USRE7727E - Improvement in hqisting-machines - Google Patents

Description

G. H. REYNOLDS,

Assignor to himself and G. H. Delamatel HUISTING-MACHINE. N0. 7,727. ReissuedJune 5,187T.

UNITED SnrrE'sv PATENT OFFI E GEORGE E, REYNOLDS, orrnw YORK, N. Y., ASSIGNOR TO HIMSELFAND.

OOBNELIUS H. DELAMATER, 0F SAME PLACE.

IMPROVEMENT IN HQISTlNG-M ACHINES.

- Specification forming part of Letters Patent No. 81,289, dated August 18, 1868; reissue No. 7,727, dated J une 5, 1877 application filed February 22, 1817.

To all whom it My concern Be it known that l, Gaoaqr: H. REYNOLDS, of the city, county, and have invented certain new and useful Inlprovemeuts in Hoisting-Machines; and'1do hereby declare that the following is a full and exact description thereof.

My invention is adapted for hoisting cargoes into and out of ships, raising and lowering the material and men in mines, and in all analogous situations; but it is more especially intended for those situations where a considerable number of hoisting-machines are to be worked from a sin gleengine-as, for example, I at the shafts of mines, where the shafts are oi such a size that several independent hoistingways are provided .in the same shaft, or on a dock, where a number of hoisting-engines for loading and unloading coal, and the like, may bedriven by a single line of shafting. I will first proceed to describe what I consider the best means of carrying out my in vention, and will afterward describe the points which I believe to be new therein.

The accompanying drawings forms part of this specification. v Figure-1 is a side elevation. Fig. 2 is a A is the fixed frame-work, made of cast-ironor. other suitable material.

B is a section of along main or driving shaft, which is rotated by a steam-engine or other power. (Not represented.) This shaft is extended, and holds the same relation to a numberof hoisting-machines to be driven by it, only one being represented. A feather, b, communicates therotating motionj'rom the shaft B to the friction gear-wheel B, the latter being free to move endwise on the shaft and feather, but being compelled to. rotate with- State of New York,

the shaft. The periphery of this friction gearwheel B is finished in V-snaped grooves, as represented.

O is a counter-shaft, such as is known 'a jack-shaft, and U is a large friction gear-wheel keyed or otherwise firmly fixed thereon. The periphery of this friction gea-nwhecl O is tinished in grooves V-shaped to correspond with the surface of the wheel B. The motion is transmitted from the wheel B to the wheel 0, and this from the shaft B to the shaft 0 at a reduced velocity, but with an increased force.

O is a brake-wheel fast on the jack-shaft U, by the 'side of the friction gear-wheel G, and adapted to receive the strapbrake D, which is mounted as represented, and adapted to be operated by the action of the foot on the treadle D, aswill be obvious.

(J is a'small tooth-pinion fixed on the jackshaft 0, and meshing into the larger toothed gear-wheel-E, which is fast to the drum E. There is a peculiarity in the construction of these wheels'which will bedescribed farther on'. The general 'efiect of the gearing is to transmit a slow and powerful rotatory motion it the wheel E. This drum winds up therope or chain, or, by being allowed to turn in the opposite direction, al-lows-the'latter to unwind according as the machine is required to hoist" or lowerLx- It will be understood that, in the act of unwinding, the brake D and its coiyncctions are used in the ordinary manner to"control the rapidity of thennwinding, consequently the lowering of the weight which is suspended, but being applied to act on a brake-wheel upon the jack-shaft, instead of one attached directly to the drum or drumshaft, its cfi'ect is increased by the tooth-pinion Cl on the jack-shaft gearing into the larger 4 tooth-wheel E on the drum.

