US1145294A - Starting-crank for engines. - Google Patents

Description

W. E. DALE.

STARTING CRANK FOR ENGINES.

APPLICATION men FEB. 9. 191's.

LE -@5394. Patented Jilly 6, 1915.

2 SHEETS-SHEET -l liable/ W. E. DALE STARTING CRANK FOR ENGINES.

APPLICATION FILED FEB. 9, I915;

Patented July 6, 1915.

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WILLIAM E. DALE, OF WISE, VIRGINIA.

v STARTING-CRANK FOR ENGINES.

Specification of Letters Patent.

Patented July 6, 1915.

Application filed 'February 9, 1915. Serial No. 7,177.

To all whom it may concern:

Be it known that 1, WILLIAM E. ]:?ALE, a citizen of the United States, residing at Wise, in the county of Wise and State of injury to the operator in the event of back firing of the engine.

The invention accordingly consists in the features of construction, combination and arrangement of parts hereinafter fully described and claimed, reference beinghad to the accompanying drawings, in which Figure 1 is a top plan view of a starting crank constructed in accordance with the invention, showing the parts in normal position. Fig. 2 is a vertical longitudinal sectional view on the line 22 of Fig. 1. Fig. 3 is a sectional plan view showing the parts set for a cranking action. Fig. 4 is a vertical transverse sectional view on the line H of Fig. 3. Fig. 5 is a vertical transverse sectional view on the line 55 of Fig. 1. Fig. 6 is a sectional view on the line 66 of Fig. 3. Fig. 7 is a perspective view of the outer crank shaft section and parts attached.

Similar reference characters indicate corresponding parts throughout the several views in the drawings.

Referring to the drawings in detail, 1 designates a suitable frame support having bearings 2 for a pair of crank shaft sections 3 and 4, respectively. The shaft section 3,

which may be termed the inner shaft section, is provided with a coupling head 5 of the ordinary well-known construction for engagement with a coupling head 6 mounted as usual on the engine shaft 7 while the outer crank shaft section has fixed thereto a hand crank '8. The two crank shaft sections 3 and 41 extend at their proximate ends into the opposite ends of a drum or cylinder '9 which is closed at its rear end by an integral head 10 having peripheral ratchet teeth 11 with which are adapted to engage a spring dog or pawl 12 pivotally mounted on the frame support for holding the drum or cylinder against retrograde rotation, while permitting it to have rotation in the reverse directio The shaft section 3 extends through the head 10 centrally thereof and carries at its inner end a coupling or clutch member 13,

and is held from longitudinal. movement relative to the drum or cylinder 9, while permitting it to have rotary'movement by means of a collaror washer 14 and retaining pin 15. The coupling or clutch member 13 is fastened to the shaft section 3 and is formed with V -shaped teeth to engage similar teeth upon a coupling or clutch member 16 which is fixed to and carried by the outer shaft section 4:, and this shaft. section has a limited longitudinal as well as a rotary movement, said longitudinal movement being suflicient to throw the clutch member 16 into and out of engagement with the clutch member 13 when required.

The shaft section 4 extends centrally through a head 17 which is in the form of a disk for closing the front end of the drum or cylinder 9 and is fastened thereto through the medium of the screw members 18, while loosely surrounding the shaft'section 4 and working against the frame support is a collar or washer 19 which isheld in contact therewith by a coiled expansion spring 20 which surrounds the shaft 4 and has one end working against the collar 19 and itsopposite end working against the hand crank 8, the spring being designed to normally hold the coupling heads 5 and 6 out of engagement with each other.

It will of course be understood that when the coupling heads 5 and 6 are out of engagement with each other the shafts 3 and 4:

may be turned in unison irdependently of the engine shaft, and then when it is desired to crank the engine the shaft -1 is moved inwardly against the resistance of the spring 20 to bring the coupling members 5 and 6 into engagement with each other.

The head 17 is provided with a pair of diametrically disposed curved or segmental slots 21 which are adapted to receive pins or projections 22 upon the clutch member 1 16 when the same are separated, and the teeth thereon will ride over each other so that in this event the shaft iis free from the shaft 3 so that either may rotate independently. Formed on the inner side of the head 17" spaced from the ends of the respective slots 21 are stop lugs 23 with which but before this occurs the clutch member the coupling members 5 and 6 are engaged with each other and the hand crank 8 is turned the engine will be started. I

At one end of each slot is an mturned lip or ear 25 which serves to direct the pins or lugs 22 through the slots 21 when the shaft 4: is turned in a reverse direction, and thereby disengage thecouplings or clutch heads 13 and 16 from each other. When the pins or lugs 22. abut the pins or lugs 23 they will be held against the inner face of the head 17 so as not to protrude through the slots, and in this position the clutch heads 13 and 16 are locked with each other. 7

When cranking the engine, should back .fire occur, the clutch heads 13 and 16 will automatically disengage from'each other as the teeth thereon will become out ofmes'h,

16 will become partially rotated so that the lugs 22 thereon will register with the-slots 21 .so that the clutch head 16 will have a clearance to move outwardly, and likewise the shaft 1 carrying the same, and in this manner the shafts 3 and 4: are freed from [each other so that the engine shaft on its reverse movement will not disturb the hand crank 8 with resultant injury to the operator or person .cranking the engine.

It will be seen that my invention provides a simple, reliable and efficient type of start-.

- ing device which may be applied for general use, and which may be manufacturedand sold at a comparatively low cost. What is claimed is 1. A starting crank comprising a crank shaft formed in two sections, coupling members on the respective sections and adapted to be connected'and disconnected by relative movement d the shafts, spring means for normally holding said coupling members .on one of the shaft sections for normally holdingit at the limit of its limited rotar movement.

2. A starting crank comprising a frame support, a pair of shafts journaled in said support, clutch heads on the respective shafts, a drum loosely surrounding the clutch heads and having a ratchet wheel, a dog on the frame support and engaging the ratchet wheel to hold the drum from retrograde rotation, a hand crank on one of said shafts, a coupling on the other shaft forlocking engagement with an engine shaft, means for holding the clutch heads in positive docked engagement with each other whereby both shafts will rotate in unison in one direction but permitting the separation of. the clutch heads for freein shafts relative to each other for pernng inde pendent reverse rotation of one of the shafts, resilient means for normally holding the shaft sections in a position for the disengagement of the coupling from the engine shaft, and, means for limiting the rotation of the..crank carrying shaft when the clutch heads have been separated.

In testimony whereof I afiix my signature in presence of two witnesses.

-WILLIAM E. DALE.

Witnesses:

OSCAR M. Vreane, E. L. Bass.

Copies of this patent nlay be obtained for five cents each, by addressing the Gommissiener of 1",

Washington, D. G.

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