US1015618A

US1015618A - Hoisting-gearing.

Info

Publication number: US1015618A
Application number: US58693710A
Authority: US
Inventors: Hugh William Fellows
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-10-13
Filing date: 1910-10-13
Publication date: 1912-01-23
Anticipated expiration: 1929-01-23

Description

H. W. PELLOWS.

HOISTING GEARING.

APPLIOATIoN FILED ooT.1a, 1910.

1,015,618. y Patented Jan.23,1912.

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H. W. PBLLoWs.

HOISTING GEARING.

APPLICATION FILED 00T. 1a, 1910* 1,015,618. Patented Jan.23, 1912.

COLUMBIA PLANOGRAFM co., WASHINGTON, LL c.

H. W. FELLOWS.

HOISTING GEARING.

APPLICATION FILED 00T. 1s, 1910.

1,015,618. Panted l111111.23, 1912.

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HUGH WILLIAM FELLOWS, OF LOS ANGELES, CALIFORNIA.

I-IOISTINGr-GEARING.

Specification of Letters Patent.

Patented Jan. 23, 1912.

Application filed October 13, 1910. Serial No. 586,937.

To all whom 'it may concern:

Be it known that I, HUGH IV. FnLLows, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Hoisting-Gearing, of which the following is a specification.

This invention relates to a gearing especially designed for hoists, the gearing being operated with the intermittent grip type of mechanism, but including novel means whereby the driven shaft may be positively driven in either direction at the desired speed and will not operate ahead or faster than the driving instrumentalities. S0 far as I am aware, this type of mechanism has not been employed in hoisting.

lith my construction the load may not only be lifted at any desired speed, but it may also be lowered at any speed desired, the intermittent grip mechanism acting to retard the lowering movement, no brake mechanism being essential for this function. However, a brake may be employed if a greater lowering speed is desired than can be obtained with the hoisting gearing and the final placing of the load at the bottom can be performed by the gearing. As brake mechanism for hoists is well known in the art and as such mechanism forms no part of the present invention, I have not illustrated the same;

lith this mechanism the speed changes are infinite in gradations and are progressive without release or rengagement of driving instrumentalities, so that the load may always be positively controlled when moving either' up or down. In moving the load up or down there may always be one driving band in full operative engagement with the clutch disks, so that perfect and definite speed control of the load is obtained by merely adjusting the speed of the transmission. VJhereas, by controlling the downward movement of a hoist under the old methods, friction between the brake band and drum was the means for regulating the downward movement.

. Referring to the drawings: Figure 1 is a plan view, two of the driving connectionsbetween the driving shaft and driving bands having been omit-ted. Fig. 2 is a section 0n line v2-m2 Fig. 1, only the nearest unit being shown, the two units in the background having been omitted for the sake of clearness. Fig. 3 is a side elevation. Fig. 4 is a section on line ast-m4 Fig. 2. Fig. 5 is a section on line fc5-m5 Fig, 1. Fig. 6 is a section on line .m6-m6 Fig. 3. Fig. 7 is a section on line .mL-x7 Fig. 1. Fig. 8 is an end elevation of what is shown in Fig. 7. Fig. 9 is a side elevation in detail, of a connecting rod.

1 designates the driving shaft, in the present case provided with three cranks 2, and 3 designates the driven shaft on which are rigidly secured three driven disks 4. EX- tending between each crank 2 and a driven disk 4 is a driving unit, the three cranks 2 being at 120O apart, so that there will be a uniform distribution of power to the driven disks 4 and driven shaft 3. As all three units are similar, a description of one will sufiice.

5 designates the frame which is provided with bearings 6 in which is journaled a rock shaft 7 and mounted on the rock shaft 7 is a rock frame consisting of a bail 8 carried by four arms 9 and operated by two links 11 which are connected to two cranks 10 rigidly mounted on shaft 12 which extends through the side wall of the frame 5 and attached thereto is a hand lever 13, as clearly shown in Fig. 3, which may be detachably held in various positions by engaging a dog 14, see Fig. 6, with any one of a series of perforations 15 formed in a bracket 16, the dog 14 extending through an opening 17 in the lever 13 and being connected to a bell crank lever 18 pivoted at 19 to the lever 13, the bell crank lever 18 being operated by a rod 20 which extends through a handle 21 on the lever 13, with a push button 22 extending through the end of the handle and a coil spring 23 within the handle serving to normally hold the rod 20 in an elevated position with the dog 14 in a perforation 15. By pressing down on the push button 22, the dog 14 will be disengaged from the perforation 15 which will permit the lever 13 to be swung in either direction to turn the shaft 12 and adjust the position of the rock frame.

