CLOCK No. 4A & 4B | ||||||||
| P.O. ENGINEERING DEPT ENGINEERING INSTRUCTIONS MISCELLANEOUS TIME B 1329 Issue 2, 29.12.49 ELECTRICAL CLOCKS - IMPULSE TYPE 1. Description 2. Earlier models of Clocks No. 4A are fitted with circular wooden cases, mahogany
finished. The circular type clocks will continue to be supplied as long as they are available. This clock was originally provided at manual exchanges
with from 3 to 10 positions ultimately. Diagram - GMT14. This clock was superseded by Clock No. 64A Circular Model
The above clock was made by Gillett & Johnson and dated
1932
Octagonal Model
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Last revised: January 16, 2025FM2 |
Clock No.
4A, which supersedes Clock No. 4, is a 12 inch, wall-type clock for general purposes. It is fitted with a movement as described in B1311 and is operated by
half-minute impulses (Class A). It has an octagonal moulded synthetic-resin case, and the general appearance is shown
to the right. The oases are constructed on substantial lines, but synthetic-resin mouldings have naturally less resistance to shock than the more conventional wooden cases; care should therefore be exercised in handling them.
