US1213092A - Rotary internal-combustion engine. - Google Patents

Description

B. F. GEBHARDT.

ROTARY INTERNAL COMBUSTION ENGINE.

APPLICATION FILED NOV-2,1915- Patented Jan. 16, 191?.

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ROTARY INTERNAL COMBUSTION ENGINE.

APPLICATION FILED NOV-2,1915

Patented Jan. 16,1917.

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ilt) lid BERNAh/D F. GrlEBlE-IARDT, tIlF FREEPOJRT, NEW YORK.

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tpectfication of Letters Patent.

Patented Jan. Ad. rear.

Application filed November a, rare. Serialho. sonar.

To all whom it may concern Be it known that it, BERNARD F. Grunrrann'r a citizen of the United States, residing at Freeport, in the county of Nassau and State of New York, have invented new and useful improvements in Rotary Internal- Uombustion Enginesy of which the following is a specification.

This invention relates to rotary internal combustion engines, the object in view being to produce an engine of the type referred to in which a unit embodyin two casings and two rotors is employe, one

casing and rotor being utilized forthe purpose of compressing the explosive mixture and the other casing and rotor being utilined for exploding the compressed charges and causing repeated impulses to be imparted to the engine shaft which is common to the rotors of both casings, the invention also relating to the connections between the compression and explosion chambers whereby the intake, compression, firing and enhaust cycles are automatically taken care of.

With the above and other objects in view, the invention consists in the novel construction, combination and arrangement of parts,

as herein described, illustrated and claimed' In the accompanying drawings:-Figure 1 is an elevation of the engine of this invention. Fig. 2 is a diametrical section through the engine showing the rotor shaft and other parts in elevation. Fig. 3 is a side elevation of the engine. Fig. 4: is a side elevation looking in the opposite direction from Fig. 3. Fig. 5 is a longitudinal section through the compression chamber showing the rotor in elevation. Fig. 6 is a similar view taken through the explosion or combustion side of the engine and showing also therotor thereof in elevation.

, The engine contemplated in thisinvention comprises twin stationary casings A and B arranged side by side and each of a generally circular formation, the casing A being centrally divided along the line a into substantially twin sections a and a", and the casing B being likewise divided on the line 6 into substantially twin sections b and b".

or The casing A comprises an annular compression chamber 1 and the casing B comprises a like annular explosion or combustion chamber 2. The casing A is provided with an intake port 3 for the explosive mixture while the casing B is provided with an exhaust port A and a hole 5 to receive an ignition device such as a spark plug.

The casing A is provided with a radially slidable eut-od or abutment 6 and the eas- 1ng B is provided with a corresponding cutoif or abutment 'i, the abutment 6 being slidable through a suitable guide 8 extending outwardly from the casing A and preferably at the top thereof as shown in the drawings, the casing B being provided with a corresponding guide 9 for its cut-0d or sliding abutment and also preferably arranged at the top and in transverse alinement with the abutment or cut-off 6.

Tn the casing A there is mounted a rotor 10 the body of which is concentric with the inner periphery of the casing, said rotor carrying on the periphery thereof a carrier 11 for a piston 12 which is substantially cylindrical in cross section as shown in Fig. A and which is grooved. to receive split packing rings 13 to prevent leakage of the minture past said piston. Tn like manner a corresponding rotor 14 is mounted within the casing 15 under the same arrangement and provided with a carrier 15 for a piston 16 similarly provided with packing rings 17. The two rotors 10 and 1A are mounted fast upon a common central so that they both revolve in unison.

The sliding abutments or cut-offs 6 and 7 are provided with rack faces 19 engaged by sector gears 20 driven by the shaft 18, each cut-off or sliding abutment being quickly closed by means of a coiled expansion spring 21 which is confined between a collar 22 fast on the sliding abutment or cut off and a stationary spring seat 23 connected to the engine frame.

241: designates a compression storage chamber which is connected to the compression chamber 1 of the casing A by means of a pipe 25 containing a back pressure check valve 26 whereby the charge compressed in the chamber 1 is forced past the valve 26 and .trapped in the chamber or reservoir 24;. Another pipe 27 leads from the reservoir 24 into the combustion chamber 2 of the casing B so as to conduct the compressed charge into the combustion chamber 2 at a point between the sliding abutment 7 and the spark plug 5. The pipe 2t is controlled by a valve 28, the stem29 of which is actu ated by a cam 30 on the engine shaft 18, the valve 28 opening inwardly to admit a charge into the combustion chamber 2 and being engine shaft 18 tlt dill

closed prior to each explosion and being held closed by the force of the explosion.

The operation of the engine is as follows: Starting with the piston 12 at the top of the casing A after having just passed the cutoff 6, said piston draws in a charge of gas through the port 3 from a suitable carburetor (not shown). This operation may be performed by hand for starting purposes by placing a detachable crank 31 on one end of the engine shaft 18. As the piston 12 again reaches the top of the casing, the cutofl 6 is slid outwardly by the means described to allow the piston to pass thereby and the cut-off then immediately closes. In the next complete circular movement of the piston 12, the charge previously drawn into the compression chamber 1 is compressed between the piston 12 and the cut-off 6 while another charge is drawn into the chamber 1 behind the piston. The compressed charge is then forced by the piston 12 through the pipe 25 and trapped by the check valve 26 in the reservoir 24. Just after the cut-off 7 in the combustion chamber has closed behind the piston 16, the valve 28 is unseated, allowing a compressed charge to enter the combustion chamber 2 between the cut-off 7 and the piston 16. As soon as said piston passes by the plug 5, a spark is produced by the latter, thereby exploding the confined charge and driving the piston 16 in the direction indicated by the arrow, the previous charge which has been ignited and expanded being expelled through the exhaust port 1. The operation just hereinabove described is repeated and the engine continues its op eration untilthe usual throttle valve (not shown) is closed for the purpose of stopping the engine.

Having thus described my invention, I claim 1. In an engine of the class specified, a

stationary casing comprising an annular compression chamber, an annular combustion chamber concentric therewith and located at one side thereof, a rotor emlmdying a piston carried on the periphery thereof and mounted in the compression chamber, a like rotor carrying a piston working in the combustion chamber, a common central shaft on which both of said rotors are fixedly mounted, a sliding cut-ell movable across the compression chamber, a like cutoff slidable across the combustion chamber in transverse alinement with the first named cut off, means connected with the engine shaft for opening and closing said cut-offs in unison, and means for transferring a charge from the compression chamber to the combustion chamber.

2. In an engine of the class specified, a. stationary casing comprising an annular compression chamber, an annular combustion chamber concentric therewith and located at one side thereof, a rotor embodying a piston carried on the periphery thereof and mounted in the compression chamber, a like-rotor carrying a piston working in the combustionchamber, a common central shaft on which both of said rotors are fixedly mounted, a sliding cut-oil movable across the compression chamber, a like cutoff slidable across the combustion chamber, rack and sector gear mechanism actuated by the engine shaft for opening and closing Said cut-oils in unison, means for transferring a charge from the compression chamber to the combustion chamber.

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

BERNARD F. GEBHARDT.

\Vitnesses t Louis F. COMELLAS,

JAMES J. NOLAN.

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