US629636A - Arch-center. - Google Patents

Description

No. 629,636. Patented July 25, I399.

J. 8. WHITE.

ARCH CENTER.

(Application filed. Max. 10, 1899.)

(No Model.)

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UNIT D STAT S PATENT OFFICE.

JOHN S. WHITE, on NEW YoRK, N. Y,

ARCH-CENTER.

srnciricA'ridn raining part of Letters Patent No. 629,636, dated .T'ui 25, 1899.

' Application filed March 10,1899. SiialNoI 708.520. momma-1 To all whom it may concern I 1 Be it known that 1, JOHN S. \V/HITE, a citizen of the United States, and a resident. of New York, in the countyof New York' and State of New York, have invented certain new and useful Improvements in Temporary Centers for Use inthe Construction of 'Floors of Buildings, of which the following is a specification.

The invention relates to improvements in inafter described, and particularly pointedout in the claims.

Temporary centers are employed as. supports for the concrete or other material filled in between the floor-beams until said concreteor other material becomes sufficiently hardened, this requiring usually but a short period of time, and thereupon the centers are removed and used for a like purpose between other floor-beams. The centers are supported at their ends upon the lower flanges of the floor-beams, which are usually commercial I- beams. In accordance with my invention the centers are made adjustable as to their length, so as to be extended or contracted to meet the conditions of the various spans be tween the floor-beams of a building, and the sections of the centers carry novel locking means, whereby said sections when adjusted may be securelyfastened together. My invention not only enables the adjustment of the center to suit the length of span between the beams, but facilitates the application of the centers to and their removal from the beams and insures theirfirm retention in position during use. In accordance with a portion of my invention I provide means for supporting concrete below the lower flanges of the floor-beams in order that the lower surfaces of said beams may, when desired, be coated with the concrete or other material simultaneously with the formation of the arch between the beams.

. The invention and satisfactory means for carrying the sameinto effect will be fully understood from the detailed description hereinafter presented, reference being had to the accompanying drawings, in which- Figure 1 is a vertical longitudinal section through a temporarycenterembodying a portion of my invention, said section being on the dotted line 2 2 of Fig. 1 and said center being shown in position to form the archbe tween two floor-beams and as supporting the concrete intermediate said beams. Fig' 2 is a bottom view of same} Fig. 3is a View, corresponding with Fig.1, of the center provided at one end with adjustable supports.

Fig.4. 5

is adetached vertical section through a floorbeam andtwo adjoining centers and illustrates the means for covering the lower -sursecuring the sections of the center in their adjusted position.

In the drawings, A A denote the usual floorbeams, of commercial I shape,-and between which is filled in the concrete or other material B.

The center is designated by the letter O,

and its purpose is to temporarily span the space between the beams -A -A'and support the concrete or other materialB until the latter has become sufficiently hardened to admit of theremoval of the center.

The center 0 comprises the sections D E, which overlap one another. at their central portions and are strengthened by the ribs F, whose ends are preferably turned upward to form the feet G, by which the center may be supported from the lower flanges of the I- beams A, as indicated in Figs. 1 and 3. The middle portions of the section D of the center 0 are slotted, as at H, these slots preferably extending through the ribs F, and the corresponding portions of the section E are provided with the ears I, which extend through the slots H of the section D and have pivotally mounted upon them the levers J, which are connected together at their outer ends'by 'means of the bar K and at their inner ends are formed with the eccentrics L, which when the bar Kis turned toward the left from the which eccentrics when the outer ends of the levers J and bar K are turned outward and toward the right to the position illustrated in Figs. 1 and 3 will bear against the ribs F and operate to draw the overlapping portions of the sections D Etogether in order thereby to. lock the sections D E in such adjusted position cat'ed inner end of the levers J is clearly.

shown in Fig. 7. The object of connecting the outer ends of the levers J by means of the bar K is to insure simultaneous movement in said levers J and to enable'me to lock said levers in theirouterposition (shown in Fig. 1-) from a single locking device, which. device in the present instance consists of'the locking-bar M, composed of the pivoted arms N O, the former being pivotally secured at its.