Pivotally supported on the shaft 8 of the rock frame are three radius arms, each in the present case comprising a strap 24 with upturned ends 25 carrying bearing blocks 26 in each end with two tie rods 27 connecting the upturned ends 25 and confining the bearing blocks 26. A detail of the radius rod is shown in Fig. 9.

Operated by each crank 2 is a pitman 28,

which at its crank end is connected with the crank pin 2 and at its other end is connected to a pin 29 in the lower end of a ratchet arm 30 pivoted to a pin 3l which extends through the block 26 of the radius arm 27, there being two ratchetarms 30 in xach unit, one being arranged on each side of the radius arm. The upper end of each ratchet arm 30 is pivoted to a pin 32, clearly shown in Fig. 5, which is detachably secured in a head 33 formed on one member L34 of a ratchet band, the other member of which is pivoted at to the member 34 and the two members and substantially encircle the disk 4. rlhe pin 82 is retained by a'block 3T held by a cap screw 38. 'The other member 35 carries a head 39 and a post 40 projects from the head through the head 39 with a` coil spring 4l retained on the post 40 and serving to normally con tract the ratchet band by bringing the ends of the two

members

34 and 35 together. The ratchet band, however, may be held open by means of a finger 42 pivoted at 48 to the head 39 and having a detent 44 adapted to stand against a projection 45 on the head The linger is controlled by a roller 46 carried by an arm 4T which projects from shaft 48, the latter being adjiiisted by a lever 49. A spring 50 located between the linger 42 and ratchet hand member 35 serves to hold the finger yieldingly upward against the roller 46 and the linger is curved substantially concentric with the disk 4. The pin 36 of the

ratchet band members

34 and 35 is supported by an arm 51 swung on the shaft lV hen the arm 47 is adjusted to depress the linger 42, as shown in Fig. 5, the detent 44 will lie in front of the projection 45 and will hold the two members 84 and 35 apart, preventing them from coming together during their oscillation in either direction, as during such time the concentric linger 42 rides under the stationary roller 4b, but is prevented from disengaging from the projection 45 and thus holds the members 34 and 85 apart, thereby permitting their free oscillation without imparting any movement to the disks 4 and obviously when so adjusted the disks 4 and shaft are capable of movement independently of the hoisting mechanism. I have also provided further mechanism whereby the ratchet members 84 and 35 may be caused to close and grip the disk 4 as they move in either direction when oscillated and to release the disk 4 when moving in the opposite direction. This I accomplish as follows: A hood 52 is secured to the head 39 and is formed with two circular cavities 53 which receive rounded ends 54 of shift bars the lower ends of the shift bars 55 having rounded ends which fit in circular cavities 56 formed in a controlling lever 57 U-shaped in cross section and pivoted at 58 to the ptman 28 and shown in detail in F ig. 7 The controlling lever 57 has a rearwardly extending arm 59 carrying two rollers GO, see Fig. 8, which operate on two cams 6l rigid on the crank pin 2. The cams ($1 both operate simultaneously and may be considered as a single cam and each cam Gl embraces half a circle and operates to tilt the controlling lever 57 in a direction to move its roller 60 away from the crank pin during each half revolution and thereby move the associated shift bars 55 rearwardly, thereby pressing back the hood 52, compressing spring 41 and separating the members 34 and 85, so that during such haltl of a revolution the ratchet band operates freely over the disk 4; while, during the other half revolution of the c ank, the cams (3l permit the roller GO to move inwardly, thereby allowing the controlling lever to swing in the opposite direction and retract the shift bars 55, the latter being moved back by hood 52 impelled by spring 4l, so that during this half of a revolution the ratchet band members will grip the disk 4 and operate the same. It is obvious that the operative engagement of the ratchet hands with the disk 4 occurs during one-half of a revolution with the crank shaft l operating in either direction. rl`hus, referring to Fig. 2, if the crank shaft l be driven in a clockwise direction, the cams Gl will open the ratchet bands during the downward stroke of the ratchet'arms 30 and will relax them during the upward stroke thereof; while, if the shaft l be driven in a counterclockwise direction., the ratchet band will be caused to grip the disk 4 during the upward movement of the ratchet arm 30. rlhus, as there are three driving units, there is always one ratchet band in positive engagen'ient with its disk 4 and obviously the shaft 3 will be positively driven in either direction at an angular speed corresponding to the adjustment of the transmitting mechanism, which adjustment is performed by varying the position of the rock frame. Thus when the rock frame is in the position shown, a very short stroke will be imparted to the driven shaft 3; while, if it be adjusted into the position shown in dotted lines Fig. 2, a greater arc of oscillation will be performed by the ratchet bands and the shaft 3 will be driven at a correspondingly faster speed. It will be noted that the load which is being hoisted will not only be positively lifted by the transmission mechanism at a speed determined by the adjustment of the mechanism, but that when theshaft l is reversed in its direction of rotation to lower the load, 'that the transmission mechanism will still continue to operate the driven shaft 3 at an angular speed in exact relation to the arc of oscillation taken by the ratchet bands and therefore the load when lowered can move no faster than the transmission mechanism operates.

