US1417022A

US1417022A - Hoisting apparatus

Info

Publication number: US1417022A
Application number: US367616A
Authority: US
Inventors: Boehck William Edward
Original assignee: REVOLVATOR Co
Current assignee: REVOLVATOR Co
Priority date: 1920-03-22
Filing date: 1920-03-22
Publication date: 1922-05-23
Anticipated expiration: 1939-05-23

Description

w. E. oEHcK. .HQISTING APPARATUS. APPLICATION FILED MAR. 22. I9 20.

W. ELBOEHCK.,

` HOISTING APPARATUS. APPLICATION FILED MAR. 22.1920.

l ,VUQ v 'Patented May 23, 1922.

M ATTORNEY.

y WILLIAM EDWARD? :Boni-reir, or Jnnsny y To all ifi/wm t may concern mimosa y "Be it 'known that I, lWILLIAM EnwARD Bonnema `citizen of Germany, residing at Jersey City, in the county of Hudson and State of `N ew Jersey, have invented certainl l new and useful Improvements in Hoisting" Apparatus,ot'which the iollowing 1s a speciv fication,reference being` had to the accompanying drawings. y i y y l rlhis invention relates to improvements 1n hoisting apparatus, and

whichthe operator shall havethe load'at all times under his control and in which the load may belowered by him withsmoothness, ease, and safety to himself and to the i hoist. Anotherobject of this invention is l is a sectional end to provide mechanism by which y the power may be applied, in

'a hoisting-apparatus,

with smoothness and"` may be? kept under absolute control at all times. Other features or' this invention will become apparent as the description progresses.` i

lnthe drawings illustrating the principle of this invention and the best mode now known to me of applying that principle, F ig. y (or side) view of so much of a manually-operated hoist as is necessary to illustrate this invention, the section being taken on the line I--I of Fig. IIgFig. ll is a` section and' Fig. HI is a detail, illustratingthe drive-pinion in section and particularly the helical cani-surfaces thereon. i f i The drive-shaft a rotates inthe bearings Vb, bf ,which are supported by the structural?` ed on the-latter is a frictiondisk d, which shaft a. It follows that, since the frictiondiskcl` is keyed to the drive-shaft a, `these two members must` rotate together; while `the Speccationroi' Letters PatentI `Applaat-i011inea Marti; `e2, 1920. serial no.

particularly to improvements inhoistsot' the type adaptedand i `of vratchet-teeth 7c, y 'toes of a pair of pawls m (Fig. l),the heels on the line H411, of Fig. l'f;

i cifrar; naw innerer, nssieivon 'ro nnvonv-` Aron ooivrranir, or massi; Grrr, new .innen-f, a consonancia ornnw JERSEY,

Horsrma nrrannrns. A

Patented May 253, 1922., 367,616.

y friction-disk ci is held ytroni being pressed against the journal-box` Zi by the interposition of the split-ring 7?. A sleeve gis slipped over the drive-shaft a, which is free to turn within the sleeve g, @ne end of the sleeve g `abuts against a lateral face of the friction-l disk el, while its other end is `formediwith` an annular vflange or integral disk g. Mounted on the sleeve g is a sleeve @within f which the sleeve giits andto which the saine is `secured by the key flne end of the sleeve /a abuts against the flange or disk g formed onthe `inner sleeveg at one end thereof, while the other sleeve L is formed with an annular flange or integral disk L,

a lateral face of which is opposed to a lateral :tace or' the frictionsleeve 71 there isf disk d.' @n the outer mounted, tree to turn, the hub j of a ringshaped brake-drum j having" an overhanging annular rim or iiange j that extends axially oit the drive-shaft a, towards the `disk orl flange L, formed integral with i the outer sleeveiz. The interior cylindrical face of the rim or flange" j is tormed'with a series over which ride idly the end of the outer saV orbutt-ends of which are mounted,` free to turn, on the pivot-studs n that are screwed into andy carried by the flange or disk L., The pivot-studs n are arranged diametrically opposite eachother and the pawls m are pressed by springs m towards the ratchetteeth 7c. To one lateral face of the drivepinion o, there is fastened, by a dowel-pin of, a friction-diskp, a lateral face of which `is opposed toa lateral face of the liange or integral disk g inner sleeve g.

