US1592157A - Chair for concrete-reenforcing bars - Google Patents

Description

July 13 1926. 1,592,157

J. REYNOLDS ET AL V CHAIR FOR CONCRETE REENFORCING BARS Filed OOt. 6 1924 noentozs Fatented July 13, 1926.

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JAMES REYNOLDS AND JOE-II? "WILSON, 0F CLEVELAND, OHIO.

CHAIR FOR GONCBETE-REENFORCENG BARS.

Application filed October 6, 1924.. Serial No. 741,805.

This invention relates to supports or chairs for concrete reenforcing bars. The general object of the invention is to provide a simple, strong and easily manufactured re enforcing bar support.

It is important in concrete constructions by reason of the necessity for complying with the usual building codes that certain relations between each of the reenforcing bars may be maintained; It has been our experience that a great many supports now used are so made that the bars are not held in their originalposition when subjected to the forces resulting from flowing and tamping the concrete.

Further objects include the-provision of a chair. for supporting reenforcing bars each of which may be formed of bent members engaging each other in such a manner that the chair may easily be put together and in which there will be the least likelihood of the members becoming disengaged while serving to support a reenforcing bar.

Another object of the invention is to provide a support formed of looped rods in which the weight of the bar to be supported will be equalized over. all the legs of the chair. Our invention moreover, contemplates the provision of depending loops on at least one of the members comprising the chair from which the ends of a reenforcing bar may be suspended.

Other objects and features will become apparent in the further description which pertains to the accompanying drawings, wherein wehave illustrated the preferred embodiment of our invention. The essential novel characteristics will be set forth in the claims.

In the'drawings, Fig. 1 is a perspective of our supporting chair; Fig. 2 is a side eleva tion thereof showing a bar in cross section supported thereon; Fig. 3 is a plan view of the top of the chair; Fig. 4 is a cross section as indicated by the lines 4-4 on Figs. 2 and 3; Fig. 5 is a fragmentary side elevation of a modified form of chair; Fig. 6 is a diagrammatic view showing the use of the chair in supporting a conventional form of reenforcing bar or rod.

Referring again to the drawings and designating the various parts by reference characters, it will be seen that the chair consists of we l p d and tm m r n 2,

the free ends of which form the legs 3, 4t, 5 and 6. The legs converge towards the top of the chair to provide for sideward bracing. At the top of the chair each of the members are bent into substantially open loops, that of the memberl being designated 7, and that of the member 2 being in dicated at 8. Each of the loops are bent to form when engaging each other a substantially horizontal table. 7

We do not propose to limit ourselves to the exact formation of these loops, but in the form of the invention shown in the bends are as follows. The loop 7 is formed about as shown in Fig. 3, open as at 9 and with the ends bent downwardly as at 10, Fig. 2 at approximately a right angle. The

closed end of the loop 11, may then be bent upward as shown to form acradle effect when assembled with the other looped memher, though we would consider it within the spirit of our, invention were the loop 7 to be made generally flat and horizontal when assembled.

In forming the loop 8 of the member 2, the closed end 14 is substantially straight for a distance corresponding to that be-' tween the sides of the loop 7 about as shown then rearwardly in a generous loop as shown by the broken lines 15 This loop is preferably bent downwardly to engage the sides of the loop 7 as shown in Figs. 2 and 4. This downturned portion lends stability to the chair by preventing the displacement of one loop relative to the other. The portion 15 may be formed so that a bar B resting on the assembled chair as shown in Fig. 2 rests both on the members forming the loop 7 and the loop 8 whereby the load is substantially equalized over allthe legs. The free ends of the looped member 2 are brought together as at 16 to underlie the slightly raised region 11 of the other loop and bent downwardly as at 17 to form the legs 5 and 6. It is preferable to form the members at 18 so that a substantially horizontal region will be formed at 18 upon which the bridging portion 11 may rest. It is within the spirit of our invention to form a slight depression at this point, to more se curely hold the closed end of the loop 7 in place.

