US2531022A - Cableway hoist - Google Patents

Description

Wm]... 21, NW N. s. BATEMAN EI'AL 253mm CABLEWAY HOIST Filed May 5, 1947 2 Sheets-Sheet l INVE NTORS N.S. BATEMAN MP. W! E SSLAE N BY a/ w ATTORNEYS.

s. BATEMAN ET AL 2,531,022

CABLEWAY HOIST Nov. 21, 1950 Filed May 5 1947 2 Sheets-Sheet 2 ATTORNEYS- Patented Nov. 21, 1950 UNITED STATES ATE OFFICE QABLEW 9 5? Norman S. Bateman and Maurice F. Missiaen,

Toronto, Ontario, Canada, assignors to Construction Improvements Limited, Toronto, On tario, Canada, a company of Canada" Application May 5, 1947, Serial No. 746,012 7 Qlaims. (Cl. 254-185) The invention relates to improvements in cableway hoists as described in the present specification and shown in the accompanying drawings that form a part of the same.

The invention relates particularly to means for actuating a cableway carrier in such a way that two or more essential motions (traversing and hoisting, or traversing, lowering and bucket opening) can be performed simultaneously and at speeds entirely independent of one another.

One of the main objects of the invention is to provide a power unit actuating the various engine drums in ynchronism and so arranged that they may simultaneously or independently be operated in either direction at variable synchronised speeds, whereby loads controlled by the fall ropes operated by the fall rope drums of the carrier may be raised, or lowered, simultaneously or in: dependently at like or difierent speeds, either while the carrier is stationary or while it is being traversed in either direction.

Another object of the invention is to provide power transmission means which can be applied to any carrier which is designed to perform some other duty (mostly hoisting) besides common traversing, in which case two or more lines are re;- quired to control these motions, and at leastone of the motions is produced by difference in speed between traversing and hoisting lines, or in other words, by their relative velocity.

A further object of the invention is to provide cableway actuating means particularly adapted to the operation of the lighter carriers, not re,- quiring the maximum of power, and where cost of construction and maintenance is an important factor.

W h the ab ve a th r obieq s in vie the invention consists in the novel ieatures of construction, arrangements and combinations of pa t described in t e esen e cetiqn and m r P cul r nt ou n the ela m novelty following. Y

in de cr n th n i n f renc l he made to the accompanying drawings, in vvrhic lq v Fi u e s a n v e of 9. em ed a 9 our ca wa hoist, a pu p? 9 the seemin base being brokenaway.

Figure 2 is a vertical sectional view talren onthe line 2,-2 of Figure 1,

F ur 3 i a e d v ti n q i he-ri hts Figure F ure 4 is a ca ectional vi w take -Q th in s-4 o Fi ur 4 Fi re 5 is a e tio th ou h the suppor ing 116154? @KQB Qllllhg 111 B :.5- Q 'F. l-l ,93 .12?

in elevation the traversing drum clutch and the means to move same.

Fi u e 6 is a cross se i nal vi w take th line 6 6 of Figure 1,

Figure 7 is a cross sectional view taken on the line l 'l of Fi u e 1.

Like numerals of reference indicate corresponding parts in the various figures.

rri to the raw s i whi h th inv tion is shown in one of its possible applications, namely, to the carrier which may be traversed e a forth c s a cab ewe a b mea s of an endless traversing line and having two fall ope drums ac u te b tw ehd es n mi iq es a a ed to tran m t pow rom engine drums to the mechanism of the carrier.

A, B and C a e dr s a r n n a ed endw e gnmen and mo t r ti a common shaft I, which extends through the centres of the end walls of the respective drums and is suitably supported in bracket 2, which latter are in turn re erably mounted on a plat,- form 3.

T e tf 3 s r erab y s pb rte b a sub-base 4 from which it is spaced by suitable members 5. x

The drums A and B are each provided with a circumferential raised sheave par-t vti locatedequidistant from the opposite ends'of the drum and provided with circumferential rope, 'or cable, roove The drum C is provided with a circumferential ed hea e p t n ,5 p n i g i d ameter to the sheaves 6 carried by the drums A and B and having similar rope grooves therein, but this sheave portion 8 is preferably located at one end of the drum.

