US1246233A - Automobile-starter. - Google Patents

Description

H. CHISHOLMQ AUTOMOBILE STARTER. APPLICATION FILED MAR. 6. 1915.

1,246,233. Patented Nov. 13', 1917.

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UNITED STATES rarnnr onrion.

HENRY, CHISI-IOLM, OF NORTH B NDALL, OHIO.

AUTOMOBILE-STARTER.

Specification of Letters Pietent';

Application fi1ed..March 6, 1915. Serial No. 12,497,

To all whom it may concern:

Be it known that I, HENRY CHisrioLM,

a citizen of the United States, residing at' North Randall, in the county of: Ouyahoga and State of Ohio, have invented a certain seat of an automobile, for cranking the rin-' ternal combustion motor of said automobile.

The objects of-the invention are to .pro-

vide a mechanical Starter whichisof comparatively small first cost; which may be applied to conventional automobiles quickly and cheaply and with substantially no change in the construction of the automobile itself; which will be easily operable when.

in place; and which is not likely to get out of order- With these obj ects in view, the invention consists in the construction and combination of parts shown in the drawings, and hereinafter described and definitely pointed out in the appended claims.

In the drawings, Figure lgis asideelevation, partly sectioned, of this invention applied to a motor car; Fig. 2 is a planview of the same; Fig. 3 is a sectional end view in the plane of the line 3-3 on Fig. 1; Fig; 4 is a sectional end view inthe plane ofline 44 on Fig. 2.

In the drawings, represents apart. of an internal combustion motor,v and 12 represents the crank shaft of saidmotor represents the cranking shaft, whichisrotatablv mounted-in the bearin bracket- 17 D 7 and is under the influence of a-springlS tending to move said shaft endwise forward in its bearing. On the adjacent ends- 'of these two alined shafts are the two members of a well known one way acting clutch. That is to say, the cranking shaft has on its rear end a concentric row of undercut teeth 15, and the crank shaft has a flange carrying one or more inwardly 'proj ecting pins 13.

The above described mechanism is conventional construction, and is to be found on nearly every automobile whose motor has to be cranked by hand. The specific construction shown is that which is found on the Ford automobile.

The starter includes a spirally twisted bar 20, and a member 21, which is shown in the form of a cylinder.

other,; and the endwise movable member must be lncapable of rotation. As shown, it.

is the bar'20 which is so movable endwise,

and does not rotate. The other of saidtwo parts must be rotatable, but'incapable of endwise -movem'ent.

In the construction shown, the cylinder 21is a'rotatable member, and this is mounted in bearing brackets 31%32, which project upwardlfrom a base member 30,- which must besecurely fastened to some fixed part'of In the construction shown,

the automobile. th s base member is secured .in a horizontal posit on to the motor, 10 by the same'bolts 33 which are utilized to secure the head. plate 11 to that part of the motor in which the cylinders are. 7 a

Thecylinder 21 has near its front end an anti-frictionthrust bearing 34 of familiar; form againstwhich a flange 23 onthe cyl-. inder engages. There is fixed to the front end of this cylinder a sprocket wheel 24. A cooperating sprocket wheel 19 is fixed to the cranking shaft 14, and these two are connectedby a suitable chain belt 22.

the rear end thereof are two studs 26, on which two friction rollers 27 are mounted in such position as toengage sides of the-bar and near opposite edges thereof. Lugs 28 project inward from the inner periphery of: said cylinder adjacent to opposite sides of said twisted bar 20, and adjacent to thetwo friction rollers 27, the function of these lugs.

being to prevent the cylinder 21, and its two frictionrollers 27, from moving out of op: erative relation to the twisted bar 20.

. Rigidly fixed to the rear end of twisted bar 20iis an operating bar. 40, which extends through a suitable hole in the dash 41, and this barhas at its front enda pedal piece 42 for the operator to put his foot. against.

Justinfron-t ofthedash 41 and adjacent to the rear end'of the twisted bar the base member 30 is provided with a forked bracket: between the forks of which the operating bar passes. One friction roller- 36 isrotatably mounted between said forks, and the bar 40 rests upon it. Another friction roller 37 is mounted on a vertical axis on one fork and engages against one side of the operating bar 40, but near the lower edge thereof. Another friction roller 38 mounted on the Patent'ed'Nov. 1a,- 1917.

