US1026528A - Starting-crank for hydrocarbon-engines. - Google Patents

Description

E. J. PATTON STARTING-CRANK FOB HYDROGARBON ENGINES.

\ APPLICATION FILED MAY 1, 1911.

1,026,528. I PatentedMayl l, 1912.

. r Z J j I Attorneys UNITED STATES PATENT OFFICE.

ELIAS J'. PA'ITON, OF MICHIGAN CITY, INDIANA, ASSIGNOR OF ONE-HALF TO JAY I. BERGERON, OF MICHIGAN CITY, INDIANA.

STARTING-CRANK FOR HYDROCARBON-ENGINES.

To all whom it may concern:

Be it known that I, ELIAS J. PA'ITON, a citizen of the United States, residing at Michigan City, in the county of Laporte and State of Indiana, have invented a new and useful StartingCrank for Hydrocarbon-Engines, of which the following is a specification.

This invention relates to cranks for use in starting hydrocarbon engines, its object being to provide a simple device of this type designed to be used in lieu of the ordinary cranks and which is so constructed as to prevent injury to the operator in the event of back firing.

Another object is to provide a crank made up of separate arms one of which is secured to the crank or starting shaft and adapted to move therewith at all times while the other arm, from which the grip of the crank extends, is not fixedly connected to the shaft,

there being cooperating means upon the twoarms for holding them against relative movement except when the crank is subjected to a sudden jerk in a reverse direction such as produced by back firing whereupon the arms are freed from each other, one of them being thus permitted to rotate with the en gine shaft while the other arm, to which the grip is connected, may remain stationary.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

In the accompanying drawings, the pre ferred form of the invention has been shown.

In said drawings :-Figure l is a plan view of the crank,-the same being shown in engagement with the end portion of a shaft. Fig. 2 is an elevation of the crank, the parts being shown in their normal positions. Fig. 3 is a, similar view showing the relative positions of the parts in the event of back firing of the engine. Fig. 4 is a section through the hub portion of the crank.

Referring to the figures by characters of reference 1 designates an arm having a collar 2 at one end adapted to be mounted on Specification of Letters Patent.

Application filed May 1, 1911.

Patented May 14:, 1912. Serial No. 624,337.

the starting shaft of an engine and this collar is provided with a cylindrical boss 3 to which a retaining ring 4 is secured by means of bolts, rivets, or the like, an annular groove or channel 5 being thus formed for the reception of the end of the operating arm 6. This arm rotates freely upon the boss 3 and is provided, at its free end, with a grip or handle 7 whereby it can be conveniently manipulated. A trip 8 is pivotallymounted, as at 9, upon that face of the arm 6 nearest arm 1 and an arcuate slot 10 is formed within the trip and receives a stop pin 11 projecting from the arm 6. A weight 8 is formed at the outer end of the trip and an annular tooth 12 projects from the pivot end of the trip. This tooth is designed to be normally seated within an angular notch 13 formed in the free end of the arm 1. A spring pressed pin 14 is carried by the trip and is normally pressed in contact with the arm 6, there being recesses 15 and 16 in the arm 6 and into either of which the pin 11 is adapted to project. When the pin is located in recess 15, the toot-h 12 is held seated within the notch 13, thus holding arm 6 against rotation independently of the arm 1. It will be seen, therefore, that when the crank is placed in engagement with the shaft A and turned as ordinarily, the arm 6, when rotated, will cause a corresponding movement of the arm 1 and the shaft A will therefore be rotated as ordinarily. If, however, the engine shouldback fire, the jerk produced by the sudden reverse movement of the crank will cause the weighted trip 8 to swing about its pivot. 9 in the direction of the arrow in Fig. 3, pin 14 being thus shifted from recess 15 to recess 16 and the tooth 12 moved out of the notch 13. Arm 1 can therefore rotate backwardly with the shaft A while the arm 6 is held stationary by the operator. Only a very slight backward movement of the arm 6 occurs while the tooth 12 on the trip is being unseated from the recess 13, this movement usually being about one-half an inch at the grip end of the arm. By providing the recess 16 for the reception of pin 14 when the trip is shifted out of its normal position, the tooth 12 is held out of the path of the arm 1 so as not to be struck thereby should the arm make one or more revolutions.

