US1475371A - Stripping bar - Google Patents

Description

Nov. 27 1923' w, DAVIS.

. STRIPP-ING BA Filed Nov. 15 1921 l-ll.

Patented Nov. 27, 1923.

I warn EDWARD WRIGHT DAVIS, OF ATA$GADERO, CALIFORNIA.

srR-IrrrNG BAR.

Application filed November 15, 1921. Serial No. 515,282.

T 0 all whom it may concern:

Be it known that I, Eowano lVnrcrrr DAVIS, a citizen of the United States, resid ing at rrtascadero, in the county of San Luis Obispo, State of California, have invented a new and useful Stripping Bar, of which the following is a specification.

This invention relates to a stripping bar and is particularly directed to a tool adapted for use in stripping concrete molds from the set concrete.

An object of the invention is to provide a tool having a cutting edge for cutting tie wires of concrete molds, and a jaw for en gaging certain of the timbers of the mold when the tool is utilized in taking the mold apart.

Various other objects and advantages will be more fully apparent from the following description of the accompanying drawings which form a part of this disclosure and which illustrate a preferred form of embodi ment of the invention.

Of the drawings:

Fig. 1 is a plan. view of a concrete mold showing the tool engaging a member of the mold.

Fig. 2 is a perspective view showing the tool in position for cutting one of the tie wires.

The stripping bar of the present invention is utilized for cutting the tie wires of a concrete mold and for taking apart the timbers of which the mold is constructed.

In the drawings an ordinary form of mold is illustrated and comprises a plurality of vertical timbers 1 to which the boards 2 forming the side walls of the mold are nailed, the opposed side walls being held against spreading apart by transverse tie wires 3 having loops which extend around the timbers 1 with the middle portions of the wires twisted together as shown.

After the concrete has been poured and allowed to set. it is then necessary to remove the mold and for this purpose the stripping bar shown is utilized to break or cut the tie wires and to loosen and pry oft the timbers 1 from the boards 2 so that said boards may be removed without breaking. The stripping bar, in its preferred form, comprises a handle 4: which may have an angled or inclined chisel end 5 for use as a pry, and a flattened head 6 at its other end having a longitudinal socket or notch 7 providing opposed jaw members '8, with the upper end of one jaw member formed to provide a hook 9; the upper edge of the hook is preferably brought to a concave knife edge 10 to form a cutting member.

The bar or handle 4: lies in substantially the same plane with the jaws, and the hook projects away from the socket and is located so that in use the hook 9 may be inserted beneath a tie wire 3 when the edge of the jaw is applied to the edge of the timber as shown in Fig. 2; the handle 4 should then be pulled outwardly, using the jaw carrying the hook as a fulcrum and causing the hook to break the wire or the knife edge 10 to sever the wire. After breaking or cutting the several tie wires each of the timbers 1 may be loosened and detached by engag ing or fitting the notch 7 over the edge of said timber, as shown in Fig. 1. The width of the socket should enable it to fit closely to the timber, as this prevents the jaws from injuring the wood and enables the timbers to be used again and again without injury. In loosening said timber the bar is used as a lever, that is, it is swung sidewise and in most instances by such sidewise swinging of the tool, the timber will be rocked so as to become detached; but if not, then the chisel end 5 of the tool may be employed to pry the timber 1 from the boards 2.

This structure provides a cheap durable tool by the use of which the operation of taking the concrete mold apart is greatly facilitated.

It is to be understood that the present invention includes such changes and modifications as come within the scope of the following claim.

I claim:

A stripping bar for taking down wired concrete forms embodying vertical timbers with wire loops passing around them for holding the side boards in place, consisting of a bar with a head having a socket with a jaw on each side, the rear portion of one of said aws having a hook projecting away from the socket and with its point substantially in line with the outer edge of said jaw so as to enable the same to pass between the loop of wire and the edge of the vertical timber when the outer edge of the adjacent.

is applied to the edge of the timber,

said bar lying in substantially the same Signed at Santa Maria, California this plane as said jaw, so that the said jaw may 8th day of November 1921. operate as a fulcrum for the bar to exert a force at the hook to break the loop, said EDWARD WRIGHT DAVIS jaws operating to fit over the timber to per- Witnesses: unit the same to be displaced from the side L. J. TOWSLEY,

of the form by means of the bar. FRED J. N BLE.

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