US152769A - Improvement in soldering-tools - Google Patents

Description

1 present an extended heating-surface.

UNITED STATES ATEnT rricn.

JOSEPH SEARS, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN 4SCLDERlNCai-TOOLS.

Specification forming pait of Lette's Patent No. 152,169., dated July 7, 1874; applicaion filed Aprn 7, 1874. Y

@Asn A.

To all whom it may concern Be 1t known that I, JOSEPH SEARS, ot' the city of Chicago and county of Cook, in the March, 1873, the same having a hollow tip,

within which a heating-jet is sustained by properly-mingled gas and air conducted into the tip-cavity through Aa tubular handle.

The present invention consists, iirst, in a superior mode of coupling the hollow tip orl copper tothe handle-tube. The metal of whichthis part of the tool or iron is composed expands to such an extent and oxidizes so readily, especially at joints, that the proper attachment of hollow tips has been a matter of considerable practical difficulty. In the improved tool the joint is enveloped,

lwhile hot, by dame or gas, so as not to be exposed to the air, and, consequently, will not oxidize to any considerable extent. The Hamespace is, at the same timeyso formed as to The tightening` of the joint, if it becomes loose, is provided for. The scrap-copper may be sepa-rated with facility when the tip is worn out, and a new tip may be screwed onto the saine couplingtube or plug. The latter is also adapted to bereadily and cheaply made, of small size, from gas-pipe; and the tip is adapted to be formed without the labor and waste of any turning operation. The invention consists, Secondly, in a shield or detlector applied t0 the handle-shank, to turn back the hot products of combustion escaping from the rear end of the tip, so as to cause them to envelop the tip more perfectly, and thus assist the heating` operation andpretard oxidation. The shield or deiector operates also to throw the heat upon the work, so as to facilitate the soldering operation; it also operates to protect the hand while the tool is in use.

Figure l is a side elevation of asolderingiron, illustrating this invention. Fig. 2 is a longitudinalsection of the saine. Figs. 3 and 4 are, respectively, alongitudinal section and an end view of the improved tip shown in Figs. l and 2. Figs. 5 and 6 are similar views of a modified tip. Fig. 7 is a perspective view of a holder or rest adapted to support the iron while it is not in use, and to co-operate with the inclosed jet and the shield or deilector, for heating the copper and protect ing it from oxidation. Fig. S is a vertical longitudinal section of the holder or rest, showing the iron in elevation within the same.

Like letters of reference indicate corresponding parts in all the figures.

rIhis improved soldering-ironie composed of a hollow copper tip, A, a wooden handle, B, an axial tube, C, constituting the shank and core of the handle, a coupling tube or plug, i

D, for uniting the tip and handle-tube, and a shield or deilector, E, supported behind the tip, to throw the products of combustion back over the same, and to protectthe hand of the operator. The tip or copper is made of suitable externall shape for its work, and may be manufactured, for instance, by hain- Inering or casting Va solid blank, and then recessing and iinishing it by dies in a droppress, as more fully described in another specification. rlhe tip-cavity z is tapped with a screw-thread, l; and equidistant longitudinal passages 2 are formed around the same, for distributing the escaping products Ofcombustion, and bringing them in contact with more surface. In the preferred form of tip, these passages 2 are formed by wings of the tip-cavity, as illustrated in Figs. 2 and 4, and the screw-thread l is tapped in inward projeciions, by which the passages are separated; but the passages 2 may be formed in the outer surface of a large `plug or supplementalplug, DZ, to be used in connection with a circular tip-cavity, z2, and a continuous screw-thread, l, therein, as illustrated in Figs. 5 and 6.

rilhe handle B inthe illustration is wholly a wire, y, in a circumferential groove.

The handle-tube C consists of small gas-pipe, and, for the purposes of this invention, may be wholly plain, unthreaded, and unturned. It projects at the end ot' the handle suiiicient to receive the end of a flexible tube, and extends into the tip-cavity as the burner.

OwingV to the construction of the tip as above described, the plug D is adapted to be readily and cheaply madeof gas-pipe, consisting of a short section of this material of the proper diameter. .The plug may be permanently attached either to the handle-tube or to the tip, or separably to both. In the illustration, the plug is permanently attached to the handle-tube by driving it thereon, and its end is threaded, so as to screw into the tip, or into the plug or supplemental plug D2, (shown in Figs. 5 and 6;) or the handle-tube may be screwed directly into the latter.

This supplemental plug D2 is not illustrated as a modication of the plug D, as hereinafter claimed, but as a m odication of the improved tip.

Owing to the relatively small size of the coupling-screw as formed by the plug D, it is not materially affected by the expansion ofthe tip, and the expansion ofthe tip does not otherwise strain or weaken any part. By partially unscrewing the tip, and' compressing it within pointed jaws in a vise, it may readily be tightened up. By heating and thus expanding the worn-out tip, it may readily be screwed ofi', and the scrap-copper thus saved, and with equal facility a new tip may be. applied. The plug may thus be made to answer for several tips.

The shield or deiector E is made oi' cast or malleable iron, and may be attached to the handle-tube behind the plug D by a set-screw, x, or it may be formed on or 'attached to the coupling tube or plug. The shield or deflector is constructed with a concave face to increase its efficiency.

Figs. 7 and 8 illustrate the employment of a holder or rest, H, for supporting this improved iron while it is out of the hand, employed as illustrated, the same consisting of a horizontal tube open at both ends, of suflicient size to inclose the tip and deilector, and supported on the bench by one or more legs. The delector closes the rear end of this holder, and the products of combustion are Ycaused to escape through the other end, which is contracted around the point of the tip. But this holder or rest is the subject-matter, in part, of another invention, `described in a separate speciication of even date herewith.

rIhe following is claimed as new in this invention, namely:

1. The imperforate hollow tip A, having an internal screw-thread, 1, and longitudinal escape-passages 2 extending outward throughv the rear end of the tip, substantially as herein shown and described, for the objects set forth.

2. The combination of the imperforate hol'- low tip A, having an internal screw-thread and longitudinal escape-passages in its rear end, the gas-pipe coupling or plug D, and the small handle-tube C within the latter, sub'- stantially as herein specified.

3. In combination with the hollow tip A, having a flame-cavity and open rear end, the shield or deilector E applied behind the tip to throw back the products of combustion, so as to cause them to envelop the tip, and to heat the work, and to protect the hand, as described.

In testimony of which invention I hereunto set my hand this 27th day of March, 1874.

Witnesses: JOSEPH SEARS.

HENRY MonEHoUsE, H'ALsrED BURNET.

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