Patent GB-700361-A (GB)
Title: Controlling means for starting and stopping internal combustion engines
Inventor: SILK THOMAS HAMPSON
IPC: F02N11/08
Filed: 1950-11-16
Abstract: 700,361. Starting prime-movers. HAMPSON INDUSTRIES, Ltd. Sept. 27, 1951 [Nov. 16, 1950], No. 28029/50. Class 38 (4). [Also in Group XXVII] In apparatus for starting and stopping an engine 2 used for driving an electric generator 3 there is provided an arrangement of means contained in four parallel electric circuits (A), (B), (C), (D) consisting of (A) a starting relay s and a normally-open and a normally-closed switch d<SP>3</SP> and a<SP>1</SP> respectively, in series with the relay s ; (B) a stopping relay f and a normally-open switch b' in series therewith ; (C) a diode valve v, a pair of relays a, b in parallel with each other and in series with the valve anode, a two-way switch d<SP>1</SP> in series with the relays a, b, and a pair of normally-open switches b<SP>2</SP>, d<SP>2</SP> in parallel with each other and in series with the valve filament and (D) a relay d and a switch g<SP>1</SP> in series therewith. The engine 2 which drives the A.C. generator 3 is started by a separate electric motor (not shown) or by the generator 3 energized from the battery" 4, the latter either being charged by the generator 3 through a rectifier 10, a separate dynamo (not shown), or any other source. The starting motor is under the control of a normallyopen switch 6 which is closed by an electromagnet 7. To start the engine, the switch g' is manually closed so that the battery energizes the relay d which thereby moves switch d' to excite relay a and closes switches d<SP>2</SP> and d<SP>3</SP> whereupon circuit (A) is completed causing the energization of the relay s with consequent closure of switch s' whereby current flows through the electromagnet 7. After a given period, which depends upon the setting of a variable resistance r', the valve v conducts and relay a becomes operative and opens switch a<SP>1</SP> and thence stops the starting motor. To stop the engine 2 the switch g' is opened and relay d is de-energized so that switch d' closes the circuit over the relay b, and as current can still flow through the valve v, switches b<SP>1</SP> and b<SP>2</SP> are closed. Closure of switch b<SP>1</SP> excites the relay f and so closes a switch f<SP>1</SP> which energizes an electromagnet 8 that interrupts the fuel supply ; the closure of switch b<SP>2</SP> brings a variable resistance r<SP>2</SP> into action which resistance is adjusted to cause the valve v to seal after a given period. In the generator load circuit l is a manually-operable switch h which upon closure energizes a relay g through a rectifier t and a choke or transformer q in the load circuit, the relay g automatically closing switch g<SP>1</SP> arid so starting the foregoing sequence of starting operations ; stopping as described above is effected by opening switch h. The load circuit also includes a normally-open switch m operable by an electromagnet n energized by the generator ; in association with switch m is a normally-closed switch o which controls a branch circuit p connected across switch g' and so connects the battery to the above auxiliary circuits associated with the load circuit l. When the engine is of the kind which is started by compressed air the electromagnet 7 actuates an air valve instead of the switch 6.