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).
Quotation from The British Thomson-Houston Company for Selsyn transmitter and receiver units.
| Identifier | ExFiles\Box 95\1\ scan0305 | |
| Date | 27th May 1936 | |
| 2. FHL.665143 Messrs. Rolls-Royce Ltd. THE BRITISH THOMSON-HOUSTON COMPANY, LIMITED. 27th May 1936 The size S.1813, has a torque gradient of 1.1 oz.inches degree, and a pull out torque of 250 oz.inches approximately. The guaranteed accuracy in the case of the S.1406 is ± 1 degree absolute follow-up between transmitter and receiver. Greater accuracy than this can be obtained by calibration of particular pairs of units. The size 1406 can be wound for voltages up to 250, single phase, 50 cycles, this being the standard winding. The standard machine is foot mounted, but flange mounting could be provided if absolutely necessary, at an increased price. The S.1406 and S.1813 selsyns incorporate an inertia damper which reduces the oscillation time to a minimum of 2/2-1/2 seconds. Our quotation for the standard units is as follows:- Type S.1406 Selsyn Transmitter for 230 volt 50 cycle supply, foot mounted, with standard bare shaft extension. PRICE each ---------- £5.10. 0 each Nett Type S.1406 Selsyn Receiver for 230 volt, 50 cycle supply, foot mounted, with standard bare shaft extension. PRICE each ---------- £5.10. 0 " " Type S.1813 Selsyn Transmitter for 230 volt, 50 cycle supply, foot mounted, with standard bare shaft extension. PRICE each ---------- £9. 5. 0 " " Type S.1813 Selsyn Receiver for 230 volt 50 cycle supply, foot mounted, with standard bare shaft extension. PRICE each ---------- £9. 5. 0 " " Cont'd... | ||