US531721A - Ilton - Google Patents

Description

(No Model.)

J. J. HAMILTON. MEANS FOR CHANGING MGTION.

No. 531,721. Patented Jan. 1, 1895.

Unirse Srnrns nrnnir Orgien@ JONATHAN JOSEPH HAMILTON, OF NEEPAXVA, CANADA.

MEANS FOR CHANGING MOTION.

:PEGIFICATION forming part of Letters Patent No. 531,721, dated January 1, 1 895.

'Application led .Tune 2, 1894 Serial No. 513,269. (No model.)

W0 @Hicham it may concern.-

Be it known that I, JONATHAN JOSEPH Hair iLrON, a subject of the Queen of Great Britain, residing at Neepawa, in the county of Beautiful Plains and Province of Manitoba, Canada, have invented certain new and useful Improvements in Means for Changing Motion; 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.

My invention relates to improvementsin mechanical movements, and particularly to converting reciprocating motion into rotary motion, or rotary motion into reciprocating motion.

Primarily the object of my invention is to provide a simple and eiective device for reducing the consumption ot' power to a minimum.

A further object is to apply power direct to the drive-shaft, thereby making the parts very compact by entirely dispensing with the connecting rod between the crosshead and the crank.

The invention consists essentially in providing a reciprocating grooved or cam-actuating cross-head or block which engages two projections arranged on the crank-wheel of the drive-shaft by which the said shaft re ceives a rotary motion; or if the power be rotary by means of which the said cross-head or grooved block is reciprocated.

My invention further consists in the novel construction and combination of the several parts as will be more fully hereinafter set forth and then defined in the claims at the end of the description.

Referring to the accompanying drawings, in which like letters of reference refer to similar parts, Figure l is a side elevation of the invention as applied to a steam engine. Fig. 2 is a vertical transverse section taken on the line II--II of Fig. l, illustrating several of the parts in dotted lines. Fig. 3 is a diagrammatic view illustrating the travel ofthe crank pin or stud, also the line of travel of the crosshead; and Fig. e is a fragmentary View of a slightly modified form of adjusting block.

In the drawings A designates an engine bed or frame provided with the usual cross-head guides B, which are in alignment with the cylinder C of the engine, only sufiicient of said engine being shown to properly illustrate the working of the invention. Passing through the stntng box c of the cylinder is thepiston rod or power arm D which has a reciprocating movement imparted thereto in any suitable manner. On the outer end of this rod is a cross-head or block E arranged between the guides B, which serve as a bearing therefor. The cross-head E is provided with the short slots or grooves e and e arranged in the upper and lower portion, respectively, of said cross-head and extending in avertical plane thereof. Arranged in the same plane as the slots is preferably located a block e2, of rectangular formation, rigidly secured to or formed integrally with the crosshead. This block is centrally located on the cross-head or block E and extends partly through the same and serves to form two channels or grooves e3 and e4, between the edges of the block and the inner portion of the cross-head for the purpose as will hereinafter appear. The edges of the block may be slightly curved, as shown at e5 in Fig. 4, if so desired.

F is a crank or drive wheel secured to the drive shaft f in any suitable manner; the said Wheel having arranged in a radial line from the center thereof two studs or pins f and f2, preferably provided on their outer ends with anti-friction rollers. The stud f" is shorter than the stud f 2 allowing the former to pass in front of the block, while the latter is of sufficient length to engage the edge of the block and inner portion of the cross-head, as will presently appear.'

The position of the cross-Ahead as shown in Fig. l, is at its outward throw having carried the studf from the point H, Fig. 3, to the point H', the travel of the cross-head being on a line connecting these two points. At the point H', the stud f leaves the slot @,Fig. 1, due to the momentum of the wheel F or of a separate fly wheel Gr secured to the shaft; the said wheel being indicated by dotted lines in said iigure. The stud f2 at this time enters the channel or groove c4 serving to prevent any further movement of the cross-head and retaining same in a fixed position during its passage through said groove. Thisserves ICO to gradually stop any further movement of the piston rod and finally to rigidly hold same during a short period. The momentum of the wheel carries the stud f over the dead center to the point H2, at which time the said stud enters the slot e of the cross-head; the the stud f2 having passed through the groove e4. At this time the cross-head begins to return carrying with the stud f from the point H2 to the point H3, the momentum of the wheel again carrying the crank wheel and shaft overthe other dead center to the point I-I. The stud f2 during this movement passes through the channel or groove e3 of the crosshead. The parts are again in position for another revolution which may be continued thereby imparting a continuous rotary motion to the drive-shaft f. By this arrangement a much shorter movement may be given to the crosshead and consequently, where a steam engine is used, a shorter cylinder may be used requiring less consumption of steam, and furthermore, no expenditure of power is required for carrying the drive-shaft over the dead centers as this is accomplished by the momentum of the drive-wheel or fly-wheel.

Should two engines be used, as in oase of locomotives, the parts will be so arranged that one engine will operate to positively rotate one crank-wheel as the other wheel of the shaft is passing the dead center. l

It is obvious that I might support the block or cross-head E and the power-arm D in any suitable manner and that the cross-head may be reciprocated by other means than by a steam engine. I may make the block c2 and the cross-head adjustable to permit of varying the length of stroke of said cross-head. Instead of grooves for the passage of the studs, a cam surface may be provided on the crosshead for actuating the crank. Other modifications may be made without departing from the spirit of my invention.

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

l. The combination with the cross-head and means for reciprocating said crosshead, of a crank having two projections arranged to project outwardly from the same side of said crank, one of the said projections adapted to engage grooves to limit the movement of the cross-head and the other projection adapted to engage slots in said cross-head, substantially as described.

2. The combination with the cylinder, power rod, and reciprocating cross-head arranged on the power arm, of a crank having two projections arranged in the same radial line and projecting outwardly from the same side of said crank, one ofthe said projections adapted to engage grooves to limit the movement of the cross-head and the other adapted to en gage slots in the cross-head, substantially as described.

3. The combination with the crank having two studs arranged thereon, of a reciprocating cross-head provided with a slot inthe upper and another in the lower portion thereof in which one of the studs is adapted to work, a block arranged in the central portion ofthe cross -head forming a groove on each side thereof for the passage of the other stud and -means for movingthe cross-head, substantially as described.

4. The combination with the cylinder and power-arm, of a cross-head arranged thereon, the said cross-head having a slot inthe upper and another in the `lower portion thereof, a block centrally located on the cross head forming a groove in the opposite sides, a crank wheel having two studs or pins arranged in the same radial line, one of said studs engaging the slots of said cross-head, while the other stud engages the grooves formed by the block, substantial] y as described.

In testimony whereof I affix my signatu re in presence of two witnesses.

.I0-NATHAN JOSEPH HAMILTON.

Witnesses:

ALEX. H. HUNTER, W. M. HAMILTON.

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