the resultant sound would be weaker. OBJECT OF THE PRESENT INVENTION: The present invention proposes a harmonium which would obviate the aforesaid drawbacks by providing a wide (more than 12) range of musical notes with a facility to select the desired notes. Except the 1st note i.e., the Base musical note which can be same in both the European and the Indian scales, these additional notes belong to the proposed Indian scale and are therefore different than the musical notes of European 12-Tone Equitempered scale available in the 5 traditional harmonium and it would yet produce consonant sound of sufficient volume. DESCRIPTION OF THE PRESENT INVENTION: According to this invention an improved harmonium has an outer box housing interalia bellows, an airbag, atleast two sets of reeds each set having atleast 12 reeds, a set of atleast 12 keys, each key corresponding to a reed on each set of reeds, wherein under each key are provided atleast two reeds of different frequencies and a stopper for each key allowing the passage of air selectively through either of the aforesaid reeds tuned to different frequencies under the same key. The invention will now be described and explained with the help of drawings accompanying this specification. The said drawings and the description only illustrates the invention and in no way limit the same. In the figures drawn in the drawings, same numerals are used to denote the same parts. Fig. 1 shows a sectional side view of the harmonium in the prior art. Fig. 2 also shows a sectional side view of the harmonium in the prior art showing the passage of air by dotted line. Fig. 3 shows the arrangement of reeds under individual keys (1-12), on the reedboards (A, B, C and D), in prior art. Fig. 4 and 5 show sectional sideview of the harmonium according to the present invention. Fig.6 shows the top view of the harmonium in the present invention. 1 6 DEC 2007 6 in the aforesaid figures, parts of the harmonium are denoted by the following numerals: Part No. Description of the Part 1 The 1st Key 2 The 2nd Key 3 The 3rd Key 4 The 4,h Key 5 The 5th Key 6 The 6,h Key 7 The 7th Key 8 The 8lh Key 9 The 9th Key 10 The 10th Key 11 The 11th Key 12 The 12th Key A The 1st Reedboard B The 2nd Reedboard C The 3rd Reedboard D The 4th Reedboard 1A Reed under Key 1 on reedboard A IB Reed under Key 1 on reedboard B 1C Reed under Key 1 on reedboard C 1D Reed under Key 1 on reedboard D 13 Bellows 14 Airbag 15 1st Individual Key Stopper 16 2nd Individual Key Stopper 17 3rd Individual Key Stopper 18 4th Individual Key Stopper 19 5th Individual Key Stopper 20 6th Individual Key Stopper 21 7th Individual Key Stopper 22 Stopper for reedboard 23 Spring in the airbag 24 Opening for passage of air from outside to Bellows 25 Opening for passage of air from Bellows to Wooden box 26 Opening for passage of air to and from airbag 27 Opening for passage of air from airbag to reedboard A in the harmonium in prior art, and to reedboards A and B in the harmonium in the present invention 28 Opening for passage of air from airbag to reedboard B in the harmonium in prior art, and to reedboards C and D in the harmonium in the present invention 29 Opening for passage of air from reedboard A to outside in the harmonium in prior art 29a Opening for passage of air from reedboard A to outside in the harmonium in the present invention 29b Opening for passage of air from reedboard B to outside in the harmonium in the present invention 30 Opening for passage of air from reedboard B to outside in the harmonium in prior art 30a Opening for passage of air from reedboard C to outside in the harmonium in the present invention 8 30b Opening for passage of air from reedboard D to outside in the harmonium in the present invention 31 Wooden box 32 Tongue of the reed 33 Body of the reed 34 Valve for bellows to prevent passage of air from bellows to outside 35 Spring for key to bring it back to nonplaying position The working of the Invention is now described. Fig. 3 shows the arrangement of reeds under individual keys (1-12), on the reedboards (A, B, C and D), in prior art. In prior art, all the reeds of all reedboards under Key (1), namely 1A, IB, 1C, and ID are tuned to the same frequency, whereas; in the present invention, under Key (1), the reeds 1A and IB belonging to reedboards A and B respectively are tuned to one frequency and the reeds 1C and ID belonging to reedboards C and D respectively under the same Key (1) are tuned to another frequency. Fig. 4 shows a sectional sideview of the harmonium according to the present invention showing 4 reedboards (A, B, C and D). The Individual Key Stopper (15) is in a given position wherein the opening 29a above reedboard A and the opening 29b above reedboard B under the Key (1) are operational/open (shown by a circle) , and the opening 30a above reedboard C and the opening 30b over reedboard D are non-operational/closed. This will allow passage of air only through the reeds belonging to the reedboards A and B under Key (1). Fig. 5 shows the sectional side view of the harmonium according to the present invention. This figure demonstrates Individual Key Stopper (15) in a given position wherein the openings 29a above reedboard A and 29b above reedboard 9 B under the Key (1) are non-operational/closed, and