US1330834A - Engine-starter - Google Patents

Description

v. BENDlX.

ENGINE STARTER. APPLICATION FILED DEC-19.1917

1,330,834. Patented Feb.17,1920.

2 SHEETS-SHEET I Ink/6722 07" I fly Patented Feb. 17,1920.

2 SHEETS-SHEET 2- mm Q.

,frzz/cvzi o' 9 JMM WLSSGS VINCENT BEN DIX, OF CHICAGO, ILLINOIS.

v ENGINE-STARTER.

To all whom z'tmay concern: 3

Be it known that I, VINCENT Bnnnixya citizen 'of the United States, residing at Chicago, Cook county, Illinois, have invented certain new and useful Improvements in Engine-Starters, of which the following is a specification.

My inventionrelates to the drive or transmission portion of starting apparatus for the starting of engines, more particularly internal combustion engines, andthe general object thereof is to provide simple, efficient and reliable transmission mechanism of this character of novel construction and operation in the respects hereinafter made apparent from the description.

My drive or transmission is of that type exemplified by patents heretofore issued to me such as Patent No. 1,125,935, dated January 26, 1915, which type is characterized by a motor driven member, such as a screw shaft, on which is mounted a driven mem ber such as a pinion adapted to mesh with apart of the engine to be started and capable of longitudinal movement with respect to the screw shaft and of rotary'movement therewith. My invention pertains more particularly to the construction and operation of a screw member which is mounted on the screw shaft and of which the pinion proper forms a part. My invention also relates to novel driving means interposed between amotor driven driving shaft and the screw shaft.

In the drawings Figure 1 is a sectional elevation of a starting apparatus illustrating a-drive or transmission embodying my invention; Figs. 2, 3 and 4 sections on correspondingly numbered section lines of Fi 1 and Fig. 5 a sectional elevation of a modified form of drive; It will be understood that my drive or transmission may be operated directly or indirectly by the prime mover, which is herein in the form of an electric motor, and while in the present instance I have shown the same as driven directly by a driving shaft, such as the extended armature shaft of the motor, it will be understood that my invention is not limited to such construction.

Referring to the particular embodiment of my invention as herein shown in Figs. 1 to 4, the driving shaft '1 is the extended armature shaft and is therefore directdriven by the motor. It is journaled at its Specification of Letters Patent.

ng "splined or keyed to the sleeve by means of Patented Feb. 17, 1920.

Application riled December 19, 1917. Serial No. 207,842

Outer end in the bearing 2 of the inclosing cas1ng2 secured to the motor frame.

Upon the driving shaft is mounted the screw shaft 3 which is here a screw sleeve having the external screw threads 3*. This screw shaft is operatively connected with 1 by a driving connection,

the driving shaft here shown in the form of a friction clutch. This clutch consists of the drum or Y 4 having a hub portion 4 fitting upon an secured to the driving shaft by means of a key 5. Withim this casing is arranged a' series of fixed and movable friction plates 6 and 7 respectively, the former being secured to the casing and being held fixedly as respects longitudinal movement by means the driving shaft 1 through said clutch, including the casing 4 and multiple disks 6 and 7. At the outer end of the screw shaft is formed or secured a stop nut or collar 11 against which the screw member abuts and is stopped thereby as hereinafter explained.

- The screw member is formed in two main parts, one a screw sleeve 12-internally screw threaded and mounted upon the screw threads of the shaft 3 and adapted to move longitudinallylthereof and rotarily thereoFFIoE.

casing with and the other the driving member or pinion proper. .This screw sleeve is screw threaded for only a portion of the length of its bore, the remaining or smooth portion extending over the smooth or plain portion of the screw shaft beyond the screw threaded portion thereof. At its inner end this sleeve is provided with a weighted disk 13 secured to or formed asa part thereof and adapted to assure the Ion itudinal movement of the screw member when the screw shaft is r'o tated. i I

Upon the'screw-sleeve is mounted the drivmember or pinion 14, the same being the longitudinal key 15 so that the pinion will be rotated positivel thereby and therewith (being non-rotari y connected thereeration with) and also be capable of longitudinal movement with respect thereto. This pinion is held in a normal outward position against the flange 12 with a yielding pressure as by means of a coiled spring 16 interposed between the inner end of the pinion and a projection at the end of the screw sleeve, which projection is here the weighted disk itself.

Describing the operation of my device and beginning the description of a cycle of opt ereof with the parts in their nor mal or home position shown in Fig. 1, when the electric motor is operated the driving shaft 1 will be rotated and the screw shaft 3 will likewise be rotated throughthe clutch vhereinbefore explained. Thereupon abuts andis stopped by the nut 11 it will.

partake of the rotary movement of the screw shaft and the fly-wheel will therefore be rotated. When the engine starts on its own power the screw member will be automatically demeshed and returned to normal position. 1

In the event that the teeth of the pinion and of the fly wheel are not in register and the teeth shall thereupon abut end to end, the pinion will be momentarily stopped but the sleeve will continue to move outwardly against the yielding pressure afforded by the spring 16. The result will be a slight rotation of the screw member, whereupon the teeth will be brought into register and the proper meshing obtained. According to this construction the shock or jar occasioned by the abutting of the teeth end to end willbe very slight inasmuch as only a small and light portion (that is the light pinion) of the entire screw member will be brought into contact with the fly-wheel or have anything to do with the impact and the slight impact itself will be occasioned or relieved by the spring 16.

