An Improved Electrical Cut-out or Fuse.
Year: 1899

page_text: Date of Application, 4th Mar., 1899
Complete Specification Left, 20th Apr., 1899-Accepted, 27th May, 1899
PROVISIONAL SPECIFICATION.
An Improved Electrical Cut-out or Fuse.
FREDERICK WILLIAM HEATON and HARRY SMITH, both of Salford Switch
Works, Sidney Street, Salford, Electrical Engineers, do hereby declare the nature
of this invention to be as follows:-
Fusible cut out for high voltage electrical circuits. 3 views are shewn on
accompanying drawings, viz. No. with cover (external view). No. 2 plan of
base. No. 3 end view shewing cover in section. Also two (B) views are shewn
of terminal, complete with screws. The terminal are let into the porcelain
wall or projection shewn. Only the fuse screws & terminal screws protruding,
a clear hole in wall for cable, or main, pinching screw, holds the terminals in
position, thus hiding or isolating the whole of the terminals. The fuse is affixed
to each of the larger headed screws, passing along the outside walls & turning
sharply into a V cavity. By this method that portion of the fuse in V cavity
remains good when the other portion has fused. By this method no arc can
strike across terminals.
F. W. HEATON.
HY. SMITH.
FREDERICK WILLIAM HEATON and HARRY SMITH, both of Salford Switch
Works, Sidney Street, Salford, Electrical Engineers, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be parti-
cularly described and ascertained in and by the following statement:-
Our invention has reference to an improved method of insulating the terminals
of cut outs or fuses as shewn by drawings left with the Provisional Specification.
In view (1) the cut out is shewn with cover on. View (2) is a plan of base
shewing the connecting cable holes, also the terminals which are let into the
porcelain projection on screwed base, & isolated with the exception of the pinching
screws also an insulated wall is shewn between the smaller headed pinching screws.
The fuse wire is taken from larger headed screws, round wall into a V cavity as
shewn. View (3) shews end view of base which is entirely constructed of por-
celain or other insulating material-with cover in section. Two views are
shewn of the terminals (B) with screws in position. The pinching screw for
cable connection viz.: the smaller headed one holds the terminal in position by
going first through hele in porcelain before entering terminal.

page_text: The larger headed screws (are to affix the fusible.wire), which when in position
in base project outside the wall or porcelain projection on base. The con-
nections by cable are made by bringing same through base in the tapered holes,
to holes in terminals & pinched by the smaller screws.
By these methods the metal terminals are isolated by being enclosed in the
porcelain or insulated chambers & no arc can form' between them. The fuse wire
passes along the outside walls at each end into a V cavity as shewn.
When fusing
the wire in the cavity is rarely-fused by this method. If the whole fusible wire
does fuse it cannot form an arc between the terminals by the aforementioned
method of isolating them in recessed insulated chambers. The terminals are
let into the recesses & held in their correct position by the cable wire pinching
screw.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is
-
(1) An improved terminal for high voltage or other cut outs, fuses or the
like as described & illustrated by drawings left with Provisional Specification
& the method by which the same is affixed in the insulated base of the cut out.
(2) In an electric fuse or cut out having a V cavity for the centre portion
of the fusible wire substantially as hereinbefore described.
(3) In an improved fusible cut out having the terminals for connecting the
cables & fuse wire, enclosed in porcelain or other insulating material & held in
position by the pinching screws, substantially as herein before described.
(4) An electric cut out or fuse constructed as herein before described & illustrated
in the drawings left with Provisional Specification.
Dated this 18th day of April 1899.
FREDERICK WILLIAM HEATON.
HARRY SMITH.