Letter from W.G. Pye & Co. proposing an alternative design for a testing instrument for Rolls-Royce.
| Identifier | ExFiles\Box 34\1\ Scan310 | |
| Date | 10th August 1922 | |
| Telegraphic Address: PYE, CAMBRIDGE Telephone: CAMBRIDGE 314 W.G. PYE & CO. Makers of Physical & Electrical Apparatus for Teaching. Instruments of Precision for Commerce & Research. Contractors to BRITISH, COLONIAL, AMERICAN & FOREIGN GOVERNMENTS & UNIVERSITIES THROUGHOUT THE WORLD "Granta Works," Montague Road, CAMBRIDGE, ENG. PARTNERS { W.G. PYE. T.A.W. ROBINSON. } YOUR REFERENCE Wd {Mr Wood / Mr Whitehead} 4/NJ 4822. OUR REFERENCE TAWR/JH 151. August 10. 1922. CODES USED: - A.B.C. 5th Edit. Western Union. [STAMP: NATIONAL SCHEME FOR DISABLED MEN] Messrs. Rolls-Royce Ltd., Nightingale Road, DERBY. [Handwritten: E7C4/T3822] Dear Sirs, We duly received your memo of the 4th inst. and have fully considered the Testing Set to which you refer. Your suggestion re the direct reading Ballistic Galvanometer would not be suitable as to make an instrument sensitive enough it would be very fragile and unreliable. We suggest a direct reading Bridge, supplied with alternating current from the secondary of a small Induction Coil, the primary of which can be operated from the 12 Volt Battery as you state, or from a Dry Cell. The range of the instrument with 3 Dials would be from 1 to .001 m.f.d.; differences of .001 m.f.d would be easily detected and the instrument would be robust. We enclose herewith a diagram of the circuit proposed, and please let us have your remarks re same. When replying please let us know if you prefer to use the 12Volt Battery as originally suggested or the Dry Cell. We will quote upon receipt of your further memo. Yours truly, p.p. W.G. Pye & Co. [Signature] Partner. [STAMP: RECEIVED AUG 11 1922 R-R C Ld] [Left Column] HOW TO FIND US. [Map with text: CHESTERTON ROAD, Bus Terminus Service 1. From Station, W.G. PYE & CO Granta Works] Specialities: "Grania" Patent Extensometer " Galvanometers " Dial Resistances " Potentiometers " Dial Bridges " Shunts " Potential Dividers " Dolezalek Electrometers Du Bois Electro-Magnets Hibbert's Magnetic Standards Travelling Microscopes Cathetometers Telescopes Aldis Three-Sphere Spherometers Searle's Physical Apparatus Wilberforce Galvanometers " Potentiometers Rayleigh Synchronous Motors Large Tuning Forks for Timing Recording Cylinders Robinson's Patent Centrifugal Force Machine Platinum Thermometer Bridges Bragg's X-ray Spectrometer | ||
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).