US1331414A - Pulling and lowering implement - Google Patents

Description

J. S. CLARKE. PULLING AND LowERlNG IMPLEMENT.

RENEWED JULY 3, |919.

Patented Feb. 17,1920.

2 SHEETS-SHEET l- APPLICATION FILED FEB. I2, 1917.

lllvlllllll llll el Noun? 3 J. S. CLARKE. PULLING AND LOWERING IMPLEMENT. APPLICATION FILED FEB. I2. IsII. IIENEwED IuLY s. IQIQ.

Patented Feb. 17,1920.

2 SHEETS-SHEET 2.

Egg Wl atroz up sterne PATENT onnion.

JOHN S. CLARKE, 0F EAST CLEVELAND, OHIO, ASSIGNOR OF ONE-HALF TO CLAYTON L.

v PECK, OF CLEVELAND, OHIO.

PULLING AND LOW'ERING- IMPLEMENT.

Specification of Letters Patent.

Patented Feb. 17, 1920.

Application filedFebruai-y 12, 1917, Serial No. 147,986. Renewedaluly 3, 1919. Serial -No.'308,535.

To all 107mm t may concern.'

Be it known that I, JOHN S. Giannina citizen of the United States, residing at East Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Pulling and Lowering Implements, of which the following is a speciiication.

This invention relates to a pulling and lowering implement in whichr a cable is gripped between and wound around a set of sheaves geared together and operated by a hand crank, and the invention is of especialV utility wherever a powerful compact portable device may be needed for pulling, lift- A ing or lowering purposes.

In the accompanying drawings, Figures 1 and 2 are reduced views of the device looking from opposite sides thereof. F ig. 3 is a side view of the internal 4parts and a section of the casing on line 3 3, Fig. at.

Fig. e is a transverse section on `lined-J1, Fig. 3. Fig. 5 is a slee view ofthe brake mechanism and a section of the casing .on

line 5 5, Fig. 4. Fig. 6 is a horizontalv section and plan view on a larger scale than the foregoing figures, and Fig. 7 is a vertical section on line 77, Fig. 6.

The implement comprises a casing or shell 2 made of cast or stamped parts of metal with a main chamber 3 and a side compara ment 4.- A set of three sheaves 5, 6 and7,

of different diameters are provided with trunnions or separate shafts 9, 10 and 11, respectively, which extend transversely through the walls of the casing and are journaled therein. Each sheave is also provided with two annular collateral grooves and gear teeth at one side thereof, and the gear teeth 12 for sheave 5 mesh with the gear teeth 13 on the small sheave 7, andthe gear teetlrlS mesh in turn with the gear teeth 14 on sheave 6, see `Fig. 3. The shaft 11 for the small gripping sheave 7 has ,a square extension 15 projected outside of the casing 2, and a crank handle 16 is adapted to be removably engaged with said extension to rotatethe shaft and sheave 7 and the meshed gears and their corresponding sheaves also, and by such rotation to impart forward feed and pull on a cable 17, shown in the drawings as provided with a hook 18 at one end thereof. This cable enters the I and upwardly vand partlyaround the same and thence on a straight line `to the bottom of the second groove in sheave 7 where a pinching or gripping effect is obtained on the bite line between sheave 6 and sheave 7 and from which point of grip or bite the cable 17 passes freely out of the casing through an opening 20. Axle 10 is inclined relatively to aXle 11, see Fig. 3, thereby inclining sheave. 6 relatively to both Asheaves 5 and 7 so that the cable is received in the first groove at the top of sheave 6 on adirect line from the irstgroove in sheave 5 except for the bend produced by sheave 7, and is carried in its half turn downwardly about sheave 6 to a point in a straight line with the second groove at the bottom of sheave 5. The cable in passing from the second groove at the top of sheave 5 comes to the gripping point orbite of the second groove in sheaves 6 and 7 on a straight line, and the inclination given to sheave 6 separates it from sheave 7 at the first set of grooves therein to such an extent that the cable is free to pass beneath the first set of grooves without pinch orbite, whereas the surfaces at the second set of grooves in said sheaves are brought into closer relation to produce a pinch or bite onthe cable. Thus in rotating sheave 7 clockwise by cranhl 16 a forward movement is imparted to the cable where pinched and only a reasonable amount of grip or pinch is required because of the eX- tensive frictional Contact obtained by reaving the cable around the other sheaves which are geared to sheave 7 .and positively driven thereby, and the heavier the load or pull the more tightly the cable will be stretched over and around the sheaves 5 and 6 and against sheave 7. In this way the gripping effect on the cable is distributed over all the sheaves and slipping of the cable prevented and the feed of the cable is positive at all the sheaves because of their` geared connection with the crank shaft 1l.

