US1794904A - Clamping and tie-gripping tool - Google Patents

Description

March'3, 1931. P. A. JONES 1,794,904

- CLAMPING AND TIE GRIPPING TOOL Filed Sept. 2'7, 1928 2 Sheets-Sheet l l II INVENTOR.

A TTORNE Y.

March 3, 1931.

P. A, JON Es- CLAMPING AND TIE GRIPPING T061,

Filed Sept. 27, 1928 2 Sheets-Sheet 2 INVENTOR.

PMQ QJW A TTORNEY.

Patented Mar. 3, 1931 PATENT OFFICE PAUL A. JONES, OF CINCINNATI, OHIO CLAMPING AND TIE-GRIPPING TOOL Application filed September 27, 1928. Serial No. 308,711.

My invention relates to devices for retaining the forms in which concrete is formed in proper spaced relation and at the same time holding the forms against either coming together or spreading apart during the pouring of the concrete, the deviceserving also to grip and hold together the sections of board or the like from which the concrete forms are built up. i

My invention relates topresent day practice informing concrete structures by pouring the same between pieces of form work. The usual way of making up the form work consists in making up sections of boards or other material held about the margins by two by four lumber or the like, and nailing the sections together orclamping them together to form walls withinwhich the slab is poured. In orderto keep the sectional walls properly spaced, blocks of wood as spacers are inserted between the walls, which blocks are, supposed to be removed during the progress of pouring'the slab. In order to keep-the sectional walls from spreading apart wires are inserted across between the walls and secured to the outside of the walls, as by nails or looped back and forth between sections. These wires are clipped when the g form work is removed.

My invention provides instead of the wooden .blocks, which arevery often left in place by the, workmen, for. spacer blocks of metal such: as fiat wire bentinto desired shape, andthe ties consists in extensions forming part of the spaces. The section walls are held together by clamps which my invention also provides, said clamps serving also to draw tight and grip the ties, thus serving all of the purposes of the former construction.

. I accomplish my objects by that certain construction and arrangement of parts to be hereinafter more specificially pointed out and claimed.

In the drawings: Figure 1 is a detail section taken through a portion of a sectional wall. of a concrete form work, showing my invention.

F igureQ is a plan view of the parts shown in Figure 1.

F'gure 3 is a. side elevation of a concrete form with concrete poured therein illustrating the mode of use of my invention.

I Figure 4 is a perspective of my clamping tool closed. I

Figure 5 is a like view of the same when opened, prior to use.

Figure 6 is a section through the clamping arms of the tool showing the tie receiving slot.

Figure 7 is a section of the tie spreader portion.

Referring first to the form work,I have indicated sections of wooden siding 1 nailed to two by four pieces 2 also of wood. In making up the wall of a'form, the two by four frames are turned outwardly, and the sections are lined up and secured together to form a pair of continuous walls between which the slab 3 is to be poured.

The tie and spacer devices used by me are 79 formed of annealed flat wire or narrow strip, which is cut so as to be wider along a central line, and narrower at each side of the central line. At the central line the strips are formed with bases 4: and two diverging wings 5, 5. The bases of two pieces are set together and spot welded, or riveted so that a four winged median structure is formed. The remainder of each'strip or piece is no wider than the base at the winged portion, 88 and these ends of the two strips exten'din from the median structure of the assemble members form'the ties for the form work, while the winged median portion forms the spacer. The ends of the strips or tie portions 55 may or may not be secured together and are indicated at 5a.

The clamping tools provided for use with the-tie and spacer elements, are formed of a main body portion having a central hollow 90 tubular portion 6, with a clamp jaw or foot 7 extending therefrom and two rearwardly extending walls or ears 8, 8, said walls being joined together by a horizontal web 9.

The upper jaw of the clamp, as indicated at 10, is part of an L-shaped piece with the top serving as the clamp jaw, and the remainder 11 sliding in the hollow body of the clamp body.

