Technical drawing for a Contact S, first used on a Foot Dipper Switch.
| Identifier | ExFiles\Box 165\1\ img049 | |
| Date | 21th May 1937 guessed | |
| FIRST USED ON FOOT DIPPER SWITCH MODEL TYPE REF. DRG. Nọ JOSEPH LUCAS LTD. B CASTING DRG. Nọ CASTING Nọ CONTACT S MATERIAL & SPECIFICATION. .020" THK PHOS BRONZE THIRD ANGLE PROJECTION. .687" +.010 -.000 .187" .161 DIA HOLE (Nọ 20 DRILL) IMPORTANT. AVOID SHARP EDGES AND CORNERS WHERE POSSIBLE THIS DRAWING MAY ONLY BE ALTERED IF THE PART REMAINS INTERCHANGEABLE FOR MUST BE 7° 12° .033 IN/R .020 IN/R 90° 50° .020 IN/R .031 .046 O {Mr Oldham} /R .328" .033 O {Mr Oldham} /R .125R +.003" | ||
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).