inner end to the ear a or the section E, and thearm O at its inner end being pivotally secured to theouter end of thearm N and at its outer end being bifurcated or forked to pass upon the cross-bar K, connecting the levers J. The arm N'will be formed of the two separated corresponding pieces of metal, between whose inner ends the ear or will be inclosed and between whose outer ends the arm 0 will be pivoted, as shown in Fig. 2, and the arm 0 is provided with the extension Z), carrying a transverse pm at to engage the edges of the arm N when said bar'M is in its extended position, and has its central portions pushed inward toward the right to cause the pivotal point e to pass beyond the center line through the pivot f and cross-bar K- WVhen the levers J are turned to their outward position shown, the bar M, being then free, may be folded, so that the outer forked end of the arm 0 may be conveniently and readily passed upon the transverse bar K, and thereupon the middle portions of the bar M will be pressed inward toward the right to the position illustrated in Figs. 1 and 3, this inward movement of the bar M causing the latter to havean outward wedging action against the levers J and serving not only to firmly press said levers to their outward position and cansing the eccentrics L to bind against the ribs F, but also to carry the pivotal point e inward beyond the normal longitudinal center of the arm M, thereby causing the pin (1 to come into contact with the edges of the arm N and effectually locking the bar M in such position that the pressure exerted against it by the levers J will not be enabled to cause the folding or loosening of the arms N 0. Thus after the levers J have been moved outward to draw the overlapping ends of the sections D E together said levers will be locked in position by the application to the connecting-bar K of the locking-bar M. The levers J are secured to the ears I, which are carried by the section E, and the ear (1., to which the locking-bar M is secured, is likewise secured to the section and heinc'e the levers J and locking-bar M will always preserve their due relation to one another, no matter what the {adjustment of the sections D E uponone another may be. The ear projects through the slot 9 of the middle guide 7t, which is secured to the sectionDand has its slotted end projected over upon the section E. The cars I, projecting through the slots H of the sec-j tion D, and the ear (1, projecting through the slotg of the guide h, constitute efficient means ment with one another and for guidingsaid sections in their longitudinal adjustment upon oneanother. When the sections D E are to belengthened or shortened by being moved from or towardone another, the lovers J will be turned inwardto'ward the left, so as to cease to act as a binding agent drawing the sections together, and aftersaidsections have been given theiradjusted position upon thelower flanges of the I-beams Athe levers J will be turned to their outward locking p0? sition, and the locking-bar M will be applied.

to the cross-bar K and'forced to its locking for preserving thesectionslD E' in due .alineposit-ion, and thereupon the center will be sestrengthening-ribs F, turn upward through recesses in the ends of the sections D E, and hence they may be readily applied to the upper surfaces of the lower flanges of theI- beams A, while the ends of the sections 1) E extend below said flanges, as indicated in the drawings. The sections E or both sections of the center, if preferred, may be prpvided with the wing W for the purpose of permitting the covering with the concrete of the lower surfaces of the I-beams A. The wing W is connectedwith the section E by means of the bolts m, passing through elongatedslots 17., formed in said section E, the purpose of the bolts m and slots 91. being to enable the wing W to have a limited hinged movement and also to be adjusted longitudinally in orderthat the relation of said wing to the lower surfaces of the I-beams may be regulated to suit the conditions to be met. The wing V is preferably composed of strips of sheet metal 'r s, which are slotted and connected by adjusting-screws t. The strips r and s are by means of the screws '15 and the slots through which said screws pass rendered adjustable toward and from one another, and thus the width of the wing, W may be adjusted to suit the width of the I-bcam A and also to aid in regulating the space left between said I-beam and the wing to be filled with the concrete or other material. The inner end of the wing W will be supported upon the section E, and the outer end of the wing \V will preferably IIO I be supported upon the lower projecting end clearly in Fig. 4;.

of the adjacent center,.as illustrated more 'I have illustrated the wing W as applied to one edge of the section E of I the center 0, not deeming it necessary toillus trate the same construction at the lower edge of the section D. The section D may also be, as is apparent, provided with the-wing W, if desired. It will not be necessary to provide the end of the section D with the Wing VV'ifv the next adjoining center to'the right of the section D should be provided with the wing W, since under such arrangement the center adjoining the right-hand'end of thesection D wouldhave the wing W,whose outer edge would rest upon the lowerv projecting-edge of the section .D. .Where'a series of the centers 0 are employed end'to end in a. building, it

will only be necessary for one end of each,

center to be furnished withthe wing W.

The means above explained for'rende'ring the center 0 adjustable to suit the varying spans between the I-beams of a'building will ordinarily'be sufficient; but, .if desired, the centers 0 maybe rendered further adjustable by providing one end of the center with adj ustable feet w, as illustrated in Fig. 3,wherein the center is shown as provided with the inverted rack 00 and supporting guide-rod y, between which rack and guide is arranged the pin P, connected with the lever Q, whose upper end is of claw shape and engages the lower flange of the I-beam A, While the outer end of said lever Q is engaged by one of the links of the chain R, the latter being suspended from the center. The lever Q is adjustable upon the guide-rod y, and hence may be'moved longitudinally along. said rod y and along the rack 0;, so that its foot portion to may be enabled to reach the I-beam A wherever the same may be. When the lever Q is not engaged by the chain B, it may be moved freely along the rack m; but when the foot to of the lever Q has reached the I-beam A said lever Q will have its lower end turned upward toward the right and its pin P brought into engagement with the rack 00, which, in connection with the chain R, by which the lever Q will be locked in position, will prevent the pin P from moving longitudinally, and thereby the foot to will be held in rigid position. Inorder to free the lever Q, it is simply necessary to release the chain It therefrom, and thereupon the lever Q may have its lower end turned downward and toward the left for the purpose of releasing the foot 20 from the I- beam. The lever Q and its connections will be employed when desired to increase the adjustabilityof the center C, but will not'in all cases be necessary, since the adjustment toward or from one another of the sections D E will usually be sufficient.

