Improvements in Arc Lamps.
Year: 1896

page_text: Date of Application, 12th Feb., 1896
Complete Specification Left, 24th Aug., 1896-Accepted, 26th Sept., 1895
PROVISIONAL SPECIFICATION.
Improvements in Arc Lamps.
We, ANNIE TAYLOR SCHMIDT, no occupation, and FREDERICK THOMAS
SCHMIDT, Electrical Engineer, both of 4 Clarendon Street, Bradford, in the
County of York, do hereby declare the nature of this invention to
follows:-
This invention relates to improvements in the construction and arrangement of
the mechanism of electric arc lamps for automatically regulating the distance
between the carbons-or length of the arc-whereby a steady and uniform light is
maintained.
It consists as follows:-Upon a plate or platform at the upper end of the lamp
suitable pivot bearings are provided upon which are carried a combination of levers
and also a pulley. This pulley is first mounted in a lever like frame, to the one
end of which is further hinged a brake lever, such brake lever extending forward
of the pulley in such a manner that its outer end may be coupled or connected to
the core of a solenoid. In the said pulley is cut one, two or more grooves, and
corresponding to these grooves, a cord or cords are secured at their one end the
lever frame, passing thence around the groove or grooves of the pulley with their
other end secured to the front of the brake lever, in such a manner that when the
front end of the said lever is brought downwards these cords are tightened upon or
bind the said pulley so that it is rotated therewith to the same extent. A further
groove is made in the pulley around which passes the cord which is connected at
the one end to the upper carbon moving parts, and at the other to the lower carbon
parts, suitable pulleys being used as and where necessary for the guidance of
this cord. Hinged upon the lever frame preferably at a short distance laterally
from the central bearing for the pulley &c. is carried a weighted lever, whose rear
is weighted, while its front engages below the brake lever so as to impart to the
latter an upward tendency to the core that is to effect a certain amount of balance
to the mechanism.
Hence when the core is drawn down-by the influence of the main coil,-the
brake cord or cords are tightened in the grooves of the pulley and thus causes the
pulley to partly rotate therewith and in so doing the two carbons are drawn apart
the required distance to form the arc. As the space between the two carbons
however becomes greater the decreasing influence of the main coil and the
increasing influence of the shunt coil causes the core to be drawn in the opposite
direction, and in so doing the tightness of the brake cords is released, and thus
permits of the automatic approach by gravitation of the two carbons to the necessary
distance of the arc.
Thus by these means the constant automatic adjustment of the arc is effected.
Dated this 11th dow of Fahru 1806
CHARLES T. POWELL,
Applicant's Agent.

page_text: AIC Нашро.
We, ANNIE TAYLOR SCHMIDT, no occupation and FREDERICK THOMAS
SCHMIDT, Electrical Engineer, both of 4 Clarendon Street, Bradford, in the
County of York, 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 relates to improvements in the construction and arrangement of
the mechanism of electric arc lamps for automatically regulating the distance
between the carbons-or length of the arc whereby a steady and uniform light is
maintained.
an
In order to more clearly describe this our invention we have appended hereunto
illustrative sheet of drawings upon which are figures and numbers of
reference, similar numbers referring throughout the several views to the same thing
or part.
Fig. 1 is a general side view of the invention.
Fig. 2 is a front view of the invention, that is to say, a view at right angles to
that seen in Fig. 1:
Fig. 3 is a plan view.
Fig. 4 is a sectional plan view on line A-B Fig. 2.
Figs. 5 and 6 are side and plan views in detail of the lever like pulley frame
hereinafter described..
The invention consists as follows:-Upon a plate or platform 9 at the upper
end of the lamp, suitable pivot bearings 10 are provided upon which are carried a
combination of levers and also a pulley 11: This pulley is first mounted in a lever
like frame 12, to the one end 18 of which is further hinged a brake lever 14'such
brake lever extending forward of the pulley in such a manner that its outer end 15
may be coupled or connected to the core 16 of a solenoid 17. In the said pulley 11
is cut one, two or more grooves, and corresponding to these grooves, a band, tape,
chain or cord or cords 18 are secured at their one end to the lever fraine at 19
passing thence around the groove or grooves of the pulley with their other end
secured to the front of the brake lever at 20, in such a manner that when the front
end of the said lever 14 is brought downwards these cords are tightened upon or
bind the said pulley so that it is rotated therewith to the same extent.
A farther
groove is made in the pulley around which passes the cord 21 which is connected
at the one end 22 to the upper carbon moving parts, and at the other end at 23 to
the lower carbon parts, suitable pulleys 24 being used as and where necessary for
the guidance of this cord. Hinged at 25 upon the lever frame 12 preferably at a
short distance laterally from the central bearing for the pulley &c. is carried a
weighted lever 26 whose rear end is weighted by the weight 27 while its front end
engages with the brake lever 14 by means of the link 28 so as to impart to the
lever 14 an upward tendency to the core 16 that is, to effect a certain amount of
balance to the mechanism.
Hence when the core 16 is drawn down-by the influence of the main coil 29-
the brake cord or cords 18 are tightened in the grooves of the pulley and thus
causes the pulley to partly rotate therewith, and in so doing the two carbons 30
and 31 are drawn apart the required distance to form the arc.
As the space
between the two carbons however by consumption becomes greater, the decreasing
influence of the main coil 29 and the increasing influence of the shunt coil 32
causes the core 16 to be drawn in the opposite direction that is, upwards, and in so
doing the tightness of the brake cords is correspondingly released, and thus permits

page_text: of the automatic approach by gravitation of the two carbons to the necessary
distance of the arc.
Thus by these means the constant automatic adjustment of the arc is effected.
Having now particularly described and ascertained the nature of this our said
invention, and in what manner the same is to be performed, we declare that
what we claim is :-
1. In arc lamp mechanism the combination with the carbons 30 and 31, carried
from the pulley 11 by cord 21, and with the solenoid core 16, of the weighted
lever 26 connected to the brake lever 14 having cords 18 and thereby to the
frame lever 12, constructed and operating substantially as described and shown
upon the drawings.
2. In arc lamps the general combination and arrangement of the mechanism
herein described and shown upon the drawings by which the automatic adjustment
of the arc is effected.
Dated this 22nd day of August 1896.
CHARLES T. POWELL,
Applicant's Agent.