US675521A

US675521A - Rotary engine.

Info

Publication number: US675521A
Application number: US2682200A
Authority: US
Inventors: James D Mcfarland Jr
Original assignee: Individual
Current assignee: Individual
Priority date: 1900-08-14
Filing date: 1900-08-14
Publication date: 1901-06-04
Anticipated expiration: 1918-06-04

Description

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ROTARY ENGINE.

(No Modal.) (Applicltun la'd Aug. 14, 1900.) a sheenshoot 2.

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No. 675,52I. Patented lune 4, |90I. J. D. MGFARLAND, In.

ROTARY ENGINE.

(Application led Aug. 14, 1900.)

3 Sheath-Sheet 3.

(No Model.)

UNTTED STATES PATENT OFFICE.

JAMES D. MCFARLAND, JR., OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF CNE-HALF TO JOHN'BRUCKMAN, OF SAME PLACE.

ROTARY ENGINE..

SPEGTFTCATION forming part of Letters Patent N0. 675,521, dated J' une 4, 1901.

Application filed August 14, 1900. Serial No. 26,822. (No model.)

To @ZZ whom it may concern:

Be it known that 1, JAMEs D. MCFAELAND, Jr., a citizen of the United States, residing in the city and county of San Francisco, State of California, have invented an Improvement in Rotary Engines; and I hereby declare the following to be a full, clear, and exact description of the same.

This invention relates to certain improve- 1o ments in rotary engines, the object being to construct an engine to utilize the weight that comes into its necessary parts as throw or light weight and to abolish sliding valves and also when desired to use the tluid inedium under pressure expansively.

It consists in details of construction which will be more fully explained by reference to the accompanying drawings, in which- Figure 1 is a side elevation showing one of 2o the cylinders in section. Fig. 2 is a longitudinal central section ofthe same; Fig. 3, a face view of reversing-collar E; Fig. 4, a section of reversing-collar on line so of Fig. 3; Fig. 5, an inside face of collarb, to which feed z5 and exhaust pipes g g are connected; Fig. 6, a face view of the wheel-hub, showinginlet of feed and exhaust ports to the various cylinders, the view showing how it would appear if there were four cylinders on wheels; Fig. 7, a

3o view of a inodication of my invention, showing the cylinders in the common trunk form with single end feed; Fig. 8, asectional view on line y y of Fig. 7; Fig. 9, a face View of reversingcollarused in Fig. 7; Fig. 10, an inside face of collar b, to the outside of which the feed and exhaust pipes g g are connected; Fig. 11, face of wheel-hub, showing inlet of feed and exhaust ports.

The engine consists of a circular rim A,

4o having upon one side a closed disk 2, with a projecting hub 3. The rim is sufficiently wide to receive the cylinders 4, which are secured to said rim or may be cast in the form of lugs or projections from the disk toward the center of the wheel and these lugs afterward bored out to form the cylinder, thus making the structure solid and of a single piece. The rim is broad enough so that the cylinders are inclosed between one side and 5o the other, and upon the side opposite the disk are iixed spokes G by rivets or bolts, as de-V sired.

Through the spokes or disks are formed passages or channels 7 and S, leading, respectively, to the outer and inner ends of each of the cylinders. These passages terminate in openings through the flat end of the hub, and upon this hub end is fitted a disk 9, having segmental slots or channels 10 11 12 made through it. The outer series of slots form 6o passages through which the iinpelling inedium is admitted to one set of passages and thence to one end of the cylinder, and the inner series of segments in like manner lead the impelling medium to the opposite end of the cylinder when it has arrived at the proper position to thus receive the medium. Corresponding openings in the disk or plate serve to exhaust the medium when the piston returns. 7o

Each cylinder is provided with a piston or plunger reciprocable therein, and, as shown at 14, piston-rods 15 extend through stungboxes in the inner ends of the cylinders. These piston-rods are bent at right angles, extending out to one side, as shown at 16, and thence they are bent again upon themselves, having a portion 17 parallel with the rod 15 and connecting with a slide 18, which travels in guide 19 upon the side of the cylinder, 8o thus insuring an even movement of this bent piston-rod. Connecting with the slide is a pitrnan 20, which extends to a crank-pin 21, formed by bending the shaft 22, which forms the center of revolution of the wheel. This bend being intermediate between the opposite spokes or sides of the wheel it forms a crank of sufficient length so that the pitman 20 of each cylinder may connect with the crank. A disk having the segmental admis- 9o sion and exhaust passages is fitted against the end of the hub and has suitable connections by Which the impelling medium is brought to and discharged froinit. This disk is so set that as the Wheel revolves and brings the piston of a cylinder to one end, as the outer end of a cylinder, the latter standing at an angle with the crank, the medium under pressure will be admitted to the cylinder, and acting between the piston and the outer roo cylinder-head will impel the cylinder and its head away from the piston, because the latter is connected with a fixed crank or support and cannot be moved. This movement of the cylinder outward causes a resultant diagonal or tangent action upon the wheelrim, thus moving it a certain portion of its revolution, and each cylinder arriving at the place where the impelling medium is admitted will be acted upon in the same manner, thus suddenly impelling the wheel in one direction. When the piston arrives at the opposite or inner end of the cylinder, by reason of the movement of the latter to its farthest distance from the fixed crank, the supplyopenings of the disk will then communicate through the inner passages with this end of the cylinder and an impulse will be given from that end to continue the revolution. Thus each cylinder has two impulses given at each reciprocation with relation toits piston, and a very continuous power will be applied to rotate the wheel-rim. By this construction of the U-shaped piston-rod and the slide and pitman connecting with the crank l obtain the greatest length of stroke With the smallest possible` diameter of the wheel, which is the advantage of the present construction. y