If it be desired to drop the load more quickly than could be accomplished by the transmission mechanism, the handlever 49 may be adjusted to depress the arms 47, so that they will tilt the fingers 42 and move their detents 44 infront of the projection 45 and release the ratchet bands from their disks. As shown in Fig. 5, the three arms 47 are arranged on the shaft 4S at dierent ang'les, the purpose of which is to cause the fingers 42 to be depressed serially. If all of them Were to be depressed simultaneously, there would be some of them lying under the projection 45 if they Were to be de pressed during that part of the stroke in which the ratchet band members are contracted and this Would obviously break them, as those detents 44 which were under the projection 45 Would be prevented from rising.

That I claim is rl. A driving shaft operable in either direction, a driven shaft, intermittent grip devices on the driven shaft, means operated by the driving shaft for oscillating said intermittent grip devices, and means operated by the driving shaft in rotating in one direction for causing said intermittent grip devices to engage in rigid relation to the driven shaft in moving through one direction of oscillation and when the driving shaft rotates in the other direction for causing the intermittent grip devices to engage in rigid 'relation to the driven shaft in moving through their other direction.

2. A driving shaft operable in either direction, a driven shaft, intermittent grip devices on the driven shaft, means operated by the driving shaft for oscillating said intermittent grip devices, and means operated by the driving shaft in turning in one direction to cause the intermittent grip devices to be placed in rigid relation With the driven shaft during their forward stroke and to move freely from the driven shaft when oscillated in their backward stroke, and when the driving shaft rotates in the oppo site direction to place the intermittent grip devices in rigid relation to the driven shaft during their backward stroke and in free relation to the driven shaft during their forward stroke.

A driving shaft operable in either direction, a driven shaft, intermittent grip devices on the driven shaft, means operated by the driving shaft for oscillating said intermittent grip devices, means for causing said intermittent grip devices to engage in rigid relation to the driven shaft in moving through either direction of oscillation according to the direction of rotation of the driving shaft and to move freely from the driven shaft in the other direction of oscillation, and means for placing the intermittent grip devices in free relation to the driven shaft during their stroke in bot-h directions.

4. A driving shaft, a driven shaft, intermittent grip devices on the driven shaft, an adjustable rock frame, radius arms pivoted to the rock frame, ratchet arms pivoted to the radius arms, each ratchet arm connected to an intermittent grip device, pitmen connected to the driving shaft and pivotally connected to the ratchet arms, and means operated by the driving shaft in turning in one direction to cause the intermittent grip devices to be placed in rigid relation With the driven shaft during their forward stroke and to move freely from the driven shaft when oscillated in their backward stroke, and when the driving shaft rotates in the opposite direction to place the intermittent grip devices in rigid relation to the driven shaft during their backward stroke and in free relation to the driven shaft during their forward stroke.

A driving shaft, a driven shaft, intermittent grip devices on the driven shaft, an adjustable rock frame, radius arms pivoted to the rock frame, ratchet arms pivoted to t-he radius arms, each ratchet arm connected to an intermittent grip device, pitmen connected to the driving shaft and pivotally connected to the ratchet arms, a controlling lever pivoted to each pitinan, a cam operated by the driving shaft for actuating each controlling lever, a shift bar associated With each ratchet arm and connected to each associated controlling lever, and means operated by the respective shift bars for placing the, associated intermittent grip devices in rigid or free relation to the driven shaft according to the direction of rotation of the driving shaft and angular position of the cams thereon.

