US1652920A

US1652920A - Engine starting device

Info

Publication number: US1652920A
Authority: US
Publication date: 1927-12-13
Anticipated expiration: 1944-12-13

Description

Dec. 13, 1927.

M. WILD ET AL ENGINE STARTING DEVICE Filed Aug. 30. 1921 2 Sheets-Sheet 1 Invent ofis:

Dec. 13, 1927.

' 1,652,920 M. WILD ET AL ENGINE STARTING DEVICE Filed Au. :0, .1921 2 Sheets-Sheet 2 FMLAQ Ihventors:

Max \A/iid.

Otto Goldberg. byfiy/ Their Attorney.

Patented Dec. 13, 1927.

sis sires MAX WILD, 0E srurr AE'r, AND or'ro GOLDBERG, 0F BERLILFNEUKOLLN, GERMANY, AssIGNoEs, BY MEsNE ASSIGNMENTS, T0 ECLIPSE MACHINE COMPANY, OF ELMIRA HEIGHTS, NEW YORK, A CORPORATION OF NEW YORK.

ENGINE-STARTING DEVICE.

Application filed August 30, 1921, Serial No. 496,925, and in GermanyAugust 15, 1916.

Our invention relates to engine starting devices, such as are commonly employed in starting the internal combustion engines of motor vehicles or the like, and has for its general object an improved construct-ion and arrangement of parts.

More particularly our invention relates to engine starting devices which are actuated by a motor and have a prnion or drivlng member adapted for engagement wlth a corresponding engine driven member (generally the fly-wheel) which members" as a rule are arranged for coupling, starting and uncoupling successively in an automatic manner.

Such devices, heretofore, have been either long and bulky or else require a large number of costly accessory parts to enable them to function as desired.

A specific object of our invention isthen to provide the necessary mechanism for such devices in a comparatively short structure and reduced to the simplest elements.

For a more complete understanding of the nature and objects of our invention reference should be had'to the following detailed description when taken no connection with the accompanying drawing in which:

Fig. 1 is a view, partly in section, of an engine starting device constructed in accord ance with our invention; Fig. 2 is a section taken on the line aa, in Fig. 1; while Fig. 3 shows a detail; Fig. 1 is a View like Fig.

' '1 of a modified form of our engine starting device; Fig. 5 is a section on the line b?) of Fig. 1; and Fig. 6 is a view of a detail.

Referring now to Figs. 1 to 3 of the drawing, 1 is an engine driven member, 2 is a driving member adapted to cooperate with and drive the engine member 1 for starting the engine, but is normally out of cooperation therewith, and 3 is a member opera- .tively connected to a shaft 1 of a motor 5.

The members 2 and 3 have a slot and pin connection, the slot 6 (Fig. 3) being inclined with different inclinations 7 and 8 in different parts of its length for a purpose whichwill be set forth hereinafter, although if desired, the inclinations of the slot may be constant throughout its length as shown in Fig. 6. By reason of the inclined slot and pin connection between the members 2.

end 3, the driving member 2 is operatively connected to the member 3 and to the shaft or pinion 9 and a hollow cylindrical portion 10. The cylindrical portion 10 is telescoped with respect to the member 3, which is also shown as a hollow cylinder. When the motor starts, the telescoped parts are extended and the driving end of the pinion engages the engine driven member 1 to drive the same and thus crank the engine. In the construction illustrated, it will be seen that the driving end 9 of the driving member extends beyond the motor shaft and does not ride thereon, but is supported entirely by the cylindrical portion 10.

Referring to Figs. 1 to 3 more in detail, the motor 5, preferably an electric motor, has its shaft 4 terminating in a cone on which is mounted the cylindrical member 3 through the cooperation of sleeve 11; the cylinder or member 3 being provided with the inclined guide-slot 6 and secured to the motor shaft by means of the nut 12. The pin or roller 13 on the inner cylindrical portion or cylinder 10 of the driving member engages the slot 6, the outside of which cylthe inner cylinder 10 is formed a groove 14:

in which are mounted the coupling members or dogs 15. The cylinder 10 is also closed in by a plate 16, which prevents the entrance of impurities, and carries the driving end or pinion 9.

The cylinders 3 and 10 are surrounded by a casing 17 which terminates in a bushing 18. In the bushing is mounted a yielding detent in the form of a ring 19 provided with an inner toothed portion. The ring 19 is pressed by a plurality of springs 20 and in the position of rest is engaged by the dogs 15 on the inner cylinder 10.