openings 30a above reedboard C and 30b above reedboard D are operational/open (shown by a circle). This will allow passage of air only through reeds belonging to reedboards C and D under Key (1). Fig.6 shows the top view of apart of the reedboard with individual key stoppers wherein stoppers 15, 19 and 21 are in a given position rendering the corresponding reeds under Key 1, Key 5 and Key 7 belonging to the reedboards C and reedboard D operational/open; and stoppers 16, 17, 18, 20 are in another position rendering the corresponding reeds under Key 2, Key 3, Key 4 and Key 6 belonging to the reedboards A and reedboard B operational/open. It can be seen that under Key (1) with individual stopper (15) in a given position, openings 29a and 29b (which come above the reeds 1A and IB respectively) are nonoperational/closed; whereas the openings 30a and 30b (which come above the reeds 1C and ID respectively) are operational/open. The harmonium in the present invention is played as follows. When the bellows are released, the air from outside enters bellows (13) through opening 24. When the bellows are pressed, the valve for bellows (34) prevents passage of air to leak from bellows to outside by closing the opening 24, and thereby pushing the air to the wooden box thro' opening 25. This air then enters the air bag (14) through opening 26 and is then compressed due to the spring in the airbag (23) and sent back through opening 26 again to openings 27 and 28 and thereafter to all the reedboards A, B, C, and D. Unlike the harmonium in the prior art, there is no stopper for reedboard (22) in the harmonium in the present invention. The air therefore is made available to all the reedboards A, B, C, and D at the same time. On pressing the Key (1) and bringing it into playing position, the Individual key stopper (15) will control the passage of air to go either through 10 the reedboards A and B when in a given position (Fig 4); or through the reedboards C and D when in another position (Fig 5). The air then passes through the reeds making a sound, and thereafter, leaves the harmonium through openings 29a, 29b; or 30a and 30b. The differential tuning of reeds in the present invention is achieved as follows. (Fig 3).The Base musical note (Note no.l) is tuned under Key (1) on reed no. 1A on reedboard A and also on reed no. IB on reedboard B. The The next note (Note no.2) is tuned under Key (1) on reed no. IC on reedboard C and also on reed no.ID on reedboard D and so on. When Key (1) is pressed, the individual key stopper (15) will allow the passage of air either through reeds 1A and IB when in a given position; or through the reeds IC and ID when in another position, fn this way, 2 different frequencies are made available to be selected by choice under the same key; and a total of 24 frequencies are made available under 12 keys. Against this, only 12 frequencies are available in the harmonium in the prior art. Additionally, my work demonstrates that these 24 frequencies in the present invention given as % increase from the Base musical note belong to the proposed fndian scale. Advantages: 1) Wider Range of musical notes is available, in the present invention. 2) Selection of individual musical notes is possible by providing individual key stoppers and differential tuning of reeds under the same key,. 3) The European 12-Tone Equitempered frequencies of the traditional harmonium are replaced by frequencies belonging to the proposed Indian scale. 11 I CLAIM 1) An improved harmonium having an outer box housing interalia bellows, an airbag, atleast two sets of reeds each set having atleast 12 reeds, a set of atleast 12 keys, each key corresponding to a reed on each set of reeds, wherein under each key are provided atleast two reeds of different frequencies and an individual stopper for each key allowing the passage of air selectively through either of the aforesaid reeds tuned to different frequencies under the same key. 2) An improved harmonium claimed in Claim 1 above, wherein it has atleast four sets of reeds out of which two reeds under each key are tuned to the same frequency whereas the other two reeds under the same key are tuned to another frequency and an individual stopper for each key allows the passage of air selectively through either pair of reeds under the same key. 3) An improved harmonium claimed in Claim 1 above, wherein, the airbag has a device to compress air within it. 4) An improved harmonium claimed in Claim 1 above, wherein the Base musical note is tuned on reed/s under any of the 12 keys and the frequencies of reeds other than the reed for base musical note are increased in the following proportion of the frequency of the base musical note. Note No. Key No. Tuned on % increase from Reed Nos. Base musical note 1 1 (Base musical note) 1A,IB 00.00 1 2 1C,1D 0.25 - 2.25 2 3 2A,2B 4.35 - 6.35 2 4 2C,2D 5.66 - 7.66 12 5) An improved harmonium claimed in Claim 1 above, wherein the frequency of base musical note is between 27.5 and 4186 hertz. 6) An improved harmonium claimed in Claim 5 above, wherein the frequency of base musical note is between 100 and 1000 hertz. 13 7) An improved harmonium claimed in Claim 1 above as more particularly described in the complete specification and shown in the accompanying drawings.

