Improvements relating to Fusible Electric Cut-outs
Year: 1899

page_text: Date of Application, 13th Apr., 1899
Complete Specification Left, 15th Jan., 1900-Accepted, 17th Feb., 1900
PROVISIONAL SPECIFICATION,
Improvements relating to Fusible Electric Cut-outs,
I, HORACE GEORGE CALTHROr, Barrister, of 49, Stanley Gardens, South
Hampstead, in the County of London, do hereby declare the nature of this
invention (which has been communicated to me from abroad by Charles E.
Peebles, A.I.E.E., Electrical Engineer, Box 206, Bloemfontein, Orange Free
State, South Africa) to be as follows:-
My invention relates to fusible electric cut-outs. These cut-outs are preferably
placed as near as possible to the lamps they protect, and holders hitherto employed
to carry the fusible wires are of such construction as necessitates their being
often placed in inaccessible positions. It is the object of my invention to
provide a cut-out or holder therefor adapted to be suspended and fixed together
with or adjacent to the lamp or lamps to be protected and so as to be easier of
access for renewal or the like than heretofore.
My improved cut-out or cut-out holder consists of a body of suitable non-
combustible insulating material preferably cylindrical or elongated in shape,
and having longitudinal recesses or spaces cut or moulded therein for approxi-
mately its entire length to receive the fuse wires which are attached at or
near each end of said recesses to metal contact pieces; to these contact pieces
the service mains or leads, after passing through holes or slots in the ends of the
body are connected in any convenient or known manner. Upon one end of said
body I form or fix a screwed socket upon which is screwed a cord-grip ring such
as is used with ordinary lamp-holders and flexible pendants, and through this
ring the leads pass to their respective terminals. At the other end of said body
I form or fix a similar screwed socket to receive the ordinary lamp holder, or the
socket itself may form the lamp holder. An ornamental cover or casing of
suitable and non-combustible material is made to slip over the entire length
of the body and to be fixed by means of a bayonet joint or otherwise con-
veniently. The arrangement described is one for use with flexible pendant-lamps
but it may be readily applied to any electrolier or group of fixed lamps by.
altering the upper and lower sockets so as to fit into the tubular stem of
the said electrolier at or near that part to which the branching lamp-brackets are
fixed, and it will be seen that with slight alterations in length and size my
improved cut-out may be made single, double or triple pole and to carry any
number of separate fuses and to suit any voltage.
It will be seen that by the improved construction described the cut-out is
adapted to be placed as near as possible to the lamp or lamps it protects and in
a readily accessible position nearer the ground or floor level than those at
present in use.
Dated this Thirteenth day of April 1899.
J. C. CHAPMAN & Co.,
Agents.

page_text: :
Improvements relating to Fusible Electric Cut-outs.
1, HORACE GEORGE CALTHROP, Barrister, of 49, Stanley Gardens, South
Hampstead, in the County of London, do hereby declare the nature of this
invention (which has been communicated to me by Charles E. Peebles,
A.LE.E., Electrical Engineer, Box 206, Bloemfontein, Orange Free
State, South Africa) and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
.
My invention relates to fusible electric cut-outs. These cut-outs are preferably
placed as near as possible to the lamps they protect, and holders hitherto employed
to carry the fusible wires are of such construction as necessitates their being
often placed in inaccessible positions. It is the object of my invention to
provide a cut-out or holder therefor adapted to be suspended and fixed together
with or adjacent to the lamp or lamps to be protected and so as to be easier of
access for renewal or the like than heretofore.
I will describe my invention in reference to the accompanying drawing in
which Fig. 1 is an elevation of a pendant electric lamp holder having my improved
cut-out holder applied thereto. Fig. 2 is a sectional elevation of the cut-out
holder. Fig. 3 is an elevation partly in section at right angles to Fig. 2. Fig. 4
is a section on line 1-2 of Fig. 2, and Fig. 5 is a section on line 2-3 of
Fig. 8.
My improved cut-out or cut-out holder consists of a body A of suitable
non-combustible insulating material preferably cylindrical as shown or elongated
in shape, and having longitudinal recesses or spaces a cut or moulded therein
for nearly its entire length to receive the fuse wires which are attached to or
make contact with metal terminal pieces e at or near each end of said recesses.
In the form illustrated the terminal or contact pieces are made resilient to
receive between them a porcelain bridge which slides between projections a² ²
on the body and carries the fuse wire in a groove in its under face whilst
the ends of the fuse project and make contact with the terminals c. To these
contact or terminal pieces one or more of the service mains or leads after
passing through holes or slots e el in the ends of the body are connected in any
convenient or known manner for instance by binding serew f. Upon one end of
the body I form or fix a screwed socket y upon which is screwed a cord-grip
ring such as is used with ordinary lamp-holders and flexible pendants, and
through this ring the leads pass to their respective terminals. At the
other end of the body I form or fix a similar screwed socket to receive the
ordinary lamp holder j. or in some cases the socket i itself may be so made
as to form the lamp holder. An ornamental cover or casing k of suitable and
non-combustible material is made io sip over the entire length of the body a and
to be fixed by means of a bayonet joint or otherwise conveniently. The arrange
ment described is one for use wh flexible pendant-lamps such as illustrated in
Fig. 1 where m is the lamp and shade holder screwing into the socket i of the
cut-out holder. As will be seen from the drawing by the improved construction
and arrangement, the cut-out is adapted to be placed as near as possible to the
lamp or lamps it protects and in a readily accessible position nearer the ground or
floor level than those at present in use.
•
A cut-out constructed as described may also be readily applied to any
electrolier or group of fixed lamps by altering the upper and lower sockets g
and i so as to fit into the tubular stem of the said electrolier at or near that part
to which the branching lamp-brackets are fixed, or instead of a lamp holder at
one end a cord-grip ring may be provided at both ends so that a portion of the

page_text: suspending wires may intervene between the cut-out and lamp. It will be seen
that with slight alterations in length or diameter or number of recesses and
contacts my improved cut-out may he made single, double or triple pole, and to
carry any number of separate fuses, and to suit any voltage.
Having now particularly described and ascertained the nature of my said
invention (as communicated to me from abroad) and in what manner the same
is to be performed, I declare that what I claim is
1. The improved electric cut-out or cut-out holder comprising the combination
with a non-conducting body adapted to carry the fuse wire or wires of a socket
or a cord-grip ring at one end of said body and a socket or holder for the lamp
at the other end, a suitable intermediate cover being provided, all substantially
as and for the purpose set forth.
2. The combination of parts comprising the improved electric cut-out holder
adapted to be fitted to a lamp or group of lamps or an electrolier, substantially
in the manner set forth.
8. The improved electric cut-out holder constructed, arranged and adapted for
use substantially in the manner described and as illustrated in the accompanying
drawings.
For the Applicant,
J. C. CHAPMAN & Co..
Chartered Patent Agents, 70, Chancery Lane, London, W.C.