US1566377A - Clamping device - Google Patents

Description

Dec. 22 1925 A. CURRENTE CLAMPING DEVICE Filed July 12524 IN VEN TOR Patented E2, 1925.

ANTONIO onnnnnrn, or W-EsT- NEW- YORK, NEW JERSEY:

GLAMPING DEVICE.

Application-filed July 23, 1924. Serial No. 727,692.

To aZZ whom it may concern:

Be it known that I, AN'roNio GURRENTE, a citizen of the United States of America, residing at West New York, county of Hudson, State of New Jersey, have invented a new and useful Clamping Device, of which the fol owing is a specification.

My invention relates to clamps, and isv especially suitable in. clamping forms for concrete columns.

Themain object of theinvention is to pro vide a clamp which may be quickly applied to forms of various sizes whether of square or other cross-section, and means for quickly and easily tightening the clamp and for holding it in place.

Another object is to provide a more or less unitary clamp from which there are no parts to get lost, so that the clamp will always be ready for use.

Fig. 1 is a perspective of a pair of clamps constructed according to the invention holding a form for a concrete column.

Fig. 2 is a fragmentary sectional view on a larger scale of the .parts shown in Fig, 1, and

Fig. 3 is a perspective of a key for tightening the clamps against the form.

Each clamp consists of two long thin metal strips 1 and 2 pivotally connected near their ends as by the pin or rivet 3. The strips 1 and 2 are each perforated throughout their length by one or more rowsrof equally spaced holes 4. Preferably two rows of holes in staggered relationship are provided, the holes being somewhat closer together than shown in the drawings so as to give a fine adjustment to the size of the form or other object to be clamped. The clamps are shown attached to a form consisting of four separate sides 5 of approximately equal width, such as would be used for a column of square cross-section, but it will be obvious that forms of other cross section could be clamped equally well. A lug 6 of strip stock similar to that composing the strips 1 and 2 has the laterally offset portions 7 and 8. The portion 8 is made just long enough to provide a firm supporting surface for attachment to one of the strips 1 or 2 and has perforations capable of registering with those in either of the strips. The offset of lug 6 is approximately equal to the thickness of the strips so that the strip 1 and lug portion 7 of one clamp may readily receive the strip 2 of bolts and nuts 9.

another clamp. While the lug may be of about the same length as the strips and permanently secured to. one of, them, for

economy of manufactureI prefer to make it considerably shorter than the strips and toremovably connectit to its strip as by the hen it is desired touse v the clamps on forms for different sized;

. columns. the lugs may .be ..detached. and reset in accordancewith the size of-the formsto,

be clamped,

In. clamping the forms two lugsarefirst secured preferably one to each strip 1 of twocijamps, butinsomecases it may be desirable to securelugsto both strips of the sameclamp. and to omit lugs from the other clamp or even to. omit the lugs entirely.v The sides of the form: are next assembled and two clamps set to embrace opposite corners.

of the form, one. strip of each'clamp, ex tending through the bifurcation formed by the lug on the cooperating stripfof theiother ciamp. To tighten the ,clampsl providea key comprising as shown in Fig. 3 a long arm 10 and a short curved arm 11 with a pin 12. extendingthrough the .junction of the two arms and a. rounded portion 13 atthe end. of;the arm. 11. I curve the short-arm 11 so that the pin 12 may be inserted in a perforation in one of the strips somewhat removed from the edge of the crossing strip thus leaving the nearest perforation let unobstructed by the key. Pulling arm 10 in the direction indicated by the arrow in Figure 2 will tighten the clamp against the form 5 to any desired degree until some hole such as 14 is just clear of the strip 1. To hold the tightened clamp in position I provide two tapered pins 15 and 16, one of which may be inserted through the first perforation in each strip beyond the edge of the intersecting strip. When lug 6 is used one of the pins passes through registering perforations in both the lug and its associated strip. I prefer to yieldably but permanently secure the pins 15 and 16 as by a chain 18 to a flange 17 on the free end of lug 6 so that the pins will always be at hand when the clamps are to be placed on a form.

The purpose of extending the pin 12 and pressure member 13 in both directions from the body of the key is to permit the key to be applied to the strip from above or below and with either face next to the strip as may be more convenient.

Clamps constructed according to my invention are obviously very cheap to manufacture, can be made strong and light, have no parts to wear out, and none to get lost so that quick erection and taking down of forms is assured. Various changes in details may of course he made Without departint from the scope of my invention.

l. claim:

1. A clamp for forms and the like comprising two pivotally connected strips, each having a number of spaced transverse holes therethrough, and a lug carri d by one of the strips and having offset ends, each supplied with holes to register with those in the strip so that one of said ends may be tached to one of said strips by means passing through registering holes and there if; positioning the other end along the adjacent strip with the corresponding holes in register and spaced from the strip sulfr ciently for another strip to be placed therebetween.

2. A clamp for forms and the like com prising two strips of suitable length loosely connected together at their ends and each having a plurality of rows of spaced staggered perforations, a lug having two approximately parallel portions offset from each other the thickness of one of said strips, both portions having perforations to regiswith those in the strips and one portion heing bolted to one of the strips, and a pair of pins to the perforations and having flexible connections with the lug.

3. A clamp for forms and the like comprising two strips of approximately equal length loosely riveted together at their ends and each having two rows of equally spaced staggered perforations, a lug having two approximately parallel port-ions laterally offset from each other, both portions having perforations to register with those in the strips and one portion being bolted to one of the strips, and a pair of tapered pins to it the perforations and chained to the lug.

e. In a device of the character described, two clamps each comprising two pivotally connected perforated strips, and a key to tighten said clamps, said key comprising a lever having a long arm, a fulcrum pin to lit the perforations in the strips extending through the lever and a short curved arm terminating in a transverse member, extending to opposite sides of the lever adapting for use with a strip of either clamp to engage strip of the other clamp placed on either side thereof said transverse member having a pressure face approximately parallel to the fulcrum pin.

ln a device of the character described two clamps each comprising two pivotally connected perforated strips one of the strips of one of said clamps having a bifurcated portion to receive a strip of the other clamp, a key to tighten said clamp comprising a lever having a long arm, a fulcrum pin to the perforations in the strips and extending through the lever a short curved arm terminating in a member extending to opposite sides of the short curved arm to engage both parts of the bifurcated strip of the other clamp.

ANTONIO CURRENTE.

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