US 426156 A
Description (OCR text may contain errors)
(No Model.) F. G. WARRELL.
FUSE BLOCK. No. 426,156. Patented Apr. 22, 1890.
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UNITED STATES PATENT CEEICE.
FREDERICK G. IVARRELL, OF PHILADELPHIA, PENNSYLVANIA.
F U S E B LO C l( SPECIFICATION forming part of Letters Patent No. 426,156, dated April 22, 1890.
Application filed February S, 1890. Serial No. 339,049. (No model.)
To all whom, it may concern:
Beit known that I, FREDERICK G. WAE- RELL, of the city of Philadelphia, State of Pennsylvania, have invented a certain new and useful Improvement in Electric Cut-Outs; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, forming a part of this specification.
My invention has relation to electric cutouts; and it consists in a removable porcelain shell or casing snrmounting and surrounding an inclosed base or core of like material, upon which is secured by any suitable means the two ends-of the electric wires, set apart from each other, but connected by a fusible wire adapted to fuse at a given increased heat.
The object of my invention is to produce a safe, secure, and well-protected electric cutout adapted principally for electroliers and other electric fixtures as a preventive of hre.
In the accompanying drawings similar letters of reference referto similar parts throughout.
Figure l is a cross-sectional view of the device. Fig. 2 is a perspective view. S shows my device in the form of a double-pole cut-out.
A represents the porcelain shell surrounding the base or core B. The electric wires zu w are secured to the insulated porcelain base B upon a metal plate p p through the medium of the screws s s', which wires "fo w are connected by a light fusible wire f, which will fuse or melt when the current is increased to an extent that will produce a given excess of heat, and thus the circuit will be broken and danger at the terminus avoided. The fusible wire fmay be connected with the wires w w by any suitable means, such as by auxiliary plates e e', secured to the plates p p" by screws d2 CZ.
The porcelain shell or casing A is adapted to close and protect the extremities of the electric wires w w and their fusible eonnecting-wire f, secured upon the base or core B, and is preferably removably connected therewith, so that it may be removed and the parts exposed when desired, it being secured to the base by a screw t or other suitable means. An orifice o is preferably provided in the shell A over the fusible wire f to allow of the escape of gases or fumes when the wire f fuses or explodes. By thus providing this orifice o in the outer shell or casing A the fumes and gases in escaping are thus prevented froni 'injuring' the parts of the cut-out by the 'force of the explosion, which injury or destruction would occur were there no vent provided in the outer casing, as is the ease in many cut-outs heretofore invented.
An important feature of my invention 1s the combination of the removable sliding shell A on the base B, removable by a turn or two of the securing-screw t, and then simply sliding the shell off the base and exposing the parts fixed and secured as they are to the base B. In this manner a burned-out fuse may be readily renewed and a perfect connection insured before the sliding shell is replaced, which connection is in no way disturbed by the replacing of the shell.
I am aware that cut-outs having insulatingcoverings are old, and these I do not claim, broadly; but my invention consists in the specific construction described.
I have particularly described my device as applied to a single-pole cut-out; but it may also be constructed for a double or treble pole cut-out, as desired, as shown in Fig. 3.
Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-
l. In an electric cut-out, a solid base having secured thereon two ends of the electric conducting-wire, said ends connected by fusible eonducti11g-connection, in combination with a sliding porcelain shell or casing surrounding said base and parts thereof, said shell adapted to slide on the said solid base, exposing the same and the parts connected therewith in order to allow of an examination of the parts of the cut-out and to renew a burned-out fuse and insure a perfect contact before replacing the sliding shell, in the manner and for the purpose substantially as hereinbefere set forth and described.
2. In an electric cut-out, a sliding porcelain covering er protector surrounding a solid base and connections ol' the cut-out, protecting the parts from injury and danger from contact by imperfect insulation, said sliding removable covering removable from IOO said base at will, in the manner and for J[he purpose substantially as hercinbefore Set forth and described.
3. In an electric cut-out, :t porcelain shell 5 A, inclosed solid insulatingbase B, an electric fusible connection secured thereto conmeeting the ends of the electric Wires, said shell A adapted to slide on and off said base B, :md orifice provided in said shell to allow ro of the escape of fumes and gases occasioned by the explosion of the fusible connection f, substantially as hereinbefore set forth and described.
In witness whereof I have hereunto set my l hand this lst day of February, A. D. 1890.
FREDERICK G. WARRELL.
WM. L. NEVIN, HORACE PETTIT.