US263126A - bobbie - Google Patents

Description

2 She'etsf-Sheet 1.

(No ModelJ' A. DGBBIE.

HOISTING MACHINE. Y

y Patented Aug. 22, 1882.

N. PErEns, mvmnwgnpner, wan-ingu. u. c.

(No Model.) 2 Sheets-Sheet`2 A. DGBBIE.

. HoIsTING MACHINE. No. 263.1216. Patented Aug.f22, 1882.

NrrEn STATES!N PATENT Erica.

HolsTlNG- MACHINE.

SPECIFICATION forming part of Letters .Patent No. 263,126, dated August 22, 1882.

Application filed June 6, 1882. (No model.)

To all whom it may concern Be it known that I, ARCHIBALD DoBBIE, of Thorold, in the county ofl Welland and Province ot' Ontario, Canada, have invented new and useful Improvements in Hoisting-Machines, ot' which the following is a specification.

This invention rel atcs to an improvement in that class ot' hoisting-machines which are employed for hoisting stones and other loads in building operations, and for various other purposes, a-nd which consists essentially of a drum around which the rope or chain is wound, to which theload is attached, and which is provided withmechanismwhereby the connection between the moving power and the drum can be broken when the load has been raised to the desired height, and with a brake by which the descent of the load can be controlled. l

The object ot' my invention is to construct a simple and cheap hoisting-machine of thisclass, which iseasily operated and controlled; and my invention consists of the peculiar construction of the mechanism whereby the moving power can be disconnected from the drum at desire, as will be hereinafter fully set forth.

In the accompanying drawings, consisting of two sheets, Figure l is an elevation of my improved hoisting-machine.. Fig. 2 is a longitudinal vertical section thereof'. Fig. 3 is an elevation of the rear end ot' the machine. Fig. 4 is an elevation of the driving-end of the machine. Fig."5 is a. sectional elevation of the mechanism whereby the vertical shaft of the machine is,raised and lowered, said mechanism being shown in a raised position. Fig. 6 is a similar view ot' said mechanism in its lowest position. Fig. 7 is a'vertical crosssection in line a? zr, Fig. 5, onan enlarged scale.` Fig. 8 is asectional top plan view of the lifting-leveron an enlarged scale. Fig. 9v is a fragmentaryNe/rtical section of the gear-wheels.

fly, ers of reference refer to like parts ii'r'thes `eral figures.

` AAjrepresent the longitudinal sills of the bed in`e,'and A A cross-pieces on which themsiilsrrest, these parts being suitably connected together by bolts, so as to form a rigid bed-frame for the machine.

b represents the vertical driving-shaft of the machine, provided at its upper end with a crosshead, B, to which are secured the sweeps B', to which the draft-animals are attached when the machine is driven by animal power.

The upper portion ofthe vertical shaft b turns in a bearing, c, which is formed on an arched standard, C, which extends across the bedframe of the machine, and is secured'with its feet to the sills A. The lower vertical portion ot' the shaft b turns in a bearing, cl, secured in arigid bridge-tree, D, which is attached to the sills A. The lower end of the vertical shaft b rests in a step-bearingc, formed in a bridgetree, E, arranged l below the""rigidefbridge-tree D and made movable, so that it can be raised and lowered together with the shaft b, resting thereon.v

F represents a bevel-wheel secured to the vertical shaft b between the legs of the arched standard C.'

G represents the drum upon which the rope or chain is wound and by which the load is suspended, and g is the horizontal shaft or arbor upon which the drum rotates. The shaft g is supported at one end in asocket, 71., formed in theupperportion ofthe arched standard C, in which it is secured by set-'screws h or other suitable means. The opposite end of the shaft g is secured in abearing, I, by set-screws. The bearing I rests upon a cross-pieceJ, which is secured between the sills A.

K represents an annular brake rim or wheel secured to or formed on the driving end ofthe drum G, and la is a brake-band surrounding the brake-wheel K and operated by a suitable lever, ca, which is pivoted to the stationary frame ot' the machine.

L represents a bevel-wheel secured to the driving end of the drum G and. adapted to mesh or gear with the bevel-wheel F on the shaft?) when the latteris in its raised position, as represented in Figs. 1, 2, and 4.

