US231520A - Rotary engine or pump - Google Patents

Description

2 Sheets-Sheet 1. S. BARROW, D. BARROW 85 J. BARROW.

Rotary E'ngine or Pump.

Patented Aug. 24, 1880.

WITNESSES INVENTOR ATTORNEYS.

N. PEIERS PHOTO LTHDGRAPHER WASHINGTON D C 2 Sheets-Sheet 2. S. BARROW, D. BARROW-& J. BARROW.

Rotary Engine 0 r Pump.

Patented Aug. 24,1880.

E L 1.11.1 lIlIIIIIHl INVENTOR WITNESSES W M BY y I 46) ATTQRNEYS.

N. PETERS, Puo'io LTHOGRAPNER UNITEfi STATES PATENT OFFICE.

SAMUEL BABROW, DAVID BARROW, AND JACOB BARROW, OF INDIAN- APOLIS, INDIANA.

ROTARY ENGINE OR PUMP.

- SPECIFICATION forming part of Letters Patent No. 231,520, dated August 24, 1880.

Application filed February 11, 1880.

To all whom tt may concern:

Be it known that we, SAMUEL BARROW, DA- VID Bnnnow, and J AOOB BARROW, of Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Improvement in Rotary Engines and Pumps, of which the following is a specification.

Our invention relates to rotary engines water-motors, or pumps wherein awheel is fitted eccentrically in an elliptically-sh aped chamber or steam and water way, and fitted with two pistons, which are projected from the periph' cry of the wheel and travel in an elliptical path.

Our invention consists in certain novel details of construction of the engine, which will be particularly described hereinafter with reference to the accompanying drawings, forming part of this specification.

In the drawings, Figure l is a side elevation of the engine. Fig. 2 is a vertical section on line a." w of Fig. 1. Fig. 3 is a vertical section at right angles to the axis of the wheel on line 3 3 of Fig. 2. Fig. 4 is a side View of the wheel. Fig. 5 is a View of the wheel at the reverse side and partially in section. Figs. 6, 7, and 8 are diagrams illustrating the elliptical movement of the pistons. Figs. 9 and 10 are detail views.

Similar letters of reference indicate corresponding parts.

A is the case of the engine, formed with an elliptical interior, a, and fitted with side plates, b a, between which is the wheel B, hung eccentrioally to the interior a. The wheel B is sustained at one side by a hollow trunnion or axle, d, that extends through the plate to the spider c that is attached upon the plate 0, and at the opposite side by the shaft 6, that is connected to the wheel and extends through plate I) and through a box in the spider f. The shaft 6 is formed at its outer end with a coupling for taking power from the engine, or for driving the wheel B by a separate motor when the apparatus is used as a pump.

Upon the axle d and shaft e are packing glands or rings g, which enter stuffing-boxes formed in plates 1) 0, andscrews g, tapped in the spiders c and f, serve to press the rings 9 upon the packing and pack the axle and shaft tightly. The side plates of wheelB are grooved to receive metal packing-segments h, which are pressed outward against the plates 1) c by spiral springs i, placed in mortises behind the segments h, as shown in the detail, Fig. 9. This construction furnishes complete and durable packing.

At the upper part of interior athe case A is fitted with a metal packing-segment, k, that is pressed down on wheel B by a spiral spring, Z, as shown in Fig. 2. At opposite sides of packing 7c are ports m m, connecting with grooves 11. n in the sides of interior a, and be tween the ports at m is an exhaust-port, 0, communicating with the exhaust-pipe p.

The wheel B consists of a ring portion, 1, (shown most clearly in Figs. 4 and 5,) that is formed with radial mortises, which serve as boxes or slideways for the pistons s, and the sides of the ring 4" are covered by ring-plates t, which inclose the operating mechanism of the pistons, and are slotted, so that the pistons may project in contact with the side plates, b c, of the case. The pistons s are fixed on the outer ends of arms a, that project from a central cross-head, o, the arms being packed where they pass through the ring 1", (see Figs. 2 and 5,) and in the sides of pistons 8 there are fitted metal packings s, which are forced outward in contact with plates 1) c by spiral springs s.

The cross-head c is slotted and contains a sliding box, to, into which enters the end of the fixed tapering shaft to. This shaft w is sustained in a box, a, that is attached upon the spider c, and extends into the hollow axle 01 contiguous to the cross-head o and slide to. The shaft 20 is fitted into the box a with a screw-thread, which permits its endwise adjustment, and a set-nut is applied for clamping the shaft in place. This construction permits adjustment of shaft to to compensate for wear, the shaft w, by its taper, spreading the box w. The end of box a holds the slide 20 in place, and to allow of adjustment the holes through which the screws a pass to hold the box a are elongated, as shown in Fig. 10.

The position of the shaft w is below the cen ter of wheel b on aline drawn vertically through the said center. The shaft 10 and the axis of wheel B being fixed, the rotation of the wheel 13 causes the projection of the pistons 8, their path of rotation being an ellipse. This will be most clearly seen by reference to Figs. 6, 7, 8, wherein the horizontal dotted line D D passes through the center of wheel B and the center of slide at", and the line E through the center of shaft to or the center of the steamway.

In Fig. 6 the pistons are horizontal, projeoted at an equal distance at both sides of wheel B, and the central point between the two pistons is on the center of the wheel.

In Fig. 7 the wheel has made an eighth of a revolution, and the center point between the two pistons has moved to the right from the center of wheel A.

In Fig. 8 the wheel has made a quarter-revolution, bringing tlw pistons vertical, and the center point between them at the center of shaft to. The figure thus described at the outer end of the pistons is that of an ellipse, the major diameter of which is on a line drawn horizontally through the center of shaft 10.

At the top of case A is fitted the steam-chest and valve-chamber C, containing a slide-valve, q. The valve q is formed with a rack on its upper surface, which engages a pinion, c, that s fixed on a shaft, f, which extends through case 0, and is fitted with a handle, whereby the valve may be moved to reverse the movement of the engine. The valve q is of a size to extend over the exhaust-port 0 and either port at m, and is recessed at the under side. By these means the steam, air, or water entering the case 0 by pipe g is directed to either port at or m, according to the direction the engine is to be turned.

In operation the steam, air, or water entering by the port at or m acts with full force on the piston as soon as the piston reaches the end of groove 12 or n, which is at the same moment that the opposite piston reaches the opposite groove n or n, and the steam begins to exhaust by such groove. The engine may be used as a pump or blower, a separate motor being used in that case to drive the wheel.

Having thus described our invention, we claim as new and desire to secure by Letters Patent- I. In rotary engines and pumps, the wheel 13, fitted with pistons s, cross-head. v, sliding box to, and hollow axle d, combined with case A, having an elliptical steamway, and the fixed axis to, that enters the box 10 of the crosshead, substantially as shown and described.

2. In combination with the sliding box w, cross-head r, pistons s, and wheel B, the tapering and threaded shaft to and the box a, fixed upon the frame of the engine and extending through the hollow axle of the wheel, substantially as described and shown.

3. In combination with the rotary wheel B, having the hollow axle d, and fitted with sliding pistons s, cross-head t2, and box 10, the box a, fixed adjustably upon the frame of the engine and projecting through the axle d to the head '0, substantially as and for the purposes set forth.

SAMUEL BARROW. DAVID BARROW. JAGOB BARROW.

Witnesses:

0. It. OLSEN, H. G. NEWCOMB, Jr.

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