US496775A - Electric forge - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

.G. n. BURTON & E. E. ANGELL. ELECTRIC FORGE.

No. 496,775. Patented May 2, 1893.

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2 Sheets-Sheet 2. G. D. BURTON 8:;E. E. ANGELL. ELBGTRIG FORGE.

No. 496,775. Patented May 2, 1893.

* NrTnD STATES PATENT Orrrcs.

GEORGE D. BURTON, OF BOSTON, AND EDWIN E. ANGELL, OF SOMERVILLE, MASSACHUSETTS, ASSIGNORS TO THE ELECTRICAL FORGING COMPANY,

OF MAINE.

ELECTRIC FORGE.

SPECIFICATION forming part of Letters Patent No. 496,775, dated May 2, 1893.

Original application filed October 6, 1891, Serial 110.407.900- Divided and this application filed November 18, 1892. Serial No. 452M134 (No model.)

To aZZ whom it may concern.-

Be it known that we, GEORGE D. BURTON, residing at Boston, in the county of Suffolk, and EDWIN E. ANGELL, residing at Somerville,

in the county of Middlesex, State of Massachusetts, citizens of the United States of America, have invented certain new and useful Improvements in Electric Forges, of which the following is a specification.

This invention relates to an electric forge for heating to a forging temperature bars or blanks of metal from which articles are to be formed.

The object of the invention is to provide an electric forge for the convenient and economical heating of bars or blanks from end to end thereof, and for heating bars having beveled or tapered ends.

Figure 1 representsa front elevation of this :0 improved electric forge adapted for bars having beveled or tapered ends. Fig. 2 represents a plan thereof. Fig. 3 represents aside elevation thereof. Fig. 4 represents this improved forge having two sliding clamps.

Similar numerals of reference indicate corresponding parts in the different figures.

The rings 10 and 11, whereof segments only are represented in the drawings, constitute the positive and negative elements of an elec- 0 trio current converter for transforming a current of small volume and high voltage into a current of low voltage and large volume.

The construction of this converter does not constitute a part of this invention, and therefore need not be herein shown or described.

Any suitable current converter or source of electric heating currents may be used in connection with this improved forge. A short bracket 12, providedwith a clamp 11 projects downward and outward from the ring 10, and a short bracket 13, provided with a clamp 15 is attached to the ring 11 and projects upward and outward therefrom, terminating in the same horizontal plane as the bracket 12.

5 These brackets are composed of copper or other suitable conductive material or composition. A vertical rod 20 is supported at its upper end in the clamp 14 of the bracket 12, being vertically adjustable therein, and a vertical rod 21 is supported in the clamp 15 of the bracket 13, being vertically adjustable therein. The vertical rod 20 is provided at its lower end with a horizontal arm 22, and an electrode 70, consisting of a pair of clamping jaws 71 and 72, is attached thereto by means of aclamp '73. The lower fixed jaw'7l is provided with studs 74, to which the movable jaw 72 is pivoted. The inner end of the movable jaw 72 is provided with a cam 75, havinganactuating insulated handle 76. The rod 20 is provided at its lower end with a forwardly extended arm 26, and a bracket 80 is attached thereto by the clamp 81. The bracket 80 is provided with ways on which a slide 82 is adapted to move. This slide carries two vertical lugs 82, which supportapivot pin 83. A pair of tongs composed of two crossing arms or jaws, St and 85 are pivoted on the pin 83. These tongs constitute the other electrode of the apparatus, the lower jaw 85 being provided with a contact roller 86 and the upper jaw 8a with a contact roller 87, one of said rollers being composed of copper and the other of carbon. A contractile spring 88 connects the upper rear end of the jaw 85 with the slide 82, and a short spring 89 connects the rear end of said jaw 85 with the rear end of jaw 84. These springs tend to hold the jaws closed and cause the roller to bite the blank to beheated, and permit them to adjust themselves to the varying thickness thereof, or tapering ends thereof. A lever 90, provided with a slot 91, is pivoted on a pivot pin 92, on the bracket 80. A stud 93, on the slide 82 projects into the slot 91, on the said lever, and on the movement of the lever the slide 82 is moved on the bracket, and the contact rolls made to engage or release a blank. In the use of this electric forge, a blank as 200 is inserted in the electrode, 70, and clamped there- 90 in. The lever 90, is then shifted and the slide 82 carrying the clamping tongs 8i and 85 is thrust forward and the contact rolls engage the end of said blank which may be beveled or tapered. The blank closes the circuit, 5 and the current passing through the blank heats it. The tongs may be readily shifted by the action of the lever 90, so as to bring the contact rolls in contact with the tip end of the bar or blank, and they automatically zoo close upon said blank. Sliding and automatically adjusting electrodes may be em-- ployed for both contacts, if desired, as shown in Fig. 4.

This application is a division of application, Serial No. 407,900, filed October 6, 1891, patented December 20, 1892, No. 488,466.

We claim as our invention 1. In an electric forging apparatus, the combination of a pair of tongs provided with contact rollers, a slide plate Which supports said tongs, a support for said slide plate, means for shifting said slide plate on its supports, another electrode, and conductors for connecting said electrodes with the source of a heating current.

2. An electrode for an electric forge, consisting of a pair of tongs provided with conductive contact rolls, a slide plate for supporting said tongs, and a bed in which said slide plate moves.

3. In an electric forging apparatus, the com bination of a bracket connected with one electric pole, a slide plate movable on said bracket, a pair of tongs pivoted on said slide plate, means for closing said tongs, a slotted lever pivoted to said bracket and engaging said slide plate, and another electrode connected with the opposite electric pole.

4. In an electric forging apparatus, the combination of two slide plates, supports for said slide plates connected to opposite electric poles, a pair of tongs mounted on each slide plate, means for automatically closing the jaws of said tongs, and means for sliding said slide plates on their supports, substantially as set forth.

GEO. D. BURTON. EDWIN E. ANGELL. Witnesses:

HORTON RIDEOUT, F. W. J ONES.

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