DESCRIPTION OF COMPONENTS

1. DIAL

It is a circular plastic disc with small circles cut along its periphery , through the finger can be passed to actuate the diallling. The sheet of numbers is pasted to the base below it , which remains fixed.

2. MAIN GEAR

It is directly connected to the shaft on which the dial is mounted and essentially transmits to the rotation of the dial to the internal dialling mechanism. It has two small projections, the pushers; and has 66 teeth.

3.DIALLER SPRING

It is a torsion spring which is connected between the dial and the base. It is this spring which results in the return of the dial once a digit has been dialled.

It further provides a limit to the dial by becoming tightly wound around the shaft.

4. TRANSMISSION GEAR

It is a system of two gears mounted on a single shaft. The smaller one acts as the pinion to the MAIN GEAR while the larger transmits this motion to the CAM GEAR and the REDUCER GEAR.The pinion has 11 teeth and the gear has 64 teeth. .

5.CAM GEAR & PLUGGER

The cam gear consists of a gear and a cam on acommon shaft. The gear meshes with the TRANSMISSION GEAR while the cam transmits the pulse motion to the electrical contacts.

The plugger manifests itself in holding one of the electrical plates fixed, so that the motion of other would lead to an alternating loss and maintenance of contact. The cam gear has 28 teeth.

6. ELECTRICAL LEAVES

The electrical leaves are in the form of leaf springs, which under normal conditions stay together. One of these is in contact with the cam of the CAM GEARand thus moves in accordance with it .

7. REDUCER GEAR

It consists of two separate half discs which are joined together by a crossbar , which allows the discs to be separated.Thsese are held together by a spring .This arrangement accomodates one of the reducer gear which transmits motion to & from the reducer.The reducer is enclosed within a circular ring, the inside of which is metallic.The reducer gear has 16 teeth.

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