It will thus be seen that as the outsidedrums A and B have their sheave portions 5 locatedequidistant from their ends there will be provided, by the annular walls of said drums, on each'of said drums annular bands .9 of like width at opposite sides of the respective sheave portions, and that as the sheave portion ,8 of the centre drum C is located at one end of its drum there will be provided on such drum an annular portion, or band, Hi located at one side only of the sheave portion-t3.

The sheave portions of the drums A, B and p are adapted to accommodate endless lines D, l; and F respectively and each said drums has located in advance thereof a circumferentially grooved idler sheave I over which the lines from t orr po n rm ar s e andned to the drumsany desired number of times before pas n t th ya er- As the construction and operation of the cable'- way carrier does not constitute a feature of the present invention it is not shown in the drawings, but it is to be understood that the lines or ropes D and E extending around the outer drums A and B respectively may constitute the endless transmission lines by means of which power is transmitted to the carrier drums which control the usual fall ropes and permit of the manipulation thereof to raise or lower the load, or to open or close a bucket, or to perform any other predetermined function, and that the line F operatively engaging the centre drum C may constitute the means employed to traverse the carrier along its trackway. It is further understood that such lines may be reeved from hoist to head tower, to carrier, to tail tower, and returned to the respective drums as is usual in cableway construction.

The drums A and 13 each carry two fixed gears,

the drum A carrying the gears I I and I2 and the drum 13 carrying the gears Ila and I211. The gears II and Ila are fixed to the one corresponding ends of the respective drums and are of like diameter, and the gears I2 and I2a are fixed to the other corresponding ends of the respective drums and are of like diameter to one another but differ in diameter to th gears II and Na, the ratio between the gears II-IIa and I2a preferably being such that when a drum is being driven by its gear I2, or IZa, it will be rotated at approximately one-half the speed as when it would be rotated by rotation of its gear II, or Ila; It is to be understood however, that this ratio is not arbitrary and that any desired ratio may be employed.

The drum C is provided with a single gear I3 fixed to the end of the portion ID of said drum, and preferably being of the same diameter as the gears 52 and I2a.

It will thus be apparent that the drum C, which may be termed the traversing drum has but a single speed while the drums A and B, which may be termed the transmission drums, have two speeds.

It is a tubular shaft which extends parallel with the shaft I carrying the drums A, B and C and extends beyond said drums at each of its ends and is spaced from the gears carried by aid drums. This shaft, which may be termed the main shaft, is journaled at intervals throughout its length in supports I5 securely fastened to the platform 3 and extending upwardly therefrom.

The shaft I 4, in order that the full scope of the invention may be realized, must be capable of rotation in either direction and while this is readily accomplished where a reversible motor is employed, there ar instances, such as where a non-reversible motor or engine is employed that reversing means must be interposed between the engine and the shaft for effecting the change in direction of the main shaft at will.

It will be appreciated that in determining the 4 set up, and which generally is particularly adapted to the lighter jobs where economy is an important factor, the means thought most likely to accomplish such aims is shown in the present exemplification of the invention.

I6 indicates an engine provided with a shaft II carrying the bevel gear I8 through which appropriate connections with the shaft I4 are operated.

A tubular shaft I9 suitably journaled in brackets 20 is positioned at right angles to the engine shaft I! in the same direction as the main shaft I4 but spaced from said shaft and having its one end overlapping the corresponding end of said main shaft.

The shafts I4 and I9 are operatively connected by means of a sprocket chain 2I operating over sprockets 22 and 23 carried by the overlapping ends of said shafts.

A conventional clutch mechanism is employed to peratively connect the shaft I9 with the bevel gear I8 to provide selective rotation of said shaft I9 in either direction.

As the clutch mechanism is of conventional type it is not thought necessary to show in the drawings the interior operating parts but simply' necessary to designate the exterior parts, such as the housing 24 which is carried on the shaft I9, the parallel bevel gears 25 and 26 normally rotatable on said housing and in constant engagement with the bevel gear I8 whereby on the rotation of the engine shaft they will be in constant free rotation in opposite directions, and the slidable clutch operating rod 21 by means of which the clutch mechanism is operated to provide the operating connection between the shaft I9 and the desired gear 25 or 26 according to the direction the shaft is to be rotated.

The rod 21, which slides within the shaft I 9, carries on its end which protrudes from the said shaft, a circumferentially grooved collar 28 adapted to receive between the walls of its groove the bifurcate ends 23 of an angularly related lever 30, which latter is pivoted intermediate of its length to a suitabl bracket, as at 3I, and at its outer end has pivotal connection with an operating rod 32 which extends to a point readily accessible to the operator of the hoist. At such point as is designated as the operators position the rod 32 has pivotal connection with a suitable hand lever 33, through the manipulation of which the rod 21 is operated to cause the clutch mech anism to operatively connect the shaft I 9 and the desired gear 25 or 26, and thus effect the rotation of th shaft I9 in the desired direction.

Mounted on the main shaft I4 and normally freely rotatable thereon are a plurality of gears 34, 35, 36, 31 and 38 meshing respectively with the gears II, I2, IIa, I20. and I3. It will thus be seen that it is possible for the shaft I4 to be rotated in either direction without causing rotation of any of the gears 34, 35, 36, 37 or 38 and consequently without causing rotation of any of the drums A, B or C.

The gears controlling the rotation of the respective drums A and B, that is, the gears 34 and 35 which mesh with the gears II and I2 respectively of the drum A, and the gears 36 and 31 which mesh with the gears Na and I2a of the drum B, are adapted to be brought into selective operating engagement with the main shaft I 4, whereby said drums may be operated at like speeds when the gears 34 and 36 are engaged with said main shaft, or, when the gears 35 and 37 are I operatively connected with said main shaft and the gearsf34 and 36 free thereon, or may be ro'- tated at different speeds when either of the gears 34 or of the drum A isoperatively connected to the main shaft while the gear 36, or 31; mesh ing withthe gear of the drum B which is of a size different to that to which the gear 34 or 35 operatively connected to the main shaft is in mesh.

The means for selectively bringing into operative engagement with the main shaftany of the gears 34, 35, 36 and 31 or different combinations the main shaft between the gears 54 and 35 andis movable along said shaft into selective operative engagement with either of said gears 34 or 35, and the other of which clutch members is mounted on the main shaft between the gears 35 and 3'! and is movable along said shaft into selective engagement with either of said gears 35 or 31 for operatively connecting the desired gear or gears to the main shaft.

The respective clutch members 39 and 40 are moved along the shaft I4 in either direction by means of rods 4| and 42 respectively, slidable within the main shaft l4 and projecting from the corresponding ends of the latter for accessibility in the manipulation thereof.

The clutch rods 4! and 42 are provided with circumferentially grooved. collars 43 and 44 respectively.

Lever arms 45 and 45 pivoted intermediate of their ends in brackets 4'! and 48 respectively positioned at opposite endsof the hoist and having bifurcate ends 45 and 50' operatively connected with the respective collars 43 and 44 within the grooves in the latter, provide means for moving the clutch rods 41 and 42 lengthwise of the shaft M to move the respective clutch member into either of the operative positions, or to neutral positions on saidshaft.

As the clutch mechanism used herein is of conventional construction and is easily procurable and the operation thereof well known it has not been thought necessary to show such construction in detail in the drawings.

Rods 5| and 52 are pivotally connected at their one ends to the outer ends of the lever arms 45 and 46 respectively and extend to points near the hand lever 33 and therefore readily accessible to the operator of the hoist, and are pivotally connected to pivoted hand levers 53 and 54 respectively.

55 is a clutch member individual to the gear 3B and being movable along the shaft [4 into and out of operative engagement with said gear, whereby said gear may be rotated either alone or coincidently-with one, or both, of the drums A and B, while either or both of said drums are being rotated at either of their possible speeds.

55 is a collar connected to the clutch 55 at the side of the clutch farthest removed from the gear 38 and having a circumferential groove 51 therein.

58 is a lever by means of which the clutch 55 is moved along the shaft l4 towards and away from the gear .38.. This lever 58 is arranged vertically and :is pivoted intermediate of its length in a bracket 59 :carried. by an upright .64, whereby c it will swing-in a direction along the longitudinal axis of the main shaft I4.

The lever has a bifurcate upper end adapt: ed to span the collar 56 and has the arms of such bifurcate portion provided with lateral fingers 6! adapted to loosely enter the groove 51 in the said collar for the purpose of moving the clutch under the movement of said lever.

62 and 63 are toggle arms positioned slightly above and parallel with the platform 3 and having their corresponding ends pivoted together, as at 64, the arm 62 at its outer end being pivotally anchored in a bracket 65 rising from the platform 3, and the arm 63 having pivotal connection at its outer end with the lower end of the vertical clutch control lever 58.

The toggle arms 62 and 53 are each of such length that when the clutch operating arm or lever 58 is in its true vertical position and the another and thus cause the arm 63 to force the lower end of the lever arm 58 in a direction opposite to the direction of movement required of the clutch. I

A plate 66 adapted for swinging movement on a horizontal plane is fulcrumed on a pin 61 extending upwardly from the platform 3 at a point beyond the pivotal connection between the toggle arms 62 and 53 at the side on which the arm 63 is located and said plate has connection at a point considerably removed from its fulcrum point, with the said toggle arms by means of the link 68 which provides the pivotal connection between said arms and which is extended in a 'direction substantially at right angles to the main shaft I4.

It will be seen that when the plate 65 is swung on its pivot pin it will cause the toggle arms to move towards an open, or endwise related positions, and thus move the clutch 55 into position to operatively connect the gear 38 with the main shaft, or, it will cause the clutch to be moved in the direction to break the connection between the said gear and the main shaft, according to the direction in which said plate is swung.

A rod 59 is pivoted at its one end to the plate 65 at a point removed from the fulcrum point of said plate and on a line substantially at right angles to a line drawn between the pin 61 and the point of connection between the link 68 and said plate. Said rod 69 extends endwise of the hoist and is pivoted to an upwardly extending hand lever 10 located in proximity to the levers 33, 53, and 54 so that all of said hand levers lie within easy reach of the operator.

.A coil spring "H anchored at its one end to a bracket 12 secured to the platform 3 at the side of the plate 55 opposed to that from which the rod 69 extends, and at its other end being pivotally connected to the plate 66 or to said rod -69 at its point of connection with said plate, exerts a continual pull on said plate to normally hold the toggle arms 62 and '53 away from a straight line relationship, as shown in Figure 1, so as to hold the clutch to its :neutral position.

From' the foregoing description it will have been apparent that the shaft l4 may be rotated in either direction and that the direction of movement is governed by the relationship of the clutch mechanisms and the respective gears 25 and 26, which is selective through the medium of the pivoted clutch lever 30, the rod 32 and the hand lever 33.

It is also obvious that as each of the drums A, B and C has its own clutch mechanism said drums may be brought into rotation either simultaneously or independently and at like or different speeds relative to one another, in a direction opposite to that in which the main shaft is rotated, simpl by manipulating the proper hand lever 18, 54 or 53, or all of them, according to requirements.

According to the description given thus far of the hoist disengagement of the main shaft from operative engagement with any gear 34, 35, 36, 3! and 38 will simply release the driving power through the particular gear to its drum but will not cause immediate cessation of movement of said drum, which without the employment of braking means would continue to rotate under the load until the force of momentum has been spent. Under certain circumstances in the control of the lines of a cableway carrier this continuance of rotation of a drum under momentum onl may be found advantageous but it is imperative that means be provided for braking each drum individually and at the exact desired instant whether it be coincident with the release of driving power to the drum or at a given time during rotation of the drum due to momentum.

The drums A, B and C are provided with brake bands l3, l4 and I5 respectively surrounding the said drums at corresponding sides of the sheave portions thereof. Each brake band is provided at its ends, located on the under sides of the drums, with laterally extending parallel slotted lugs 16 and 1? adapted when drawn towards one another to cause the band to close on the drum and hold it from turning.

Each brake band is provided with a tightening rod, or link, 18 which is pivoted at its one end to the lug 16 (which is farthest from the main shaft l4) and extends across the lug I1 and has pivoted thereto at a point beyond said lug 11 a downwardly extending lever 79 shaped to provide a cam portion 88 extending inwardly into engagement with the corresponding side of said lug TI and adapted, when the said lever is swung on its pivot by a pull on the lower end of said lever in a direction towards the main shaft l4, to be moved into position to exert pressure to force the lugs 16 and H towards one another and thus close the brake band over the drum.

A spiral spring Si is provided for each brake band and each said spring is anchored at its one end in a suitable bracket 82 positioned at the side of the drum farthest from th main shaft, and

at its other end has suitable connection with the lower end of the associated cam lever 18 whereby a yielding pull is continually exerted on the lower end of each said cam lever to hold the cam normally inoperative in respect to its brake band.

The cam lever 19 which controls the brake band employed to brake the centre, or traversing line, drum C is connected with one or the other of the arms 62 or 83 near the point of connection between the latter arms, by means of a rod 83 (shown in Figure 6) whereby manipulation of the hand lever 19 and consequent movement of the meeting ends of said arms in a direction towards the main shaft to bring the clutch 55 into operation to cause rotation of the drum C, will push the lower end of the cam lever towards the brake band lug 11 and thus relax the brake, and movement of the said arms in the opposite direction to disengage the clutch will automatically cause a pull on the rod 83 and thereby move the cam into operative position to cause the brake band to grip the drum C and stop it from rotating.

The cam lever 19 which causes the brake band 13 to be moved to its operative position in respect to the transmission line drum A has a rod 84 connected to its lower end and extending towards and beyond the main shaft in an upward incline.

A rod 85 extends from a point in proximity to the various hereinbefore described hand levers 33, 53, 54 and 18 (which are congregated within an area accessible to the operator) to a point adjacent to the outer end of the rod 84 and has its corresponding end bent at right angles in an upward incline to form a crank portion 86 which is pivotally connected at its end to the end of the rod 84 whereby when the rod 85 is rotated the rod 84 will be moved longitudinally in one direction or the other according to the direction of rotation of the rod 85.

The rod 85 throughout the greater portion of its length extends loosely through a tubular member 81, which latter at its outer end extends loosely through and is partially supported by, an upright bracket 88.

The rod 85 extends outwardly beyond the outer end of the tube 8'! and the supporting bracket 88 and is provided with a lateral crank portion 89 extending in a direction substantially opposed to the crank portion 86 whereby up or down movement of the outer end of the crank portion 69 will cause the crank portion 86 to be swung in an arc to move the rod 84 lengthwise in the direction predetermined by the direction of movement of the crank portion 89.

A vertical lever 90 pivoted at its top end to the crank end 89 of the rod 85 and extending through a suitable bracket 9| and at its lower end having a suitable foot engaging part 92, provides means whereby the operator can bring the brake 13 into operative engagement with the drum A to check, or stop, the rotation of said drum at will, upon the release of power to said drum.

A brake rod 93 extends outwardly from the lower end of the cam lever '?9 which controls the operation of the brake band 14 on the drum B.

The brake rod 93 has pivotal connection at its outer end with a plate or bracket 94 which is rigidly fastened to the tubular member 81 and extends downwardly therefrom, whereby on the rotation of the tubular member 81 lengthwise movement will be imparted to the brake rod 93.

The tubular member 81 has a lateral crank portion 95 which is pivoted at its outer end to the top end of a vertical rod 96 which projects loosely through a bracket 91 and has its lower end provided with a foot engaging part 98 whereby downward pressure of the foot Of the operator will cause the tubular member 81 to be rotated in a direction to cause a pull on the brake rod 93 to pivot the lever 19 and bring the cam into operative position to brake the drum B.

Each of the brake bands has an upwardly extending fixed block 99 terminating in a central tongue IEO extending in a direction transversely of the band and adapted to fit within a corresponding groove in the under face of a keeper bar IBI, which latter common to all of the brakes and extends across the hoist and is suitably secured in any desired manner, as by means of arms I02 extendin downwardl and suitably drum C controls the line employed to traverse a cableway carrier along a trackway and that the drum A controls the line employed to effect the opening and closing of a bucket, and that the drum B controls the hoisting line of the carrier.

Assuming further that the drum C is to be rotated to first move the carrier towards it (in other words towards the head tower) and that thebucket is also to be lowered and opened for filling, and then closed and raised and the car- ;rier moved in a direction towards the tail tower for dumping purposes, where the bucket is lowered and opened and then raised and returned with the carrier for a new load.

With the engine in operation the first requirement is that the main shaft be set in rotation in the required direction to cause the drum C to be-rotated in the direction to cause the line F to be'pul-led in -'towards the under side of the drum (the lower turn of the line being the one usually operatively' engaging the carrier). This is accomplished-by pivoting the hand lever 33 in the desired direction that through the medium of the rod 32, the pivoted lever 35, the collar 28 and the clutch rod, 21 the clutch 24 will be moved in the direction to cause it to bring the required gear 25 or25- into engagement with the shaft l9, which latter -:throughits chain connection with the main Shaft will cause said main shaft to be rotated in the proper direction.

The hand lever is then operated to cause, through the rod 39, a pullon the plateiiB, which results in .the said plate being pivoted to thus exert a push on the link 68, which in turn forces the links or arms and 63 towards a straight line relationship with two resultant accomplishments, the one being theswinging of the vertical arm 58 on its pivot to move the clutch 55 to cause operative connection bet-ween the gear 38 and the main shaft, and the other being to exert a push on the brake rod 83, causing the lever 13 to swing on its pivot to release the pressure of the cam against the lug Ti and thus insure release of the brake band 15.

It will now have been apparent that the operative connections between the main shaft and the gear 38 will cause rotation of the drum C through the-meshing gears 38 and I3.

At any desired time during the rotation of the ,drumgc to bring the carrier to. the desired point the drum B may be brought into motion to cause thecarrierto be lowered and if desired the drum A may also be set in motion, to cause the opening of the bucket in readiness to accept the load.

The drum B is set in rotation through the medium of the hand lever 54 which pivots the arm 46 and thus moves the clutch rod 42 to cause the clutch M! to be moved to bring either the gear 36, or the gear 37, into operative engagement with the main shaft, according to the rate of speed at which it is desired to rotate the said drum.

The drum A is set in motion at one or other of its two speeds through the medium of the hand lever 53, the rod iii, the lever 45, the clutch rod 4| and the clutch 33. which latter causes the id operative connection of the main shaft and the gear 34 or 35 accordin to the rotative speed required of the said drum.

To stop the traversing line drum C, as for instance when the carrier has reached the desired terminus, it is simply necessary to swing the plate 53 on its pivot, by means of the hand lever l3, thus causing a pull on the arms 62 and 63 at the point of connection with one another, thereby swinging the vertical rod 55 on its pivot to move the clutch 55 to disconnect the gear 33 from the main shaft and also causing a pull on the brake rod 83, which through the lever 19 brings the cam into operation to cause the brake band to grip the periphery of the drum and stop same from rotating.

The gears 34, 35, 33 or 31, according to which has, or have, been previously in operation, may be disengaged from the main shaft at any desired point in the operation of the device by the manipulation of the hand levers 53 and 5d, and the drums A and B, or either one, allowed to rotate temporarily under momentum, or they may be stopped from rotation coincidently with the release of power to the gears carried by the main shaft, by application of the respective brakes, which is accomplished in the case of the brake 13 of the drum A by the manipulation of the foot lever 32 operating the rod connected to the brake rod 83, and in the case of the brake M of the drum B by the manipulation of the foot lever 98 which operates the tubular crank member 81 connected to the brake rod 93.

The reversal of direction of rotation of the main shaft whereby the various drums may be moved to permit movement of the carrier along its trackway, and the closing of the bucket, and the raising of the load, is accomplished by manipulating the hand lever 33 to bring the clutch '24 to effect engagement between the shaft 19 and the other of the gears 24 or 25 as the case may be.

The drum 0 may now be caused to rotate in the opposite direction, to move the carrier outwardly, by simply operating the hand lever it to cause pivoted movement of the plate 65, and consequently through the cooperation of the arms 32 and 53 and the vertical lever 58, the movement of the clutch member 55 to re-connect the main shaft with the gear 38 meshing with the drum gear i5.

The drums A and B may be caused to rotate independently or simultaneously and at either of their speeds and while the. drum C is either stationary or in rotation by simply operating the proper hand levers 53 and 54 to bring the proper gears 34, '35, as or 31 into operative engagement with the main shaft. Either drum may be braked at will by the use of the appropriate foot lever 92 or as, which through the various connections controls the operation of the brakes E3 and i l.

While we have illustrated and described the present preferred form of construction for carrying out our invention, this is capable of variation and. modification without departing from the spirit of the invention. We, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail ourselves of such variations and modifications as come within the scope of the appended claims.

What we claim is:

1. A cableway hoist including a traversing line drum and two transmission line drums mounted for independent rotation, a shaft, a prime mover .fOZ rot ting said shaft in either direction, said traversing line drum having a fixed peripheral gear and said transmission line drums each having two fixed peripheral gears spaced from one another, the corresponding end gears of said transmission line drums preferably bein of like diameter and the other corresponding end gears of said transmission line drums being of like diameter to one another but differing in diameter from those of the first mentioned corresponding end gears, whereby each said transmission line drums has two speeds, gears on said shaft individual to said fixed drum gears and meshing therewith but being unconnected to said shaft normally, a clutch movable along said shaft individual to the shaft gear meshing with the fixed gear of said traversing line drum, means for moving said clutch along said shaft into and out of engagement with said shaft gear, a clutch movable on said shaft between each two shaft gears of each transmission line drum for selective engagement with either shaft gear, selective control means for said clutches whereby said drums maybe rotated coincidently or otherwise at like or different relative speeds.

2. A cableway hoist including a traversing line drum and two transmission line drums mounted for independent rotation, a shaft, a prime mover, means intermediate the prime mover and shaft for controlling the direction of rotation of said shaft, each said drums being provided with one or more fixed peripheral gears, gears on said shaft individual to and meshing with, the respective drum gears and being normally free running in respect to said shaft, clutch means individual to the gears on said shaft for effecting selective engagement between the shaft and the gears thereon, manuall operable means for moving said clutch means to and from operative positions. and brake means individual to said drums.

3. In a cableway hoist, a traversing line drum having a fixed peripheral gear, a shaft, a gear normally free on said shaft and meshing with said fixed gear on said drum, a clutch movable along said shaft to operatively connect said shaft and the gear thereon to cause rotation of, or cessation of movement of, said drum at will, an intermediately pivoted rod having its one end engaging said clutch to cause movement of the latter towards or away from said gear on said shaft, according to the direction of movement of said rod, a toggle control for said rod comprising endwise pivotall connected arms one of which is anchored at its outer end and the other of which is pivoted at its outer end to said rod at the end of the latter opposed to the end havstraight line relationship according to the direction of movement of said plate, whereby to effect the pivotal movement of said rod, a control rod having pivoted connection with said plate whereby longitudinal movement of said control rod will cause pivoted movement of said plate, and means for effecting the longitudinal movement of said clutch rod.

4. A cableway hoist according to claim 3, in which the said plate is spring-influenced to a position to hold said toggle arms away from a straight line relationship.

5. A cableway according to claim 3, characterised by a brake band adapted for gripping engagement with the outer periphery of said drum, said brake band having lateral spaced lugs and cam means operable to draw said lugs towards one another to cause said band to grip said drum, and a rod connecting said cam means with said toggle control whereby movement of the arms of said toggle control in relation to one another will cause movement of said cam means to its operative, or inoperative, position, according to the direction of relative movement of said arms.

6. In a cableway hoist including a traversing line drum and two transmission line drums mounted for independent rotation, a shaft, selective control means for operatively connecting said shaft with said drums individually, braking means individual to each said transmission line drums, each said braking means including a brake band adapted for gripping engagement with a transmission line drum, cam means operable to draw together the ends of said brake band, a longitudinally reciprocable rod to move said cam means to and from its operative position, a crank shaft journaled intermediately for rotation and having end portions extending laterally in substantially opposite directions, one such lateral extension being pivotally connected to the outer end of said rod. and a leverage member connected to the outer end of said crank shaft for rotating same.

'7. A cableway hoist according to claim 6, characteri ed by the fact that one such crank shaft is in the form of a tube through which the body of the other such crank shaft extends loosely.

NORMAN S. BATEMAN. MAURICE F. MISSIAEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 795,677 Austin July 25, 1905 977,499 Bailey Dec. 6, 1910 1,476,535 Miller Dec. 4, 1923 1,609,600 Bergling et a1. Dec. 7, 1926 2,010,280 Thiman Aug. 6, 1935

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