From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Table for the gap adjustment specifications for a duplex push button switch.
Identifier | ExFiles\Box 64\4\ scan0308 | |
Date | 28th June 1929 | |
X7655 28.6.29. X.7656. DUPLEX PUSH BUTTON SWITCH. TABLE FOR GAP ADJUSTMENT. Position Button depression. Copper gap. Carbon gap. Off A + .000 .065 +12 -10 .025 +15 Carbons in contact. A+.014+8 .045 -10 0 Coppers in contact. A+.046 +8 -7 0 0 where A = initial button depression which should be .012" In the above table the two quantities underlined are considered to be the "basic" gaps i.e. those which are set in the initial adjustment of the switch. The other gaps are dependent quantities and are given merely as a check on the adjustment of the switch. EFC. | ||