US549761A

US549761A - Windlass-crane

Info

Publication number: US549761A
Authority: US
Publication date: 1895-11-12
Anticipated expiration: 1912-11-12

Description

(No Model.) 2 Sheets-Sheet 1. v

G. W. ZASTROW;

WINDLASS CRANE. 'No. 549,761. Patented Nov. 12,1895.

. ,5- Qg N a H w WITNESSES FL.

INVENTUR ATTIJRNILY.

ANDREW HERAMAM. PHOTU-LTTHQWASNINGTUNDYC.

2 Sheets-Sheet 2.

(No Model.)

G. W. ZASTROW'.

WINDLASS CRANE.

W|TNEE15E5: 3 I I INVENTEIR 3mm a 'f" UNITED STATES PATENT OFFICE.

XV. ZASTROW, OF BALTIMORE, MARYLAND.

WINDLASS-CRAN E.

SPECIFICATION forming part of Letters Patent No. 549,761, dated November 12,. I895.

Application filed'April 2 1895'. fierial No. 544,132. (No model.)

To all whom it may concern.-

Be it known that I, GEoRenW. Znsrnow, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and irseful Improvements is a specification.

This invention relates to certain new and useful improvements in. Windlass-cranes.

The invention will first be described, and then pointed out in the appended claims.

In the accompanying drawings, Figure 1 is a front side elevation of the crane. rear end elevation. tion, the jib and its braces being in section on line 3 3.' Fig. 4 is an elevation or side view of the gearing mechanism as-seen when one side of the mast is removed. Fig. 5 is aplan view of the cross-shaft and clutchdevice. Figs. 6 and 7 are views of the brake. Fig. Sis a perspective View of the lever and its attachments for operating both the clutch and brake.

Referring to the drawings, the letter A designates the mast,comprising two upright parallel sides and having a bottom pivot 19 and a top pivot 0. Above the top of the mast is a box or frame D, from which the top pivot c is pendent or projects downward through a hole in top of mast. This pivot is hollow or tubular and serves as a bearing for a vertical shaft cl, which passes up through it. This vertical shaft has another bearing on the mast and on its upper end has a bevel-gear 6 within the box or frame and on its lower end a bevel-gear f between the two parallel sides of the mast. A counter-shaft g is mounted in suitable hangers 9 adjacent the upper box or frame D, and this shaft carries fast and loose pulleys 7; h for a belt (not shown) which communicates power to the crane. A small bevel-gear e on the end of the counter-shaft and within the box or frame D meshes with the gear e on the vertical shaft. A cross-shaft I carries a bevel-gear f between the two parallel sides of the mast, which meshes with the gear f on the lower end of the vertical shaft. This bevel-gear, while loose to turn freely on the shaft, is made fast by means of a clutch device,to be described hereinafter. On one projecting end of the crossshaft I is a pinion j. A winding-spool 7c is on a shaft which carries a gear 1, larger than the pinion j, with which it meshes. From this 1 description of the gearing it will be seen that revolving motion is transmitted to the wind- I ing-spool 7c by the revolution of the countershaft g.

in Windlass-Cranes, of which the following Q The jib: N is fast to the mast and is connected therewith by a strut formed of two parallel sides- At its outer extremity this jib carries a roller or pulley 0, and a liftingchain p is attached to-the winding-spool k and extends therefrom to the roller 0, fromwhich it hangs pendent to sustain the load q.

Fig.2 is a i Fig. 3. is a front end eleva- The cross-shaft I between the two parallel known construction, so as to revolve with the shaft, but free to move lengthwise thereof.

The large bevel-gear f has the usual clutchteeth 4", so that when the clutch-collar r is moved to make engagement with these teeth the said gear f will be fast and turn with shaft I and wind the lifting-chain on the spool k. A lever T is pivoted at s on a cross-bar fixed on the mast and carries at its forked end a pivoted half-collar t, which takes in the groove IS on the clutch-collar r. A stationary bar between the two parallel side braces m has three notches u u if, and the long end of the lever T may set in either one of them. When the lever is in the middle notch 10, the clutch is disconnected and the winding-spool k is free to turn and lower the load. When the lever is in the left-hand notch u,the clutch is engaged, the brake is released, and the winding-spool will raise the load. When the lever is in the right-hand notch 10 the clutch is disengaged and the brake is also applied, and the load may be suspended at any desired position. The near position of the free end of the operating-lever T relative to the suspended end of the chain and load (1 enables one man to take a position where he can readily swing the crane on its pivots, operate the lever,and also at the same time guide or direct the ascent or descent of the load.

On the projecting end of cross-shaft I, op-

arm 1 This sleeve is loose on a fixed shaft ac. The lower free ends of the said two segment-bars are connected with this cross-arm by links, one link 10 connecting with one end of the said cross-arm and another link w with the opposite end of said cross-arm. The segment-arms have a lining to of leather or rawhide. This lining increases the friction on the brake-wheel V. It will be seen that by tilting the sleeve X and cross-arm in one direction the segment-bars will be drawn and clamp the brake-wheel V, and in the opposite direction said bars will spread apart and leave the wheel free.

The lever T has a lateral arm T, and a rod 2 connects the said lateral arm with the leverarm g on the sleeve. Now the arrangement of these parts is such that when the long arm of lever T is in the left-hand notch u to connect the clutch for raising the load the brakebars 10 will at the same time be spread apart, and on the other hand,when the lever is moved to the right-hand notch u the effect will be to disengage the clutch and simultaneously draw the brake-bars w to apply the brake.

In lowering a load the lever may be held so as to apply the brake-bars with snificient pressure to check or control the descent of the load.

From the foregoing description the opera tion of the crane will be readily understood.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

In a crane, the combination, with a pivoted mast formed of two parallel sides spaced apart, a jib, and a strut connecting the mast and jib and also formed of two parallel. sides spaced apart, of a winding spool in the space between the two sides of the mast and carried by a shaft, 7a, which is provided with a gear wheel, 1, a winding chain extending from. the spool and pendent from the swinging end of the jib; a cross-shaft, I, journaled in the two parallel sides of the mast; a clutch on said shaft and occupying the space between said two sides; a pinion, j, also on said shaft and gearing with the said gear wheel, Z, on the spool-shaft; a brake-wheel, V, also on the cross-shaft; brake mechanism coactin g with said brake wheel; a horizontal stationary bar across between the two parallel sides of the strut and provided with three locking notches, u, u, 10 and a lever pivoted at the upper part of the mast and having a connection with the said clutch and brake mechanism, and

said lever inclining downward from its pivot toward the pendent end of the winding chain and having position between the two parallel sides of the strut and adapted to engage the said notched bar, whereby one man while standing in a given position may swing the crane, operate the clutch and brake mechanism, and also guide or direct the ascent and descent of the load.

In testimony whereof I affix my signature in. the presence of two witnesses.

GEORGE \V. ZASTROlV.

\Vitnesses:

CHARLES B. MANN, J12, C. CALVERT IIINES.