US744342A

US744342A - Explosive-engine.

Info

Publication number: US744342A
Application number: US14098803A
Authority: US
Inventors: Bernhard G Holz
Original assignee: Individual
Current assignee: Individual
Priority date: 1903-01-29
Filing date: 1903-01-29
Publication date: 1903-11-17
Anticipated expiration: 1920-11-17

Description

PATBNTED Nov. 17,-.19o3.v

2B. GQHOLZ. EXPLOSIVE ENGINE.

APPLICATION FILED JAN. 29, 1903.

3 SHEETS-'SHEET 1.

H0 MODEL.

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- lPATHNTED Nov. 17, 190s. B. G. HOLZ. ,EXPLosIVE ENGINE.

APPLICATION FILED JAN. 29, 1903.

3 SHEETS-SHEET 2.

NO MODEL.

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No. 744,342.- PATENTE@ Nov. 1v, 1903. B. G. HOLZ. Y

EXPLOSIVE ENGINE.

l APPLICATION FILED JAN. 29, 1903. N0 MODEL.

3 SHEETS-SHEET 3. 1f 16 16 if 30 30 fyf v 2935 17 l i '1.9 I' i7 2J zo 0 2 1 e 32 Ya 2L 23 30 z5' l@ l 50 16 atented ov'ember 17, 1903.

PATENT OFFICE.

BERNHARDAG. HOLZ, OF BUFFALO, NEV YORK.

EXPLOSIVE-ENGIN'E.

SPECIFICATION forming part of Letters Patent N o. 744,342, dated November 17, 1903.

l 4Application filedV January 29, 1903. Serial No. 140,988. (No model.)

To all whom t may concern: Beit known that I, BERNHARD G, HOLZ, a citizen of the United States, and a resident of Buffalo, in the county of -Erie and State of New York, have invented certain new and useful Improvements in Engines, of which the following is aspeciication.` Y

My invention relates to engines, but more particularly to explosive-engines. VIt is,however, applicable to any other style of engine whether operated explosively, by expansion of the motive power, or by direct pressure.

The object of my invention is to provide means for causing the piston to remain momentarily in its innermost position in the cylinder as the crankY to which it is connected leaves the dead-center. This is particularly desirable in explosive-engines, for the reason that the gases, are then at their highest compression and produce greatest power, and as the ignition occurs just as the piston starts its outward stroke it causes the full force of the explosion to bev imparted to the crankshaft as the crank thereof is at its most effective point. This also prevents reversing of the engine when starting andaids materially in the free and easy running of the same. Another Objectis to construct an vengine in which the greater portion of the force of the explosion and the vibration of theengine are taken up at the point of connection of the piston-rod to thecrank-shaft. Y v l To these ends the invention consistsv Vof thev new and novel construction, arrangement, and combination of parts, as willn be hereinafter described, and particularly pointed out in the subjoined claims,v Y j My invention can be applied to steam, air, or hydraulic engines or to engines operated by any other motive power; but in order that the principles of my invention may be understood I have shown themapplied to an eX- plosive-engine, using the same asan illustration of the use of my invention without the intention of limiting its use to such an engine. This invention is susceptible to many changes in the construction, form, arrangement, and colnbination of the Various 'parts without departing from the spirit or sacriiicing any of the advantages thereof.

Referring to the drawings, Figure l is a central vertical section of an engine, showing my invention embodied therein and the piston at its innermost point with-the crank on the dead-center. Fig. 2 is asimilar view showing the crank moved beyond thefdead-center and the piston still retained at its innermost point preparatory to being forced outwardly by the force of the explosion. Fig. 3 is a vertical sectionjtakenv on linew w, Fig. 4.

Fig. 4 is an enlarged vertical section taken on line 0c 00,'Fig-jl. Fig. 5 is a View similar to Fig. 3, showing theY position of the crankcam as it leaves the dead-center. Fig. 6 is a side elevation showing the parts in the position illustrated in Fig. 5. Fig'. 7 is an enlarged plan view/of the crank connection,`

showing the piston-rod in section.

Like numerals of reference refer to like parts in the several figures.

In the engine illustrated the numeral 5 designates the cylinder, provided with a head 6 and having a Water-jacket 7, with which eX- plosive -engines are usually provided. A water-inlet and an outlet 9 are provided for the water-jacket, and'in'the head 6 the usual igniter IO is arranged. l To the lower end of the cylinder the crank-chamber llv isr bolted and has cast integrally therewith the supporting extensions `12.A A gas Yinlet and eX- haust must of course be proyided in addition to means for operating the saine; g butas these parts of the enginedo not yappear in the drawings no further reference need be made to them. These parts of the engine form no part of my invention and refer only .to one common type of explosive-engine Afor which any other type of engine may be substituted; but I will now proceed to describe my invention in detail.

