US2579650A - Tie wire clamp - Google Patents

Description

Dec. 25, 1951 P. J. CORCZORAN k 2,579,650

TIE WIRE CLAMP Filed April 5, 1950 \q m N Envenlor WWW W Gttornegs Patented Dec. 25, 1951 UNITED STATES PATENT OFFICE TIE WIRE CLAMP Patrick Joseph Corcoran, Memphis, Tenn. Application April 5, 1950, Serial No. 154,078

4 Claims. I This invention relates to certain new and useful improvements in clamping means for concrete forms, and particularly relates to new and useful improvements in clamping means for tie wires used in conjunction with such forms.

In concrete work it is customary to employ molds or forms for retaining the concrete as it is poured in order that it may set properly, and tire wires, extending through the form and the concrete contained therein, have been employed on the line I--I of Fig. 3 showing the tie wire to retain the walls of the forms, particularly where footings of substantial depth are to be formed.

Much diiliculty has heretofore been encountered in securely and properly anchoring the tie wires and in retaining them with proper tension 1 so as to prevent bulging or sagging of the forms and effect retention in desired position.

The principal object of this invention is to provide a simple, efficient and economical device i for accurately and positively clamping form tie wires and for adjusting and maintaining tension on such wires.

A further object of the invention is to provide a tie wire clamp which may be removably mounted exterior the concrete form and may be employed in one location and when the concrete at such location has set up may be removed and applied to a different or new location.

A further object of the invention is to provide an adjustable tie Wire clamp which is adaptable for use with wires of varying diameters.

A further object of the invention is to provide a new and novel arrangement for positively engaging concrete form tie wires and for readily disengaging the clamp from such wires when it is desired to remove the clamping device.

A further object of the invention is to provide a tie wire clamp which includes a casing having a roller journalled therein, a traction member journalled and interposed over the roller, a clamping follower engaging the traction member outwardly from its traction surfaces and means for clamping the traction member against the roller member.

And a further object of the invention is to generally improve the design, construction and utility of tie wire clamp means.

The means by which the foregoing and other objects of the present invention are accomplished and the manner of their accomplishment will readily be understood from the following specification upon reference to the accompanying drawings, in which:

Fig. 1 is a sectional elevational view taken clamp of the present invention mounted upon a form and engaging a form tie wire.

Fig. 2 is a side elevational view of the tie wire clamp of this invention; and

Fig. 3 is a sectional view taken as on the line III-III of Fig. 2.

Referring now to the drawings in which the various parts are indicated by numerals, the tie wire clamping means of the present invention are adapted for use in connection with a mold or form it of the type generally employed in concrete work for retaining the wet concrete for setting, which form H, as is well known, includes side walls made up in conventional manner from a plurality of boards.

The form I! is provided with a, plurality of tie wires I3, one of which is shown in the drawings, the tie wires being spaced at intervals throughout the form. It also is customary to provide spacers l 5 to limit movement of the form walls toward each other. Preferably tie wires l3 are anchored to the outer sideof one of the form walls, as at ll, and project inwardly through the wall and across the space between the walls, thence through the opposite wall and project outwardly therebeyond.

The clamping device of this invention is adapted to be mounted on the form adjacent the free end of the tie wire l3, and the clamping means consist of a casing or housing It of generally rectangular cross section, the front and rear walls of the housing being apertured as at 2| to receive the free end of the tie wire 13.

The side walls of housing 59 are provided with elongated slots 23, 24, in the lower ends of which slots opposite reduced end portions of a roller member 25 are rotatably and slidably mounted. Superposed over roller member 25, and also rotatable and slidable in slots 23, 24, is a traction member 27 having a central corrugated zone or band 29, the width of the corrugated band being preferably slightly in excess of the diameter of apertures 2|. Traction member 21 adjacent the opposite ends of corrugated band 29 is provided with roller sections 3i which are free of corrugations for the purposes hereinafter mentioned. The roller sections 3| lie adjacent the side walls of housing I9.

Traction member 21 outwardly of housing 19 is provided with an angularly formed head 33, preferably of hexagonal shape as illustrated and adapted to be engaged by a conventional. wrench or other tool for the purpose of rotating the traction member.

Resting upon the roller sections 3i are the depending legs 35 of a preferably channel shaped follower 5-31.. Thefollower Si is freely movable within housing is and the web of the follower provides a seat against which the lower end of an adjustable thrust member, illustrated as a screw 39, bears, the screw 39 being threadedly engaged with a suitable aperture formed through the top ofhousing it for adjustment and extension into housing i9. Preferably the housing 19 is provided with an aperture diagonally crossing an upper corner adapted to receive a suitable removable hanging means, such as nail -H, by which the housing may be removably suspended from the side of form H.