The method of operation of the device is as follows: In the position of rest the dogs 15 are in engagement with the teeth of the ring 19. On the closing of the circuit to the electric motor it begins to rotate, but the cylinder 3 offers resistance thereto, since it is connected by means of the pin or roller 13 to the inner cylinder 10 and the latter is causes a longitudinal displacement of the inner cylinder 10 by reason of the guide-slot 6, said displacement being facilitated and determined in further movement by the sharp bend in the slot 6 from the portion 8 to the portion 7, so that the pinion 9 can come into engagement with the teeth of the fly-wheel. By making the slot 6 with the portion 8 inclined at a large angle with reference to the axis of the driving member and with the portion 7, which is the position of the slot occupied by the pin 13 when the driving member is entering into cooperation with the engine member 1, inclined at a smaller angle with respect to the axis of the driving member, the entrance of the pinion 9 into mesh is easy with a low pressure. In other words, by virtue of the different inclinations in the slot, the relative rotation of the actuating member and the driving member causes the longitudinal movement of the driving member in a variable ratioin the present instance, such relative movement giving the driving member an initial longitudinal movement at a slow speed and a subsequent longitudinal movement at an increased speed. If the engagement does not take place smoothly and one tooth strikes against another, then the inner cylinder, with the pinion, will rotate slightly under the influence of the toothed ring 19 and the springs 20, in order to insure the proper engagement of the pinion 9 and gear 1. After the engagement has been made, the coupling members 15 come out of engagement with the teeth of the ring 19 by the members 15 moving out from under the ring 19, so that the lock is released and the electric motor, rotating freely, can transmit to the fiy-wheel the necessary speed for starting. After the gas engine has started and reaches a certain speed, a person can neither voluntarily nor inadvertently actuate the starting device again before the motor stops, since the coupling members 15 are prevented from reengaging the teeth of ring 19 by centrifugal force. The members 15 remain inoperative and cannot again engage the teeth of ring 19 until the motor stops.

In the modifications shown in Figs. 4 to 6, the driving member 2 has a driving end 9' and a cylindrical portion consisting of two concentric cylindical members 21 and 22 keyed together for relative longitudinal movement, in place of the single cylindical portion 10 of Figs. 1 to 3 inclusive. The advantage of dividing up this cylindrical portion of the driving member in this way will be pointed out hereinafter. The slot 6 is formed in the cylinder 21 and has a constant inclination throughout its length without the sharp end referred to above.

Here the shaft 4. of the starting electric motor 5 ends, as shown in Fig. 4, in a cone, on which is keyed a member 3. The member 3 is similar in shape to the member 3 of Fig. 1 and is fastened to shaft 4 by means of the nut 12. Formed in the cylinder 3 is the slot 6, in which rolls a guidc-- as an abutment for the spring 24. The cylinder 21 has a bushing in which is formed a groove 14 in which are mounted the coupling members or dogs 15'.

On the inner surface of the cylinder 21 is mounted the cylindrical portion 22 of the driving member 2, which is adapted, however, to be shifted only in a longitudinal direction because of the key or guide member 25. The driving member 2 has a driving end or pinion 9. On the casing of the electric motor is located a firmly seated casing 17' which surrounds the device and which is toothed on the interior at 26, in which teeth engage the coupling members or dogs 15. A cover plate 16 is fastened to the driving member, which prevents the entrance of impurities and prevents the driving member 2 from being forced out-by the force of the spring 2 1.

The method of operation of the device shown in Figs. 4 to 6 is as follows: Assuming that the main switch is closed and the electric motor begins to rotate. the member 2 resists the movement of rotation, since it is held by the toothed rim through the agency ofthe pin 13, the cylinder 21 and the coupling members 15. By this means a longitudinal shifting of the cylinder21 is effected by reason of the resulting pressure of the guide slot 6; the pinion 9 comes into engagement with the teeth of the fly-wheel member 1. After engagement, however. the coupling members 15 are disengaged from the inner toothed portion 26 by the members 15 moving out from under the ring 26 and the electric motor can rotate freely and transmit to the fly-wheel the speed necessary for starting.

