US942205A - Rotary steam-engine. - Google Patents

Description

J. W. JOHNSON. ROTARY STEAM ENGINE. APPLICATION 11mm mus, 1909.

Patented Dea 7, 1909.

2 SHEETS-SHEET 1.

I. w. JOHNSON-J ROTARY STEAM ENGINE. APPLICATION FILED JULY 3, 1909.

942,205. Patented Dec. 7, 1909.

2 SHEETSSHBZT 2.

i iulll JOHN W. JOHNSON, OF IB ISBEE, ARIZONA TERRITORY.

ROTARY STEAM-ENGINE.

Specification of Letters Patent.

Application filed July 3, 1909.

Patented Dec. 7, 1909.

Serial No. 505,859.

To all whom it may concern:

Be it known that 1, JOHN T. JOHNSON, a subject of the King of Sweden, residing at Bisbee, in the county of Cochise and Territory of Arizona, have invented certain new and useful Improvements in Rotary Steam Engines, of which the following is a specifi cation.

This invention relates to steam engines of the rotary type, and has particular reference to devices of this character embodying certain specific novel and advantageous fea tures of construction hereinafter fully de scribed and claimed and illustrated in the accompanying drawings, in which-- Figure 1 is an elevation of the device, partly in section and partly broken away; Fig. 2 is a vertical transverse section of the engine cylinder and the parts immediately associated therewith; Fig. 3 is a transverse sectional detail substantially on the line 3-3 of Fig. 1; Fig. at is a detail perspective view of one of the pivotal piston abutments, and Fig. 5 is a detail view of the adjusting device hereinafter described.

'lhre-ughout the following description and on the several figures of the drawings similar parts are referred to by like reference characters.

Referring to the drawings, the engine cylinder is rigidly supported in any suitable manner as by a base 11. The cylinder is substantially cylindrical and comprises a circumferential wall 12, which is circular on its inner surface for slightly more than half of its extent and having an eccentric portion 13 extending inwardly toward the axis of the cylinder. The cylinder also includes a pair of lateral disks l and 15, secured rigidly, as by bolts or screws 16, to said annular portion 12. A movable or adjustable cylinder section 17 is connected at one end by means of bolts 18 to the member 12 and having its free end cooperating with said eccentric portion 13 on the interior of the cylinder. Said free end 17 is concentric with the axis of the cylinder, while the other portions of the member 17 are eccentric. The member 12, furthermore, is rabbeted at 12 on the side or edge adjacent to the plate or disk 14.

The engine shaft 19 extends centrally through the cylinder 10 and is supported therein by a pair of stufling boxes or bearings 20 and 21. The engine piston 22 is con nected rigidly in any suitable manner to said shaft whereby the latter is driven for the purposesof the device. The piston is substantially cylindrical and is concentric with the cylinder and the outer periphery of the piston cooperates with the concentric portion 17 of the movable cylinder section 17. The piston is provided with a plurality of abutments 23, pivoted to the same near the outer periphery and adapted to lie snugly against the piston and to operate outwardly therefrom against the inner wall of the cylinder section 12 as shown in Fig. 1.

A disk or wear plate 25 is connected rigidly as by screws 25 to one face of the piston. The diameter of said disk is con siderably greater than that of the iiston, and said disk operates in the rabbet 12 of the cylinder section 12. The abutm'ents 23 are mounted on pins 26 connected to the disk 24. A plurality of plungers 27, operating in the piston, tend to throw the abutments 23 outwardly on their pivots 2G, by virtue of springs 28 located between the plungers and the piston.

Live steam is admitted into the cylinder through the pipe 29 and port 30, and the abutments having been thrown outwardly by the plungers just after passing the port 30 receive the impact of the said live steam, the abutments in such position cooperating with the inner wall of the section 12. The force of the steam is effective on each abutment until the succeeding abutment comes into operation. As soon as each abutment reaches the exhaust port 31 the steam escapes and after a slightly further movement of the piston said abutment is caused to be pressed inwardly against the tension of the spring 28 by virtue of the eccentric member 17 One purpose of the member 17 with its concentric portion 17 is to insure a proper steam tight joint or connection between the piston and the cylinder just in the rear of the admission port 30. A plunger 32, by operation of a strong spring 33, tends to maintain a proper degree of friction between the piston and said member 17 The tension of said spring may be regulated by a screw 34 connected to the cylinder.

The stuffing box 21 includes a pair of bolts 35 on which nuts 36 operate to set the gland 21 with a proper degree of tension. The bolts 35 extend outwardly to a considerable extent from the disk 15 and support in a peculiar manner the tension mechanism connected to the engine shaft 19 for the purpose of maintaining the proper degree of tension laterally between the piston and the parts of the cylinder cooperating therewith. A plate 37, through which the shaft passes freely, is provided with end holes receiving the outer ends of the bolts 35, the inner face of said plate 37 being adjustably supported against a pair of nuts 38. A coil spring 39 surrounds the shaft and has one end secured to said plate 37. The other end of the spring 39 is secured to a collar 40 between which and another collar 41 the e maybe interposed a series of antifrictional rolls to reduce the friction. The collar 41 has a screw threaded connection to the shaft 19 and normally rotates therewith. Vhen the proper degree of tension is obtained on the spring 39 by screwing the nut 40 toward the same on the shaft the collar etl may be locked in position by set screw 12 and a lock nut 43. The effect of the spring is to cause a lateral thrust of the shaft 19 and piston toward the left as indicated in Fig. 2 so as to cause the main portion of the piston to cooperate with the disk 15 and the outer margin of the plate 2% to cooperate with the rabbeted edge of the member 12. The piston is provided with a recess 22 so as to reduce the surface contact between the piston and the disk 15. When necessary to tighten the piston against the cooperating parts of the cylinder it is only necessary to adjust the nuts 38 outwardly toward the ends of the bolts 35, and since said bolts and associated parts do not rotate such adjustment may be adjusted while the engine is running.

Having thus described the invention, what is claimed as new is:

1. The herein described rotary steam engine comprising, in combination, a cylinder having a section thereof eccentrically formed and a pivotal continuation of said eccentrically formed section, one end thereof being rigidly connected to the main portion of the cylinder and the other end being free, the

extremity thereof being eccentric with the cylinder, a piston rotatably mounted within the cylinder and having a plurality of abutments pivotally secured thereto for cooperat-ion with the inner wall of the cylinder, a live steam port adjacent the free end of the said eccentric section, means to cause the abutments to cooperate with the cylinder comprising spring pressed plungers, adjustable spring means to cause the free end of the said movable cylinder section to cotipcrate with the outer periphery of the piston, and means whereby said abutments may rest flush with the periphery of said piston when the latter is in contact with the said eccentrically formed section of the cylinder, as and for the purpose set forth.

2. The herein described rotary steam engine comprising, in combination, a hollow cylinder comprising a circular member and two oppositely disposed face plates secured to said circular member, said circular memher being rabbeted on one edge next to the face plate adjacent thereto, a shaftjournaled concentrically in said cylinder, a piston secured to said shaft, said piston including a disk bearing against the rabbeted portion of said circular section, the main portion of the piston bearing against the inner wall of the opposite disk, and means to adjustably vary the degree of friction between the piston and the cylinder parts cooperating therewith, said adjusting devices including a pair of non-rotary members surrounding the shaft, a coil spring between said members, and a collar secured to the shaft and cooperating with one of said non-rotary members, substantially as set forth.

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

JOHN W. JOHNSON.

Vitnesses A. R. CAnLsoN, F. C. HURST.

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