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).
Installation instructions and features for the Autopulse fuel system.
| Identifier | ExFiles\Box 41\1\ Scan032 | |
| Date | 30th November 1926 guessed | |
| PAGE 6 make of vehicle. Does away with pipes, tanks, gauges, hand pumps and "cleans up the job." Space required is small. 12. Operates efficiently, safely and without friction in any position, even bottom side up. 13. No lubrication or adjustment required during the life of most vehicles. No "wearing parts" in contact with gasoline. No piston to wear, stick, freeze or leak. 14. Operates upon an inconsiderable amount of power and battery current, and its operating principle insures a build-up of power to overcome restrictions. 15. Functions under "cold starting" conditions when there is sufficient "battery" to operate either starter or ignition. 16. Lends itself to handy replacement service. About as easily serviced and as handy to carry as a SPARK PLUG. 17. The AUTOPULSE unit, except for the different ranges of voltage, is the same for all installations. Larger engines are supplied by several units manifolded. 18. In "MULTIPLE" INSTALLATIONS, each unit functions entirely independent of the others; but each automatically delivers its proportion of the fuel at all times. 19. The LIFE of the AUTOPULSE unit is long and the FACTOR OF SAFETY IN OPERATION IS HIGH; but BOTH OF THESE IMPORTANT FEATURES CAN BE MULTIPLIED to any extent desired by the plural use of the unit independent of the capacity required. 20. No waste life, no waste power, pumps only the fuel required; but this it will do to the FULL EXTENT OF ITS CAPACITY, instantly, upon demand. It has a reserve, over the rated capacity, sufficient to overcome possible air or valve leakage and gradual deterioration during its life. INSTALLATION 21. The AUTOPULSE can be installed by any unskilled person with ordinary hand tools and stock fittings upon any type of engine having a carburetor with a float valve and a battery, either "dry" or "storage" of suitable voltage. (See note page 5.) It may be inserted into the fuel supply pipe at any convenient location, preferably at the same level as, or near the carburetor, with the opening "C" to the carburetor and "T" to the supply tank. Its upright position is as shown in the illustrations. The AUTOPULSE should not be installed in proximity to exhaust pipes or manifolds and suction pipe should not be in contact with exhaust pipe. Select a location as cool and as accessible as is practical. 22. The AUTOPULSE, when pumping fuel, CANNOT BE HEARD by the driver of an automobile, if mounted upon the carburetor, engine or chassis frame. It can be heard when installed upon the dash. For this reason, principally, dash installation is not recommended. The dash acts as a sounding board and magnifies the sound and every stroke can be heard quite clearly. 23. When the AUTOPULSE is used to REPLACE THE VACUUM FEED SYSTEM, the tank should be entirely disconnected from the carburetor or suction line. 24. The AUTOPULSE will supplement the AIR PRESSURE or GRAVITY feed systems. In both cases it is inserted into the delivery line near the carburetor. In gravity feed systems it acts as a "booster" and will deliver fuel upon grades, irrespective of the height of the fuel in the supply tank. The SUPPLY TANK MUST BE VENTED in the case of PRESSURE FEED SYSTEMS. This is usually done by removing the filler pipe gasket. The air pressure system can be used as an emergency supply by closing the "vent" and allowing the air pressure to build up. 25. THE MOUNTING OF THE AUTOPULSE UNIT UPON THE CARBURRETOR is recommended for new and suitably designed equipment. PAGE 7 The openings at "T" and "C" are threaded for ⅛" pipe standard. Vehicle producers should specify ⅛" standard pipe thread upon the pipe connection which is usually bolted to the carburetor. The No. 268 adapter fitting may be screwed into the AUTOPULSE to the correct position for upright mounting and the AUTOPULSE may then be bolted to the carburetor bowl, as shown in the illustration upon the cover. In replacement installations, the size and design of connection varies and the equipment may not have sufficient supporting strength; therefore, the mounting of the AUTOPULSE upon the carburetor cannot be generally recommended. It should, however, be located as near the carburetor as is practical and at the same or within three or four inches of the level of the carburetor fuel connection. (See last paragraph of Technical Explanation). 26. Adapter No. 268 for CARBURETOR MOUNTING of the AUTOPULSE UNIT, having a ⅛" pipe thread externally and a ½"-20 thread and a seat internally for attaching to a 5/16" "flared tube" connection, is carried in stock. In the cover illustration showing the AUTOPULSE attached to the carburetor, this coupling is used. The coupling is first seated, "gasoline-tight" upon the carburetor connection, and this combination is screwed into the AUTOPULSE "gasoline-tight" and in the proper position for upright mounting. A large proportion of the carburetors in use are fitted with the 5/16" "flared tube" connections, and it is carried as a standard part by nearly all carburetor manufacturers. 27. Caution: A ⅛" pipe thread connection of cast brass should not be used between the AUTOPULSE and the carburetor for support of the AUTOPULSE, as it may not have sufficient strength. 28. MOUNTING BRACKETS are available (See illustration) for mounting single unit AUTOPULSE, one for attaching to a vertical and another to the edge of horizontal surfaces. The AUTOPULSE is assembled with the bracket by screwing a tapered or pipe threaded nipple into the "C" outlet of the pump and the bracket until the joint is "gasoline-tight" and in a position for upright mounting. The internally threaded bosses are provided for one-eighth-inch pipe fittings and for tube connection to the carburetor. If its position is not convenient for connection, a half turn of the bracket in the pump will change its position and direction. BRACKETS ARE NOT FURNISHED UNLESS SPECIFIED with the single unit. 266 Horizontal Surface Bracket 267 Vertical Surface Bracket 268 Adapter Coupling 258 Nipple 29. The WIRE CONNECTION is made upon the battery terminal of the ignition coil or upon the ignition switch or anywhere upon the wire connecting these two points, upon vehicles having "battery ignition." Other installations should have a separate switch to control BATTERY current to the pump. The return circuit is "grounded" and is connected to the battery through the pipes and engine. When the engine circuit is not "grounded" or two wire system is used, special fittings for insulation can be furnished when specified. Electrical connections should be well and positively made. 30. Note: The voltage rating marked upon the top of the AUTOPULSE should correspond with the ignition voltage if connection is made to the ignition switch. If battery ignition is not used, a separate switch should be provided to control the AUTOPULSE and the circuit made so that the AUTOPULSE current will flow through the ammeter. A pump marked (6V) can be used upon a battery of any voltage, if a tap is taken off at 3 cells (storage type) from the "grounded" side of the battery. 31. The FUEL PIPE recommendations are as follows: For single UNIT installation, full capacity, 5/16" tubing. For single UNIT installations, where the capacity | ||