US2670773A - Concrete form clamp and anchor holder - Google Patents

Description

March 2, 1954 A l.. AVERY 2,670,773

CONCRETE F'ORM CLAMP AND ANCHOR HOLDER Filed DGO. 18, 1950 Fig 2 22 Fig. 3

4a 48 f8 54 FdwgrdL. Avery [6A/@ LVL-1,) Q INVENTOR.

20 Fig. 4' 22 BY I MH Attorneys Patented Mar. 2, 1954 UNITED STATES OFFICE ATENT Edward L. Avery, Miami, Fla.

Application December 18, 1950, Serial No. 201,303

2 Claims. 1

This invention comprises novel and useful improvements in a clamp and anchor holder and more specifically pertains to a device for retaining a concrete form in position while the concrete is hardening.

The primary object of ythis invention is to provide a clamp for concrete forms which may be adjusted throughout a wide range of positions.

Another object of this invention is to provide a clamp of the foregoing nature which may be reduced in size for compact storage.

A further object of this invention is to provide a clamp having not only the qualities hereinbefore mentioned but also a means for locking the clamp at predetermined positions.

Still another object of this invention is to provide an adjustable clamp for retaining concrete forms which is calibrated throughout its range.

Yet another object of this invention is to pro vide a clamp as previously set forth which con tains a means for holding a raiter anchor in place while the concrete is hardening.

Still other objects of this invention are to be found in a clamp which is simple in construction, eflicient in operation, and inexpensive and easy to construct and maintain.

These, together with various other ancillary objects and features of the invention which will later become apparent as the following description proceeds, are attained by the device, a preferred embodiment of which has been illustrated by way of example only in the accompanying drawings, wherein:

Figure l is a full vertical side view illustrating the clamp while holding a concrete form rigid at a predetermined width;

Figure 2 is a vertical sectional side view taken along the section line 2-2 of Figure l and illustrating the concrete form in a phantom View;

Figure 3 is a top plan view illustrating the invention as seen in Figure l; and,

Figure 4 is a horizontal sectional view taken along the plane of the section line 4-4 of Figure 1.

Referring now more specifically to the accompanying drawings, wherein like numerals designate similar parts throughout the various views, it will be noted that the numeral Il! denotes generally a concrete form constructed of wooden planks I2--I2 or the like and holding therebetween a cement block I4.

The construction of the clamp comprising the present invention consists of a pair of arms I6 are of a suitable length to meet the requirements of the particular clamp desired and may be constructed of pieces of angle iron. Along their lower portions, the inner flanges 20 and 22 of the arms abut the outer surfaces of the planks I2.

At the upper end of the arm I6 and within the angulated portion thereof is welded or secured in some suitable manner, a bushing 24. This bushing 24 further extends through the ange 2i]` thereby protruding slightly toward the other arm I8. Further journaled within the bushing 24 is one end of a screw 26. The other end of a screw 26 is threadedly received within a bushing 23 on the arm I8 and mounted similarly to the bushing 24. At the former mentioned end of the screw 25 and adjacent the outer end of the bushing 24 a cranking handle 30 is secured to the screw and provided to enable turning of the screw.

Disposed slightly above the screw 26 vis a flat bar 32 having its fiat surface directed upwardly and serving as av guide for the screw. With this in mind, the bar 32 is removably but rigidly attached at one end to the arm I6 and extends between the arms above the screw to the arm I8 being slidably received in the latter. Proportionately, a much greater distance below the screw 26 is another flat bar 34. This barA serves also as a guiding member but primarily its function is to provide a uni-directional lock for the clamp. Accordingly, the bar 34 is mounted in a plane perpendicular to that of the bar 32 and has a lower notched edge, denoted generally as 36. Each of the notches, as 38, 40 have a verticalV back surface and a downwardly slanting front surface. The distance between each of the notches, for example 38 and 40, is a predetermined and known quantityand accordingly the bar has imprinted thereon the desired calibration 11umerals, as indicated at 42. As can be seen in Figure 1, the entire bar 34 may be calibrated, depending upon the range and measurements of concrete block I4 to be molded and further, in connection with such calibrations, by making allowance for the thicknesses of the planks I2 of the form I0.

