Title of Invention	A MECHANISM TO MOVE AN INTERLOCK POWER CONTACT IN SWITCH BOARD FEEDERS
Abstract	The present invention relates to a mechanism adapted to move and interlock power contacts in switchboard feeders. The mechanism comprises feeder frame means (2). In the feeder frame (2) a modular section is located and engaged with an actuating means (10) located outside the frame. The modular section comprises plurality of sections comprising rod means (11) and hollow chamber means (13). The rod means (11) comprises plurality of supporting element (12) and is telescopically disposed in said hollow chamber means (13). Hollow chamber means (13) comprises plurality of slot means (A, B & C) located on the chamber (13) to co-operate with interlocking means (3) operatively and movably located on the feeder frame (2).

Title of Invention

A MECHANISM TO MOVE AN INTERLOCK POWER CONTACT IN SWITCH BOARD FEEDERS

Abstract

The present invention relates to a mechanism adapted to move and interlock power contacts in switchboard feeders. The mechanism comprises feeder frame means (2). In the feeder frame (2) a modular section is located and engaged with an actuating means (10) located outside the frame. The modular section comprises plurality of sections comprising rod means (11) and hollow chamber means (13). The rod means (11) comprises plurality of supporting element (12) and is telescopically disposed in said hollow chamber means (13). Hollow chamber means (13) comprises plurality of slot means (A, B & C) located on the chamber (13) to co-operate with interlocking means (3) operatively and movably located on the feeder frame (2).

