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).
Report from Claremont Haynes & Co. detailing outside patent searches.
| Identifier | ExFiles\Box 147\4\ scan0030 | |
| Date | 1st August 1940 | |
| additional OUTSIDE PATENT SEARCHES. REPORT BY CLAREMONT HAYNES & CO. Week ending 1st August 1940. SPECIFICATIONS which have become available prints of which are not sent herewith, but which may also be of interest. (Opposition date 16th September 1940) No. Patentee. Title. 522,998 H.R.Ricardo Springs for poppet valves of engines, compressers, or the like. Two or more coil springs are used having ends extending axially and moveable in planes normal to the axis of the coils, and maintained in alignment by members inside the coils of a radial size to prevent coils binding upon them. 523,029 British Thomson Ignition systems for Houston Co.Ltd. internal combustion and K.J.R.Wilkinson. engines. For an ignition system in which a series condenser is provided in the circuit supplying the spark plug or plugs. An ohmic resistance is connected between the output side of the condenser and the earth return in order to remove residual charges which would otherwise form on the condenser. 523,030 V.Rappoport Incandescent ignition plugs for internal combustion engines. | ||