US784586A

US784586A - Hoisting device.

Info

Publication number: US784586A
Application number: US19729704A
Authority: US
Inventors: Richard Mcgahey
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-03-09
Filing date: 1904-03-09
Publication date: 1905-03-14
Anticipated expiration: 1922-03-14

Description

No. 784,586. PATENTED MAR. 14, 1905.

' RQMGGAHEY.

HOISTING DEVICE.

APPLIUATION FILED MAR.9.19o4.

s SHEETS-SHEET 1.

@LAA

W/TNESSES: M/VNTUR ATTUHNEYS No. 784,586. PATENTED MAR. 14, 1905. R. MoGAI-IEY.

' HOISTING DEVICE. APPLIUATION FILED MAR.9,1904.

3 SHEETS-SHEET 2.

77W/ WITNESSES: Q/f? www A TTORNEYS PATENTED MAR. 14, 1905.

R. MCGAHEY. HOISTING DEVICE.

APPLIOATION FILED mn.s,19o4.

3 SHEETS-SHEET 3.

WITNESSES: WCM

Vtional detail substantially on the line 5 5 in UNTTED STATES Patented March 14, 1905.

RICHARDMCGAHEY, OF vWALLA W ALLA, WASHINGTON.

HOISTING DEVICE.

SPECIFICATION forming part of Letters Patent N o. 784,586, dated March 14., 1905.

Application filed March 9, 1904. Serial No. 197,297.

To {1J/Z whom, it may cm1/cern: l

Be it known that I, RICHARD MCGAHEY, a i citizen of the United States, and aresident of l/Valla Walla, in the county of Talla Talla and State of Washington, have invented a new and Improved H oisting Device, of which the following is a full, clear, and exact description.

The invention relates to means for hoisting material from one point to another one and depositing it, and has forits object to provide novel details of construction for a hoisting device that adapt it for very convenient service for the elevation of material of dierent kinds and that render it especiallyT well adapted for the hoisting of grain in bags and the piling of such packages of material in tiers for compact stowage in a warehouse in an expeditious and safe manner and also effect the lowering and transfer of such material to a wagon or car, as occasion may require.

The invention consists in the novel construction and combination of parts, as is hereinafter described, and defined in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a perspective view of one form of the improved hoisting device arranged for operation by means of a power-generating motor. Fig. 2 is a side view of the preferred form of apparatus seen in direction of the arrow a in Fig. 3. Fig. 3 is a side View of the same seen in direction of the arrow fr," in Fig. Q. Fig. 4 is a detached perspective view of a crane employed. Fig. 5 is a longitudinal sec- Fig. 6. Fig. 6 is a side view of the lower portion of a derrick-mast employed; and Fig. 7 is a longitudinal sectional view of a telescoping derrick-mast, taken substantially on the line 7 7 in Fig. 2.

ln the drawings that represent the construction and operation of the device, 10 indicates a preferably rectangular platform that may be rendered portable by providing it with a suitable number of casters, (not shown,) which adapt the same for convenient transfer from one point to another. On the platform 10 a two-part derrick-mast is erected at a suitable point. the lower section 11 of said mast being hollow and preferably rectangular in crosssection, either wood or metal being employed f for its construction. The hollow section 11 of the derrick-mast is securely held in a vertical position by four metal brace-bars 12, that are secured by their upper ends upon the sides of the said mast-section and at their lower ends upon the platform 10 by bolts a, that engage pads formed on the ends of the braces, as is clearly shown in Figs. 1, 2, and 3. The upper section 13 of the derrick-mast is fitted to slide in the lower section 11 and when in place therein extends a suitable height above said lower section.

In one side wall of the upper mast-section 18 a longitudinal groove I) is formed, that preferably extends' from the lower end thereof to a point somewhat above the upper end of the lower section 11 when the upper section is completely lowered in the mast-section 11. Upon the lower end of the mast-section 13 one end of a iiexible connection, such as a rope 14, is aflixed, as is indicated in Figs. 5 and 6, and thence extends upward within the groove L. A grooved pulley c is held to rotate in a bracketframe c', that is secured adjacent to a slotopening in the upper portion of a side of the lower mast-section 11, thus disposing the pulley opposite the groove L in the upper mastsection 13 and permitting the upper portion of the rope 14 to be extended through the slotopening and in contact with the upperA side of the grooved periphery of the pulley c, so that the extended portion of the rope may hang pendent therefrom, as shown in Figs. 2 and 3. In the hollow mast-section 11 spaced perforations (l are formed, which extend through two opposite side walls of the same. The upper mast-section 18 may be drawn upward by manipulation of the pendent end portion of the rope 14, and thus give a desired elevation thereto, and to maintain the mast-section in elevated adjustment a stopbolt e is inserted in a perforation d, and the mast-section 13 is then seated upon said bolt.