Full Text	FORM2THE PATENTS ACT, 1970(39 of 1970)&The Patents Rules, 2003COMPLETE SPECIFICATION(See section 10; rule 13) Title of the invention - MECHANISM FOR MOVING AND INTERLOCKINGPOWER CONTACTS 2. Applicant(a) NAME : LARSEN & TOUBRO LIMITED(b) NATIONALITY: An Indian Company(c) ADDRESS : L&T House, Ballard Estate, Mumbai 400 001,State of Maharashtra, India 3. PREAMBLE TO THE DESCRIPTION The following specification particularly describes the invention and the manner in which it is to be performed: FIBLD OF INVENTION The present invention relates to a mechanism for movement and interlocking of power contacts. The invention particularly, relates to a mechanism adapted to move and interlock power contacts, in switchboard feeders, from Service to Test position and vice-a-versa, with door closed and without any movement of the feeder with respect to the structure of the switchboard. BACKGROUND AND PRIOR ART In present scenario power contacts of the switchboard feeder assembly are mounted on the feeder frame itself. Hence for movement of power contacts from one functional position "Service" to another functional position "Test", feeder frame itself is required to move with respect to switchboard structure. Also in present feeder system the door of the feeder is not integral with the feeder frame, but is hinged to the structure. Hence for the movement of the feeder frame the door is required to be opened up which can also violet ingredients protection. Also the operator may get exposed to any live component making the situation hazardous. US5,680,926 deals with a mechanical interlock mechanism for operating an electrical wiring device with an electrical connector assembly. The mechanical interlock mechanism comprises an operating handle effectively locked by the interlock mechanism such that the handle cannot be rotated 2 to activate the switch and energize the terminals of the electrical connector. In the existing technologies and the prior art no such mechanism for providing rotation motion preceding transitional linear motion has been found for providing safe mechanical interlocking while engagement and disengagement of power contacts without moving the feeder and with door of the assembly remaining in closed position. In existing feeders door is not the part of feeder frame, but it is hinged onto the structure. Feeder frame is fixed to guide rails, which are mounted on the tray. Feeder frame is also attached to a nut fixed on the tray through a lead screw fixed into it. Also power contacts are fixed to the frame Hence, contacts cannot be moved keeping the feeder frame fixed. To move contacts to test position the whole feeder frame has to be withdrawn by rotating the lead screw The lead screw requires considerable number of rotations for the particular movement and takes time. Also lead screw is accessible only when the door is open. While removing the feeder frame contacts may get exposed to the user. Thus there is a need to provide for a mechanism adapted to move and interlock power contacts, in switchboard feeders, from Service to Test position and vice-a-versa with safety without moving the feeder. The present inventors have found that by way of providing plurality of slot profiles with unique constructions so as to provide appropriate rotational movement preceding transitional linear movement in the actuator means it is 3 possible to achieve mechanical interlocking in contactor system . OBJECTS OF INVNETION Thus one object of the present invention is to provide a mechanism for mechanical interlocking of power contact during engagement and disengagement of power contacts. Another object of the present invention is to provide movement of power contact from Service to Test position and vice-a-versa. Yet another object of the present invention is to provide movement of power contact with door in closed condition. Another object of the present invention is to keep feeder static with respect to the structure of switchboard. Yet one more object of the present invention is to provide higher level of safety during movement of the power contacts. The other object of the .present invention is to provide quick and easy operation. SUMMARY OF INVENTION According to one aspect of the present invention there is provided a mechanism adapted to move and interlock power contacts in switchboard feeders, said mechanism comprising 4 feeder frame means; modular section operatively located inside the feeder frame and engaged with an actuating means located outside the frame, wherein said modular section comprises plurality of sections comprising rod means and hollow chamber means wherein rod means comprising plurality of supporting element located on the rod at predetermined positions, said rod means being telescopically disposed in said hollow chamber means Wherein said hollow chamber means comprises plurality of slot means located on the chamber in a manner to co-operate With interlocking means operatively and movably located on feeder frame wherein said slot means being angularly extended so as to provide desired rotation followed by transitional linear motions of rod means to move and interlock at desired positions required during operation of power contacts. DETAILED DESCRIPTION OF INVENTION In the mechanism of the present invention both male and female power contacts have transitional linear motion and a rotational movement for the defeat of interlock while they are being engaged or disengaged as in the previous case. The rotational movement always precedes transitional motion both while engagement and disengagement of power contacts. 5 Actuating means comprises a handle, which is the part of the mechanism projecting out of feeder door. This handle can be operated to achieve both above-mentioned rotational and transitional motion keeping the door closed. It minimizes chances of the exposure of the any live components to the operator and also ingredients protection. Hence ensures the safety of the operator. The handle is operatively engaged to modular section comprising rod means telescopically inserted in a hollow Chamber. The hollow chamber, which is barrel shaped comprises of plurality of slots having differently extended Angles. The rod means comprises plural supporting elements, hereinafter referred to as act pins which are disposed in the slots. BRIEF DESCRIPTION OF ACCOMPANYING FIGURES figure 1 illustrates overall isometric view of the mechanism of the present invention. Figure 2 illustrates an exploded view of the mechanism of the present invention. figure 3 illustrates a sectional view of barrel showing all Slots. Enlarged views are illustrated in Detail 3A and Retail 3B. Figure 3C illustrates the plan view of the barrel. figures 4a, 4b and 4c illustrates the sectional views of the slots. 