US1044736A - Internal-combustion engines. - Google Patents

Description

G. BBOW'EN. INTERNAL GOMBUSTION ENGINE.

' A'PPLIGATION HLBD GULVY 21,1907. 1,044,736. Patented Nev. w, 19E?.

2 SH'BBTSSHEET 2.

r end of shaft- 7, tends to urge i such occasions,

held in or out of engage- 9, the pinion bein the detent bolt 12 shown ment by means o in Fig. 3.

The gearing whereby the pump shaft may be driven by the engine in its normal operation, uncoupled for manual operation, an then recoupled 4in proper p crank shaft, constitutes the subject of this invention and such gearing comprises a slidin'g spur gear 13 permanently meshing with a gear 14 on the en ine countershaft 15, by which it is constant y driven so long as the engine is running. The slidin gear is idly mounted on a lon boss 9 of t ie hub of the bevel gear 9, whic gear is fast on the ump shaft as above stated, or the said sliding ear 13 may be mounted directly on the shaft 7 so as to slide thereon, if so desired. The proximate faces of the bevel gear 9, and sliding gear 13, are respectively formed or providedwit-h complementary clutch faces 16 and 17 shown in Figs. 4 and 5. These clutch faces or members are formed in the present instance of fiat circular disks, fastened by screws, to their respective gears, and one disk is provided with a transverse rib 18 which has its axis slightly oi center, while the other has a corresponding groove 19 similarly disposed oil center. The eccentric osition of the rib and groove is indicate in Fig. 5. A coil spring 20 conined between the back side of the sliding gear 13 and the cap plate 21 which/is secured to the the clutch members together. The rib will not engage in the groove, however, until the two members are in a position, in which the rib and groove are both eccentric on the same side and parallel to each other, the eccentricity of the rib and groove causing the clutch members to engage always in the same relative position. When 'so engaged the bevel gear and the sliding gear are positively interlocked in that relation, that is to say, neither can be rotated independently of the other in either direction. In this condition theA engine crank-shaft and the pumpingshaft are in their proper working relation, which relation is maintained under all conditions of operation, it being impossible for the fuel pump to lead or oat ahead of the engine, as might otherwise be the case on for example, as when the engine is slowed down under an increase of load. To facilitate the engagement of the rib and groove of the complementary clutch faces, the edges of each maybe slightly sloped as indicated.

The clutch faces are disengaged by shifting the sliding gear 13 against the pressure of the spring and for this purpose the. said gear is supplh l with a swivelcd handle rojecting to the exterior of the casing S and arranged to be grasped by thc operator.

In the form hereir. shown the swiveledhanhase with the ,over lthe erge of the plate,

Athe handle in die is intended to be applied to existing-ma-` chines and is therefore made for attachment ,to the4 sliding gears thereof with the least possible alteration of-the same, but it will be apparent that the handle or its equivalent means may be embodied in different forms and serve as a shifting means for the y gear in various manners. In the form shown, it comprises a bolt 23 tapped into the rear face of the gear near its center,`

24 swiveled to the bolt by in 25, working in a slot in the sleeve. The ree end of the sleeve is formed as a handle which overhangs the'cap plate 21 and projects through an annular openin between the capplate 21 and the surroun inv wall of the casing, in which annular o ening the handle revolves. The sleeve is a so provided with a flat or cut away area whic is so arrangd that it is adjacent to the ed e of the cap plate when the clutch is loc ed, and at such time keeps the sleeve from turning on the bolt asshown in Figs. 7 and 11. The flattened area 26 communicates at its inward end with a transverse or arcuate slot 27 cut in the sleeve and extending about half way around the same.

and a sleeve means of the The slot is of sutiicient width to accommodate f the edge of the cap plate so that when the gear 13 has been withdrawn from driving position, it may be secured in that position bv'turnin the sleeve until the slot passes the outer margin of the slot forming a radlal shoulder which engages the edge of the cap plate as a fixed abutment to hold the gear against the force of the spring 20, as clearly shown in Figs. 2, 6 and 9. i

In the operation of the foregoing appamtus. when it is desired to start the engine, the clutch faces are separated by means of obvious manner, so that the pumping apparatus is thereby disconnected from the engine. A turn of the handle will then lock the parts in this condition. The pump-shaft is then operated forwardly, by means of the crank and pinion 11, until a. proper charge of fuel has been thereby injected into one of the engine cylinders, and the engine has started up its own motion, whereupon the handle is re ased, and under the pressure of the sprin the clutch members enter again into thelr interlocking engagement. Such engagement does not take lace however until the sliding gear assumes a predetermined position bevel gear of the pump shaft, in which position the engine and pump are in proper working phase with each other, as ave described.

Having described my invention, what I claim and desire to secure b v United States Letters Patent is:

1. The combination in an internal combustion engine having a fuel pump and `gearing throu 'fliers I 2. In an internalv combustion englnehavh which said pump'is normally driven y the engine, of means for independently driving said pump, a clutch included in said gearing comprising positively interlocking clutch members, adapted to interlock against movement in either direction, a spring for closing said and means revolving With one of said memfor holding said clutch members open.

ing a fuel pump and gearing-whereby said pum-p is ,driven from the crank-shaft, the combination with a clutch included in said gearing, comprising clutch members adapted tno form a driving connection interlocked against relative movement in either direction, between said pump and crank-shaft in a predetermined mutual relation, the movable clutch member a handle for separating clutch member and also automatically vrestoring it position, and independent ing said'pump. p

In an internal combustion engine having a fuel pump and gearing whereby the same is driven from the crank-shaft, the combination with a sliding gear included in said gearing and being shiftable into and it from the fixed with means for 'to interlocking means for drivout of ldriving,engagement with said pump,

the shifting `gear being provided lwith manually operable means for shifting it out gearv shifting means.

oi' driving engagement with the pump and also with means for automatically restoring it to driving engagement and means for driving said pump independently of said 4i. In an'internal combustion engine having a fuel pump and gearing whereby the same 'is driven from the crank-shaft, the combinationv with a, positively interlocking -fspring pressedv clutch included in said gearmgand automatically forming as it becomes 'engaged a positively interlocked driving connection for said pump in a predetermined invariable relation with respect to the `said crank-shaft, means for holding said members.

being provided withv independently clutch in opened or disconnected condition, and means for independently driving said pump.

i 5. In an internaling a fuel pump and gearing whereby the same is driven by the crank-shaft, the combination of a clutch included in said gearing, adapted for determining and maintaining a definite relative angular position ,of said pump and crank-shaft, a swiveled locking handle for opening said clutch, means coperatingl therewith to lock said clutch in' its opened condition, and means for independently driving said pump'.

combustion engine hav- A 6. The combination'in an internal combustion Lengine having a fuel pump and gearing throufrh which said pump is normally driven' the engine, of means for driving said pump, a clutch included in said gearing comprising clutch members adapted' to positively interlock against relative movement in either direc-v tion -and in a single fixed relation only, a spring urging the movable clutch member toward the fixed member, means for separating and'holding said clutch members disengaged, and manually operable means for releasing said holding means to permit said clutch members to automat-icallyinterlock in `the said relation.

7 `In an internal combustion engine having a fuel pump and gearing through which the'same is normally driven by the engine, the combination of a clutch' included in said gearing and formed of clutch-members bear-

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