ATM TELEPHONE T.1122 & T.1123

 


MINE TELEPHONES AND SIGNALLING APPARATUS
MAGNETO TELEPHONE
Wall Pattern - with Hand Micro-telephone

T.1122
Polished wood case with hinged front, making for maximum accessibility.  Front secured by two captive screws.  High resistance; screened ringer with special gong adjustment; detachable switch-hook.  Hand micro-telephone with convenient curved grip, supporting capsule-type microphone and hygienic mouthpiece.  Two-pole receiver, 65 ohms resistance.

The generator has a double cut-out, and is wound to 500 ohms.  An induction coil and internal terminals for connecting the lines and battery complete the equipment.

Height, 9.5ins. width, 6.75ins. depth, 5.75ins.
Weight, 11 lbs.
MAGNETO TELEPHONE
Wall Pattern - with Separate Transmitter and Receiver

T.1123
Similar specification to T.1122 above, but fitted with capsule microphone, mounted on front of case, and separate two-pole receiver of 65 ohms resistance.

Dimensions and weight as T.1122.


Taken from the ATM Mine Telephones and Signalling Apparatus Catalogue 1928

 
 
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Last revised: October 06, 2012

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