An operating handle 12 is provided which is pivoted on a pin 13 extending across between the walls '8 of the clamp body. Preferably the walls are formed with arcuate slots 14 therein. The pin 13 may thus be adjustably mounted in a notch 15 at one end of the slots or in a notch 15a at the other end, thereby adjusting the position of the handle with relation to the upper jaw of the clamp, so that a greater or less tension may be placed on the clamp.

A pin 16 in the handle-serves to pivotally engage two straps 17 which straps are pivoted to the inner end of the upper jaw by means of another pin 18. I find it preferable, in order to secure'a nicety of adjustment, to mount the pin 18 in a slot 18a in which a set screw 18?) can be used to adjust the pin 18 at a desired position in the slot. 7

As so constructed, when the handle is pulled down, the upper jaw is moved toward the lower one, with the portion llslidi'ng in the clamp body. This position is shown in Figure 4c.

The innerface of the hollow body portion of the clamp is provided with a slot'19 of.

a size to receive the tie portions 5 of the spacer pieces. These tie portions are to be thrust through the slot, and out through the back of the clamp body between the pivot pin for the handle, and the cross Web between the handle supporting walls. When the handle is lowered and the portion 11 slides down in th e clamp body, if a tie has been located therein, it will draw the tie down into a loop, as shown in Figure 1,thus pulling'on the'tie, and orimpingit against withdrawal, solong I as the clamp handle is down.

In setting up the sectional plates of two by fours'with boards secured thereto, the spacer elements are set into place between walls,

7 around the edges of each section, as the walls of the form are constructed, with the spacers definmg the distance between walls, and the tie ends extending out between the two by four framing. A clamp is provided for each tie, 1. e., two clamps for each spacer element 7 andset in place withthe frames of two ad'- joining wall sections between the jaws, and

the tie end of the spacer piece extending through the clamp body as described, The

clamp handle is then pulled down, with the result of gripping the two by fours of the section frames together, tightening the engagement of the sections over thespacers, and

gripping the tie ends tightly against with drawal.

.To prevent the spacer portions from digging'into the wood forms, I'prefer to turn back the ends of the wingsof at -least two wings at each end of each spacer portion.

' These turned back tabs on the ends of the wings'are best shown in Figure 7.

It will be-evident that form walls can be progressively built up in sections, by using wallswill be gripped tightly together and held against spreading or contracting during the concrete pouring and setting operations.

IVhen the concrete slab has set, the clamps are released, the wall sections removed for lG-llSG, and the ends of the ties which proj ect from the slab are trimmed away with a suitable cutter.

It will be apparent that I have not attempted'to describe more than one embodiment of myinvention, and I have done so in detail in order to give one complete example of the invention and without intent to limit the resort to equivalent structure for accomplishing my objects.

The construction of the clamps and of the spacer-tie devices is subject to considerable variation without departing from the spirit of my invention. ,7 v

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

1. A clamping and wire tie gripping tool for concrete form work which comprises, an operating handle, means operatedthereby to grip the form work frames, and means also operated thereby to deform and grip a tie.

2. A clamping and tie gripping tool having a housing, a member movable through the housing, said housing having means thereon to receive a tie transversely o'f'the path of said member, whereby movement of the member will deform the tie, and a form work gripping jaw on'said member and means on the housing to cooperate with said jaw, and anoperating handle for said member. 3', A clamping and wire tie gripping-tool for concrete form work which comprises an operating handle,- jaws actuated said handle for gripping frames of said form work, said :jaws having supporting members slidingly engaged together, and means in connectionwith said slidingly engaged members for deforming said tie during actuation ber cooperating with said first jaw, means on said housing to receive a tie and hold said tie in the path of said member whereby said tiev may be gripped upon actuation of said clamp, and'an operating handle, means connecting said operating handle and said memberfor actuating said'second aw, said handle being pivotable on said housing at a plurality of points. 7 PAUL A;

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