An Improved Incandescence Lamp Mounting with Current Interruptor..
Year: 1889

page_text: Date of Application, 11th Sept., 1889-Accepted, 19th Oct., 1889
COMPLETE SPECIFICATION.
An Improved Incandescence Lamp Mounting with Current
Interruptor..
I, FRIEDRICH WILHELM ARNOLD, of the firm of Brandenburger and Arnold, of
Altona, in the Empire of Germany, Electrician, 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 incandescence lamps and consists in the combination of a
mounting of such lamp with a current disengaging device.
Referring to the annexed drawing,
Figs. 1 and 4 are front views and partial vertical sections.
Fig. 3 is a side elevation.
Fig. 4 a vertical section of Fig. 3, and
Fig. 5 a plan of the improved device.
A cylindric casing H is closed at the top by means of a plate P of volcanic fibre,
india-rubber or other suitable insulating material, which is secured by means of
screws ss in the casing, whose downwardly extending narrowed portion carries the
incandescence lamp G adapted to be easily introduced by means of a bayonet closing.
Two metallic hollow cylinders c are detachably secured by aid of four-edged adjoint
pieces in the plate P, the bores of said cylinders being at their upper end provided
with inner screw threads serving to receive the contact screws k, the heads of which
establish a metallic connection between the conducting wires and the hollow
cylinders c. The contact pins t are vertically displaceable in the lower space and
bottom of the latter, and held with their flanges in the lowest position by aid of
helical springs f. One of said pins is provided with a lateral pivot z projecting
outwardly through a slot in the hollow cylinder c and being surrounded with a loose
insulating tube or roll r.
The disengaging device consists of a shaft w having a handle or knob and being
lodged in a tube 6 provided on the casing H. The shaft w carries a lever h which,
on the turning of the shaft, lifts the contact pin provided with the pivot z off the
contact plate of the incandescence lamp, thereby interrupting the electric current,
whilst the other pin remains in contact with its appurtenant contact plate. To allow
the shaft w to be fixed in any desired position, a small pin o is provided thereon,
which is pressed by means of the spring situated within the tube, into corresponding
recesses at the rim of the latter.
The roll r made from insulating material rolls on the lever h for the purpose of
allowing of a uniform wear and precludes a transmission of the electric current to
the disengaging device. The cover D likewise connected by means of the screws &
referred to with the casing H is intended to protect the contact screws k from injury
and serves simultaneously with its screw-threaded neck a for securing the whole
device to the respective lamp holder.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
In a mounting, for incandescence lamps, provided with a disengaging device.
1) The combination of a casing H, an insulating plate P two hollow cylinders c,
contact screws R contact dins & and springs f substantially as and for the purpose set

page_text: 2) The combination of a recessed tube b, shaft w with pin o and springs f¹, lever h,
pivot z, contact pin t and insulating roll r, substantially as and for the purpose set
forth.
:
Dated this 11th day of Santambar 1800
F. W. ARNOLD.
Per Huelser & Co.,
142, Fleet Street, Attorneys.