US833253A - Wheeled base for portable stands. - Google Patents

Description

No. 833,253. PATENTED 001'. 16, 1906. 0. T. SHAFER.

WHEELED BASE FOR PORTABLE STANDS. APPLICATION IILED 0113. 1905.

Suvantov UMqafRS/zqer;

, UNITED STATES 'rnrnnr orrron.

CHARLES r. SHAFER, or SANTA ANA, canrroanm. assreuoa TO THE WESTERN TOOL AND MANUFACTURE Gr COINIPANY, Oil! SPRKNGFHJLL. OHIO, A CORPORATION ()lllO.

WHEELED BASE/FOR PORTABLE ermine.

No. saaese.

To ail whom it may concern/.- 7

Be it known that 1, CHARLES T. SHAFER, a citizen of the United States, residin" at Santa Ana; in the county of Orange an State of California, have invented certain new and useful Im rovements in Wheeled Bases for Portable tands, of which the following is a specification, reference being had therein to moved, the change from one condition to the other being automatically effected by the usual and natural oaeration of drawing on. or releasing the hand e rovided for the 'urpose of pulling the stan from place to p ace.-

To these ends my invention conslstsin certain novel features which I will now proneed to describe and will then particularly point out in the claims.

In the accompanying drawings, Figure 1 is a side elevation of a structure embodying my invention in one form, the same being shown in its stationary or anchored position. Fig. 2 is a bottom plan view of the same. Fig. 3 is a central longitudinal section showin the arts in osition for. trans ortation. Big. 4 is a detai sectional view taen on a line corresponding to the line cc r of Fig. 2 and looking in the direction of the arrows, but with parts not in inverted position; and Fig. 5 is a detail side elevation of one of the retiree?!- ners oi-the, structurewith the supportingwheel removed.

In the saiddrawings, 1 represents a suit-. able base or platform; which in the present instance I have shown as rovided with a su ortingillari2 and tab e 3, as set forth in otters atent No. 758,779, granted May 3,-

1904, to my assignee, The WesternTooland Manufacturing ,Com any, then known as The Western Man acturing Company, as

' Specification of Letters Patent.

. Application filed October 18, 1905. Serial E0. 282,566.

provide a stand of this character- Patented Oct. 16,1906.

the assignee of Elton E. Remsberg. The base or support 1 is preferably triangular in form, its apex being at the rent of the 1nachine and the machine being supported at the rear on wheels t, which are mounted on machine. The base or support-'1 isfree to to this end sai base is provided with vertical slots 6 in its lateral portions, in which the axle 5 loosely to permit the vertical movement oi the frame and yet maintain'the extending across the lower portion of the slots 6, limit the upward. movement otthe base or support and arevent the axle from dropping out when t ehase or support is lifte The axle 5 is mounted in a fi'ame ccmpris ing a transverse member or eross piece 8 and two rearwardly extending members or arms 9, having journal hearings 10, in winch the axle 5 is mounted to rotate. v l'i 'hezithe' arts are assembled, thearms 9, with. their earings 10,.lie immediately insideoilugs 11, in which the vertical slots 6 are partly located,- which lugs serve to receive the pins 7L. By

,to the ase or support 1. '1 i l The arms 9 extend rearward, are-stated,-

h set crews warrilzk-proecting ends of raising and lowering the front and o the structure the lower ends of these set-screws practically form ivots upon which the base turns.

As rereinbefore stated, the base 1 is verti-f e'ally movable-relatively to the 9:410: 5, and consequently relatively to 'thetyhe'els 4 at the rear of the machine. fiaid bawdspmvided with contactsm'faces 3. hlchywhe move verticall relatively to theaxle 5, and

engagementthereof with theaxle. Pins 7,

I and supportthe rear end of the base or support 1, tl'LlS lsu. port-being efiected in any;

""tend. .g down an axle 5, extending across the back of the reason of the bearings 10 being-thus located the frame in which the. axle Friemounted is held a ainst lateral displacement relatively o. case is provided structure lowered to its stationary or anchored position boa upon the wheels 4 and transfer directly to the periphery of said wheels a sufiicient portion of the weight of the base and the parts supported thereby to act as brakes and prevent said wheels from turning. In the construct-ion shown, in which the wheels 4 are set outside of the body of the base,,the contact-surfaces 1. are carmied by hoods or guards 15, extending laterally outward from the base, on each side thereof, over the wheels 4. When the front end of 43 base is raised, in the manner hereinafter uescribed, to place the a paratus in condition for transportation, tfie contactsurfaces 14 are raised clear of the wheels 4,, and these latter are left free to rotate. The set-screws 13 provide af means for so adjusting the base relativeiy to the wheels that the contact-surfaces 14 will come into proper contact with said wl1eels when the base is lowered, this provision. being particularly advantageous where re structure is built up of castin s, which is t preferred construction, since tiese castings are not always exact in form, and any van s may be readily conpensated for by the u of the set-screws.

