US43642A - Improvement in rotary engines - Google Patents

Description

rim, a.

NITED STATES PATENT OEEicE.

DAVID L. JAQUES, OF HUDSON, MICHIGAN.

IMPROVEMENT IN ROTARY ENGINES.

Specification forming part of Letters Patent N0. /l 3,642, dated July 26, 1864. I

To all whom t may' concern:

Be it known that I, D. L. JAQUES, of Hudson, in Lenawee county, in the State of Michigan, have invented certain new and useful lmprovemenfs in Rotary Steam-Engines; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference thereon marked.

Figure l is a plan view of the inner side of one of the cylinder-heads. Fig. 2 is alongitudinal vertical section through the governor, steam-chest, cylinder, &c. Fig. 3 is a view in elevation of one end of the cylinder, one of the heads being removed. Fig. 4 is a cross vertical section through the cylinder.

The engine is to be fixed vertically, as shown in the drawings, upon a suitable bed-plate.

In the several figures 'similar characters refer to like parts.

A indicates the cylinder, cast without heads, and provided with a semicircular crown, B, and is turned true, in the usual manner.

A are the two cylinder-heads, each of them being provided upon the face with an annular The heads are bolted to the cylinder in the usual manner.

I is a revolving disk secured to the main shaft Il, and is of a diameter equal to the inner diameter of cylinder A, in which it revolves. This disk is provided with annular rims K and rubberpacking 1, which revolve within and against the rims a a. It will be noticed that there is a rim, a, and a rim, K, on each side of the disk I.

P P P P are the four double pistouheads, two on each side of the disk 1, to which they ae attached, and which they lmake revolve. These piston-heads or steam-buckets are conv structed somewhat like the buckets ot' a water-wheel, and, being double, may receive the pressure of the steam either from the right or left, according to the direction of revolution. They are arranged in pairs at opposite sides of the disk, and revolve in the annular space G, included between cylintlrr-Casing A, cylinder-heads A A', crown B, and rim a, as shown in Fig. 4. The blue lines 2 represent the packing of the piston-heads to prevent the esca-pe of steam. It will be noticed thatthe inner curve ofthe piston-heads coincides with the outer curve of rim a, (around which it revolves,) while the outer curve is such as to make the piston-heads act as doubleended cams for operating the cylinder valves.

S S are the two cylinder-valves. They are curved, being an arc of somethin g greater than a semicircle, and work in a semicircular groove in the crown B, and are provided with ports S. There is a pair of these semicircular valves arranged in the crown B, so as to be parallel with, and operated by, each pair of piston heads alternately.

T is a slide-valve (operated by a screw or otherwise) in the top of thecrown B, and opens or closes the cylinder-ports t t when it is desired to reverse the engine.

C is the steam-chest, which is secured upon the crown B, and is provided with a cap, D.

F is a hollow shaft passing down through cap D and steam-chest C, and is provided at its lower end with a throttle-valve, f, which admits or cuts 4off the steam through ports t t.'

g is the spindle-valve of the governor, and plays up and down in the hollow shaft F, opening or closiu g the ports z' 17 in the said hollow shaft.

o is the steam-passage to the ports fi.

a is a small space around the spindle g and between the bottom of cap D and top of the main barrel of hollow shaft F. By this means a steam-pressure is obtained on the vsteamchest and feed-valves, so as to prevent leaking 5 also to counteract the lifting force or resistance ofthe steam when acting upon the. piston-heads.

. w is the stop-cock foll shutting the steam oft' or on.

E is a cogwheel made fast to the hollow shaft, and conveys motion to the throttle. The standards of the governor are secured upon the top side of the wheel E, andthe governor is appropriately connected to its spindle-valve g.

3 and 4t are the exhaustpipes. 5 is the condensedsteam pipe.

In the operation of my invention, when I wish to revolve the shaft to the right, I so arrange valve T as to close the right port t and open the left port t, as in Fig. 2.- Steam is is then admitted through pipe o, spindle-- valveg is raised, and throttle-valve opened. The steam then passes through said left port t and through the left ports S of thesemicirc'ular valves S into the annular chamber or cylinder G, and there strikes the piston-heads P, as shown by arrows at e. The direct and the expansive power of the steam thus let on forces that piston-head around until its portsA p are opposite the exhaust 3, where the eX- haust steam escapes. At this instant the most advanced pointsfotl the other pair of piston heads are just in contact with the lower ends ot the valves S. (See red lines, Fig. 2.) The impetus ofthe ijywvheel now forces these piston-heads P past the Valves S, driving those ends of it out from the chamber G and into its recess, and causing the other ends, y, of said valves to leave the recess and descend into chamber G, as shown in dotted lines at w, in Fig. 3. In this position the steam is cut oft. The same cam piston-heads continue to advance until they strike the ends y of the semicircular valves S, forcing those ends into their recess and the other ends out, thus again opening the left ports S. In this manner the revolutions are continued. The engine is reversed by simply changing the slide valve D so as to open the right port t, instead of the left one. v

It will be seen that the engine I have set forth is a double-engine, having a double cylinder-that is, the annular chamber G, divided into two chambers by the disk I-double pistonheads P, and double valves S.

I Wish it understood that I do not limit my claim to this duplication of devices, for my engine may be made single as Well as double by merely dispensing with one cylinder, one set of pistonheads, and one valve.

Havingthus described my invention, what I claim, and desire. to secure by Letters Patent, 1s

1. The piston-heads P I?, constructed and operating substantially as set forth.

2. The semicireular valves S S, constructed and operating substantially as specified.

3. The combination and arrangement of the steam chest C, throttle-valvef, and governorvalve g, constructed and operating substanti all y in the 1n a-nner and for the purposes Specitied.

DAVID L. JAQUES.

Witnesses: l

L. R. PEIRsoN, C. F. AVERY.

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