US805163A - Rotary engine. - Google Patents

Description

No. 805,163. PATENTED NOV. 21, 1905. N. B. SMITH.

ROTARY ENGINE.

APPLICATION FILED MAR. 20, 1905.

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, N-,R. SMITH. ROTARY ENGINE.

APPLICATION FILED MAILZQ, 1905.

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351 gluon W1 closing of the swing-arms carried by the rotary UNITED STATES PATENT OFFICE.

ROTARY ENGINE COMPANY, OF S TION OF WASHINGTON.

EATTLE, WASHINGTON, A CORPORA- ROTARY ENGINE.

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application filed March 20, 1905. Serial No. 251,127.

To aZZ whom it m/cty concern:

Be it known that I, NORMAN R. SMITH, a citizen of the United States of America, and a resident of the city of Seattle, in the county of King and State of \Vashington, have invented certain new and useful Improvements in Ro tary Engines, of which the following is a specification.

My invention relates to rotary engines involving certain improvements upon the construction embodied in my application Serial No. 228,046; and the primary object thereof is to provide means whereby the opening and piston will be positive.

The invention further consists in so arranging the steam parts relatively to the piston that the latter serves as an automatic cut-off therefor, and, further, the steam, being projected against the sides of the piston, serves to effect a perfect balance thereof.

The above-mentioned and other desirable objects are attained by the constructions, combinations, and arrangement of parts, as disclosed in the accompanying drawings, set forth in the following description, and pointed out in the appended claims.

In the accompanying drawings,in which like numerals of reference indicate like parts throughout the several views, Figure l is a side view of my improved engine with one head of the casing removed. Fig. 2 is a sectional view taken on line 2 2 of Fig. 1. Fig. 3 is a view in side-elevation of the engine. Fig. 4 is a fragmentary view in detail of one of the abutments, and Fig. 5 is a view in perspective of one of the swing-arms. In carrying out my invention I provide a casing 1, comprising a tubular body portion formed with diametrically opposite internal abutments 2, the side walls of which are curved, as shown, and to this body portion opposite heads 3 are secured.

Secured to rotatable shaft 4, which projects through heads 3, is the carrier or piston 5. This carrier is of less diameter than the bore of the casing, and swingingly mounted thereon and in eccentric relation'thereto are curved swing -arms 6, preferably three, which are equally spaced apart and fitted in recesses or pockets 7 in the periphery of the carrier. These swing-arms are formed with head portions 6, which are provided in their under faces with opposite transversely disposed steam grooves or channels 8, the same extending from the side edges of said head portions.

Reference numeral 9 indicates pressureplates carried by the swing-arms, the same being adapted to be acted upon by the motive fluid to drive the piston or carrier, and these pressure-plates are curved concentrically to the axis of their respective swing-arms and fit slidably in correspondingly curved pockets or slits, as 10, formed in the carrier.

Suitable opposite ports of egress are formed in the engine-casing intermediate the abutments 2, and these ports are connected with suitable pipes, as 11.

Related to swing-arm 6 are opposite ports of ingress 12, which are formed in the opposite heads of the casing at opposite sides of abutments 2 and having their inner ends arranged within the bounds of the carrier and lying in the path of grooves or channels 8.

The heads of the casing 1 are formed with cam tracks or grooves 13, which are engaged by rollers 14, mounted for rotation on the sides of bearing-plates 9, and these cam-tracks are of such form as to effect the closing of the swing-arm 6 before they reach the abutments 2 and to insure positive opening thereof as the free ends of said arms clear the abutments, and as said arms clear the abutments the steamgrooves 8 of the head portions 6 register with the elongated ingress-ports, (see Fig. 1,) thereby admitting steam beneath the head portions of the swing-arms, and the steam thus admitted acts in conjunction with cam-tracks 13 and rollers 14 to open or swing outwardly said swing-arm, thereby tending to relieve any friction between said rollers and their camtracks, as is obvious. After the swing-arms pass the ports of ingress the latter are immediately closed by the portions 5 of the carrier which overlie the same, and as the swing-arms when closed overlie the ports of ingress said ports will be closed until the grooves 8 of the succeeding swing arms register therewith The steam when out off thus exerts pressure against the sides of the carrier and serves to desired, pipes 16 can be connected to a com-.

mon feed-pipe.

In the improved engine as described 1 have provided a construction in which friction between parts is reduced to a minimum, and by arranging the swing-arms on the carrier, as described, relatively to the ports of ingress and egress no dead steam is carried between the swingarms, the steam acting on the one swing-arm being exhausted immediately after the next swing-arm is moved into action. The engine is therefore driven in a powerful manner with but a comparatively small consumption of steam.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States of America, is

1. A rotary engine comprising a casing formed in its heads with steam-ingress ports, a rotary carrier in said casing, and a swingarm mounted on said carrier and being formed at its :free portion with a head part, said head part being formed in its under face with steamchannels extending inwardly from its side edges and adapted to register with said ingress-ports.

2. A rotary engine comprising a casing, a rotary carrier therein, said casing being formed with ingress-ports arranged within the bounds of the carrier, and a swing-arm mounted on said carrier and having its under face formed with opposite channels adapted to register with said ports.

3. A rotary engine comprising a casing, a rotary carrier therein, said casing being formed with ingress-ports arranged within the bounds of the carrier, said carrier being formed in its periphery with a pocket, and a swing-armarranged in said pocket and formed with channelsadapted to receive steam from said ingress-ports.

4. A rotary engine comprising acasing having an ingress-port, a carrier rotatable therein, a swing-arm mounted on said carrier and being formed in its under face with a steamchannel, and means connected to said arm actuated from a cam-track in a casing for opening and closing said swing-arm, said swingarm starting to open when its groove registers with said ingress-port.

5. A rotary engine comprising a casing having opposite internal abutments and opposite ingress-ports on one side of each abutment, a rotary carrier formed with a pocket, a swingarm mounted in said pocket and being formed with opposite channels extending inwardly from its side, said channels simultaneously registering with said ingress-ports as the carrier is rotated.

6. A rotary engine comprising a casing, a rotary carrier mounted therein, and a swingarm mounted on said carrier and having its under face formed with asteam-channel, said casing being formed with an ingress-port arranged in the path of travel of the groove of said swing-arm, said ingress-port being normally closed by said carrier, substantially as and for the purpose specified.

7. A rotary engine comprising a casing, a rotary carrier mounted therein, said casing being provided in its opposite sides with ingress-ports arranged within the bounds of the carrier whereby the steam exerts pressure on the opposite sides of the carrier, and a swingarm mounted on said carrier and being acted upon by the steam from said ingress-ports.

8. A rotary engine comprising a casing, a rotary carrier therein, said casing being formed with ingress-ports and camtracks,and means connected to said swing-arm and being operated by said cam-tracks for opening and closing said swing-arm, said ingress-ports being arranged to discharge steam under said swing-arm when the same is being opened by said cam-track.

9. A rotary engine comprising a casing,hav ing opposite internal abutments and being formed in its sides with ingress-ports arranged at one side of said abutments, and having egress-ports intermediate said ingressports, a carrier rotatably mounted in said casing and being formed in its periphery with pockets, swing-arms mounted in said pockets and being formed with steam-channels adapted to register with said ingress-ports, bearing-plates secured to said swing-arm and extending into the carrier, and rollers on the sides of said bearing-plates, said casing being formed with cam-tracks in which said rollers are received.

Signed at Seattle, Washington, this 14th day of March, 1905.

NORMAN R. SMITH.

Witnesses:

OTIS W. BRINKER, O. B. SUPPIGER.

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