The mechanism for raising and lowerin the base is located at the front end thereof,w iere said base is provided with a foot 16, adapted to, rest upon the floor when the structure is in stationary or anchored position and bv its engagement with said floor prevent displacement of the stincture. /Vhere the apparatus is to be used upon a hard floor-such as brick, stone, or ceznen t-the foot 1 6 may have the flat under surlacc shown in Fig. 1,

while a sharp tooth or projection 17, such as' shown in Fig. 2, may be employed when the apparatus is to be used upon a wooden flooror other relatively soft supporting-sun face in order to give the base a better grip upon the same. The raising and lowering mechanism comprises a vertical shaft 13, mounted to slide longitudinally and also to rotate in a bearing 19 on the base 1. This shaft is provided at its lower end with 0. Wheel or roller 20, which forms an alternating supporting contact with the floor at the front end of the structure, the structure being supported by the contact of said roller with the ground wl'icn it is not supported by the contact of the foot 16 with the ground. The operating-handlo J l, by menus cl which the apparatus is drawn from 'pbu-c lo place, is pivota-lly connected to the upper end of the shaft '18 in such a way that said handle may be swung downward and forward, as indicated in Fig. 3, into a convenient position to draw the apparatus along or 'umy be swung back into. substantially upright position, as indicated in Fig. l, where it is out of the way when not in use. The connection between said handle and the shaft 13 is such, however, that said shaft turns in its bearing when the handle iseswung to the right or left, thereby so turning the Wheel or roller 20 as to guide the apparatus during transportation. The construction which I refer for this pin ose is that shown, in which the upper end 0 the shaft is slotted vertically to receive a tonguepiece 22 on the end of the handle 21, the connecting-pivot 23 passin through the two parts of the shaft into w ich it is divided by the slot and through the intermediate tonguepiecc. This latter has an arm or extension 24 extending rearward beyond the shaft, and

havin pivoted to its free end at 25 the up or end 0 a link 26. The lower end of this hnk is pivoted, as indicated at 27, to an arm 28, extendin radiall outward from the upper end of a ey or 1i ting-bar 29, which is fitted to slide in a vertical groove 0r keyway 30 in the shaft 18. This key or lifting-piece is provided with a projection or arm 31-, which also extends radially outward therefrom, being located at the lower end of said key or liftin piece and extending under and engaging with the .under side of the base or platform 1. It will be observed that the lifting-piece 29 is so arranged relatively to the base 1 and its bearing 19 that its terminal arms 28 and 31 contact, respectively, with the up er surface of t e bearing and lower surface of the base, and said lifting-piece being held in such engagement by the shaft 18 thebase must move in unison with the lifting-piece. The vertical movement of the lifting-piece is im arted to it by its connection. through the lin 26 with the arm 24 of the handle 21, the construction being such that when the handle 21 is swung up into the inoperative position (shown in' Fig. 1) the base is so lowered that the foot 16 rests upon the supporting-surface, and when the handle 21 is drawn forward into operative position,'as shown in Fig. 3, the forward end of the base is so raised as to lift the foot 16 clear of the supporting-surface, and the weight of the structure-at this end then rests upon the wheel or roller 20. It will also be observed that the lifting-piece is so connectcd to the shaft 18 as to turn with the same and with the handle when these parts are rw tated to the right-or left in guiding the ap paratus over the supporting-surface during transportation, while said lifting-piece at the same ti me maintains its engagement with the base and its connection with the lifting mechanism in all positions of the )arts.

The shaft 18 is connected with thcframc in which the axle 5 is mounted, and to this end said framccomprisos a forwardl y-extcndlug member 32, preferably in the form of a flat resilicn t bar or spring, so connected to the shaft 18 that this latter is free to swivcl or turn relatively thereto. To this cud said shaft is provided near its lower end above the wheel or roller 20 with a grooved collar 33, and the forward end of the member 32 cugagcs said. grooved collar, so as to maintain under some eironinstanees to hold the structure against movement with the desired firmness. L. Ipreifer to employ these broking contacts, however, as the r serve to further insure the immobility of the structure when in use I do not Wish to be nnderstoodas limiting myself to the precise details of eonstruotion hereinbefore described, and shown in the ao- IT we of the collar, as shown. deration of the preceding deoi be seen that when the parts M llllmlhiOll shown in Fig. l. the strum unsorted upon the foot 16 the int of i inaohine end the Wheels 4 at the of th .d that a. portion of the companying drawings, as it is ohifious 'tiiitt 55E these details may be varied: without-departing from the principle of my invention."

