Improvements in or connected with Electric Fittings, such as Fuse Blocks, Ceiling Roses, Switches, and the like.
Year: 1892

page_text: Date of Application, 14th May, 1892
Complete Specification Left, 14th Feb., 1893-Accepted, 25th Mar., 1893
PROVISIONAL SPECIFICATION.
Improvements in or connected with Electric Fittings, such as Fuse
Blocks, Ceiling Roses, Switches, and the like.
We, PERCY GARNISS EBBUTT, and JOHN BENJAMIN VERITY, both of Plume
Works, Aston, Warwickshire, Electrical Engineers, do hereby declare the nature
of this invention to be as follows:-
This invention consists of the hereindescribed improvements in or connected with
electric fittings such as fuse blocks ceiling roses, switches and the like.
In some of the fuse blocks ceiling roses, switches and the like as now made the
terminals and conducting screws and other parts in circuit pass through the base
and come into contact with the wall thereby sometimes causing the electric current
to escape to earth. This defect it is the object of our invention to overcome and
this we accomplish as follows:-
According to this invention we provide a loose bar or block of china or other
suitable non-conducting material made separate from the base of the fuse block,
ceiling rose, switch or the like this said bar or block being held entirely above,
below or otherwise away from the base by the conducting wires which are fixed to
the said loose bar or block by the terminal cramps and screws or by other means,
or the said bar or block may be supported on a pillar or pillars rising from the base,
or be carried upon independent blocks which rise from and are fixed to the base or
to the wall or other suitable place.
Dated this 12th day of May 1892
CHARLES BOSWORTH KETLEY,
Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in or connected with Electric Fittings, such as Fuse
Blocks, Ceiling Roses, Switches, and the like.
We,
PERCY GARNISS EBBUTT, and JOHN BENJAMIN VERITY, both of Plume
Works, Aston, Warwickshire, Electrical Engineers, 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 :-
This invention consists of the hereindescribed improvements in or connected with
electric fittings such as fuse blocks, ceiling roses, switches and the like.
In some of the fuse blocks, ceiling roses, switches and the like as now made the
terminals and conducting screws and other parts in circuit pass through the base
and come into contact with the wall thereby sometimes causing the electric current
to escape to earth. This defect it is the object of our invention to overcome and
this we accomplish as follows:-
According to this invention we provide a loose bar or block of china or other
suitable non-conducting material made separate from the base of the fuse block,
ceiling rose, switch or the like this said bar or block being held entirely above,
below or otherwise away from the base by the conducting wires which are fixed to
the said loose bar or block by the terminal cramps and screws or by other means
or the said bar or block may be supported on a pillar or pillars rising from the
base, or be carried upon independent blocks which rise from and are fixed to the
base or to the wall or other suitable place.
The accompanying drawings to which we will now refer, illustrate various forms
of the said fuse blocks, ceiling roses and the like with this invention applied.

page_text: The same letters of reference indicate the same or corresponding parts in all the
figures.
Fig. 1 is an elevation and Fig. 2 is a plan of a single pole fuse block A suitable
for fixing to a wall or other place; B is the said loose bar or block of china or
other suitable non-conducting material (shewn separately by Fig. 3) which is made
separate from the base A and held entirely away from the same as shewn by the
two conducting wires which pass through the holes a' a' in the block A and are
fixed to the loose bar or block B by the terminal cramps and screws C¹ C' which
latter also hold the fuse piece d as is usual. As the terminal cramps and screws C¹ C³
and other parts in circuit do not pass through the base to come into contact with
the wall or other part leading to earth but are by the bar or block B entirely
detached therefrom it is impossible for the electric current to escape to earth.
Figs. 4 and shew another form of single pole fuse block with our invention
applied. In this case the loose bar or block B (shewn separately by Fig. 6) is
carried from the base A by a pillar E which is formed with the base. This pillar E
has a transverse hole e through which the bar or block B passes and the pillar is or
may be screwed as shewn for the attachment of the usual cap or cover.
Figs. 7, 8 and 9 illustrate another method of carrying out this invention as applied
to a double pole fuse block. Figs. 7 and 8 are side and end elevations respectively
of the said block and Fig. 9 is a sectional plan of the same. In this example of
our invention the said loose block B is made with a central hole and is threaded on
to the pillar E of the base A and has holes
for the attachment of the
terminals. The pillar E is made with a collar e' on which the block B rests at the
proper distance above the base A as shewn.
and 9 it is shewn
Fig. 10 is an elevation and Fig. 11 is a plan of a ceiling rose block A with the
loose block B applied on the pillar E in a similar manner to that hereinbefore
described with reference to the fuse block shewn by Figs. 7, 8 and 9.
The shape
of the loose block B is immaterial; in Figs. 1, 2, 3, 4, 5, 6, 7,
rectangular and in Figs. 10 and 11 it is shewn somewhat of a triangular form.
Figs. 12 and 13 are respectively an end elevation and a plan and Figure 14 is
a side elevation of a main fuse block illustrating another method of applying our
invention in the form of two loose independent blocks B B' made of china or other
non-conducting substance as above stated and inserted between the base A and the
wall or other place to which the block A is fixed so as to prevent the base A
being in contact therewith. The fixing screws g'o' pass through the base A and
blocks B B into the wall. This method of applying the blocks such as B B' to a
main fuse block can be similarly applied to other fuse blocks.
Figs. 15, 16, 17 and 18 shew our said invention applied to a wall block or
connection for a portable lamp or for other like purpose where the portable
conducting wires have to be temporarily in connection with the fixed conducting
wires. Fig. 16 is a sectional elevation and Fig. 18 is a plan of the wall block or
base A made with a recess k having a ledge L on which the edges of the loose
block B rest. As in the other examples of our said invention above described
the terminals C₁ C' are fixed to the loose block B and are not in connection with
the base A. The detachable part of the connection which forms no part of this
invention and which carries the terminals of the portable conducting wires, is shewn
separately in elevation and in plan by Figs. 15 and 17 respectively.
Our said invention is applied to switch blocks and other like electric fittings in
any of the ways hereinbefore described and illustrated by the accompanying
drawings as applied to fuse blocks and ceiling roses.
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. The herein described improvements in or connected with fuse blocks, ceiling
roses, switches and other like electric fittings to prevent the electric current
leaking to earth through the terminals and other parts in circuit and the wall or

page_text: other part to which the fuse block or other said fitting is fixed, the said improve-
ments consisting in carrying the terminals and other parts of the fuse block or
other said fitting which are in circuit by an independent bar or block or bars or
blocks of insulating material in any of the several ways substantially as herein-
before set forth so that the said terminals and other parts in circuit cannot come in
contact with the wall or other part to which the base of the fuse block or other
said fitting is fixed, substantially as hereinbefore set forth.
2. In combination with the base of a fuse block the use of a loose bar or block
such as B of insulating material supported by the electric conducting wires and
carrying the terminals and cramping screws and fuse for the purpose and sub-
stantially as herein before described and illustrated by Figs. 1 and 2 of the
accompanying drawings.
3. In combination with the base of a fuse block the use of a loose bar or block
such as B of insulating material supported and carried by passing through a pillar
formed on the said base, the said bar or block carrying the terminals and cramping
screws and fuse for the purpose and substantially as herein before described and
illustrated by Figs. 4 and 5 of the accompanying drawings.
4. In combination with the base of a fuse block the use of a loose bar or block
such as B of insulating material supported and carried by being threaded on to a
pillar formed on the said base, the said bar or block carrying the terminals and
cramping screws and fuse for the purpose and substantially as hereinbefore
described and illustrated by Figs. 7, 8 and 9 of the accompanying drawings.
5. In combination with the base of a ceiling rose the use of a loose bar or block
such as B of insulating material supported and carried by being threaded on to a
pillar formed on the said base, the said bar or block carrying the terminals and
cramping screws and fuse for the purpose and substantially as hereinbefore
described and illustrated by Figs. 10 and 11 of the accompanying drawings.
6. In combination with the base of a fitting for a portable electric connection
the use of a loose block such as B of insulating material supported and carried by
fitting in a recess in the said base, the said bar or block carrying the terminals and
cramping screws for the purpose and substantially as hereinbefore described and
illustrated by Figs. 16 and 18 of the accompanying drawings.
7. In combination with the base A of a fuse block or switch block or other like
electric fitting carrying the terminals and cramping screws, the blocks such as B B¹
of insulating material applied between the said base A and the wall or other part
to which the said fitting is fixed, for the purpose aud substantially as hereinbefore
described and illustrated by Figs. 12, 13 and 14 of the accompanying drawings.
Dated this 13th day of February 1893.
CHARLES BOSWORTH KETLEY,
Agent for the Applicants.