US1307167A - Vabiable-stboke x o operating mechanism sos estgihes - Google Patents

Description

T. H. VAN DYKE. VARXABLE ST ROKE OPERATING MECHANISM FOR ENGINES.

- APPLICATION FILED MAR.18,I919.

Patented June 17, 1919.

NVENTOR W wkz/mw fl' v mu h6g9 ATTORNEY nrir ' s res;

THOMAS H. VAN DYKE, OF KANSAS CITY,

' Specification of Letters Patent.

Application filed March 18, 1919. Serial No. 283,365.

To all whom it may concern:

Be it known that I, THOMAS H. VAN Dyna, a citizen of the United States, residing at Kansas "City, in the county ofJackson and State of Missouri, have invented a certain. new and useful Improvement in Variable-Stroke Operating Mechanism for Engines, of which the following is a specification.

My invention relates to explosive engines.

One of the objects of my invention is to provide novel means for connecting the crank shaft and connecting rod of an explosive engine by which the piston during the initial part of its outstroke and the latter part of its instroke travels at a greater -ate of. speed improvements in .than would he the case if the connectin rod were pivoted in the usual manner directly to the c ank shaft, thereby allording a maxh mum compression of the charge, and utilizing a. maximum amount of the explosive force of the charge.

My invention provides further a simple construction, which is cheap to manufacture, easily assembled, not liable to excessive wear, and which is durable and not liable to get out of order.

The novel features of my invention are hereinafter fully described and claimed.

In the accompanying drawing, which illustrates the preferred embodiment of my invention,

Figure 1 is a view partly in elevation and partly in longitudinal vertical section of a iorizontal explosive engine provided with my in'ipri'ivement.

Fig. 2 is a top view of the same.

Fig. 3 is a diagrammatic representation of the path traveled by the pin which connects the connecting rod with the member which is pivoted to the crank shaft.

Similar reference characters designate similar parts in the different views.

1 designates a rociprocative piston of an explosive engineQ of the ordinary horizontal type and 3 the crank shaft provided with the usual crank i. I

5 designates a horizontal lJZIL disposed at the side of the shaft 3 which is distant from the piston 1 and which is mounted in upwardly and rearwardly extending hearings ti on the engine base 7. 8 designates two lovers pivoted n the bar 5 and pivoted by a transverse pin Bto one end of a connecting member 10, the other end of which is pivoted by a transverse pin 11 to the outerzcud of the usual connecting rod 12, which is pivoted in the usual manner to the pistonl.

The connecting member 10 has mounted;

on it a bearing plate 13 between which and the connecting member is pivoted the crank l. The crank l is pivoted to the member 10 intermediate of the pins 9 and 11. which constitute with the crank it three pivotal points which are lined relatively to each other. 3-

reason or the construction which has been described, the piston 1 travels faster during the initialpart of its outstroke andtlie latter. part of its instroke than would be the case if the connecting rod 1) were pivoted in the usual manner directly to the crank l. 'lhiSpermits utilizing to the fullest extent the explosive, force of the chafge, and allords a maximum compression.

In the operation of the engine, when the charge is exploded the piston starts outward at high speed, thus preventing loss (it power by leakage and ra( iation or conduction away of heat. The piston 3. travels the full outstroke before the crank shaft- 3 has made a halt revolution. As shown in dotted lines in l, the piston 1 has reached the outer limit of its stroke at the time the, crank 4 has made only about one third of a revolution. During the instroke the piston travels slowly until near the latter part of the stroke at which time it travels more rapidly than it the connecting rod 12 were pivoted directly to the crank 4. Thus when compression is hi 'h the piston l traveling at a relatively nigh rate of speed, thus preventing the loss of pressure by leakage and thus greatly adding to the ell ieucy ol' the engine.

The piston travels the instroko during the time that the crank t is making" the remainin two thirds ot a revolution.

ed directly to the crank.

' travel 0 Owing to the, speed of the piston on its outward stroke, the explodingcharge does not have. tin'ie to lose much heat to the cylinder and piston and these parts do not become so highly heated as in the ordinary construction in which the comiecting rod is connectl or these reasons it is not necessary to employ a water jacket or other special cooling arrangement for the cylinder. I

in l i is a representation of the iath ot the pin ll durinea revolution oi the crank shaft, the path being denoted by the line 14. The lines a and b designate on shown in solid and dotted lines respectively in Fig. l.

I do not limit my invention to the structure shown and described, as various modifications, within the scope of the appended claims, may be made without departing from the spirit of my invention.

' What I claim is 1. In an explosive engine, the combination with a piston, connecting rod and crank shaft, of alever pivoted at a fixed point, and a connecting member-pivoted to the connecting rod and lever at two points fixed relatively to each other, and pivoted to the crank shaft.

2. In an explosive engine, the combination with a piston, connecting rod and crank shaft, of a lever pivoted at a fixed point,

and a connecting member pivoted to the connecting rod and lever at two points respectively .which'are fixed relatively to each other, an d pivoted to the crank shaft inter-' mediate of said two points.

3. In an explosive engine, the combination With a piston, connecting rod and crank shaft, of a leverv pivoted at a fixed pbint located at the side of the crank shaft distant from the piston, and a connecting member pivoted at three points, fixed relatively to each other, to the connecting rod, crank shaft and lever respectively, the pivotal connectionof said member to said crank the crank shaft. of means connecting the crank of the crank shaft and connecting red by which they are held a uniform distance apart, and by which the piston completes its outstroke before the crankshaft has made a half a revolution.

In an explosive engine, the combination with a piston, connecting rod and crank shaft, of means connecting the crank of the crankshaft and the connecting rod by which they are held a uniform distance apart and by which the piston during the initial part of its ontstroke and during the latter part of its instroke travels more rapidly than it would with-the connecting rod pivoted directly. to the crank.

6; In an explosive engine, the combination with a piston, connecting rod and crank shaft, of means connecting the crank of the crank shaft and .the connecting red by which the piston during the initial part of its outstroke and the latter part of its instroke travels more rapidly than it would with the connecting rod pivoted directly to the crank.

.In testimony whereof I have signed my name to this specification.

THOMAS H. VAN more.

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