It will be observed that the bearings of the shafts B and U are not directly on the frame work A, but are in boxes. I will describe these boxesseparately The boxes M N support the driving-shaft B, and also the godgeous or trunnions of the drum E. The bearings or g'udgeons' of; the drum:E are designatc'd E and are hollow extensions, cast or v away.

otherwise firmly fixed on the drum, and turned at the periphery to form small and durable bearings. A hole is provided quite through the gudgeons E, also through the drumE, of a greater diameter than the shaft B, so that it allows the shaft to turn freely without contact therewith. Theboxes M N are finished properly to form a suitable bearing for the gndgeons E and also to form a suitable hearing for a smaller shaft, B. This is effected by making the bearings each with an ofi'set, as represented, one-half, or about one-half, of the width of each box M N being adapted to serve as a bearin g for the shaft B, and the other onehalf of the width adjacent to the ends of the drum E is finished, and adapted to form a suitable bearing for the gudgeons E. 1 form the lower box and the upper box alike, so that a firm and reliable bearing is provided, with proper provisions for oiling. (Not represent- .ed.) I have designated the large part of each bearing m and the small part of :each hearing m. The peculiar construction and arrangement in these parts make the bearings of the driving-shaft B entirely independent of the bearings of the drum D. It frequently happens, where machines are worked in this manner, that one hoisting machine lies idle for a long period, sometimes for an entire season, while the shafting which is ready todrive it is actively rotating and giving motionto the others. Now, if, as is usually the case, the driving-shaft B were used for the support of the drum E and its connections, the wear thus induced, being all on one side of the drum E,

would induce serious damage, and, perhaps.

quit; incapacitate the machine for subsequent wor As I have arranged it the wear is entirely independent of the drum E. No contact of the shaft B with the interior of the drum E can occur until the box M is gradually worn Very ordinary care on the part of the engineer in charge is suflieient to guard against the driving'shaft getting so much out of line as to touch and wear upon the interior of the drum E, and even supposing that it does so wear,.the subsequent lining-up of the shaft by introducing new boxes M N remedies the evil entirely, and the fact that the interior of the drum E is worn a little out of true on one side is of no eflect whatever in the subsequent working of the-machine.

The boxes M N support the jack-shaft 0. Both move horizontally within certain limits. The box nearest to the wheel (J is connected by links m to pins 0, mounted eccentrically in the shaft P, which turns in suitable fixed bearings attached to the frame A. By turning this shaft P by aid of the hand-lever P the box N may he moved horizontally. It is thus moved away from the driving-shaft B, carrying with it the jack-shaft O and frictionwheel 0, when it is desired to suspend the hoisting motion, and is moved toward the driving-shaft B, carrying with it the jackshaft so as to press the surfaces of the fric tioz'i-pulley G into contact with the surfaces of the friction-pulley B, whenever it is desired to hoist.

The pins 0 are mounted in such a position on the shaft P, and all the parts are'so adjusted, that the radius of motion of the pins 0 wheel O -is adapted to be adjusted ho'rizontally by means of the screw B. This screw allows the gear-wheels (3 and E to be adjusted with very great delicacy.

' I will now describe. the construction and the peculiar operation of this gear as thus delicately adjusted. e

The teeth of each of the wheels (3 and E- are cast or otherwise producedof the ordinary approved forms for matching accurately together, and transmit the motion smoothly from one wheel to the other. The service which is required of these wheels is peculiarly severe. In the act of hoisting, a rotatory motion is transmitted slowly from the wheel 0 to the wheel E. In the act of holding the weights suspended, the teeth, which are in contact, stand at rest or support the strain in the ordinary manner.

So far the work is not peculiarly severe; but in the act of lowering the load by slackening the strain on the brake D the rope is liable to unwind from the drum E; with very great rapidity, and a motion in the reverse direction of that of winding up or hoisting-is transmitted from the large'gear-wheel E to the small gear-wheel C. The wear in this case is on the opposite faces of the teeth from that experienced in hoisting; and it is very diflicnlt in practice to avoid a disagreeable and dangerous backlash in the gear. This is particularly severe when, after attaining a very high speed, the brake I) is applied with violence and again let off or slackened up suddenly, as is liable to be done. The noise and liability to fracture which would otherwise result from this peculiar service are entirely obviated by my construction and arrangement of these parts. I provide on each of the gear-wheels C E a stout rim on each side of the teeth, which is accurately turned to the pitch-line of the gear. I turn the screw B until the bearings thus provided are pressedfirmly together, so that there is a rolling contact between the surfaces 0 and E on each side of the gear (3 and E. The rims U and E are cast in one with the teeth 0 and E, and perform the double functions of strengthening the teeth and of steadying the motion of the gear. I press the wearing-surfaces in contact firmly, so as to induce a slight resistance to motion, and find that the result is an almost noiseless motion of the gear, both in hoisting and in lowering.

was!