Full Text

FORM 2
THE PATENTS ACT, 1970
(39 OF 1970)
&
THE PATENT RULES, 2003
COMPLETE SPECIFICATION
[SECTION 10; RULE 13]
"AN IMPROVED HARMONIUM
DR. VIDYADHAR GOPAL OKE, 54A/32, VRINDAVAN,
THANE (WEST), 400601, MAHARASHTRA STATE, INDIA
THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES AND ASCERTAINS THE NATURE OF THIS INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED :

2
FIELD OF INVENTION:
The present invention relates to an improved harmonium.
BACKGROUND OF INVENTION:
Existing or traditional harmonium consists of a wooden box housing interalia bellows, a set of one to four reedboards, stoppers for each reed board to control passage of air moving from the airbag to the reedboard and then to the keyboard. The reedboard comprises of several adjacent reeds. A single reedboard produces a weaker sound and hence two or more reedboards are simultaneously played to produce sound of sufficiently high volume. A reed is made up of two parts namely, the body of the reed and the tongue of the reed that is a thin metal plate and fitted over the body of the reed, such that the air is blown from the airbag with the help of bellows facilitates the vibration of the tongue of the reed, producing a sound or a musical note. The quality of sound or musical note produced by a reed depends on its frequency. Frequency in turn depends on the metal, shape, size and the thickness of the tongue of each reed. Every reed on different reedboards corresponding to a single key on keyboard is tuned to the same frequency, because otherwise, when more than one reedboard is used to produce the sound, it will produce a dissonant sound due to different frequencies of reeds.
There are 12 musical notes corresponding to 12 keys in an octave and a harmonium may consist of more than 12 keys. The reeds in the traditional harmonium are tuned to specific musical notes as per the 12-Tone European Equitempered scale. Each reed is connected with the key which when pressed and braught into playing position, allows the air from the airbag to flow through the said reed, thereby facilitating the vibration of the tongue of the said reed,

3
producing a sound that is equivalent to the frequency to which the said reed is tuned. Thus in this way, within an octave only 12 musical notes of 12 different frequencies are obtained in the traditional harmonium, thereby giving no further scope for selection of musical notes beyond the said 12 musical notes.
The following Table 1 shows the % increase of the frequencies of the 12 musical notes as per the 12-tone European Equitempered scale from the Base musical note in a reedboard in the traditional harmonium. The Base musical note (shown as No.l in the following table) can be tuned on reed/s under any of the 12 keys.
Key Note Tuned on % Increase from
No. No. Reed Nos. Base musical note
1 1 1A,1B,1C,1D 00.00
(Base musical note}

2 2 2A,26,20,20 05.95
3 3 3A,3B,3C, 3D 12.25
4 4 4A,4B,4C, 4D 18. 92
5 5 5A,5B,5C,5D 26.00
6 6 6A, 6B,6C,6D 33.48
7 7 7A, 7B,7C,7D 41.42
8 8 8A, 8B,8C,8D 49.83
9 9 9A, 9B,9C,9D 58.74
10 10 10A,10B,10C,10D 68.18
11 11 11A,11B,11C,11D 78.18
12 12 12A,12B,12C,12D 88.77
The harmonium in the prior art is played as follows (Fig 2). When the bellows (13) are released, the air from outside enters the bellows through opening 24.

