Title of Invention	"AN EARTH QUAKE ALARM"
Abstract	This invention relates to an earthquake alarm characterized in that a box (10) having suspension means (1) held to a cover (7) of said box and a mass (2) suspended with in the box having prelocated slots (3) for transmitting a signal from a transmitter (5) on one wall (8) of the box to a receiver (4) provided on opposite wall (9) of the box wherein said sensor (4) is connected to an amplifier (11), which is connected to an alarm (13) through a latch circuit (12) and the position of the receiver and transmitter is adjustable.

Title of Invention

"AN EARTH QUAKE ALARM"

Abstract

This invention relates to an earthquake alarm characterized in that a box (10) having suspension means (1) held to a cover (7) of said box and a mass (2) suspended with in the box having prelocated slots (3) for transmitting a signal from a transmitter (5) on one wall (8) of the box to a receiver (4) provided on opposite wall (9) of the box wherein said sensor (4) is connected to an amplifier (11), which is connected to an alarm (13) through a latch circuit (12) and the position of the receiver and transmitter is adjustable.

Full Text	FIELD OF INVENTION This invention relates to an earthquake alarm. BACKGROUND OF INVENTION One of the disadvantages with an earthquake is that an individual is often not aware of the presence of such an earthquake till the tremor or tremors cease. Such an absence of an alarm means can result in an injury being caused to an individual. U.S. Patent no.4,408,196 issued on October 4, 1983 to Freeman describes an alarm system is provide for detecting a seismic tremor and for generation of an audio and visual alarm which varies depends upon the magnitude of the earthquake. The alarm system comprises of a free running oscillator having pair of terminals the capacitance value across which controls the frequency of the oscillator. A fixed oscillator plate is electrically connected to the other terminal and has an inertia! mass secured to it. The change in the position of the plate's results change in the oscillator, which cause the alarm. This system consists of complex electronic circuit and system is not compatible with the reset option. U.S. Patent no. 4,361,740 issued on November 30, 1982 to Stockdal describes a sensor which essentially consists of central annular member having an inner conductive periphery. The annular member is coaxially positioned round a center post located in a housing. Earthquake vibrations which causes dislocation of member annunciate the alarm. Such an instrument is mechanical U.S. Patent no. 4,292,690 issued on October 27, 1982 to Baker describes a lateral detector comprises of solid inertial mass that detects the lateral moment of the support as the measure of an impending earthquake. Electrical contacts associated with the mass and the supports energize an audible circuit for generation an alarm to the occupant of the structure. Such a system is not compatible with the visual indication and reset options. U.S. Patent no. 4,764,761 issued on August 16, 1988 to Maquire describes a sensing device, which is resting at a perch having a narrow upper base. In case of tremor the ball falls of the perch and is intercepted by contact plate and thereby close the electric circuit which include the bell. In this mechanical system it is difficult to sit the ball over the perch again and again at the time of calibration of setting the instrument. STATEMENT OF INVENTION According to this invention there is provided an earthquake alarm characterized in that a box having suspension means held to a cover of said box and a mass suspended with in the box having prelocated slots for transmitting a signal from a transmitter on one wall of the box to a receiver provided on opposite wall of the box wherein said sensor is connected to an amplifier, which is connected to an alarm through a latch circuit and the position of the receiver and transmitter is adjustable. BRIEF DESCRIPTION ON INVENTION In accordance with this invention the alarm comprised a rigid box adapted to have a mass suspended therein. The mass may be suspended by a pair of springs or many suspension means, which allows a displacement of the mass in the presence of vibrations being imparted to the box. The mass has prelocated holes to allow signals to pass there through. A transmitter or a light emitter is orovided on one side of said box. A receiver is provided on the opposite side of said box and such that in an absence of a displacement of the mass, the signals from said transmitter or light emitter travels through said holes and received by the receiver. However, in the instance of a displacement of the mass, which arises in instance of an earthquake, the path of the signal through the holes is disturbed and an alarm is activated. Due to latching of first vibration the beep of alarm will annunciate continuously to the host. It will also give visual indication by blinking LED (light emitting diode) fitted on panel. The sensitivity of the instruments can be increased by adjusting the position of sensor/transmitter. The size of hole is specified in order to bear the sagging of mass in hot days, which is 5-40 mm x 2-15 mm. Further objects and advantages of this invention will be more apparent from the ensuing description when read in conjunction with the accompanying drawings and wherein: Fig. 1 shows the alarm of the present invention and Fig. 2 shows the block diagram of the circuit. Referring to the drawings, and with particular reference to fig. 1, the device comprises a base 10 having springs 1 held to the cover 7 of said box. A mass 2 is suspended from springs 1. Mass 2 may be made of any suitable material, such as aluminum, and has transverse slots 3. A transmitter 5 for transmitting a signal is provided on one of walls 8 of box 10. A receiver of sensor 4 is provided on the opposite wall 9 of box 10 and such that receiver 4 is capable of receiving the signals from transmitter 5 through slots 3. Box has holes 6. In the absence of a vibration due to a non-occurrence of an earthquake the signal passes from transmitter 5 through slots 3 and received by sensor 4. However, in the presence of an earthquake resulting in tremors, mass 2 is displaced resulting in a distortion in the path of the signal from transmitter 5 and whereby the annunciator circuit of fig. 2 is activated. The annunciator circuit of fig.2 comprises transmitter 5 and a sensor or receiver 4 adapted to receive the transmitted signals. Receiver 4 is connected to an amplifier 11. Amplifier 11 activates an audio alarm 13 through a latch circuit 12 with reset option and indicator. Reverting to fig.l the embodiment illustrated therein shows mass 2 suspended from springs 1. In accordance with another embodiment, mass 1 may be supported on springs 1. WE CLAIM; 1. An earthquake alarm characterized in that a box (10) having suspension means (1) held to a cover (7) of said box and a mass (2) suspended with in the box having prelocated slots (3) for transmitting a signal from a transmitter (5) on one wall (8) of the box to a receiver (4) provided on opposite wall (9) of the box wherein said sensor (4) is connected to an amplifier (11), which is connected to an alarm (13) through a latch circuit (12) and the position of the receiver and transmitter is adjustable. 2. An earthquake alarm as claimed in claim 1 wherein said holes are transverse slots of size 5-40 mrn x 2-15 mm. 3. An earthquake alarm as claimed in claim 1 or 2 wherein said mass (2) is suspended from or supported on the springs fl)