Hsving thus fully described my inyentio'n, what Lel aim as new, and desire toseoure by Letters Patent is- I] '80 l. A portabie stand oompz'ising a base or support provided with efoot 'at'itsfront end sup orting-ti heels at its rear end and means fol oeking said wheels, in combination with a supportin wheel or-roller atth'e front end, end Ineens or lifting said frontend to raise the foot from the supportingeurfaoe andplaoethe load at that endupon the front wheel onroller and to release said locking means, substantially esdesoribed. V

2. A portable stand comprisings base or suppo t ha'ving'a three-point contact with the supporting-surface, the same comprising.-

foot at its front end, adapted to frictions-Hy engage the supportin -surfaoe, supporting 5 Wheels at'its rear end andmeans forlo'c-king said Wheels, in combination with a su port- 'ing heeler roller at. the front en, and means for lifting said front end to raise the foot from the supportingsnrfece and transwe fer the load at that end to the front Wheel or roller and to release said locking means, substantially as described. f

3. A portable stand comprising a base or support provided with a foot at its front end to 5 sup orting-wheels at its rear end and means 'ior ooking said wheels. in combination with a supporting wheel or roller at the frontend,

a pivoted handle whereby the stand may be drawn along, and means actuated by the no swinging of said handle from its upright 01' inoperative position to its forwardly-extending or operative position to lift the front end of the base or support and raise the foot from the supporting-surface and transfer the 1 15 load at that end upon the front Wheel or roller and to release saidloehing means, substantially as described.

4. A portable stand structure presses the contact- H. against the Wheels 4;, so as to set sndpre'vent rototionof theselatter.

nature is their e supported upon or non-rota gsnpportsorpomts iored or'firinl held. stetionery, so .nt aeeidentai displacement and the use of anti tool whichmay be (1 n on the .e a. When it dometers from place to theinere act of gran i -"indie 21, by wiieh to lift the front end of the 1;; the foot 16 from the ground 1 I he Weight at this end upon the I roller lit the same time the 'ees l t ere raised-clear of the strueture pivots upon the set-screws 13, so that these wheels evolve and the entire structure is in the three wheels-to it, the .i'ront endthe Wheels at the 'e may then be readily pim:e being guided by id the front Wheel or roller 20, PGSlidOlf'w reached the the handle will permit a or the striiotnreto drop again, ndle 21 out of the Way, bringing into contact with the floor, taking L lend of? of the front Wheel or roller 20, and applying the brakes to the rear Wheels 4, A ineohine is again anehoredor held 1" to eonstrnct the member of re- ..l for tim reason that when so acts a suppoiling-spring ore is lifted into position for n, the Weigh tresting' on the rear o arms tending to depress these ts the transverse member 8, in; upward on the rear end of member 3?. whiei'i resists this upn'ith a yielding or resilient comprising a base or and having supporting-wheels at its rear end,

in combination with a guiding wheel or roller swiveled in thefront end ofsaid base or support, a." guiding and traction handle connected to said Wheel or roller to turn the some in -1 25 different directions, .said handle being pivoted to swingtr'om an upright or inoperative position to a forwnrdly-extendhig or .ope'ra- I tive position, and mechanism oonnectin said handle and base whereby the front enr l 1 o not s urtnses 14, which act as r Wheels, in ay be dispensed e" e zeiir'ient of the foot 16 with i rsinti'sce suffioientlv effective I support provided with a foot at its front end no in combination with a frame having an axle and supporting-wheels at the rear end of said base or en port, a supporting and guiding wheel or roiier at the front of said base or support, having a vertical steeringshaft swiw eled in the base or support and connected to the frame so as to prevent vertical movement of the front end thereof, said base or support sliding vertically on said steering-shaft at its front end, and engagin the rear axle but free to move vertically rciiatively thereto, and

se ported on said frame at the rear of said ax c, said base or support being provided with contact surfaces which bear upon the wheels to prevent rotation thereof when said base or support is lowered, and a handle connected to said steerin shaft to operate the same andpivoted to swmg in a vertical plane, said hand e being connected to the front end of said base or support so as to raise and lower the same by said swinging movement, the connection between said steeringshaft and frame comprising a grooved collar on said steering-shaft, and a spring-bar engagin said grooved collar at its front end, said spring-bar constitutin a forward extension of the frame which resists the tendency of the frame to tilt upon the axle under the load of the base or en port, substantially as described.

13. A portable stand comprising a base or support provided with a foot at its front end and having downwardly-extending slotted lugs near the rear ends of its sides, in combination with a frame comprising a cross-piece, and rearwardly-extending arms fitting be tween said lugs, an axle mounted in said arms,

support, o i an axle ha ring si extending three said Sh'it" vided with support ,g-wheels a. said base or support iittv'il'l f set ed to hear on the rearwaruly-c and having contact-surfscos wi said Wheels when the base or su ered, a steering-shaft mounted to tically and swivel in the front end '0 or support, having a guiding and s: wheel or roller at its lower end, a collar, and a pivoted guiding ano handle, a spriugdmr extending for the cross-piece of the frame ad i. said grooved collar, and means ear the pivoted'handle and the from c base or'suppoit, whereby the swim, handle on its pivot raises or imt'tlr; end oi the base or suppiii't, suhat described. I

14. in. a portable stand of the i described, the combination, wit

at its ends lying; oulside of 1 port, said base or support heir, movable relatively to Sftlii a? and being provided with been. which extend over said wheels and l tact-surfaces adapted to hear npi Wheels when said base or suppor is iow w; and thereby prevent rotation oi. the :5; substantially as described.

In testimony whereof i ailis: my si g i'iai'i in presence of two witnesses.

Ci'iiliii. T5 Witnesses (lime. Hussein-m,

l'ii'ina'rw J. Foam:

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