US1059567A - Valve-gear. - Google Patents

Description

S. ROSBNZWEIG.

' VALVE GEAR.

APPLICATION FILED DEG.18, 1911.

Pamemaed Apr. 22, 1913.

2 SEEETS-SHEET 1.

S. RUSENZW'EIG.

v VALVE GEAR. APPLICATION rum) 1120.16, 1911.

1,059,56?. Patented @1122, 1913.

i3 BEBETS-SHBBT 2.

raise;

I MEG-FRIED ROSENZWEIG, or ERIE, PENNSYLVANIA.

VALVE-GEAR.

Specification of Letters lPatent.

Patented Apr. as, rare.

Application filed December 18, 1911. Serial No. 666,520. a

To all whom it may concern:

Be it known that I, Srncrnrno Rosanzwnrc, a citizen of the German Empire, re siding at Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Valve- Gear; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, forming part of this specification.

My invention relates to reciprocatlng engines and has. for its object the construction and arrangement of the valve-gear of an enigne in such a manner that the vibration of reciprocating parts is practically eliminated.

In carrying out the objects of my invention I mount a shaft outside of the bed of the engine, on a plane with the exhaust- "tvalves, which shaft extends from a point in view of the same.

vertical line with the axis of the main shaft backward along the side of the engine bed and through the housings of the valve stems of the exhaust valves of the engine, and upon said shaft within said valve-ste1n housingsare placed valve operating cams which are so timed as to open the exhaust valves at proper time with relation to the movement of the piston. Upon this horizontal shaft I mount a centrifugal governor mechto operate both inlet valves from one rock shaft.

The features of my invention are herein after set forth and described and illustrated in the drawings as follows :-Figure 1 is a plan view of a portion of a steam engine embodying my invention. Fig. 2 is a side Fig. 3 is an end view of the engine cylinder removed from the en- I gins bed, and with the governor mechanism .tion of the arrow in Fig. 2.

removed from its shaft, looking in the direc 1 ig. a is a like view of the engine cylinder with the eccen trio and its rod removed. Fig. 5 showsa side view of an engine cylinder havinr one exhaust port, parts thereof being i W. an away. Fig. 6 is a vertical central section of the same on the line m-w in Fig.5. Fig. 7 shows an end view of the inlet valve rockshaft and valve operating cams thereon, removed from its supporting bearings, showing the relations of the cams to each other, the oscillating thereof being indicated by arrows. Fig. 8 is a like view of the exhaust valve shaft and valve operating cams thereon, showing the relation of the cams surface to each other.

-In these drawing A indicates an engine bed, and A indicates the cylinder thereon.

B indicates the bonnets or housings of the valve stems of the inlet valves, and B indicates the housings of the valve stems of the exhaust valves of the engine. The inlet valves and exhaust valve mechanisrn'are not shown in Figs. 1, 2-, 3, and 4 but are indicated in Fig. 5 and an exhaust valve is shown in Fig. 6, in longitudinal section; but no claim is made therefor herein, theS ame being reserved for a separate application. Upon the crank-shaft C of the en ine, I place a screw-gear C indicated by broken lines, and parallel with one side of the engine bed A I mount a governor shaft 1D in bearings d upon brackets d secured to the side of the engine bed, so that it will be seensaid shaft D is at right angles to the crankshaft C. Upon the end of said governor shaft D adjacent to the crank-shaft C, I secure a screw gear wheel D preferably of the same diameten as the diameter of the screw gear C, on the crank-shaft of the enthereof broken away, thereby disclosing valve operating cams D and D secured upon said shaft D. The cam I) being showgn as having moved the valve stem backwar in the act of opening the exhaust valve (not shown). on said valve stem, and the cam D being in the position thereof when its corresponding exhaust-valve not shown) is closed, the valve-stem antiriction roller f being shown as hearing against 30 the low side of the cam D. The relation of the cams D and D on the shaft D are directly opposite toeach other as shown in Fig. 8; and as indicated by the arrow in said figure, said shaft D, and valve operating cams,D and D thereon, have continuous rotation. It will be understood that these exhaust-valve operating-cams D and D are not controlled in any manner by the action of the governor mechanism E, but that they revolve in proper relation to the revolutions of the crank-shaft C of the engine and that each of said cams at each revolution thereof, opens its correspondin exhaust valve'to the greatest extent of said valve; that is, the exhaust-valves are always given their maximuih of movement.

