US1719921A - Clamp - Google Patents

Description

July 9, 1929.

CLAMP Filed Oct. 22, 1927 Patented July 9, 1929.

UNITED STATES enonen LB. 130800, or CHICAGO, ILLINOIS.

CLAMP.

Application filed October 22, 1927. Serial No. 228,092.

The main objects 031. this invention. are to provide an improved 'lorm 0T clamp adapted for use in connection with a flexible tie element; to provide a clamp having an improved iorm oit collar for receiving a portion of. the tie element; to provide improved means tor detachably securing the tie element to the collar; to provide an improved form of tool for adjusting the tie element relative to the collar; and to provide a device of this kind which is particularly adapted for use as a term clamp.

An. illustrative embodiment of this inven tion shown in the accompanying drawing,

wherein Figure l is a transverse section 01* a girder mold, to which an improved clamp applied.

Fig. 2 is a plan of the improved collar.

Fig. 3 is a side elevation 01 the collar h aving the ends 01? a tie element seated therein, the latter being shown in section.

Fig. 1 is a longitudinal section taken on the line 4l.t of Fig. 2, and showing also a wedge in section and a portion of the tie element in elevation.

Fig. 5 is a transverse section, taken on the line 5 5 01? Fig. 2, and showing also the tie element in section and a portion ot the wedge in elevation.

Fig. 6 is a perspective of the improved collar.

In the specific form herein shown, the invention is applied to a form clamp comprising a tie element and a holding member in the form of a collar secured to the tie element tor adjustment longitudinally thereof. Adjustment oi? the holding member on the tie element is accomplished by means of a separate tool adapted to grip the tie element at a point beyond the collar for pulling the former relative to the latter. Improved means are also provided for detachably securing the tie element and collar together.

In the specific emhodin'ient herein illustrated, the improved clamp is applied to a girder mold suitable for use in concrete construction work and comprising the usual sections 1, battens 2 and spacer blocks 3 sus-.

pended from an I-beam 1; by the tie band.

I In the form shown, the improved term of clamp comprises a tie element 5, a collar 6 and a tool 7 which is detachable so that one or two of such tools may serve a large number of clamps.

The tie element 5 is preferably in the form 01' a flexible metal band, the size of which is dependent upon the character of the mold to which the clamp is applied.

In the embodiment shown, the collar (5 co1nprises a block having a substantially i'lat hearing surface 8 on one side thereof. which is adapted to bear against the I-heam 4. Formed on the opposite side of the block, is a seat 9, which is adapted to receive the tie element 5. The seat 9 has an unobstructed mouth 10, so as to permit any portion of the tie band to be placed on the seat, without the neijcessity of pulling the ends of the band tl'irough the collar as has been done heretofore. In the term shown, the seat 9 is sut- Iiciently wide to support two tie bands arranged side by side or two portions of a single band similarly arrangechas shown in Figs. 3 and 5.

Located. on respectively opposite sides oi? the seat 9, is a pair of upstanding lugs 11 and 12, which are slotted to provide keyways 13 and 1 1 respectively. Formed in the seat 9, is a transverse recess 15, into which the tie band is Cl'ilTlPOtl by the action of a wedge 16, which is adapted to be driven into the keyways 12-3 and 14;.

In the .lorm shown, the tool 7 comprises a shank 17 providing a handle having a jaw 18 provided with a pivot pin 19 on which is mounted a movable jaw 20. The jaw 20 (-onipr es a pair of spaced fingers 21. connected together by a pin 22 which is adapted to coact with the jaw 18 for gripping the tie band. The lingers 21 are recessed adjacent their tree ends to provide bearing parts 23, which are adapted to be tulcrumed on the I-beam 1 as shown in Fig. 1. The bearing parts 23 project beyond the pin 22 so as to deline a threat adapted to receive a portion. 01. the tie band.

In operation, the tie band. 5 is passed through apertures in the section 1 and batten 2 and is then, looped around the I-beam 4;. One oil? the innn'oved collars 6 is then placed on top oi the Lbeam andv the on d portions of the tie hand are inserted in the seat 9 in the manner shown in Figs. 1 and 3. tools 7 are then applied. to the ends 01 the tie band and the handles 17 are rocked out\ 'ardly away from each. other to pull the ends of the band outwardly away from the collar. While the tie band is held taut by means 01? the two tools 7, the wedge 16 is driven into the keyways and 141. for locking the tie band and collar together. The tools 7 may then be removed for use on other parts 01. the mold.

Two 01. the

Wardly from the opposite face of said plate and arranged to form a seat for a tie element, the space between said ridges formin g a key- Way for a Wedge, and a pair of spaced lugs located'on respectively opposite ends of said ridges and having openings arranged in prolongation of said lieyway.

Signed at Chicago this 20th day 01 October 1927.

GEORGE B. BOSCO'.

Images