US1317806A - Best available cop t - Google Patents

Description

A. H. MIDGLEY.-

ELECTRIC STARTER FOR INTERNAL COMBUSTION ENGINES.

APPLICATION mso 050.18. ms.

1,317,806. Patented Oct. 7,1919.

3 SHEETS-SHEET l.

M 101mm A. H. MIDGLEY.

ELECTRIC STARTER FOR INIERNAL COMBUSTION ENGINES.

APPLICATION FILED DEC.1B.' I918.

1 Patent-ed Oct. 7,1919.

3 SHEETS-SHEET 2 INVE I AT TORNI-IY AJ H. MIDGLEY.

ELECTRIC STARTER FOR INTERNAL COMBUSIION ENGINES.

'APPUCATiON men DEC. 1:: I918.

Patentii Oct. 7, 1919.

3 SHEETS-SHEET 3 \T TORNEY IE1 E 15.

BY am Acton Vale, inthe county of UNITED STATES PATENT OFFICE.

ALBERT HENRY MIDGLEY, OF ACTON VALE, ENGLAND, ASSIGNOB OF ONE-HALF To C. A. VANDERVELL 8c COMPANY LIMITED, 0F ACTON VALE, MIDDLESEX, ENGLAN D.

ELECTRIC STARTER FOR INTERHAL-GOMBUSTION ENGINES.

To all whom it may concern:

Be it known that I ALBERT HENRY MIDG- LEY, subject of the Iiing of Great Britain and Ireland, and residing at War 1e Way,

Biiddlesex, England, have invented certain new and useful Improvements in and Relating to Electric Starters for Internal-Combustion Engines, of which the following is a specification. This invention relates to an improved arrangement of electric starter for internal combustion engines, and more particularly for use in connection with large engines such as employed in submarine chasers.

The main object ofthe invention is to provide improved means which wouid prevent any damaging. of the teeth of the starter either by back-fire or by the sudden starting of the engine.

With this object in view, the invention consists in arranging that the ignition shall be disconnected before the motor commences to turn the engine, and that the o eration of the ignition shall start immediate y upon the motor being disconnected from the enne. The invention also consists in the arrangement hereinafter more particularly referred to.

One way of can ing the invention into effect is illustrated diagrammatically and by way of example inthe accompanying draw ingts, in which v igure 1 illustrates the improved arement in its first posltion,

1g. 2 illustrates the arrangementin its second position, while Fig. 3 is a diagram of connections.

Referring to the drawin a is an electric motor, which is prefers 1y an ordinary series wound motor, and is geared, to the flywheel 6 or other part of the engine. The gear may comprise a pinion a on the shaft of the electric motor, a toothed rim d provided on the fly-wheel, and intermediate toothed wheels 6 f secured to an intermediate shaft 9 and adapted to be shifted longitudinally, together with the latter shaft, by means of a lever h. shaft 9 is provided with an extension 1: adapted to operate the motor switch 9', the, arran dm'ent being such that when the-Jever h, the shaft 9 and its extensioni are in theposi iims shown in Fig. 1, the motor switch 7'" is cosed, and

Specification of Letters Patent.

nition switch is, the gear wheels Patented Oct. 7, 1919.

Application filed December 18, 1918. Serial No. 267,358,

when they are in the positions shown in Fig. 2, the said switch is open.

The ignition system comprises a ma eto ignition A and a battery ignition with a trcmbler coil B, the two ignitions being under the control of a switch I: adapted'to be operated under the-control of the starting lever h; for instance, the two movable contacts A and B of the magneto and battery ignition, respectively, may be mounted on a sprin controlled spindle 1 adapted to be Ilongitu inally shifted in one direction by the shaft extension 11 under the control of the starting lever h, and in the opposite direction by its sprin m, when released from the pressure exerted thereon under the control of the starting lever.

The operation of the arrangement herein-, before described is as follows The starting lever h is moved in one direction, as shown in Fig. 1, whereby the two ignitions A and B are disconnected by the magneto being short-circuited and the battery ignition circuit being broken lily the igbeing immediately thereupon brought into mesh with one another, and the starter switch 7' being closed, the electric motor a now turnin the engine so as to draw as into the cy inders. The starting lever is thereupon moved in the opposite direction, whereby the gear wheels are brought out of mesh with one another, as shown in Fig. 2, and the electric motor a'is mechanically and electrically disconnected. Immediately ulpon the gears being brought out of mesh, t e ignition switch It is shifted into its operative position in which the magneto ignition and the battery ignition circuits A and B are reestablished, thereby causing a spark in the cylinders and starting the enne. I wish it to be understood that the invention is not limited to the arrangement and details hereinbefore given by wa of ex= ample, as the same may be modifie without in any way departing from the spirit of the invention.

Claims:

1. An electric starter for internafmm' bustion engines comprising-an electric motor, a shiftable gear between the elctric motor and the engine means for shifting the gear in and out of the operative position, an ignition switch, ignition circuits associated with the said i nition switch, and means under the centre of the means for shifting the gear and capable of acting upon the ignition switch to render the ignition circuits inoperative when the gear is in its operative position, and to ren or them operative when the gear is in its inoperative position, as set orth.

2. An electric starter forjnternal combustion engines com rising an electric motor, a shiftable gear tween the electricmotor and the engine, means for shifting the gear in and out of the OPBI'MlVZgDSitiOD, an i ition switch comprising fix and mova le contacts, 'a spindle carrying themovable contacts and a spring forcing the spin die in one 'rection, ignition circuits connected'to the fixed contacts of the ignition switch, and means under the control of-the means for shiftin the gear and capable of forcing the spin'le carrying the movable contacts in the opposite direction to that in which it is forced by the s ring, the shiftable r and. the means cepa is of forcing the said spindle being ca able of simultaneous movement .in one direction so as to be brought into operative turning positionand to render the ignition circuits inoperative respectively, and of simultaneous movement in the other directio n so as to be brought into inoperative turning position and to render the ignition circuits operative respectively as set forth.

3. electric starter for internal-com busti'on engines comprising anelectricmotor, a shiftmble gear between the electric-mo- -placeable interme 'ete r secured to said she tor and the engine, means for shifting the ear in and put of the operative position, an ignition switch, ignition circuits associated with the said ignition switch, a motor switch 40 connected with the electric motor and means under the control of the means or shifti the gear and capable of acting upon the ignition switch to render the ignition circuits inoperative and of closing the motor switch when the r is in its operative position,

and of acting upon the ignition switch to render the ignition circuits operative and of i opening the motor switch w 4. An e ectri'c starter for internal combus tion engines comprisin an electric motor, a gear member on the e ectric motor, a gear member on the e inc, 9. longitudinsllji dis an extension of e intermed ate shaft, a lever for longitudinally displacing the intermediate shaft and its extension, 11 motor switch, an ignition switch comprising fixed and movable contacts, a spindle carrying the movable coni placed by the latter against the action of the set forth spring, as end for the pn have signed .n y y In testimony whereof name to this specification.

ALBERT HENRY MIDGLEY.

k en the as is in its mo ratlve position, as set in iate shafitan interniedi-

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