US1403632A - Mechanical movement - Google Patents

Description

H. A.'RECEN. MECHANICAL MOVEMENT. APPLICATION man nc.27. 1920.

1,403,632, Patented Jan. 17, 1922.

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IIVVENTOR.

UNITED STATES PATENT oerice.

HENRY A. RECEN, OF KOKOMO, COLORADO.

MECHANICAL MOVEMENT.

Application filed December 27, 1920.

vent-ion, such as will enable others skilled in the art to which it appert-a-ins to: make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a:-

part 01 this specification.

The object of this invention is to provide means for converting rotary mot-ion into res ciprocating motion, and more particularly for increasing the power at the end of the stroke. Briefly, the invention comprises a rotary curved cam adapted to engage the ends of a block reciprocable upon the axis of rotation of the cam, so that the cam forces the block from one side to the other. At an intermediate point in the cam, the same approaches the axis of rotation of the cam, so that when said point engages the end of the block, the leverage is greatest due to the proximity of said point to said axis.

In the drawings:

Figure 1 is an elevation of the cam and block with the guiding cover removed from the casing which houses the parts;

Figure 2 is a similar view showing the lock at the opposite end 01"" the stroke from Figure 1;

Figure 3 is a vertical section;

Figure 4; is an elevation of the inner face of the cover; and

Figure 5 is a plan of the reciprocating block.

The casing is provided with an external hub 12 in which is journaled a sleeve 14 provided with a driving pulley 15. A shaft 16 projects through said sleeve 14. The sleeve 14 carries on its end within the casing 10 a rotary disc 18 having a flange 20 projecting outwardly from the disc and forming a cam. This cam extends from the periphery of the disc inwardly until it passes the axis of rotation of the disc and then extends again outward to the periphery. As shown, the cam is provided in two sections on the arcs of circles of equal radii but slightly spaced centers, the connecting portion, as indicated at 2-2, being in the form of an irregular hump which assists in car- Specification of Letters Patent.

"atented J an. 17, 1922.

Serial No. 433,308.

rying up oil for proper lubrication of the parts. It will be understood that the lower portion of the casing contains oil. A reciprocable block has a longitudinally extending slot 26 which receives the end of the shaft 16, and which permits reciprocation of the block upon said end. The block is provided with a pair of oppositely-extending webs 27, from the outer edges of which o-flset arms 28 extend forward, these arms being provided at their forward edges with rollers 30, which travel in guide grooves 82 in the inner face of the cover 33 for the nous ing 10. A suitably-disposed slot 34, which is shown in vertical position, is provided in the block 25 between the offset portions 28 -for the reception of the head of any arm or rod which is to be reciprocated. This head will extend through an elongated slot 35 in the boss 36 on the outside of the cover.

Each end of the block 25 is provided with an inwardly-extending vertically-disposed slot 4E0 to receive a web 12 pivoted by means or" a pin mounted in apertures 45 in the block, which web carries a shoe 46 having an outwardly curved face adapted to engage he inner cam face 20. For the purpose of causing the shoes 46 to operate together, a link 48 is provided, this link being angular or L-shaped, as shown, and being pivoted at 50 to diagonally-opposite ends of the shoes 4.6. In order to permit operation of the shorter end of the link, the block 25 has the adjacent side thereof partially cut away, as indicated at 52 in Figure 5. By means or" this link, when one end of one of the shoes is caused to move inwardly toward the center of the block by the curvature of that portion of the cam which it engages, the end of the other shoe directly opoosite will also be moved inward. By this construction one shoe causes movement of the other in order that said other may be properly positioned when it in turn is to be engaged by the approaching end of the cam. As shown in Figures 1 and 2, one end or" the cam curves similarly to the curvature of the adjacent part of the disc 18, so that the pointof the cam readily travels in behind the adjacent shoe and slowly comes into engagement with the same. The rotation of the cam will be clockwise with reference to these views.

From the foregoin it will be seen that the outer end of the cam, as indicated at the right of Figure 1, will engage the adjacent shoe to move the block toward the left, and that when that portion of the cam shown at the extreme left in Figure 1 has been moved around into engagement with said shoe, the amount of. leverage will be much greater than when the shoe was first engaged by the end of the cam due to the fact that said point is closer to the axis of rotation of the cam. This increase in power at the end of the stroke in each direction is of especial value in certain machines, such as air compressors, where the IDtLXlHlULIH power of the stroke is required at the end thereof.

I claim:

1. In a mechanical movement a stationary member having an outstanding circular flange, a rotary member having a cam thereon in the form of an outstanding flange, and a reciprocable block engaged by said cam and circular flange for reciprocation by said cam.

i 2. In a mechanical movement, arotary member having a cam thereon in the form of an irregularly curved outstanding flange, a block reciprocable within the cam and on the axis thereof, and pivoted shoes on the ends of the block for engagement with the cam face.

3. In amechanical movement, a rotary member having a cam thereon in the form of an irregularly curved outstanding flange, a block reciprocable within the cam and on the axis thereof, pivoted shoes on the ends of the block for engagement with the cam face, and a link connecting diagonally opposite ends of the shoes.

4. A mechanical movement comprising a stationary member having a circular flange projecting outwardly from one side thereof, a bearing concentric with said flange, a rotary member pivotally mounted in said bearing, an outwardly extending arcuate flange on said rotary member, the ends of said arcuate flange rotating in close proximity to the inner surface of said circular flange, a block reciprocable between the circular flange on the stationary member and the arcuate flange, and means to guide said block as it reciprocates.

5. A mechanical movement comprising a stationary member having a circular flange projecting outwardly from one side thereof, a bearing concentric with said flange, a sleeve pivoted in said bearing, a rotary member secured to said sleeve, an outwardly extending flange of circular form secured to said rotary member and eccentric with respect to said sleeve, a shaft passing through the sleeve, a block reciprocable transversely of said shaft, means to reciprocate said block comprising the flange secured to the rotary member and means to guide said block as it reciprocate-s.

In testimony whereof I aflix my signature.

HENRY A. nnonn.

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