Full Text

FIELD OF INVENTION
This invention relates to an earthquake alarm. BACKGROUND OF INVENTION
One of the disadvantages with an earthquake is that an individual is often not aware of the presence of such an earthquake till the tremor or tremors cease. Such an absence of an alarm means can result in an injury being caused to an individual.
U.S. Patent no.4,408,196 issued on October 4, 1983 to Freeman describes an alarm system is provide for detecting a seismic tremor and for generation of an audio and visual alarm which varies depends upon the magnitude of the earthquake. The alarm system comprises of a free running oscillator having pair of terminals the capacitance value across which controls the frequency of the oscillator. A fixed oscillator plate is electrically connected to the other terminal and has an inertia! mass secured to it. The change in the position of the plate's results change in the oscillator, which cause the alarm. This system consists of complex electronic circuit and system is not compatible with the reset option.
U.S. Patent no. 4,361,740 issued on November 30, 1982 to Stockdal describes a sensor which essentially consists of central annular member having an inner conductive periphery. The annular member is coaxially positioned round a center post located in a housing. Earthquake vibrations which causes dislocation of member annunciate the alarm. Such an instrument is mechanical
U.S. Patent no. 4,292,690 issued on October 27, 1982 to Baker describes a lateral detector comprises of solid inertial mass that detects the lateral moment of the support as the measure of an impending earthquake. Electrical contacts associated with the mass and the supports energize an audible circuit for generation an alarm to the occupant of the structure. Such a system is not compatible with the visual indication and reset options.
U.S. Patent no. 4,764,761 issued on August 16, 1988 to Maquire describes a sensing device, which is resting at a perch having a narrow upper base. In case of tremor the ball falls of the perch and is intercepted by contact plate and thereby close the electric circuit which include the bell. In this mechanical system it is difficult to sit the ball over the perch again and again at the time of calibration of setting the instrument.
STATEMENT OF INVENTION
According to this invention there is provided an earthquake alarm characterized in that a box having suspension means held to a cover of said box and a mass suspended with in the box having prelocated slots for transmitting a signal from a transmitter on one wall of the box to a receiver provided on opposite wall of the box wherein said sensor is connected to an amplifier, which is connected to an alarm through a latch circuit and the position of the receiver and transmitter is adjustable.
BRIEF DESCRIPTION ON INVENTION
In accordance with this invention the alarm comprised a rigid box adapted to have a mass suspended therein. The mass may be suspended by a pair of springs or many suspension means, which allows a displacement of the mass in the presence of vibrations being imparted to the box.
The mass has prelocated holes to allow signals to pass there through. A transmitter or a light emitter is orovided on one side of said box. A receiver is provided on the opposite side of said box and such that in an absence of a displacement of the mass, the signals from said transmitter or light emitter travels through said holes and received by the receiver. However, in the instance of a displacement of the mass, which arises in
