US1888740A - Automatically extensible and collapsible tray - Google Patents

Description

ing thespeoificationj Patented Nov. 22,- 1 93 2 F emm. STAT HENRY noosyor CINCINNATI, oHIo f YADJUSTA'BLE-SIIIOREV Application filed Marchllfi,

This invention relates to apparatus for forming, concrete floor molds, and particularly to temporary supportssor shores on which the moldsare supported. I g It is frequently desirable to construot one portion of a floor of a thicker slab of concrete than another portion where the thickportion i is" required. to carry a heavier load than the other part. The forms for the mold forthe thick slab are assembled in a lower plane than those for, the thin-slab, with a substantially vertical wall between thein the idifierencexin thickness between the two slabs being varied according tothe difierenoe in the; loads to be carried thereon. r l 1 The principal object of this invention is the provision of;a shore which isisiinple in construction, efficient in use, and adapted to support thefloor forms on oneside ata higher. level than those on the other side. f i Another object ofthe, invention is the pro: vision'of a shore ofthis kind adaptedto su port the floor forms on onefside in a higher plane than thoseon-the other side, said shore being adjustable to vary the-verticahdistance' between saidplanes. f I

Still another obj eot :of

V the invention sag provision of a shoreadapted to support a plurality of floor forms at their; corners,fsaid,

form's others. v l v i V. q

f Tothese and other'ends, the invention'oonjsists in the construction arrangement of parts that will appearffro n'the following description when read in conjunetion with the accompanying drawings, the novel fea-l tures beingpointed'outin the claims followa different horizontal: plane than the In the drawings:- 4 y i Fig. 1 is afmgmentar plan view of afloor mold illustrating 'one embodiment "of the invention; a

Fig.2 is a fragmentary, vertical seotionlof thesame, taken substantially on line2 2 of arrows at said line."

shore being adjustable to support one of said 1 p r p ,1 are substantiallyrectangular 'pr squareT-in f form, and-arebutaway aethei corners to fit r 1930; (Serial no 435,450; a Fig 1 and looking i arrows at saldline s Fig. 3 isase'otion on line line and. showing one of the floor forins "de taehed; I

i Fig. 4 is-a si F ig. 5 isan elevation of the other side of the shore shown in'Fig fi-; i

- 5 Fig." 6'' is a i perspective viewjof an "ad able earriershown in Fi gQ ljl I (F g.7 is aperspective viewo-f another sh'o e shown in Y I Fig.8 is apl'an view of the-same; "Fig, 9 isa perspective view; of -a;carrier shown in Fig. '8- 7 i looking in the direction ofthearrowat'sai' i Fig. 10 isa frontelevation of I modified form of tlie'shore shown in Fig'f l-i 1 I Figffl'l is asideeleva'tion ofthefs'aniejgf,

Fig. 12 is a plan View of theS ll m howing v a'fragnientof a-filoor forrnsupportedthereon and another detaehed therefrom, and

- Fig; 13 is a sectiontaken ion line, 12;-:12of

Fig. ll and looking inthe dire'c'ti n of the Referring specifically I to the drawi 'n which-like refereiioe numerals; refer 5? sameppartsjin thef'seveifalviews, 1 represents r 5 '7 a filolor' iform ofw'ellknowntype: The forms aroundthetop's of shores 2,3 and konfwhich they are supported to forma floor moldl if In' the embodimei t illustrated, the-forms! 1 are assenibled in a lower'plane 'than thef forms 1'. for the purpose of forming-a thick-' sh'own supportedlon each of tl eshores 2f3 i i and 4, those supported on the shores 2 ,;all b-f ing in the same plane,' while two of those supgl portedon the shore aregsupported at a: lower plane than the otheritwo, and onefot n' theidirection I 1 Nov. 22, 1932. K 5, S A MAN v 1,888,740

AUTOMATICALLY EXTENSIBLE AND GOLLAPSIBLE TRAY Filed Jan. 7, 1931 2 Sheets-Sheet Patented Nov. 22, 1932 UNITED STATES PATENT oFFicEf i KARI. osrnnsonauivmn, or

HAMPTON wick, NGL ND AUTOMATICALLY nx'rnnsinrinnnn COLLAPSIBiE TRAYS f r Application filed January 7, 1931, Serial No. 507,204, and in Great Britain September 15, 1930.

' ing and pivoting the latter and the means for keeping the same either in the folded or in the partly or fully extended positions, ready for usein either. An example of a simple way of carrying out the inventionis described and illustrated in the annexed drawings of which Fig. 1 is a perspective view of the tray, Fig. 2 is a perspective view of the tray extended, i g Fig. 3 is an underplan of table folded, Fig. 4 is a section on line 4 4.of Fig. 3, Fig. 5 is a section similar to 4 with the legs beginning to descend, Fig. 6 is a section of tray and table-fully opened. r

The tray-top a is bordered by downwardly depending rimsaflthus providing a h0l-' low space on the underside of the tray. Arranged at each. corner of the tray and with- 33 in the rim a are metal or like brackets b which are spaced away from the rim a as shown in Fig. 3 and are provided with keyhole slots 6 (see Fig. 4.) Arranged transversely across the ends of the tray are pivot 35 spindles a the ends of which are located in the slots b suitable rollers or the like 0 being provided. The spindles a carry at or near their centers hand-loops 0 and the rim A a of the tray is cut away at its ends as at a in order that the hands may be readily placed under the trayto grip the handloops 0 By means of the hand loops 0 the spindles 0 can be caused to recede from one another along the slots 5 against the action of tension springs 72. which are arranged one along each long side of the tray and which are secured at their ends to the ends of the spindles 0 (see Fig. 4). The centerpoints Kg of the tension springs h are secured as at is to the sides of the tray.

