US1331798A - Starter for explosive-engines - Google Patents

Description

W. BOLLHEKMER.

STARTER FOR EXPLOSIVE ENGINES.

APPLICATION FILED FEB. 26. p919.

1,331,798. Patented Fb.24,1920.

' ent device is particularly also applicable to stationary engines. 15.

- of-operation of such devices,

lated and unlikely to UNITED STATES; PATENT OFFICE.

WILLIAM BOLLHEIMER, or DAYTON, 01110.

STARTER FOB EXlLOSIVE-ENGINES.

Specification of Letters 2mm.

Patented i i-2e24, 1920.

Application filed February 26,1919. Serial No. 279,372.

To all whom it may concern:

Be it known that I, HEIMER, citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Starters for Explosive-Engines, of which the following is a specification. This invention relates tostarting or crankingdevices for explosive engines, comautomatically and instantly releasing the'actuatingelement, in the event of back fire or premature"explosion, at any mids'troke position of the actuatingelement.

A further object is to provide such a device which may be easily and quickly installed upon existing automobile or other explosive engines, without materially chang ing or modifying any of the parts thereof,

' A further ob ect is .to provide a-device which will impart to the crank shaft of the engine a quick initial movement with'minimum effort of theoperator, and to provide improved means for automatically disengagingthe actuating element .at'the limit of its stroke in either direction.

With the above primary and other incidental objects in view as will .more fully appear in the specification, the. invention consists of the features .of construction, the parts and combinations thereof, -and the mode of operation, or their equivalents, as hereinafter described and set forth. in the claims.

Referring to the "drawings,Figure 1' is a l the extended end ofthe sleeve 8. Y

perspective view, somewhat diagrammatic, showing the relative locat on and arrangement of the parts of the. starting dev ce forming the subject matter hereof upon an automobile. Fig. 2 is a front elevation of the starting mechanism. Fig. 3 is a rear eleration thereof. Fig; 4 is a side elevation,

WILLIAM BOLL- vertical sectional view.

crank 5, which, however is 1 fan belt pulley channeled periphery viewed from the left ofFigt-Q. 5 is a Like parts are indicated by similar characters of reference throughout the several views.

In the drawingthe vehicle has been illustrated by dotted lines in Fig. 1 in which l is the body of the vehicle, '2 the hood, 3' the radiator and 4 the chassis Portions of the vehicle have been shown broken away to disclose within the starting apparatus forming the subject matter hereof. The starting apparatus is operated enframe bars.

tirely independent of the ausual starting left mounted in its. bearing 6, ready for use in any emergency..

In applying-theapparatus to the motor of. a vehicle of the type shown in Fig. 1, and

known asa Ford automobile-, the original found upon the engine shaft 18 removed, and a sleeve 8 is substituted therefor. surrounding which I is a substitute fan belt pulley 9. The 'sleeve 8 is counterbored at its inner end to receive the end of the engine crank shaft, beyond which the sleeve 8 extends. fan belt pulley 9 maybe secured tothe crank. shaft in any suitable manner, such The sleeve and substitute as by a transverse .pin 10. The sleeve 8jis 7 reduced in diameter a short distance forward of the fan belt pulley.9.and at its forward extremity is provided with a series of clutch teethill for engagement of the crank 5 for Fixedly. secured upon the emergency use. sleeve 8' and abutting upon the shoulder formed by the reduction of thediamcte'r of the sleeve is a ratchet wheel 12. Loosely ournaled upon the projecting portion of the sleeve 8 and adjacent to the ratchet wheel 12- 1s an actuating member comprising a hub portion 13, a channeled rim 14: and an' arm 15 connecting the rim and hub portions.

The hub portion 13 has been shown pro 7 vided with a'bearing bushing 16. .The actuator'is secured in position by a split ring or collar 17 sprung into a peripheral groove in The actuator is oscillated about the sleeve 8 by means of a flexible connection 18, which may ' the spring I lever 22 located in proximity to the drivers position. The operating lever 22, may be either manual or pedal operated, and may be of any desired constructlon. That shown 1n Fig. 1 is one commonly employed for this purpose. The preferred form of actuatingmechanism is that by which the actuating element is given a uniform impulse at each operation.

