US959630A - Horse-power hoist. - Google Patents

Description

A.- M. SMITH.

HORSE POWER HOIST.

APPLICATION FILED NOV. 1, 1909.

959,630., Patented May 31,1910.

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HORSE POWER HOIST.

APPLIOATION FILED NOV. 1, 1909.

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HORSE POWER HOIST.

APPLICATION FILED NOV. 1, 1909.

959,630w Patented May 31, 1910.

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A. M. SMITH.

HORSE POWER HOIST.

APPLICATION FILED Nov. 1, 1909.

Patented May 31, 1910.

4 SHEETS-SHEET 4.

ifmez ADAM M. SMITH, 0F MINNEAPOLIS, MINNESOTA.

HORSE-POWER. HOIST.

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Specification of Letters Patent.

Patented May 31, 1910.

Application filed. November 1, 1909. Serial No. 525,682.

To all whom it may concern:

Be it known that I, ADAM M. SMITH, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful 1m rovements in Horse- Power Hoists; and do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My present invention has for its especial object to provide an improved horse power hoist, but most of the features thereof are capable of general use in horse power mechanism.

The invention consists of the novel de vices and combinations of devices herein after described and defined in the claims.

Generally stated, this invention is in the nature of an improvement on the mechanism disclosed and claimed in my prior patent entitled Horse-power and hoist, No. 845,201, issued of date February 26, 1907.

Chiefly, the present invention is directed to the improved features of construction especially adapting the horse power for use in connection with a pair of reversely movable counterbalancing cars or load-carrying devices.

From a broad point of view, the present improved horse power hoist bears close resemblance to and, in some respects, is identical with the horse power mechanism disclosed and broadly claimed in my said prior patent and, hence, such analogous parts will be herein but briefly described.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings, Figure l is a plan view of the improved horse power mechanism, some parts being broken away; Fig. 2 is a transverse vertical section taken approximately on the line x 00 of Fig. 1, some parts being shown in full; Fig. 3 is a detail, partly in plan and partly in horizontal section, showing one of the two reversely acting cable driving clutches; Fig. 4 is a transverse section taken on the line 02 m of Fig. 3; Fig. 5 is a transverse section taken on the line m 00 of Fig. 3; and Fig. 6 is a view in elevation, with some parts broken away and some parts sectioned, showing an improved ar "angement of the counterbalancing reversely movable hoisting cars and 00- operating guides and cable connections thereto.

A large horizontally disposed drive wheel 1 is rotatively mounted on the hub of a heavy upright tubular center bearing 2 which, at its lower end, is rigidly supported by a framework 3. The said drive wheel is provided, at its lower edge, with a large annular bevel gear 4: and with a projecting annular flange 5, which latter works between vertically spaced guide wheels 6 mounted in suitable bearings on the framework 8. These guide wheels 6 serve to support the drive wheel at its peripheral portion.

Mounted in suitable bearings 9, secured on the framework 3, and extended diametrically through the lower portion of the fixed center bearing 2 and the projecting bearings thereon, is a countershaft 10 pro vided, at one end, with a bevel pinion 11 that meshes with the large annular gear 1 of the drive wheel. Loosely journaled on the countershaft 10, one on each side of the center bearing, is a pair of cable driving drums 12 provided on their inner faces with cylindrical cavities in which split spring clutch rings 13 are arranged to work. Secured on the countershaft 10, adjacent to the inner face of each cable driving drum 12, is a driving hub 14; provided with an eccentric hub 15 in which is journaled small clutch actuating rock shafts 16. At their inwardly projecting ends, the rock shafts 16 are provided with projecting arms 17, and the other ends 18 of the said rock shafts are flattened or made angular and are interposed between the adjacent ends of the cooperating spring clutch rings 13. At their free ends, the arms 17 are provided with hearing shoes, preferably afforded by the heads of screws 19 adjustably secured to the said arms with their said heads arranged to be engaged by cam acting collars 20 slidably mounted on the countershaft 10 and provided with beveled outer ends. The two cam hubs 20 are provided with annular grooves that are engaged by pronged arms 21 of a clutch reversing rod or bar 22, which latter is mounted to slide diametrically through the center bearing 2 just above the shaft 10. At its central portion, the reversing rod 22 is engaged by the depending end of a bell crank 23 pivotally mounted within the tubular center bearing 2, with its short upper arm pivotally connected to the lower end of a plunger 24 arranged to slide vertically and axially through the upper end portion of the center bearing. The upper end of the plunger 24 is connected to one arm of a bell crank 25 mounted in a suitable bearing on the platform 7 and havin its other arm connected by a rod 26 to a latch lever 27, which latter is pivotallyconnected to and cooperates with a lock segment 28 rigidly secured on the said platform 7 In the present mechanism, as in my prior patent, motion is communicated to the drive wheel or turntable 1 from a telescopically extensible sweep 29, provided at its inner end with an extension bar 29" and a head 30 journaled on the upper end of the center bearing 2, and through a cooperating flexible clamping band 31, preferably of spring steel, one end of which is pivotally connected to said sweep at 32 and the other end of which is pivotally connected to one arm of a bell crank 33 that is also pivotally connected to said sweep. The other arm of said bell crank 33 is connected by a rod 34 to a latch lever 35 that cooperates with the latch segment 36 rigidly secured on the platform 7, which is carried by the reach extension bar 29 The clamping band 31 surrounds and is frictionally engageable with the upper peripheral portion of the said drive wheel. To the extreme outer end of the sweep 29, a so-called hitch lever 37 is intermediately pivoted and the rear end thereof is connected by a link or coupling rod 38 to the clamping band 31 at a point 39, which point is on the same side of the sweep as the bell crank 33, but is quite distant therefrom. Vhen the sweep 29 is made adjustable, the link 38 should also be made adjustable so as to maintain, at all times, the proper relative length of the said two parts. In all positions of the said parts, the adjustments thereof should be such that, when a horse is hitched to the front end of the hitch lever 37 and is driven in the proper direction to rotate the drive wheel, to-wit, in the direction indicated by the arrow marked on Fig. 1, the draft strain, when the clamping band is set upon the drive wheel, will exert a force tending to hold the clamping band more tightly set.

To prevent backward rotation of the drive wheel or turntable 1, it is provided, at its lower portion, with internal ratchet teeth 40 that are engaged by a spring pressed retaining pawl 41 mounted on the framework 1, as best shown in Fig. 1. The driving cable 42 is given several wraps around each of the driving drums 12 and is passed around a large horizontally disposed idle guide sheave 43 suitably journaled on the framework 3 in posit-ion to properly guide the cable to and from the said drums, as shown in Figs. 1 and 2. Then the cable is used to support and reversely move the counterbalancing elevator cars, it is extended over suitable guides and connected to the said cars, preferably as shown in Fig. 6.

Referring to Fig. 6, the numeral 44 dicates the elevating and hoisting cars whlch are guided for vertical movements by upright guide columns 45, shown as secured, at their lower extremities, to a base bar 46 and, at their upper extremities, to a top bar 47. From the cars 44, the cables 42 are passed over upper guide sheaves 48 mounted on suitable bearings on the top bar 47, and from thence said cables run downward and under lower guide sheaves 49 mounted in suitable bearings 50 secured to the base bar 46. From the said sheaves 49, the cable runs to the drums 12, as already indicated. A driver seat 8 is also carried by the reach extension bar 29 In the use of this improved hoist or elevator mechanism, in the erection of high buildings, it is necessary, from time to time, as the building is built higher and higher, to increase the height of the car guiding columns and, to facilitate this adjustment, I preferably form the said columns each of a multiplicity of tubular sections connected at their abut-ting ends by telescoped joint bolts or dowel pins 51. The upper and lower tubular sections may be secured to the bars 47 and 46 in any suitable way.

The operation of the device is probably obvious from the foregoing description, but the following brief summary thereof is considered advisable.

hen the sweep 29 is rotated around the center bearing, by the travel of the horse hitched to the hitch lever 37, the clamping band 31 will always move therewith. When it is desired to throw the cable into act-ion, for the purpose of moving the hoisting or elevating cars, the clamping band 31 is tightened on to the flange of the drive wheel or turntable 1 by manipulation of the latch lever 35. By manipulation of the latch lever 27, either one of the driving drums 12 may be coupled to the countershaft 10, which shaft is driven through the gear 4 and pinion 11, when the driving wheel 1 is rotated. When the right hand driving drum 12, as viewed in Fig. 1, is coupled to the said countershaft, the left hand car 44, as viewed in Fig. 6, will be raised and the right hand car will be lowered. Conversely, when the left hand driving drum 12 is coupled to said countershaft, the right hand car 44 will be raised and the left hand car will be lowered. The weight of these two cars, of course, counterbalance each other, thus reducing to a minimum the amount of energy required to raise any load.

The manner in which either of the driving drums 12 is coupled to the shaft 10 is as follows :VVhen the reversing rod 22 is moved toward the right, for example, in respect to Fig. 3, the cam sleeve 20, acting on the bearing foot 19 of the lever 17, rocks the shaft 16 and causes the angular end 18 thereof to further separate the ends of the cooperating clutch band 13, thereby expanding the said clutch band into frictional engagement with the cooperating seat in the said driving drum. WVith this arrangement of clutch actuating and reversing device, it is evident that the two driving drums will be alternately thrown into engagement and that the one will be thrown out of action simultaneously with the throwing of the other into action. The hoisting cars may, however, at any time, be brought to a standstill without stopping the horse or the movement of the sweep, simply by throwing the lever forward, thereby causing the bell crank 33 to release the clamping band 31 from engagement with the cooperating flange of the driving wheel 1. Also, by manipulation of the lever 35, the clamping band 31 may be set under any desired tension on the driving wheel and thereby used as a brake to control the downward movement of a loaded car, when desired.

hat I claim is:

1. In a horse power mechanism comprising a sweep, a horizontally disposed driving wheel, means for connecting said sweep and wheel at will, a pair of cable driving drums located beneath and covered by said driving wheel, means for alternately driving said drums from said driving wheel, and a cable working on and arranged to be driven in reverse directions by said drums.

2. In a horse power mechanism, the combination with a sweep, a driving wheel mounted on a center bearing, and means for connecting said sweep to said wheel at will, of a counter shaft driven from said driving wheel, a pair of cable driving drums loosely journaled on said countershaft, clutches for connecting said drums to said shaft, a clutch reversing mechanism operative on said clutches to alternately connect said drums to said countershaft, and a cable working on and arranged to be reversely driven by said drums.

3. A horse power mechanism comprising a sweep and a driving wheel mounted on a common center bearing, means for connecting said sweep to said wheel at will, a horizontal countershaft driven from said driving wheel, a pair of cable driving drums loosely journaled on said countershaft, clutches with connections for alternately connecting said drums to said countershaft, a horizontally disposed idle guide sheave in the vicinity of said drums, and a cable working around said drums and passed around said idle sheave, the latter serving to receive the cable from the one drum and to guide the same to the other drum.

4. In a horse power mechanism, the combination with a driving wheel mounted on an upright center bearing, of a horizontal countershaft driven from said driving wheel, cable driving drums loosely journaled on said countershaft, clutches for connecting said drums to said countershaft, a. clutch reversing lever carried by said driving wheel and having connections to said clutches for alternately rendering the same operative, a cable arranged to run over and to be reversely driven by said drums, a sweep, a.

clamping band frictionally engageable with said driving wheel and connected to said sweep at one end, a lever carried by said sweep and connected to the other end of said clamping band, and a second lever carried by said driving wheel and connected to the lever at the end of said clamping band, for connecting said sweep to said driving wheel at will.

5. I11 a horse power mechanism, the combination with an upright tubular center bearing, of a driving wheel and a sweep journaled on said center bearing, said driving wheel having an annular gear, of a counter shaft extended through the lower portion of said center bearing and provided with a pinion meshing with said annular gear, means for connecting said reach to said driving wheel at will, cable driving drums loosely journaled on said countershaft, one on each side of said center bearing, clutches for connecting said drums to said countershaft, a lever carried by said reach, a clutch reversing rod mounted to slide through the lower portion of said tubular center bearing, a bell crank within said tubular center bearing having its lower arm connected to said reversing rod, a plunger connected to the other arm of said bell crank and extended upward through said center bearing, a bell crank above said center bearing having one arm connected to the upper end of said plunger, and a link connecting the other arm of said upper bell crank to said lever, substantially as described.

6. In an elevator or hoist, the combination with a car, of guide columns therefor made up of tubular sections and bolts or dowel pins telescoped into the abutting ends of said tubular sections and making the said columns extensible, substantially as described.

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

HARRY D. Kinconn. F. I). MERCHANT.

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