US737830A - Hoist. - Google Patents

Description

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v PATENTED SEPT. 1, 1903. O. G. DURYEA & M. 0. WHITE. I

HOIST.

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No. 737,830. PATENTED SEPT. 1, 1903. 0. G. DURYBA & M. G. WHITE.

HOIST.

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UNITED STATES Iatented September 1, 1903.

PATENT OFFICE.

DTIIO O. DURYEA AND MORRIS C. IVHITE, OF LOS ANGELES, CALIFORNIA.

HOlST.

SPECIFICATION forming part of Letters Patent No. 737,830, dated September 1, 1903. Application filed September 4, 1902. Serial No. 122 143. (No'modeh) To all whom it may concern:

Be it known that we, OTHO C. DURYEA and MORRIS 0. WHITE, both citizens of the United States, both residing at Los Angeles, in the county of Los An geles and State of California, have invented new and useful Improvements in Hoists, of which the following is a specification.

Our invention relates particularly to powerdriven hoists, and has for its object to produce a hoist which is simple in construction, reliable in operation, and having a very compact mechanism which is self-contained.

Another object of our invention is to provide a hoist in which the gearing is entirely inclosed and protected from damage.

Another object is to reduce the thickness of the gears and provide for an equal distribution of the strains on the gearing and other parts.

Another object is to provide for a perfect lubrication of the gearing.

Referring to the drawings, Figure I is a side elevation of the hoist, showing a gas-engine as the motive power. Fig. 11 is an enlarged sectional view taken on line 11 II of Fig. I. Fig. III is a side view of the drum, band-wheels, and hand-levers. Fig. IV is a view showing the gearing for operating the drum. Fig. V is a detail of a portion of a friction-band.

As shown in the drawings, a gas-engine 1 is used as the motive power.

2 designates thedriving-shaft of the engine. One end of the driving-shaft is journaled in a suitable bearing 3, the other endof the shaft being journaled in a similar bearing. (Not shown.)

4 is a fly-wheel keyed to the shaft 2. The fly-wheel is provided with a long hub 5, and rotatably mounted on the hub 5 is an intermediate band-whe-el 6, the periphery of which is double-flanged, as at 7, and between the flanges is a friction-surface 8. The intermediate band-wheel is preferably. webbed, as at 9, and provided with three bosses 10, which are preferably spaced at equal distances apart. Passing through each boss is a shouldered pin 11, and rotatably mounted on the pins 11 are three intermediate gears 12.

13 is a driving-gear rigidly mounted on the shaft 2 and which meshes with the interme diate gears 12.

Rotatably mounted on the shaft 2 is a drum 14, the inner end of which is provided with a flange 15, the outer end having a flange 16. The inner end of the drum is preferably webbed, as at 17, and provided with a hub 18. The outer end of the drum is provided with a hub 19 and spokes 20. The shaft 2 passes through the hubs 18 and 19.

21 is an annular band-wheel flanged as at 22, and between the flanges is a friction-surface 23. The band-wheel'21 is mounted concentrically with the drum, being fastened to the flange by means of bolts 24. One side of the band-wheel 21 may be flanged, as at 25, to form a casing, the intermediate gears lying in the space between the flange 25 and the flange 15. The inner rim of the bandwheel 21 is provided with teeth which form an internal gear'26, with which the respec= tive intermediate gears 12 are in mesh.

It will be seen that the gearing just described is completely inclosed and protected by the webbed band-wheel 6, flanged drum 14:, and flanged band-wheel 21.

The operation of the drum 14 may be regulated by preventing the rotation of one or the other of the band-wheels, and the mechanism for accomplishing this purpose will now be described.

Passing around each band-wheel and lying in its peripheral groove is a friction-band 30, two of these bands being provided, one for each band-wheel. Each end of a frictionband is coupled, as at 31, to rods 32 and 33. The inner facesof the friction-bands are preferably provided with blocks or shoes 34, (see Fig. V,) which bear against the friction-surfaces of the respective band-wheels.

