US1689151A - Concrete-form clamp - Google Patents

Description

oct. 23, 192s. 1,689,151

R. G. MERCER ET AL CONCRETE FORM CLAMP File Sept. l0, 1927 Y INVENTok.

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RUSSELL MERCER AND GEORGE W. MERCER, OF- SAN FRANCISCO, CALIFORNIA.

CONCRETE-FORM CLAMP.

Application filed September 10, 1927. Serial No. 218,702.

This invention relates to improvements in concrete torni clamps. Y l

'l` he principal object or this invention is to provide a form clamp which may be used 5 with the ordinary concrete terms tor the purpose of holding the column form boards to the wall vtoi-1n boards.

Another object is to produce a clamp which may be employed in conjunction with ordinary form boards without altering their customary arrangement.

A 'further object is to produce a device which is economical to manufacture. i

A still further object is to produce a clamp which is capable of various adjustments so as to accommodate columns ot various sizes.

Other objects and advantages will be apparent during the course ot the following descript-ion.

ln the accompanyingdrawings torn'iing a part of this specification and in which like numerals are employed to designate like parts throughout the same, C

Figure 1 is a fragmentary top plan view ot a concrete form showing a column Jform with our clamps applied thereto,

Figure 2 is a side elevation on an enlarged scale on one of the clamp members, and

Figure 3 is an enlarged perspective detail view showing the position the securing element will assume in relation to the form boards.

At the present time in constructing concrete. structures where it is required to place a column in conjunction with the concrete wall, it is necessary to build out 'from the wall or form boards 'for the wall, a projecting form into which the concrete will be placed for casting the column. rlhese projecting forms have been heavily constructed and nailed tight and otherwise secured to the torni boards ot' the wall, which securing operation was a tedious one and also an expensive one.

Applicants have therefore produced a clamp which may be employed in conjunction with the wall boards in such a manner that the form boards for the columns may be quickly and securely fastened and held inl place both before and after the forms have been filled.

Referring to the drawings particularly to Figure 1', it will be noted that the numerals 5 and 6 refer to parallel form boards between which concrete may be poured. These form boards are common in concrete construct-ion. The numerals 7 and 8 refer to form boards which will hereafter be termed the column form boards and talen with the board 9, l'orm an oiset in the mold which otfeet will cast a lprojection upon the .wall 6 in the torni of a plate 11 is provided with a web 18 which is recessed at 14k and has parallel anchor bars 1G extending therefrom.

It will be noted that these anchor bars are secured to the forward edge of the web 13 and have their rear ends in the same plane as the recess portion 141-. This permits the form boards 6 shown in, dotted lines in this ligure to abut the web 13 and to iiev behind the end of the anchor bars, while the recess 14 permits the column board 8 to abut the form boards 6 and to lie between the` plate 12 and the anchor bars 16. As the securing ele-y ments and associated parts are identical on bot-h sides ot' the column, but one set will be described.

Pivotally secured between the anchor plates 16 is a pivoted draw bar 17. rlfhis bar is adapted to pass through a casting 18 and has recesses 19 formed therein, which recesses cooperate with a wedge 1 in such a. manner that when the wedge is moved in one direction it will exert pressure between the draw bar 17 and the casting 18 in such a manner as to move the casting toward the securing element. ln doing this one edge Q2 ot the casting will contact the column board 9 therer by securely clamping the same. As the ar rangement or' the opposite side of the device is identical, the same action will take place.

In order to draw the castings 18 toward each other a cross bar 9.3 is provided, which cross bar has notches 24 formed therein, the notches at the opposite ends being opposed to each other, therefore by the employment ot a wedge 26 upon each side of the device as illustrated in Figure 1, pressure may be brought against both of the cast-ings in such a mann er as to move them toward each other thereby further clamping the form board 9.

It is understood that the clamping menibers 18 have slideways therethrough 'through which the draw .bars and cross rod have a sliding engagement.

It Will thus be seen that We have produced a device which will accomplish all of the objects above set forth.

It is to be understood that the. form or' our invent-ion herewith shown and described is to be taken as a preferred example of the same and that various changes relative to t-he material, size, shape and arrangement of parts may be resorted to Without departing from the spirit of the invention or the scope of the subjoined claims.

' Having thus described our invention, We claim 1.7In a device of the character described, a securing element adapted to be retained in contact With the form boards of a concrete form, anchor bars formed integral with said securing element, a draw bar pivoted to said anchor bars and a clamping element carried by said draw bar Jfor the purpose specified.

2. In a device of the character described, a securing ele-ment comprising a` plate having angularly disposed sides, a Web carried by one of said sides, anchoring` means carried by said Web, a draw bar secured to said anchoring means and a. slidable member movble on said draw bar for the purpose speci- In a device of the character described, a

*securing element comprising a` plate having tures.

RUSSELL G. MERCER. GEORGE W. MERCER.

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