US377143A

US377143A - Rotary steam-engine

Info

Publication number: US377143A
Authority: US
Publication date: 1888-01-31
Anticipated expiration: 1905-01-31

Description

5 Sheets-Sheet 1.

(No Model.)

A. B. BULLOCK.

ROTARY STEAM ENGINE.

Patented Jan 31, 1888.

Inventor: JilansomBlhdlock by W flllorney.

(No Model.) 5 Sheets-Sl1eet 2. A. B. BULLOCK.

ROTARY STEAM ENGINE. No. 377,143. a Patented Jan. 31, 1888.

(No Model.) 7

A B BULLOCK. 5Sheets Sheet 3.

ROTARY STEAM ENGINE. No. 877,143. Patented Jan. 31, 1888.

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' ROTARY STEAM ENGINE. No. 377,143. Patented. Jan. 31, 1888.

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A. B. BULLOCK.

ROTARY STEAM ENGINE.

No; 377,143. Patented Jan. 31, 1888.

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ALANSON B. BULLOCK, OF CANTON, ll'IASSACHUSETTS.

ROTARY STEAIVFENGINE.

SPECIFICATION forming part of Letters Patent No. 377,143. dated January 31, 1888.

Application filed May 23, 1887. Serial No. 239,071. (No model.)

T0 (6 whom it may concern:

Be it known that I, ALANSON B. BULLOCK, of Canton, in the county of Xorfolk and State of Massachusetts, have invented certain new and useful Improvements in Rotary Steam- Engines, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to rotary steam engines; and it consists in certain novel features of construction, arrangement, and combination of parts, whichwill be readily understood by reference to the description of the drawings, and to the claims to be hereiuaftergiven.

Figure 1 of the drawings is an end elevation of an engine illustrating my invention, with one of its heads removed and the shaft shown in section. Fig. 2 is a plan of the same with the reversing-valve and the valve-chest cover removed. Fig. 3 is a longitudinal section on line x m on Fig. 1. Fig. i is a transverse section on line y y on Figs. 2 and 3. Fig. 5 is a similar section on line 2 z on Figs. 2 and 3. Fig. 6 is a longitudinal sectional elevation of one of the rotary piston-abutments, the cutting plane being on line '0 e on Fig. 4; and Fig. 7 is aplan of the wedge for adjusting the piston abutment rolls and the screw for operating the same.

In the drawings, A is the steamcylinder, provided with the steam-ports a, a, a, and a", leading to the inletpassages b, b, I)", and I), and with the exhaust-port 0, leading to the dischargeoritice c, in which an exhaust-pipe (not shown) is to be screwed to convey the exhaust'steam to any desired point. The interior 0f the steanrcylinder A has formed therein two dovetailed grooves extending longitudinally thereof, in which are secured in fixed positions the inwardly-projecting gear-teeth (Z (I, said teeth being arranged upon opposite sides of the axis or center of the cylinder, as shown. Said cylinder is also provided with two rectangular grooves, c c, of considerable depth, arranged equidistant from the teeth (I d and directly opposite to each other, which grooves extend longitudinally ofsaid cylinder, and have fitted therein, so as to be adjustable toward and from the center of said cylinder, the abutmentsff, the inner edges of which may have mounted therein a rolhf, as shown in Fig. 4, or be simply rounded, as shown in Fig. 5.

B is a shaft mounted in bearings formed in the heads A A of the cylinder A, so as to be revoluble therein, the head A being provided with a stuffing-box, A, through which the shaft B projects to any desired distance, and may have secured thereon a pulley for transmitting power; or a screw-propeller may be mounted on said projecting shaft in a wellknown manner.

G is the main body of the piston, firmly se cured to the shaft B and having bolted to its ends the heads 0', having diameters somewhat greater than the interior diameter of the cylinder, said heads being fittod to and revolving in an annular enlargement of said cylinder A, as shown in Fig. 3.

D, D, and D are revoluble piston-abutments mounted in bearings in the heads O,and each having firmly secured upon one end of its shaft, outside of the head 0, a toothed pinion, E, which engages with the teeth of an internal or ring gear, F, secured in a fixed position between the head A and an annular shoulder formed in the cylinder, as shown in Fig. 3.

