US1552356A - Wire-tying device - Google Patents

Description

Sept. 1, 1925."

T. S. SWARTS WIRE TYING DEVICE Filed May 20. 1924 INVEN TOR.

THEBU. s sumgs ATTORNEY Patented Sept. 1, 1925.

UNITED STATES THEODORE s. SWARTS, or SAN rRA vcIsco, CALIFORNIA.

WIRE-TYING DEVICE.

Application filed May 20, 1924. Serial No. 714,735.

To all whom it may concern:

Be it known that I, THEODORE S. SwAR'rs, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented new and useful Improvements in Wire- Tying Devices, of which the following is a specification.

This invention relates to improvements in wire-tying devices for concrete forms and has particular reference to means for tightening and twisting the ends of a wire.

The principal object of this invention is to produce a device of this character which is economical to operate and therefore a time saver.

Another object is to produce a device which is simple in construction and therefore cheap to manufacture.

A still further object is to provide means whereby the gripping action is automatic.

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

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a side elevation of my device,

Figure 2 is a cross section taken on the line 22 of Figure 1,

Figure 3 is a fragmentary top plan view showing the manner in which the wire is gripped,

Figure 4 is a side elevation showing the present method of twisting a wire,

Figure 5 is a fragmentary side elevation showing my method of twisting a wire, and

Figure 6 is a top plan view of Figure 5.

In the accompanying drawings wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 5 designates a bar having a cross handle 6 attached thereto. This bar has secured to its opposite end, as by a bolt 7, a stationary jaw 8 which stationary jaw is bifurcated as shown at 9 and 11.

A movable L-shaped jaw 12 is pivoted in the bifurcation 9 as shown at 13 and has a nose 14 adapted to enter the bifurcation 11. A link 16 ispivoted at 17 to the L-shaped jaw 12 and has its opposite end pivoted at 18 to the end 19 of a key 21 slidable in a keyway 22 formed in thebar 5. This key has an upturned end 23.

At 24 I have shown a sliding collar having an offset fulcrumed lever 26 attached thereto, the purpose of which will be later described. Referring now to Figure 4 I have shown a concrete form consisting of uprights A and B, form boards C and D and vertical re-enforcing bars E, to which are attached horizontal re-enforcing bars F by wires G. The form tying wire is shown at H and it will be noted that the ends of this wire are twisted as at I and that further twists are made at J and K, the twists made at J and K are made by hand by inserting a screw-driver or some similar instrument between the wires and twisting. This operation is slow and it results in the operator tearing his hands upon the wire G, it often taking as long as fifteen minutes to twist this style of wire.

By referring to Figure 5, it will be noted that the tie-wire L is twisted only at the point M. By referring to Figure 6, I have shown the top plan view where it will be noted that the completed operation presents an appearance as shown in full lines in this drawing, that is, if the jaw is open so that the nose 14 may be dropped downwardly therefrom. However, if the jaw is merely released and the nose pulled directly outwardly it will cause the ends of the wire to take the position shown in dotted lines in this figure.

The manner of operating my device is as follows A wire is placed about the form uprights as shown in Figure 4 and the ends crossed as shown in Figure 3. The device is then placed as shown in Figure 1, the collar 24 moved toward the cross handle, which causes the jaws to close, gripping the crossed ends of the wire. By now bearing down upon the device the fulcrum lever 26 will come into contact. with the upright A which will cause the collar 24 to press firmly against the lug 23, of the key 21, which action is transferred through the lug 19, link 16, to the L-shaped jaw 12, thus tightening the gripping action. As long as there is downward movement, this gripping action will be suflicient to pull the wire up tight for twisting. By now giving the device a twisting action through the medium of the cross handle 6 a twist similar to that shown in Figure 6 may be quickly made.

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 in the shape, size and arrangement of parts may be resorted towithout departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described my invention, I claim,:-

1. In a device of the character described, a bar, a keyway formed in said bar, a sliding key positioned in said keywa-y, a collar positioned on said bar, and surrounding said key, lugs formed on said key and contacting the opposite ends of said collar, a fulcrum lever secured to said collar, a pair of jaws mounted on said bar, and means for operatlugs formed on said key, said link being connected to one of said lugs, a collar slidable on said bar and positioned between said lugs on said key, an offsetfulcrum lever connected to said collar, and having its free end spaced substantially parallel to said bar for the purpose specified.

3. In a device of the character described, a bar, an immovable jaw secured to said bar and having a bifurcated end, a movable jaw having a nose adapted toextend into the bifurcated end of said first mentioned jaw, a link secured to said jaw, a sliding key movably held in said bar, a collar surrounding said bar and engaging upturned ends of said key, a fulcrum lever secured to said collar, one end of said fulcrum lever being 49 offset from said bar, the free end of said lever being substantially parallel with said bar, for the purpose specified.

In testimony whereof I afliX my signature.

' THEODORE S. SWARTS.

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