6 DETAILED DESCRIPTION OF ACCOMPANYING FIGURES Figure 1 shows the overall view of the assembly. Mechanism is mounted in the feeder frame. Feeder frame consists of feeder frame and an integral door. Mechanism (8) is guided through the bush (1) mounted on the front face of the frame (2). Motion guides (9), are mounted in the feeder frame, over which Contact mounting back moves. Two numbers of latches (3) are used as interlocks in service and test positions. Latches are pivoted on the latch pin (5), which is fixed to the latch bracket (4) (also shown in the enlarged view Detail A) . Two latches (3) (also shown in the enlarged view Detail A) are assembled reciprocally in such a way that they are mirror of each other with respect to the axis of the latch pin (5). Both latches (3) are separated by latch sleeve (6) (also shown in the enlarged view Detail A). Latches (3) are preloaded with latch spring (7) . Latch springs (7) (also shown in the enlarged view Detail A) are torsion springs. Hence, latches (3) are rotated about the latch pin (5) against the force of latch spring (7). Figure 2 shows details of mechanism (8) with its components in exploded condition. Handle (10) is fixed to rod (11) by two act pins (12) . Rod (11) is inserted into the barrel (13). Act pins (12) at Q, O, and P on the rod are trapped with slots at A, B, and C on the barrel (13) respectively. Barrel (13), mechanism (8) and slots at A, B and C are also 4hown in the enlarged view marked as Detail B. 7 Figure 3 reveals slots (A, B, & C) on the barrel (13) . Sectional views are shown in figures marked as Detail 3A and Detail 3B showing the horizontal line H. Slots (A, B & C) are circumferential. As shown is figures 4a, 4b and 4c slot at section A extends 90° in clockwise direction from the horizontal reference plane "H", slot at section B extends 90° in anticlockwise direction from the horizontal reference plane WH" and slot at section C extends 30° in clockwise direction from the horizontal reference plane As shown in figure 3 rod (11) is free to rotate inside the barrel (13) through 30°. Power contacts (14) are fixed to Contact mounting back (15), which in turn is fixed to the other end of the barrel (13) through cylindrical insert (16) . Hence, any axial movement of the handle (10) will be transmitted to power contacts (14), which are mounted on Contact mounting back (15). Working:! Initially power contacts are in service position and top latch (3) is engaged with the slot at section A in the barrel, thus preventing the undesirable movement of the handle and power contacts. To move power contacts to the test position, handle is turned in clockwise direction to defeat the top latch. Rotating handle rotates the act pin, at section A in the barrel, which will force the top latch out of the slot at section A in barrel to free the axial movement of the handle. The movement of the handle in outward direction is imparted to power contacts. Hence, power contacts get disengaged and move relative to the 8 feeder frame. Movement continues till the bottom latch gets engaged with the slot at section B in the barrel. Engagement of the bottom latch with the slot at section B in the barrel prevents further travel of handle and thus ensures the arrival of test position. For movement of power contacts from Test position to service position, handle is turned in anticlockwise direction to defeat the bottom latch. Rotating handle Rotates the act pin, at section B in the barrel, which will force the bottom latch out of the slot at section B in barrel to free the axial movement of the handle. The movement of the handle in inward direction is imparted to power contacts. Hence, power contacts move relative to the feeder frame and engage with their counter part. Movement Continues till the top latch gets engaged with the slot at Section A in the barrel. Engagement of the top latch with the slot at section A in the barrel prevents further travel of handle and thus ensures the arrival of service position. Advantages : [1]. Withdrawal of power contacts from service to test position with door closed. 2. Interlocks to prevent accidental movement and distinguished positions. 3. Higher level of safety. 4. Increased ingredient protection level. 5. Quick and easy by simple push/pull operation. 9 The invention has been described in a preferred form only and many variations may be made the invention which will still be comprised within its spirit. The invention is not limited to the details cited above. The slots and angles herein described may be replaced by its technical equivalence and values and yet the invention can be performed. The latch spring described herein as torsion spring can be any other springs and yet the invention can Be performed. The structure thus conceived is susceptible of numerous modifications and variations, all the details may furthermore be replaced with elements having technical equivalence. In practice the materials and dimensions may be any according to the requirements, which will still be Comprised within its true spirit. 10 A mechanism adapted to move and interlock power contacts in switchboard feeders, said mechanism comprising feeder frame means; modular section operatively located inside the feeder frame and engaged with an actuating means located Outside the frame, wherein said modular section comprises plurality of sections comprising rod means and hollow chamber means wherein rod means comprising plurality of supporting element located on the rod at predetermined positions, said rod means being telescopically disposed in said hollow chamber means wherein said hollow chamber means comprises plurality of slot means located on the chamber in a manner to £o-operate with interlocking means operatively and movably located on feeder frame wherein said slot means being angularly extended so as to provide desired rotation followed by transitional linear motions of rod means to move and interlock at desired positions required during operation of power contacts. Mechanism as claimed in claim 1, wherein the supporting element comprises act pins. 11 Mechanism as claimed in claim 1, wherein said interlocking means comprises plurality of latch means including top latch and bottom latch provided pivotally in the feeder frame in a manner to operatively engage with slot means. Mechanism as claimed in claim 3, wherein the top latch is in a reciprocal relation to bottom latch in a manner so as to rotate about a predetermined axis thereby accommodating in the slot providing interlocking. Mechanism as claimed in claims 3 and 4, wherein the latch means are spring loaded adapted to rotate about the pivot against the force of latch spring. Mechanism as claimed in any preceding claims, wherein Slot means comprises slot A, slot B and slot and slot Mechanism as claimed in claim 6, wherein slot A . Extends to approximately right angle in clockwise direction, slot B extends to approximately right angle in anti-clockwise and slot C extends to approximately 30° in clockwise direction from horizontal frame of reference such that the rod is able to freely rotate through about 30°. Mechanism as claimed in claim 1, wherein the actuating means comprises handle being engaged with the rod adapted to defeat the bottom latch in a manner such 12 that any rotational movement of the handle is transferred to transitional linear motion of the rod. 9. Mechanism as claimed in claim 1, where the chamber means further comprises cylindrical insert such that the power contacts move receiving corresponding motion of the handle. 10 A mechanism for moving and interlocking power contacts in switchboard feeders as herein substantially described and illustrated with reference to the Accompanying figures. Coated this 5th day of February 2007 13 ABSTRACT TITLE : MECHANISM FOR MOVING AND INTERLOCKING POWER CONTACTS The present invention relates to a mechanism adapted to move and interlock power contacts in switchboard feeders. The mechanism comprises feeder frame means (2) . In the feeder frame (2) a modular section is located and engaged with an actuating means (10) located outside the frame. The modular section comprises plurality of sections comprising rod means (11) and hollow chamber means (13) . The rod means (11) comprises plurality of supporting element (12) and is telescopically disposed in said hollow chamber means (13) . Hollow chamber means (13) comprises plurality of slot means (A, B & C) located on the chamber (13) to co-operate with interlocking means (3) operatively and movably located on the feeder frame (2). Figure 2

