US1125204A - Engine valve-gear. - Google Patents

Description

I R. G. STEVENS.

ENGINE VALVE GEAR.

APPLICATION FILED JAN. 25, 1913.

1,125,204., Patented Ja11.19,1915.

. I l F, Al j l f I' I y,/ I My l Witnesses. 2:7

aoifiitirc. srsvsns s emr; PENNSYLVANIA, AssieNoa 'r'o sK'IT'NNns. ENGINE. COMPANY, or new, PENNSYLVANIA, A CORPORATION or PENNSYLVANIA.

ENGINE VALVE-GEAR.

meat.

Specification of Letters Patent.-

- Patented Jan. 19, 1915'.

Application filed January 25, 1913. Serial No. 744,202.

To all whom it may concern:

Be it known that 1, ROBERT C. STEVENS, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Engine Valve- Gear; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, forming part of this specification.

My invention-relates to valve-gear for operating engine-valves, and has for its objectthe provision ofelectro-magnetic mechanism adapted to operate engine-valves to permit the passage of steam therethrough, to or from the piston-cylinder offan engine.

The features of my invention are hereinafter pointed out and explained and are illustrated in the accompanying, drawings in which:

Figure 1, is a vertical, transverse section of an engine cylinder through one of the inlet valves thereof, showing .my invention placed thereon. Fig. 2, is a diagrammatic view of my invention. Fig. 3, is a view of the commutator mechanism of my invention,

flattened out.

In these drawings, A, indicates an engine cylinder, B, "an enginervalve', I B, i the valve stem, b, the spring for maintaining the valve B, normally in a closed position; C, indicates the engine-shaft.

Upon the valve-stem B, I secure a yoke D, of brass or other non-magnetic metal. This yoke D, is preferably provided with a hollow cylinder 03, which fits over the valve stem-support, d, and is provided with a small air vent hole d so as to act as a dashpot to prevent noise and injur to the Valve B, by a too forcible closing 0 the valve 13, upon its seats. Upon the housing E, of the valve-stem B, I secure a support E, of brass or other non-magnetic metal and upon the upper end of this support E, I secure an electro-magnetic device F, preferably of the solenoid type having its core F, secured 'to the yoke D, on the valve-stem B. Upon face of said element'g,"being suitably interspersed with non-conducting material 9, of fiber or material of like nature. At the intermedlate portion of the surface of this commutator G, the electric conducting element 9, 1s continuous around the entire circumference of the commutatonwhile from desired points around said circumference it tapers toward the margins of the commutator as indicated by the reference letter 9 The continuous portion of the conductor element g, is indicated by the reference letter 9 Upon an arm H, secured to the engine frame, I slidably mount brush holders H, which supp'ortbrushes h, in contact with the commutator G, on the engine shaft C. I also place upon the arm H, in a permanent position thereon, a brush holder H adapted to hold a brush it, in contact with the contmuous portion 9 of the electric conductmg element g, of the commutator G. It will of course be understood, that the brushes h, h, and h, are electrically insulated in their respective brush holders. 7

I Mounted upon the engine frame I secure a governor mechanism J, which is driven by means of a suitable power transmission device J, from the shaft C, of the engine, and is adapted to operate a bell-crank lever K. This bell-crank lever K, is operatively connected to the .slidable brush holders H, by means of the links K, and. K

From the electro magnetic device F, above the-valve at each end of the cylinder, electric conductors, L, extend to the brushes h, and an electric conductor L, extends from the brush h, to one pole of an electric generator M; from the other pole of the generator M, an electric conductor N, extends to the opposite end of the coil. ineach of the electro-magl'ietic devices, connected with each of the engine valves. When the commutator G, is in the position shown in Fig. 1, of the drawings, the course of the electric current will be from the generator M, through the conductor L, to the brush it, and from thence through the element g,

.on the commutator G, to the brush it, and

thence bv one of the conductors L, to the upper end of the coil in the electromagnetic device F, and thence back by one of the conducto s N. to the generator.

It will be obvious from the fore-going descrintion, that the rotation of the engineshaft C, and the commutator G, thereon I it ' gear,

tor to one pole will cause the brushes h, to beiii contact, alternately, with the elements g, on the commutator, thereby alternately breaking the circuit communicating with each of the electro magnetic devices F, at each end of the enginecylinder, thereby causing each of said engine-valves"--1%,. to be alternately opened. It will likewise be obvieus" that as the speed of the governor mechanism J, increases, the brush holders H, will be moved longitudinally on the arm H, so 'that the brushes h, will not be in contact so long a time, with the element g, on the commutator G, thereby permitting the valve B, to close in a shorter interval after it has opened.

