Improvements in Electrical Ceiling and Wall Connectors.
Year: 1895

page_text: Date of Application, 8th May, 1895-Accepted, 22nd June, 1895
COMPLETE SPECIFICATION.
Improvements in Electrical Ceiling and Wall Connectors.
We, CHARLES MARK DORMAN of Ordsal Electrical Works, Salford, in the
County of Lancashire, Electrical Engineer, and REGINALD ARTHER SMITH of
Ordsal Electrical Works. Salford, in the County of Lancashire, 'Electrical
Engineer do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described aud ascertained in and by
the following statement
Our invention relates to that class of electrical ceiling and wall connector in
which connections are made between hxed conductors and free conductors usually
flexible.
Our invention
consists 10 an improved method of attaching the flexible
conductors to the usulating base of the connector in such a manner that any
tension put on the flexible conductors is not transmitted to the point where the
flexible conductors are connected to the fixed conductors.
To carry out our invention we secure the flexible conductors to the insulating
base by means of a gripping cleat or cleats of porcelain or other non-conductor, oi
Consisting partly of metal and partly of a non-conductor attached to the base by
means of one or more screws studs or bolts in such a mauner that the flexible
conductors are gripped firmly between the cleat or cleats and the base of the
connector by tightening up the screws studs or bolts.
The diawings accompanying this Specification shew several suitable forms of
gripping cleat
Fig is the plan of the insulating base of a connector with simple cleat attached
by one screw.
Fig. 2 is the plan and Fig. 3 n section on the line W X. of a base with simple
cleat attached by two screws.
Fig. 4 is the plan and Fig. 5 a section on the line Y. Z. of a base with a cleat of
somewhat peculiar form attached by one screw.
Fig. 6 is an elevation of the same cleat viewed from the side Y.
In all the drawings A is the insulating base B is the cleat G. G. are screws
for attaching the cleat to the insulating base C. C. are flexible conductors.
D D. are terminals for the attachment of Hexible conductors. E. E are terminals
for the attachment of the fixed conductors and F is the fuzible wire usually
utioduced into circuit in this class of connector.
It will be seen that in all the connectors shewu the flexible conductors are passed
between the cleat and the insulating base before being connected to the terminals
and are gupped firmly between the cleat and the insulating base by tightening up
the screw or screws G. G. in such a manner that any tension put on the Hexible
conductors is not transmitted to the terminals D. D.
Studs or bolts with nuts may be used in place of the screws G. G. if desired.
It is obvious that in place of the single cleat shewn two separate cleats may be
used, one for each flexible conductor, with separate screws for cach. The cleats
may be made entirely of porcelain or other insulating substance on of metal with an
insulating liner to prevent the metal coining in contact with the Hexible conductor.
It will be seen that the cleat shewn in Figures 4, 5 and 6 is made of such a form
that it almost fills up the space within the contact plates to which the wies aro
attached, and that the flexible wires are passed through holes formed in the body
of the cleat before they are led away to the terminals.

page_text: There are two advantages gained by making the cleat of this form, firstly the
cleat. is stronger and better able to withstand the pressure of the screw, and
secondly it forms a screen between the fuze and the connections of opposite polarity
on the connector.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed we declare that what we
claim is
1. In electrical ceiling and wall connectors the method of securing the fiee
conductors to the insulating base by means of a gupping cleat or cleats of porcelain
or other non-conductor or consisting partly of metal and partly of non-conductor
attached to the base by means of one or more screws studs or bolts in such a
manner that the free conductors are gripped firmly between the cleat or clents and
the base of the connector by tightening up the screws studs or bolts.
2. The connector and cleat as a whole substantially as shewn in Figs. 4, 5, and 6
and described in the Specificatiou
Dated the 7th des of Me 1805
CHARLES MARK DORMAN.
REGINALD ARTHUR SMITHI.