Full Text

FORM2THE PATENTS ACT, 1970(39 of 1970)&The Patents Rules, 2003COMPLETE SPECIFICATION(See section 10; rule 13)
Title of the invention - MECHANISM FOR MOVING AND INTERLOCKINGPOWER CONTACTS
2. Applicant(a) NAME : LARSEN & TOUBRO LIMITED(b) NATIONALITY: An Indian Company(c) ADDRESS : L&T House, Ballard Estate, Mumbai 400 001,State of Maharashtra, India
3. PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed:

FIBLD OF INVENTION
The present invention relates to a mechanism for movement and interlocking of power contacts. The invention particularly, relates to a mechanism adapted to move and interlock power contacts, in switchboard feeders, from Service to Test position and vice-a-versa, with door closed and without any movement of the feeder with respect to the structure of the switchboard.
BACKGROUND AND PRIOR ART
In present scenario power contacts of the switchboard feeder assembly are mounted on the feeder frame itself. Hence for movement of power contacts from one functional position "Service" to another functional position "Test", feeder frame itself is required to move with respect to switchboard structure. Also in present feeder system the door of the feeder is not integral with the feeder frame, but is hinged to the structure. Hence for the movement of the feeder frame the door is required to be opened up which can also violet ingredients protection. Also the operator may get exposed to any live component making the situation hazardous.
US5,680,926 deals with a mechanical interlock mechanism for operating an electrical wiring device with an electrical connector assembly. The mechanical interlock mechanism comprises an operating handle effectively locked by the interlock mechanism such that the handle cannot be rotated
2

