US146925A - Improvement in devices for converting motion - Google Patents

Description

H. E.MARCHAND.

Devices for Converting Motion. `N0.1146,925.

Patented ian. 27,1974.

Uivrriin STATES PATENT @Prion HENRY MARCHAND, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN DEVICES FOR CONVERTING MOTION.

Speciicazion forming part of Letters Patent No. 146,925, dated January 27,1874; application filed January 14, 1874.

To all whom it may concern:

Be it known that I, HENRY E. MARCHAND,

of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain inner walls of the saine, and the movement of said frame is in a regular direct line, all jars or concussions Abeing entirely avoided.

In the drawings, Figure l is a perspective view of a mechanical movement constructed according to my invention, and Fig. 2 is a longitudinal vertical section thereof.

In devices heretofore known in which an eccentric is employed to convert rotary into reciprocating motion the movement of the ecy centric is transmitted by a closely-fittin g yoke toa jointed connecting-rod, the throw of which very` apt to be irregular or unsteady. In order-t `noid these defects, and to obtain from an eccentric a truc rectilinear reciprocating inotionwhich is regular and in a direct'line, whether the mechanism be arranged in a horizontal, vertical, or other position, I propose to employ mechanism of the description hereinafter explained.

The shaft A, represented in the drawing as carrying the eccentric B, is connectedwith a suitable prime motor for imparting a rotary niotion to the saine. The eccentric is constructed in two sections or halves, the contiguous faces of which are provided withA dovetail tongues and grooves a b, in order that they may be interlocked together. This construe tion of eccentric is resorted to with shafts running in boxes at their ends, so as to enable the Y eccentric to be applied in position without removing said shaft from its bearings. Suitable fastening devices, suoli as screws inserted at the `junction ofthe sections of the eccentric, may be employed for obviating any lateral movement of the same; but, as a general rule, no suoli result occurs when a slotted yoke or frame, C, is employed in connection with the eccentric, as proposed by me.4 Said yoke or frame is designed to receive a rectilinear reciprocating motion in reverse directions from the eccentric, the latter being for this purpose located or arranged within said yoke or frame in such a manner that during the rotation of the shaft A it will bear on or come in contact with the opposite ends of the frame for accomplishing the result mentioned. The frame or yoke C is composed of two slotted side bars, D, provided with a closed or solid end, E, and with a detachable block, F, at its opposite end, a powertransmitting stem or rod, G, being formed with or connected to the front end of the frame. The frame is provided with lslotted sides, so as to enable the rotary shaft to pass through the same in such a manner as not to come in contact with the ends of the frame during the movement. The sectional eccentric arranged within the frame C bears first against one end wall of the frame as it is descending, and gradually rides or glides over the saine, and then, when it rises to finish its revolution, it bears on the opposite end wall of the frame, thus imparting a perfect, smooth, uniform, and true movement to the frame and its stein or rod. The block F, which closes the rear of the frame C, is provided with a vertical opening or channel, H, and with a lower horizontal passage, I, communicating with the same, for the purpose of supplying lubricating-oil to the eccentric and the adjacent parts. An oil-cup of any approved fashion may, for this purpose, be attached to the block F, for insuring a regular supply of oil.

A mechanical movement of the nature described is regular and precise in its action, and thus it is eminently adapted for operating air and other pumps, steam-engine valves, sewing-machine mechanism, and machinery of every description which requires a reciproca-ting motion.

The eccentric frame is guided in its movement, and supported in a true horizontal, vertical, or other position, by causing the upper portion of the side bars ofthe same to rotate with the axis of the eccentric, or slide or glide over the same, and as said shaft or aXis revolves or turns, but little friction occurs, either between the shaft and the yoke or the eccentric and the yoke.

In certain instances where the mechanism described by me, or. its lsubstantial equivalent, is employed in connection with running-gear t or movable machinery, such as railroad-cars, I propose to attach the power-transmitting stem to its frame, or to a stem connected With the yoke, by a hinged connection or universal joint, so as to permit the same to conform to the motion of the cars When turning curves, or when exposed to lateral jars.

I claim as my invention@ The combination of the sectional eccentric B and its shaft embraced by the yoke C, the end Walls of the yoke being brought in bearing contact with the periphery of the eccentric for imparting a rectilinear reciprocating motion to the yoke and its stem.

In testimony that I claim the foregoing l have hereunto set my'hand this 14th day of January, 1874.

HENRY E. MARCHAND.

VVtnesses:

J AMES L. Nonms, ALBERT H. Noimrs.

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