Ihave tested the invention, and find that it greatly reduces the liabilityof the parts to fracture. I wish it distinctly understood that I ascribe this fact not alone to the strengthening of the teeth by their connection at the roots, but also to the steadying of the motion and the prevention of concussive shocks and hammering of the t8 h together by reason of the contact of the rolling-surface.

I aid ,in resisting the strain, urging the boxes M and N apart by means not only of the frame A, but also by peculiarly arranged and constructed binders H. These latter are adapted to perform the double duties of binders and of ties. Strong shoulders h h are provided, which fit over and support corresponding surfaces on the framing A. By mounting the hearings of the shaft P and of the screw R in the ends of these binders, instead of on the framing A, I insure a directness of strain and an absence of spring in all the parts, which is very desirable, and withoutwhich it would be difiicnlt to properly realize the advantages due to the other advantages of my invention.

When the shaft B is short the provision for allowing the friction-pulley B to mo e endwise thereon is of little importance. nt when the shaft B is long, and is employed to give motion to more than one of my hoistingengines, it isliable, from various causes, particularly from the occasional heating of the shaft from friction, to vary the length, and thus to vary the position. of the parts firmly attached thereto, so much so as to cause seri- I ous mischief. My arrangement, in allowing the endmotion, as described, has been successfully tested at the mouth of amine whore heavy loads of rnaterial are lifted by independent hoists at the rate of two hundred and fifty feet per minute by a single continuous-working engine.

By the use of friction-gearing between the I jack-shaft and the drum, and providing for bringing the drum into and out of gear by moving the jackshaft toward and from the drum, I am enabled to put the drum into and out of gear, while the driving sliaft is rotatory at the highest speeds, without any shock, and also with a very small application of manual force, as the weight of the loag'l offers no impediment to the moving of the jaclg'shaft into and out of gear. 3

I ciaimand drum of a hoistingmachine, of a jackshaft interposed between the driving-shaft and drum, and geared with the driving-shaft by V-shaped friction-gearing, and means of moving the saialjack-shaft into gear with and out of gear from the jack-shaft, substantially as and for the purpose herein ,set forth. i

2. The combination, with a hoistingma chine in which the drum is driven by a jackshaft interposed between it and the drivingshaft, of a brake-wheel placed upon the jackshat't, substantially as and for the purpose herein set forth. I

3. In combinationwith the V-shaped friction gear-wheels 'B 0, applied to a hoistingmachine, one of the said gear-wheels fitted to its shaft with a feather, by which it is rendered self-adjustin g to the otherof said wheels, substantially as herein set forth.

4. In combination with the shaft 0 and friction-wheels B O, the movable box M, links m, and eccentric pins 0, mounted relatively to the shaft P and handle 1), so that the pins 0 shall come nearly on their dead-points when the friction-wheels B O are properly connected, as and for the-purposes herein set forth.

5. The combination, with the cog-wheels C and E, by which the jack-shaft and drum of the hoisting-machine are geared directly together, of the bearing-rims (JandE, the peripheries of which are on the pitch-lilies of said wheels, substantially as and for the purpose herein set forth.

6. The combination, with the drum E, surrounding but not touching the driving-shaft,

of the journal-boxes M N, each containing a larger bearing for one of the gudgeons E of the drum, and a smaller bearing for the driving-shaft, substantially as herein described.

7. The binders ll h h, constructed and arranged to serve relatively to the shafts B G and their several connections, so as to support the frame A and aid in preventing any spring or displacement of the parts under the strains and vibrations to which they are subjected,

as herein set forth. I

' GEO. ELBEYNOLDS'.

Witnesses:

HENRY T. Bnown, BENJAMIN W. 1101mm.

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