the drive-pinion o, there are formed a pair of helical cam-surfaces r, l'11',"which are diametrically opposed to each other and over which are arranged to travel the cam-rollers s, s', respectively. nto a hole g that extends through the drive-shaft a at right-angles tov and intersecting the longitudinal axis thereoi?, there is driven a pin z; both ends of which project beyond the drive-shaft a. rlhe camrollers 8, s', are mounted, free to rotate, on these -ends of the pin t and are secured in formed onone end of the place thereon by means` ot thenuts u. The

triction`-olisl y) and thev drive-pinion o are mounted loosely on the drive-shaft @,which may turn therein idly. p i y s,

The brake-drum y' is arranged to lie be- On the other lateral face of` with one another, whereupon tween a pair of brake-jaws e. of a brakemechanism of the type described in United States Patent, No. 1,197,597, and illustrated in Fig. 6 thereof. While the load is being raised, the brake-jaws c are held firmly pressed against the rim or flange j of the brake-disk y' against the ,tension of the coilspring jx, by turning the brake-controlling cam-shaft w in the proper direction, so as to cause the cams w to bear against the cam-rollers fw and force the upper ends of the brake-jaws c carrying the same, towards each other. In this way, the brake-drum j is held motionless.

The Vmode of operation of this hoisting apparatus may be brieliy described as follows: `Let it be assumed that a load is to be raised. A crank (not shown) is engaged with the squared end a of the drive-shaft a, which is turned in the proper direction to raise the load. As the shaft t begins to turn, the friction-disk d and the pin t will be rotated with it, while the drive-pinion o, friction-disk p, and sleeves g, h, remain, for the time being, motionless, since these members last-named are loosely mounted on the driveshaft. As the shaft a continues to turn, the cam-rollers s, s', ride up on the helical camsurfaces a", r., and, since the pin t cannot be moved lengthwise of the shaft a, the drivepinion o, friction-disk j?, and sleeves g, 7L, will be slid along the shaft a, towards the friction-disk d, until the friction between the latter and the disk t, between the disks g', gaand between the cam surfaces r, r', and the cam-rollers s, s', has increased to a degree at which these parts are frictionally clutched the system rotates with the drive-shaft a. The brakedrum y' is held motionless, however, by the brake-j aws fv, while the sleeve h rotates within its hub j and theclutching toe-ends of the spring-pressed pawls m mounted on the pawl-carrying disk h ride idly over the internal ratchet-teeth lo of the rim or flange j of the brake-disk j.L Y When the shaft a ceases ,to be turned by the operator, retrograde rotation of the shaft a is prevented and the load is held in its raised position, by the interlocking engagement of the toeends of the pawls m with the internal ratchetteeth 7c formed on the inner face of the rim j of the brake-disk j that is held fixed in position against rotation by the frictional pressure of the brake-jaws o. If it be desired to lower the load, this manoeuvre may beaccomplished in either of two ways, both of which are controlled, to-wit: First, the operator may release the grip of the brakejaws' c vby turning the cam-shaft w (and therewith .the cams wf) in such a direction that the coil-spring j* is permitted to expand and force apart theupper ends of the brakejawsffv. The friction .existing between the latter and the brake-disk flange j may be so regulated that the load may be lowered as slowly as may be desired. Second, while maintaining the hold of the brake-jaws lu on the brake-drum so as to restrain all rotation of the latter, the operator may turn the drive-shaft a backwards, thereby causing the cam-rollers s, s, to travel down (or into the hollow of) the cam-surfaces fr, f/f, and lessening the friction by which the disks y), g', and the disks d, L, are clutched together. This lessening of the friction between tlie parts just named will permit the weight of the load to overcome the resistance due to the friction, and the drivepinion o will be turned backward by the pull of the load. 7 hen the operator desires to stop lowering away the load, he simply holds the drive-shaft a, motionless, and the slight further rotation of the drive-pinion 0 causes the cam-rollers s, S, to ride up on the thicker or more projecting part of the helical cam-surfaces 11, fr, whereby the friction between the disks p, g', and the disks CZ, 7L', is increased to a point where independent rotation of the drive-pinion 0 is prevented and no rotation thereof can take place relatively to the drive-shaft a now held stationary.

l?referably the squared ends (1f, fwx, of the drive-shaft a. and brake cam-shaft yw, respectively, will be made of the same size and shape, so that the same crank will fit both squared ends. When the operator desires to release the brake-jaws c so as to lower away the load by the first method herenbefore explained, he will remove the crank from the squared end a of the drive-shaft a, in order that he may use the crank to turn the brake cam-shaft fw. Thus the operator will avoid the danger that would follow his leaving the crank on the drive-shaft a, which would rotate during the lowering of the load by the first method and would carry the crank around with it, thereby exposing the operator to being hit by the spinning crank.

