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).
Specification table for a push button switch showing various gap measurements and button depression values.
Identifier | ExFiles\Box 34\3\ Scan030 | |
Date | 2nd August 1919 | |
R.R. 226A (100 T) S.H. 798. 10-18-20. G 2247 X 2641 2.8.19. X.1627. PUSH BUTTON SWITCH. X.2641. Position. Carbon. gap. Copper gap. Button depression. Off .040±15 .060±20 0 Carbons just in contact. 0 .033±10 .020±7 Coppers just in contact. 0 0 .045±15 (total) EFC. | ||