In Fig. 6, we have shown a pair of chairs indicated at C and C resting upon false;

work P which may for illustration be considered as extending between depressions H for the head plate of a column in a concrete building under construction. A trusscd bar or reentorcing member B is shown as supported at its upwardly turned ends upon a raising bar 13 extending transversely oi the member 13 and resting across the chairs.

If desired we may point the ends of the legs as, shown in Fig. 2 at 20 so that when the chairs are placed, these ends may be thrust slightly into the false-work to prevent lateral slipping of the chairs while the concrete is being tamped about the reenforcing members.

In Fig. 5 we have shown a modified construction of chair in which at least one of the loops extend downwardly far enough to receive the end of a rceni orcing bar. Such a construction would be very useful to hold the reeut'orcing bars in exact. position, while the expense of forming the chairs would not be materially increased. The two parts forn'iing the chairs may be very easily put together or taken apart by simply swinging the legs of each member towards each other until the loops are separated, then bodily turning one member with reference to the other a sufiicient distance to allow the loop 8 to be withdrawn through the loop 7. I

It will be seen that we have provided a strong, cheaply manufactured and easily assembled chair for the purpose stated. which may be easily made from rods of sutiicient size or diameter to support the ends of rcent'orcing bars such as are generally user None oi the bends necessary to term the loops are sharp and hence the strength oi the material toru'iing the chair is not impaired.

Having thus described our invention. we claim I l. A chair for supporting reeutorcing bar: formed of two members each having down wardly extending leg portions and each havin; loops, each of the loops having a portion (Wei-lying the other loop to form a support adapted to sustain a weight.

:3. In combination a pair of separate members each having downwardly extending leg portions and loops which engage each other to hold the members together in upright position. one 01 said loops having oppositely disposed stretches depressed from the general plane of said loops to provide a two point cradlelike support for a building menu ber.

3. A reentorciug bar chair comprising in combination a pair of interlocking members adapted to be assembled without distortion and handled separately. said members each having a portion which overlies the other in a substantially horizontal plane, and downwardly extending legs carried by each bling the loops together, each loop terminating in downwardly extending legs disposed at diverging angles.

In a chair for supporting concrete rc enforcing bars. a pair of members formed of ductile material and adapted to engage a floor, a. loop formed in each of the members, said loops being adapted to engage each other to form a rigid support, the closed region of one loop being formed to overlie the open side oi the other loop and one of said loops having a downturned portion adapted to lie adjacent the side of the other loop.

(3. In a chair for supporting concrete bars. a pair of rods adapted to engage a floor, loops formed in each of said rods adapted to interlock to form a rigid support, a portior of each loop being arranged to rest across the other at two points, one of said 100 s having downturned portions adjacent the side oi the other loop whereby the rigidity of the chair is maintained when supporting a bar.

7. In a device of the character described, a pair of looped members having downturnod ends or legs, said loops mutually overlying each other so that a rigid support is formed at the top of the legs, one of said loops having depending port-ion lying adjacent a portion of the other loop to maintain the engagen'ient. the loops having their upper supporting surfaces in sul'istantially the same horizontal plane.

8. In a device of the character described. a pair of looped members, said loops terminating in downwardly extending legs, the loops mutually overlying to form a rigid support at the top of the legs, and one of said loops having a depending region adapt ed to receive and suspend a bar member.

9. In combination, a pair of horizontally disposed looped rods each engaging the other to term a support. each loop overlying the other and said loops having upwardly e. tending humps at the overlying portion whereby a supporting cradle is formed iutermediate the bumps.

10. A chair for supporting concrete reentorcing bars comprising a pair of separable members formed with their upper portions extending inwardly toward each other and each having a portion thereof overlying the other member, the lower portion of each member extending downwardly opposite its overlying portion to form legs to support the chair.

11. A chair for supporting concrete reenforcing bars comprising a pair of disengagably lnterlooking members each having a horizontally disposed supporting portion and a downwardly extending .leg portion, members on each of the horlzontally chsposed ortions arran ed to overlie the other horizontally disposed portion, the overlying JAMES REYNOLDS. JOHN WILSON.

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