The disk with its segmental slots, which serves as a valve for admission and exhaust of the impelling medium, may be rotated upon itsaxes so as to change the position of the slots with relation to the inlet-passages of the engines, and thus the movement of the engine can be reversed and the wheel caused to rotate in the oppositek direction.

y The segmental slots through which the steam is admitted are separated from each other by a dividing-wall 13, which may make any suitable or desired distance between the slots, and the function of this wall is to permit the steam to be used expansively during the latter part of the stroke, and, the feedper-'ts in the hub passing over this closed portion,'the supply of the impelling medium Will be cut off while this occurs and the piston will continue to move to the end of the cylinder by the expansive force of the medium already contained Within it.

lf the wheel is made of sufficient diameter and it is so desired, the piston may be of the class known as trunk-piston, having a connecting-rod pivoted to theinner head and connecting with the crank, as previously described, in which case the engine would only receive and exhaust steam from the outer end and each engine would thus become singleacting.

It will be obvious that the engine-cylinders can, if desired, be placed entirely to one side of the circular diskl forming the wheel, the supply and exhaust passages being bored in this disk to connect with the cylinders, and in this case the wheel would be supported upon the main shaft, having the hub of suffcient length, While the crank would form a single bend at right angles with the shaft, the crank-pin extending across between thecylinders and having a xed support, as shown at 25.

It Will be obvious that an engine of this class may be connected directly with the shaft of a propeller or other shaft to which it is desired to apply rotary motion.

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

l. An engine consisting of a wheel having a closed disk forming one side, a series of radially-disposed cylinders cast integral'therewith and bored out, pistons movable in the cylinders, bent piston-rods each having one arm connected with a piston and an exterior. slide withywhich the other arm of said rod connects, a crank and connecting-pitmen whereby the pistons are operated, passages bored to connecty with opposite ends of the cylinders, said passages opening upon a flat end face of a hub, and a collar surrounding the Vshaft with its face abutting against the hub,

said collar having segmental slots made through it, a means for supplying a medium under pressure which is admitted alternately to opposite ends of the cylinders during the revolution of the wheel.

2. A rotary engine consisting of a disk or Wheel having cylinders radially secured or cast thereto, pistons reciprocable in the cylinders, U-shaped pistonrods, one arm of which connects with the piston Within the cylinder, and the other with a slide movable upon a fixed guide exterior to the cylinder, a crank out of line with the center of. revolution of the wheel, and a pitman connecting the piston-rod slide with said crank.

3. The combination in a rotary engine of a revoluble wheel, a shaft upon which it is mounted, and a crank out of line with said' shaft, cylinders fixed to or cast with the wheel having pistons reciprocable therein, U- shaped piston-rods, one arm of which extends through stuffing-boxes in the inner end of the cylinder and connects with the piston, slides movable upon guides parallel with the movement of the piston, with which the other ends of the piston-rods connect, pitmen connecting the slides with the tixed crank, passages made in the wheel-disk connecting the opposite ends of the cylinders with the face of the wheel-hub, a disk or collar adjustable with relation to the hub having segmental channels formed in its face coincident with the passages leading to the cylinders whereby a medium under pressure is admitted to and discharged from each end of the cylinder during the rotation of the Wheel, and dividing- Walls between the segmental channels which serve to cut oft' the medium after a part of the stroke has been completed, whereby the medium acts expansively during the remainder of the stroke.

4. In a rotary reciprocating engine, the combination of a disk or wheel, cylinders sages, and Walls or closed spaces between the admission -passages whereby the impelling medium is caused to operate expansively.

In Witness whereof I have hereunto set my hand.

JAMES D. MOFARLAND, JR. Witnesses:

HERMAN BRUCKMANN, MARGUERITE KENNY.