US806583A - Starting mechanism for explosive-engines. - Google Patents

Description

1%. 806,583. PATENTED DEC. 5, 1905..

G. B. SBLDEN, JR.

STARTING MECHANISM FOR EXPLOSIVB ENGINES.

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G. B. SBLDBN, JR,

STARTING MECHANISM FOR EXPLOSI'VB ENGINES.

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. eEoEeE B. sELDEN JR.', oFnooHEsrER, NEW YORK. STARTING MECHANISM FOR EXPLOSIVE-ENGINES- i 'No. 866,583.

Specification of Letters Patent.

Application filed November 13, 1904. Serial No. 233,334.

Patented Dec. 5, 1905.

T0 at whom, it may concern:

Be it known that I, GEORGE B. SELDEN,J

for Explosive-Engines; and I do hereby de-' clare the following .to be a full, clear, and exact description'of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to improvements in starting mechanism for explosive-engines; and its object is to provide a simple means whereby such an engine may be started by hand and which at the same time willpre.

vent the operator from being injured by a back kick if the ignition should-take place too early, an accident which often occurs.

The ordinary starting mechanism for explosive-engines is so arranged that the en' gine can be started by a crank by means of a clutohmechanism, which clutch mechanism is automatically disengaged when the engine begins to run. My invention is designed to provide means whereby the disengagement of the starting-crank is instantly effected au-. tomatically in case the engine should give a back kick or commence to run backward.

With these objects in view my invention provides means whereby a member movable relative to and operatively associated with the shaft cooperates with a cam member 0 eratively associated with the starting-cran and it consists'in the construction and combinations of parts, as hereinafter described and claimed.

In the accompanyin drawings, Figure. 1 represents a top view o my improved starting mechanism. Fig. 2 represents a cross section thereof on the line 2 2 of Fig. 1 looking in the direction of the arrows. longitudinal section on the line 3 3 of Fig. 1 looking in the direction of the arrows, and Fig. 4 is a section on the line 4 4 of Fig. 1.

a represents-the ordinary crank-shaft of an explosive-engine mounted in bearings 11 and provided with a fly-wheel c. Keyed or otherwise secured in any suitable way to the shaft a is a collar or sleeve (1, provided witha ratchetfaced clutch e.

f represents the starting-crank, provided with a handle 9', which crank is provided with a sleeve h, having a ratchet-face i, which face en a es the ratchet-face e, these arts being 0 t e usual construction. The s eeve Fig. 3 is a h is'perforated and is adapted to slide and move freely on an extension 1' of the shaft (1.

-A removable nut 76 is provided to keep the starting-crank from slipping ofi the extension 1; but of course this may be dispensed with and the starting-crank maybe made removable, if desired.

1 The sleeve (1 is mounted in a suitable bearing 1, which is supported in posts m by means of screws n, these posts and screws being omitted from some of the figures.

vided with a circular plate or extension 0, which fits up a ainst the face of the bearing Z.

Keyed or otherwise fastened to the shaft a or the sleeve 01 is the member p of a clutch, which is provided with inclined recesses g and rollers or balls 1'. Surrounding the part pr and closely fitting it, but yet revoluble eely thereon, is the cooperating clutch member or ring- 8, provided with teeth 25. This clutch member or ring 8 corresponds in function in the construction illustrated to the member hereinbefore referred to as movable relative to the shaft. The teeth 25 are shown in the drawings as approximatelypyramidal in shape. this specific construction, however, as various forms of teeth may be used. Indeed,

I do not limit myself to These posts are permanently attached to the cas-' .ing of the engine.

. The sleeve h on the starting-crank is proprojecting pins might be employed instead of said teeth. The arrangement'is such that the part 10 can revolve freely in one direction without moving the toothed ring 8, which condition obtains when the engine is running forward; but if a backward rotation occurs the ring 8 is rotated along with the part 1) and sleeved by the shaft 0.. It will be seen from the drawings that my invention is herein shown as applied to an engine which normally runs left-handed.

it represents a plate held by screws 1) onto one face of the clutch member orring ,s to keep the clutch members in their proper relative positions.

The teeth t of the ring 8 areadapted to engage with the tooth z of a cam or cams 'y, one of which is mounted on a pin w on the bearing 1 and the other of which is similarly mounted on the opposite side of the bearing wider.

To one end of the sleeve 00 is attached the arm 1 provided with a curved surface which bears against the plate 0 on the sleeve h. Pins 5 may be used to limit the movement of these cams in one direction; but such limitation maybe secured by making the arm y The arm 1 also serves to limit the movements of the cam by coming in contact with the clutch member or ring 8 or the plate u. The arm y and its projecting teeth 2 and 1 are so arranged that the backward movemnt of the engine will, by means of the teeth 15 engaging the teeth 2, turn the cams into the position shown in dotted lines in Fig. 1, which will immediately shift the startingcrank lengthwise of the shaft a into the position shown by dotted lines in said figure, thereby disengaging the ratchet-faces e and i and allowing the engine to run backward freely without revolving the starting-crank. When the engine has been stopped, to start it again the starting-crank is pushed in by the operator, so as to engage the main clutch, having the ratchet-faces e and i, and the engine is then turned over by the startingcrank until it begins to run. If a back kick occurs, the part 29, through the interposed rollers r, clutches and rotates the ring .9, and the teeth t, engaging with the tooth or teeth 2, turn the cam or cams on their pivots, and the starting-crank is thereby shifted lengthwise of the crank-shaft, thus disengaging the main clutch and preventing the reverse rotation of the starting-crank.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In starting mechanism for eXplosiveengines, the combination of a driving-shaft, a starting-crank loosely mounted thereon, a member movable relative to said shaft and adapted to remain stationary when the engine is running forward and to be driven when the engine is running backward, and a cam operable by said member for disengaging the starting crank from the drivingshaft, substantially as described.

2. In starting mechanism for explosiveengines, the combination of a driving-shaft provided with a ratchet -face, a startingcrank also provided with a ratchet-face, a member movable relative to and supported by said shaft and adapted to remain stationary while the engine is running forward, but to be driven when the engine is running backward, and a toothed cam adapted to be driven by said member and when so driven to disengage said ratchet-faces from each other, substantially as. described.

3. In starting mechanism for explosiveengines, the combination with a drivingshaft provided with a ratchet mounted thereon, a starting-crank also provided with a ratchet, a member movable relative to and supported by said shaft and adapted to remain stationary while the engine is running forward and to be driven when the engine is running backward, a pivoted cam adapted to be driven by said member and when so driven to disengage said ratchets, and means for limiting the movement of said cam, substantially as described.

4. In starting mechanism for explosiveengines, the combination of a driving-shaft, a ratchet thereon, a ratchet-faced startingcrank adapted to be loosely carried by said shaft, clutch mechanism on said shaft comprising one member fiXed thereto and another member loosely mounted on said firstnamed member, whereby said second member is left stationary when the engine is running forward but is moved when the engine is running backward, and a pivoted cam with which said second member is adapted to engage and when so engaged to throw said ratchets out of engagement with each other, substantially as described.

5. In starting mechanism for explosive engines, the combination of a driving-shaft, provided with a ratchet, a starting-crank having a ratchet-face and adapted to be loosely carried by said shaft, a clutch mounted on said shaft consisting of an inner member secured thereto and provided with inclined recesses, a second member provided with rojections on its outside encircling said irst-named member, movable engaging means between said members, and a pivoted cam provided with projections adapted to engage the projections on said secondnamed member and when so engaged to disengage said ratchets, and means for limiting the movement of said cam, substantially as described.

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

GEORGE B. SELDEN, JR.

Witnesses:

HENRY B. SELDEN, I-IERMANN F. CUNTZ.

ICC

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