. The numeral 13 designates my improved piston, which is held for reciprocation in the engine-cylinder and is connected by means of a piston-rod 14 to the crank 15 of the engineshaft. The piston-rod is formed in two sections '16 and'17, respectively, pivotally connected together by a bolt 18, disposed at right angles, mth@ .engine 01 Crank shaft'- .The lower section 17 of the piston-rod 4forms the crank-box and comprises aninner half-bearing 19l and a yielding outer half-bearing 20, movable toward and from the inner half-bearing. Bolts 2l project outwardly from the four corners of the inner half-bearing and are con- IOO nected together at theirouter end by a crossbar 22, provided with a pocket 23, which receives one end of a spiral spring 2i, interposed between said cross-bar and the outer halfbearing, which latter is guided in its movements on the four corner-bolts 2l in any suitable manner. The crank-pin has secured thereon a cam-sleeve 25, which is provided mid-length with a cam-face 2G and end portions 27, arranged concentric with the crankpin and serving as journals to support the outer terminal of the piston-rod. The outer half-bearing is held against the crank-pin journals 27 at all times by the spring 2l. The innerhalf-bearing of the crank-box comprises sides 2S, each of which is provided with a semicircular cavity, said sides being connected by a bridge portion 29, having upwardlyprojecting lugs 80, between which the lower end of the upper piston-rod section is secured. The yielding outer half -bearing comprises sides 3l, each of which is provided with a scmicircular cavity which coperate with the cavities of the upper half-bearing to receive the crank-pin of the crank-shaft. The sides of the outer half-bearing are connected together by a lower connecting-bar 32, against the under face of which the spiral spring 2l bears. The under face of the bridge portion 2) is inclined and preferably faced with a steel wearing-plate 33, which is secured thereto in any suitable manner. The said wearing-plate is inclined downwardly in the direction in which the crank-shaft revolves, and the cam is secured to the crank in such position that the working portion thereof is brought into action against the inclined brid ge portion 20 when the piston reaches the end of its inward movement, the function of the cam being to hold the piston in its innermost position while the crank moves from the deadcenter, which causes the outer half-bearing 20 of the crank-box to lower against the spring-pressure, and as the working portion of the cam leaves the inclined coacting face of the crank-box the spring forces the said outer half-bearing up to abut against the inner half-bearing. The piston reaches its innei-most point when the crank reaches its dead-center, and when in such position the gases in the combustion-chamber are under the highest compression. The cam is so positioned on the crank that it comes into action against the inclined bridge portion of the inner half-bearing just as the crank reaches the dead-center, and as it leaves the dead-center the outer half-bearing of the crank-box yields under the action of the cam and allows the crank to revolve a certain distance without causing the slightest movement of the piston, or, in other words, the piston is held in its innermost position until the working portion of the cam leaves the said inclined bridge portion, when the force of the explosion, the occurrence of which is properly timed, is imparted to the crank at the mosteffective point of its stroke.

Having thus' described my invention, what I claim is- 1. In an engine, the combination with the cylinder, of a piston held therein, a crankshaft, means for connecting said crank-shaft and piston, and means for causing said piston to be held momentarily at the innermost point of its travel as the crank of the crankshaft leaves the dead-center.

2. In an engine, the combination with the cylinder, of a piston held therein, a crankshaft, means for connecting said crank-shaft and piston, and means for causing said piston to start its outward movement when the crank of said crank-shaft is oif the deadcenter.

3. In an engine, the combination with the cylinder, of a piston held therein,va crankshaft, means for connecting said crank-shaft and piston, and means for causing the relative position of the piston and the crank of the crank-shaft to be such that the piston is at the innermost point of its travel when the said crank is at a point beyond the deadcenter.

4f. In an engine, the combination with the cylinder, of a piston 'held therein, a crankshaft, a rod connecting the piston with the crank-shaft, and means engaging the outer terminal of said rod for causing the same and the piston to be held momentarily from movement endwise as the crank of the crankshaft leaves the dead-center.7

5. In an engine, the combination with the cylinder, of a piston held therein, a crankshaft, a rod connecting the piston with the crank of said crank-shaft, and a cam secured to the crank-pin and being adapted to engage the adjacent end of the said rod to cause the piston to be held momentarily in its innermost position, as the crank of the crankshaft leaves the dead-center.

G. In an engine, the combination with the cylinder, of a piston held therein, a crankshaft, a rod connecting the piston with the crank of said crank-shaft and having an inclined contacting face, and a cam secured to the crank-pin and being adapted to coact with said inclined contacting face to cause the piston to be held momentarily in its innermost position through the agency of said rod.

7. In an engine, the combination with the cylinder, of a piston held therein, a crankshaft, a rod connecting the piston with the crank of said crank-shaft and having a crankbox comprising a fixed inner and a yielding outer half-bearing in which the crank-pin of the crank revolves, and a cam secured to said crank-pin and acting against the inner halfbearing to cause the outerhalf-bearing to be forced away from said inner half-bearin g and permit the piston to be held momentarily in its innermost position.

8. In an engine, the combination with the cylinder, of a piston held therein, a crankshaft, a rod connecting the piston with the crank of said crankshaft,and havinga crank- IOO boX in which the crank-pin of the crank revolves and Which comprises a fixed inner half-bearing provided With semicircular concavities at opposite sides and an inclined portion between said concavities and a yielding,` outer half-bearing, and a cam secured to said crank-pin and acting against said inclined portion of the inner half-bearing to cause the outer half-bearing to be forced away from the inner half-bearing and to cause the piston to be held momentarily in its innermost position.

9. In an engine, the combination with the cylinder, of a piston held therein, a crankshaft, a rod connecting the piston With the crank of said crank-shaft, a crank-box in Which said crank-pin revolves and which comprises a iXed inner half-bearing having outwardly-extendin g guid es connected by a crossbar and an outer half-bearing` movable on said guides, a spring` interposed between said cross-bar and the outer half-bearing, and a cam secured to the crankpin and acting against the inner half bearing to cause the piston to remain momentarily in its innermost position and also to cause the outer half-bearin g to move from the inner half-section. lO. In an engine, the combination with the cylinder, of a'piston movable therein, a crankshaft operatively connected With said piston, and means for momentarily holding the piston against movement at a certain point in the revolution of the crank-shaft.

v In testimony whereof I have afiixed my signature in the presence of tWo subscribing Witnesses.

BERNHARD G. HOLZ.

Vitnessesz CHAs. F. BURKHART, M. SEWERT.