35 is a bracket which is mounted on the base of the hoist and is provided with two pairs of segmental ratchets 36. Pivoted between one pair of segmental racks, as at 37, is a hand-lever 38, which is provided with a toe 39. The toe 39 is connected with one of the rods 33, before mentioned, by'means of a pin 40. At a short distance above the pivotal point of the hand-lever 38 one of the rods 32, before mentioned, is attached, as at 41.

-12 is apawl pivoted to the hand-lever 3S,

they are pivoted, will revolve and carry thegearand the driving-gear.

which engages one pair of ratchets 36. A suitable spring-pressed rod 46 and finger-la ver 43 are provided on the hand-lever for operating the pawl.

4:4is another hand-lever similar to the hand lever 38, pivoted between the other pair of segmental ratchets. The hand-lever 44: is equipped similarly to the hand-lever 38 and is attached by the other set of rods 32 and 33 to the intermediate friction-band.

45 is a plate, washer, or collar placed between the driving-pinion and the hub of the fly-wheel of the engine and may be keyed on the shaft by the fly-wheel key. This washer or plate runs between the hub of the intermediate band-wheel and the teeth of the gears 12.

By pulling over a hand-leverits attached friction-band will tightly grip its frictionwheel and prevent the same from rotating. In Fig. I the hand-lever 44 is shown'pulled over,its pawl engaging the ratchet and holding the lever in position. band-wheel 6 is thus securely held from rotation by means of the friction-band-that is, assuming that the engine is running. Under these conditions the pivotal supports of the intermediate gears 12 are stationary, and the gears 12 are rotated by the driving-gear 13 in the direction indicated by the arrows, the gears 12 in turn driving the friction-wheel 21 and attached drum in a direction the reverse of the engine revolution as shown by the arrow. A very powerful drive is secured, as

the power is taken off the gear13 at three diiferent points and applied by the three'intermediate gears at three different points to the internal gear 26. The rotation thus imparted to the drum may be utilized in winding up the cable and hoisting the bucket or lift. (Not shown.) By releasing the bandlever 44: and slackening its attachedfrictionband and also releasing the hand-lever 38 and its attached friction-band the drum may revolve in a direction the reverse of that indicated by the arrow, this reverse movement of the drum being caused by the weight of the bucket or lift pulling on the cable wound on the drum. If the engine is stopped during this reverse movement of the drum, both.

hand-levers being released the intermediate gears will revolve on their axes ina direction opposite to that indicated by their arrows, and the intermediate band-wheel, to which idlers bodily in the same direction as the drum, but at a somewhat reduced speed proportional to the ratio between the internal It the engine is allowed to run during this reverse movement of the drum, the speed of rotation of the idlers on their axes will be less, but the speed of rotation of the intermediate band-wheel, on which they are pivoted, will be greater, and if the revolutions of the engine are equal to the revolutions of the drum as rotated by the weight of the bucket the rate of rotation of The intermediate the intermediate band-wheel, which carries the idlers, will be the same, and the intermediate gears will be moved bodily but not axially. The speed of the reverse movement of the drum may be regulated by the lever 38. By this triple-gearing eifect we are enabled and still secure as stronga drive as has heretofore been secured by the ordinary gear and single-pinion drive. This construction also equalizes the stresses on. the gearing and distributes the strains on the driving-gear and on the internal gear 26 at points concentric with the drum, so that cramping and twisting effects, with their attendant evils, excess ive friction, and wear on the bearings are avoided.

The gears may preferably run in oil, which may be placed inthe annular space formed between the inside of the friction-wheel 21 and the flange 15, the oil being retained in body by gravity at the lowest portion of the annular space and lubricating the internal gear as the latter revolves, the internal gear in turn picking up oil as it revolves and distributing it by contact with the intermediate gears, which in turn distribute it by contact with the driving-gear. Oil is further distributed by being picked up by the internal gear and dripping onto the other gears as the internal gear revolves. Perfect lubrication is thereby practically secured and the gears run with little noise. Moreover, as they are completely closed, except for a slight crack between the friction-wheels, they are protected from damage or from the wear caused by dust mingling with the oil and grinding between the teeth of the gearing or gettinginto "the bearings.

i It is obvious that many variations may be made in the herein-described embodiment without departing from the spirit of our invention.