G- is a ring secured in a fixed position between the head A and an annular shoulder formed in the cylinder A,and serves to aid in packing the piston-head.

Each of the piston-abutments D, D, and D" has formed therein a longitudinal groove, 9, extending inward to theaxis of said abutment, and having a semicircular bottom, as shown, said groove serving to receive the teeth'd d and the abutments ffinsuocession as the piston is revolved, it being understood that the diameters of the piston-abutment rolls are such that they will each make four complete revolutions to each revolution of the piston and its shaft. Each piston-abutment roll D, D, and D" has its periphery fitted to a semicircular concavity or seat formed in a bar, H, which extends from end to end of the main body ofthe piston O, and is fitted to a rectangular groove formed in said piston, so as to be adjustable radially therein by means of the wedge h, fitted in the bottom of said groove beneath said bar, the bottom of which is inclined to fit said wedge, as shown in Fig. 3. The wedge his moved eudwise by means of the screwi, having a collar,i, upon its inner end, which fits a T-shaped groove in the end of the wedge, as shown in Fig. 7. A steam-chest, I, is bolted to the valve-seat of the cylinder,and 5 is provided with the cover I and the threaded hub J, to which is to be coupled the steamsupply pipe. (Not shown.)

K is a slide-valve fitted to said valve-seat, and arranged to cover the exhaust-ports, as shown, and connected to the inner end of the valve-stem L, by which and any suitable mechanism (not shown) said valve maybe moved to the opposite end of the steam chest when it is desired to reverse the rotation of the enr 5 ginc,as would be necessary if used for driving a screw-propeller.

When the ports a and a and passages 12 and b are used for the admission of steam with the valve in the position shown in the drawings, the ports a and a? and passages?) and b are used for the discharge of the exhauststeam; but if the valve be moved to the opposite end of the steam-chest the steam will enter the cylinder through the ports a and a and passages b and b and will escape through the passages b b and ports a, a, and c, and the revolution of the piston and shaft will be reversed. v

Any desired number of cylinder-abutments f, teeth d, and rotary piston-abutments D, from one upward, may be used, though I prefer an even number of cylinder abutments f and teeth at and an odd number of the piston-abutments D, for the reason that ,by such an ar- 3 5 rangementI avoid dead-points.

It will be observed that the two passages which admit steam to the cylinder at the same time enter the cylinder uponvopposite sides of the cylinder, one above the abutment f and 0 the other below it, as shown in the drawings.

The valve K, besides being used for reversing the revolution of the piston, may be also used for stopping the revolution of the piston by moving it to a central position to cover all 5 the ports and shutoff the supply of steam to the cylinder. What I claim as new, and desire to secure by Letters Patent of the United States, is-

1. In combination with a steam -cylinder provided with both steam and exhaust ports upon opposite sides thereof, a revolving piston-body of less diameter than the bore of said cylinder, two'cylinder-abutments bridging the annular space between said piston-bodyand cylinder upon the opposite sides of the axis of said piston, two inwardly-projecting rib-like teeth set in said cylinder upon the opposite sides of the axis of revolution of the piston and equidistant from said non-revolving abutments, but not bridgingthe annular space between the piston-body and cylinder, and a plurality of revoluble piston-abutments mounted in bearings in the piston-heads and revolving therewith at the same time that they revolve about their own axes, and each provided with a longitudinal groove to engage in succession with each of said non-revolving abutments, and inwardly-projecting rib-like teeth, substantially as described.

2. In combination with a fixed steam-cylinder provided with both steam and exhaust ports upon each of two opposite sides thereof, the revoluble piston body 0, provided with the heads 0, the cyliuder-abutments ff, the teeth d d, the revoluble piston-abutments D, D, and D each provided with the groove 9 and mounted in bearings in the heads 0, the.

pinions E, the'intern'al gear F, and the shaft B, all constructed, arranged, and adapted to operate substantially as described.

3. The combination of the cylinder A, the revolving piston-body 0, provided with the heads 0, the eylinder-abutments f f, the fixed teeth (1 d, the revoluble piston-abutments D, D, and D each provided with the longitudinal groove the semicircularly grooved bar H, the wedge h, and the screw 1;.

subscribing witnesses, on this 19th day of May,

ALANSON B. BULLOCK.

Witnesses:

N. G. LOMBARD, WALTER E. LOMBARD.