Dial Document Links
These documents are in PDF format
AEI Ltd:
Instructions for maintaining and repairing Dials No. 20
, 1956 (extremely comprehensive).
Aitken: extracts from his book
Automatic Telephone Systems
(1921) concerning
Dials
.
Automatic Electric:
Maintenance and repair of type 24a36 dial
.
British Post Office: Dial No. 3 - Siemens Brothers Patent in Montreal -
Description
-
Claims
-
Drawings
British Post Office:
Educational Pamphlet 5/1
'Telephone Dials' (training text).
British Post Office: Engineering instructions
A3118
(Dial No. 20),
A3215
(storage of Dial No. 30),
B1003
(dials in general).
Dial No 24 (American) -
Operation and maintenance
.
Commonwealth of Australia:
Dials in use in 1929
.
Ericsson Telephones Ltd:
Advertisement
for dials (mid-1950s)
Ericsson Telephones Ltd: Trigger Dials N19877, N4381, N4383A, N43941A (Ericsson/Plessey
Works drawings
).
GEC Ltd:
Catalogue leaflet
DSL1a for Dial No.20, late 1950s.
USA: article on
Dials used in North America
by Bruce Crawford.
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Last revised: March 31, 2023
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