US922917A - Electric terminal. - Google Patents

Description

G. C. LANDIS.

ELECTRIC TERMINAL.

APPLICATION FILED APB. s, 1907.

aff/WWA Patented May 25, 1909.

lll

UNITED STATES' -IATEN'I OFFICE.'-

GILBERT C. LANDIS,YOF YORK, PENNSYLVANIA, ASSIGNOR TO` AMERICAN PHOKSPHORUS COMPANY, OF CAMDEN, NEW JERSEY, A CORPORATION OF NEW JERSEY.

ELECTRIC TERMINAL.

.Specification of Letters Patent. l

I .Patented May 25, 1909.

Application led April 3, 1907. lSerial No. 886,152.

To all whom it may concern:

Be it known that I, GILBERT C. LANnIs, a citizen of the United States, residing in York, Pennsylvania, have invented certain Improvements in Electric Terminals, of which the following is a specification.

The object of my invention is to so construct an electric terminal, that the carbon electrode can be readily and firmly attached to the terminal and which is so designed that it will be prevented from becoming overl heated.

My invention is particularly adapted for use 1n connection with electric furnaces.

In the accompanying drawings, Fig-ure l, is

a vertical sectional view, illustrating my improved electric terminal with the carbon electrode attached; Fig. 2, is an inverted plan view of Fig. l Fig. 3, is a side View, showing my improved terminal applied to an electric furnace, and Figs. 4 and 5, are views, showing modifications of the invention.

A is a carbon electrode, in the present instance, circular in cross section, as illustrated in Fig. 2.

B is the terminal to which the electrode is attached. This terminal has a body portion B and a cap C. The body portion has a cavity a in its under side of any depth desired for the reception of the carbon electrode and the cavity is somewhat larger than the electrode so that when the carbon is placed in the electrode molten metal r of relatively low fusing point can be poured into the space between thc side walls of the cavity and the electrode so as to firmly secure the electrode to the terminal when the molten metal is set.

The body B of the terminal is made in the form of a cup with a ange b on its upper edge and the central portion b2, in which the electrode is mounted, projects up into the cup, as shown, and the cavity a is formed in this portion b2.. The cap C is secured to the body portion l) by bolts c; a gasket E being used when necessary so as to make atight joint to prevent the escape of water.

i is a water inlet pipe and i is a water outlet ipe. These water pipes i and i are attac ed to the supply and waste pipes by flexible connections so as not to interfere With the vertical adjustment of the electrode. Thus water is allowed to flow through the terminal and to ll the cup-like body portion B", keeping the wall of the portion b2 containing the electrode from becoming overheated.

Connection is made with the electric conductorthrough an arm b, which referably forms part ofthe body portion Iii and secured to this arm is a plate F having an opening f for the conductor and this plate is secured to the arm by a boltj" having a suitable nutfz.

In thepresent instance, projecting'from` each side of the ca C are extensions c in which are openings or the vertical guides C, illustrated 1n Fig. 3, and screwed into a boss c on the cap is a screw eye or hook c2 to Which can be attached a rope or cord assing to a drum or counterbalance weight or vertically adjusting the electrode carried by the terminal in respect to the fixed electrode in the furnace.

The vertical guides in the present instance are tubes which are slip ed over studs g projectingv from the plate supporting the lgas seal G. The upper ends of-thesetubular guides are secured to a beam C2 in any suit able manner. By this means the terminal is held in roper position in respect to the body of the ectric furnace, as clearly illustrated in Fig. 3.

I have shown in Fig. 3, the upper porticA of one form of electric furnace to which my invention can be applied, but it will be understood that my improved electric terminal can be used for any urpose without departing from the essential) features of my invention.

In Fig. 2, the carbon electrode is shown round and the terminal is circular, but in some instances the electrodes may be square in cross section, then I prefer to make the terminal square to fit the electrode, as shown in Fig. 4, although the opening for the reception of the electrode may be quadrangular and the other portions of the terminal may be of any shape desired.

In Fig. 5, I have shown a modification in which the end of the electrode A is threaded, as at a', and this threaded portion is mounted Within the cavity a of the terminal and metal in a molten state is poured around the threaded portion so as to retain the electrode in place.

hen long electrodes are used I preferably make them in sections; the threaded portion a of one section extending in a threaded cavity a2 in an adjoining section so that the sections can be readily coupled one to another and when one is worn away another can be substituted for it. This construction is clearly illustrated in Fig. 3.

1. The combination in an electric terminal, of a body ortion having a cavity in its under side for t e reception of an electrode, said body portion being in the forni of a cup to retain water, the part in which the electrode is heldextending into the cup, with an inlet and an outlet conduit in the body portion for cooling liquid, said liquid surrounding the portion to which the electrode is attached, with a cap closing the cup-shaped body portion and removable independently of said conduits, substantially as described.

2. The combination in an electric terminal, of a hollow body portion having its under side extended inwardly to form a cavity, an electrode mounted in the cavity and secured to the body portion, circulating pipes conimunicating with the body portion, an integral arm projecting from the body portion, a terminal late secured to the arm, and a cap detachab y secured to the body portion, substantially as described` 3. The combination in an electric terminal, of a iianged hollow body portion having a cavity in its under side, a carbon electrode mounted in the cavity, and metal introduced between the electrode and the terminal while in a fluid state, Water circulating pipes communicating with the interior of the body portion, a cap secured to the body portion having means by Which the terminal is suspended, with a terminal plate connected to the body port-ion independently of the cap, substantially as described.

4. The combination in an electric terminal, of a hollow body portion having a cavity in its under side, a carbon electrode mounted in the recess, said recess being of greater diameterl than the electrode, with soft metal introduced between the walls of the cavity and the electrode, circulating pipes entering the body portion, a cap plate secured to the body portion of the terminal and having perforated extensions, guide rods passing through the extensions, an arm on the body portion independent of the cap plate, and a terminal plate secured to the arm, substantially as described.

5. The combination of an electric furnace, a plate mounted on the furnace having an opening for the passage of an electrode, studs projecting from the plate, vertical guide rods mounted on the studs a supporting structure engaging the upper ends of said rods, a terminal mounted on the rods, and an electrode carried by the terminal, substantially as described.

In testimony whereof, I have signed my name to this speciiication, inthe presence of two subscribing witnesses.

GILBERT C. LANDIS.

Witnesses Jos. H. KLEIN, WM. A. BARR.

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