US900515A - Universal elevating and lowering device. - Google Patents

Description

I E. G. GEBAUER. UNIVERSAL ELEVATIN G AND LOWERING DEVICE.

APPLIQATION FILED DBO.24, 1907.

8 SHEETS-BHEET 1.

WITNESSES- mm/r00 G'efiauer THE NORRIS PETERS c0, WASHINGTON, n. c.

Patented Oct. 6, 1908.

B, GEBAUER. v UNIVERSAL ELEVATINQ Am) Lownnme' DEVIOB.

APPLIOATION FILED 1130451907.

Patented Oct. 6,1908.

k- 1''" I v l WITNESSL'S lA /vsyro fi C? I 485M; ATTORNEYS THE "cums PETERS co., WASHINGTON, D. c.

I E, G; GEBAUER.

UNIVERSAL ELBVATING AND LOWEBING DEVIGE. AIPLIOATIOH TILED DBO; 24,1907.

Patented 0013.6, 1908 3 SKEETS-SHEET 3.

ATTORNEYS TH: NORRIS PETERS 00., WASHINGTOAL-D. c.

2 WITNESSES INVENTOI? R M Emil 6eauer To all whom it may concern:

UTEDSTATE P TENT-carton.

GEBAUER, or SANTA rnl'riinnrronr OF NEW nxroo.

"UNIVERSAL ELEVATING AND" ownnmq DEVICE.

Be it known that I, EMIL G. GEBAUER, a citizen ofthe United States, and a resident of Santa Fe, in the countyof Santa Fe and Tere ritory of New Mexico, have invented a new and Improved Universal Elevating and Lowering Device, ofwhich the following is a full, clear, and exact description.

This invention relates to elevating and lowering devices andespecially to devices of this class employing. a cable which wraps uponadrum. v l f The object of the invention is to provide a construction which will operate to maintain the cable in a constant position as it coils or uncoils from the drum. To this end,gI pro; vide improved meansfor controlling the oper ation of the drum in such away that itwill travel to and fro as it rotates, the reversing ofl its travel being accomplished automatic; a y. i l

I have described below a small type of the machine adapted to be hand-operated and supported on a suspending cable, This type is useful for workmen or. artisansof all kinds, but the principles of the invention are applicable to elevating and lowering devices of larger type driven by power and used for any scribed hereinafter and urpose. y I p A further object of the invention is to pro: vide improved means for controlling the op: eration of the drum and for setting a brake upon the mechanism when it is desired to hold the suspended body in a fixed position. The invention consists in theconstruction and combination of parts to-be more fully departicularly set forth in the claims. i I

Reference is to be had to'the vaccompanying drawings formingfa part of this specification, in which similar characters of'reference indicate corresponding parts in all the fig- UIGS. 6 1 1 l Figurel is aside elevationof the complete device, Fig. 2 is a frontJelevation of the mechanism of the device, certain parts being broken away; this viewrepresents the mech anism as removed from the case; Fig. 2Fis an end elevation ofthe crank shaft of the machine and illustrating the manner of attaching the crank thereto, Fig. Bis a plan of the deviceas illustrated in Fig. 2, certain parts being broken away; Fig-,4 is an end elevation of the mechanisinshown in Fig. ,2,

viewed from the right. end; Fig. 5 is. a view Specification of Letters Patent. 3 Application filed December 24:, 190?, Serial No. 407,900.

Patented. Oct. e, 1908.

similar to Fig. 4, showing only a portion of the mechanism, and illustrating the parts in a difierent position from that shown in Fig.

l 4, to illustrate the manner of controlling the brake; Fig.6 is a vertical section through the device, takenon the line 66 of Fig. 3, and looking toward the right; Fig. 7 is a rear elevation of the brake shoes and showing their guide and a portion of the brake rod; in this view the parts appear as in Fig. 5 when viewed from the right-hand side, the lower portion of the mechanism being omitted; Fig. 8 is a horizontal section looking upwardly, taken through the right-hand portionlofthe machine as viewed in Fig. 3, and illustrating the trip plateand its connected parts; and Fig. 9 is a vertical section through the trip plate and its contiguous parts, and illustrating the manner in which this plate is actuated automatically by the drum of the machine.