A double cranking arrangement is also 14 and their respective sheaves.

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preferred for a pulling instrument of this kinch so` that the device may be either slowly or quickly operated. 'Therefora I provide supplementary gearing which is adaptedto be operated by a second crank 21, or by the same crank 16 when removed from extension 15 on one side ofthe casing and shifted to a square shaft 22 projectingA Y from the opposite side ofthe casing, see Figs. 4 and 6. This shaft has a pinion gear 23 thereon located in compartment 4 which also contains a dished or recessed gear 24 in meshed engagement with Jinion 23. Gear 24 is keyed or otherwise a Xed to .shaft 11` so that when rotation is imparted thereto through crank 21 on shaft 22 increased power will be transmitted. at a slower speed to gear 13 and therethrough to gears 12 and Back rotation of thev gears, Whether operated from one side of the casing or the other, is prevented by a spring pressed pawl 25 located at` the bottom of compartment 4, and said lpawl may be thrown out of engagement the device isjnot limited to the mere pulling` of objects, but may also be used as a lowering device to deposit any given load from a suitable height to a .lower elevation, and such lowering may be controlled by a fric- 'tion l.brake com rising a air of friction shoes l28 arranged diametrically Vopposite each other within the circular recess or side of the dished gear 24, see Fig. 5. A radial movement of shoes 28 and a braking action is obtained by rocking an oscillatory inember 30 on its supporting hub 31, this movement being communicated to the shoes by toggle links 32, and the oscillating movement beingl effected by an eccentric 38 on the inner end of t-he short shaft of lever 34 which is journaled in the wall of casing 2 above shaft 11, see Fig. 4. Lever 34 throws the shoes either in or out of engagement with grooved wall 29 of gear 24 and permits or prevents its rotation and therethrough acts with like effect on the remaining gears and their respective sheaves. v

The casing is also provided with ears 35 at one end or corner thereof to which the hook 36 or other anchoring device is aiiixed and which hook is substantially in a straight line with the line of pull on the end of cable 17 having hook 18.

What I claim is:

1. In a pulling instrument, 1 a pair ofl sheaves each having a pair of annular grooves and a third sheave having a pair of grooves and inclined to rotate ina plane with one of its grooves closely adjacent, a groove in one of the sheaves. and its other groove diagonally related tothev pair of grooves in the other sheave, a cable rove apen said sheaves, and means to impart rotation jointly to all three sheaves.

2. In a pulling instrument, a casing having three sheaves journaled therein and geared to rotate together, a .cable` rove around a pair of said sheaves and gripped between .the third sheave and one of said pair of sheaves, crankingmeans for said sheaves,` and a pawl to stop reverse movements of said sheaves.

3. In ai pulling instrument,v an inclined sheave and a second sheave opposite thereto rate crank shaft extensions and carino' on opposite sides of said instrument to rotate said Vshl'saves at different speeds.Y

5. In a pulling instrument, a rotatable cable-feeding member, a pair of sheaves opposite said member, a cable rove upon said sheaves and gripped between said member and one of said sheaves, gearing for said member and sheaves, crank means to operate said gearing, and a friction brake to control the rotation of said sheaves.

6. In a pulling instrument, a casing having collateral chambers, a set of sheaves in geared connection in one chamber, a cable rove upon two of said sheaves and gripped for feed' movements by the third sheave, a

`gear and pinion `in the other chamber, and

cranking means to rotate thethirdl sheave direct or through said pinion and gear.

7. In a pulling instrument, a vcasing and a set of sheaves journaled therein and geared to rotate together and having a projecting shaft for crank engagement, a cable rove upon two of said sheaves in feeding gripping engagement with a third sheave, a dished gear-and a gear pinion having a crank shaft to rotate said third sheave, and frictionpbraxe within said dishedV gear to control rotation .of said sheaves and unwinding movements Vof said cable.

8. In a pulling instrument, two sheaves mounted to rotate on parallelfaxes extending transversely'` ofsaid casing, a 'third sheave mounted to rotate on an axis extending transversely of said casing but inclined relatively to said parallel axes, a cable rove around two of said sheaves and gripped for feed movement by the third sheave, intermeshing gears for said sheaves to rotate them jointly, and supplemental gears to roannular grooves oollaterally therearound, a tate said sheaves at slower speed and with cable rove around one of said two sheaves 10 increased pulling power. and said third sheave and pinched by the 9. In a pulling instrument, a easing, two other of said pair of sheaves. 5 sheaves mounted to rotate on parallel axes, Signed at Cleveland, in the county of a third sheave mounted t0 rotate in an in- Cuyahoga, and State of Ohio, this lst da7 clined plane on an aXis inclined to said of February, 1917.

` f parallel axes, each sheave having a pair of J CHN S. CLARKE.

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