US1055086A - Means for regulating the stroke of pumps. - Google Patents

Description

ERIK ANTON RUNDLF, oE...sT`ooKHoLM, SWEDEN.

MEANS Eon EEGULATING THE STROKE or rUMPs.

Specification of To all ui/winz'f may concern.' Y

Be it knownthat I, ERIK ANTON RUND- a subject of the King of Sweden, residing. at- Stockholm, lin the Kingdom of Sweden, have invented new and useful Improvements in Means for Regulating the` Stroke of Pumps, of which the following: is a specification7 reference being had to the drawing accompanyingand forming a part hereof.l

This invention relates to means for varying the length of stro-ke of pumps, especially for-internal combustion engines, and

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more particularly to stroke varying devices of the said kind in which the pumppiston or driven member is actuated by a reciprocating membersupported and mounted so as to be able to oscillate about a center.

The object of the Iinvention is to provide a stroke varying device of the said lkind vwhich is simple in construction and reliable in working, and the invention consists, chiefly, in that the varying of the pump stroke is eifected by raising or lowering a supporting member for the.acti,iating member, whereby the distance between the center of oscillation of the reciprocating member and its point of contact with the driven member,v counted in the direction of movement of the said latter member, is correspondingly varied.

The invention further comprises the constructions and combinations of parts hereinafter more particularly described.

In the drawing, Figure 1 is a side elevan tion of one embodiment ot my invention. Fig. 2 is asimilar .view of a modified construction.

Referring tol Fig. yl of the drawing, a is the piston of a fuel pump j), and is the member actuating thesaid pump piston, said member being adapted -to swing about a fulcrum c on a member 0 movable toward and away from the piston a., for instance a slide movable in guides (not shown) and actuatedv by a cam or otherwise. The actuating member b is supported and guided by a member (l supported .in such a manner thatit may be raised or lowered, for instance by al lever m and a spring n, as clearly shown in the drawing. The pump pistona `has an abut` ment' surface `e which inv the embodiment shown extends at right angles tothedirectionof movement of the piston. At each stroke of the reciprocating'member its forwardly tapering end strikes the surface e Letters raient. `Paren'dara1r.4., 191 3.

Application filed January 10, 1910.V Serial No. 537,307.

and presses the piston inwardfv Then the member (l takes up the position shown in the connectthe centerof oscillation of the reciprocating member with the end f thereof d\ coincides with the direction of movement of the pump piston, in which'case the length of-stroke is the greatest possible. It, on the the member Z) is caused to swing downward ber (Z1 the projection of the said line on the direction of movement of the pump piston,

ter,is decreased.

The member may be shaped otherwise at. the end than described, and supported directly by spring fn and lever /L for instance such as shown in Fig. Q, where the end g has the form of an arc which -is eccentric the swinging movement-ot' the member the ditterent points on the surface otl thearc g will contact with the abutment surfaceA e ot' the pump piston a and on account of the ec centricity vof the arc the variation of movement of the pump piston for a given swing;- of the member bwill be greater .than in the construction shown in Fig. l, for the eccentricity of the arcis so constructed that for the same angular motion of the member b. in Fig. 1 and in Fig. 2 the end of said mear bei.' lwill recede vfarther oit from the surfacie e in Fig. Q- than the above mentioned projection of the connection line in Fig. 1 de creases.

vThen the regulating device is used in engines having two or more cylinders. a pump with its operating members Z), l', and used-with each cylinder, and the reciprocat# ing members l) corresponding to the different cylinders are all supported by a common member m1. .According to Fig. 1. this mem ber isv swingably supportedv at 71r and connected by springs 'nv to each separate supporting plane (Z. Preferably, the conne@ tion is adjustable,.for instance by nuts i', as shown lin the drawii'ig. The turning' of the member m may b effected by a common pendulum governor driven 'by the engine. In engines having two or more cylinders, in which the supply of fuel takes place at. dit'- ferent times,thelregulating members Z) are 'driven' in such a manner that they will operate the pump pistons at correspondingly different times, At ,each time one or more drawing', the line which may be supposed to' contrary,A the member al is lowered so that by gravity, always in Contact with the me1n-.

and thereby the length of stroke ot' the lat`- lin relation to the center of oscillation. 'In

ci: the members Will therefore be in contact with their corresponding pump pistons while the other menibers Z) are treej fi. fout ot Contact with their pump pistons. When a member is in contact with its pump piston, the friction between the said memners is so great that an adjustment of the member from the governor cannot take place. In order that the members retained by friction at the pump pistons shall. not .prevent the free membersv from being adjusted the springs n provide an elastic connection.' It will be easily understood that the free members b are immediately adjusted according to the position ot' the 2governor Whereas those members L which are engaged by the pump pistons are not adjusted before they leave the same.

Iiinally, it should be noted that the arrangement described enables a convenient stopping oi" internal. combustion engines having two or more cylinders. The stopping; may be eiifected by simply pressing i. the member' ym, by hand, thus causing all Lne sliding planes d to be swung down- Ward suiiiciently for causingall the members b to move out of action.

Finally, I Wish it to be understood that .the invention is not limited to use i3 connection With fuel pumps for internal combustion engines, for obviously itmay be used for controlling pumps or other devices of any kind.

I claim: f l

l. In a pump, the combination of a pis ton, a member adapted to reciprocatetoward and away from the said piston in substantially the same direction as the line of travel of the piston', an intermediate part swingably connected toA the said reciprocating member and adapted to Contact With said piston7 a movable supporting member for the said swingable part, and means for automatically adjusting the position of the said supporting member in such a manner as to cause the swingable part to perform a swinging movement about its ulcrum, by which the pump stroke is correspondingly cl i an ged.

-ivard and away 'from the said piston in substantiall)rv the same direction as the line of travel of the piston, an intermediate part sivingably connected to the said reciprocating member and adapted to contact 'with said piston7 a movable supporting member for the said snfingable part, aa governor, and

an adjustable connection between the saidgovernor and the supporting member aforesaid. n

l. In a pump, the combination of a piston7 a- .spring acting on the said piston for moving it outward7 a member adapted to reciprocate toward and away from the said piston in substantially the same direction as the line of travel of the piston, an intermediate pun'mbperating part svvingably con-- nected to vthe said reciprocating member and adapted to Contact with said piston, a movi able supportingmember for the said swingable part, and means tor automatically adjusting the position of the said support? ingl member in such a manner as to cause the swingable part to perform a swinging movement about its ulcrnm, the coperatingabutment surfaces of the actuating part and of the pump piston being so arranged relatively 'to each other that, when the actuating part strikes the pump piston, the latter acts to press the former against its supporting` member.

ERIK l-LN'IN RUNDLF.

Viitnesses liuc. filimnsnn, Kain; Ennesimo.

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