Improvements in Casings for Electric Cut Outs.
Year: 1888

page_text: Date of Application, 11th Dec., 1888
Complete Specification Left. 12th Aug., 1889--Accepted, 19th Oct., 1889
PROVISIONAL SPECIFICATION.
[Communicated from abroad by SIGMUND BERGMANN, of 292, Avenue B, City and
State of New York, United States of America, Manufacturer.]
Improvements in Casings for Electric Cut Outs.
I, HENRY HARRIS LAKE of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex, do hereby declare the nature of
this invention to be as follows:-
Heretofore the covers of casings for electric cut outs have been made of the same
material as that employed for the manufacture of the bodies of the casings. This is
objectionable because the covers must be removed wherever it is necessary to locate
breaks within the cut-outs. It is also additionally objectionable when the material is
frangible as, for instance, porcelain, because it is then liable to breakage by or from
the act of removal.
My improvement consists in the combination with the body of the casing of an
electric cut out of a transparent incombustible cover. This cover will preferably be
mica. The body of the casing may be advantageously made with a rabbeted upper
or front edge and the transparent cover will then be fitted into the same and secured
by screws or otherwise.
Dated this 11th day of December 1888.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Casings for Electric Cut-outs.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
4
Heretofore the covers of casings for electric cut outs have been made of the same
material as that employed for the manufacture of the bodies of the casings. This is
objectionable because the covers must be removed wherever it is necessary to locate
breaks within the cut outs. It is also additionally objectionable when the material is
frangible as, for instance, porcelain, because it is then liable to breakage by or from
the act of removal.
My improvements consist in the combination with the body of the casing of an
electric cut out of a transparent incombustible cover. This cover will preferably be
mica. The body of the casing may be advantageously made with a rabbeted upper or
front edge and the transparent cover will then be fitted into the same and secured by
screws or otherwise.
In the accompanying drawing Figure 1, is a plan view of a double wire cut-out
having a casing embodying my improvements.. Figure 2 is a transverse section
thereof. Similar letters of reference designate corresponding parts in both figures.
As the improvements may be applied to an electric cut out of any style it is not
deemed necessary to enter into a detailed description of the cut out which I have
illustrated.
A designates the base or casing of porcelain or other incombustible material,
which is designed to be secured to a wall or ceiling in any advisable manner and
having therein the circuit posts or plates, B, which are connected in the usual
manner by the safety catches. C.

page_text: The case has its edges projected and rabbeted as shown at, D, forming a support
for the transparent cover, E, which is held in place by means of screws, a, engaging
threaded openings in the case.
It is obvious that the cover may be otherwise secured or supported without
departing from the spirit of my invention.
The cover, E, may be made of any diaphanous, incombustible material; such as
glass, the primary object being to render the safety catches and other parts of the
cut out visible without removal of the cover. I prefer, however, to use inica, as it is
less liable to fracture and will stand the heat without warping.
Having thus particularly described my invention and in what manner the same is
to be performed as communicated to me by my foreign correspondent I declare that
what I claim is
1. In an electric cut out, the combination with the case or base, of a diaphanous
cover, substantially as specified.
2. In combination with an electric cut out case, a transparent, incombustible cover,
substantially as specified.
3. In an electric cut out, the combination with the case of the mica cover therefor,
substantially as specified.
4. In combination with the cut out, the casing having the outstanding rabbeted
edge and the transparent cover secured thereto, substantially as specified.
Dated this 12th day of August 1889.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.