a length of wire Z which is secured at itslower ferred to.

arms QZ- to pass finally J nderneath and be- Freely pivoted tothe ends'of thespindles c are cranked arms d secured to the ends of tubes 03 which form the upper parts ofthe legs whenthe tray is converted into a table. The cranked arms al are of the shape shown clearly in Fig. 6,.for a purpose hereinafter described. g

The' tubes cl are telescopically arranged within further tubes 5 which are pivotedas atc at their upper ends to the down-turned ends of brackets f mounted along the sides of an-iundershelf g. Means are provided to prevent the complete withdrawal of the tubes d from the tubes e,.said means comprising end to a pin 6 near the lower end of the tube 6' and at its upper end is provided with a head Z2 arranged within the tube d, this head l in conjunction with the inturnedend d of the tubed serving the purposeabove re- The parts of the device are arranged and operated in the following manner: as a tray, the undershelf g is accommodated in the hollow recess on the underside of the tray top a and in close proximityto the same (see Fig. 4 which showsthe device in, use as a tray) The tubes 03 are telescoped within. the tubes 6 and the tubes 6 are arranged horizontally underthe shelf 9. I It will be seen that '80 in this position the connection between the cranked arms al and the spindles 0 are,ar-.

ranged inside the pivot connections e of the tubes e to the brackets V f carriedby .the' shelf. The pull of the springs It therefore serves to keep the collapsed legs d, e raised and also enables a neat and compact tray to be pro: vided. As 'wil lb'e appreciated on reference to Fig. 3, the two sets of tubes 6 fold up side by ea r desired to convert the tray as yond the pivot point 6 it will also cause the tubes d to beslightly withdrawn from the,

tubes 6 (see Fig. 5) As soon as the handles have been pulled sufficiently to bring the ends of the arms beyond the pivot points 6 the tubes 6 will commenceto fallaboutthe pivot 0 due to their own weight sincethe springs it no longer maintain the same in the raised position. They will then fall until they reach a substantially vertical position, the cranked arms 03 meanwhile pivotmgon thespindles. 0 and the weight of the shelf g I of the tubes (Z together. This drawing to gether' of the upper ends ofthe tubes (Z will cause the legs d and e to slope outwardly as shown in Fig. '6 whereupon the tray a which now forms the table top will be firmly supported. The tubes d just above the upper ends of the tubes 6 are arranged to bite into recesses in the brackets f to give a good grip and a firm stand.

individual requirements. i In order-to collapse the'table and to re- 1 convert-the same into a tray, 1t is merely nec- Of course by releasing the hand-loops 0 before the legs 0?, e are fully extended, the

height of the tray a'may be adjusted to suit essar'yto place the hands'under the rim and to pull the hand-loops 0 This it will'be appreciated will cause the'legs to become vertically disposed, when, with the hand-loops c i still pulled apart, the tubes d can be telescoped-into the tubes 0' by pressure onthe tray a. WVhen the tubes (Z havebeen fully telescoped into the tubes 0 so that the shelf g is arranged in close proximity with the un derside of the tray top, the-handles0 may be released when the springs it will act to swing the tubes 6 up under the tray top and to maintain the same in the raised position asshown in Fig. 4 and as described above/ It will be understood that the return-of the spring-tension at anymome'nt during extending or folding fixes the parts in the position momentarily attained or in other words,-only if the hands are pulling asunder can the furthe:- opening orclosing he proceeded with, which of course permits of the handies't adjustment imaginable.

' Although the example described mentions i spring-'tensiononly, Imay use other forms of controlling the action and maintaining the parts in their desired positions without'devi- I ating 'fI'OmthG invention.

ing transversely across the tray at the under side and near the ends thereof and connected with the tray for in ward and outward movement relative toeach other, yieldabl'e. means tending constantly to move said rods relatively inward, a plurality of legs one at each end of each rod, said legs being pivotedat their upper ends to said rods for movement be-- tween folded positions underlying the tray element and extended tray element supporting positions, members slidably mounted on said legs, and a leg spreader element pivotally connected with said members, whereby the spreader element is movable upwardlyralong the legs to lie closely adjacent to the tray eleinent when the-legs are folded, and down? wardly along said legs when the same are exa I tended to hold the lcwereud portionsof the legs againstboth inward and outwardmova men-t relative to-each other. e 1

2. A combined serving tray and table as setforth in claim 1 in whichrthe legs comprise upper and lower telescopic sections and in which the spreaderelement is 'pivotally connected to the upper ends of the lower leg sections.

' 3. A combined serving tray and table as set forth-in'claim 1 inwhich the pivotal connections between the legs and the rods are located atthefree-ends of angle members which extend first'laterallyfrom the, upper ends of the legs and then downwardly in spaced relation to the legs to permit the members to which the spreader elementis pivoted to be.

moved: across the'rods to dispose the pivots 1 between the" spreader element 'and'said members above and outwardly relative to the rods when the legs are folded, whereby the yieldable connections between the rods serve. to

'hold. the legs against swinging to extended positions when the legshare foldedi o KARL SCHAUMAN.

' What I'claim'as-my invention a'nd desireto 1 seeureby Letters Patent is 1. Acombined serving tray and tablecomprising a tray element,a-pair of rods extend-

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