USRE9806E - Turing oompan - Google Patents

Description

J KNOWLSON, Jr., Assignor to Lmemwoon Mmuucwmue G0. ROPE DRUM FOR WINDLASSES. No. 9,806. Reissued July 19,1881.

INVEN TOR ITNESSES ATTORNEYJ.

. tion of the drums provided with a conical the key UNITED STATES JOHN KNOWLSON, an, 0F

TROY, ASSIGNOB TO LIDGERWOOD MANUFAC- TUBING (JOMPANY,,OF NEW YORK, .N. Y.

ROPE-DRUM FOR wmoLAss'Es.

SPECIFICATION forming part of Reissued Letters Patent No. 9 ,806,-dated July 1 9, 1881.

I Original No. 150,765, dated flay 12. 1874. Application for reissue filed December 9, 1860.

To all whom it may concern Be it known that 1, JOHN KNOWLSON, Jr., of Troy, Renssela-er county, and State of New York, have invented a new andIm proved Hoisting-Drum, of which the following is a specification. y I

Heretofore hoistingdrums have been arranged loosely on'shafts driven by power, and have been connectedvwitu *the shafts by friction-connections constructed by. interposing wood between'the drums and wheels keyed fast to the shafts, the friction-connections being made and broken by the longitudinal moon the shafts. j

This invention relates to a peculiar arrangement of the wood on A shaft, audits combination with the drum, whereby the friction-connection is greatly improved both as to efllc'iency and durability.

It consists in the peculiar construction and arrangement of parts hereinafter more'fully described, andthen pointed out in the claims.

Figure 1 isalongitudinal sectional view of my improved hoisting-drum. Fig. 2 is a trans"- verse section, the shaft being intersected on the line a: a and thedrum on the lines yya'nd w w of Fig. 1. Fig. 3is a side elevation of one ofthe wheels having the wooden sections attached. p

A is a shaft, which is mounted in bearings B, and is'contmuously' revolved by the wheels 0 and D, which are operated by driving-power in any suitable way;

E is the drum for the rope F. Said drum is friction-flange, G, at each end, and arranged loosely on the shaft, so that the latter can turn without it; also, so that it can slide lengthwiseof said shaft to some extent.

H represents one of the wheels to which the wooden sections are attached, which wheel H is keyed fast to the shaft. I is a similar wheel, movable longitudinally on the shaft. The lattel. is prevented from turning on the shaft by J, which works in a slot, the shaft, and engages in slots L in the hub of the wheel. This keyis pushed forward against the wheel by the rod M in a central hole in the the rod is pushed forward by the in' the stationary nut shaft A, and screw-pm N working the wheel keyed to the 4 By the construction here a correspondinglyshaped through 0, and turned by the arms P. The endwise thrust on the shaft is sustained by the collar of the nut Q screwing on said shaft against the bearing B.

K is the friction-strap for stopping and hold ing the drum. It is worked bythe shafts and lever T. For clutching the drum to the shaft the screw-pin N is turned so as to press the wheel I against the drum, and the latteragainst the wheel H, and for releasing it the screw is reversed.

Y b b b are sections of wood which are secured to the faces of the wheels H and I, preferably by bolts,-and which together form awoodendisk on cach wheel having its periphery turned off at .an angle corresponding with the angle of the conical friction-flange G. The sections of wood are preferably made ner ends rest on the hubs of the wheels H and I, which constitute a rear support against the inward pressure ofthe flanges G, and the wheels H and I are-preferably made with flanged'metal pieces dbetween the sections of wood for still better driving power.

friction-surface is obtained, by meansofwhich the end pressure of the journals of the shaft carrying the drum is reduced to a minimum, and at the same time the advantageof the use of wood for the friction -surface is secured, 8o

whereas when a V-ahaped flange pressing into groove, such'as has heretofore been employed is used, the entire pressure-ofthe brake is exerted endwise on thejonrnals of the shaft, tion between the journalsand-the boxes, which friction is avoided by the use of my constru'ction. I. do not, however, claim to be the first to employ a conical friction-surface, as I am aware that metallicconical friction-surfaces 90 have before been used; but there are serious objections to the use of metal against metal as a friction-surface, which are overcome by my invention, which combines the advantages of both-the conical and the wood friction sur- 5 faces.

Having thus described my invention, Iclaim as new and desire ent 1. The drumhaving the conical frictionto have their inshown a conical 5 creating" much fric- I to secure -by-Letters Patflange G, in combination with the conical fricand having a rear support to sustain the intion-snrface formed of sectors of wood secured ward thrust of the conical flange against the r 5 to'a wheel on the shaft, substantially as de-' conical wood friction-surface, substantially as scribed. described. J 5 2. The combination, with the movable disk- 4. In combination with adrnmhavingaconii clutch I turning with the shaft A, of thebraekcal flange, G, a conical frietion-snrface comet-nut O, the screw having the end pin, N, the posed of sectors of wood attached to the face 20 nut Q, the key J, the shaft .A, having slot K, of the wheel, and separated by the flanges d and the pin or rod M, as and for the purpose 11, substantially as described,

10 described. JOHN KNOVVLSON, JR. 3. The combination, with the drum having Witnesses: the conical flange G, of the conical wooden v N. DAVENPORT,

friction-surface attached to the face of wheel, r H. HOLLISTER, J

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