It will be apparent that a crank such as described can be readily used in lieu. of the ordinary cranks and renders the starting of the engine as safe as where special appliances built upon the machine are employed.

What is claimed is 1. A starting crank for hydro-carbon engines, including an arm having means for engaging and rotating with a shaft, a second arm mounted for rotation relative to said means, and a weighted trip upon one arm and adapted to engage the other arm to hold the arms against relative movement, said trip being shiftable automatically by the quick reverse of the arms, to release the arms from each other.

2. A starting crank for hydro-carbon engines, including relatively movable arms, means upon one of the arms for engaging and rotating with the engine shaft, the other arm being mounted to freely rotate relativeto the shaft and a weighted trip upon one of the arms and engaging the other arm to hold said arms against relative movement, the weight on the trip constituting means for automatically shifting the trip and releasing the arms from each other upon the quick reverse of the arms.

3. A starting crank for hydro-carbon engines, including relatively movable arms, means upon one of the arms for engaging and rotating with the engine shaft, the other arm being mounted to rotate freely relative to the shaft, a trip pivotally connected to one of the arms and having a weighted portion, means upon the trip and the other arm for holding the arms against relative movement, said weight constituting means for automatically shifting the trip to release the arms during the quick reverse movement of the arms.

4. A starting crank for hydro-carbon engines, including relatively movable arms, means upon one of the arms for engaging and rotating with the engine shaft, the other arm being mounted to rotate freely relative to the shaft, a trip pivotally connected to one of the arms and having a weighted portion, means upon the trip and the other arm for holding the arms against relative move- -ment, said weight constituting means for automatically shifting the trip to release the arms during the quick reverse movement of the arms, and cooperating means upon the trip and its arm for holding the trip in and out of holding position.

5. A starting crank including relatively movable arms, means upon one of the arms for engaging and rotating with the engine shaft, the other arm being mounted to rotate freely relative to the engine shaft, a trip pivotally mounted on one of the arms, cooperating means upon the trip and its arm for limiting the swinging movement of the trip relative to the arm, cooperating means upon the trip and the other arm for holding the arms against relative movement, and a weight upon the trip, said weight constituting means for automatically shifting the trip to release the arm engaged thereby upon the quick reverse of the arms.

6. A starting crank including relatively movable arms, means upon one of the arms for engaging and rotating with the engine shaft, the other arm being mounted to rotate freely relative to the shaft, a trip pivotally mounted upon one of the arms, cooperating means upon the trip and the other arm for holding said arms against relative movement, a weight upon the trip and constituting means for automatically shifting the trip to release the engaged arm upon the quick reverse of the arms, and cooperating means upon the trip and its arm for holding said trip yieldingly in or out of engaging position.

7. A starting crank including an arm, means thereon for engaging a shaft, a second arm mounted for rotation upon said means, a trip pivotally mounted upon one of the armsand normally engaging the other arm to hold said arms against relative movement, and a weight upon the trip.

8. A starting crank including relatively movable arms, means upon one of the arms for engaging and rotating with the engine shaft, the other arm being adapted to rotate freely relative to the shaft, and weighted means pivotally mounted upon one of the arms for normally holding the arms against relative movement.

9. A starting crank including relatively movable arms, means upon one of the arms for engaging and rotating with the engine shaft, the other arm being adapted to rotate freely relative to the engine shaft, aweighted trip pivotally mounted upon one of the arms, there being a projection upon the trip, the other arm having a recess for the reception of the projection, and yielding means for holding the trip with its projection either in or out of engagement with the recessed arm. a

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signatur in the presence of two witnesses.

ELIAS J. PATTON. Witnesses J 0s. M. GROTT, ROBERT F. GARRn'rTsoN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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