US 1009503 A
Description (OCR text may contain errors)
1 G. 0. (100111111111; I SELF STARTING DEVICE FOR INTERNAL COMBUSTION ENGINES.
APPLICATION FILED APB..14, 1911.
1 09593 Patented Nov. 21', 1911.
WITNESSES INVENT-OR "1 acawdmz .1. 1; a I z f tinirnn sTA'rns earner orrrcn.
GAVIN GAI RD GOODHAB-T, OF WILLOWS, INKPEN, ENG-LAND.
SELF-STARTING DEVICE FOR INTERNAL-COMBUSTION ENGINES Specification oi Letters Eatent.
Patented Nov. 21, 1931.
Application filed April 14, 1911. Serial 230. 621,084.
new and useful Improvements in Self-Starting Devices for Int/grnal-CombustionEngines, of which the following is a specification, reference being had thereinto the accompanying drawing.
I This invention relates to self-starting devices for use with internal combustion enginesof the type in which the power neces- 'sary to rotate the crank-shaft of the engine for the purpose of starting it is obtained from a spring which is automaticallywound up by the engine, and it has for 1ts ob ect the general improvement of this type of selfstarting device by the embodiment of the following essential features: (1) one or more stops to limit the range of action of the spring in both directions so that after the spring is wound up the drive ceases to be through the spring, (2) the arrangemen't of the parts of the apparatus concentric with one another whereby its overall length is materially shortened, and (3) the arrangement of the main clutch exterior tothe periphery of the spring whereby less power is required to release it under pressure.
In the accompanying drawing which shows-by,way of example-a form of construction for an engine rotating clockwise and adapted to be employed in a motor car and to be placed between the engine and the change speed gear of such car Figure 1 IS a view in transverse section on line AA Fig.
2, Fig. 2 is a view in longitudinal section on vISO line B-B Fig. 1, Figs. 3 and l are end views of the complete. device, and Fig.5 is a view showing a modification.-
Throughout the views similar. parts are marked with like letters of reference.
The clutch-shaft isdivided into two parts 1; and w, the former being the part connected to the clutch and the latter the part a radially arranged internal flange d said sleeve and flange and o and drum and flange d and d forming together a case within which the spring a is located. The inner end of the spring is fixed to the sleeve c andthe outer end thereof to the drum d, l
the preferred construction being to turn up the ends of the spring so as to form hooks,
the outer one of which engages a slot or notch fin the inner face of the drum (Z and the inner of which is adapted to engage one,
of a series of longitudinally arranged slots or notches g in the sleeve 0. The series of slots or notches 9 provide compensation for any variation in the length or" the spring. The sleeve 0 is arranged to rigidly engage the part w of'the clutch-shaft, a convenient arrangement being to fix, by means of screws h or the like, to the flange c a disk m having a hoss'm adapted to be fixed to the shaft w. On the flange c or on the disk mfixed thereto, as shown on the drawing, is a stop 91, which is adapted to engage with a stop 0 carried by the drum d so as to limit the range of action of the spring 6 to slightly less than one revolution. On the disk a is pivoted a pawl p which is adapted to engage ratchet teeth 0 on the sleeve On the exterior of the drum (Z is concentrically mounted a sleeve 1 which is adapted to slide longitudinally on said drum but to rotate with ittl'nough the medium of the keys or feathers s. This sliding sleeve carries dogs W-forming the other part of the main clutch which engages the dogs Z1 carried by the disk a when longitudinal motion is imparted to said sleeve. This is preferably efi eoied in one direction, viz. that to cause the dogs to engage by means of springs such as t and in the other direction to release the dogsand therefore the two parts '0 and w of the clutch shaft by means of a bell-crank lever Z pivoted to any convenient fixed part in relation to the mechanism. One arm of this lever is adapted to be operated either by the toot as shown or by hand, and the other end to contact the sliding sleeve 1". Pivoted to any convenient fixed part exterior to the sliding sleeve 7- is a pawl y adapted to engage one of a series of ratchet teeth p formed on or carried by the sleeve 0", the arrangemert of said pawl and ratchet teeth being such that when said parts are in engagement the drum, 1
the spring 0 is always fixed to the shaft w are The operation of the device is as follows :--To' start the motor the lever Z is operated to cause the sleeve 7" to slide to the left, thus bringing the ratchet teeth p under the pawl 3 which prevents the sleeve 9" and the drum (Z, which holds the outer end of the spring e, from revolving backward. At the same time the main clutch is disengaged by the dogs 1" Slipping out of en 'gagement with the dogs I). This frees the disk a i from the drum (Z and allows the spring-to operate tocause the sleeve 0 to rotate clockwise and drive the, shaft a through the ratchet c and pawl p, which gives the crank-shaft of the motor the necessary rotation to start the engine. The stop 0 is now on the left-hand side of thestop n. the lever Z is immediately operated to return the sliding sleeve 1* so that the dogs I) and 7' engage again, which causes the whole of the starting device to revolve with the shaft 11. The clutch-shaft is then engaged with the transmission gear and on the clutch being let in the drum (1 will be driven by the engine through the disk a, the dogs 2) and W and the sleeve 7' and as the shaft to is prevented from rotating by the resistance of the car the spring 6 will be wound up until the stop it comes around to the other side of the stop 0 when the drive becomes solid through the said stops and the power ofthe engine is imparted to the car through the' transmission gear. The spring e is prevented from unwinding by the ratchet teeth 0 and the pawl 79 which also take the drive when the car is driving the engine as a brake. If the engine has four cylinders the starter will only rotate the crank-shaft over two compressions whichis usually'sufiicient, but if the spring e is strong enough some of its energy will pass into the fly wheel of the engine which may carry it around still farther.