Z represents inclined annular faces or rims, arranged on the bevel-wheels F and L around the outer portionsof'the cogsorletll thereof in such manner that when the two wheels are thrown into gear the inclined faces Z thereof will run in contact with each other and prevent the outer faces of the teeth of one wheel from striking against the opposite wheel between the bases of the teeth thereof, as represented in Fig. 9. By this means excessive fric- ICO tion between the wheels is avoided, and the danger of breaking the teeth by throwing the wheels into gear is entirely obviated.

m represents a Xed T- bolt supporting one end of the movable bridge-tree E and secured in one of the sills A, the end of the bridgetree being provided on its under side with a notch, which rests upon theT- head at thelower end of the bolt and rocks on the same.

n represents a movable T-bolt, attached to the opposite end of the bridge-tree E, and eX- tending upwardly through the sill and through the foot of the standard C, above'which it is provided with mechanism for raising and loweringit. This mechanism consists of an elbow or knee shaped lever, O, havingits short arm connected by pivots lo with a cross-head, P, which is attached to the upperv end ofthe T'` bolt n. The long arm of the lever O extends outward at right angles to the short arm,and terminates in a suitable handle, theinner portion of the long arm of thelever resting upon the foot or base plate O of the standard C. The lever O is arranged in close proximity to the brake-lever le', so that the operator can conveniently handle either or both levers, as may be desired.

Q represents a gear-wheel or rim secured to the outer end of the drum G, and q is a pinion meshing in said wheel and mounted on the inner end of a horizontal shaft, r, which turns in bearings s, cast on or secured to the bearing I, andwhich is provided at its outer end with a hand-crank, T, whereby the pinion may be rotated.

Assuming the parts to be in the position represented in Figs. 1 to 4, the motion of the vertical driving-shaft b is transmitted to the drum G by the gear-wheels F and L, and the drum is rotated in a direction in which the rope is wound upon the drum, and the load is thereby raised. When the load has been elevated to the desired height the operator raises the outer end of the elbow-lever O, whereby said lever is turned on the pivots p, so as to withdraw the long arm of the lever from the support O on which it rests, thereby permitting the bolt a and the end of the bridge-tree E, attached thereto, to descend until the short arm of the lever comes in contact with the supporting-plate O and arrests the downward movement of the bolt u and bridge-tree E. The vertical shaft and the gear-wheel F, attached thereto, descend at the same time, whereby the wheel F becomes disengaged from the wheel L, thereby disconnecting the driving mechanism l'rom the drum. The operator at the same time bears down on the brake-lever, and either supports or lowers the load by means of the brake, asiiiay be desired. After the load has been lowered and the rope has been attached to another load to be raised the slack of the rope', if any, is taken up by turning the drinn by means of the hand-crank T. The operator now depresses the long arm ot' the lever O, thereby raising the bolt a and the bridge-tree E and bringing the wheel F in engagement with the wheel L.

The employment of a mechanism for throwing the wheels F and L in and out of gear permits the driving mechanism to be disconnected from the drum without first arresting the motion of the motor, whereby the operation of elevating the load is quickly stopped at the desired point and without first backing the motor, as isnecessary when clutch-couplin gs are lenfiploy'edL1 'for the purpose.

The heel or corner of the elbow-lever O, at the junction of the short and long arms of the lever on which it turns on the plate O in shifting it from one arm to the other, is preferably faced with steel to reduce wear and friction.

I claim as my invention- 1. In a hoisting-machine, the combination, with the drum G, provided with a gear-wheel, L, of the vertical driving-shaft b, provided with the gear-wheel F, and mechanism whereby the driving-shaft and the gear-wheel attached thereto can be raised and lowered, thereby throwing the gear-wheels in and out ot' gea-r, substantially as set forth.

2. The combination, with a drum, G, provided-with a bevel-gear wheel, L, of a movable shaft, b, provided with a bevel-gear wheel, F, and inclined annular faces l, formed on said gear-wheels around the teeth thereof, whereby the faces of theteeth of one wheel are prevented from bearing against the opposite wheel, substantially as set forth.

3. The combination, with a drum, G, provided with a gear-wheel, L, of a vertical drivin gshaft, b, provided with a gear-wheel, F, a movable bridge-tree, E, in which the lower'end ot' the driving-shaft is supported, and mechanism whereby said bridge-tree can bc raised-and lowered, substantially as set forth. 4. The combination, with a drum, G, yprovided with a gear-Wheel, L, of a vertical movable shaft, b, provided with a gear-wheel, F, a movable bridge-tree, E, supporting the lower end of said vertical shaft, and a bolt, a, and

elbow-lever O, whereby said bridge-'tree can be raised and lowered, substantially as set forth.

A. DOBBIE. Witnesses:

JNO. J. BoNNEu, CHAs. F. GEYER.

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