US827921A - Friction thrust for loose drums. - Google Patents

Description

N9- 827,921. PATENTED' AUG. 7, 1906.

- -A. LAMBERT.

FRICTION THRUST FOR LOOSE DRUMS.

APPLICATION FILED JULY 22. 1905.

3 SHEETS-SHEET 1.

%W 34 M Wm 97 fihmm (DZ/67W, 4

PATENTED AUG. '7, 1906.

A. LAMBERT.

FRICTION THR UST FOR LOOSE DRUMS.

APPLICATION FILED JULYZZ, 1905.

s SHEBTSSHEET 2.

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PATENTED AUG. 7, 1906.

, s SHEETS-SHEET a.

A. LAMBERT.

FRICTION THRUST FOR LOOSE DRUMS.

APPLICATION FILED JULY 2' 1905 Parser QFFICE.

ASHER LAMBERT, OF NEWARK, NEW JERSEY.

Specification of Letters Patent.

FRBQTIQN THRUST FOR LOOSE DRUMS.

Patented Aug. 7, 1906.

Application filed July 22, 1905. Serial No. 270,769.

To all whom it may concern.-

Be it known that I, ASHER LAMBERT, a citizen of the United. States, residing at 1 Johnson avenue, Newark, county of Essex, and State of New Jersey, have invented cer tain hew and useful Improvements in. Friction Thrusts for Loose Drums, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

The present invention relates to such constructions as have a drum or spool fitted to turn loosely upon a shaft and rotated by pressure against a friction-driver which is positively driven, so to turn the drum when engaged therewith In many 'hoisters which have a drum rotated by a friction-driver it is common to press the drum against the friction-driver by means of a pin extended into the end of the drum-shaft. Means is used to force the pin longitudinally, and the end of the pin is thus "subjected toheavy pressure and-friction,

which often causes overheating and cripples the whole hoister. In some holsters the pin is allowed to revolve with the drum-shaft and 'is pressed endwise by an adjustable screw Where attempts have been made to drive the drum much above the speed ordinarily used for hoisting, the end of the thrust-pin has become actually welded to the ressure-screw by the excessive heat, and t 1e hoister has- Besides the use upon hoisting-machines for hoisting thus been completely disabled.

with a derrick such drums are largely employed 1n winding the rope for logging and operating cableways to haul the load i hrough a great distance, which consumes a great deal of time unless the drum be rapidly revolved at a much higher speed than is commoli in derrick-hoisting.

The speed of revolution is in practice actually controlled by the overheating and friction which are created by' the great pressure upon the thrust-pin and its actuating-screw when the drum is rotated over one hundred revolutions per minute, and the usefulness of such a machine for the purpose of logging and operating cableways 1S enormously 1ncreased by any means which Wlll reduce such friction and permits. higher speed. ,This is attained in the present invention by fixing the shaft stationary in its bearings upon the hoistenframe and fitting the friction-driver, as well as the drum, to turn loosely upon the shaft and supporting the strain of pressing attached thereto.

the drum and friction-driver together by means of antifriction thrust-bearings applied one outside of the friction-driver and the.

other outside of the drum.

to one end of the shaft, in which a screw is fittedto press upon a central thrust-pin and a transverse key, by which the latter thrustbearing is forced longitudinally of the shaft to crowd the drum andfriction-driver together. As the screw which produces the thrust is supported upon the stationary shaft or bearing, as well as the-thrust-pin and the transverse key, there is no rotary motion to produce friction between these parts, and the drum may therefore be rotated at any'de sired speed without injury to these parts.

The thrust or friction is wholly transferred to the antifriction thrust-bearings between which the friction driver and drum turn upon the shaft, and there is ample room upon the shaft to construct these thrust-bearings of suitable magnitude to resist the thrustwithout injury.

The application of the invention to a hoisting-engine is shown in the drawings, in which Figure 1 is a plan of the hoisting-engine frame with two drums mounted thereon, one of the drums and a part of the stationary shaft being shown in section at the center line where hatched. Fig. 2 is an elevation of the hoisting-engine. of one of the drum-shafts with drum and friction-driver mounted to turn thereon between the thrust-bearings, the same forming a set of drum-fixtures for application to the bearings upon a hoister-frame to replace the ordinary-rotary drum-shaft with friction-driver Fig. 4 shows the inside of one of the antifriction thrust-bearing flanges containing a ball-race with balls therein, and

Fig. 5 is a central cross-section of-oneof the thrust-bearings Fig. 6 is a perspective view of the hoister.

A designates the frame of .an ordinary hoister on which two steam-cylinders B are shown and a crank-shaft C, which in practice carries a inion to mesh into the gear-wheels D upon t 1e friction-drivers E. The frictiondriver is shown as a cone of wood, and the hauling-drum F is shown formed with a hol low cone G, forming a friction-scat to en age the driver E. The shaft H of the hau ingdrum is shown fir nly fixed in bearings I upon the frame A by means of set-screws J, and the hub K of the friction-driver is shown formed with ai bushing L, which can be renewed when worn, seid bushing turning with the frictiorndriver upon the stationary shaft H.

One of the thrust-bearings is shown fitted An nntlfriction thrust-bearing similar to that just' described is shown applied to th shaft H at the outer end of the drum F, the raceway-plate a lying against the piste g,

forming the outer head oft-he druni F on d revolving with the said druni, while the reee way-plate I) is held stationery with the shaft by a key N, which 18 inserted transversely through a slot i in the shaft H and held mewably in piece by pins at the opposite sides of the shaft, as is usual. (Shown in Fig. 1.) The thrust-pin O is shown inserted in a hole in the center of the shaft, which extends from the key to the end of the shaft, end e nut is secured upon the end of "the shaft by forming it in a cup j, which is screwed tightly upon the end of the shaft, so to become fixed iirinly thereon. A shoulder Z is shown upon the shaft adjacent to the key, which, with the inner end of the cup j, serves to hold the shaft from end movement in the bearings I. The screw 7;: is reduced upon the end to the some size as the thrust-pin, and when turned in the out or cup j in the usual manner by hun d-lever l it forces the thrustpin against the key, which presses the outer thrust-collar against the drum and engages the drum forcibly with the friction-driver.

It will be observed thet'all of the parts employed in crowding the drum toward the friction-driver are stationery, being thus relieved from any rotating or moving friction, as the key N, the pin 0, the cup or nut the screw and the hand-lever l are held from rotation by the stationary ehemcter of the shaft, while the drum and friction-driver revolve loosely upon the shaft when in operation between the two thrust-bearings.

A hoisting-drum is shown mounted upon a stationary shaft ll, adjacent to the hauling-drum F, the hoisting-drum being much smaller than the liaulii'ig-drurn, as it is intended to wind the rope with less speed and movin the thrust-key N 3' attached to the end of the shaft-bearing next to the friction-driver,end the thrustbearing upon the outside of the frictiondriver being movable lengthwise of the shaft when the key is pressed toward it, while the friction-driver upon the outer end of the hoisting-drum is fitted egeinst the shoulder upon the shaft to prevent it from. moving.

Either construction operates precisely the same, although that shown in connection with the larger drum avoids any longitudinal movement of the friction-driver upon the shaft, which when the thrust-bearings are operated as shown upon the hoisting-drum moves a little outwardly when the spring M disengsges "it from the drum. Heretofore the shafts of hoisting-drums end. analogous spools have been rotated with the friction-driver, and therefore required journals and hearings fitted to turn one within the other and lined with entifrietion metal or equivalent moons of renewing the surface when worn. bearings upon the standards R maybe Inside perfectly solid without any expense of forrnmg cups and bolting them on and the shaft slipped endwise into the bearings by removint the cap 7" or on the shaft of the drum Vhere e. hoisting-machine has been disabled by the use of the old. construction with a revolving shaft and a thrust-pin revolving with the shaft, the hoister may be restored to usefulness byremoving the shaft and drum with their respective fittings and inserting a shaft such as is shown in Fig. 3, with thedrum endfiietion-driver fitted to turn loosely upon the shaft between the two thrustrbeeringsgrnd the screw K, mounted in a cap or nut directly upon the end of the shaft instead of upon the hearing, as has heretofore been necessary. The drum-fixtures (shown complete in Fig. 3) thus form a new article of manufecture, which may be made and applied to many hoisters of a standard type which are already in use, but which frequently become disabled from the friction of the thrust-pin.

It will be understood that the nut fonthe tlirust-screw i". can be bolted to or formed integral with one of the beerings, as the shaft when secured in such bearing is held SttttlOIl-.' ery the some as the nut and the thrust-screw and thrust-pin operate the same as if the By my construetionthe sheftnot were screwed upon the end of the shaft.

(See j in Fig. 1.)

it is obvious that the bearings for the shaft can be formed with bolted caps; but such construction is not necessary if the shaft be made to pull out of the bearings longitudinelly, as shown in Fig. 1, where the shaft next the friction-driver of the drum F is larger than at any other point, so that it can be pulled through its beering by first re-- letter be attached to the shaft.

In the drewings, steam-cylinders B are and the cop if the v hauling-drum, which coils are constantly the winding of the coils. 3

' vention, what is'claimed herein is upon the shaft at the outer end of the drum antifriction thrust-bearings.

shown, and a crank-shaft 0, connected by gearing with the friction-drivers; but the invention is applicable to hoisters actuated by electric motors or any other motive power, as the invention relates to the drum and its shaft and not to the motor agent. Electric hoisters are'now often used in hoistin'g materials to the top of tall buildings when in process of erection, and the enormous length of the rope which 'is wound upon the drum in such cases necessitates a ra id speed of the drum to avoid great loss of time in transmitting theload. My invention is applicable to such hoisters and is of greatvalue in removing the friction between the thrust pin and the thrust screw, which has heretofore limited the speed of hoisting-drums.

The hoisting-drum Q, is shown with high flanges at the ends, as the end of the rope is fastened: to the hoisting-drum and wound thereon; but the hauling or traversing drum F is-represented with low flanges, such as are used in traversing the carriage upon a cableway, in which case the coils do not accumu late upon the drum, as an endless rope is used and only a few coils are carried around the crowded toward one of the end flanges by The invention is applicable to drums of all kinds which turn oosely upon the shaft and are driven by a friction-driver.

Having thus set forth the nature of the in- 1. The combination, with a shaft having a drum or spool fitted to turn loosely thereon and provided upon its inner end with a friction-seat, of a friction-driver fitted thereto and ada ted to turn loosely upon the shaft, means fer rotating the friction-driver, an antifrictionthrust-bearing upon the shaft to prevent the end movementof the frictiondriver, and an antifriction thrust-bearing with means for pressing one of the thrustbearings toward the other toengage the drum and friction-driver, whereby the fric-' tion-driver and drum, when engaged rotate together upon-a stationary shaft between 2. The combination, with a shaft having a drum or spool fitted to turn loosely thereon and provided upon one end with a frictionseat, of a frictionedriver fitted thereto and adapted to turn loosely upon the shaft, and having a hubwith renewable bushing, a spiral spring encircling such hub between the drum and the friction-driver to separate them normally, an antifriction thrust-bearing upon the shaft to prevent end movement of the friction-driver, means for rotating the driver, and an antifriction thrust-bearing means attached to the shaft for pressing such bearing against the drum to engage'lt with the friction-driver, whereby the friction-driver and drum when engaged rotate together upon a stationary shaft. v

3. The combination, with a shaft having a drum or s 001 fitted to turn loosely thereon and provi ed upon its inner end with a frictionseat, of a friction-driver fitted thereto and adafpted to'turn loosely upon the shaft, means antifriction thrust-bearing upon the shaft to prevent end movement of the friction-driver,

or rotating .the friction-driver, an

an a'ntifriction thrust-bearing ap lied to the outer end of the drum, the sha t having a transverse slot adjacent to the outer flange of said thrust-bearing with key in the slot to .press u on the flange, and means attached to the en of the shaft for pressing the key to ward such outer flange to engage the drum with the fi'iction-driver, wherebythe friction-driver and drum when engaged rotate together upon a stationary shaft.

1 4. The combination, with a shaft having a drum or spool fitted to turn loosely thereon and provided upon its inner end with a friction-seat, of a friction-driver-fittedthereto and ada ted to turn loosely upon the shaft, means or rotating the friction-driver, an antifriction thrust-bearing upon the shaft to prevent the end movement of the frictiondriver, an antifriction thrust-bearing ap lied to the outer end of the drum, the shaft flaving a transverse slot adjacent to the outer flange of said thrust-bearing with key in the slot to press 11 on the bearing, a hole extending from the s ot to the end of the shaft with thrust-pin therein, a nut secured upon the end of the shaft with screw-thread in line with such hole, and a screw fitted to the nut to press the thrust- )in upon-the key, whereby the key, the pin, t e nut and the screw are stationary with the shaft, and the drum and friction-driver when engaged revolve together upon the shaft.

5. The combination, with a shaft having a drum or spool fitted to turn loosely thereon and having a friction-seat upon the inner end, of a ball-race secured upon the shaft adjacent to such end, a friction-driver fitted to turn loosely upon the shaft between said drum and ball-race and having a correspond ing ball-race with balls fitted-thereto, means to rotate the friction-driver, a ball-race applied to the outer end of the drum, a corre .sponding ball-race movable longitudinally upon the shaft with balls fitted to the said races, and means attached to. the shaft for moving the last-mentioned ball-race to ress the drum toward the friction-driver, w ereby the-ifriction driver and drum rotate together upon a stationary shaft.

6, The combination, with a shaft having a drum or spool fitted to turn loosely thereon and having-a friction-seat upon the inner end, of a ball-race secured upon the shaft adjacent to such end, a friction-driver fitted to turn loosely upon the shaft between said drum and ball-race and having a corresponding hall-race with balls fitted thereto, means to the movable hall-race with key therein and hole extended from the key to the end of the shaft, a thrustin fitted to such hole, a cap screwed upon t e end of the shaft and having threaded nut therein, and a. screw titted to the nut with point adapted to press upon the thrust-pin, whereby the outer hall-nice, the key, the pin, the nut and the screw are stationary with the shaft, and the drum and friction-driver when engaged revolve togetheiupon the shaft.

7. The drum-fixtures for application to the hearings upon the opposite sides of a hoister frame, comprising a shaft with journal near one end for clamping in the hearing, a thrust- 1 l l i bearing secured upon the shaft adjacent to such journal, a friction-driver fitted to turn upon theshaft in contact with such thrusthearing, a drum fitted to turn upon the shaft with friction-seat to engage the frictiondriver, a journal upon the opposite end of the shaft to fit the opposite frame-bearing, a thrust-hearing between such journal and the end of the drum, and means attached to the outer end ofthe shaft for pressing, such thrust-hearing against the drum, whereby the journals of the shaft are adapted to clamp rigidly in the hearings and the drum i and friction-driver when engaged revolve together upon the shaft.

In testimony whereof I have hereuntp set my hand in the presence oi two subscribing witnesses.

ASHER LAMBERT.

Witnesses:

E. M. BuRDIcK, 'lnoMAs S. CRANE.

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