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).
Product leaflet for the H.C. Vapour-proof Precision Switch, detailing its components and different types.
| Identifier | ExFiles\Box 168a\2\ img362 | |
| Date | 1st October 1937 guessed | |
| THE H.C. VAPOUR-PROOF PRECISION SWITCH (PATENTS PENDING) TYPE A1. Normally Closed. TYPE A3. Single Pole Double Throw. 1 Laminated Bakelite Plunger. 2 Hole for Fixing Screw. 3 Beryllium Bronze Diaphragm. 4 Silver faced Copper Contacts. 5 Vapour-proof Contact Chamber. TYPE A2. Normally Open. (See Prices overleaf) Manufactured in U.S.A. for the SOLE BRITISH AND EUROPEAN AGENTS INTERNATIONAL TECHNICAL DEVELOPMENTS LTD. "I T D" THAMES HOUSE, MILLBANK, LONDON, S.W.1. | ||