TELEPHONE No. 4

Candlestick telephone with no dial aperture.

Standard CBS No. 1 table telephone if used with Bellset No. 5.
Standard CBS No's 2 & 3 table telephone if used with Bellset No. 15.

Fitted with Transmitter No. 2 and insert No. 3.  This transmitter could be rotated, to stop the carbon granules from packing, which was a well known fault with fixed transmitters.

There was also a Telephone No. 4A. This had a plug ended 4 wire line cord instead of a screw type block terminal with six wire connecting cord.

This was the standard telephone instrument arranged for standing upon a table. Since this telephone is simply a transmitter, a receiver, and a gravity switch, the instrument is not complete, and a separate  hand generator is provided, usually fixed to the desk or table in close proximity to the table telephone; the induction coil and magneto bell, with the condenser (should one be required), are fitted in a case and are known as a Bell Set. The bell set for use with the telephone is Bell Set No. 5, if the condenser is not necessary, and Bell Set No. 15 if a condenser is required The bell set need not be fitted close to the telephone so long as it is within audible distance of it. The primary battery is placed in a battery box and fitted close to the bell set to which it is connected.

Circuit diagram - Web users click here - CD users click here

See also the Telephone Efficiency Committees Report on Local Battery Area telephones.

Telephone No. 4 Diagram paster.

Last revised: June 16, 2007

FM