US2368502A

US2368502A - Form for casting blocks

Info

Publication number: US2368502A
Application number: US464987A
Authority: US
Inventors: Arthur E Troiel
Original assignee: Individual
Current assignee: Individual
Priority date: 1942-11-09
Filing date: 1942-11-09
Publication date: 1945-01-30
Anticipated expiration: 1962-01-30

Description

Jan. 30, 1945. A. E TRO|EL 2,368,502

FORM FOR CASTING BLOCKS Filed Nov. 9, 1942 /Oj /0' [l @i ff 9 U U I,

. L 23 /f/f` f@ u y u u u f8 i 5 /f A( 1/ [1 /8 /6 I u. u

/V INVENTOR. /4 APT/#UQ E. TQQ/5L Patented Jan. 30,1945

f UNITED 'STATES PATENT OFFICE f 12,368,502". .K

y FORM Fonf'cnsrrmc Broc-Ks l Arthur E.'.Troiel, Berkeley, Calif. y I application-November s,1942,*seria1N0;'464,987

admins.' tores-421) yThisv invention relates to yformsA for casting blocks and particularly toforms for casting `a plurality of cubical or rectangular objects of y identical dimensions. Cubical or rectangular blocks of concrete or other similar material lcapable of being castin forms are useful in many purposessuch as foundation stones or building blocks, -and recently blocks of heavy aggregate concrete have come into use as ballast blocks rfor trimming or balancing large ships. Blocks `of. this kind should be uniform in shape and fdi' mensions vand the forms in which' they aref'cast should be `sufciently. durable to permit them-to be used an' indefinite number of times,y but should be linexpensive in construction, Alight to handle and easy to strip Vfrom the aast blocks after they have set.' ,I

It is the object of the present invention-to'fprovide forms having all 'of the requisites above l mentioned and to provide Vforms for casting cubes or. .similar shapes eiciently and inexpensively and forcasting` them in tiersor groupgwhichv are capable of being easily handledvand transported byappropriate machinery.`

One form `of the presentin'vention is illustrated inthe accompanying drawing fand 1described :in Vdetailin the following specication wherein reference is made to the drawing.

In the drawing: l I f Fig. 1 is a perspective view of oneiendofaset of forms .embodying the present invention and illustrated as set-up forpouringon blocks spre-1 viously cast in the same set' of forms;

Fig. 2 is a side elevationl of one'ofr thewlon gitudinal form plates included in the set shown in Fig. 1; .and

Fig.' 3 is .aside elevation of one of the transverse form plates shown in Fig. `1.

The set of forms illustrated in the dravvin is designed for casting a group of cubical blocks,` the group being three blocks wide and six blocks long. While this is suiiicient to illustrate the structure of the forms and the principles of the invention, it should be understood that any number of blocks may be cast at once depending upon their size and upon convenience in handling the forms. As to convenience in handling,v it has been found that in casting 10%' inch cubical ballast blocks, forms accommodating three blocks in their width and 11 in their length, or 33 blocks in all, are of a convenient size to be eiciently set up and stripped "by no more than two men working without mechanical lifting equipment. I

As illustrated in the drawing, the forms con sist of vertically disposed longitudinall `form plates lilly the details of constructionof which are'- shown in1ig42, and transverse lform plates I!,

one of which' `is illustrated `in Fig. '3.y Both types remainder l of the transverse plates II so that they extend downwardly `a couple of inches, the

lower hedges --of vthe intermediate longitudinal plates being retained in' the grooves by the blocks previouslyy cast, Yand the end .plates and side'glilates overlapping the outer surfaces of thesevblocks to retain the whole form in position.

The: lengths ofV all-the plates depend, of course,

upon 'the -number vofbloclzs to be cast. The longitudinal plates Ill are provided with a plurality -of spaced' vertical slots I3 extending'froin their top edges 'downwardly toward their bottom edges and spaced apart a distancev 'determined by the dimensions of the, blocksto be cast.' The transverse plates II are` provided with similar slots indicatedat'l which extend from theirbottom edgesupwardly. By registeringthe slots inthe two 'types of plates,r they may be assembled in theposition'illustrated in Fig, -1r and there interlocked to form cubical reticules which; serve as forms for the casting of individual blocks. I

. Each end'of every vplate is provided with flangesl such. as indicated at I5 `which serve to back up and support the outermostplates when ythey are assembled; and retain the plates against bulging outwardly due to thevveight of the concrete whichis 'cast injthe forms.