Within the cylinder 21 and adjacent to One ofthese parts mustbe movable endwise relatively to the other fork of said bracket engages said operating bar 40 on the opposite side thereof but near its upper edge. These two friction rollers 3837 take the strain from the twisted bar 20 and serve to preventit and the operating bar 40 from rotating while permitting their endwise movement.

ll hen the operating bar 40 to which the twisted bar 20 is attached has been moved rearward, the operator sitting in the drivers seat puts his foot upon the pedal piece 42 and pushes said bar rapidly forward. This causes the twisted bar to enter the cylinder, and by engaging the two friction rollers 27 causes said cylinder to turn. This turning movement is transmitted through the two sprocket wheels 24 and 19 and the chain belt 22 to the cranking shaft 14. If at this time the clutch 15 of this shaft is in operative engagement with the clutch member 13 of the engine crank shaft said crank shaft Will necessarily be turned in the same manner as if the operator had taken hold of the crank 16.

In order that the cranking shaft 14 may be moved rearward to cause the operative engagement of the clutch member 15 carried thereby with the clutch member 13 on the motor crank shaft, a bell crank lever 50 is pivoted to an arm 51 fixed to the bracket 17. One arm of this lever engagesthe end of the hub of the sprocket wheel 19, which as stated, is fixed to tne cranking shaft. To the other arm of this lever a cable 52 is connected. This cable goes over a guide sheave 53 mounted on the base member 30, and thence rearward, and its rear end. is connected with one arm of a lever 54. This lever is pivoted on a vertical axis to one of the forks of the bracket 35,so that as shown,its otherwise free end lies normally close to one side of the bar 40. On this side of said bar is a cam-faced lug 43 which, when bar 40 is drawn forward, preparatory to that rearward movement which is to turn the cylinder 21, will engage the lever 54, and so rock it that the cable will be drawn rearward. This will rock lever 50 in such wise that the cranking shaft 14 will be moved rearward to cause its clutch member to engage the clutch member on the motorcrank shaft.

The forward movement of the bar 40 carries the lug 43 out of engagement with the V lever 54. This allows the spring 18 to m0Ve the cranking shaft forward; and said shaft will so move and thereby the clutch memhere 13 and 15 will be disengaged, as soon as the engine crank shaft runs ahead of the cranking shaft 14.

The sprocket 19 may be connected with the cranking shaft 14 by a one way acting ratchet clutch of familiar form; and therefore, if one chooses, he may by manipulating the crank 16, crank the engine in the usual way without causing any movement of the mechanical starting mechanism above described.

In order that the Operator may e able to easily draw the bar 2040 back to the starting position, a toe clip 62 may be-fiXed t0 the rear end of the bar 40, as shown.

Having described my invention, I claim:

1. In an automobile starter, the combination of a base member adapted for connection with the fixed part of an automobile, bearings thereon, a cylinder rotatably mounted in said bearings and having inwardlyprojecting studs, friction rollers mounted on said studs, inwardly projecting'lugs along side of said rollers, a spirally twisted bar whose front ends project into said cylinder in such wise that its edges project between said lugs and. rollers, an operating bar -rigidly liked to said spirally twisted bar, guid= ing means for said operating bar causing it to move in straight lines endwise, and a train of Inechanismfor transmitting rotary mo tion from said cylinder to the crank shaft of the motor.

2.111 anautomobile starter, the combination of a cylinder rotatably mounted, a thrust bearing for the front end of said cylinder, inwardly projecting studs near the rear end of said cylinder, friction rollers mounted upon said studs, a spirally twisted bar whose front end projects into said cylinder and into engagement at its sides with said rollers, an operating bar rigidly fixed to the said twisted bar and projecting rear-. ward therefrom, a roller below said bar and upon which the bar rests, and two rollers on opposite sides of the bar one engaging with one side of the bar near its upper edge, and the other with the other side of the bar near its lower edge, and a train of mechanism for transmitting rotary motion from said cyl inder to the crank shaft of the motor.

In testimony whereof, I hereunto aflix my signature in the presence of two witnesses.

HENRY CHISHOLM.

\Vitnesses:

A. J. HUDsoN, I E. L. THURSTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patento, Washington, I). G.

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