FORM 2
THE PATENTS ACT, 1970
(39 OF 1970)
As amended by the Patents (Amendment) Act, 2005
&
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2006
COMPLETE SPECIFICATION
(See section 10 and rule 13)
TITLE OF THE INVENTION
A device for wire twisting
APPLICANTS
Crompton Greaves Limited, CG House, Dr Annie Besant RoaS Worli, Mumbai 400 030, Maharashtra, India, an Indian Company
INVENTORS
Dixit Pankaj Kumar & Gajjar Pinkal Kishorlal; both of Crompton Greaves Ltd, Baroda Lamp Works, Kural Village, Padra Jambusar Road, Dist. Baroda-391430, Gujarat, India, both Indian Nationals.
PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the nature of this invention and the manner in which it is to be performed.

FIELD OF INVENTION
This invention relates to the field of automation devices.
Particularly, this invention relates to the field of automation electromechanical devices.
Still particularly, this invention relates to a device for wire twisting.
BACKGROUND OF INVENTION
Twisting more than one wire is typically done by hand twisting or dry soldering its ends after twisting. In case of hand twisting, if there is mismatch in pressure or number of turns rolled; the wire may either break or unwind. This leads to failure in the equipment in which the wires are used. Typically, almost all electrical equipment are internally joined through wires. To connect two parts of a circuit in any equipment, the lead out connecting wires are joined through twisting. The twisting not only joins two equipment but also makes a connecting channel for flow of current.
Typically, several equipment are available for twisting wires but are generally rudimentary and inefficient. In the manufacturing units, where mass production takes place, there is a need for an intelligent and efficient twisting device. Typically, in manufacturing process, hand twisting process is preferred; but at the same time the involvement of man power is much high. If the twisting of wire is not precise, it results in several disadvantages such as short circuit, current passing in the equipment, failure of the equipment because of small fault and the like.

Further, in the proposed use, the wires to be twisted are of relatively small length.
In conventional method of CFL assembly, there is a need to twist the two CFL capsule wires with each electronic Ballast. This process is done by the operator manually with the help of his fingers. Here the quality of twisting is not up to the mark and probability of going bad contact/loose twisting is more.
To overcome these and several other disadvantages, the proposed invention is disclosed herewith.
PRIOR ART
US Patent 4782578 discloses a pneumatic wire stripping and twisting mechanism. This mechanism performs the simultaneous task of stripping insulation off the wires while twisting them.
However, the mechanism is a complex one, in that, it uses at least 3 pneumatic cylinders and a plurality of drives. Further, the twisting mechanism is located at an interior location, thereby necessitating the use of a pre-determined (long) length of wire in order to facilitate its twisting. In micro-electronics or in the cases of CFL circuits, the wires are small, and cannot exceed a certain length. Such a mechanism, if used for twisting, results in breakage of peripheral electrical components. Also, a simple twisting mechanism is desired.

OBJECTS OF INVENTION
An object of the invention is to provide a device for wire twisting, which device works on smart and intelligent input with minimal human intervention.
Another object of the invention is to provide a device for wire twisting, which device is an improved device for twisting two or more wires to remove any tendency of the wire to unwind.
Yet another object of the invention is to provide a device for wire twisting, which device is easy to operate to increase productivity.
Still another object of the invention is to provide a device for wire twisting, which device reduces the product failure rate due to unwinding of wire to negligible.
An additional object of the invention is to provide a device for wire twisting, which device is adapted to receive relatively shorter lengths of wire.
Yet an additional object of the invention is to provide a device for wire twisting, which device eliminated undue or unwarranted stress on wires during twisting.