' Having described our invention, what we claim, and desire to secure by Letters Patent of the United States, is-- g 1. A base, a webbed drum mounted on the base, a band-wheel on said drum, an intermediate webbed band-wheel, gearing connectingthetwo band-wheels, said gearing being between the web of the drum and the web of the intermediat'e'bandwheel, a friction-band ,on each band-wheel, means for tightening one frictio'neband, means independent of the first means for tightening the other frictionband, and means for driving the gearing.

2. In. combination with a drum, means for rotating. the drum embracing a band-wheel rigidly. attached to the drum, an internal gear on the bandwheel, an inwardlydirected close to the other face of the gear, said flanges forming walls for retaining a lubricant.

. g 3. In combination with an engine and the engine-shaft, a fiy-wheel rigidly mounted on to redueethe thickness of the gears two-thirds flange on the band-wheel close to one face of I 'the internal gear and a flange on the drum the shaft, a hub on the fiy-wheel, an intermediate band-wheel rotatable on the hub, a drum rotatable on the shaft, one end of the drum being closed and flanged, another bandwheel on the closed end of the drum and close to the intermediate band-wheel, an internal gear on the second-named band-wheel, a driving-gear on the shaft, andintermediate gears rotatable on the intermediate bandwheel and meshing with the internal gear and the driving-gear.

4. In combination with an engine and an engine-shaft, a fiy-wheel rigidly mounted on the shaft, a hub on the fly-wheel, an intermediate band-Wheel rotatable on the hub, a drum rotatable on the shaft, one end of the drum being closed and flanged, another bandwheel on the closed end of the drum and close to the intermediate band-wheel, an internal gear on the second-named band-wheel, a driving-gear on the shaft, an intermediate band-Wheel meshing with the internal gear and the driving-gear, said intermediate gears being spaced equally apart.

5. In combination with an engine and the engine-shaft, a fly-wheel rigidly mounted on the shaft, a hub on the fly-wheel, anintermediate band-wheel rotatable on the hub, a drum rotatable on the shaft, one end of the drum being closed and flanged, another bandwheel on the closed end of the drum "and close to the intermediate band-wheel, an internal gear on the second-named band-Wheel, a driving-gear on the shaft, and intermediate gears rotatable on the intermediate bandwheel and meshing with the internal gear and the driving-gear, friction-bands on the bandwheels, and means for drawing the frictionbands tightly against the band-wheels.

6. In combination with an engine and the engine-shaft, a fly-wheel rigidly mounted on the shaft, a hub on the fly-wheel, an intermediate band-wheel rotatable on the hub, a drum rotatable on the shaft, one end of the drum being closed and flanged, another bandwheel on the closed end of the drum and close to the intermediate band-wheel, an internal gear on the second-named band-wheel, a driving-gear on the shaft, intermediate gears on the intermediate band-wheel meshing with the internal gear and the drivinggear, pivoted hand-levers connected to the bands, and means for holding the levers in definite positions.

'7. In combination with an engine and the engine-shaft, a fly-wheel rigidly mounted on the shaft, a hub on the fiy-wheel, an intermediate band-wheel rotatable on the hub, a drum rotatable on the shaft, one end of the drum being closed and flanged, another bandwheel on the closed end of the drum and close to the intermediate band-wheel, an internal gear on the second-named band-wheel, a driving-gear on the shaft, and intermediate gears rotatable on the intermediate bandwheel and meshing with the internal gear and the driving-gear, and means for frictionally controlling said band-Wheel.

In testimony whereof we have signed our names to this specification, in the presence of two subscribing witnesses, at Los Angeles, in the county of Los Angeles and State of California, this28th day of August, 1902.

OTHO U. DURYEA. MORRIS 0. WHITE. Witnesses:

F. M. TOWSEND, J AMES R. TOWNSEND.

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