US1858583A - Starting device for engines - Google Patents

Description

- May 17, 1932. E. H. FAHRNEY 1 1,853,583

. STARTING DEVICE FOR ENGINES Filed Nov. 15, 1929 Patented May 17, 1932 UNITED STATE EMERY H. FAHRNEY, OF CHICAGO, ILLINOIS STARTING DEVICE FOR ENGINES 7 Application filed November 15, 1929. Serial No. 407,449.

This invention relates to improvements in starting devices for engines, andone' of the objects of the invention is to provide improved means whereby the engine may be started by hand through the medium of a flexible member, such as a chain or cable, all being encased within a housing.

A further object is to provide in a device of this character improved means for mounting the housing so that in the event the engine kicks back and winds up the flexible actuating member to its limit, the housing will move or rotate to a sufficient extent to prevent breaking of the flexible member or any other damage.

To the attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the features of novelty in substantially 2 the construction, combination and arrangement of the several parts hereinafter more fully described and claimed and shown in the accompanying drawings illustrating this invention, and in which a on line 11, Figure 2, of a device of this character constructed in accordance with the principles of this invention.

Figure 2 is a sectional view taken on line 2-2, Figure 1.

Referring more particularly to the draw ings the numeral 10 designates the engine shaft which it is desired to rotate and 11 indicates the usual fly Wheel, the fly wheel being housed within a casing 12.

Connected to the shaft 10 for rotation therewith is a supporting member 13 which is preferably provided with a laterally pro- A jecting circumferential flange 14, although the latter is not necessary, and pivotally sup ported by the member 13 are a plurality of dogs or pawls 15, any number of which may be provided, but three are here shown. Loosely mounted upon the shaft 10 is a ratchet member 16 provided with any number of teeth 17 with which the pawls 15 cooperate.

If desired a bushing 18 may be interposed between the ratchet member 16 and the shaft Figure 1 is a vertical sectional view taken The ratchetmember 16 is provided with a drum portion 19 preferably having'a peripheral groove in which may be located a seriesof teeth 20. v y 5 A flexible member 21, preferably in the 55. form of a chain is secured by one end, in any suitable manner, to the drum 19 and the flexible member is adapted to be wound upon the drum in such a manner that the teeth or projections 20 in the peripheral groove will enter some of the links in-the flexible member. 7 I

Acoiled spring22 is provided and tends normally to rotate the ratchet element 16' in one direction. One end of the spring is 6 anchored as at 23 to a fixed support 24 and the other end is secured as at 25 to the ratchet element 16. I r

The spring 22 tends normally to wind the flexible member 21 upon the drum 19.

A handle 26 is connected with the flexible member 21 and is adapted, to be grasped by the operator as'a medium for withdrawing the flexible member 21 from the vdrum 19. As the flexible member 21 is drawn out by the handle 26, it will be unwound from the drum 19 of the ratchet member 16, causing the latter to rotate and inasmuch as the ends of the dogs or pawls 15 will be contacted with the teeth 17 of the ratchet element, the support-or supporting member 13 and consequently the shaft 10 of the engine willbe rotated. Q

As soon as the speed of rotation of the shaft 10 exceeds the speedof the ratchet element 16 under the stress of the flexible member 21, the support 13 will rotate in advance of the ratchet element16and will travel in the direction indicated by the arrow in Figure 1. Just as soon as this member 13 travels in advance of the ratchet element 16 the to pawls 15 will be thrown out by centrifugal force, as indicated by the dotted .lines in Figure'l. During the turning of the ratchet element 16 by the flexible member 21, energy will be stored in the spring 22 which, when the flexible member is released by the operator, will cause the ratchet element 16 and drum 19 to rotate in a direction to wind up the flexible member 21 on' the drum.

The support 13, dogs or pawls 15, ratchet 77 member 16"and drum 19 are located within back when the flexible member. 21 is wound uponfthe drum 19, it will be manifest that unless some means is provided for compensating this kick back the flexiblemember would be broken. Therefore, the housing or casing 27 is mounted for rotationrwith respect to the casing 12,, under abnormal conditions. To that end there is provided a circumferential flange 31 on the bottom of the housing which rests against the casing 12. An annular member 32 engages the flange '31 and is secured against the housing 12 by means of suitable fastening devices 33, such as bolts or the like and will frictional-1y bind the'housing 27 against movement under normal conditions; When however, as before stated, the engine kicks back the housing 27 will, through the medium of the flexible member 21, handle 26 and opening 28, impart a rotary movement to the housing'27 to overcome the friction between the flange 81 and the casing12 and fastening ring 32.

'While the'preferred form of the invention has (been herein shown andzdiescribed, it is to be understood that various changes may be made in the details of construction and in the combination and arrangement of the several parts, within the scope of the claims, without departing from the spirit of this invention. 1 I What is claimed as new is 2* r 7 1,111 combination a rotatable shaft, a starter therefor embodying oo-operating pawl and ratchet mechanisnnone part of which 'mechanism isse'cured to the shaft for rotation therewith, means for rotating the other, said means embodying aflexible -member adapted to be w-ound up and unwound, a casing forming :a housing'for said'mechanism, said flexible member passing through the casing to-the outside thereof, and means mounting said casing for rotation.

2. In combination a rotatable shaft, a starter there-for embodying co operating pawl and ratchet mechanism, one part of which mechanism is securedto the shaft for rotation therewith, means for rotating the other, :said means embodying a flexible member adapted to be wound up and unwound, a :casing forming a housing forsaid mechanism, said flexible member passing through the casing to the outside thereof, means mounting .said casing for rotation under abe normal conditions, and means normally maintaining the casing against such rotation. r

3. In combination a rotatable shaft, a starter therefor embodying co-operating pawl and ratchet mechanism, one part of which mechanism is secured to the shaft for rotation therewith, means for rotating the other, said means embodying a flexible member adapted to be wound up and unwound, a casing forming a housing for said mechanism, said flexible member passing through the casing to the outside thereof, means mounting said casing for rotation under abnormal conditions, and friction means yieldingly maintaining said casing normally ag ta on 4. In corirb'nation a rotatable shaft; a

ratchet member .on said shaft and rotatable with respect thereto, member fixed to the shaft for rotation therewith, a 1 pawl pivotally mounted upon said member and co-operating'with the ratchet member for locking the shaft and ratchet together'whereby uponrotation of the ratchet member the' shaft will vbe rotated, a flexible member adapted to be wound upon the ratchet member and un wound therefrom for rotating the latter, a

spring for winding up said flexible member, said spring being placed under stressto-store energy therein by the unwinding of the flexible member from the ratchet membenua. cas- 7 ing housingthe starting mechanism, said flex ible member passing through the casing wall to the outside thereof, and means mounting the casing for rotation under abnormalconditions. I 5. In combinationa rotatable shaft, a ratchet member on :said shaft and rotatable with respect thereto,-a member fixed to the shaft for rotation therewith, a pawl pivot-, allyv mounted upon said member and co-operating with the ratchet member for locking the shaft and ratchet together whereby upon rotation of the ratchet member the shaft will be rotated, a flexible memberada'pted to be wound upon the ratchet member and unwound therefrom for rotating thelatter, a spring for winding up said flexible member, said spring being placed under stress to store energy therein by the unwinding of the flexible member from theratchet member, a'casing housing the starting mechanism, said flexible member passing through the casing wall to the outside thereof, and means mounting the casi-ngfor rotation under abnormal conditions, the last recited means frictionally holding the casing against such rotation under normal conditions. 7

In testimony whereof, I have signed my a name to this specification on this 12th day of November, 1929. V

' EMERY H. 'FAHRNEY.

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