Before proceeding to a detailed desori tion of the mechanism, it will facilitate tl ie disclosure to state at the outset, that the drum referred to above and which constitutes a part of the mechanism, is mounted so that as it rotates, it advances longitudinally. In this way, thecable assing from the drum is maintained at a fixed position with respect .to the frame of the mechanism. The drum is rotated continuously by means of a suitable crank, and mechanismis provided for automatically reversing the sliding movement of the drum at the ends of its travel to andfro.

Referring more'particularly to the parts, and especially to Fi 1, 1 represents the case .of the device, inwliich there is provided a frame 2. This frame projects above the case, and is provided with a belt 3 which is ada ted to pass around the body of the .wor man operating the device. The frame 2 alsoprojeots below the case, and is provided with straps 4 which suspend a seat 5 in which theworkm'an sits. 1 Referring now particularl to Figs. 2 and 3, in the frame 2 a horizonta crank shaft 6 is .rotatably mounted, and substantially one half portion of this shaft is covered by an elongated pinion 7. This with a gear wheel 8 which is rigidly carried by a drum 9 upon which the cable 10 is coiled, as shown. This cable passes upwardly throughaguide slot 11 formed inthe upper horizontal plate 12. of the vframe, passing pinion meshes now appear that if the "crank shaft 6 is rotated, the drum 9 will be'ro'tated, and at the the drum will advance sametime the drum will advance on the feed "screw 14 when the feed screw is held fixed.

Thus, if the crank16 were rota'tedin a righthand direction, that is, away from the observer, as indicated in Fig. 2, the drum 9 in rotating, will advance toward the left. If the crank is rotated in the other direction,

toward the right.

I jprovide mechanism by means of which the screw 14 may be held fixed, and also by means of which the feed screw may be rotated-at agreaterspeed than the drum soas to en-able the drum to "have a to and fro movement ortravel upon the screw.

Referringnow especially to Fig. 6, the gear wheel 15 referred tofa-bo've is adapted to be driven by a pinion 17 which is attached to a bracket 18 projecting from-the main body of the frame as indicated, and near this pinion 17 the crank shaft '6 is provided with a rigid pinion 19. 'On the axis of the pinion 17 there is'pivotally mounted anar-m 20 whichextends 'pjpwardly in an inclined direction as shown.

pen this-arm there is loosely mounted an er gear 21-. This gear 21 meshes with the p1nion '1 7 andis adapted to be thrown over so as to mesh with t e:pini0n 19, at certain times in "the operation of the machine. When in "the position shown in Fig. 6, the

teeth of the pmion 21 come in contact with a resilient stop or detent 22 which is attached to the side of the bracket 18. When the idler gear 21 isin this position, the'detent 22,

also-that of the'fe'ed to matic means for bringing about this conofcOurse, operates toprevent its rotation and screw 14. I provide aunection'bet'wee'n the idle gear 21 and the pinion 19, when the drum has'rea'ched the h'mit "For this pur of its movement with the feed screw 14 fixed.

'ose, to the arm 20 there is pivotally attao ed a slide 23 which is guided across the underside of the horizontal plate 12, the said slideb'eing provided "with a slot -24'through'whieh a suitablep'in or roller 25 ipasses, the said pin being attached in the side the free extremityof a cam "cated dotted lines-in Fig. 3.

its

of'the frame -2 so *as to-cons'titu'te a guide for In the upper edge of this slide 23 notch 26, "and this-notch receives plate '27, indi- The extremcam plate,'when it is projected in a I provide a ity of this with a rigid gear ally mounted at elevated position.

tongue 34 at the end of the wing 33.

manner which will be described later, passes through an opening 28 formed in the side of the frame, as illustrated most clearly in Fig. 4. This cam late'is' rovided with an offset longitudinally disposed cam slot 29, as shown in Fig. 3, and its extremity is pivotally attached to the rearwardly projecting arm 30 of a trip plate 31. This trip plate is pivot- 32 upon the under side of the horizontal wing plate 32 In order to bring the trip plate to the proper position to cooperate with the other parts, the wing plate 32 is provided with a forward. extension or wing 33 to which the attachment is made'as shown. This wing-33 is elongated in a direction parallel with the crank or drive shaft, and its ends are formed into a'rojecting tongues 34. These tongues are of dovetailed form; that is, t'heyenlarge toward their outer extremities, said outer-extremities being cut on curved lines 35 which are struck from the pivot point 32 as a radius that is, these edges are disposed circumferentially about the pivot point 32, and the side edges of the tongues are radially disposed with respect to the pivot .points. In addition to this, the side edges of the tongues-are beveled as in dieatedin Fig. 9. This figure, and also Fig. 8, further illustrate the mechanism now being described.

