US105951A - Improvement in mechanicati motion - Google Patents

Description

` and diluted tudes aient @Mitte Letters Patent No. 105,951, dated August 2, 1570,

IMPROVEMENT IN MECHANICA'E MOTION.

4 www- The Schedule referred to in these Letters Patent and making part of the saine.

To all whom it may concern:

Beit known that I, ANDREW KLOMAN, of Pittsburg, inthe county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement` in Mechanical Motion; and I do hereby declare' the following to be a full, clear, and exact description thereof, reference being had to the accompzltnyling drawing makinga partof this specication, in wnc1v l Figure 1 is a perspective view, partly in, section, of my improvement in devices for varying at pleasure the length of a plunger or ram, or other reciprocating mechanical device.

Figure 2 is a longitudinal vertical section thereof,

Figure 3 shows in plan view the under side of the plungeroriram, and the grooved double eccentric adjusting-block.

Like letters of reference indicate like parts in each.

In some mechanical movements, such as in bending and straightening bars of iron, upsetting the ends of iron rods and bars, it is sometimes desirable to vary the length of the ram, plunger, or other part of the machine, having a reciprocating motion, in consequence oi' the varying length or thickness of the material to be operated on, or from other causes.

My invention has this for its object, and the nature of it consists in combining with a divided plunger, or other'reciprocatin g device, a double eccentric grooved shifting block, with suitable connections, so that the shifting of the latter will lengthen or shorten the To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and mode of operation.

The frame-work b is of' any desired or convenient construction.

By a cam or eccentrie working in a yoke or box,

l a', or by other equivalent device for such uses, a reciprocating motion is imparted to the plunger c o, which plunger, in'this description, may represent any ruechanicai device which is designed to operate with a reciprocating or forward-and-back motion.

This plunger I make in two parts, the one, c, being attached to the cam-yoke a', and the other, c', being the means through which power or motion, or both, is conveyed directly or through other devices to the work to -be done. y

The adjacent ends are grooved, as at n n', the

grooves having a slight curvature corresponding to that of the grooves or flanges of the shifting block d. This block d has in one place, at a short distance from its center, and on opposite sides, two eccentric grooves, m in', so arranged with reference to each other that the points of greatest and least eccentricity shall be directly opposite each other.

The block :Z is then so connected with the plunger c c' that the flanges s s shall enter the grooves 4in an', n n of the other.

It is there held in place by a holt and nut c, the

- bolt having a square shank, c, which plays in a slot,

f, in the hearing-plate b' of the frame b, the slot vbeing of a length at least equal to the length of stroke of the ram.

The head c of the holt comes against the lower face of the plate b'.

A handle, g, or other suitable device, is attached to the block d,[for convenience in turning it, and so varyingfrthe length of' the ram c c'; and by length, in this connection, I mean the distance from its 'operative end or point to the point of its connection with the cam-yoke a' or other operative device.

The block dV turns freely on its bolt e.

It will now be observed that, by turning the block so that the grooves and flanges of the plungers c c shall occupy the flanges and grooves of' the block d at their points of least eccentricity, the adjacent ends oi' the divided ram c c' will he brought nearer together, and the length of the ram correspondingly shortened, and vice corsa. i

Hence, in order to change the relative position of the operative end of the divided ram, itis only necessary to shift the block either way, according as it may be desired to make such operative point at a greater distance from or 4nearer to the point of connection with the cam-yoke, the object, however,

being, in most cases, to change the operative endor point of the plunger or ram with reference to the material to be operatedon. or the function to he performed.

The same object can be secured by the use ofa single eccentric groove instead of two such grooves as described, the other being made with a uniform radius.

Also, the groove or grooves, instead of being made eccentric in a rotating block, as described, may be made in a sliding box, straight and converging toward either end, and, in such case, the grooves in the adjacent ends of the divided plunger c c' should be made straight and with a corresponding inclination. v

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The mode of increasing or lessening the operative length of a divided reciprocating mechanical device, by means of grooves eccentrically arranged in a rotating block vor converging in a sliding block, in combination with ahea-ded square-shanked bolt, opsueh grooves engaging correspondingly eurved or erating in a slot, f, substantially as described. inclined grooves in the adjacent', ends ot' the divided In testimony whereof, I, the said ANDREW KLO- reciprocating device, Substantially as described. MAN, have hereunto set my hand.

2. A rotating block, il, having a pair ot' grooves, ANDREW KLOMAN. one at least ot' which is eccentric, in combination Y with the divided plunger c e', substantially as de- Witnesses: scribed. WVM. B. NEEPER,

3. Vlhe subject-matter of tlielast preceding claim, R. C. WRENSHALL.

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