A New or Improved Fitting for Electroliers.
Year: 1889

page_text: Date of Application, 3rd June, 1889-Accepted, 6th July, 1889
COMPLETE SPECIFICATION.
A New or Improved Fitting for Electroliers.
We WILLIAM WINSTANLEY STRODE of 48 Osnaburgh Street, and WILLIAM DAVIS,
of New Court, Throgmorton Street, both of London in the county of Middlesex,
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 has for its object to provide a compact and efficient fitting or device
applicable to electroliers or swinging pendent electric lamps by which the lights may
be easily turned on or off and which will not be affected by the swinging motion, and
to this end we combine together a universal joint and an electrical switch.
The invention is illustrated in the accompanying drawings in which Figure 1 is an
outside elevation of the fitting in position; Figure 2 is a section through centre
thereof showing contacts made. Figure 3 is a plan of the lower section on line y―z
figure 2 and Figure 4 is an inverted plan of the upper section.
The body is made hollow in two parts A A¹ of brass or suitable material screwed
together. The upper part A has a screw a for affixing (at ceiling level) to the usual
pipe carrying the leads 11; the lower part A' is cup shaped internally and in it is
fitted a half ball B with hollow shank 6 also having a screw or connection for the
pendent or electrolier E. In the part A is fixed an insulating block I having two
contact pieces cc to which are fixed by screws or otherwise the wires ll. In the inner
part of the half ball B also is fixed an insulating block I¹ upon which are secured the
spring terminals tt to the plates of which are connected the wires passing through
the hollow shank b. The spring terminals t t are of any suitable type, the range of
motion allowed to their contact points being sufficient to compensate for any motion
that can be given to the cup and ball joint.
When in the position shown in figure 2 contact is made between the terminals t t
and contacts c c and the circuit is closed. In order to open it it is only required to
give sufficient turning motion to the terminals t t to carry them off the contacts c c on
to the insulating block I, to such a position as is shown at c¹ c¹ figure 4. This action
may be readily effected by simply turning the ball B in its cup A¹ by means of the
electrolier E and to limit its motion a stop is fixed on one part (as at s on B) which
works in a groove formed in the body of the other part (as at ŕ in A) or in a ring R
fixed therein for the purpose as illustrated.
By the use of fittings constructed as above described in a place where many
electroliers are employed should any one not be required it may readily be thrown out
of circuit without disturbing the rest.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what
we claim is :-
1. A fitting for electroliers consisting of a hollow body in two parts into one of
which the electric leads are passed and secured to fixed terminals in an insulating
block and the other having an universal joint such as is specified with which are
combined spring terminals connected to the lamp wires and adapted to make and break
electric circuit on a turning, motion being given to the joint substantially in the
manner set forth.
2. The new or improved device substantially as described and illustrated.
Dated this 2nd law of Tn 1000
J. C. CHAPMAN,
Fel. Inst. Patent Agents, 70 Chancery Lane, London, W.C.