6. A driving shaft, a driven shaft, intermittent grip devices on the driven shaft, means operated by the driving shaft for oscillating the intermittent grip devices, each intermittent grip device comprising a disk, a ratchet band encircling the disk, cams on the crank pins of the driving shaft, and means operated by said cams for eX- panding and contracting the ratchet bands according to the direction of rotation of said cams and their angular position.`

A driving shaft, a driven shaft, inten mittent grip devices on the driven shaft, means operated by the driving shaft for oscillating the intermittent grip devices, each intermittent grip device comprising a disk, a ratchet band encircling the disk, cams on the crank pins of the driving shaft, means operated by said cams for expanding and contracting the ratchet bands according to the direction of rotation of said cams and their angular position, and manually operated means for holding said ratchet bands expanded during their oscillation in both directions.

S. A driving shaft, a driven sha-ft, intermittent grip devices on the driven shaft, means operated by the driving shaft for oscillating the intermittent grip devices, each intermittent grip device comprising a disk, a ratchet band encircling the disk, cams on the crank pins of the driving shaft, means operated by said cams for expanding and contracting the ratchet bands accordingl to the direction of rotation of said cams and their angular position, and manually operated means for serially engaging with and holding the ratchet bands expanded during their oscillation in both directions.

9. driving shaft, a driven shaft, disks on the driven shaft, expansible ratchet bands on the disks, spring means for tending to expand the ratchet bands, a curved finger' pivoted to one member of each ratchet band, the other member of the ratchet band having a projection against which the end of said finger is adapted to abut, connections from the driving shaft to each ratchet band for oscillating the ratchet band, a shaft, a hand lever thereon, an arm on the shaft, and a roller 0n the arm adapted t0 be moved against the curved finger and shift it.

l0. A driving shaft, a driven shaft, disks on the driven shaft, ratchet bands on the respective disks, each ratchet band comprising two semi-circular members pivoted together, an arm ournaled on the driven shaft supporting the pivot of the members of each ratchet band, a head on one member of the ratchet band, connections from said head to the driving shaft for oscillating the ratchet band, a post projecting from said head., a projection on said head, a head on the other ratchet band member through which said post extends, a nut on the post, a spring between the nut and the latter head, and means adapted to be moved against said projection to prevent the ratchet band members from closing on the associated disk.

ll. A driving shaft, a driven shaft, disks on the driven shaft, ratchet bands on the respective disks, each ratchet band compris` ing two semi-circular members pivoted together, an arm journaled on the driven shaft supporting the pivot of the members of each ratchet band, a head on one member of the ratchet band, connections from said head to lthe driving shaft for oscillating the ratchet band, a post projecting from said head, a projection on said head, a head on the other ratchet band member through which said post extends, a nut on the post, a spring between the nut and the latter head, a curved finger pivoted to the latter head and having a detent adapted to engage said projection, a shaft, means for adjusting the shaft,and a series of levers on said shaft' in different angular positions for engaging against the respective curved fingers and tilting the curved fingers serially.

l2. A driving shaft, a driven shaft, disks on the driven shaft, ratchet bands on the respective disks, each ratchet band comprising two semi-circular members pivoted together, an arm j ournaled on the driven shaft supporting the pivot of the members of each ratchet band, a head on one member of the ratchet band, connections from said head to the driving shaft for oscillating the ratchet band, a post projecting from said head, a projection on said head, a head on the other ratchet band member through which said post extends, a nut on the post, a spring between the nut and the latter head, means adapted to be moved against said projection to prevent the ratchet band members from closing on the associated disk, a hood connected to the latter head,

said hood having circular recesses, the driv-l ing connections between the driving shaft and driven shaft comprising pitmen connected to the driving sha-ft. ratchet arms operated by the pitmen and connected to the first named heads, radius arms carrying the ratchet arms, a rock frame pivotalljT supporting the `radius arms, shift bars having rounded ends engaging the rounded seats in the hoods, controlling levers pivoted to the respective pitmen, said controlling levers having rounded seats engaging the other ends of the shift bars, and cams en t-he crank pins of the driving shaft operating against the ends of said controlling levers.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this ath day of Gctober 1910.

HUGH VLLIAM FELLOW'S.

In presence of- GEORGE T. HAoKLnY, P. H. SI-IELTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C.