US1144276A - Engine. - Google Patents

Description

F. J. ZELLAR.

ENGINE.

APPLICATION FILED mac. I9. 1914.

1, 1%%,276 Patented June 22, 1915.

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ENGINE.

APPLJCATION FILED DEC. 19, 1914.

Patented June 22, 1915.

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ENGINE.

APPLICATION FILED DEC. 19, 1914.

1 144 276 Patented June 22,1915.

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ENGINE.

specificatinof Letters Patent:

Patented June 22, 191 5.

Application med=Decem1ier-19,-I914. Serial No. 878,165.

type disclosed in' United States Letters Paten't Number 1,067,705, granted to me July 15, 191-3, and the general objects of the present invention are to improve the design and arrangement of the various parts so as to be more durable in construction, reliable and efiicient in use, and comparatively inexpensive to manufacture.

A more specific object of the invention is to arrange the rotary valve within the cover of the engine casing and connect the valve with a crank shaft through a crank pin, which arrangement hasth'e advantage that the valve wilelh-ave its own bearing within the cover and thus diminish the wear on the crank shaft bearing; and furthermore, by this arrangement the balance of the moving parts is more easily accomplished so that the enginewiil run smoothly and with less wear.

With such objects in view, and others which will apqbear as the description proceeds, the invention comprises various novel features of constrhction and arrangement of parts which will be set forth with particularity in the following description and claims appended hereto.

In the accompanying drawings which illustrate one embodiment of the invention and wherein similar characters of reference indicate corresponding parts in all the views, F igure 1 isa side view of the engine casing, partly in section, and with the cover taken oil and the piston -and valve removed; Fig. 2 is a side view of'the engine casing with the cover removed and showing the piston in position; Fig. 3 isa vertical sectional view on the line '33, Fig. Fig. 4 is a sectional view on the line 4+4, Fig. 5; Fig. 5-is' a horizontal section on the line 5 5, Fig. 4.;-F-ig. 6 is a verti al section on the line 66,;Fig. 4; and h1g3? is a side view of a awry valve.

Referring to the drawing A. designates the casing of-the engine, which is. composed of a rectangular body section 1, a chambered crank and bearing section 2, and-a chambored cover section 3, which sections are sultably eonnectedtogether, as, for instance, by bolts land 5. Fastened to the body section 1, which has feet or other sunporting members 6, 7 is a controlling valve casing formed with a cylindrical chamber 8 that is connected by a pipe 9 with a source of fluid under pressure. Leading from this chamber are passages 10,11 and 12, by whichsteam is admitted to and exhausted from the piston chamber of the engine,the flow of steam or other fluid being controlled by an oscillatory valve 13 which has two ports 14 and 15, whereby the steam can be supplied to either passagelO or 11, according to the direction in which the engine shaft is to be turned, and whereby steam can be exhausted from e ther of. said passages to the outlet passage 12 The valve 13 has a stem 16 having any suitable omeratin g means, such as a lever 17, movable over a sector 18 and locked with respect thereto by a latch device 19 carried by the lever. WYhen the latch device engages the mlddie "notch 20 of the sector the engine will be idle, since no steam can enter the same, butwhen the lever is in the full-line position, F 1g. 4', the engine shaft will rotate forwardly, but when the lever is thrown to the other extreme position the engine shaft will rotate in the opposite direction.

The body section 1 is provided with a rectangular chamber 21 in which is mounted a piston B which comprises a rectangular inper section -22 and an outer rectanguiar frame section 23, in which the inner section has sliding movement back and forth in a vertical plane. In other words, the inner section is as long as the internal dimensions of the outer section of the piston but is of less vertical dimension, so that the inner section will have a vertical reciprocatory motion only with respect to the outer. section. This outer section 23 reciprocates horizontally in the chamber -21 of the engine body, and of course the inner section 22 partakes of this horizontal motion. A crank pin 24 is colmected'with the center of the inner section 22 of the piston and as this crank pin is eccentric to the center of the piston chamber 21, the inner section 22 of the piston will haste a circular of translation.

The crankpin 244s setint'o a socket 25in thecrank 26 carried by the shaft 2?, which shaft is journaled ,in the bearing .28 of the casing section 2. This section 2 of the eashas a. crank chamber 29 large enough to 7 opening 32 into which the end of the crank pin 24 extends. The rotary valve C is in axial alinement with the shaft 27, and as the crank pin revolves it will cause the valve to rotate. The valve also has a central opening 0 into which engages a bearing pm a fastened in the center of the cover of the casing, as shown in Fig. 5. This valve con trols the flow of fluid to and from the piston B, and hence it is provided with separate passages p and p, which passages have arcuate ports 33 and 34, respectively, that are concentric with the valve but are spaced at difierent' radial distances, and the passages also have ports 35 and 36,.respectively, which are located in the surface opposite from that having the ports 33 and 34 and are concentric with the openings 32 that receive the crank pin. The ports 33 and 34 communicate with angular passages 33 and 34 cored out in the cover section 3 of the casing, such passages 33* and 34 being concentric and separated by an annular web 37. Also in the cover section are straight passages 38 and 39 which connect the passages 10 and 11 with the passages 33 and 34.