Pivoted to the rear side of the arm 15 of the actuating element is a pawl 23, provided ywith'a spring 24, which normally tends to oscillate the pawl 23 into engagementwith the teeth of the ratchet-wheel 12. As shown in the drawing, the ratchet pawl 23 is somewhat triangular in form. 'It is obvious however, that this shape of the pawl is not essential. The pawl is .actuated by 24, into engagement with the ratchet 12, at the beginning of the stroke of the actuator and is automatically disconnected from the ratchet 12 at the limit of suchstroke. To effect this disengagement at either limit of the stroke of the actuating member and also. at any intermediate POSI- tion, there is provided upon this pawl 23, a

projecting. stud carrying a roller 25, which extends into the plane of operation of an varcuate movable cam bar 26. The cam bar .26 is preferably pivoted at 27 to any suitable support-such as the engine casing, or'in'the case of the Ford engine, it may be attached to the timer bracket, which is conveniently located .for this purpose. The arcuate cam bar-at its free end rests upon the edge ofthe pan or guard, which extends beneath the crankshaft. ,Cam faces 28 and 29 are provided upon the outer or upper periphery of the arcuate cam bar 26, with which the antifriction roller 25,. carried .by the pawl 23, en-

gages at either limit of. its stroke, whereby .the, pawl 23 is oscillated about its pivotal connection 23* with the, arm 15, to the pawl from the ratchet 12.

disengage This serves to automatically disengage the pawl at .eitherilimit ofits stroke, and to holdthe I {pawl outof engagement with the ratchet between'successive operations;

One of the primary objections to starters of this type heretofore devised has been the danger and the breakage of parts incident 'toa. premature explosion, or backfire of the .engine, whereby the motor crank shaft is rotated in reverse direction, or in opposition to the movement of the starter while the latter is engaged therewith. To overcome this difficulty, means are hereinprovided for automatically disengaging the pawl 23 from the ratchet 12 at any'midstroke point in'the event of any such premature explosion or the reversal of the direction of rotation of the motor shaft. To this end the cam lever 26 is provided with aniupward extending fixed arm 30 adjacent "to its free end,.to which fixed arm, 30 is as the ratchet is rotated forwardly with the ratchet wheel 12;

.sion or backfire, whereby :arm about its pivotal, connection 31% against the tension ofv a spring34 to likewise with draw thedetent finger 33 fromsengagement The operated position of the pawl 23 and. the swinging arm is shown bydotted lines in Fig. 3. In the .event however-of a prematureexplothe crank shaft of'the motor: andthe ratchet wheel 12 carried thereby, are rotated in a reverse direction the ratchet wheel 12 .by the engagepivotal connection 27 causing. the I curvilinearface of the bar intermediate the cam faces 28 and 29"to engage the anti-friction roller 25, of the pawl 23,. at any mid-stroke vment of the detent finger 33therewith, tends to-elevatethe arcuate cam bar 26 about its position atwhichthe pawlmaybe found. at

the momentof backfire, and so liftthe pawl 23 against the tension ofits spring24, .out of engagement with the ratchetzqwheel 12. A .stop. lug 35, carried by the, swinging cam bar 26, serves tolimitthe movement of the swinging 3113111131 toward the ratchet wheel .12, under the influence of the spring 34. vPAs the cam b-ar ;26-is'elevatedunderthe influence of the detent finger 33,

ing. the actuating pawl 23, the. actuating .element Wllll advance idly, immediately to its forward position, .whereupon "the engage :ment ofzthe anti-friction. roller125 with the a cam faces 29...and;32, will automatically disengageand .hold .both the detent finger 33 and the actuating pawl 23, out of engagementwith'theratchet wheel 12. This disengaging movement occurs instantaneousl xuponthe-reversaliof the ratchet l2. The

ratchetil2. by its reversemovement elevates the intermediate portion of the cam bar 2 6 into the path of theroller 25, thus freeing 7 :upon reverse rotation of the ratchet 12,'thereby disengagthe pawl 23, and permitting-the actuator to advance instantly to the limit of its; stroke, thereby freeing. the. detent finger '33, thus preventing [breakage of the pawls or the ratchet teeth and avoiding the. danger. incident-to the violent projection of the operativelever 22 rearward or toward the'operatorjwhile the operators hand or foot is engaged therewith.

Fromtheabove description it will be app1 ass 1,798

parent that thereis thus-provided adevice. of the character described, possessing the particular features o'fjadvantage before enu merated as desirable but which, obviously, is

susceptible of modification in its form, proportions, detail construction and arrangement of parts,

advantages.

While in order tocomply with the statute, the invention has been described in language;

the legitimate and valid scope of the .ap-

pended claims.