The method of using the centers made the subject hereof will probably be sufficiently understood from the foregoing description. The center is supported from the lower flanges 'of the I-beams A, and its sections D E may and when adjusted said sections will be locked in position by the-downward and outward movement toward the right of the levers-J and the application to said levers ofv If the lower surfaces of p the locking-bar M.

i the I-beams are to be covered, the wing W will be' adjusted to meet the conditions .re-

quired, and if the lowersurfaces of the I- beams are not to be covered no attention will be paid'to the said wing. If the adjustment of the sections D Etoward one another is not sufficient for the conditions in. hand, a fur-. ther adj ustmentmay besecured by the use,

of the adjustable feet w,'which may of course be at either end of the center,but will not be necessary at both ends of the center. In Fig. 1 I show one end of the centeras being providedwith the wingfVV, and this endof the center should not be provided with the adjustable feet w; but the other end of -the 'center (shown in Fig. 1) may, in lieu of the stationary feet G, be furnishedvwith the adjust able feet w, the latter. for convenience being omittedfrom Fig. land shown in Fig. 3.

' What I claim as my invention, and desire to secure by Letters Patent, is-

1. .The center 0 adapted at its ends to engage the floor-beams of the building and com- I prising the longitudinal sections 'D, E, which overlap and are longitudinallyadjustable on one another and each of which is in the form of a sheet or plate of proper width to directly receive theconcrete or like material to be filled in between saidfloor-beams, combined with means carried by said center for securing together the overlapping face-to-face portions of said sections in their adjusted positions; substantially as and for the purposes set forth,

2. The center 0 adapted at its ends to engage the floor-beams of the building and comprising the longitudinal sections D, E, which overlap and are longitudinally adjustable on one another and each of which is in the form of a sheet or plate of proper width to directly receive the concrete or like material to be filled in between said floor-beams, combined with means for guiding said sections D, E, upon and preserving their alinement with one another, and means carried by the center for securing together the overlapping face-to-face portions of said sections in their adjusted positions; substantially as and for the purposes set forth.

3. The center adapted to engage the floorbeams of a building and comprising the longitudinallyadjustable sections having the ribs and guide, said guide and ribs of one of the sections being slotted to receive ears on the other section, combined with means for locking the sections of the center in their adjusted positions; substantially as set forth.

4. The center adapted to engage the floorbeams of a building and having at its end the wing to pass below the floor-beam, combined with means for adjusting said Winglongitudi'nally on the center; substantially as set forth." it

' 5. The center adapted'toengage:the'flo'orbeams of a building and having at its end the wing to pass below the floor-beam and com posedof the adjustable sections whereby said wing may be adjusted longitudinally; substantially as set forth.- i i a 6. The center adapted to engage the floorbeams of a buildingand cmnprisingthelon gitudinallyadjustable sections, combined with the eccentrics for binding the overlapping ends of said sections together and means for locking said eccentrics in rigid position; substantially as set forth. 1

7. The center adapted to engage the floorbeains'ofa building and comprising thelon gitudinally-adjustable sections, combined with the lever pivotallyse'cured to one section and having the eccentric to bind against the other section, and means for locking said lever in rigid position; substantially as set forth.

8. The center adaptedto engage thefloorbeams of a building and comprisingthe longitudinally-adjustable sections, combined withthe lever pivotally secured to one section 11 a ceases i and having'the eccentric to bind against the other sectionyand the jointed locking-arms N; O, forlocking said leverl in rigid position, one of said arms having the extension I) and pin d; substantially asset forth."

9. Thecenter adapted toengage thefloorA beams of-a building and comprising the 1on gitudinally adjustable 1 sections, combined with the levers pivotally seen red to one section and having the eccentrics to bind against the I other section, the transverse bar connecting said levers, and tliejointed locking-arms N, O, havingthe bifurcatedend to engage said bar for locking both of said levers; substantially as set forth.

10. The center havingat itsend the rack and guide, combined with the'leverhaving the foot and engaging'said'rack,"and the chain for locking said lever; substantially asset forth.

Signed at New York, in the county of New York andState of New York, this 7th day of March, A. D. 1899. l l l l JOHN s. WHITE.

Witnesses:

CHAS. O. GILL, u E. Jos. BELKNAP.

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