To reduce the shock when the pawl y employed to prevent the backward rotation of the drum (Z to which the outer end of the operating spring 6 is connected comes into engagement with the ratchet teeth p on the sliding sleeve 7', the pawl y instead of being mounted directly on, its pivotal pin is mounted on a rubber bush 3 so as to make it resilient, and in order to keep the engaging end of the pawl clear of the sleeve carrying the ratchet teeth 79 when the device is not in operation and to keep the engaging end of the pawl down on to the ratchet teeth an adjustable stop such as j and a spring finger such as 7e are provided, with which an ear 'i carried by the boss of the pawl engages, said stop and finger being carried respectively by suitable brackets j and k mounted on or carried by any suitable fixed art.
Although in the construction illustrated only one pair of stops at and 0 are shown, additional pairs may be employed in order to equalize the drive by stepping each additional pair so that while registering with one another they clear the other pair or pairs.
This starting device can conveniently be combined with the ordinary form of sliding wheel change speed. gear by mounting said device on the countershaft of said gear within the gear box. In. such a construction the disk 11 would be coupled to the spur wheel on the countershaft, by which said shaft receives its motion from the primary shaft of the gearing, and the sleeve 0 would be fixed on said countershaft.
lVhat I claim as my invention and desire to secure by Letters Patent is:-
1. In a self-starting device, the combination of a diskconnected to the crankshaft of the engine, a sleeve coupled to the transmission mechanism by which the engine is coupled to its load, a drum mounted on said sleeve, a spring operating between said sleeve and said drum-the inner end of said spring being anchored to the sleeve and the outer end thereof to the drum, sliding sleeve mounted to rotate with said drum,
means for imparting a longitudinal movement to said sliding sleeve, ratchet teeth on said 'sliding'sleeve, a pawl mounted on a fixed pivot and adapted to engage said ratchet teeth, a clutch adapted to couple the disk to the drum through the sliding sleeve, a ratchetand pawl adapted to couple the disk to the sleeve carrying the inner end of the spring when rotating in one direction,
and two stopsthe one carried by the sleeve carrying the inner end of the spring and the other carried by the drum carrying the outer end of the spring.
2. In a self-starting device, the combination of a disk connected to the crank-shaft of the engine, a sleeve coupled to the transmission mechanism by which the engine is coupled to its load, a drum mounted con centrically on and over said sleeve, a spring concentrically mounted in relation to and operating between said sleeve and said drum-the inner end of said spring being anchored to the sleeve and the outer end thereof to the drum, a sliding sleeve mounted in concentric relation to said drum and adapted to rotate with it, means for imparting a longitudinal movement to said sliding sleeve, ratchet teeth on said sliding sleeve,
a pawl mounted on a fixed pivot and adapted to engage said ratchet teeth, a clutch adapted to couple the disk to the drum through the sliding sleeve, a ratchet and pawl adapted to couple the disk to the sleeve carrying the inner end of the spring when rotating in one direct-ion, and two stops-the one carried by the sleeve carrying the inner end of the spring and the other carried by the drum carrying the outer end of the spring.
3. In a self-starting device, the combination of a disk connected to the crank-shaft of the'engine, a sleeve coupled-to the transmission mechanism by which the engine 15 coupled to its load,a drum mounted on said sleeve, a spring operating between said sleeve and said drum -the inner end of said spring being anchored to the sleeve and the outer end thereof to the drum, a sliding sleeve mounted to rotate with said drum, means for imparting a longitudinal movement to ing said pawl,
said sliding sleeve, ratchet teeth on said sliding sleeve, a pawl adapted to engage said ratchet teeth, a fixed pivotal pin for carryan elastic medium between said pawl and its pivotal pin, a clutch adapted to couple the disk to the drum through the sliding sleeve, a ratchetand pawl adapt ed to couple the disk to the sleeve carrying the inner end of the spring when rotating in one direction, and two stops-the one carried by the sleeve carrying the inner end of the spring and the other carried by the drum carrying the outer end of the spring.
In witness name in the presence of two subscribing witnesses.
G. V. Sums.
whereof I have signed my :2