US941722A - Hoisting appliance. - Google Patents

Description

C. MOULTQN, HOISTING APPLIANCE.

APPLICATION FILED JUNE 15, lOG.

@tem im. 3s, ww.

lt 0. MOULTON, DE ISGSTN, MJSSACHUSETTS, SSIGNOR, BY MESNE ASSIGNMENTS, if@ SIMPLEX SELF-HGISTING MACHIITE COlPriN-f, OF BOSTON. MASSACHUSETTS,

@litigi/22,

' .viewer himself to any extent desired, the epplieifiee being adapted particularly .tor the use of painters working on the verticui L: of buildings.

' The invention is embodied in am appliance comprising 'a frame having ineens for engagmg a. sling or other support for the indilViduel suspended, e drinn ournaled in beurings on the frame, e suspending rope en- `-p a: ;ed at one end with the drum, end adapted to be engaged et its upper end with en elevated support, mechanism carried by the frame and adapted to be Worked by the individuel supported by the freine to rotate the drum, and thus Wind or unwind the rope, and means for compensating for inclinetions of the drinn due to the :mproeeh or" the suspending portion of the rope to one end or the other of the drum, such inclination having e. tendency to cause the separation of the convolutions of the rope, and therefore to prevent the winding ot the rope in compact courses` or helical coils on the drum.

The invention is also Aembodiedin :in appliance characterized as above stated, end provided with improved means for retardlng the rotation oi the drum when the device is used to lower the supportedy individual, and improved ineens tor arresting the downward movement of the appliance, and holding it et any predetermined height desired.

rThe Yinvention consists in the several iinprovements which I will now proceed to described ond claim.

Of the accompanying drawings forming u part of this/specification, Fi 'urel represents an end elevation of en appliance oinbf dying my invention. Fig. represents L. si elevetion of the seme. i iiig. E represents en eleretion oi' the opposite end of the appliance lfrom that shown in'iTig. l. Fi: 4 i;

Specification of Letters Petent,

implication fried June 15, 1908,

@Grial No. SBASSL ieee.

sents g1 top plan view oi.I the appliance. Fig. represents e. sec-lion on line oi' Fig. 5. .fi'icz 6 ip neseiiis :i .section on line (3W-(3 of Fig. Fig. T represents u side View oi. the inner side ci" the locldngpuwl shown in lhe seme churucters of reference indicate the sume ports in all the drawings iiy improved upplizince comprises u supportingl Yrame which muy be or any suitable construetion, which here shown comprises two side pieces lf connected by suitobio bolts iii, und connected et their lower ends to form :.1' hunger to which is connected :i snep hoot: let, or other suitable device to enguge the ioud to be supported by the up pliance. ln 'use the appliance is used singly to support the body of u workmen, the snep hook H muy engage e. sling7 and in cese a pair oi appliances ure used to support a. platform or scuil'old7 euch of the hooks 14 may be suitably engaged with `the platform.

l5 represents :L drum, the shuij't 1G01 which is journeied in bearings in the side portions of the frame, tho end portions of the drum being provided with iiunges i7 between which ure wound convolutions of u supporting rope 1S'. one lend of which is suitably secured to the drum, its other end being adopted to be secured to en over-heed support. l use the term rope to indicate any suitable liexiblo suspending device adapted lo be wound upon thedrulmseid device being of :my suitable motorini, preferably wire strands formed into u wire rope or cord, :tlthough, iil desired7 the purt here termed o rope muy be composed ot' .metal links con* stituting o chain. The drum is of suiiicient length to permit the rope to be wound in n number oi convolutions between the flanges l?, the suspending periy of the rope progress` ing 'from end to end of the drum While the rope is being wound und unwound.

By reference te Figs. 2 und 5, it will be seen that when the suspending portion oi the rope is at the control portion of the drum, or About midway between the iiung'es thereof, the eppiisnce hangs iu u substantially vertical jrmsition. As the suspending` portion of the rope exipronohes either end oit' the drinn, the center oi gravity changes, und therzune is tilted, es indicated in Fig. 5. @The incline- 4tion the drum caused by' the tilting of the ire-ine e tendency to conse the Convoiu- `i et. a tcmfele v 'me sui-spending petien O {liaitely above the drum; sec

d e 20 en wliieli seid tiziveleis in n lire nwn parallel with the exis nel third. springe 2l. 2l. en tie guide at opposite Sides f i'. enel. zitlriniel te be compresse'l ents of traveler tewai'el the llie tliuin. The ttf/vieler is prei ily n. loose pulley lieviti@ e. g'ooife. pee which the snsef. 'Elie iepe, the guide 2Q l ietl :iticed its ends to anie. the mtl extending is ef the t f9.3/ helical Wi' Q0. the ente? tering the Giclee liile tilieii 'muet enfle ere the cenipiessetl swing the et i L eppesing the mevement e; the "tion et the.' rope in the tli'ee thus meinta'nng tlie eeneenteet with eecle other end of tne inclnecl tlfil 30 i en the. i'epe e# in eenteet 'with ythe .lnnge l? at the liigliey eff' tlium, the eenif'elutioe @emmene te iess in the .spending en ine compact e?? the m e? ne drum is insured., e eenvelutions in umiezm pmellel eeuifee ngen 'li the gfeoveil 'i Y means of e.

lmlil ille Tel-tuning3 n with 'the ti'ax'elei ll). willed with linnge (Fig. il) which overlap the Biden et' die retaining pulley 23, :find thus euuse tlie i'etniningg pulley te nieve lengthwise el the drinn with the traveler. Pri vielen llius nniee lim' @penning tlie iemining pulley .from the .:itveler Whenever thi` is; degli able The remining pulle7 :iets te held the rupe in the groeve et the ti'zifelei 19 and keeps itllieie in Fspiie et ille 'facty that 'the 17esistnnce el" the spying 2l to entlwiee nievement el' the traveler sumen tlie rope to be Sometimes delleetefl as sliewn in lfig. 5. Without seine ineens. te so held the rope, the lutter would. be very liuble te slip ont of engagement Willi the traveler when tl'ie latter lielil, lmek by n spring 2l :is shown in Suid lixf. :3. rIlle pulley :ilv ays shifts along '1t-,e `guide intl 2-11. ma the i-:Welei' movee, owing lo the overlapping of the lai'iges of the tive pulleys. :is sneu'n in l? 4j. A further funetion olf tne pulley Q3 is to eoitet with the traveler pulley as e tension on the rope which keeps the cable taut en the (liuin when not in use. This caused by the spiings 26 :,ieting en the erin Q 'te press the pulley 23 against the cable interposed between the pulleys Z3 sind 19, enel tlius prevent endwise between the us 'wire rope coiled closely on e drinn eensstitut-Vs e helical spr .iff lining e constant tendency te expend. i. lis, tendency would enlzi'ige the diameter et the eenvolutiens of the eoil adjacent te the Stfignt Stretch of tie rope, and infleing this would tend to nieve the stieigllt stretch. of rope lengthwise between the pulleys. The pressuie el the pulleys against impe, to the springs 25, iS suineient te prevent this enflwise movement of the repe and enlargement. o1 tlie adjacent. eenvelutlene ei the Coil, when the evce is met in use.

28 Iepiesents an operating shaft jenmeled in the sides of the anal pmvide at its encls 'with cranks 29, whereby en individual suppoited ley the appliance muy rotate the slum/'ft which 39 eeliing with a. laivggei: mim el' te ite shaft.

z'eieresents e 'ratchet alixed 5l affixed to one of the sltles et" the iiitine, anal adapted Q f' une i'etenet., shown by full ig. @et el' wit The traveler is piro-4 lOl) is plfevifled with e Small gear y to the shaft 2 8, sind emeents a pawl pweted at lll tcbrake levers 41 and the ratchet, as shownby dotted lines, said mcanslcomprisin a pin 36 movable in an orifice in one of t e sides 12, and controlled by a spring 37 which pressesthe in against theinner side of the4 awl 33. he pawl is provided with two adiaeent cavities 38 and 39 (Fig. 7 each shaped to t the end of the pin 36. ven the in is engaged with the cavity 39, it locks the pawl 1n engagement with the ratchet. When the pin --is engaged with the cavity 38, it'locks the pawl in a po- ,sition elevated above the ratchet. The pawl is provided with a handle 40 whreby it may be moved to engage either of its cavities with the pin.

41 represents a brake lever pivoted at 42, and provided with a brake shoe 43 of vulcanized ber or other suitable material adapted to bearv on a disk 44 affixed to the shaft 28. 45 represents an auxiliary brake lever pivoted et 47 to the frame, and provided with` a cam face 49 Ibearing on the outer end'porticn of the brake lever 41. A pendent cord or handle may be enga ed with an eye 50 at thev outer end of the ever 45, said handle extending downwardl within reach of the operator, who is enable by pulling the handle to effectively apply the brake shoe to the disk 44, through the compounding of the levers 45 and 41.

5l represents a confining bar attached to the frame and overlapping portions of the 45 to prevent their lat-` eral dis lacement.

The escribed appliance may' be used as a if desired; the compound brake levers enabling a person su ported by the appliance to so regulate his dbscent from an e evated pointthat the descent may be made with entire safety. The auxiliary brake lever 45 is shown 1n Fig. 1 as in its uppermost osition but it may be forced down and held own in operative engagement withthe lever 41 by means of a set screw 52 enga with a tap d ear 53 on the supporting frame, and aring on the-lever- 45'. 54 represents a lock nut engaged with the screw 52.'

4from the ratchet.

The set screw 52 enables a regulated pre'ssure to be constantly applied to the brake shoe 43,.when the appliance is used as a fire escape, the screws1 being adjustable so that the pressure may be adjusted to the load. l

I prefer to maintain a light pressure of the brake shoe on the disk 44 means of a s ring 54,130 prevent backwar rotation of t e drum' when thfvplawl 33 is diseng en a wire rope 1s employed, its convolutions have a tendency to act as a'v spiral spring and rotate the drum ingly holding said ro aged backwardly to a limited extent, thus loosen ing the convolutions on the drum, when the gaging the ro e above the drum and movablelengthwise o the latter, and a roll mounted 1i ht.

Kes

to engage the traveler and to move laterall Y provided for yiel against the ropejto exert tensionon the latter and hold it in engagement with the traveler.

therewlth, means beinlg A n appliance of thev characterstated` comprisin a frame, a drum journaled in bearin t erein, a suspending rope engaged with t e`drum, :mechanism carried by the lframe forv rotating the drum, a traveler engaging the rope above the drum and movabe engthwlse of Athe latter, means for yieldingly resisting the movement of thel traveler toward the end of the drumto prevent the separation of the convolutions of the rope onthe end portions of the drum, and `a yieldingly mounted roll engaging the ltlrieler and movable laterally therewith to o eler and to exert tension on said rope. 3. An appliance'of the character stated comprising a frame, a drum ]ournaled in the rope .1n engagement Ywith the travbearings therein, a suspending ropeengaged with the drum, mechanism carried by lthe frame for rotating theA drum,'a guide to the drum and subabove and adjacent stantially parallel with its axis, a traveler composed of a grooved idle pulley engaged with..the rope and movable onmtheI gu1de,`,- springs supported by the ide at opposite v sldes'ofv the traveler and a aptedto be com- .i

pressedby movements of the latterz aroll -mounted to move toward and from sald; travy eler 'and movable laterally therewith, and.

spring mechanism for holdin contact with the rope to 'hol engagement with the traveler and to exert tension on said-*ro In testimony w signature, in presen@ of two witnesses.'

Said roll in `Witnessesr T F. C.Es'rlr, P. W. Pnzza'rrr.

um c. MoUL'roN;

said rope in l ereof I have aiixed my 'l

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