Having thus fully described my invention so as to enable'others to construct and use the same, what I claim as new and desire to secure by Letters-Patent is z- 1. The combination in an engine valve gear, of an engine cylinder, a valve communicating therewith, a valve-stem secured to said valve, a solenoid coil, a core thereon secured to. said valve-stem, an engine shaft, a circuit interrupter adapted to rotate in unison with said shaft, brushes in spaced relation to'each other adapted to contact with said interrupter, an electric generator, an electric conductor leading from one pole of said generator to one pole of said solenoid, an electric conductor leading from the opposite pole of said generator to one of said brushes, and another electric conductor leading from the other of said brushes to the opposite pole of said solenoid, substan tially as and for the purpose set forth.

2. The combination in an engine valveof a valve, a valve-stem, a yoke of non-magnetic material secured to said valve-stem, a spring to retain said valve in a normally closed position, a solenoid coil supported above said yoke,a solenoid core withinsaid coil and secured to said yoke,

an engine, shaft, a ,circuit interrupter adapted to rotate in unison with said shaft, brushes ins aced relation to each other contacting with said interrupter, a generator, a conductor leading from said generaof said solenoid, and another conductor leading from the opposite pole of said generator to one of said brushes, and from the other brush to the opposite pole of said solenoid, substantially as and for the purpose set forth.

3. The combination in an engine valvegear, of a valve, a valve-stem secured thereto, a yoke of non-magnetic material secured on said valve-stem, a spring adapted to retain said valve in a normally closed position, a solenoid coil above said yoke,.a solenoid core within said coil and secured on said yoke, an engine shaft, a circuit interrupter adapted to rotate in unison with said shaft, a stationary brush contacting with said interrupter, another brush laterally movable with relation to said stationary brush and contacting with said interrupter, a governor mechanism, lever mechanism adapted to be actuated by said governor mechanism to move said movable brush, a generator, a conductor leading from one pole thereof to one pole of said solenoid, and another conductor leading from 'the opposite pole of said generator to one of said brushes, and from the other of said brushes to the opposite pole of said solenoid, substantially as and for the purpose set forth.

4:. The combination in an engine valve-gear of avalve, a valve-stem secured to said valve, dash-pot mechanism adapted to be operated by said valve-stem, an electro-magnetic device adapted to raise said valve ofi of its seat, valve-stem and dash-pot mechanism in one direction, a spring to operate the same in the opposite direction, an engine-shaft, a commutator adapted to rotate in proper time with said shaft, brushes operating on said commutator, an electric generator, an electric conductor, from one pole of said generator toone pole of said electro-magnetic device, and an electric conductor leading from the opposite pole of said gznerator to one of said'brushes, and from one of the other of said brushes to the opposite pole of said electro-magnetic device, substantially as and for the purpose set forth.

5. The combination in an engine valvegear,,ofa valve, a valve-stem secured to said valve, asupport for said valve-stem, a hollow cylinder having a closed end and provided with a vent opening, secured on said valve-stem and fitting over said valve-stem support, an out-turned annular flange on said cylinder, a valve-housing inclosing said cylinder, a spring on said cylinder between said out-turned annular flange and said valve-housing adapted to maintain said valve in a normally closed position, an electro-magnetic device adapted to operate to a open said valve, an engine shaft, a commutator adapted to rotate in unison with said shaft, brushes operating on said comma tator, an electric generator, an electric conductor leading from one pole of said generator to one pole of said electromagnetic device, and an electric conductor leading fromthe opposite pole of said generator-to one of said brushes and from one of the other of said brushes to the opposite pole of said electro-magnetic device, substantially as set forth.

6. The combination in an engine valve gear of a valve, a valve-stem secured to and for the purpose said valve, dash-pot mechanism adapted to be operated by said valve-stem, an electromagnetic device adapted to raise said valve off of its seat, mechanism in one direction, a spring to op valve-stem and dash-pot erate the same in the opposite direction, a circuit connected to said electro-n'iagnetic device controlling said valve, and a circuit interrupter operated by some moving part of the engine and controlling said circuit.

T. The combination in an engine valve gear, of a valve, a valve-stem secured to said valve, a support for said valve-stem, a hollo\v cylinder having a closed end and provided with a vent opening, secured on said valve-stem and fitting over said valve-stem support. an out-turned annular. flange on said cylinder, a valve-housing inclosing said cylinder, a spring on said cylinder, between said out-turned annular flange and said valve-housing adapted to maintain said valve in a normally closed position, an electro-magnetic device adapted to operate to open said valve, a circuit connected to said electromagnetic device, controlling said valve, a circuit connected to said electro-i

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