;In the use of the device the free end of tie wire I3 is inserted through one of the housing apertures 2i and projected between the corruigated band 29 of traction member 2'! and lower roller 25. The'housing and enclosed instrumentalities are moved closely adjacent to form 1.! and the housing is removably suspended from the side of the form through the use as of hanging nail 4|. With the device thus positioned screw 39 is-tightened upon: follower 3'! bringing the legs 35 into close engagement with roller sections 3! and clamping wire l3 between-corrugated band 29- and roller 25. Tensionmay then be applied to wire it by rotation of traction member 21 through the application of a wrench or other suitable tool. to traction member head 33 and through the use of such tooleffecting rotation of the traction member As the smooth roller sections 3! underlie the legs 35 of follower 3'! rotation of the traction member-is not prevented, the corrugated band 29 being segregated from engagement with the leg ends. As traction member 21 is rotated the corrugated band, which is clamped against wire I3 by the action of screw 39 and follower 3-1, frictionally engages the wire and draws it between the corrugated band and roller 25, satisfactorily applyingtension to the wire. When the desired tension has been applied the tool employed may be removed. from the traction member head 33 and the engagement of follower legs 35 with the traction member in many instances will be adequate to prevent reverse rotation of the traction member. and roller member and will retain the wire in tensed condition.

If desired, as in cases of extra tension, additional tightening of screw 39 may be accomplished effecting a tighter engagement of follower 31 with the traction member and braking return or reverse rotation of the traction member.

Preferably the device is provided on the side face adjacent the traction member head 33 with an abutment member 43 spaced from the head 33 so as to not impede the desired rotation of the head, but adapted to receive a supplemental removable abutment member, such as nail 45, which will fit within the space between the head 33 and abutment 43' and by engaging the head 33 pre vents'undesired rotation. When the concrete in the form has satisfactorily set up screw 39 may be loosened, unclamping the wire it, hanging slidable and rotatably supported by the sides of said housing, said traction member being provided with a central corrugated traction zone and opposite uncorrugated end portions adjacent said sides, a follower within said housing overlying said traction member and slidable in said housing, said follower having an upper seatand a pair of spaced depending legs, said legs being respectively seateds on said traction: member end portions outwardly from said central zone, screw means threadedly engaging the top of said housing and extending through said top for abutment with said follower seat to force said follower into engagement with said traction member, said tractionmemb'erhaving a head extending beyond said housing, means removably mounted exterior said housing engaging said head to limit rotation of said. traction member, and access apertures formed in the front and rear of said housing, the diameter of. said. apertures being, less than. the width of saidtraction zone, said apertures being alinedwiththeilowerl portion of said zone-and. the upper portion of said-rollermember for guiding a tie wire into said housingbetwen said zone and said roller member:

2'. Clamping means adapted foruse with a form tie wire comprising a hollow housing, a roller member, atraction member,. said members being positioned within: said housing in super posed parallel relation: with said traction. me ber overlying: said roller member and being vertically slidable and rotatably supported by the sides of said housing; said traction member: being provided with a central corrugated traction zone and oppositeuncorrugated end portions adjacent said sides, a follower within said housing overlying said traction member and slidable in said housing; said follower'ha'vingan upper hori Zontal seat'and a pair of spaced depending. legs, said" legs being respectively seated on said traction member end portions outwardly from said central zone, thrust means adjustably' engaging the top of said housing and extending through said top for abutmentwith said follower seat to force said follower into engagement with said traction member, said tractionmember having a head extending'beyond said housing, and access apertures formed in the front and rear of said housing, the diameter of said apertures being less than the width of said traction zone and alin'ed with the lower portion of said zone and the upper portion of said roller member for guiding a tie wire into said housing. between said zone and'said roller member.

3. Clamping means adapted for use with a form tie wire comprising. a hollow housing; a roller member, atract-ion member, said members being positioned within said housing in superposed'parallel relation with. said traction member overlying said. roller member andbeiiug vertically slidable and rotatably supported by the sides of said housing, said traction. member being provided with a central corrugated traction zone and opposite uncorrugated endportions adjacent said sides, afollower within said housing over lying said traction member and slidable in said housing, said follower havingan upper horizontal seat and a pair of spaced depending legs, said legs being respectively seated on said traction member end portions outwardly from said central zcne thrust meansi adjustably enga the top of said housing andextending through said top abutment with said follower seat to force said follower into engagement with said traction member, said traction member having a head extending beyond said housing.

4. Clamping means adapted for use with a form tie wire comprising a hollow housing having opposite slots in its sides, a cylindrical roller member, a cylindrical traction member, said members being positioned within said housing and having end portions of reduced size slidably and rotatably supported by the slots in the sides of said housing, said traction member being provided with a corrugated traction zone, a follower within said housing perpendicular to one of said rotatable members and slidable in said housing, said follower having a seat and spaced legs extending from said seat, said legs being respectively seated on said one rotatable member, thrust means adjustably engaging said housing 6 and extending into abutment with said follower seat to force said follower into engagement with said one rotatable member.

PATRICK JOSEPH CORCORAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 598,527 Michael Feb. 8, 1898 2,433,477 OQuinn et al. Dec. 30, 1947 FOREIGN PATENTS Number Country Date 365,150 Germany Dec. 9, 1922

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