US1468316A - Mold for concrete floor beams of greenhouse benches - Google Patents

Description

Sept. 18,1923. 4 3

. F. J. MEAD MOLD FOR CONCRETE FLOOR BEAMS OF GREENHOUSE BENCHES Filed April 29, 1921 following is a specification.

Patented Sept. l8,

i r winders l d-TEN??? FRED J. MEAD, or NEWARK, NEW JERSEY.

' MOLD son concnn'rn Freon BEAMS or, GREENHOUSE nmrcnns.

Application filed April 29, 1821. Serial No. 465,490.

To all whom it may concern.

Be it known that I, FRED J. MEAD, a citi zen of the United States, and a resident of Newark, county of Essex, and State of New Jersey, have invented a new and useful Improvement in Molds for Concrete Floor Beams of Greenhouse Benches, of which the Myinvention relates to mold for making concrete beams for greenhouse benches. Without being limited to such use, the mold of the present invention is especially adapt,- ed for makingconcrete' floor beams with beveled sides. suchas are shown and described in my patent for greenhouse bench, No. 1,2965%, of Mar. 11th, 1919.

According to my invention the mold for the concrete fioor beam is provided with a removable bottom member or pallet, by means of which the floor beam. of molded concrete, after being formed and allowed to set for a short interval, can be lifted'out of the mold-and set away on its palletin order to complete the setting of the concrete, and by having aconsiderable number of these pallets it becomes possible to make practically continuous use of the molds, so that operations can be carried on in an efficient and comparatively rapid manner.

The pallet is preferably formed from sheet steel and is provided with longitudinally extending flanges on its opposite sides which serve bothas legs for the pallet and provide room therebeneath for access in lifting the pallet and the beam in place thereon, and also serve to give the pallet substantially the rigidity of a girder and to prevent flexing or bending of the pallet when in use and subjected to. the weightof the concrete.

7 ln the-accompanying drawings. Fig. 1 is a perspective view with parts broken. away of one form ofmold embodying my invention.' Fig. 2 is a perspective view of one of r [the concrete beams upon its pallet,- and Fig.

. 3 is a longitudinalcross sectional view taken on a plane'indicated by the line 3 3. Fig. 1.

The mold is indicated generally by ref-.

erence character 10 and comprises a pair of angle iron sills 11 arranged parallel to one another; and crossconnected by channel ' members 12, 12. These channel members,

are of generall inverted V-form and com prise a narrow upper web '13, downwardly extending'and diverging side portions 14, 14 and laterally extending flanges 15, 15

which are secured to the angle bars 11, 11, as by means of rivetslti, As many auxiliary sill members 11 as may be required to give the necessary rigidity to the structure may be provided intermediate the end sill members 11, 11 and same are preferably arranged parallel thereto. One such intermediate sill member 11 is shown in Fig. 1.

The number of channel bars 12 is one greater than the number of concrete beams to be formed within the mold structure. In the form illustrated four of the channel bars 12ers shown, making provision for the construction of three of the concrete beams at the same time, but the number of mold cavities 17 and of channels 12 may be varied to meet the requirements encountered under various conditions. A. mold structure to be operatedby two men working together may conveniently contain seven of the mold spaces 17, permitting that number of concrete beams to be made atone time.

The pallets or false bottoms for the molds are indicated generally by the reference character 18. and same are preferably made from a single piece of sheet metal, com prising a floor 19 and a pair of downwardly extending flanges 20, 20 which. as already stated, serve as legs for the pallet, permitting ready insertion of the operators hands or devices to lift the pallet and the mold beam, and also'serve to give the pallet a rigid or girder-like structure and prevent any bending or deflection thereof when subjected to theweight of the concrete. The flange members 20, 20 are turned inwardly at an angle which is substantially the complement of the angle made by the adjacent sides 1a of the channel. members 12 with the angle iron sill 11, so that when the pallet 18 is put in place within the cavity 17 in the mold member, as shown at the left in'Fig. 1. side flanges 20, 20 lie closely against said side walls 14-. 14 and prevent entry of concrete therebetween. This affords an extremely firm and rigid mold structure and effectively prevents the mold structure from becoming distorted or out of shape in use, as for example, when concrete is being tainped into place or when masses of concrete are shoveled or dumped upon the mold structure.

. 22 may be rcmovably secured in place in any desired way, and in the form shown, I have illustrated for this purpose a pair of turn buttons .24, 2a for this purpose. Bolts 25 are passed through openings in the angle iron sill 11 and in the turn buttons 2%, 2d, anduving nuts 26 screwed on the bolts 25 permit the turn buttons 2a to be secured in upright position,,as shown in Fig. 3 and at the right hand part of Fig. 1, or by loosening 'theiwing nuts 26, the turn buttons 24; may be turned down to the, position shown at the left hand in Fig. 1. In order to properly locate the mold end pieces 2 with respect to the remainder of the mold structure same arepreferably provided with the tapered blocks 22, on their inner sides, which are adapted to lit within the hollow portions oi the channel members 12.