In Fig. 5 I have'shown a modified form of construction in which the corresponding parts are given thesame reference characters. This construction is the same as that already described with the exception that a yielding driving connection consisting of a coiled spring is employed in place of the friction clutch illustrated in Fig. 1. According to this construction the driven shaft 1 is operatively connected to the screw shaft by means of the coiled spring 18 whose ends are anchored to the driving shaft 1 and to the sleeve shaft 3 by the bolts or studs 19 and 20 respectively. In this construction the spring 18 acts as a yielding driving connection and also stores up energy imparted vice formed of two parts, one a member mounted on the shaft for rotary movement therewith and longitudinalmovement thereof, and the other a driving member mounted on the other member non-rotarily thereof for positive driving therefrom and in unison therewith andfor sliding movement longitudinally thereof.

2. A drive for engine starters comprising a rotatable-screw shaft, and an operating device formed of two parts, one a sleeve screwthreaded on the shaft for rotary movement therewith and longitudinal movement thereof, and the other a pinion mounted on the sleeve non-rotarily thereof for positive driving therefrom and in unison therewith and for sliding movement longitudinally thereof.

3. A drive for engine starters comprising a motor driven shaft, a rotatable screw shaft rotated thereby and having a rotary movement independent thereof, and an operating device formed of two parts, one a sleeve screw-threaded on the screw shaft for rotary movement therewith and longitudinal movement thereof, and the other a pinion mounted on the sleeve-non-rotarily thereof for positive driving therefrom and in unison therewith.

4:. A drive for engine starters comprising amotor driven shaft, a rotatable screw shaft a motor driven shaft, a hollowscrew sha t I mounted theron and. capable of rotary movement therewith and rotary movement independent thereof, a screw device mounted on the screw shaft for positive rotary movement therewith and longitudinal movement thereof, said device being formed in two parts, one a control member screw threaded on the screw shaft and the other a driving member mounted to slide longitudinally on the control member and also mounted nonrotarily thereon for positive rotary movement therewith.

6. A drive for engine starters comprising a motor driven shaft, a hollow screw shaft mounted thereon and capable of rotary movement therewith and rotary movement independent thereof, a screw device mounted on the screw shaft for rotary movement therewith and longitudinal movement thereof, said device being formed in two parts, one a control member screw threaded on the screw shaft and the other a driving member mounted to slide longitudinally on the control member and also mounted non-rotarily thereon for positive rotary movement therewith, and yielding means resisting said longitudinal sliding movement of the driving member.

7. A drive for engine starters comprising a motor driven shaft, a hollow screw shaft mounted thereon and capable of rotary movement therewith and rotary movement mounted thereon and capable of rotary movement therewith and rotary movement independent thereof, a screw device mounted on the screw shaft for rotary movement therewith and longitudinal movement thereof, said device being formed in two parts, one a screw threaded sleeve threaded on the screw shaft and the other a pinion mounted on the sleeve non-rotarily thereof for positive driving in unison therewith and for longitudinal sliding movement thereof.

9. A drive for engine starters comprising a motor driven shaft, a hollow screw shaft mounted thereon and capable of rotary movement therewith and rotary movement independent thereof, a screw device mounted on the screw shaft for rotary movement therewith and longitudinal movement thereof, said device being formed in two parts, one a screw threaded sleeve threaded on the screw shaft and the other a pinion -mounted non-rotarily on the sleeve by keyment independent thereof, a screw device I mounted on the screw shaft for rotary movement therewith and longitudinal movement thereof, said device being formed in two parts, one a screw threaded sleeve threaded on the screw shaft and the other a pinion mounted non-rotarily on the sleeve by keying thereto for positive driving in unison therewith and for longitudinal sliding movement thereof, and a spring resisting said longitudinal sliding movement.

11. A drive for engine starters comprising a motor driven shaft, a hollow screw shaft mounted thereon and capable of rotary movement therewith and rotary movement independent thereof, a screw device mounted on the screw shaft for rotary movement therewith and longitudinal movement thereof, said device being formed in two parts, one a screw threaded sleeve threaded on the screw shaft and the other a pinion mounted non-rotarily on the sleeve by keying thereto for positive driving in unison therewith and for longitudinal sliding movement. thereof, said sleeve having at one end a disk, and a spring interposed between the disk and the pinion for resisting the longitudinal movement of the latter.

12. A drive for engine starters comprising a motor driven shaft, a hollow screw shaft mounted thereon and capable of rotary movement therewith and rotary movement independent thereof, a screw device mounted on the screw shaft for 'rotary movement therewith and' longitudinal movement thereof, said device being formed in two parts, one a control member screw threaded on the screw shaft and the other a driving member mounted to slide longitudinally on the control member and also mounted non-rotarily thereon for ositive rotary movement therewith,and a yielding driving -connection located in the train of mechanism between the motor and the driving member.

13. A drive for engine starters comprising a motor driven shaft, a hollow screw shaft mounted thereon and capable of rotary movement therewith and rotary movement independent thereof, a screw device mounted on 'the screw shaft for rotary movement there-.

with and longitudinal movement thereof, said device being formed in two parts, one a control member screw threaded on the screw shaft and the other a driving member mounted to slide longitudinally on the control member and also mounted non-rotarily thereon for positive rotary movement therewith, and a yielding driving connection betweensaid motor-driven'shaft and the hollow'screw shaft.

VINCENT BENDIX.

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