4
When the bellows are pressed, the valve for the bellows (34) prevents the air in the bellows to leak to outside by closing the opening 24, and thereby pushing the air to the wooden box thro' opening 25. Thereafter the air enters the wooden box thro' opening 25. This air enters the airbag (14) through opening 26 and is then compressed due to the spring (23) in the airbag and sent back through opening 26 and further sent through openings 27 and 28 to reedboards A and B respectively. On pressing the Key (1) and bringing it into playing position (Fig 2), the air passes through the reeds making a sound, and thereafter, leaves the harmonium through openings 29 and 30. The stopper for reedboard (22) is used to control the passage of air through openings 27 and 28. After the sound is produced, the Key (1) is returned to non-playing position (Fig 1).
The drawbacks of the traditional Harmonium are as follows:
1) Only 12 musical notes can be played in an octave.
2) The above 12 notes belong to the European 12-tone Equitempered scale
3) If reeds on different reedboards corresponding to the same key on the keyboard are tuned to different frequencies then either one cannot simultaneously play two or more reedboards (as it may produce dissonant sound) or if two or more reedboards are not simultaneously used to play the sound, then the resultant sound would be weaker.
OBJECT OF THE PRESENT INVENTION:
The present invention proposes a harmonium which would obviate the aforesaid drawbacks by providing a wide (more than 12) range of musical notes with a facility to select the desired notes. Except the 1st note i.e., the Base musical note which can be same in both the European and the Indian scales, these additional notes belong to the proposed Indian scale and are therefore different than the musical notes of European 12-Tone Equitempered scale available in the

5
traditional harmonium and it would yet produce consonant sound of sufficient volume.
DESCRIPTION OF THE PRESENT INVENTION:
According to this invention an improved harmonium has an outer box housing interalia bellows, an airbag, atleast two sets of reeds each set having atleast 12 reeds, a set of atleast 12 keys, each key corresponding to a reed on each set of reeds, wherein under each key are provided atleast two reeds of different frequencies and a stopper for each key allowing the passage of air selectively through either of the aforesaid reeds tuned to different frequencies under the same key.
The invention will now be described and explained with the help of drawings accompanying this specification. The said drawings and the description only illustrates the invention and in no way limit the same. In the figures drawn in the drawings, same numerals are used to denote the same parts.
Fig. 1 shows a sectional side view of the harmonium in the prior art.
Fig. 2 also shows a sectional side view of the harmonium in the prior art
showing the passage of air by dotted line.
Fig. 3 shows the arrangement of reeds under individual keys (1-12), on the
reedboards (A, B, C and D), in prior art.
Fig. 4 and 5 show sectional sideview of the harmonium according to the present
invention.
Fig.6 shows the top view of the harmonium in the present invention.
1 6 DEC 2007

6
in the aforesaid figures, parts of the harmonium are denoted by the following numerals:
Part No. Description of the Part
1 The 1st Key
2 The 2nd Key
3 The 3rd Key
4 The 4,h Key
5 The 5th Key
6 The 6,h Key
7 The 7th Key
8 The 8lh Key
9 The 9th Key
10 The 10th Key
11 The 11th Key
12 The 12th Key
A The 1st Reedboard
B The 2nd Reedboard
C The 3rd Reedboard
D The 4th Reedboard
1A Reed under Key 1 on reedboard A
IB Reed under Key 1 on reedboard B
1C Reed under Key 1 on reedboard C
1D Reed under Key 1 on reedboard D
13 Bellows
14 Airbag
15 1st Individual Key Stopper

16 2nd Individual Key Stopper
17 3rd Individual Key Stopper
18 4th Individual Key Stopper
19 5th Individual Key Stopper
20 6th Individual Key Stopper
21 7th Individual Key Stopper
22 Stopper for reedboard
23 Spring in the airbag
24 Opening for passage of air from outside to Bellows
25 Opening for passage of air from Bellows to Wooden box
26 Opening for passage of air to and from airbag
27 Opening for passage of air from airbag to reedboard A in the
harmonium in prior art, and to reedboards A and B in the harmonium in the present invention
28 Opening for passage of air from airbag to reedboard B in the
harmonium in prior art, and to reedboards C and D in the harmonium in the present invention
29 Opening for passage of air from reedboard A to outside in the
harmonium in prior art
29a Opening for passage of air from reedboard A to outside in the
harmonium in the present invention
29b Opening for passage of air from reedboard B to outside in the
harmonium in the present invention
30 Opening for passage of air from reedboard B to outside in the
harmonium in prior art
30a Opening for passage of air from reedboard C to outside in the
harmonium in the present invention

