US1561224A - Electrical soldering device - Google Patents

Description

ilcv. 1925. 1,561,224

R. FFJTSC HE ELECTRICAL SOLDERING DEVICE Filed Oct. 8, 1924 immlll Patented Nov. 10, 1925.

- UNITED STATES RICHARD FRITSCHE, OF LIPPSTADT, GERMANY.

ELECTRICAL SOLDEBING DEVICE.

Application filed October 8, 1924. Serial No. 742,311.

To all whom it may concern:

Be it known that I, RICHARD Fm'rsoHn, a citizen of the German Empire, andresidmg at Lippstadt, Germany, have invented certain new and useful Improvements in Electrical Soldering Devices, of which the following'is a specification,

The invention relates to a device adapted for soldering electrically wires, saw-blades and the like, and in particular for soldering the wires of wire cables. Up to the present time the wires in hoisting and other wire cables were soldered'by means of a gas flame, which proved tiresome and unreliable. Thls drawback is overcome by the new electrical soldering device. In order to be able to quickly regulate the intensity of current according to requirements, accordmg to the present invention the heating of the wire, saw blade or the like to be soldered is effected by means of an alternating current transformer, whose primary coil is subdivided in at least two coils, which can be connected by means of push-buttons in such a way that either only one coil will act solely, or that both or a plurality of primary coils are con nected in series or parallelly.

A mode of execution of the device of the kind referred to is represented on the drawing in which 7 Figure 1 is an elevation,

Figure 2 a side elevation of the clamp, serving for holding the wire,

gigure 3 a top view of the push-button an Figure 4 a diagram showing the connection of the primary coils.

The secondary coil to of the transformer a is connected with the supports 12 which are insulated from one another and from the casing. Upon these supports two clamping devices a and (l are mounted and adapted to be adjusted in respect of the wire to be soldered. The clamp d is resting immediately on the support I) and can be adjusted by means of a thumb-nut while the clamp 0 slides upon a base 6 provided with a stop, and it can be fixed by means of a thumb-nut g to said support. Two springs engaging the clamp c laterally. tend to pull the clamps against the stop of the base e projecting in an upward direction. Each clamp is pro vided with a clamping arm h which is pressed against the stationary clamping jaw by means of a winged nut 1; against the action of a spring is which latter tends to lift nected differently by means of the push-buttons l, 2, 3. The push-buttons 1 and 2 are mounted on a lever l consisting of insulating material, and on both sides-of its axis of rotation n. This lever carries upon its disengaged end besides the push button 1 a contact knife 8 adapted to engage a contact 8 of the primary coil.- On the opposite end of the lever Z both the contact knives p and g are arranged, adapted to engage the contacts p and g of the primary coil. Generally the lever Z is held in its inoperative position by means of a spring t, in which position none of the contact knives will be in engagement with the pertinent contact.

The push-button 2 is mounted on a onearmed lever m carrying on its disengaged end a contact knife 7' which will engage the contact 7' after pressing down the said pushbutton.

As soon asthe push-button 1 is pressed down the contact 8 s will be closed. The current supplied from the lead 0a (Figure 4) will then flow through the first primary coil u, from thence through the lead a to v the closed contact sys further through the leads a and z to the second coil 'v and through the lead 3 to the other pole. Thus both the coils u and 'v are connected in series.

If the push-button 2 is pressed down, the current will flow from-the lead a: through a and e to the contact r r from thencethrough .2 to the coil v and from there to the lead y. 'Thus only the coil o is cut in.

On pressing down the push-button 3 the current will flow from'the lead on through the coil to and from thence through'z e to contact 9 g and from there through 2 to the lead y. Another portion of the current will flow from the lead a: through 2, 2 to the contact 11 p, from here through a z to the coil 'v and from the latter to the lead 3 Thus both the coils u and c are connected parallelly.

The ends of the wires'to be soldered together are made oblique and then fixed in the clamps c and d in such a manner that the oblique ends will fit together. In this instance the clamp 0 must abut with its rear end against the stop of the base e. Then a piece of thin brass wire is wound round the portion to be soldered in order to serve soldering material, and then according to the diameter of the wire to be soldered one of the push-buttons 1, 2 or 3 is pressed down for the purpose either to cut in only one coil or to connect both coils in series or parallelly. As soon as the wire is sufficiently heated, in any case both coils will be connected in series with the object in view to allow the solder to flow properly and to fill in neatly the space between both ends of wire. Copper wires too, can be soldered with silver solder in the same manner,

The wire will expand under the action of the heat thus causing the oblique ends of wire to be pressed firmly together, since the clamps 0 and (Z cannot recede. After the solder has reached its liquid state, the pushbutton is released, so that the supply of current is interrupted and the wire allowed to cool down. When it is shrinking again in consequence of the cooling the movable clamp can yield against the action of the springs 7 thus preventing any tugging at the soldered point still Warm, through which the uniformity and solidity of the solder would be affected.

ll claim:

1. An electric soldering device for wires, saw blades, steel bands and the like, comprising a transformer having a multiple part primary coil and a secondary coil, a com trally pivoted lever, contacts, and electrical connections, whereby when the said lever is moved in one direction it bears against predetermined contacts to close a circuit through the primary coil with the parts thereof in series, and when the said pivoted lever is moved in the opposite direction it bears against contacts to close a circuit through the primary coil with the parts thereof in parallel.

2, An electric soldering device for wires,

saw blades, steel bands and the like, com

prising a transformer having a two part primary coil and a secondary coil, a cen-,

the primary coil with the parts thereof in parallel.

3. An electric soldering device for wires, saw blades, steel bands and the like, comprising a transformer having a two part primary coil and a secondary coil, a centrally pivoted lever, contacts, and electrical connections, whereby when the said lever is moved in one direction it bears against predetermined contacts to closea circuit through the primary coil with the parts thereof in series, and when the said pivoted lever is moved in the opposite direction it bears against'contacts to close a circuit through the primary coil with the parts thereof in parallel, and a second lever pivoted adjacent one end thereof and adapted to bear against contacts to close an electric circuit through one part only of the said primary coil.

lln testimony whereof I aflix my signature to this specification.

RICHARD FRITSCHE,

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