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what's Inside Telephone

3 Nov 2013
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Today, we will see how a Rotary Telephone works
Like me, Many of you might have an interest in older technologies.
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


               You can collect more information about Rotary telephone from wikipedia

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Today, we will see how a Rotary Telephone works Like me, Many of you might have an interest in older technologies. 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                You can collect more information about Rotary telephone from wikipedia