8
30b Opening for passage of air from reedboard D to outside in the
harmonium in the present invention
31 Wooden box
32 Tongue of the reed
33 Body of the reed
34 Valve for bellows to prevent passage of air from bellows to outside
35 Spring for key to bring it back to nonplaying position
The working of the Invention is now described.
Fig. 3 shows the arrangement of reeds under individual keys (1-12), on the reedboards (A, B, C and D), in prior art. In prior art, all the reeds of all reedboards under Key (1), namely 1A, IB, 1C, and ID are tuned to the same frequency, whereas; in the present invention, under Key (1), the reeds 1A and IB belonging to reedboards A and B respectively are tuned to one frequency and the reeds 1C and ID belonging to reedboards C and D respectively under the same Key (1) are tuned to another frequency.
Fig. 4 shows a sectional sideview of the harmonium according to the present invention showing 4 reedboards (A, B, C and D). The Individual Key Stopper (15) is in a given position wherein the opening 29a above reedboard A and the opening 29b above reedboard B under the Key (1) are operational/open (shown by a circle) , and the opening 30a above reedboard C and the opening 30b over reedboard D are non-operational/closed. This will allow passage of air only through the reeds belonging to the reedboards A and B under Key (1).
Fig. 5 shows the sectional side view of the harmonium according to the present invention. This figure demonstrates Individual Key Stopper (15) in a given position wherein the openings 29a above reedboard A and 29b above reedboard

9
B under the Key (1) are non-operational/closed, and openings 30a above reedboard C and 30b above reedboard D are operational/open (shown by a circle). This will allow passage of air only through reeds belonging to reedboards C and D under Key (1).
Fig.6 shows the top view of apart of the reedboard with individual key stoppers wherein stoppers 15, 19 and 21 are in a given position rendering the corresponding reeds under Key 1, Key 5 and Key 7 belonging to the reedboards C and reedboard D operational/open; and stoppers 16, 17, 18, 20 are in another position rendering the corresponding reeds under Key 2, Key 3, Key 4 and Key 6 belonging to the reedboards A and reedboard B operational/open. It can be seen that under Key (1) with individual stopper (15) in a given position, openings 29a and 29b (which come above the reeds 1A and IB respectively) are nonoperational/closed; whereas the openings 30a and 30b (which come above the reeds 1C and ID respectively) are operational/open.
The harmonium in the present invention is played as follows. When the bellows are released, the air from outside enters bellows (13) through opening 24. When the bellows are pressed, the valve for bellows (34) prevents passage of air to leak from bellows to outside by closing the opening 24, and thereby pushing the air to the wooden box thro' opening 25. This air then enters the air bag (14) through opening 26 and is then compressed due to the spring in the airbag (23) and sent back through opening 26 again to openings 27 and 28 and thereafter to all the reedboards A, B, C, and D. Unlike the harmonium in the prior art, there is no stopper for reedboard (22) in the harmonium in the present invention. The air therefore is made available to all the reedboards A, B, C, and D at the same time. On pressing the Key (1) and bringing it into playing position, the Individual key stopper (15) will control the passage of air to go either through

10
the reedboards A and B when in a given position (Fig 4); or through the reedboards C and D when in another position (Fig 5). The air then passes through the reeds making a sound, and thereafter, leaves the harmonium through openings 29a, 29b; or 30a and 30b.
The differential tuning of reeds in the present invention is achieved as follows. (Fig 3).The Base musical note (Note no.l) is tuned under Key (1) on reed no. 1A on reedboard A and also on reed no. IB on reedboard B. The The next note (Note no.2) is tuned under Key (1) on reed no. IC on reedboard C and also on reed no.ID on reedboard D and so on. When Key (1) is pressed, the individual key stopper (15) will allow the passage of air either through reeds 1A and IB when in a given position; or through the reeds IC and ID when in another position, fn this way, 2 different frequencies are made available to be selected by choice under the same key; and a total of 24 frequencies are made available under 12 keys. Against this, only 12 frequencies are available in the harmonium in the prior art.
Additionally, my work demonstrates that these 24 frequencies in the present invention given as % increase from the Base musical note belong to the proposed fndian scale.
Advantages:
1) Wider Range of musical notes is available, in the present invention.
2) Selection of individual musical notes is possible by providing individual key stoppers and differential tuning of reeds under the same key,.
3) The European 12-Tone Equitempered frequencies of the traditional
harmonium are replaced by frequencies belonging to the proposed Indian scale.