At opposite sides of the derrick-mast section 11 and suitably spaced therefrom two similar windlass frame-posts 16 are respectively erected' and secured upon the platform 10, these posts being braced bytransverse bars 17, that are bolted upon the mast-section 11 near their longitudinal centers, as shown at g in Figs. 2 and 3, and at the ends .upon the edges of the posts, as appears in said figures. In suitable box-bearings t, secured oppositely in the posts 15 16 near their upper extremities, and in alining boxes t, secured in opposite perforations inside walls of the mast-section 11, a windlass-shaft 18 is journaled, as shown clearly in Fig. 7, said shaft passing loosely through a longitudinal slot e', extending from the lower end of the mast-section 13 for a proper length toward the upper end of the mast-section, and preferably at its transverse center. As shown in Figs. 3 and 7, a bracebar 19 is extended diagonally between the .posts 15 16, passing' through perforations in the mast-section 11 and also through the slot el, this brace-bar serving to further stiffen the posts and prevent them from inclining in any direction. A windlass-drum 20 is mounted upon and secured to the shaft 18 between thc mast-section 11 and the post 16.

Upon the upper portion of the mast-section 13 a crane 21 is held to rock by means of a pivot-bolt or the like, that loosely engages perforated end portions Z of the crane and eye-bolts Z', that are secured iu the mast-section directly above the windlass-drum 20, and,

as shown in Figs. 8 and 4, two grooved sheaves fm, and m are pivoted on the horizontal member of the crane 21. A flexible connection, such as a rope 22, is secured by one end upon the windlass-drum 20 and is extended therefrom upwardly, passing over the sheaves m f/n/ and hanging pendent from the latter.

Upon the shaft 18, between the mast-section 11 and the post 15, a friction or brake drum 23 is placed and secured, and upon the periphery of said drum a friction-band 24 is mounted.

A treadle is pivoted near its center between the post 15 and the mast-section 11, as indicated at a in Figs. 2 and 3, thus projecting two treadle members 25 from the pivot-center toward oppositelsides of the platform 10. On each treadle member 25 a hook o or other equivalent securing means is placed, these similar means being' positioned at an equal distance from the pivot a, and it will be seen that the lapped perforated ends of the friction-band 2a may have a hooked or other detachable engagement with either of the hook projections 0, and thus be connected with the treadle-section it is desired to use.

Two ratchet-wheels 26 of an equal diameter, but having their teeth inclined oppositely, are secured together, so that central perforations therein are alined, and are neatly fitted upon the end of the shaft 18, that projects outside of the post 15. A handle-lever is provided for the manual rotation of the shaft 18 in either direction, as may be desired, said lever comprising a straight flat bar 27 and a corresponding lever-bar 27 The lever-bar 27 is bent laterally at p nearer one of its ends than the other, and near said bend p an obtuse angular bend p' is formed, thus producing a padp, which is secured upon the normal inner side of the lever member' 27, whereby the two members 27-27 are spaced apart. As shown in Figs. 2 and 3, a handle 27h is secured upon the end of the handle member 27 near the iiange or pad p2, so as to project outward at a right angle thereto, which affords convenient means for manipulating the two-part handle-lever. The other ends of the lever members 27 27 are perforated transversely near theirextremities, said opposite perforations being of a suitable diameter to receive the end of the shaft 18 that projects ,outside of' the post 15. Vhen the two-part handlelever is loosely mounted upon the shaft 18,

an adjacent side of the lever member 27 has contact with the face of a hub that projects from the post 15 and is spaced by said hub from the post. A pivot-bolt f7' is inserted through two opposite perforations in the lever members 27 27 near the bend p, said bolt receiving the transversely-jiierforated hub end portion of a pawl v", which is loosely mounted thereon, and, as shown, the pawl is adapted for engaging' its free end or toe with either ratchet-wheel when it is disposed so as to locate it opposite such wheel. To permit such change in engagement of the pawl /r with the pivot-bolt r to be readily effected, the pivotbolt is held removably in place by a crosssplit key r, that engages a transverse perforation formed in the end of the bolt that projects outside of the lever member 27, and to dispose the pawl opposite the ratchet-wheel which it is to engage a spacing-thimble fr2 is loosely mounted upon the pivot-bolt between the pawl and the lever member 27 27 from which the pawl is farthest spaced. The pawl 1" is provided with a heavy toe portion fr, that adapts said toe to readily fall into engagement with the teeth of the ratchet-wheel opposite which it is disposed, and, as shown in Figs. 2 and 3, a lateral projection fr is formed on the hub portion of the pawl, which is adapted to impinge upon an edge of either lever member 27 27" near which it may be disposed, and thus prevent the free end of the pawl from falling away too far from the teeth' of the ratchet-wheel.

1n arranging the handle lever and the ratchet-wheels for service the latter are placed on the projecting end of the shaft 18, to-l gether with the two-part handle-lever, between its members 27 27, and the ratchetwheels are firmly secured in place on the shaft.

Assuming that the pawl fr' is arranged on the pivot-bolt fr so as to be adjacent to the TOO IIO

lever members 27, as indicated in Figs. 2 and only necessary to remove the pivot-boltr and pawl thereon and then replace the same, with the pawl turned around half-way, so as vto adapt it to engage the teeth on the Wheel nearest the post 15 and at the Sametime change the position of the thimble r3. This change in relative position of the parts will adapt the crank-handle 27 27L for rotation' from left to right and wrap the rope 22 on the drum 2O in direction from right to left, so that by a' simple and quickly-effected adjustment of the details, as described, the operator may use either hand for manipulating the crank-handle and rotate the shaft 18 in accordance therewith.

It is to be understood that when using the described mechanism the treadle member 25 that is at the right side of the shaft 18 is to be employed for arresting the rotation of said shaft when the rope 22 is unwound by a suspended weight when the crank handle is adapted for rotationfrom right to left, and the treadle member that projects beyond the shaft at the left-hand side thereofl is` used Vwhen the crank-lever is adapted for rotation material must be handled in a limited time.

'Ihe improved hoisting device that has been described is extremely well adapted for the hoisting' and depositing in rapid succession of a large number of filled bags of grain in vertical tiers` as will appear from the followingdescribed operation.

It will be seen that when the crank-lever 27 is raised from a pendent position until the pawlw' by its gravity falls into engagement with the ratchet-wheel 26 that is near the member 27 of the lever the manual rotation of the crank-lever from right to left will wrap up the rope 22.

Upon the pendent end of the rope 22 a pair of bag-gripping tongs 28 is secured that are formed, preferably, ofmetal-rod material,each bent to provide a looped hook member t on its free end and an eye t on the opposite end, said eyes having a loose engagement with a ring u, that is secured upon the lower end of the rope. The tongs 28 are clasped upon op- Ordinarily the work of piling sacksA posite ends of a grain-bag, as shown in Fig.

1, and then thecrank-lever 27 is turned, as before explained, until the rope 22 has been sufficiently wrapped upon the windlass-drum 2O to properly elevate the sack or bag. The operator now treads upon the adjacent treadle member 25, thus causing the band 24 to frictionally engage the brake-drum 23 and hold the shaft 18 and drums 23 30 from rotating, which will preventa descent of the bag. An assistant now swings the bag that is held suspended to a proper point for its deposit and then signals the one who controls the hoisting operation to release the brake by removal of foot-pressure from the treadle member 25`, which will reverse the movement of the windlass-drum 20, owing to the pull on the rope 22 proudced by the slight dropping movement of the sack or bag, which will so relax strain on the rope as to permit the tongs 28 to be removed from the sack or bag after it has been placed in position. The crank-lever 27 27 drops into a pendent position upon its release after the brake has been set by footpressure on the treadle member 25, which will permit the pawl r' to drop away `from the ratchet-wheel 26 it has been engaged with, and thus release the windlass-drum 20 for a free reverse movement of the rope under stress of the weight of'the suspended bag, and it will be apparent that this feature of construction and operation is very advantageous, as it obviates danger of injury that might result if the crank-lever were affixed upon the shaft 18 and turned with it.

In Fig. 1 the improved hoisting mechanism is shown in connection with a portable engine that may be of any preferred construction, the motor represented in said figure being of a well-known kind that is adapted to use gasolene as a motive agent. In this construction of the elevating' apparatus the two-part derrick-m'ast may be formed of metal Vand each section 111 and 13a may be tubular to give them strength and lightness. -The mast and motor, together with a tank for holding the liquid motive agent, yare all placed in proper relative positions on theplatform 10, that is essentially similar to the platform 10, but may have greater area. In this case the windlassdrum 20 is driven by friction or other gear directly from the main shaft o of the motor and winds up the rope or other flexible connection 22Xl by the rotation of the drum in one direction, a release of the drum from the motor-gear permitting it to revolve freely in an opposite direction, this release being effected by any suitable means. (Not shown.)

Upon the windlass-shaft 18u at one side of the windlass-drum 20 a brake-drum 23 is secured, whereon the friction-band 24 is mounted, having the lapped pendent ends thereofloosely secured upon the trcadle 25, that is conveniently positioned on the plat- IIO form 10a for reception of foot-pressure.

In operating the power-actuated hoisting apparatus the motor is put in motion, and after a filled sack or bag A has been gripped by the tongs 28 direct connection of the motor with the windlass-drum 20 is effected through a frictional engagement of the friction-wheels B B, respectively located on contiguous ends of the windlass-shaft 18 and the main shaft o of the motor. Thiswill wrap up the rope 22 until the bag has been lifted to a proper height. Then the treadle 25 is depressed to set the friction-brake, and the motor is detached from the windlass-shaft, so as to per- "mit the latter to rotate freely in a reverse direction from that received from the motor. The assistant now moves the bag into a proper position by swinging' it through the medium of the crane 21, and the bag is dropped upon others in a tier by release of the friction-brake upon removal of foot-pressure on the treadle 25.

It will be apparent that the improved hoisting device, whether operated by a motor or by hand-power, is very convenient, rapid in service, labor-saving, and is equally well adapted for piling bagged material in tiers in a warehouse or placing such material on cars or the like for transportation.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A hoisting' device comprising' a movable platform, a derricl-mast formed in two telescoping sections and erected on the platform, the lower section of the mast having box form,

the upper section having'a longitudinal slot.

extended from the lower end and a longitudinal groove in one side, a rope fastened at one end upon the lower end of the upper section and extending up in the groove, said rope extending out through the upper end of the lower section of the mast and hanging over a sheavecarried by said lower mast-section, a rotatably-supported windla'ss-shaft passing through the lower mast-section and occupying the slot in the upper section thereofI when it is lowered, a drum on the shaft, a crane on the upper section of the mast, a flexible connection fast on the drum and extended up and over supports on the crane, and means for rotating the shaft.

2. In a hoisting device of the character described, the combination with a rotatably-su pported windlass-shaft, and ratchet-wheels secured upon the shaft, having their teeth inclined oppositely, of a crank-lever having parallel members that embrace the ratchet-wheels and are loosely mounted upon the shaft, a weight-pawl pivoted changeably on the cranklever so as to be adapted to engage either ratchet-wheel, and means for supporting the pawl inclined away'from the ratchet-wheels.

3. In a hoisting' device of the character described, the combination with a verticallysupported derrick-mast, a horizontally-supported rotatable windlassshaft, a friction brake-drum secured on the shaft at one side of the mast, a windlass-drum thereon at the other side of said mast, a swinging support on the upper portion of the mast. and a flexible connection extended from the windlassdrinn up to and over the swinging support so as to hang pendent therefrom, of a pliable band mounted on the friction brake-drum and having its lapped ends extended downwardly, a treadle-lever pivoted near its center on a suitable support so as to provide two integral members therefor that extend oppositely from the pivot, and means for detachably securing the ends of the pliable band upon either member of the treadle.

4. ln a hoisting device of the character described, the combination with a platform and a derrick-mast comprising a hollow lower section fixed upon the platform, andan upper section slidably occupying the lower section, of means for raising and holding the upper mast-section at a desired point in the fixed lower section comprising the formation of a longitudinal groove in a sidewall of the upper mast-section, a bracket-supported pulley secured opposite a slot formed in a side wall of the lower mast-section near its upper end and opposite the groove in the Lipper section, a rope or the like fastened at one end in the lower end of the groove and loosely bedded therein, the upper portion of said rope passing out of the slot and resting on the pulley, and a stop-bolt insertible in any one of a series of spaced perforations formed transversely in the lower mast-section, said bolt affording support for the lower end of the slidable mast-section.-

5. A hoisting device, comprising a mast formed of telescoping sections, the upper section having its lower end longitudinally slotted, means for adjusting' and holding the upper mast-section in position, a revoluble windlass-shaft extending through the lower mastsection and the slot of the upper mast-section, a drum on the shaft, a crane on the upper mast-section, and a rope secured to the drum and passing over supports on the crane.

6. In a hoisting device, the combination with a mast, a crane at the upper end of the mast, a drum, and a rope on the drum and passing' over supports on the crane, of a brakedrum on the shaft of the hoisting-drum, a brake-band on the brake-drum, and a treadle pivoted at its center to form two treadle members, each member being provided with means whereby the ends of the brake-band may be attached thereto.

7. In a hoisting device, the combination of a hoisting-drum, ratchet-wheels on the shaft of the drum and having their teeth oppositely inclined,'a crank-lever loosely mounted on the drum-shaft, a pawl interchangeably pivoted to IOO IIO

IIS

the crank-lever to permit it to engage either ratchet-wheel, a brake-drum on the hoistingdrum shaft, a brake-'band on said drum, and a treadle pivoted at its center to form two tre-edle members, each member being provided with means whereby the ends of the brakeband may be detaehably secured thereto.