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).
Patent specification for improvements in or relating to carburetors for internal combustion engines or motors.
| Identifier | ExFiles\Box 1\7\ B001_X15 20 46 50 59-page285 | |
| Date | 13th September 1918 | |
| Godward Carburetter. No 3 118,861 PATENT SPECIFICATION Application Date, June 13, 1917. No. 8458/17. Complete Accepted, Sept. 13, 1918. COMPLETE SPECIFICATION. Improvements in or relating to Carburettors for Internal Combustion or Explosion Engines or Motors. (Communicated in part to EDWARD BEHENNA TREDWEN, Merchant, of 9, Bishopsgate, London, E.C., by ERNEST ROBERT GODWARD, of Don Street, Invercargill, New Zealand.) We, ALFRED JAMES JUNG, Engineer, of 7A, Princes Street, Westminster, London, S.W., and EDWARD BEHENNA TREDWEN, Merchant, of 9, Bishopsgate, London, E.C., do hereby declare the nature of this invention and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statement:— This invention relates to carburettors for internal combustion or explosion engines or motors and refers to carburettors such as described in the Specification of British Letters Patent No. 102,043, which comprise an expansion chamber lined throughout with absorbent material and expanding towards the induction pipe from the inlet for the fuel mixture, the liquid being drawn into the chamber through a nozzle and the air through a valve formed by a wire coil, which is expanded by the engine suction in accordance with requirements. The expansion chamber comprises an inner and an outer tubular member of different diameters and a movable bell placed intermediate of these two and the air control valve is in the form of a conical coil spring which hitherto has been a close fit against the liquid supply nozzle and the inner tube and the liquid has been drawn from a float chamber through a conduit communicating with the nozzle. As hitherto constructed no air can enter the carburettor through the spring valve until or unless the engine suction is strong enough to expand the coil and separate its convolutions thus necessitating a comparatively light spring being employed and a light construction of movable bell. The petrol or liquid supply has also been faulty as an equal level between the liquid in the float chamber and the nozzle is not always maintained. Furthermore the members of the apparatus have been assembled or secured in relative position in such a manner that they cannot be taken apart readily for inspection, cleaning or replacement. It is the chief objects of the present invention to increase the efficiency or capacity of the apparatus and improve or simplify its construction. According to the present invention, provision is made for the inlet of air to the expansion chamber before the engine suction is strong enough to expand the spring valve, conveniently by so constructing the spring that there is a space at all times between it and the nozzle or tube which it surrounds and the petrol supply is controlled by a valve which also allows air to enter to maintain the liquid in the nozzle at a level equal to that in the float chamber. The parts of the carburettor are detachably assembled and secured in position by [Price 6d.] | ||