This simple sequence of processes takes place only when the teeth of the pinion come readily into engagement with those of the fly-wheel rim. The device acts just as re liabl'y, l'lOW(W(?1..lf the teeth strike one upon the other. In this case, after the teeth meet end to end, the pinion 9 will be arrested, but the cylinder 21 will, however, be moved along farther in a longitudinal direction. In this process the spring 24 is compressed. and when the coupling members 15 are released from the inner toothed portion, the pinion is rotated as the motor starts and, by the force of the compressed spring 2 1. is thrown, in the next favorable position, into the teeth of the fly-wheel rim.

After the gas engine has started and starting device again before the motor stops, since the coupling members 15. are turned back into the groove 14 through the effect of centrifugal force, and only come out again when the motor stops, and reestablish the connection with the inner toothed portion 26 which is necessary for the renewed actuation of the device.

A further advantage of this construction consists in the possibility of providing the engagement-making pinion with the smallest possible number of teeth for the purpose of favorable transmission conditions, since there restrictedin the choice of recognized equiva- I lents except as defined in our claims hereunto annexed.

What we claim as new and desire to secure by Letters Patent of the United States, is

1. In a starter for gas engines and the like comprising, in combination with a driven member operatively connected with ancengine, a driving member adapted to cooperate withand drive the other member but normally out of cooperation therewith, a member cooperating with said driving member, said driving member and said member cooperating therewith having a slot and pin connection, said slot having different inclinations in different parts of its length.

2. In a starter for gas engines and the like comprising, in combination with a driven member operatively connected with an engine, a driving member adapted to co operate with and drive the other member but normally out of cooperation therewith, a

member cooperating with said driving member, one of said last mentioned members having a slot and the other of said members having a pin cooperating with said slot, said slot having different inclinations in different parts of its length.

3.' In a starter for gas engines and the like comprising, in combination with a driven member operatively connected with an engine, a driving member adapted to cooperate with and drive the other member but normally out of cooperation therewith, a member cooperating with said driving member, one of said last mentioned members having a slot and the other of said members aving a pin cooperating with said slot, the portion of said slot occupied by said pin when said driving member is entirely out of cooperation with said driven member being inclined at a large angle with respect to the axis of said driving member, and the portion of said slot occupied by said pin when said driving member is entering into cooperation with said driving member being inclined at a smaller angle with respect to the axis of said driving member.

4. In a starter for gas engines and the like, in combination, a motor; having a shaft, a driven member, a driving member adapted to cooperate with and drive the other memher but normally out of cooperation therewith, said driving member having an extending portion of a diameter greater than that of such driving member, a member concentric with the motor shaft and operatively connected thereto, said extending portion of said driving member being encompassed by and operatively connected to said member mounted on the motor shaft and having a sliding fit for longitudinal movement thereof and rotary movement therewith, said extending portion and last named member being normally nested within each other concentrically of the motor shaft.

5. In a starter for gas engines and the like, in combination, a motor having a shaft, a driven member, a driving member adaptedto cooperate with and drive the other member but normally out of cooperation therewith, said driving member having a hollow extending portion of a diameter greater than that of such driving member, a member con centric with the motor shaft and operatively connected thereto, said extending portion of said driving member being encompassed by and operatively connected to said member mounted on the motor shaft and having a sliding fit for longitudinal movement thereof and rotary movement therewith.

6. In a starter for gas engines and the like, in combination, a motor having a shaft, a driving member having a driving end extending beyond the end of said shaft and a hollow cylindrical portion of a diameter greater than that of such driving member, said cylindrical portion being operatively connected to the end of said shaft and having a sliding fit for longitudinal movement thereof and rotary movement therewith.

7. In a starter for gas engines and the like, in combination, a motor having a shaft, a member of shell form concentric with and encompassing said shaft and driven therefrom, a. driving member having its driving end extending beyond the end of said shaft and a hollow portion concentric with and telescoping the end of said shaft and operatively connected to said first mentioned member and having a sliding fit for longitudinal movement thereof and rotary movement therewith, said portion being of a diameter greater than that of said driving end of the driving member.

8. In a starter for gas engines and the like, in combination, a motor having a shaft, a member of shell form concentric with and surrounding the end of said shaft and driven therefrom, a driving member having its driving end extending beyond the end of said shaft, said driving member having a hollow portion concentric with and telescoping the end of said shaft and telescoped with respect to and operatively connected to said first mentioned member for longitudinal movement thereof and rotary movement therewith, said portion being of a diameter greater than that of said driving end of the driving member.