The body of the trip plate3l is of substantially rectangular form, and itsends are provided with four-'guides-36, the said guides being disposed at the corners of the tri plate, as shown most clearly in Fig. 3. 11 these -guides36, awls 37 are respectively mounted.

These paw s consist of small blocks or sliding plates, and they are provided near their middle points with openings 38. These openings 38 receive the extremities of light wire springs 39 which are attached to the under side of the frame as indicated in Fig. 8. These springs tend to hold the pawls in -an The pawls normallyproject slightly below the lower ends of the guides, and their inner or adjacent edges are formed with notches 40 respectively, so that a vertically disposed The lower-edge 42 of each pawl inclined as shown, so that the each pawl presents shoulder 41. is beveled or effect of a projecting tooth results at this point.

The inner upperedges or corners of thepawls 37 are provided with bevelsor beveled. edges 43. The'trip plate is adapted to-assume two positions; in one of these positions, one of the pawls is in an elevated )ositio'n at one end of the plate, while the o't rer-pawl at' th'e same end of the plate is in a depressed position. The swinging or rocking movement of the trip plate is such that when a certain pawl is in its elevated position, its beveled edge 43 engages with the beveled 'side'edge (if the der to actuate the trip plate by means of these pawls 37, the head 44 of the drum is enlarged so as to constitute a disk, and this disk is provided at a suitable point with a fixed dog 45. This dog'describes a helix in the air as the drum advances and progresses along the feed screw. In its path the pawls may project, as indicated in Fig. 9. Referring to this figure, it will be evident that when struck by the dog, the trip plate will be moved toward the right. When this takes place, the movement is sufficient to bring the right-hand pawl beyond the edge of the wing 33, and it moves u into a position corresponding to that of t eleft-hand pawl shown in this view, which also moves out of the path of the dog. As the tripplat'e moves in this way, the beveled edge 43 of the formerly-elevated pawl cooperates with the beveled edge of the tongue 34 to depress this pawl into the position normally occupied by the right-hand paw It should be understood that the disk or head 44 travels in the space between the ends of the trip plate 31, and when it arrives at one end, it throws the late in one position, and at the other end, it fhrows it into an opposite position. In this connection, referring to Fig. 3, it will be a parent that if the pawl, indicated specifica y "by the numeral 37 is struck by the dog 45 so as to move the pawl .rearwardly, that is, upwardly upon ig. 3, the trip plate will be rocked toward the right so that the arm 30 will advance the cam plate 27 toward the right. The pawl 37 b will then move toward the front, or down..- wardly in Figs, and will move to'a de ressed position. T ough the medium of t e cam slot 29, the advance of the cam plate 27 operates to throw over the slide 23. This follows from the fact that, cooperating with the cam slot 29, there is provided a pin or roller 46, as illustrated in Fig- 3, the said pin being attached to the under side of theframe plate 12 under which the cam plate slides. Thus it will be seen that the slot 28 simply operates as a guide so as to permit the cam plate to move in a horizontal plane; When the slide 23 is advancedas described, the arm 20 is rotated toward the right. This disengages the idle gear 21 from the detent 22, and brings it into mesh with the pinion 19.

' The continued rotation of the crank shaft the gear wheel 15.

continues to rotate the drum in the same direction as before, but the feed screw 14 is now given a movement through the medium of the pinion 19, idle gear 21, pinion 17 and In this way thefeed screw 14 is rotated in the same direction as the drum. This rotation is at an increased speed, so that the drum in rotating, will return along the screw toward the op osite end of its travel. It will be observe that the pawls 37 and 37 are'diagonally opposite to each other. If the drum were rotated in a direction to unwindthe cable, the dog 45 would coiiperate with the two pawls 37 and 37 which are also disposed diagonally opposite to each other.

I provide brake mechanism which operates to allow the'drum to rotate in a winding direction, but which automatically operates so as to resist and stop the rotation of the drum when unwinding. This mechanism is most clearly shown in Figs. 4, 5 and 7. It comprises a guide plate 47 which is attached rigidly to the side of the frame, as shown, the

said guide plate presenting an outwardly projecting flange 48 which lies near the periphery of a brake disk 49, the said brake disk being rigidly attached upon the crank shaft or power'shaft 6. The flange 48 is formed with a slot 50, as illustrated most clearly in Fig. 7, and this slot is wedge-shaped that is, it is contracted toward its lower end.

Upon the shaft 6 on each side of the brake disk or wheel 49, arms 51 are loosely attached,

and these arms near their outer extremities,- are provided with shoes '52 having a large area and lying against the face of the wheel. Beyond the shoes 52 the arms 51 are formed into necks 53 which project through the slot 50. These necks are pulled toward each other by a small spring 54 as shown in Fig. 7.

The ends of these arms, that is, the ends of the necks, are rounded on their outer sides,

and substantially flat on their adjacent sides.

On their upper edges they are notched so as to be engaged by a drag plate 55, the said drag plate being provided with a pair of large openings 56 through which the necks 53 maybe passed. The lower edges of the necks 53 rest against the lower edges of the openings 56. The drag plate 55 is formed upon the. end of a brake rod 57, which rod extends downwardly in an inclined direction, its lower end being pivotally attached to a brake cam 58. This cam is pivoted at 59 and has a cam toe 60 which projects downwardly. Pivotally mounted near the cam toe I provide a releasing lever 61, which is normally held by a spring 62 in a position remote from the cam 58.

From the end of the lever 61 a ring 63 is suspended, andif this ring is pulled downwardly, the lever 61 will rotate downwardly and come into engagement with the toe 60. In doing so, it will force the cam 58 into the position shown in Fig. 4; that is, it will push the brake rod 57 upwardly. In this way the brake arms 51 are moved so that the shoes 53 are disposed in the upper end of the slot 50. The slot 50 is proportioned so that when the shoes are in this position, they will not engage the brake wheel 49 with any force. The direction of rotation of the brake wheel 49 fort-he winding on movement of the drum,

.is that which is indicated by the arrow in the mechanism edges of the slot which enga e the outer faces of the necks, am them with great force against the wheel, and prevent its further rotation. Thus, it will be seen that an automatic brake is provided, which becomes appliedat once upon the reversing or unwinding movement of the drum. The brake, of course, may be released by pulling down the releasing lever 61 until it engages the cam as suggested.

The crank 1.6 is attached in such a way that it may be readily thrown out of operative connection with the crank shaft '6. Forthis purpose, on the projecting extremity of the crank shaft 6, a loose collar 64 is attached, and to the side of this collar the crank 16 is pivotally attached, the crank being provided with an offset car 65, as illust-rated in Fig. 2. The end of the shaft 6 is formed into a transversely elongated flat tongue 66. In the hub 67 of the crank a rectangular opening 68 is formed, which fits this tongue 66, so that the crank may engage with the shaft as illustrated. If it is desired to disengage the crank from the shaft, it is only necessary to rotate it toward the left, as viewed in Fig. 2, the rotation taking place about the pivotal connection between the crank and the collar. 67 of the crank becomes detached from the tongue, and the crank will be allowed to hang down from the collar 64. In descending to a considerable distance, the crank would be disconnected in the manner described, so as to enable the crank shaft to rotate without rotating the crank.

The mode of operation of the machine will now be described: The workman or operator of the machine sits upon the seat 5 with the belt 3 passing around the upper portion of his body. He then operates the crank 16 with his right hand and controls the brake with his left hand by means of the ring 63. The rotation of the crank shaft 6 is imparted to the drum 9. Supposing that the feed screw 14 is held fixed by the detent 2-2, the

rotation of the drum will operate to advance 1t along the screw.

When the drum arrives near the limit of its travel in this direction,

the dog 45 carried by the drum head 44, will strike against one of the pawls of the trip plate and throw the trip plate to the opposite position. Through the medium of the cam plate 27, the trip plate operates to throw in for driving the feed screw, and the feed screw is then rotated in the same direction asthe drum, but at twice the angular velocity thereof. This operates to "draw the drum toward the opposite end of its travel, reversing its movement. The pitch of the thread of the drum is such that In this way the hub this operation results in maintaining the winding point of the drum constantly in line with the pulley 13.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. In mechanism of the class described, in combination, a frame, a feed screw mounted therein, a drum rotatably mounted on said feed screw and adapted to be advanced by the thread. thereof, means for rotating said drum, and means for intermittently rotating said feed screw, whereby said drum travels to and fro upon said feed screw.

2. In mechanism of the class described, in combination, a frame, a drum rotatably moui'ited therein and adapted to receive a cable, said drum having a head with a dog attached thereto, means for advancing said drum longitudinally as it rotates, and mechanism actuated by said dog for reversing the direction of longitudinal movement of said drum.

3. In mechanism of the class described, in combination, a frame, a drum rotatably mounted in said frame, means for advancing said drum longitudinally as it rotates, a dog carried by said drum, a trip )late adapted to be engaged by said dog, and mechanism actuated by said longitudinal movement of said drum.

4. In mechanism of the class described, in combination, a frame, a feed. screw mounted therein, a drum rotatably mounted on said feed screw, means for rotating said drum, mechanism for driving said feed screw, and automatic means for throwing said last mechanism in and out of connection with said feed screw.

5. In mechanism of the class described, in combination, a frame, a feed screw, means "for normally holding said feed screw lixed against rotation, a drum rotatably mounted on said feed screw, means for rotating said drum, mechanism for rotating said feed screw, and autoi'natic means for connecting and disconnecting said last mechanism with and from said feed screw.

6. In a machine of the class described, in combination, a frame, a feed screw mounted therein, a drum. rotatably mounted on said feed screw, means for rotatingsaid drum, a gear wheel carried by said feed screw, a movable gear adapted to drive said gear wheel, and automatic means for moving said movable gear to disconnect or connect said feed screw.

7. In a machine of the class described, inv combination, a frame, a drum rotatably mounted therein, and adapted to travel to and fro longitudinally, a pivotally mounted trip plate having p'awls, a dog carried by said drum and adapted to engage said pawls, and means actuated by said trip plate for controlling the travel of said drum.

trip plate for reversing the feed screw and receivingta longitudinal '8. In a machine of the class described in combination, aframe', afeed. screw mounted therein, a drum rotatably mounted on said travel from the thread of said screw, a pinion adapt-ed to rotate when said drum ro tates, a gear wheel carried by said feed screw, a movable gear adapted to meshwith said pinionand adapted totransmit the rotation thereofto said first'gear wheel, a trip plate said drumfor actuating said trip plate, and

a connection from said'trip. plate to said movable gear for engaging or disengaging said movable gear with and from said pinion.

,9. Ina machine of the class described, in combination, a frame,,;a feed screw mounted therein, a drum rotatably mounted on said feed screw, means for rotating said drum, a, trip plate pivotally mountedon said frame and aving pawls forreversing the position thereof, means carriedlb y said drum forv engaging said pawls to actuate said trip plate,

and mechanism actuatedbysaid trip plate for intermittently driving said feed screw.

10. In a machine of the class described, in

combination, a frame, a feed screw mounted therein, a drum rotatably mounted on said feed screw, means for rotatingsaid' drum, a trip plate pivotally mounted on' 'said frame and avingpawls for reversing the position thereof, means carriedby said drum for engaging said pawls to actuate said trip plate, mechanism actuated by said tri plate for intermittently driving s'aid'fee screw, and means for intermittently holding said feed screw fixed.

11. In a machine of the class described, in combination, a frame, a feed screw mounted therein, a drum rotatably mounted on said feed screw, a shaft for rotating said drum, a pinion carried by said shaft, a gear wheel rigid with said feed screw, a pinion meshing with said gear wheel, an arm pivotally mounted coaxially with said last pinion, an idle gear carried by said arm and adapted to mesh with said first pinion, and automatic means for actuating said arm to throw said idle gear in or out of mesh with said first pinion. V

12. In a machine of the class described, in combination, a frame, a feed screw mounted therein, a drum rotatably mounted on said feed screw, a shaft for rotating said drum, a pinion carried by said shaft, agear wheel rigid with said feed screw, a' pinion meshing with said gear wheel, an arm pivotally mounted coaxially with said last pinion, an idle gear carried by said arm and adapted to mesh with said first pinion, automatic means for actuating said arm to throw said idle gear in or out of mesh with said first pinion, and a detent engaging said idle gear when out of engagement with saidfirst pinion.

13. In a machine ofthe class described, in

combination, a .frame, a drum rotatably "mounted therein, 'means for rotating said drum, means for imparting a longitudinal travel'to said drum, a wing plate, a trip plate pivotallymounted on said wing plate, movable pawlsmountedin said trip plate and havingadvariced or withdrawn positions depending upon the position of said trip plate, means carried by said drum for engaging said pawls to reverse said trip plate, and means actuated, by said trip plate for actuating said feedscrew.

, 14. In amachine of the class described, in combination, a frame, a feed screw mounted therein, a drum rotatably mounted on said feed screw,a wing plate, a trip plate mounted on said wing plate, movable pawls carried by said trip plate and having beveled upper edges cooperating with said wing plate to advance said pawls, resilient means tending to withdraw said pawls, meanscarried by said drum and engaging said pawls to operate said trip plate, and means actuated by said trip plate for rotating said feed screw.

15. In a machine of the class described, in combination, a frame, a drum rotatably mounted in said frame, means for giving said drum a longitudinaltravel, a wing plate, a tripplate pivotally mounted on said wing plate and having movable pawls, resilient means tending to maintain said pawls in a withdrawn position, said wing plate and said trip plate having beveled edges cooperating to advance said pawls when said trip plate is rotated, means moving with said drum to engage said pawls for actuating said trip late, and means actuated by said trip plate or reversing the traveling movement of said drum.

16. In a machine of the class described, in combination, a frame, a feed screw mounted therein, a gear wheel rigid with said feed screw, a drum rotatably mounted on said feed screw, a gear wheel carried thereby, a crank shaft having an elongated pinion meshing with said second gear wheel, a second pinion carried by said crank shaft, a trip plate, means for actuating said trip plate automatically from said drum, and mechanism connecting said trip plate with said pinion for driving said first gear wheel to rotate said screw.

17. In a machine of the class described, in combination, a drum adapted to receive a cable, a brake wheel ada ted to rotate with said drum, arms pivotallg mounted on the axis of said brake wheel, having shoes engaging the sides of said brake wheel, and means tending to force said arms together, controlled by the direction of rotation of said brake wheel.

18. In a machine of the class described, in combination, a drum adapted to receive a cable, a brake wheel rotating with said drum, a bracket disposed adjacent to the edge of said brake wheel and having a tapered opening therein, brake shoes guided by saidopening and disposed on each side of said brake wheel, and means for 'maintainin a light pressure of said Ebrake shoes on said wheel, whereby the friction of movement between said wheel and .said shoes may jam said shoes in said tapered opening to apply the braking pressure to said wheel.

'19. In a machine of the class described, in combination, a drum adapted to receive a cable, a'brake wheeirotating with said drum, a bracket disposed adjacent to the edge of "20. In a machine of the class described, in

eombinatioma drumadapted to have a cable wrapped thereupon, a brake Wheel rotating with said drum, a bracket having a tapered opening lying adjacent to the edge of said wheel, brake shoes having necks rojec'ting through said tapered opening and engaging the edge thereof, whereby a movement of said shoes 011 one end of said opening may jam said shoes against said brake wheel, and means for maintaining a sli ht pressure of said brake shoes 011 said wheed.

21. Ina machine of the class described, in combination, a frame, a drum .rotatably mounted in said frame and adapted to receive a cable, a brake Wheel rotating with said drum, a bracket carried by said frame,

having a tapered opening therein lying near -10 said bra-ke'wheel, arms ivotally mounted on the axis of said Wheel raving shoes adapted to press the faces of said wheel, and having neck-s projecting through said tapered opening and engaging the edges of said opening, means for maintainin a light pressure of said shoes on said bradre Wheel, whereby a rotation of said Wheel in one direction may apply the brakes by forcing said necks toward the contracted part of said opening, and a brake rod connected with said necks for releasing the brake shoes.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EMIL G. GEBAUER.

Witnesses:

THOMAS S. CONROY, BERNHARD ToWNrnR.

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