US584340A - ferris - Google Patents

Description

(No Model) H. L. FBRRIS.

HOIST.

No. 584,340. Patented June 15218971.

UNTTEn STATES PATENT OEETEE.

HENRY L. FERRIS, OF HARVARD, ILLINOIS, ASSIGNOR TO HUNT, HELM da FERRIS, OF SAME PLACE.

H O l S T.

SPECIFICATION forming' part 0f Letters Patent NO. 584,340, dated June 15, 1897'. Application filed April l2, 1897. Serial No. 631,750. (No model.)

To all whom it man cono/7%.-

Be it known that I, HENRY L. FERRIS, a citizen of the United States of America, residing at Harvard, in the county of McHenry and State of Illinois, have invented certain new anduse'ful Improvements in Hoists, of which the following is a specification.

My invention relates to certain improvements in lioists of the class in which means Io are provided for clamping and releasing the free end of the rope, such means being operated by said free end itself.

The purpose of the invention is to gain sim plicity, positive action, strength, and cheapness; and the invention consists in certain features of construction by means of which these ends are gained, which features are fully' described in connection with the preferred form in which I have embodied them 2o in the following specification, and the essential features or characteristics thereof are clearly pointed out in the lappended claims.

The invention is illustrated by means of five figures, of whichz5 Figure l isa side elevation of a hoist made up of two sheave-blocks and the accompanying rope. Fig. 2 is an end elevation of the upper portion of Fig. l, looking in the direction of the arrow 2, the rope being shown in i 3o cross-section at the point where it passes over the pulleys. Fig. 3 is a view similar to Fig.

l, except that the upper portion of said iigure is shown in section parallel with the plane of the paper, the line of said section being indicated in Fig. 2 by the dotted line 3 3 and the direction of the section by the arrow 3 in said ligure. Fig. 4 is a View similar to Fig.

3 of the upper portion of the latter figure,

showing certain of the parts in a different po- 4o sition; and Fig. 5 is a section in line 5 5 of Fig. 4, showing, however, only a portion of the latter figure.

Looking at these figures, the upper sheaveblock is lettered A, the lower sheave-block B,

and the rope O. The upper pulleys are lettered a, the lower pulleys The pulleys a are journaled upon an axle al, and upon this axle is also pivoted an oscillating arm D.

The pulley which carries the free end of the 5o rope is shown at the left in Fig. 2, and the upper end of the arm D is forked to embrace tion.

ing devicepivoted upon said oscillating arm said pulley, the two ends of the fork showing at CZ di, where they encircle the pulley-axle. rl`he arm D is shown as provided at its lower end with a tubular portion cl2, through which the free end of the rope runs, and it is also grooved upon the inner side opposite the pulleys, so that it loosely iits the rope and forms a guide therefor. From the side of the arm D toward the pulleys extend two brackets or lugs (Z3, in which is pivoted a clamping-cam E by means of a pin e. The face e' of the cam is preferably roughened to engage the rope, and said cam is arranged so that asit swings upward it clamps the rope and as it swings y downward it releases the same. lVhen the rope is clamped or held by said cam, the pull of the weight upon the lower sheave tightens the grip of the cam and causes the same to hold all the more securely. 7o

The inner end of the cam is provided with a series of teeth e2, and adjacent thereto upon the sheave-block is a segment F, having teeth concentric with the pulley-axle and adapted to engage those upon the cam. As the arm 7 5 D is swung toward the sheave-block the teeth upon the cam and the segment throw the former down into the position seen in Fig. 3, leaving the rope free to run in either direcl/Vhen, however, the arm D is swung 8o away from the sheave -block, the cam is swung upward into the position seen in Fig.

4, pinching the rope between it and the opposite side of the groove in the arm D. As said arm extends downward some little dis 85 tance from the pulleys it can readily be swung in either direction by means of the free end of the rope.

More or less variation in the form, arrangement, and construction above described is 9o possible, and I desire, therefore, not to limit my invention by the above description of the preferred form in which it has been embodied, but believe to be new, and desire topelaim as such invention, the following: l

l. The combination with a sheave-block, pulley and rope, of an oscillating arm pivoted to `the sheave-block and having a guidingchannel for the free end of the rope, a clamp- Ioo and adapted toclamp the rope guided therein and an operating device rigidly fixed upon the sheave-block and adapted to engage the clamping device as the arm is oscillated und operate the seme to clamp or unclamp the rope; substantially as described.

2. The combination with zt sheave-'bloclg pulley and rope, of :Ln oscillating arm pivoted to the sheave-block-and adapted to be swung by the free end of the rope, a clamping-camI pivoted to said arm and adapted to clamp the free end of the rope between it and the arm itself, said cmu being provided with teeth, and zt segment secured to the sheave block concentric with the arm-pivot adapted to engage said teeth and operate the cam as the arm is swung uponv its pivot; substantielly as described.

3. The combination with a. sheztVe-block, pu'lleyand rope, of am oscillating arm pivoted upon the pulley-axle and engaging the free end of the rope so as to be swung upon its pivot thereby, a clamping-cam pivoted upon said arm in position to clamp the free end of the rope thereto, teeth upon said cam concentric with its pivot and a segment upon the sheave-block concentric with the axle and engaging the teeth upon the cam whereby the swinging' of the free end of the rope may operate the cani to clamp the same to the oscillating arm; substantially as described. In witness whereof I have hereunto set my hand, at Harvard, McHenry county, and State of Illinois, this 7th dey of April, A. D. 1897.

HENRY L. FERRIS. Vitnesses:

J. C. BLAKE,

P. W. BLANCHARD'.

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