3 Nov 2013
what's Inside Telephone
3 Nov 2013
Tags:
how
Today, we will see how a Rotary Telephone works
1. Dial
A circular face made of transparent plastic and perforated with figures-sized holes, the dial is turned by the caller to key in a number. The dial runs from 0-9 and typically rotates clockwise
2.Body
The body is faced with the dial mechanism and contains the core components of the system. It is generally made of molded plastic like Bakelite, through early units were build from wood and metals.
3.Switch
This electrical contact dictates the phone’s pulse generation. When a user keys in a number, the movement of the dial forces the contact to open and close to create a specific number’s dialing pulse.
4.Bell
When an incoming call is awaiting connection, a brace of mechanical bells at the body are struck by a hammer to produce a ringing noise. Once the handset is lifted, the hammer is disengaged.
5.Receiver
As with a modern phone, the user speaks through a handheld receiver, with the handset comprising both receiver and transmitter ends. When resting on the phone cradle, the line is in a receptive state.
6.Recoil spring
As the dial needs to be rotated a number of times, it connects to a spring. This returns the dial to its starting point and moderates its movement speed and the switch position via a governor
Like me, Many of you might have an interest in older technologies.
so though to share some technical knowledge about this Rotary Telephone
so though to share some technical knowledge about this Rotary Telephone
1. Dial
A circular face made of transparent plastic and perforated with figures-sized holes, the dial is turned by the caller to key in a number. The dial runs from 0-9 and typically rotates clockwise
2.Body
The body is faced with the dial mechanism and contains the core components of the system. It is generally made of molded plastic like Bakelite, through early units were build from wood and metals.
3.Switch
This electrical contact dictates the phone’s pulse generation. When a user keys in a number, the movement of the dial forces the contact to open and close to create a specific number’s dialing pulse.
4.Bell
When an incoming call is awaiting connection, a brace of mechanical bells at the body are struck by a hammer to produce a ringing noise. Once the handset is lifted, the hammer is disengaged.
5.Receiver
As with a modern phone, the user speaks through a handheld receiver, with the handset comprising both receiver and transmitter ends. When resting on the phone cradle, the line is in a receptive state.
6.Recoil spring
As the dial needs to be rotated a number of times, it connects to a spring. This returns the dial to its starting point and moderates its movement speed and the switch position via a governor
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