Improvements in Electric Arc Projecting Lanterns.
Year: 1899

page_text: Improvements in Electric Arc Projecting Lanterns.
I, LEO KAMM, of 27, Powell Street, Goswell Road, in the County of London,
Electrical Engineer, do hereby declare the nature of this invention to be as
follows: :-
This invention relates to electric are projecting lanterns and has mainly for
object to improve the construction and provide means for enabling the arc light
to be adjusted in position relatively with the condenser in a more simple and
expeditious manner than heretofore.
According to my invention I arrange for the longitudinal adjustment of the
arc by placing the lamp on a platform at the back of the lantern, the said plat-
form having connected thereto rods designed to slide in guides or bearings on
the lantern. Stops may be arranged on the rods to limit the backward move-
ment of the lamp.
For adjusting the are at an angle in a vertical plane to the condenser I form
the lamp frame in two parts hinged together, the one part carrying the carbons,
while the other part is attached to the platform herein before described.
For adjusting the arc laterally I provide for turning the lamp frame on a
vertical axis, the frame being provided with lugs on opposite sides of the axis
against which bear set-screws by adjusting which the frame can be turned.
The rods for supporting the carbons I form telescopic, whereby their length
can be adjusted, means such as set-screws being employed to fix the parts when
adjusted. For holding the carbons to the said rods I provide clips hinged to
the rods and having springs whereby the clips are always adapted to grip the
carbons, set-screws being employed for fixing the carbons in position.
I also arrange in connection with the arc lamp a series of resistances which
are conveniently placed beneath the base of the lantern, a sliding switch being
arranged in connection with the resistances so that according to its movement
more or less resistance can be put into the lamp circuit.
Dated this 3rd day of August 1899
Improvements in Electric Arc Projecting Lanterns.
I, LEO KAMM, of 27, Powell Street, Goswell Road, in the County of London,
Electrical Engineer, do hereby declare the nature of this invention and in what
[Price Sd1

page_text: in connection with the said coils 10 so that more or less resistance can be put
into the lamp circuit. The said switch slides upon and is guided by a rod w¹
connected to one of the terminals of the lamp circuit and is designed to make
contact with plates w³ at one end of the coils, which plates together with similar
plates at the other end of the coils connect the coils in
" series." y* is another
series of resistance coils connected in "series" by plates y and in electrical
connection with the coils w through the strip y. The coils w and y* are carried
by frames consisting of bars y of insulating material and rods y, the frames
being connected together by plates and suspended beneath the base b by
rods y.
z is a switch for switching on the current from the generator which
current enters at the terminal w³, passes through the rod w¹, the switch x', the
coils w between the said switch and the strip ya, the said strip, the coils y*, the
wire z to the switch z, the wire 2 from the switch z to the terminal ³, thence
to the lamp by a wire connected to one of the terminals k¹ and back from the
other terminal to the terminal 24, wire and terminal back to the
generator.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. In an electric arc projecting lantern a lamp frame in two parts hinged
together for adjusting the arc at an angle in a vertical plane substantially as
described.
2. In an electric arc projecting lantern a lamp frame arranged to turn on a
vertical axis to adjust the arc laterally and provided with lugs on opposite sides
of the axis in combination with set screws by adjusting which the frame can be
turned substantially as described.
3. In an electric arc projecting lantern rods for carrying the carbons formed
in parts telescoping together in combination with means for fixing the parts
together substantially as and for the purpose described.
4. In an electric arc projecting lantern the combination with the rods for
carrying the carbons of clips or bars hinged to the said rods and having springs
whereby the clips are caused to press and hold the carbons against the said rods,
and screws for causing the clips to hold the carbons rigidly substantially as
described.
5. The combination of parts forming the improved electric arc projecting
lantern hereinbefore described and illustrated in the annexed drawings.
Dated this 3rd day of May 1900.