to activate the switch and energize the terminals of the electrical connector.
In the existing technologies and the prior art no such mechanism for providing rotation motion preceding transitional linear motion has been found for providing safe mechanical interlocking while engagement and disengagement of power contacts without moving the feeder and with door of the assembly remaining in closed position.
In existing feeders door is not the part of feeder frame, but it is hinged onto the structure. Feeder frame is fixed to guide rails, which are mounted on the tray. Feeder frame is also attached to a nut fixed on the tray through a lead screw fixed into it. Also power contacts are fixed to the frame Hence, contacts cannot be moved keeping the feeder frame fixed. To move contacts to test position the whole feeder frame has to be withdrawn by rotating the lead screw The lead screw requires considerable number of rotations for the particular movement and takes time. Also lead screw is accessible only when the door is open. While removing the feeder frame contacts may get exposed to the user.
Thus there is a need to provide for a mechanism adapted to move and interlock power contacts, in switchboard feeders, from Service to Test position and vice-a-versa with safety without moving the feeder.
The present inventors have found that by way of providing plurality of slot profiles with unique constructions so as to provide appropriate rotational movement preceding transitional linear movement in the actuator means it is
3

possible to achieve mechanical interlocking in contactor system .
OBJECTS OF INVNETION
Thus one object of the present invention is to provide a mechanism for mechanical interlocking of power contact during engagement and disengagement of power contacts.
Another object of the present invention is to provide movement of power contact from Service to Test position and vice-a-versa.
Yet another object of the present invention is to provide movement of power contact with door in closed condition.
Another object of the present invention is to keep feeder static with respect to the structure of switchboard.
Yet one more object of the present invention is to provide higher level of safety during movement of the power contacts.

The other object of the .present invention is to provide quick and easy operation.
SUMMARY OF INVENTION
According to one aspect of the present invention there is provided a mechanism adapted to move and interlock power contacts in switchboard feeders, said mechanism comprising
4

feeder frame means;
modular section operatively located inside the feeder frame and engaged with an actuating means located outside the frame, wherein said modular section comprises plurality of sections comprising rod means and hollow chamber means
wherein rod means comprising plurality of supporting element located on the rod at predetermined positions, said rod means being telescopically disposed in said hollow
chamber means
Wherein said hollow chamber means comprises plurality of slot means located on the chamber in a manner to co-operate With interlocking means operatively and movably located on feeder frame
wherein said slot means being angularly extended so as to provide desired rotation followed by transitional linear motions of rod means to move and interlock at desired positions required during operation of power contacts.
DETAILED DESCRIPTION OF INVENTION
In the mechanism of the present invention both male and female power contacts have transitional linear motion and a rotational movement for the defeat of interlock while they are being engaged or disengaged as in the previous case. The rotational movement always precedes transitional motion both while engagement and disengagement of power contacts.
5

Actuating means comprises a handle, which is the part of the mechanism projecting out of feeder door. This handle can be operated to achieve both above-mentioned rotational and transitional motion keeping the door closed. It
minimizes chances of the exposure of the any live components to the operator and also ingredients protection. Hence ensures the safety of the operator.
The handle is operatively engaged to modular section comprising rod means telescopically inserted in a hollow Chamber. The hollow chamber, which is barrel shaped comprises of plurality of slots having differently extended Angles. The rod means comprises plural supporting elements, hereinafter referred to as act pins which are disposed in

the slots.

BRIEF

DESCRIPTION OF ACCOMPANYING FIGURES

figure 1 illustrates overall isometric view of the mechanism of the present invention.
Figure 2 illustrates an exploded view of the mechanism of the present invention.
figure 3 illustrates a sectional view of barrel showing all
Slots. Enlarged views are illustrated in Detail 3A and
Retail 3B. Figure 3C illustrates the plan view of the
barrel.
figures 4a, 4b and 4c illustrates the sectional views of

