US1970895A

US1970895A - Wire twisting apparatus

Info

Publication number: US1970895A
Application number: US690919A
Authority: US
Inventors: Winfield S Mcdaniel
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-09-25
Filing date: 1933-09-25
Publication date: 1934-08-21
Anticipated expiration: 1951-08-21

Description

3 w. s. MODANIEL ,9

WIRE TWISTING APPARATUS Filed Sept. 25, 1933 FIECL-ls ELIE-E, 9 FIE-t5. a

EIEuE' INVENTOR 'SAZ'. .M'= HIELL.

A ORNEYfv.

Eurasian Patented Aug. 21, 1934 UNITED STATES i -Artur other.

2 Claims.

This invention relates to improvements in wire twisting apparatus, and has particular reference to a device for twisting and tensioning wire commonly employed in holding together form boards for concrete.

The principal object of the invention is to produce a device of this character which is of sturdy construction and therefore one which will stand 7 the hard usage to which such an implement is used.

A further object is to produce a device which is economical to manufacture, simple to use and one which will permit ready manipulation, even i, in tight places.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawing forming a part of this specification and in which like numerals are employed to designate like parts throughout showing a portion thereof broken away,

Fig. 3 is a. view similar to Fig. 1, with the handles moved in opposite directions so that they may be used for rotating the tool,

Fig. 4 is a cross sectional view on the line 4-4 pf Fig. 2,

Fig. 5 is a bottom plan view of the twister head,

Fig. 6 is a side elevation of the twister drum, and

Fig. 7 is a fragmentary side elevation of Fig. 3

and taken on the line I'I of that figure.

In building construction where concrete moulds are employed it is common to use wire which is placed through the boards and the ends twisted together so as to hold the forms in proper place.

In order to tighten these wires, the two parallel '-=-strands are usually twisted together inside the forms, which results in uneven strain and consequently broken wires in many instances. Applicant has, therefore, devised a means for tightening the wires from a. point outside the form hoards and in such an even manner that there is little danger of breaking the wires.

In the accompanying drawing wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 5 desighates a twisting head having a slot 6 and an opening 7 therethrough. This head is provided with ears 8 and 9 which serve to rotatably position a drum 11, the drum having hexagon shaped ends 12, adapted to slidably receive the ends 13 of handles 14.. The drum 11 has an opening 16 therethrough, the purpose of which will be later seen. The handles are slidably retained upon the hexagon ends of the drum through the medium of bolts 17 and washers 18.

Referring to Fig. 7, it will be noted that the hexagon end 12 is here shown as positioned in a circular opening 19 formed in the handle and is in a position to be slid into the hexagon shaped communicating opening 21. This permits the handle to be rotated upon the hexagon portion of the drum or to be locked thereto at will.

The operation of my device is as follows:--

First the wires, to hold the form, are placed through the form shown at A in Fig. 4 and the two ends given a preliminary twist. These ends are then passed through the opening 7 in the twister head and through the openings 16 in the drum 11. The ends are now bent, as shown at B and C in Figs. 1 and l, after which the handles are worked alternately so as to first rotate the drum, that is with one handle, then by releasing the other handle, and rotating it so as to take a new grip upon the drum, the holding handle may be released and a further turn taken upon the drum, which will result in the wire being pulled to the dotted line position of Fig. 2. Assuming now that the tension is substantially sufficient, then With the handles in the position of Fig. 3 rotation of the head in contact with the form boards as shown in Fig. 4, will result in a twist being given to the wire at a point adjacent the form boards. The construction of the tool is such that the base being rounded adjacent the opening 7 will force the wire to lie fiat upon the form boards and thus take up all slack and make a complete and efficient lock between the wires. To remove the device, after the wires have been tightened, simply pull the handles straight back or laterally and axially of the drum so that the circular portion 19 in the handles will allow the drum to turn, which will free the wire.

It will thus be seen that my device will accomplish all the objects above set forth.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same and that various changes relative to the material. size, shape and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described my invention, I claim:-

groove, a drum rotatably mounted in said head and having an opening therethrough capable of being moved into axial alignment with the opening in said head, handles rotatably secured to the opposite ends of said drum, and means for intermittently positively connecting said handles to said drum, whereby said drum may be rotated.

WINFIELD s. MCDANIEL.