As is pointed out in my patent above referredto, the concrete floor beams for the greenhouse benches are preferably provided with reenforcing members projecting longitudinally beyond the. end of the floor beams, and laterally displaced with respect to one another, so that when the completed floor beams are, arranged end to end in the construction of the greenhouse bench, these projecting reenforcing members will pass one another, and there is thereby provided between the ends of the concrete portions of the floor members a space which can be filled with cementitious material, serving to complete. the floor of the greenhouse bench and to secure the floor beams together. These reenforcing members may. have the form of rods 27, 27 received loosely in openings 28 within the mold end pieces 22. The portions 29. thereof project from one end of the completed. floor beams, as clearly shown in Fig. 3, and those at the opposite end. are spaced somewhat ifurther apart,. as will be clear from the. showing in Fig. 1.

To use the mold, as many of the pallets 18 as there are mold spaces in the mold structure are placed within the skeletonmold structure in the positionishown at the left hand part. of Fig. 1, and the end pieces 22 are put in place and. the turn buttons 2% turned to upright positionand fastened by wingnuts 26. Recntorcing bars 27 of the properlength are put into place, being sup ported by being received in the holes 28 in the mold end pieces 22. The concrete is then shovel-led or dumped upon the mold structure and the mold spaces 17 are filled therewith, the concrete being spread over and levelled ofi, much as in the case ofmakthe time while one set ottloor a section of sidewalk; the levelling oil being on the plane which includes the upper edges 23 of the end pieces 22 and the top portions 13 of the channel bars 12.

Care is taken to see that the amount of water used in mixing the concrete is not unduly greatand under such circuu'istances the concrete beams formed within the mold spaces 17 will be, found to haveset suiticiently within the space of a couple of hours or so. so that they may he lifted outot the mold and set away, leaving'the mold tree for further use. As will be seen, the mold is so constructed as to permit this to be done without injury to the relatively fresh concrete. it being only necessary to loosen the thumb nuts 26, turn turnbuttons 2a to down position and remove the mold end pieces 22 nhich have been thereby freed, it being understood that the openings 28 are suiticiently large to give the projecting portions 7 ol the reentorcemcnts 27 slight clearance andprevent any binding of any suchreenforcing men'ibers in theseopeningsf The eudpieces 22 having been remove'chthe concrete 'l'loor beams are lifted by lifting pressure applied to the pallets '18 and due to the clearance provided by the downward and inward. taper of the. mold sections 17, the concrete floor beams are entirely freed from the mold by the first slight upward lifting of the pallet 18.

Additional pallets 18are now placed in p the skeleton mold structure and the operations which have. just been described can be repeated indefinitely. With a mold structure arranged for the simultaneous formation of say seven of the concrete floor beams,

it is possible to make efficient use of the time of two operators who can make use of beams is being permitted to set .to be mixing a batch of. concrete for a subsequent molding opera- .tion.

It will be seen that the apparatus described is substantial and "rigid, and can be.

readily and cheaply produced and is portable and well adapted Tor the efficient production of concrete floor beams for greenhouse benches which are of uniform dimensions and readily assembled together.

It is to be understood that changes. and modifications may he resorted to Wit-hin'the scope of my claims without departing from' my invention or sacrificing the advantages thereof. i

I claim:

1. rln a mold structure for making'com crete floor beams for greenhouse benches, a sheet metal mold having outwardly tapering sidesand inwardly extending: bottom flanges, and a ren'iovable bottom pallet of sheet metal having downwardly extending side flanges integral therewith and adaptedto be re ceived between the s1de members and supported by its side flanges resting upon the bottom flanges of the side members.

2. In a mold structure for making concrete floor beams for greenhouse benches, a mold having sides tapering upwardly and outwardly, a removable bottom pallet therefor provided with legs, and removable mold end ieces having apertures for receiving reentorces for a floor beam molded within the mold cavity.

3. In a mold structure for making concrete floor beams for greenhouse benches, a series of parallel channel bars of substantially inverted V-form providing mold cavities therebetWeen, and a series of bottom pallets for the mold cavities having side flanges adapted to rest snugly against the tapering sidesof the channel bars.

: a. In a mold structure for making concrete floor beams for greenhouse benches, end sills, a series of inverted substantially V- shaped channel bars extending transversely of the said sills and leaving a portion of the sills pro ecting beyond their ends, mold end buttons pieces on the projecting portions of the sills and havin blocks adapted to enter the openings Within the channel bars, means on the sills for clamping said end pieces removably in place, and removable bottom pallets adapted to be placed between the channel bars.

5. In amold structure for making concrete floor beams for greenhouse benches, a pair of sills, a plurality of inverted substantially V-shaped channel bars arranged transersely of the sills and spaced inwardly from the outer ends of the sills, mold end pieces adapted to be received and supported on the projecting portions of the sills, turnon the sills for clamping the end pieces removably in of sheet metal bottom pallets having flanges extending inwardly on an angle to fit snugly against the adjacent sides of the channel bars.

In testimony that I claim the foregoing, I have signed my name hereto.

FRED J. MEAD.

place, and a plurality-

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