the slots.
6

DETAILED DESCRIPTION OF ACCOMPANYING FIGURES

Figure 1 shows the overall view of the assembly. Mechanism is mounted in the feeder frame. Feeder frame consists of feeder frame and an integral door. Mechanism (8) is guided through the bush (1) mounted on the front face of the frame (2). Motion guides (9), are mounted in the feeder frame, over which Contact mounting back moves. Two numbers of latches (3) are used as interlocks in service and test positions. Latches are pivoted on the latch pin (5), which is fixed to the latch bracket (4) (also shown in the enlarged view Detail A) . Two latches (3) (also shown in the enlarged view Detail A) are assembled reciprocally in such a way that they are mirror of each other with respect to the axis of the latch pin (5). Both latches (3) are separated by latch sleeve (6) (also shown in the enlarged view Detail A). Latches (3) are preloaded with latch spring (7) . Latch springs (7) (also shown in the enlarged view Detail A) are torsion springs. Hence, latches (3) are rotated about the latch pin (5) against the force of latch spring (7).
Figure 2 shows details of mechanism (8) with its components in exploded condition. Handle (10) is fixed to rod (11) by two act pins (12) . Rod (11) is inserted into the barrel (13). Act pins (12) at Q, O, and P on the rod are trapped with slots at A, B, and C on the barrel (13) respectively. Barrel (13), mechanism (8) and slots at A, B and C are also 4hown in the enlarged view marked as Detail B.
7

Figure 3 reveals slots (A, B, & C) on the barrel (13) . Sectional views are shown in figures marked as Detail 3A and Detail 3B showing the horizontal line H. Slots (A, B & C) are circumferential. As shown is figures 4a, 4b and 4c slot at section A extends 90° in clockwise direction from the horizontal reference plane "H", slot at section B extends 90° in anticlockwise direction from the horizontal reference plane WH" and slot at section C extends 30° in clockwise direction from the horizontal reference plane
As shown in figure 3 rod (11) is free to rotate inside the barrel (13) through 30°. Power contacts (14) are fixed to Contact mounting back (15), which in turn is fixed to the other end of the barrel (13) through cylindrical insert (16) . Hence, any axial movement of the handle (10) will be transmitted to power contacts (14), which are mounted on Contact mounting back (15).
Working:!
Initially power contacts are in service position and top latch (3) is engaged with the slot at section A in the barrel, thus preventing the undesirable movement of the handle and power contacts. To move power contacts to the test position, handle is turned in clockwise direction to defeat the top latch. Rotating handle rotates the act pin, at section A in the barrel, which will force the top latch out of the slot at section A in barrel to free the axial movement of the handle. The movement of the handle in outward direction is imparted to power contacts. Hence, power contacts get disengaged and move relative to the
8

feeder frame. Movement continues till the bottom latch gets engaged with the slot at section B in the barrel. Engagement of the bottom latch with the slot at section B in the barrel prevents further travel of handle and thus ensures the arrival of test position.
For movement of power contacts from Test position to
service position, handle is turned in anticlockwise
direction to defeat the bottom latch. Rotating handle
Rotates the act pin, at section B in the barrel, which will force the bottom latch out of the slot at section B in
barrel to free the axial movement of the handle. The
movement of the handle in inward direction is imparted to
power contacts. Hence, power contacts move relative to the
feeder frame and engage with their counter part. Movement
Continues till the top latch gets engaged with the slot at
Section A in the barrel. Engagement of the top latch with
the slot at section A in the barrel prevents further travel
of handle and thus ensures the arrival of service position.
Advantages :
[1]. Withdrawal of power contacts from service to test position with door closed.
2. Interlocks to prevent accidental movement and distinguished positions.
3. Higher level of safety.
4. Increased ingredient protection level.
5. Quick and easy by simple push/pull operation.
9

The invention has been described in a preferred form only and many variations may be made the invention which will still be comprised within its spirit. The invention is not limited to the details cited above. The slots and angles herein described may be replaced by its technical equivalence and values and yet the invention can be performed. The latch spring described herein as torsion
spring can be any other springs and yet the invention can
Be performed. The structure thus conceived is susceptible of numerous modifications and variations, all the details may furthermore be replaced with elements having technical equivalence. In practice the materials and dimensions may be any according to the requirements, which will still be Comprised within its true spirit.
10