Still an additional object of the invention is to provide a device for wire twisting, which device does not tamper with or affect associated electrical components placed near to the wires being twisted.
SUMMARY OF THE INVENTION
According to this invention, there is provided a device for wire twisting, said device comprising:
a. pair of hinged jaws for receiving at least a pair of wires, said jaws
adapted to operate about said hinge in order to clamp and unclamp
said at least a pair of wires;
b. spring, placed between said jaws, adapted to retract jaws into said
clamped position;
c. pneumatic cylinder adapted to operate said pair of jaws between
their naturally clamped position by virtue of spring tension and
their spaced apart position to receive said at least pair of wires; and
d. drive motor adapted to connected to at least one of said jaws in
order to rotate said jaw along its longitudinal axis, thereby twisting
the grasped wires.
Typically, said jaw includes an operative distal end comprising teeth to hold said at least a pair of wire and twist them.
Typically, said device includes a wire sensing means adapted to sense loading of wires between said jaws and further adapted to actuate said pneumatic cylinder for clamping said jaws upon sensing placement of
wires.

Typically, said spring is a compressed spring attached at an operative inner side of said jaws.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The invention will now be described in relation to the accompanying drawings, in which:
Figure 1 illustrates a schematic of the device for wire twisting.
DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS
According to this invention, there is provided a device for wire twisting. Figure 1 illustrates a schematic of the device (100) for wire twisting
In accordance with an embodiment of this invention, there is provided a pair of jaws (12) for receiving at least a pair of wires (13).
In accordance with another embodiment of this invention, there is provided a pneumatic cylinder (14) adapted to operate said pair of jaws. Typically, the operation relates to opening the jaws from their naturally clamped position.
The wire twisting jaws are interconnected through a hinge (16). One end of jaw includes teeth to hold the wire and twist. The hinge serves as the fulcrum about which the jaws open and close.

In accordance with yet another embodiment of this invention, there is provided a spring (18), located between said pair of jaws, adapted to retract jaws to its naturally clamped state. The pneumatic cylinder exudes a force to work against the spring tension, thereby allowing the jaws to unclamp.
The plurality of jaws having a compressed spring attached at two internal ends of the jaws. The pneumatic cylinder is further connected with a wire sensing means.
In accordance with an additional embodiment of this invention, there is provided a wire sensing means (20) adapted to sense loading of wires between the teeth of the jaws.
At the time of operation, when two or more wires are brought in the range of the device, the wire sensing means get activated and sends a signal to pneumatic cylinder. The pneumatic cylinder, after receiving the signal, strokes other end of the wire twisting jaw. At the time of stroke, the tension inside the spring attached at the inner side of the jaw releases making the spring to expand.
During the expansion stage of the spring, one end of the jaw opens up providing a space to allow entry of said two or more wires to be twisted. At the next stroke, the pneumatic cylinder releases its pressure. The wires after entering gets fixed between said teeth of the jaws.

In accordance with yet an additional embodiment of this invention, there is provided a drive motor (22) adapted to connected to at least one of said jaws in order to rotate said jaw along its longitudinal axis, thereby twisting the grasped wires.
As soon as the wires get fixed inside the jaws, the drive motor gets activated and it starts rotating the jaws along with the wires. The rotation of the jaws creates twisting in wire, which is reliable, strong and efficient.
While this detailed description has disclosed certain specific embodiments of the present invention for illustrative purposes, various modifications will be apparent to those skilled in the art which do not constitute departures from the spirit and scope of the invention as defined in the following claims, and it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.

We claim,
1. A device for wire twisting, said device comprising:
a. pair of hinged jaws for receiving at least a pair of wires, said jaws
adapted to operate about said hinge in order to clamp and unclamp
said at least a pair of wires;
b. spring, placed between said jaws, adapted to retract jaws into said
clamped position;
c. pneumatic cylinder adapted to operate said pair of jaws between
their naturally clamped position by virtue of spring tension and
their spaced apart position to receive said at least pair of wires; and
d. drive motor adapted to connected to at least one of said jaws in
order to rotate said jaw along its longitudinal axis, thereby twisting
the grasped wires.
2. A device as claimed in claim 1 wherein, said jaw includes an operative distal end comprising teeth to hold said at least a pair of wire and twist them.
3. A device as claimed in claim 1 wherein, said device includes a wire sensing means adapted to sense loading of wires between said jaws and further adapted to actuate said pneumatic cylinder for clamping said jaws upon sensing placement of wires.

4. A device as claimed in claim 1 wherein, said spring is a compressed spring attached at an operative inner side of said jaws.