instance of an earthquake, the path of the signal through the holes is disturbed and an alarm is activated. Due to latching of first vibration the beep of alarm will annunciate continuously to the host. It will also give visual indication by blinking LED (light emitting diode) fitted on panel. The sensitivity of the instruments can be increased by adjusting the position of sensor/transmitter. The size of hole is specified in order to bear the sagging of mass in hot days, which is 5-40 mm x 2-15 mm.
Further objects and advantages of this invention will be more apparent from the ensuing description when read in conjunction with the accompanying drawings and wherein:
Fig. 1 shows the alarm of the present invention and Fig. 2 shows the block diagram of the circuit.
Referring to the drawings, and with particular reference to fig. 1, the device comprises a base 10 having springs 1 held to the cover 7 of said box. A mass 2 is suspended from springs 1. Mass 2 may be made of any suitable material, such as aluminum, and has transverse slots 3. A transmitter 5 for transmitting a signal is provided on one of walls 8 of box 10. A receiver of sensor 4 is provided on the opposite wall 9 of box 10 and such that receiver 4 is capable of receiving the signals from transmitter 5 through slots 3. Box has holes 6. In the absence of a vibration due to a non-occurrence of an earthquake the signal passes from transmitter 5 through slots 3 and received by sensor 4. However, in the presence of an earthquake resulting in tremors, mass 2 is displaced resulting in a distortion in the path of the signal from transmitter 5 and whereby the annunciator circuit of fig. 2 is activated.
The annunciator circuit of fig.2 comprises transmitter 5 and a sensor or receiver 4 adapted to receive the transmitted signals. Receiver 4 is connected to an amplifier 11. Amplifier 11 activates an audio alarm 13 through a latch circuit 12 with reset option and indicator.
Reverting to fig.l the embodiment illustrated therein shows mass 2 suspended from springs 1. In accordance with another embodiment, mass 1 may be supported on springs 1.

WE CLAIM;
1. An earthquake alarm characterized in that a box (10) having
suspension means (1) held to a cover (7) of said box and a mass (2)
suspended with in the box having prelocated slots (3) for
transmitting a signal from a transmitter (5) on one wall (8) of the
box to a receiver (4) provided on opposite wall (9) of the box
wherein said sensor (4) is connected to an amplifier (11), which is
connected to an alarm (13) through a latch circuit (12) and the
position of the receiver and transmitter is adjustable.
2. An earthquake alarm as claimed in claim 1 wherein said holes are
transverse slots of size 5-40 mrn x 2-15 mm.
3. An earthquake alarm as claimed in claim 1 or 2 wherein said mass
(2) is suspended from or supported on the springs fl)

Documents:

834-del-2001-abstract.pdf

834-del-2001-claims.pdf

834-DEL-2001-Correspondence-Others-(09-02-2010).pdf

834-DEL-2001-Correspondence-Others.pdf

834-del-2001-correspondence-po.pdf

834-del-2001-description (complete).pdf

834-del-2001-drawings.pdf

834-del-2001-form-1.pdf

834-DEL-2001-Form-15-(09-02-2010).pdf

834-del-2001-form-18.pdf

834-del-2001-form-2.pdf

834-del-2001-form-3.pdf

834-del-2001-form-4.pdf

834-del-2001-form-5.pdf

834-del-2001-gpa.pdf

834-del-2001-petition-138.pdf

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Patent Number

220748

Indian Patent Application Number

834/DEL/2001

PG Journal Number

30/2008

Publication Date

25-Jul-2008

Grant Date

04-Jun-2008

Date of Filing

08-Aug-2001

Name of Patentee

GOVERNMENT POLYTECHNIC

Applicant Address

Inventors:

#	Inventor's Name	Inventor's Address
1	KULDEEP SINGH

PCT International Classification Number

G08B 02/00

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA