US1728233A

US1728233A - Hoisting mechanism

Info

Publication number: US1728233A
Application number: US220810A
Authority: US
Inventors: William R Edmister
Original assignee: CAPITAL LIFT AND Manufacturing CO
Current assignee: CAPITAL LIFT AND Manufacturing Co
Priority date: 1927-09-20
Filing date: 1927-09-20
Publication date: 1929-09-17
Anticipated expiration: 1946-09-17

Description

Sept 17, 192.9- W. R. EDMISTER 1,728,233

HOISTING MECHANSM Filed Sept. 20, 1927 E Qd,

2 shwrs-sheet 1 Il I'l' g1 .7..

alito: mi

Sept. 1.7, 1929. W R EDMISTER 1,728,233

I HOISTING MECHANISM Filed Sept. 20. 1927 2 Sheets-Sheet 2 il O ythe door structure generally.

Patented Sept.` 17, 1929r u iTlEo s'rAiifefs WILLIAM R.

noisrriivc- MEGHANISM rAiENT clerics y EDMISTER, or coLUiviBns, oiiio, lasslernen Torri-iii carirannirr inn MFG. co., or conoiinans,v OHIO, n ooitroiiarionor oiiio Application led September 20, 1927. Serial No. 220,810.

This invention relates broadly to improvements in hoisting or lifting mechanisms and with regard to the rmore specific features thereofflias particular application to hoisting devices ofthe kind used in connection with cellar and basement doorways for eectingthe elevation of refuse or other `materials from the floor of a cellar or basement to a higher or street level. f

An outstanding object of the present invention resides in .providing swinging cellar doors of the `type used in opening or closing sidewalk cellar shafts with a fold- 'fable frame structure "upon which is carvwhereby when the doors are closed the frame structure may be collapsed to assume a folded positionsuspended `from the under `side of the doorsxinorder that the mechanism will be out of the 'way and free from the fioor surface of the cellar or basement immediately beneath the doors and at the bottom of the'shaft. i f

Hoisting -devices of'this character heretofore in usehave been formed to include supportingframes mounted directly upon the ioor of the shaft and independently of As a result a ,double installation expense has been involved, first, the mounting and cutting of the door structure at theitop of the shaft and second the mounting and setting of the hoisting mechanismen and inthe shaft and its floor. Further, engineering calculations have been necessary to adapt such frame structures to shafts of varying height and as a result of thisy considerable expense is involved in such installation and many errors due to the lack of properly supplied engineering data.

In accordance with the present yinvention the hoisting mechanism is mounted directly on the swinging doors and their associated supporting frame and therefore the installation expense islimited merely `to theproper i the hoisting drum,

setting fof the, swinging vdoors and their frame, which is present in allcases whether thek hoistingfmechanism is provided or not. Again, the present invention permits the door and hoisting` mechanism to be supplied as a unit and renders the mechanism independent ofthe `depth of the shaftor open- -f ing in which the mechanism is mounted.

With .these and other objects 4in view,` as

will appear as the description proceeds, thek yinvention consists in 1the novel features of construction, combinations ofelements and arrangements ofy partsy hereinafter to be more'fullydescribed and pointed outin the appendedk claims.` i L i In the accompanying drawings: y rliigurel is ai view in side relevation of the improved ,hoisting mechanism `comprising the presentinvention illustrating the same .mounted in connection with the :swinging f fdoors of a cellar shaft waypthe doors `being disclosed in vertical section, C f l Figure 2 is asimilar viewdisclosing the frame ystucture of ther yhoisting mechanism` in a partly folded position,

f #Figure 3 is similar view `.disclosing the f framestructure inits fully folded position fr andthe associa-ted doors in their closed position,

Figure' 4 is aviewiin front elevation of 'Figure' 5 isa top plan view thereof, y

l j Figure 6 is a side elevation of said hoisting drum looking toward the `reverse side, thereof as regards' the showing in Figure 1,

vFigure 7l is a fragmentary end elevation of'the upper end ofthe hoisting mecha.-

nism. i n f .y i

Referring more particularly to the drawings the numeral l'y designates the hoisting mechanism comprisingv the` present invention inJ its entirety'. This mechanism` is mounted in 'connection with the ordinary swinging idoorspemployed for vcovering the uppery end of acellar shaftkway.' These doors areindicatedby the numeral 2 2 and have their outer' edges providedwithbrackets3 which rotatably engage transversely extending shafts 4 mounted in connectionwth a structural steel frame 5. `This frame opened the sameswing through an ,angler of slightly more than 90 degrees so that said doors by engaging with the frame will tend automatically to maintain themselves in open positions as is customary jin structures of this class. e f' The doors 2 are united by means ot chains V9 having their end linksV connectedr wit-li eyes 10 lixed to the doors, theV chains 9 serving to equalize the stresses and strainsfoii the doors when the latter are open. YVhen openedthe Y doors-are uitherbracedby means of pivoted vbraces `ll and 12,'t-he former having its upper Vend pivotallyconnected as at 13 'to the door xon `which ltliejhoisting mechanism is .riveted yor otherwise rigidlyfsecured to one of f the vdoor `sections 2,V androtatably'mounted mountedfand the lower part thereof slides "through a strap guide 14,*and` has its lower Send connected with a cable 15', the'latte'r being trained over pulleys 16 mounted in connection withtlie'fra'nie 5, the depending portion of 'the cable having fastened. thereto a weight' structure 17, which serves as a counterbalance to facilitatethe raising and loweringl of the door section Ion which the hoisting mechanism is mountehv permitting Vsaid door sections to be .readily7 raised and low- Vered' by hand. Afpin 18 passes transversely 'through' aligned lopenings provided inthe strap guide 14 land Vis employed to lock the door sections on which ythe hoisting' imechanism is mounted in its open position. The

pin 18 is readily removable, however, toalvlow free movement on the part ot said door sections. The 'ends ofthe guides y14 are Yprovided with rollers to facilitate -the sliding movement of vthe brace 11; 'The bracek12 is vpivoted as at '19 'to the door sectionA which "isfunweighted, andflias its lower end provided'with a recess Vwhich receives a fixed stud 20 provided on theframe 5, and which serves to positivelymaintain the unweiglited door section in its open position and to perlinit ofthe functioning of 'the chains 9.

,Thehoisting mechanism comprises a trame orinedftoinclude astanchion 2l, which is uponthe outer or'upp'erendof the Astanchion *structureis open,isz-capableof ,turning about f 21 is adrumfraine 22,1whichwhen the Adoor a substantially vertical axis. lPivotally Vconnected yto theupper vror outer fpart of the drum frame 22fi's rthe lower Vsection 23 of a itnldablegmast 24. The section-23 includes aivaeasa e laterally bent lower end which, when the mast is elevated, rests upon an angle bar 25 fastened to the upper portion of the drum frame. Adjacent to this laterally bent portion of the frame section 23 is a pivoted link 26, lia-vingr a recess formed in its outer or free end.A This recess kengages with tlie horizontal leg of the angle 25 to hold the section 23 of the mast inthe elevated position shown in Figure l and to resist theV weight applied thereto when hoisting isV being done.

Pivotally connected with the upper or outer end of the section 23 as at 27 is the upper or out-er section "27of the mast. This section includes a pair of bars which are bent to substantially ball form, as shown in Figure l. The adjacent bars 0f the

sections

23 and 27 are provided with registering openings for vthe reception 'of a' removable pin28. The

openings in which the pin 28 is received are arranged onoppositelsides of the. pivotal connectionbetween the mast sections in order that 'the pin mayy function vfor the purpose ot locking the sectionsV against movement in both their open and closed positions. see Figures l and 3. The pin 28 is attached to al chain y29 iwhich prevents the same from becoming accidentally' lost or misplaced;

The druinframe 22 comprises `a rotatable' :shaft 30, which `is jonrnaledintlie side plate of tlie traine. This shaft is revolved manually by means of a crank 31, although'it isy in the scope of tlie present invention to employ motor driven means for revolving the sliatt-30 it' desired. The shaft 30 is provided with a pinion 32,which meshes with a gear 33 arranged on a drum shaft-34,V the latter being journaled in the hoist frame immediately below vthe c'shaft Y30. Rotatable wit-h ,the shaft 34 is a drum 35, around which is wrappedand secured a hoisting cable 36.

This cable kpasses upwardly and istrained aboiitvfa guide slieave 37 slidabl)7 mounted on the shaft 30. From the sheaveV 37 the cable is trained upwardly yand is passed around a Iguide pulley 38 carriedby thek upper'` section 27 not the toldable ymast Froml the pulley'SS-the cable is trained around a slieave wheel I39 located at the extreme outer end of kthe section 27, and from this pointlthe cable drops downwardly and vhas rits-outer or lower end provided with a hook 40, which is adaptedk to engage ya lifting bail k4lfprovided upon an ash container 42. Byitliis construction rit will be observed that -when :the

crank y3l is rotated `motion .will be imparted to the driiin Vsolas to wind tliefcable 36 Vthereabout, thus shortening the yeffective lengthnot said cable and permitting of the raising of the container 42 to adesired horillO zent-al level. The shaft v30 has its end ,oppo- I the lowering of the container', however, the dog 44 is raised to clear the teeth of the wheel 43 so as to permit the container to drop under the action of gravity. The descent of the container, however, is governed by means of -a friction strap 45, which fastens around `a yoperative position and collapsed or folded when the closure assumes a shut position so as to be out of the way and to .require but a minimum of storage space. The construeh tion has the advantage of beingr readily adaptable to cellar or basement shafts of any height, and may be installed unitarily and simultaneously with the associated door structure so as to minimize installation cost. The device possesses conside `able mechanical strength and is fully capable of withstanding the stresses and strains incident to the service which it is intended to perform.

What is claimed is:

l. In mechanism of the character dcscribed, the combination with a sidewalk frame, a door pivotally mounted in said frame and arranged for vertical swinging movement through an arc in excess of 90, an angularly formed stanchion fastened at one end to the under side of said door and so disposed that the free upper portion of said( stanchion is vertical when said door is fully opened, a hoisting mechanism carried by said stanchion, a brace pivotally connected at one end to said door, means for locking said brace to said frame to positively retain said door in its opened position. and means cooperating,r with the other end of said brace to counterbalance the weight of the mechanism carried by said door.

2. In mechanism of the character described, the combination with a sidewalk door structure includingr a frame provided with a pair of doors, downwardly extending brackets carried by each of said doors near their outer ends, pivotal connections between said brackets and said frame so as to permit each of said doors when fully opened to move through an arc in excess of 90 and to eX- tend upwardly and outwardly, an angularly formed stanchion fastened at one end to the under side of one of said doors and so disposed that the free portion of said stanchion is vertical and positioned to one side of the opening covered by said door structure when said door is fully opened, hoisting mechanism carried by said stanchion, a brace pivotally connected at one end to the under side of said door carrying said stanchion and slidably received in said frame, means for locking said brace to said frame to positively secure said door when in an open position p against movement, and means operating against the other end of said brace to coun` terbalance the weight of the mechanism carriedr by said door.

In testimony whereof I afiiX my signature.

WILLIAM R, EDMISTER.