9. In a starter for gas engines and the like, in combination, a motor having an end head and a shaft journaled in said end head, said shaft extending beyond the same, a member of shell form concentric with and surrounding the end of said shaft and driven therefrom, and a driving member having its driving end extending beyond said end of said shaft, and a portion concentric with and telescoping the end of said shaft and operatively connected to and having a sliding fit with said first mentioned member for longitudinal movement thereof and rotary movement therewith, said portion being of a diameter greater than that of said driving end of the driving member.

10. In a starter for gas engines and the like, in combination, a motor having an end head and a shaft journaled in said end head, said shaft extending beyond the same, a member of shell form concentric with and surrounding the end of said shaft and driven therefrom, and a driving member having its driving end extending beyond said end of said shaft, said driving member having aportion concentric with and telescoping the end of said shaft and telescoped and having a sliding fit with respect to and operatively connected to said first mentioned member for longitudinal movement thereof and rotary movement therewith, said portion being ofa diameter greater than that of said driving end of the driving member.

11. In a starter for gas engines and the like, in combination, a cylindrical member, means whereby said cylindrical member is driven, a driving member having a driving portion and a hollow cylindrical portion, a second cylindrical member mounted in said first mentioned cylindrical member for longitudinal moven'ient thereof and rotary movement therewith, said cylindrical portion of said driving member being mounted in said second cylindrical member.

12. In a starter for gas engines and the like, in combination, a cylindrical member, means whereby said cylindrical member is driven, a driving njien'iberhaving a driving portion and a hollow cylindrical portion, a second cylindrical member mounted in said first mentioned cylindrical member for longitudinal movement thereof and rotary movemen therewith, said cylindrical portion of said driving member being mounted in said second cylindrical member for limited longitudinal motion with respect thereto.

13. In a starter for gas engines and the like, in combination, a cylindrical member, means whereby said cylindrical member is driven, a driving member having a driving portion and a hollow cylindrical portion, a second cylindrical member mounted in said first mentioned cylindrical member forlongitudinal movement thereof and rotary movement therewith, said cylindrical portion of said driving member being mounted in said second cylindrical member for limited yielding longitudinal motion with respect thereto.

ll. In a starter for gas engines and the like, in combination, an engine member, a cylindrical member, means whereby said cylindrical member is driven, a driving member lmving a driving portion and a hollow cylindrical portion, a second cylindrical member mounted in said first mentioned cylindrical member for longitudinal movement thereof and rotary movement therewith, said cylindrical portion of said driving member being mounted in said second cylindrical member for limited longitudinal motion with respect thereto, and a spring urging said driving member toward said engine member. i

15. In a. starter for gas engines and the like, in combination, an engine member, a cylindrical member, means whereby said cylindrical member is driven, a driving mem ber having a driving position and a hollow cylindrical portion, a second cylindrical member mounted in said first mentioned cylindrical member for longitudinal movement thereof and rotary movement therewith, said cylindrical portion of said driving member being mounted in said second cylindrical member for limited longitudinal motion with respect thereto, and a spring between said driving member and said second cylindrical member for urging said driving member toward said engine member.

16. In a starter for gas engines and the like, in combination, a cylindrical member, means whereby said cylindrical member is driven, a driving member having a driving end and a cylindrical portion, said cylindrical portion of said driving member being telescopcd and having a sliding fit with re spect to said cylindrical member and operatively connected thereto for longitudinal movement thereof and rotary movement therewith.

17. In a starter for gas engines or the like, in combination, a driven member, a member, means whereby said last mentioned member is driven, a driving member adapted to cooperate with and drive said first mentioned driven member but normally out of cooperation therewith, said driving member being operatively connected to said second ment thereof and rotary movement therewith, and means for normally holding said driving member against rotation, said means being rendered inoperative by centrifugal force when said driving member reaches a certain speed.

18. In a starter for gas engines or the like, -1n COIIlblDatlOIl, a drlven member, a member,

means whereby said last mentioned member is driven, a driving member adapted to cooperate with and drive said first mentioned driven member but normally out of co-operation therewith, said driving member be ing operatively connected to said second mentioned member for longitudinal movement thereof and rotary movement therewith, and a centrifugally operated ratchet mechanism for normally holding said driving member,

againstrotation, said mechanism being rendered inoperative bycentrifugal force when sald 'drlvlng member reaches a certa1n speed.