The inner section 22 of the piston B has arcuate ports 40, 41, 42 and 43, which are arranged in a circle concentric with the crank pin 24, and from these ports extend radial passages 40, 41, 42 and 43, respectively, and 111 the outer section 23 of the piston D are ports 41 and 43 in the ends thereof, which orts aline with the passages 41" and 43. y'this arrangement steam will be admitted to the piston chamber in such a manner that expansion will take place between the sections of the piston alternately at opposite sides of the mner section, so as to vertically reciprocate the latter and alternately between the piston as a lmit and the ends of the piston chamber so that the piston will be reci rocated horizontally, but a horizontal impu e on the iston' as a unit is followed by a vertical impulse on the inner section of the piston, and so on in succession, so that a rotary motion will be produced on the crank shaft. The direction of flow of the fluid is indicated by the arrows in the figures, that is to say, the steam will flow through the pipe 9, controlling valve port 14, passa es 10, 38 and 34, passage p of the valve passage 42 of the piston, where the steam expands to force the inner section 22 of the piston u wardly, assuming the piston to be in the position shown by the figures, and at the same time steam is passing out or exhausting through the iston passage 40, passage 12 of the valve passages 33, 39 and 11, control valve ort 15 and exhaust passage 12. As the cran shaft is rotating in a clockwise direction the rotary valve C will next admit steam to the left end of the piston chamber through the passage 41, and at the same time steam will exhaust from the opposite end of the piston chamber C through the passage 43. In this manner steam is admitted successively through one or two passa es at a time while the steam is exhausted om the opposite passage or passages, and as a consequence a continuous rotary impulse is imparted to the crank shaft by the reciprocation of the parts of the piston.

From the foregoing description taken in connection with the accompanying drawings, the advanta es of the construction and method of operation will be readily understood by those skilled in the art to which the invention appertains, and while I have described the principle of operation, together with the device w ich I now consider to be the best embodiment thereof, I desire to have it understood that the device shown is merely illustrative and that such changes may be made when desired as are within the sccipe of-the appended claims.

aving thus described my invention, .1 claim as new and desire to secure by Letters Patent:

1. An engine comprising a casing having a rectangular piston chamber, a crank chamber and a valve chamber, the piston chamber being intermediate the other two chambers and the casin including a cover that contains the valve 0 amber; a piston in the piston chamber reciprocable back and forth in one direction and having an inner section reciprocable at right-angles to the movement of the piston; a shaft having a crank pin extendin through the center of the inner section 0 the piston and beyond the latter; a rotary valve 1n the valve chamber and having an openin in which the crank pin engages for rotating the valve to control the admission and exhaust of fluid to and from the piston.

2. An en e com rising a casing having a body section provlded with a rectangular chamber, and a cover section provided with a valve chamber having concentric annular passages; a rotary'valve in the said valve chamber and having passages registering respectively with the passages of the cover section of the casing; a iston mounted in the piston chamber to bodily reciprocate in one direction and having an inner section reciprocable at right-angles to the bodily movement of the piston, and the piston having passages'to register with the assages of the valve to admit fluid to and rom the piston; a; shaft having an eccentric crank pin connected with the center of the inner section of the piston, and means in line with the crank pin connecting the inner section of the piston with the valve to rotate the same.

3. An engine comprising a casing, a shaft, a crank connected with the shaft and disposed in the casing, a piston mounted in the casing to reciprocate in one direction and having an inner section reci rocable at right-angles to the movement 0 the piston, a connection between the crank and the center of the inner section of the iston, a rotary valve mounted in the casing with its axis concentric with the shaft, and a connection between the center of the inner section of the piston and the valve at an eccentric point, said valve being located at the side of the piston opposite from the crank and con- .trolling the flow of fluid.

4. An enginecomprising a casing including a cover having a circular chamber, a shaft, a crank connected with the shaft and trio with the shaft,'a connection between the center of the inner section of the'piston and the valve at an eccentric point, said valve being located at the side of the piston opposite from the crank and controlling the flow of fluid, and the crank having a weight for counter-balancing the crank pm and inner section of the piston.

In testimony whereof I have signed my name to this specification in the presence of two subscribin witnesses.

FRED ICK JAMES ZELLAR. Witnesses:

ELBERT L. JONES, HENRY J. Vmmon'rm.

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