` the flanges I5 areV preferably formed on channellike members "I6 which slide over the outer ends of the'zplate and project beyond the outer walls of' the' assembled form and" which are riveted,

welded, or f otherwise securely fixed thereon; However, on the-'outermost longitudinal plates'I 0,

the flanges I5 are formed as one part of right angular members I1 as in this casethe double flange is unnecessary. The channel-like menibers i6 and the angular membersy I1 are somewhatlighter in construction than they appear in the drawing' where their thickness is exag` gerated. In practice they are preferably formed by bending metal of substantially the same gage as the metal ofI which the forms are made. In

every'case the ends of the plates are provided with .perforations which extend through the n channel members I6 or angle members I1, such perforations being indicated at I8 in the drawing. These perforations provide a convenient purchase'ior a hook vor otherimplement `which may beused in handling the forms and particu lIn most instancesy larly in stripping them after the concrete is set, this stripping being accomplished by sliding the forms upwardly.

In use, the forms are iirst set up over wooden planks such as indicated at I9 or other suitable foundation members and are iilled with concrete which isl screeded ush with the top edges of the forms. The planks I9 in this instance serve as the bottoms of the forms. When this rst level of blocks has set suiiiciently to permit removal of the forms, the transverse form members II are removed. This is accomplished by raising them upwardly, and as all of the forms are preferably sprayed with a lubricant before they are poured and have smooth planar surfaces, they may be withdrawn from their position between the blocks without diiiiculty. After the form members I I have been stripped, the outermost of the longer members I which are then free are set aside and the inner members ID are stripped upwardly but not entirely clear of the blocks previously cast between them. The height of the'longitudinal form members is somewhat greater than the height of the blocks to be cast, as indicated in Fig. 1 where the dotted line 20 shows the position of the top of a set of blocks over which the forms are being assembled. Thus when the central members ID are raised to the proper height for assembling the forms, a couple of inches of their lower edges are still retained in the spaces 2l between the blocks. In order to retain all of the members I 0 at this elevation, they are slotted, as indicated at 22 in Fig.` 2, from their -bottom edges upwardly to receive an elongated pin 2,3 which extends through the slots and which rests on the top surface of the set of blocks previously cast. The pins 23 extend across all of the blocks and through registering slots 22 in all of the plates I 0. With the longitudinal form plates I0 supported in this manner, the intermediate transverse plates il are assembled in place with their lower edges supported just above the spaces 2I which extend transversely of the set of blocks, while the endmost transverse plates which are wider extend downwardly to overlap the previously cast blocks.

The lower edges of all of the longitudinal form plates and the two end transverse plates are thus firmly held by the blocks previously cast. The blocks serve as the bottoms for the forms. It is preferable to place a layer of building paper or similar material on the bottoms of the forms so that in casting a set of blocks,` they will not adhereto the blocks previously cast. This paper is placed over the pins 23 so that when the new batch of concrete is poured it does not embrace the pin which is protected by the paper, but leaves it free to be vwithdrawn and replaced at a higher elevation when the forms are again stripped.

With forms constructed in the manner above described, they may be stripped and replaced at a higher elevation as many times as desired, convenience usually limiting the height of the pile of blocks so cast to 4 or 5 blocks. pile of blocks after being cast constitutes a unit which may be conveniently handled for transportation. Underlying the planks I9 upon which the first layer of blocks is cast are transverse planks such as indicated at 24 which rest upon foundation timbers 25. With this arrangement a conventional lumber carrier which is a motor vehicle with a chassis comprising high spaced frames so that it may be driven over a pile of lumber or the like to straddle the same, may be employed to transport the entire pile, as it may be driven over the pile and is capable of lifting the same for transportation by means of the projecting ends of the planks 24. The forms are easily stripped from between the blocks after the concrete is set by reason of the perforations I8 whichprovide a purchase for one end of a hook, not shown, the other end of which may be connected with a lever, which, fulcrumed on a wooden block resting on top of the concrete casting gives suiiicient leverage to overcome the friction and draw the form plates upwardly. The spaces 2l between the blocks serve to support and retain the form plates in their proper positions as they are moved progressively upwardly in casting successive layers of blocks.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. Forms for casting blocks comprising longitudinal and transverse vertical plates arranged to'provide a plurality of reticules into which concrete may be poured, said longitudinal plates and the .transverse plates at the ends of the forms only extending downwardly beyond the bottom of the casting space, whereby upon upward stripping of the forms their downwardly extending edges will embrace the blocks cast to support the forms for casting a second layer.

2. Forms for casting blocks comprising longitudinal and transverse vvertical plates arranged to provide a plurality of reticules into which concrete may be poured, said longitudinal plates and the transverse plates at the ends of the forms only extending downwardly beyond the bottom of the casting space, whereby upon upward stripping of the forms their downwardly extending edges will embrace the blocks cast to support the forms for casting a second layer, the downwardly extending portions of the longitudinal plates being slotted upwardly to receive supporting pins which rest on the previously cast blocks.

ARTHUR E. TROIEL.

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