19. In a starter for gas engines and the like, in combination, a motor having a shaft, a 'drivingmemberhaving a driving end eX- tending beyond-the end of said shaft and a hollow cylindrical portion, said cylindrical portion being operatively connected to the end of said shaft for longitudinal movement thereof and rotary movement therewith, and means for normally holding the driving member against rotation.

20. In a starter for gas engines and the like, in combination, a motor having a shaft, a driving member having a driving end extending beyond the end of said shaft and a hollow cylindrical portion, said cylindrical portion being operatively connected to the end of said shaft for longitudinal movement thereof and rotary movement therewith, and means for holding the driving members against rotation, said means being operative when the driving member is disengaged from the driven member and inoperative when it is engaged therewith.

21. In a starter for gas engines and the like, in combination, a motor having a shaft, a drivin member having a driving end extending eyond the end of said shaft and a hollow cylindrical portion, said cylindrical 'portion being operatively connected to the end of said shaft for longitudinal movement thereof and rotary movement therewith, a stationary casing, and means cooperatmg between such casing and the (lIlV- ing member for normally holding such driving member against rotation, said means comprising a ratchet ring on the casing, and ratchet teeth carried by the driving member.

23. In a starter for gas engines and the like, in combination, a motor having a shaft, a driving member having a driving end extending beyond the end of said shaft and a hollow cylindrical portion, said cylindrical portion being operatively connected to the end of said shaft for longitudinal movement thereofand rotary movement there with, and a clutch for normally holding the driving member against rotation, one member of the clutch being fixed and the other being carried bythe driving member.

24. In a starter for gas engines and the like, in combination, a motor having a shaft, a driving member having a driving end extending beyond the end of said shaftand a hollow cylindrical portion, said cylindrical portion being o'peratively connected to the end of said shaft for longitudinal movement thereof and rotary movement therewith, and'a clutch for'normally holding the driving member against rotation, one member of the clutch having a limited yielding rotary movement and fixed with respect to longitudinal movement, and the other clutch member being carried by the driving member.

25. In a starter for gas engines and the like, a drive including an actuating member, and a driving member comprising an element normally out of engagement with a member of the engine to be started but adapted to be moved into such engagement, and also comprising an extension of shell form into which a part of the actuating member projects, and having a slot and pin connection with said actuating member.

26. In a starter for gas engines and the like, a drive including an actuating member, and a driving member comprising an element normally out of engagement with a member of the engine to be started but adapted to be moved into such engagement, and also comprising an extension of shell form into which a part of the actuating member projects and having a slot and pin connection with said actuating member, said extension being adapted to telescope the actuating member.

27. In a starter for gas engines and the like, a drive including an actuating member, and a driving member comprising an element adapted to engage a member of the engine to be started, said element being normally out of engagement therewith but adapted to be moved into such engagement, and also comprising an extension of shell form and having a slot and pin connection with said actuating member, said slot having different 7 operating between such casing and the drivinclinations in difl'erent parts of its length.

28. In a starter for gas engines and the like, a drive including an actuating member, and a driving member comprising an element adapted to engage a member of the engine to be started, said element being normally out of engagement therewith but adapted to be moved into such engagement, and also comprising an extension of shell form and having a slot and pin connection with said actuating member, said extension having the slot which has different inclinations in different parts of its length, and the actuating member having the pin.

29. A starter for gas engines including a driving member mounted for longitudinal movement for engagement with a part of the engine to be started, an actuating member and means cooperating with said members for causing said longitudinal movement in a variable ratio.

30. A starter for gas engines including a driving member mounted for longitudinal movement for engagement with a part of the engine to be started, an actuating member,

and means cooperating. with said members for giving such driving member an initial longitudinal movement at a slow speed and a subsequent longitudinal movement at an increased speed. Y

31. A starter for gas engines including a driving member mounted for longitudinal movement for engagement with a part of the engine to be started, and an actuating member drivingly connected thereto by pin and slot connection, such slot being inclined whereby relative rotation of said members causes longitudinal movement of the driving member in a variable ratio.

32. An engine starter drive comprising a driving shaft, a pinion freely mounted for rotary and axial movement on said shaft and a pin and cam connection between said shaft and pinion, the cam being so shaped that when the shaft rotates with respect to the pinion, the cam coacts with the pin to move the pinion axially at a gradually and progressively increasing velocity until the pinion is in mesh with a gear of the engine to be started.

In witness whereof, we have hereunto set our hands this second day of August, 1921.

' MAX WILD.

OTTO GOLDBERG.