In the construction shown in Figs. and 6, wherein is shown a single centrally located exhaust-valve F, I place upon the shaft D a single cam D having thereon wo It will be seen however, that the two cam-services (Z and d, on the cam D bear the same relation to each other as do the two as cams D and D3 shown in Figs. 1 and 8, the ole difference in operation being that the single exhaust-valve F will be opened twice with each revolution of the shaft D, while in the case of two exhaust-valves, each one 40 thereof is opened but once with each revolution of the shaft D. 1

Upon the shaft D preferably between the governor mechanism E and the valve-stem housing B next adjacent thereto, 1. place the usual valve operating eccentric G, upon which is mounted the gpvernor eccentric G which revolves in the eccentric-strap andyoke G and through the eccentric-rod G", controls the movement of the crank it of the rock-shaft H. This rock-shaft H extends through and is mounted in bearings (not shown) in the bonnets B of the housings of the valve-stems of the inlet-valves (not shown) of the engine. Upon the rock-shaft H within the bonnets B I secure valve operating cams J, and J, the cam J opening its corresponding valve at one oscillation of the rock-shaft H, and the cam J operating to open its correspondmg valve on the reverse oscillation of said shaft H.

In Fig. 1 are shown portions of each ahtifriction roller Z (see Fig. 7 mounted on the valve-stems (not shown) of the steama inlet valves of the engine, and in Fig. 6 a

oppositely disposed cam-services d 'and' noaassr likewise shown the anti-friction roller f (see Fig. 8) on the valve stem of an' exhaust valve. v

It will be observed from the foregoing and from the drawings accompanying this application, that I have eliminated from my improved valve gear all the usual reciprocating mechanism for controlling the exhaust-valves, and have reduced the weight of the reciprocating parts of the valve gear for controlling the inlet valves of the engine to the short eccentric rod, yoke and strap, extending between the shaft D and the rock-shaft H, so that there is practically little or no inertia to be overcome by the governor mechanism in controlling the opening and closing of the inlet valves'of the engine. Another advantage of the construction and arrangement of mechanism herein shown and described, is that it enables me to so locate the valve mechanism for controllin' the inlet and exhaust of steam to and em the cylinder A as to reduce the amount of clearance ordinarily incident to such valve mechanisms. This 90 feature however is not claimed in this application, but is reserved for another application.

Having thus fully shown and described my invention so as to enable others to construct and utilize the same, what I claim as new and desire to secure by Letters Patent is 1. The combination in an engine'valve gear of a valve-stem housing secured to the engine cylinder, a valve-stem sup rted by said housing, an engine crank-she t, a gearwheel secured thereon, a valve operating shaft extendingfrom said engine shaft to and supported adjacent to the end of the valve-stem, a cam thereon adapted to engage and operate said valve-stem, and a gear-whee on said shaft inter-meshing with the gear-, heel on the engine crank-shaft' whereby said valve operating shaft is con tinuously rotated so as to operite said valvestem at each revolution the *eof, substantially as set forth.

2. The combination in an engine valvegear, of valve-stem housings for the exhaust and inlet valves secured to the engine-cylinder, valve-stems supported in said housings, a crank-shaft, a shaft, geared thereto and extending through the exhaust valve-stem housing, eccentric mechanism on said shaft, cam-mechanism thereonadapted to actuate the stem of the exhaust valve, a shaft mounted in the housings 0f the inlet valves, cam-mechanism thereon adapted to actuate the stems of the inlet valves, and 125 crank and eccentric-rod mechanism extending between said eccentric mechanism and the last mentioned shaft, substantially as set-forth.

3. The combination in an engine valve- 130 oewe? gear, of valve-stem housings for the ex haust and inlet valves secured to the engine cylinder, valve-stems supported in said housings, a crank-shaft, a shaft geared thereto and extending throughthe exhaust valve-stem housing, cam-mechanism on said shaft adapted tofactuate theexhaust valvestem, eccentric mechanisms on said shaft, governor mechanism on said shaft for controiling't'he throw of said eccentric, a shaft mounted the housings of the inlet valvestems, carhnhechanism thereon adapted to actuate theinlejt valve-stems, and crank and eccentric-rod mechanism extending between eccentricf find said. last mentioned shaft, substantialiy as set forth; 4. The combination with a reciprocatin' engine f 'composedor" the usual engine be 'cranhi shaft, piston cylinder and piston, and piston rod, pitman and necessary .connections, inlet and exhaust valves and valvestem housings, secured on the piston-cylinder, of a shaft mounted parallel with the piston-rod of said engine, in hearings on the engine bed and in the housi valve-stem-of an exhaust valve 0 the engine, a valve-stem actuating-cam secured on said shaft within the housing of the valvestem. of the engine exhaust valve, an eccentric mounted on said shaft, :1 governor'w mechanism on said shaft adaptedto control the throw of said eccentric a rock-shaft mounted in the housings of the valve-stems of the inletwalves of an engine, valve-stem actuating cams secured on said rock-shaft 35 within said valve'stem housings, and crank and eccentric-rod mechanism extending between said rock-shaft and said eccentric, substantially as set forth.

In testimony whereof I v SIEGFR IED Rosenzweig Witnesses: V P; V. GIFFORD,

M. STURGEON.

of the a affix my signw ture, in presenceof'two witnesses.

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