I claim:

l. A hoisting apparatus including a drive-shaft; a pin angularly-disposed to and fixed upon the same; a drive-pinion mounted loose thereon and having one of its faces formed with a cam-surface over which the pin rubs; and a pawl-and-ratchet mechanism including a ratchet member and a pawl member, both of which members are mounted upon the drive-shaft; the drive-pinion and the pawl-and-ratchet mechanism being arranged to be pressed towards each other by the cam-action of the pin rubbing over the cam-surface, and the drive-pinion to be clutched frictionallv to the drive-shaft.

2. A hoisting apparatus including a driveshaft; a pin angularly-disposed to and fixed upon the same; a drive-pinion mounted loose thereon and having one of its faces formed witha` cam-surface over which the y pin rubs; a brake for preventing backward rotation of theydrive-shaft duringihoisting;

and means for releasing the brake to lower away the load while the drive-pinion remains clutched to the drive-shaft; the drive- `pinion and the brake being arranged to be pressedtowards each other by the cam-action lof the pin rubbing over the cam-surface and the drive-pinion to be-clutched frictionally to the drive-shaft; n

3j. A hoisting apparatus including a driveshaft; a friction-disk mounted-ast thereon; a drive-pinion mounted loose upon the driveshaft; means for forcing thedrive-pinion lengthwise along the drive-shaft towards the friction-disk and clutching the drive-pinion frictionallyto the drive-shaft; `a brake for preventing backward rotation of the driveshaft during hoisting; and means for releasing the brake to lower away theload while the drive-pinion remains clutched to the drive-shaft. t n n y l 4. A hoisting apparatus including a driveshaft; a vfriction-disk mounted `fast thereon;` `a brake member for preventing backward rotation of the drive-shaft during hoisting;

teeth formed onsaid brake member; `a pawlcarrying` member looselymounted on said drive-shaft; a pawl carried by said pawlcarrymgfmember and arranged to engage said teeth during backward rotation of the drive-shaft; a drive-pinion loosely mounted on the drive-shaft; means for forcing the drive-pinion and pawl-carrying member lengthwisealong the drive-shaft towards the friction-disk and clutching the `drive-pinion i and pawl-carrying `member ffrictionally to v the drive-shaft; and mechanism `for releasing the brake member to lower away the load t while the drive-pinion remains yclutched tol the drive-shaft.

5. A hoisting apparatus including a driveshaft; a friction-disk mounted fast thereon;

a brake-drum loosely mounted on the driveshaft; teeth formed on the brake-drum; brake-jaws for holding the brake-drum against rotation; a pawl-carryng member `loosely mounted on the drive-shaft; a pawl nism for releasing the grip of the brake-jaws i `on the brake-drumto lower away the load while the drivepinion remains clutched to the drive-shaft. l n

6. A hoisting apparatus including a driveshai't; a friction-disk mounted fast thereon; a brake loosely mounted on the drive-shaft;

a sleeve loosely mounted on the latter and` interlocked `with the brake; a drive-pinion loosely mounted on the drive-shaft; means for forcing the drive-pinion and sleeve lengthwise" along the drive-shaft towards the friction-disk and clutching the drive-pinion and sleeve rictionally` to the drive-shaft; and mechanism for releasing the brake to Vlower away the load while the drive-pinion remains clutched to the drive-shaft.

Signedat the city of Jersey City, in the county of Hudson and State of New Jersey, this thirteenth day ci March, 1920, in the presence `ofthe two undersigned witnesses.

WILLIAM EDWARD BOEHCK.

Witnesses: n

HENRY SHELDEN GERMOND, Jr., BRENTON Bocos.