Improvements in Electric Arc Lamps.
Year: 1898

page_text: Date of Application, 17th May, 1898
Complete Specification Left, 17th Feb., 1899-Accepted, 25th Mar., 1899
Improvements in Electric Arc Lamps.
We, Messrs. P. R. JACKSON AND COMPANY LIMITED, of Salford Rolling Mills,
Manchester, Engineers, and LourS CARL HENRY MENSING, of 11, Queen Victoria
Street, City of London, Electrical Engineer, do hereby declare the nature of this
invention to be as follows;-
This invention, which is based upon a previous patent granted to us, dated
21st day of September 1896, and numbered 20902, relates to a mechanical
appliance for automatically compensating the feeding mechanism of an arc lamp
when working under varying currents and whilst striking and burning clear
of the arc, also with or without a cut-out in combination.
The present invention consists of a weighted pendulum, catch, studs, and a
bracket, forming the automatic compensating mechanism.
The arrangement and working are as follows:-The weighted pendulum is
linked to the frame by means of a pin and acts on a stud attached to the stirrup.
The catch is linked by means of a pin to the pendulum, and passes through a
slot in the frame, or it can be linked independently to the frame similarly to the
pendulum.
When the current is switched on, the pendulum is gradually lifted by the stud,
drawing the catch back, which when the lamp reaches its feeding point, drops
by its own gravity behind the edge on the bottom of the slot, thus throwing the
compensator out of action.
Another stud, which is screwed into the carriage, disengages the catch as soon
as any variation in the current takes place, this again bringing the weighted
pendulum into action.
A bracket is screwed to but insulated from the frame, being together with
the said pendulum, provided with platinum contacts, which constitutes the cut-out.
We, Messrs. P. R. JACKSON AND COMPANY LIMITED, of Salford Rolling Mills,
Manchester, Engineers, and LoUIS CARL HENRY MENSING, of 11, Queen Victoria
[Price 8d.]

page_text: Street, City of London, Electrical Engineer, 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 which is based upon a previous patent granted to us, dated
21st day of September 1896, and numbered 20902, relates to a mechanical
appliance for automatically compensating the feeding mechanism of an arc lamp
when working under varying currents and whilst striking and burning the are
also with or without a cut-out in combination.
The present invention consists of a weighted pendulum, catch, studs, and
bracket as shown in the accompanying drawings, Figure 1 being a side elevation
of an arc lamp mechanism and Figure 2 a detail view of the present improvements
forming the automatic compensating mechanism.
The arrangement and working of the compensating mechanism is as follows:
the weighted pendulum A is linked to the frame by means of a pin C and is
acted upon by a stud D attached to the stirrup or cradle G referred to in our
former patent.
The catch E is linked by means of a pin F to the pendulum A and passes
through a slot H in the frame B, or it can be linked independently to the frame
similarly to the pendulum A. When the current is switched on, the pendulum A
is gradually lifted by the stud D, drawing the catch E back, and when the lamp
reaches its feeding point, its notch J engages with the edge K on the bottom
of the slot H, allowing the catch E to drop by its own gravity, thus throwing
the compensator out of action. Another stud L which is screwed into the carriage,
disengages the catch E as soon as any variation in the current takes place this
again bringing the weighted pendulum A into action. A bracket M is screwed
to but insulated from the frame B and together with the said pendulum A,
provided with platinum contacts, constitutes the cut-out.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is:
In an electric arc lamp, the improved automatic compensating mechanism,
consisting of weighted pendulum. A acted upon by a stud D, catch E connected
to pendulum A and working in slot H, said catch being disengaged by stud L, as
described and substantially as shown in the annexed drawings.
The 17th day of February 1800
R. CORE GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said P. R. Jackson & Co. Limited, and L. C. H. Mensing.