Improvements in Globe Holders for Enclosed Electric Arc Lamps.
Year: 1898

page_text: Date of Application, 18th May, 1898-Accepted, 18th June, 1898
COMPLETE SPECIFICATION.
Improvements in Globe Holders for Enclosed Electric Arc Lamps.
I, KARL WEINERT, of 18 d. Adıniralstrasse, Berlin, in the Empire of Germany,
Manufacturer, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascer-
tained, in and by the following statement :-
The arc lamps hitherto in use with air-tight and elastically fastened globes
underneath the frame plate have the disadvantage that the changing or attaching
and detaching of the globe cannot be effected so quickly, easily, and with such
security against breakage as is necessary for globes which are easily soiled and have
therefore to be cleaned frequently. This invention is intended to obviate the
foregoing disadvantage.
In the accompanying drawing Fig. 1 is a vertical section, of a globe and globe
holder constructed according to this invention Fig. 2 is an elevation at right angles
in relation to Fig. 1, Fig. 3 is an underside plan of a globe holder ring and Fig. 4
is a side view thereof.
The globe a employed is open at one end only where it is furnished with an outer
fastening edge a¹. The size of the globe is such that the lower carbon holder b
together with its bearer passes into it. The air tight, and at the same time elastic
fastening, is effected as follows: On the lower frame-plate c are two opposite
guides d, in which by means of spiral springs f bearing pins e are elastically
suspended. On the lower end of the pins e and sideways thereto rollers g are
mounted to rotate and above the rollers a projecting edge or border h, of suitable
height, is formed on the frame plate.
By means of a peculiarly shaped ring i the edge or rim a¹ of the globe is made
fast between the border h of the frame and the two rollers g. The ring i bears
against the underside of the border a¹ of the globe and has a thin outer edge or
border ¹, which is furnished with recesses k formed opposite to each other, likewise
with inclines and beyond this with projections m. The ring i, in which the
globe a is suspended being passed by means of the recesses over the rollers g
from below and placed against the frame plate c and axially rotated, the inclined
surfaces l, run up the rollers g, against the tension of the springs f, whereupon the
whole thickness of the edge or border comes to rest between g and h. The striking
of the projection m against the pins e limits the axial rotation of the ring i. The
globe a is thus pressed air-tight and elastically against the frame-plate.
Above
and below the edges a¹ of the globe, packing rings no made of asbestos or other
material are arranged.
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 enclosed electric arc lamps in which a globe encloses the carbons and carbon
holders and is open only above; detachably securing the globe in position by
means of an air tight elastic easily longened biolder comprising aring placed

page_text: under the upper edge a of the globe and furnished on its outer edge ¹ with
recesses k, inclined running surfaces l, and projections m, the ring i being made
fast, with the edge a¹ of the globe, between the frame plate c of the lamp and below
elastically seated supporting rollers g substantially as described.
2. The improvements in globe holders for enclosed electric arc lamps substantially
as described with reference to the drawings.