A mechanism adapted to move and interlock power contacts in switchboard feeders, said mechanism comprising
feeder frame means;
modular section operatively located inside the feeder frame and engaged with an actuating means located Outside the frame, wherein said modular section comprises plurality of sections comprising rod means and hollow chamber means
wherein rod means comprising plurality of supporting
element located on the rod at predetermined positions, said rod means being telescopically disposed in said
hollow chamber means
wherein said hollow chamber means comprises plurality of slot means located on the chamber in a manner to £o-operate with interlocking means operatively and movably located on feeder frame
wherein said slot means being angularly extended so as to provide desired rotation followed by transitional linear motions of rod means to move and interlock at desired positions required during operation of power contacts.
Mechanism as claimed in claim 1, wherein the supporting element comprises act pins.
11

Mechanism as claimed in claim 1, wherein said interlocking means comprises plurality of latch means including top latch and bottom latch provided pivotally in the feeder frame in a manner to operatively engage with slot means.
Mechanism as claimed in claim 3, wherein the top latch is in a reciprocal relation to bottom latch in a manner so as to rotate about a predetermined axis thereby accommodating in the slot providing interlocking.
Mechanism as claimed in claims 3 and 4, wherein the latch means are spring loaded adapted to rotate about the pivot against the force of latch spring.
Mechanism as claimed in any preceding claims, wherein Slot means comprises slot A, slot B and slot and slot
Mechanism as claimed in claim 6, wherein slot A .
Extends to approximately right angle in clockwise
direction, slot B extends to approximately right angle in anti-clockwise and slot C extends to approximately 30° in clockwise direction from horizontal frame of reference such that the rod is able to freely rotate through about 30°.
Mechanism as claimed in claim 1, wherein the actuating means comprises handle being engaged with the rod adapted to defeat the bottom latch in a manner such
12

that any rotational movement of the handle is transferred to transitional linear motion of the rod.
9. Mechanism as claimed in claim 1, where the chamber means further comprises cylindrical insert such that the power contacts move receiving corresponding motion of the handle.
10 A mechanism for moving and interlocking power contacts in switchboard feeders as herein substantially described and illustrated with reference to the Accompanying figures.

Coated this 5th day of February 2007
13

ABSTRACT
TITLE : MECHANISM FOR MOVING AND INTERLOCKING POWER CONTACTS
The present invention relates to a mechanism adapted to move and interlock power contacts in switchboard feeders. The mechanism comprises feeder frame means (2) . In the feeder frame (2) a modular section is located and engaged with an actuating means (10) located outside the frame. The modular section comprises plurality of sections comprising rod means (11) and hollow chamber means (13) . The rod means (11) comprises plurality of supporting element (12) and is telescopically disposed in said hollow chamber means (13) . Hollow chamber means (13) comprises plurality of slot means (A, B & C) located on the chamber (13) to co-operate with interlocking means (3) operatively and movably located on the feeder frame (2).
Figure 2

Documents:

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Patent Number

270540

Indian Patent Application Number

249/MUM/2007

PG Journal Number

01/2016

Publication Date

01-Jan-2016

Grant Date

30-Dec-2015

Date of Filing

09-Feb-2007

Name of Patentee

LARSEN & TOUBRO LIMITED

Applicant Address

L & T HOUSE, BALLARD ESTATE, MUMBAI

Inventors:

#	Inventor's Name	Inventor's Address
1	KHOKRALE, JANARDAN, DINKAR	SWITCHGEAR DESIGN & PRODUCT DEVELOPMENT CENTRE LARSEN & TOUBRO LIMITED, ELECTRICAL SECTOR-(EBG), POWAI WORKS (EAST),GATE NO.7, SAKI VIHAR ROAD, MUMBAI 400 072

PCT International Classification Number

H01R13/70

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA