US958909A - Starting device for internal-combustion engines. - Google Patents

Description

J. B. DIGKEY.

STARTING DEVICE FOR INTERNAL COMBUSTION ENGINES. urmonmn mum 111:0. e, 1909.

958,909. 1 Patented M84124, 1910.

UNITED STATES PATENT OFFICE.

JOHN B. DICKEY, or COLUMBUS, INDIANA, ASSIGNOR or ONE-EIGHTH, T0 WILLIAM w. DENISON AND ONE-EIGHTH T0 WALLACE B. DENISON, BOTH 0F COLUMBUS,

IHDIANA.

STARTING DEVICE FOR INTEBNiLL-CQMBUSTION ENGINES.

Specificatidxfof Letters Ilatent. P t nted M 2%, 1910.

Application filed December 9, 1909. Serial No. 532,218.

To all whom it may concern:

Be it known that I, JOHN B. Dream, a citizen of the United States, residing at C0- lumbus, in the county of Bartholomew and State of Indiana, have invented'a newand useful Starting Device for Internal-Combustion Engines, of which the following is a specification. V

This invention relates to that class of starting devices for internal combustion engines which are manually operated, and it is" the object of the invention to provide an improved device of this kind which will be authe accompanying drawing forming a part of this-specification, in which drawin Figure l isa longitudinal section of the device. Fig. 2 is a transverse section on the line 2-2 of Fig. 1.

In the drawing, 5 denotes the crank shaft of the engine, and 6 is an axially alined starting shaft, which is manually operable by a mechanism to be presently described. One end of the starting shaft 6 has a socket head 7 adapted. to be placed over the adjacent end of the crank shaft 5, the two shafts *being coupled together by providing the Wall of the socket head with a slot 8 extending obliquely to the axis of the starting shaft, and entered by a laterally projecting pin 9 carried by the crank shaft. The startlng shaft is movable in the direction of its length, so that it will be automatically disconnected froin the crank shaft when the engine starts, the engagement of the pin 9 with one of the inclined walls of the slot causing the starting shaft to back away from the crank shaft until said shafts are disconnected by the'pin leaving the slot. The opposite end of the starting shaft 6 is reduced as indicated at (10, and on this portion of the shaft is loosely mounted a shaft 11 having in one of its ends an axial pening 12 to receire said-reduceder'd of the starting shaft. The M O itB end f .the shaft ll is fitted with a hand crank 13.- Theseltwo shafts are menial alinement.

The end of the shaft 11 into which the retends, is formed with a circular enlargement or head it havin a peripheral groove 15. The head is also bored out to form a circular recess 16 sufliciently la to receive a ratchet disk 17 which is keyed or otherwise made fast to the starting shaft. 'lhefenlargement 14: of the shaft 11 is inclosed in a casing comprising a cylindrical portion 18, and heads 19 are fastened to the ends thereof. The

heads are formed with hub extensions 20 one of which supports the starting shaft, andthe other one the shaft 11. This casing is mounted on a suitable base 21 the latter beingsecured to the frame of the machine in any side.

a In the groove 15 at diametrically opposite points, are pivoted by means of pins 22 extending across the groove, levers 23,, said levers being pivotally mounted intermediate their ends. Each lever carries at its ends pivoted dogs 24 and 25 respectively, extending in opposite. direction. The dogs 24 pass looselyflthrough openings 26 in the head 14: so as to extend into the recess 16, into engagement withfhe teeth of the ratchet disk 17. The dogs 25 extend in a direction to engage ratchet teeth 27 formed on the inner surface of the cylindrical portion 18 of the casing, they being held normally in engagenent with said teeth by means of a sprlng 28 secured to the lever and"pressing aganist the back of the dogs. The ends of the levers :23 which carry the dogs 24 are engaged by a spring 29, which swin 's the levers in a direction to, hold said dog 1n engagement with the teeth of the ratchet disk 17.

The shaft-'11 moves in the-direction of its length with the starting shaft 6 when the latter is disconnected from the crank shaft 5 as already described; This lengthwise movement is given the shaft 11 by the engagement of the ratchet disk 17 with the inner end of the recess 16. shaft is moved in a direction to engage the crank shaft by means of the shaft 11. The outer end of the recess 16 is closed by a ring 30 which keeps the starting shaft and the shaft 11 together in the longitudinal sliding movement referred to. inasmuch as" the enlargement ll slides back and forth in the casing when the starting shaft is duced portion 10 of the starting shaft en- 55 suitable manner, either at the front or 70 The starting l 0 0 coupled to or disconnected from the crank shaft, the ratchet teeth 27 extend throughout the entire width of the cylindrical portion of the casing, in order that the dogs may remain in engagement therewith.

In operation, the starting shaft 6 is coupled to the crank shaft by pushing forwardly on the-shaft 11 by means of the hand crank 13. After'th'e shafts, are coupled,tl1e hand crank is turned in a direction to rotate the crank shaft to start the engine. The motion of the hand crank is transmitted to the shaft 11, and through the levers 23 and the dogs 24 to the ratchet disk 17. Inasmuch as the ratchet disk is fast to the starting shaft, and the latter is coupled to the crank shaft, it will be evident that the latter is rotated upon turning the hand crank in the proper direction. During this movement of the parts, the dogs 25 slip over the ratchet teeth 27. Inasmuch as the part on which the ratchet teeth 27 are located is stationary, it will be seen that at the least backward movement of the crank shaft, the teeth 27 will press against the dogs 25, and by reason of the connection of the latter with the lever 23, the latter will be swung on its pivot in a direction to disengage the dogs 24 from the teeth of the ratchet disk 17, thus at once disconnectingthe 'shaft 11' of the hand crank from the starting shaft 6. The ratchet teeth 27 are set close together, so that the release will take place ractically instantaneously, and danger of injury to the operator when the engine kicks back is thus entirely eliminated.

, The device is reliable in operation, simple iii-construction, and devoid of'complicated parts to get out of order, and it is capable of use in connection-witheither stationary, marine, or automobile engines. If applied to an automobile it may be mounted at the front or on the side of the machine according to the position of thecra-nk shaft. By providing the bearing hubs 20, and supporting the reduced end of the starting shaft 6 in the shaft 11, a rigid support for the several parts is had. The levers and dogs carried thereby are entirely inclosed, and are therefore protected from dust and dirt.

WVhat is claimed is:

1. In a starting :device for internal combustion engines, a starting shaft, means for coupling the same to the engine crank shaft, a ratchet disk carried by the starting shaft, a hand crank carrying a head having a recess to receive the ratchet disk, a lever carried by the head, a stationary cylindrical memberencircling the head and having its inner surface formed with ratchet teeth, and dogs carried by the aforesaid lever, one of, said dogs engaging the teeth of the ratchet disk, and the other dog the teeth of the stationary member.

2-. In a starting device for internal combustion engines, the combination with a starting shaft, means for coupling the same .to the engine crank shaft, a ratchet disk carinto the recess, a lever pivotally mounted in the groove, a dog carried at one end of said lever and passing through the opening into the recess into engagement with the teeth of the ratchet disk, a stationary cylindrical member encirclin interior surface formed with ratchet teeth, and a dog carried by the other end of the lever, and engaging the last-mentioned ratchet teeth.

' 3. In a starting device-for internal combustion engines, a startingshaft, means for coupling the same to the engine crank shaft, a ratchet disk carried by the starting shaft, a hand crank, a shaft to which said hand crank is connected, the last-mentioned shaft having an axial opening in which one end of the starting shaft is mounted, a head on the shaftof .the hand crank, said head having a recess to receive the ratchet disk, means for coupling the head to the ratchet disk, and means for automatically releasing said parts when the motion of the starting shaft is reversed.

t 4. In a starting device for internal combustion engines, a starting shaft, means for coupling the same to the engine crank shaft, a ratchet disk carried .by the starting shaft, a shaft having an axial opening in which one end of the starting shaft is supported, and carrying a hand crank, and provided witha head having a recess to receive the aforesaid ratchet disk, a stationary cylindrical member having internal ratchet teeth, heads secured to the ends ofsaid the head and having its member, said heads having hub extensions supporting the start-ing shaftand the shaft of the hand crank, means for coupling the aforesaid head to the ratchet disk, and means engageable with the aforesaid inter-- nal ratchet teeth for releasing the head from the ratchet disk when'the starting shaft is reversed.

5, Ina starting device forinternal combustion engines, a starting shaft, means for coupling the shaft to the engine crank shaft, a ratchet disk carried by the starting shaft, a hand crank, a shaft to which the hand crank is connected, the lastimentioned. shaft having an axial opening in which one end of the startin shaft is mounted, .a head on the shaft 0 .the hand crank, and having 'motion of the a recess to receive the ratchet disk, said head having a peri heral groove, and an opening extending rom said groove into therecess, a stationary cylindrical member encirclingthe head,- and having internal ratchet-teeth, a lever pivotally mounted intermediate its ends in the aforesaid groove,

a dog carried by one end of said lever, and extending through the opening into engagement with the ratchet disk, and a dog car ried-hy the other end of the lever, and engaging the aforesaid internal ratchetteeth.

6. In a starting devicefor internal coinbustion engines, astarting shaft, means for coupling the same to the engine crank shaft, a hand crank, a shaft carrying the hand crank, and havin an axial opening in which the starting sha t is supported, a support having hubs in which the starting and hand crank shaftsare supported, and means for coupling the starting and crank shafts, and means for automatically releasing said 15 shafts when the motion of the starting shaft is reversed.

In testimony that .I claim the foregoing as my own, I have hereto affixed my signaturein the presence of two witnesses.

JOHN B. DICKEY. Witnesses:

/ ROY V. Ross,

E'rmin SHIER.

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