11

I CLAIM
1) An improved harmonium having an outer box housing interalia bellows, an airbag, atleast two sets of reeds each set having atleast 12 reeds, a set of atleast 12 keys, each key corresponding to a reed on each set of reeds, wherein under each key are provided atleast two reeds of different frequencies and an individual stopper for each key allowing the passage of air selectively through either of the aforesaid reeds tuned to different frequencies under the same key.
2) An improved harmonium claimed in Claim 1 above, wherein it has atleast four sets of reeds out of which two reeds under each key are tuned to the same frequency whereas the other two reeds under the same key are tuned to another frequency and an individual stopper for each key allows the passage of air selectively through either pair of reeds under the same key.
3) An improved harmonium claimed in Claim 1 above, wherein, the airbag has a device to compress air within it.
4) An improved harmonium claimed in Claim 1 above, wherein the Base musical note is tuned on reed/s under any of the 12 keys and the frequencies of reeds other than the reed for base musical note are increased in the following proportion of the frequency of the base musical note.
Note No.
Key No.
Tuned on % increase from
Reed Nos. Base musical note
1 1
(Base musical note) 1A,IB 00.00
1 2 1C,1D 0.25 - 2.25
2 3 2A,2B 4.35 - 6.35 2 4 2C,2D 5.66 - 7.66

12

5) An improved harmonium claimed in Claim 1 above, wherein the frequency of base musical note is between 27.5 and 4186 hertz.
6) An improved harmonium claimed in Claim 5 above, wherein the frequency of base musical note is between 100 and 1000 hertz.

13
7) An improved harmonium claimed in Claim 1 above as more particularly described in the complete specification and shown in the accompanying drawings.

Documents:

2007-mum-2006-abstract(6-12-2007).doc

2007-mum-2006-abstract(6-12-2007).pdf

2007-mum-2006-abstract-1.jpg

2007-MUM-2006-ANNEXURE 1(5-12-2011).pdf

2007-mum-2006-claims(6-12-2007).doc

2007-mum-2006-claims(6-12-2007).pdf

2007-MUM-2006-CLAIMS(AMENDED)-(4-10-2011).pdf

2007-MUM-2006-CLAIMS(AMENDED)-(5-12-2011).pdf

2007-mum-2006-correspondance-received.pdf

2007-MUM-2006-CORRESPONDENCE(04-05-2009).pdf

2007-mum-2006-correspondence(28-12-2007).pdf

2007-mum-2006-description (provisional).pdf

2007-mum-2006-description(complete)-(6-12-2007).pdf

2007-mum-2006-drawing(6-12-2007).pdf

2007-mum-2006-drawings.pdf

2007-mum-2006-form 18(28-12-2007).pdf

2007-mum-2006-form 2(6-12-2007).doc

2007-mum-2006-form 2(6-12-2007).pdf

2007-mum-2006-form 2(title page)-(6-12-2007).pdf

2007-MUM-2006-FORM 26(4-10-2011).pdf

2007-mum-2006-form 5(6-12-2007).pdf

2007-mum-2006-form-1.pdf

2007-mum-2006-form-2.doc

2007-mum-2006-form-2.pdf

2007-mum-2006-form-26.pdf

2007-mum-2006-form-3.pdf

2007-MUM-2006-REPLY TO EXAMINATION REPORT(4-10-2011).pdf

2007-MUM-2006-REPLY TO HEARING (5-12-2011).pdf

2007-MUM-2006-REPLY TO HEARING(5-12-2011).pdf

2007-MUM-2006-SPECIFICATION(AMENDED)-(4-10-2011).pdf

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Patent Number

250197

Indian Patent Application Number

2007/MUM/2006

PG Journal Number

51/2011

Publication Date

23-Dec-2011

Grant Date

15-Dec-2011

Date of Filing

06-Dec-2006

Name of Patentee

VIDYADHAR GOPAL OKE

Applicant Address

54A/32,VRINDAVAN, THANE (WEST), MUMBAI 400 601,

Inventors:

#	Inventor's Name	Inventor's Address
1	VIDYADHAR GOPAL OKE	54A/32,VRINDAVAN, THANE (WEST), MUMBAI 400 601,

PCT International Classification Number

G10B1/00

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA