US1177265A - Hoist. - Google Patents

Description

.W. B. PAVEY & G. M. FRENCH.

Hols.

n APPLICATION FILED JULY 28, 1915. 1,177,265 Patented Mar. 28,1916` f ff/-12 z 5,234

UNITED sTATEs `IATEISIT OEEICE.

WILLIAM E. PAvEY ANI) ,GEORGE M.IRENCII, OE CHICAGO,- ILLINOIS, AssIGNOns To ECONOMY ENGINEERING COMPANY, or' CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

HOIS'T.

A Specication of Letters Patent.

'Patented Mar. as, 1916.

Application led. July 28, 1915. Serial No. 42,252.

Our invention4 relates to improvements hoists particularly for -use ineonnection for elevators and the likesuch asmay be driven by hand or other power.

One object of our invention is to provide a hoist which will at all times be positively I held against return or fall againstthe will of the operator by means of a ratchet or other such rigid non-return mechanism.

Another object of our invention is to provide means which willinsure the release of the load without danger to the operator and without possibility of getting out of control of the operator. Y

Another object is` to provide a hoist which may be lowered as rapidly as needbe without getting out of control of the operator and without being limited to the speedv at which the operator can turn the crank.

Other objects of our invention will appear in the specification.

The invention itself is illustrated more or less diagrammatically in the accompanying drawings, whereini Figure l isa side view part in section and part in elevation with parts broken away; Fig. 2 is a detail side elevation in part section showing the brake; Fig. 3 is a detail side elevation in part section showing the ratchet.4

Like parts are indicated by like letters throughout the several figures.

A, A is a frame work of the usual type. Mounted for rotation within it is the hoist drum A1 about which is wound the hoist cable A2.

A3 is a gear mountedfor rotation with the drum. In mesh with it is an idler pinion A4 which in turn is mounted for rotation on the shaft A".

A is an idler gear mounted for rotatio on the shaft A with the pinion A4.

B is the'hoisting or crank shaft rotatably mounted atone end in a bearing B1 adjacent which bearing is a thrust collar B2 rigidly attached 4to the' shaft B.

B3 iS a thrust washer of liber Or yielding material rotatably mounted on the shaft B and adapted to engage at one side the thrust collar B2, and at the other side the steel or 'metal washer B4.

' is pivotally mounted.

`C is a combined sleeve and nut screwthreaded on the endl of Ithe shaft B having rigidly mounted thereon the hand Crank C1. This sleeve passes through' the bearing C2 on one of the. frames A land is free to rotate on'and slide along the shaft. At its inner "75 y.

end it is thrust against the ratchet wheel C3 which is provided with ratchet teeth C4 in opposition to a dog C5 on the shaft A,v Between this wheel and the brake pulley B8 is interposed a thrust washer of fiber or other suitable material C".

C9 is a nut on the inner end of the sleeve C for the purpose` of limiting its longitudi-- nal movement within its bearing. It will be noted that the crank is socketed and engages the polygonal end of the sleeve or nut and may be removed therefrom. It is perfectly obvious that other driving means might be used.

`In order to insure that the quill or sleeve B5 will not fioat,-and to insure that when it` turns it will turn the shaft unless the shaft 'y is locked, we provi'de the' spring D contained within the quill pressing atone end on a shoulder D1, theother end on* a washer D2, which washer ridesagainst the ratchet wheel C3.

lVhenthe crank is turned the nut screws -up on the shaft with the shaft at rest'until the nut, the ratchet wheel, the driving sleeve and the intermittent friction disks or plates are all clamped rigidly together against the thrust collar. Vhen this takes place a further rotation of the crank will cause theshaft and the driving sleeve torotate thus Operating through a chain of gears to rotate the drum. The ratchet wheel meanwhile rotates with the rest. This continues as long as rotation of the crank or rotation of the nut in response to the cranleor other driving means continues. Nthecrank stops everything -else stops. If the operator lets go of the crank the tendency will be first with the Weight on the I cable to rotate allthe parts back -until the ratchet- Wheel is held by the ratchet, then the weight tending to rotate the drum will Valso experience shows to be 'the case, but

h more rapid by this method the load will be lowered only as fast as the operator can turn the crank. When isdesired to lower the load at a rate the brake is locked on the brake Wheel soV as to hold that Wheel and the lsh ft rigidly against rotation. The Qf'erator then rotates the `crank enough to release parts along the shaft. If the brake were met free the shaft Would be rotated by the load and catch up with the crank, but since the brake holds it the shaft *can not rotate and so the crank may be rotated on the shaft until'the end of the sleeve presses against the inner,end of the housing. The result of this will be to compress the sleeve on the opposed end of the shaft against the inner end ofthe bearing at the opposed end. This will hold the shaft frictionally against rotation. The operator then releases the crank leavingit on that position and manipulates the vbrake on the brake pulley. When he releases this brake the load-tends to unwind the drum and rotate the drivingsleeve. Since the shaft cannot turn, being y held frictionally against turning, there is no tendency for it to screw into the sleeve and tighten up'the .parts against the ratchet and the operator is free to manipulate the load by means of the brake and brake band alone.

l. A hand hoist comprising a rotatable shaft, a driving member therefor, a povver transmission member rotatably mounted on and in frictional engagement with the shaft, a ratchet wheel rotatably mounted on the shaft in frictional engagement with the transmission member, means responsive to relative rctati-sn of the shaft and driving member for holding the transmission member and shaft ag st relative rotation, means independent of the shaft for holding the transmission member against rotation When rotation'of thel pressure tending to press they and means responsive to relative rotation r) of the shaft and 4driving member for holding the shaft against rotation.

2. A hand hoist comprising a rotatable shaft, a driving member therefor, a power transmission member rotatably mounted on and in frictional engagement with the sha ft, a ratchet Wheel rotatably mounted on the shaftA in frictional engagement with the transmission member, means responsive to relative rotation of the shaft and driving` member for frictionally holding the transmission member and shaft against relative rotation, means independent of the shaft for frictionally holding the transmission member against rotation and means responsive to relative rotation of the shaft and driving member for frictionally holding the shaft against rotation.

3. A hand hoist comprising a rotatable shaft, a driving member therefor, apower transmission member rotatably mounted on and in frictional engagement with the shaft, a ratchet Wheel rotatably mounted on the shaft in frictional engagement with the transmission member, a locking pawl in engagement with the ratchet wheel, means responsive to relative rotation of the shaft and driving member for locking the transmission member, the shaft and the ratchet wheel together', independent means for holding the transmission memberagainst rotation and means responsive to relative rotation of the shaft and driving member for holding the shaft against rotation.

4. A hand hoist comprising a rotatable shaft, a driving member therefor, a power transmission member rotatably mounted on and in frict'i'onal engagement with the shaft, a ratchet Wheel rotatably mounted on the shaft in frictional engagement with the transmission member, a locking pawl in engagement with the ratchet Wheel, means responsive to relative rotation of the shaft' and driving member for frictionally locking the transmission member, the shaft and the ratchet Wheel together, independent means for frictionally holding the transmission `member against rotationiand means responsive to relative rotation ofthe shaft and drivingmember for frictionally holding the shaft against rotation.

5. A hand hoist comprising a rotatably mounted'-shaft, bearings therefor, a shoulder on one end thereof, a transmission sleeve rotatably mounted upon the shaft in frictionalv engagement with said shoulder, a pinion .and a brake drum both carried by the sleeve', a brake adapted to engage the drum, a ratchet Wheel rotatably mounted on vthe shaft and in frictional engagement with the end of the sleeve, a combined sleeve and nut screw-threaded and slidahly mounted on the end of the shaft opposed to the shoulder and means for rotating saidV nut on said A and a brake drum both carried by the sleeve, y

a ratchet wheel rotatably mounted on the Vshaft and in frictional engagement with the end of the sleeve, a combined sleeve and nut screw-threaded and slidably mounted on the end of the shaft opposed to the shoulder and means for rotating said nut on said shaft to move it longitudinally toward said shoulder to clamp the sleeve and ratchet wheel l vbetween it and the shoulder frictionally to 2prevent relative movement and means for continuing said rotation of the nut to rotate the shaft and the parts carried thereby to operate the hoist, a stop in engagement with said ratchet Wheel, and a. brake to hold brake drum against rotation.

7. A hand hoist comprising a rotatably mounted shaft, bearings therefor, a shonlder on one end thereof, a transmission sleevex member lioatmg upon-the shaft, means rerotatably mounted upon the shaft in frictional engagement with said shoulder, a pinion and a brake drum 'both carried by the sleeve, a ratchet Wheel rotatably mounted on the shaft and in frictional engagement with the end of the sleeve, acombined sleeve and nut screW-threadedand slidablv mounted on the end of the'shaft opposed to the shoulder and means for rotating said nut on said shaft to move it longitudinally toward said shoulder to clamp the sleeve and ratchet l wheel between it and the shoulder frictionally to prevent relative movement and for continuing said rotation of the nut to rotate the shaft and the parts carried thereby to operate the hoist, astop in engagement with v said ratchet Wheel, abrake to hold the brake drum against rotation, a collar carried by Copies of this patent may be obtained for ve cents each, by addressing the Commissianer or Patenti."

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the sleeve, the sleeve rotating means being adapted when moved in the reverse direction to draw said'collar against one of ythe bearings to hold the shaft separately against l.'

rotation.

8. A hand hoist comprising a shaft,.ay support in which it is rotatably mounted, a

transmission sleeve rotatably mounted on the shaft, a brake in opposition to said sleeve, a ratchet Wheel rotatably mounted on the shaft, a dog in opposition to said wheel, a combined sleeve and-nut slidably mounted on and in screw-threaded engagement with the shaft and means for rotating said nut to'hold the sleeve and Wheel against rotation with respect to the shaft.

9.A hand hoist comprising a shaft,` a support in which it is rotatably mounted, a transmission sleeve rotatably mounted on the shaft, a brake in opposition to said sleeve, a ratchetl wheel rotatably mounted on the shaft, a dog in opposition to said Wheel, a. combined sleeve and nut slidably mounted on and in screw-threaded engagement with tohold the sleeve and wheel against rotation With respect tothe shaft and means carried partially b v the nut for holding the shaft against rotation.

10. A transmission member comprising a shaft and means forJrotating it, a driven spori'sive to the will of the operatorfor locking such` driven member against movement` for locking the shaft against movement, a ratchet Wheel fioatmg on the shaft and 1n frictlonal engagement with the drlven memnormally in engagement with the ratchet Wheel. 1 A

Signed at Chicago, in the county of Cook and State of Illinois, this 23rd day of July` l Washington, D. C.

means responsive tothe shaft rotating means yloer and the shaft rotating means. and a dog

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