US330417A - Rotary engine - Google Patents

Description

(No Model.) 2 sheetssheet 1. E. S. PAMELA.

ROTARY ENGINE. No 330,417. Patented Nov. 17, 1885.

` (No Model.) 2 Sheets-Sheet 2.

E. S. PAMBLA.

RUTARY ENGINE. No. 330,417. Patented Nov. 171885.

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UNITED STATES PATENT EDWARD S. PAMBLA, OF CHICAGO, ILLINOIS.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 330,417, dated November 1'7, 1885.

Application filed December 20, 1884. Serial No. 150,803. (No model.)

To @ZZ whom t may concern:

Be it known that I, EDWARD S. PAMELA, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and'useful Improvements in Rotary Engines, 'of which the following is a specification, to wit:

This invention relates to an improvement in rotary engines; and it consist-s in certain novel details of the construction and arrangement oi' the same, substantially as will be hereinafter more fully set forth and claimed.

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operation, referring to the accompanying drawings, in which- Figure l is a vertical transverse section; Fig. 2, a longitudinal vertical section. Figs. 3 and 4 are end views of the regulating cutoff device, and Fig. 5 is a View of thejournal of the main shaft.

A represents the main bed or frame of the engine forming the cylinder7 through which runs the main shaft A, as represented. Upon this shaft is placed the revolving piston-head A2, which is suitably packed to prevent the escape of steam around it, as at a, and in the bottom of the main casting is formed an outlet-port, af, by which the steam escapes after performing its work.

It will be observed that the piston A2 consists of a cylindrical main portion fixed securely upon and turning with the shaft formed with a longitudinal projection, which forms the head and closes the space forming the annular steam-chamber between the cylindrical head and the outer portion of the casing, as fully seen in Fig. 1.

In the lower portion of the main casting or bed A, opposite the exhaust-port a', is an inletport, a2, to receive the live steam from the boiler, and this port passes through into the steam-cylinder. In the supply-passage a2 is placed a rock-valve, B, cut away on one side to prevent closing the outer end of thesupply and having one or more ports, b, through it to form the connection between the two portions of the passage a2, as represented. Beneath the cylinder, and forming a portion of the lower wall of the same, is a rocking steamhead, C, upon a shaft, G, the casting A being recessed, as at b', to receive the head C when it is turned down to allow the piston-head to pass. Steam being admitted to the inlet-port a2, passes into the cylinder between the rocking steam-head and the piston-head and forces the latter around. As the piston-head nears the completion of its full revolution, the steam is cut off by the movement of the valve B, and the steam-head is thrown down to allow the piston to pass it, after which it is at once thrown up again, and the valve shifted to admit the steam again. This operation is continued as'long as the engine is in operation.

To automatically operate the valve and steam-head at the proper intervals, I secure upon the end of the main shaft A a fly-wheel or belt pulley, D, upon one side of which, hinged upon the spokes, are two arms, D', provided with weights D2, adjustable in or out upon the arms by means of set-bolts d, as indicated in Fig. 3. Upon the opposite side of the Wheel D, on the pivot of each arm D, is secured a segment-gear, E, both of which engage agearwheel, E, loose upon the shaft or upon the hub of the wheel D, as may be desired. The gear E has attached to it upon its rear side a disk, e, having a cam projection, c', for cutting off steam, as will be presently explained. Attached to and turning with the shaft and fly- Wheel is a disk, G, having its outer edge formed or provided with a iiange, y, at one point of which is a cam, g', projecting inward, as fully seen in Fig. 4, which serves to operate the rock-valve to admit steam at proper times, as indicated. The valve-stem B is provided with an arm, B2, carrying a friction-roller, b2, which runs upon the inner side of the iiange g of the plate G, while the shaft C of the steam-head C has an arm, C, witha small roller, c2, running in a cam-groove, g2, in the back of the plate G, as in dotted lines in Fig. 4.

When the engine is running, the revolution of the shaft and its devices are as follows: rlhe steam-head is thrown down and up by the cam-groove, with which its crank-arm C2 connects at the proper times to allow of the passage of the piston. The valve-arm B2 is thrown inward by the cam g on the flange g, and admits steam till the cam e on the disk e IOO comes in contact with it and throws it back again to cut off steam. rlhis cam e is turned round to meet this arm sooner or latervby the action of the weighted arms D', which fly outward with greater or less force as the speed varies, thus cutting off steam at the proper point to keep the engine running at a steady speed. I also make the cam e separate from the disk e, and connect it adj ustably thereon by means of a set-screw or equivalent device, in order that it may be adjusted to cut off for expansion at any point desired, thus making a simple and economical engine, using steam t0 the best advantage, and maintaining a uniform speed. It will be observed that this engine has little or no clearance. The parts are all easily removed for repairs, and the parts are all of strong and durable form, not liable to get out of order, and capable of being operated at high speed.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a rotary engine, a rocking valve located in the supply-passage and having a stem provided with an arm carrying a friction-roller,.in combination with a disk upon the main shaft provided with a cam engaging I this arm to throw the valve in one direction to open the passage and a second cam to throw it in the other direction to close the passage, substantially as and for the purpose set forth.

2. In a rotary eng-ine, the combination, with a rock-valve in the supply-passage, having a stem and an operating arm thereon, of a cam secured upon the main shaft and contacting with this arm at a stated point in its revolution to yopen the valve, and a second cam adjustably secured upon the 'shaft to close the valve, whereby the steam is out offvfor eX- pansion at any desired point, substantially as and for the purpose set forth.

3. In a rotary engine, the combination, with a rocking valve located in the supply-passage and provided with a stem carrying a projecting arm, of a cam Xed upon and revolving with the driving-shaft to open the valve and a second cam for closing the valve loose upon said driving-shaft and connected to a weighted arm hinged upon the shaft and thrown out by centrifugal force, whereby the revolutions of the shaft alter the position of the cut-off cam to regulate the speed and keep it uniform, substantially as and for the purpose set forth.

4. In a rotary engine', the casing A, formed with the ports a a2, the shaft A', piston-head A2, the valve B, having stein B and arm B2, and the rocking steam-head C, having a stem or shaft, C', and arm C2, in combination with the fly-wheel D upon the main shaft, weighted arms D, the segments E, gear E', with its arm disk e e', and the disk G, having the camflange g g and cam-groove g?, all constructed and arranged to operate substantially as and for the purpose set forth.

In testimony whereof I affix my signature in I presence of two witnesses.

EDWARD S. PAMELA.

Witnesses:

NV. C. MOARTHUR, (l1-Iris. KREssMANN.

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