Further, to correspond with the calibrations in the lower bar 34, the upper bar has similar and matching calibrated numerals, as 44 (Fig. 3) ine scribed thereon.

Thus, from the foregoing, it will be evident that as the screw 26 is turned by the handle 30 so as to move the outer arm I8 inwardly, both the bars 32 and 34 will slide therethrough, the lower bar 34 moving and sliding up and down through the slot 46 (Fig. 2) provided in the arm I3. When the desired width between the arms I5 and I8 is noted on either oi the calibrated scales, 42 or 44, turning movement in the rst direction is stopped and if necessary, the handle rotation is reversed whereby the screw will move the arm ES out wardly until a tight abutting engagement exists between the particular notch, as 38, and the slot 4B.

The lower portion of the anges 22 and 20 will then snugly embrace the planks l2 of the form. However, to provide a hanging means for the clamp on the planks and to prevent the clamp from moving downwardly too far, the L-shaped arms are equipped with angulated hooks 48. These members project inwardly between the arms and have downwardly directed bill-portions 50 engageable over the upper edges oi' the planks I2 as shown in Fig. 1.

Still a further refinement is included in the instant invention in a means for holding a rafter anchor 52. Since it is necessary to set or hold the anchor fast in the upper portion of the concrete while the same is hardening a chain 54 is secured to the upper end portion of arm I6. At the free end of the chain is a spring clamp 50. Once the anchor has been embedded in the desired places in the concrete, the springV clamp 5B is opened to engage within its jaws the anchor and hold it against a convenient portion of the bar 34 while the block is hardening.

In the foregoing, it is believed that a clear understanding of the construction, operation and advantages of the device will be quite apparent to those skilled in the art and a more detailed description is accordingly deemed unnecessary. It is to be understood, however, that even though there is herein shown and described a preferred embodiment of the invention, the same is susceptible to certain changes fully comprehended by the spirit of the invention as hereindescribed and the scope of the appended claims.

Having described the invention, what is claimed as new is:

l. A readily and applicable and removable clamp adapted to facilitate holding planks or the like in concrete form relationship comprising a rst elongated angle iron, one flange which is adapted to bear rmly against coacting planks, a hook-equipped bracket secured to an intermediate portion of the remaining flange of said angle iron and projecting inwardly beyond the one flange and adapted to be hung in position on a coacting plank, a second substantially dupli- Y 0 ANumber cate angle iron opposed in spaced parallelism to said nrst named angle iron and provided intermediate its ends with a second complemental hook-equipped bracket adapted to be releasably engaged over a coacting plank, an upper bar having one end rigidly secured to an upper end of the rst named angle iron, said bar extending at right angles to said first named angle iron and passing slidably through a slot provided therefor in the corresponding upper portion of the second named angle iron, a second bar near the same end of the angle iron disposed in spaced parallelism beneath said rst named bar and rigidly joined at one end to said first named angle iron, the opposite end of said second named bar passing through a guide and assembling slot provided therefor in the second named angle iron and adjustably interlockable therewith, an adjusting screw operatively mounted at one end on said rst named angle iron and adjustably connected at its opposite end to the remaining angle iron, said screw occupying the position at right angles to the longitudinal axis of the respective angle irons and being parallel to the upper and lower bars and situated in a position between said upper and lower bars, and a spring clamp flexibly suspended from one of said angle irons and adapted to hold a rafter anchor in position.

2. The structure specified in claim l wherein said upper bar is provided on its upper face with calibrations, said second bar being likewise provided with calibrations and located in close proximity to the positions occupied by the respective hook-equipped brackets.

EDWARD L. AVERY.

References Cited in the iile of this patent UNITED STATES PATENTS Name Date Wilson Aug. 5, 1890 Kirkpatrick Dec. 20, 1910 Wilkes Feb. 2l, 1911 Murray Mar. 1, 1927 Aalberg Feb. 26, 1946 Stevenson May 2l, 1946 Kittas Jan. 16, 1951 FOREIGN PATENTS Country Date Denmark Dec. 5, 1926 Number

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