Having thus claim: 7

1. A starter for internal combustion enines wherein a. ratchet wheel operatively :onnected with the crank shaft of the endescribed my invention I gine is intermittently engaged by a pawl' carried by an oscillatory carrier to which an oscillatory movement is given by suitable operatlng means, characterized by an arcuate movable bar normally positioned concentric with the path of travel of the pawl and means operated by the reversal of direction of rotation of the shaft to move the arcuate bar to eccentric position in the path of travel of the pawl for automatically disengaging.

said pawl at any point in the strokeof said carrier upon a reverse movement of the engine shaft.

2.'A starter for internal combustion mo tors of that character embodying a ratchet operatively connected with the crank shaft of the motor, an oscillatory pawl carrier mounted adjacent to the ratchet, a pawl carried thereby and arrangedto engage the teeth of the ratchet and an operating element for the pawl carrier, characterized by a cam bar extending between the limits of the stroke of said pawl and having cam surfaces thereon engaged by the pawl at either limit of its stroke whereby the pawl is disengaged from the ratchet.

3. A starter for nternal combustion motors comprlsmg, a ratchet operatively con-- nected with the motor shaft, an oscillatory pawl carrier mounted adjacent thereto, a

pawl carried thereby and adapted to opera tively enga e with said ratchet, means for oscillating the carrier, a normally stationary trip member and means operated by the of the direction of rotation of the a pawl carried by an oscillatory pawlcarrier actuated at the will of the operator,characterized by asingle disengaging member hav-f reversal shaft to actuate the trip member for disconnecting the pawl from theratchet at indeterminate points in its path of travel. I

4. A starter for internal combustion en without departing from the principle involved or sacrificing any of-its- "ratchet for shifting the disengaging gines wherein a ratchet; operatively connected with the motor shaft is operated by a pawl carried by an oscillatory pawl carrier actuated at the will of the operator, characterized. by. a normally stationary cam .member movable into the pathof travelof the pawl for disengaging theactuatingpawl at anymid; stroke positionby the reverse operation of the motor.

. 5; A-nstfarter for internal combustionengi nes,-. =wherein a ratchet operatively con- 1 1ectedQWiththe motor shaft is operated by @apawlqcarried by an oscillatorypawl car rier' actuated at the will of the operator,

characterized by a pawl disengaging element normally inoperative to disengage the pawl in mid stroke position, a second pawl carried thereby enga ing said ratchet and adapted upon reversa of the normal direction of movement of the ratchet to move said disengaging element to operative position. v r

6. A starter for internal explosive enines wherein a ratchet operatively coniiected with the engine shaft is operated by apawl carried by an oscillatory pawl carrier actuated at the will of the operator, characterized by a normally stationary disengaging element, adapted to disengage the pawl at either limit of. its stroke, and means to automatically shift said disengaging ele ment to effect the disengagement of the pawl in amid stroke position.

7. A starter for lnternal combustionengines wherein a ratchet operatively connected with the engine shaft is operated by a pawl carried by an oscillatory pawl carrier actuated at the will of the operator,

characterized by a second pawl also engageable with said ratchet from which it is disengaged upon movement of the ratchet in one direction, the second mentioned pawl being adapted to effect the disengagement of the first mentioned pawl upon areverse movement of the ratchet.

8. A starter for internal combustion enines wherein a ratchet operatively coni iected with the engine shaft is operated by a pawl carried by an oscillatory pawl carrier actuated at the will of the operator,

characterized by a movable pawl disengaging element normally positioned out of the mid stroke path of travel of the pawl, and

means controlled by the movement of the element into the mid-stroke path of the awl whereby the pawl will be disengaged rom the ratchet.

9. A starter for internal combustion engines wherein a ratchet operatively connected with the engine shaft is operated by ing thereon cam faces pro ecting into the from't-he ratchet, a second pawl carried by ment with the ratchet.

path of travel of the-pawl at either limit of its -stroke adapted upon engagement by said pawl to lift the pawl out'of engagelO. A starter for internal combustion en- 7 gines wherein, a ratchet operatively concharacterizedby apivoted lever havmg cam faces; thereon engaged by said pa wl'at either.

limit of its stroke to disengagethe pawl said lever and engaging'said ratchet where by upon a reverse m'ovement of the ratchet the lever will be oscillated-to disengage the first mentioned-pawl at a mid stroke position.

In testimony whereof, I V have hereunto set my handvthifs -1919. r

-WILLIAM BOLLI-IEIMER.

Witnesses'r EWIVLLIAM-Y'A. -SWA-NEY, M. E. -HQDDERFIELD.

11th :dayqof F ebrnary A. D. 20

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