US357415A - Feed-motion - Google Patents

Description

(No Model.)

C. E. RING.

FEED MOTION. No. 357,415. Patented Feb. 8, 1887.

manner and by means well-known.

Y I lrrn V CHARLES E. RING, 0F SAGINAW@ MICHIGAN.

FEED-MOTION.

SPECIFICATION forming part of Letters Patent No. 357,415, dated February 8, 1887.

Application tiled August 20, 1886. Serial No. 211,458. (No model.)

To @ZZ whom it may concern:

Be it known that I, CHARLEs E. RING, of Saginaw, in the county of Saginaw and State of Michigan, have invented new and useful Improvements in Feed-Motions; and I do hereby declare that the following is a full, clear, and eXact description thereof, reference being had to the accompanying drawings, which forni a part of this specification.

This invention relates to new and useful improvements in feed-movements for reciprocating carriages, such as are used in different wood-working machines and other classes of machinery; and the invention consists in the peculiar construction and arrangement of a spring draw-back, all as hereinafter more fully described. Y

In the drawings which accompany this specification, Figure l is a perspective view of the spring draw-back detached. Fig 2 is an elevation illustrating its application in connection with a carriage for the purpose of retracting the same to its starting position after it has completed its forward motion.

A is a reciprocating carriage, which is propelled to its work by means of a pinion, B, to which power is applied, and the rack-bar C, secured to the under side of the carriage, all

so arranged that after the desired forward movement is completed the rack-bar is lifted out of engagement with the pinion, all in a For instance, in connection with the reciprocating carriage of a shingle-sawing machine, the usual way of returning such carriage to its starting-point has been by means of a weight attached to the end of4 a chain which passes over a pulley and is connected at the other end to the carriage, the weight being allowed to strike thelioor and hold the carriage until the pinion again engages with the rack and propels the carriage again forward. Such use of a weight for retracting the carriage has been found objectionable for many reasons well known-such as on account of tliejar it creates, the strain on the pinion and other parts of the machine in starting and propelling the carriage forward, also on account of slack formed in the chain which cannot hold the carriage immovablel enough when retracted. Io overcome these objections I have 'contrived the following device: To a suitable standard or post, D, in front of the carriage, Ijournal the shaft E, to which is secured the wheel F and one end of the coil-spring G, all so arranged that by turning the wheel F in the direction of the arrow the tension of the coil-spring is increased.

H is a strap provided with a hook or stirrup, I, by means of which it is adj ustably secured to the periphery of the wheel F, which, for this purpose, is provided with a series of holes, J, in its rim.

K is an elongated cani, pivotally secured to the post D and provided with a suitable clamp, L, for securing the strap H adjustably thereto.

The freey end ol' the strap H is secured to the carriage in any suitable manner.

The parts being arranged and constructedas shown and described, the proper adjustment is obtained by placing the cam K in such position on the post D that when in the position shown in Fig. 2 its lowest point will be in line with the carriage, the latter being in its retracted position-that is, nearest the post D. Then the wheel F is turned in the direction of the arrow until the required tension of the spring G is obtained, after which the strap is hooked to the rim of the wheel.

The object of the cam K is to exert the greatest strain on the spring when the carriage is nearest the post and the pinion is detached from its engagement with the carriage,thereby giving snfcient strain to hold the carriage still until the pinion will engage with the carriage and propel it. As the carriage advances the cam is oscillated by the strap and causes the tension of the spring to slacken, thereby giving the pinion less labor to do as the carriage advances to its work.

The spirit of my invention consists in retracting-the carriage by spring-power, the va riable action of which is modified by means of a cam or equivalent device to increase the action of the spring by means of increased leverage as the power of the spring decreases, and vice versa, and within this spirit the construction may be modified at will or to suit different circumstances.

Vhat I claim as my invention isl. In a feed-motion, the combination, with a reciprocating carriage, of the spring G, wheel F, strap II, attached at one end to said Wheel bearing on said strap, and adjustable clamp L and at the other to the carriage, and cam K, on said cani, all arranged to operate substanio operating on said strap, all arranged to operate tiall y as described.

substantially as described.

2. In a feed-motion, the combination, with a reciprocating carriage, of the spring G, Wheel WVitnesses:

GHAS. E. RING.

F, having the adjusting-holes J, strap H, ha-V- H. S. SPRAGUE, ing hook I, engaging one of said holes, cam K, E. SCULLY.

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