Lanterns for Photographers' Use.
Year: 1885

page_text: Lanterns for Photographers' Use.
We EDWARD MARLOW of Constitution Hill Birmingham in the County of
Warwick Photographic Camera Manufacturer and HENRY BISHOP of Great Charles
Street Birmingham aforesaid Silversmith do hereby declare the nature of the said
invention for IMPROVEMENTS IN THE CONSTRUCTION OF DARK ROOM LAMPS OR
LANTERNS FOR PHOTOGRAPHERS USE, to be as follows:-
These improvements refer to three points of much importance to operators in
Photography. First a shadowless framed lamp. Second the avoidance of great
heat, and thirdly the winding of the wick from the outside without turning the
lamp.
The first point I effect by using one sheet of bent glass of a ruby tint or other
tint which does not contain the blue or actinic ray, this bent glass extends round
the front and sides of the lamp from the metal frame on one side to that upon the
opposite side with no intermediate metal.
The second point the avoidance of heat is gained by packing the floor and the
surrounding sides of the lamp the burner and the funnel oil feeder with cork or
other suitable weak conductor of heat to prevent the possible combustion of
inflammable oils or spirits.
The third point I effect by making the spindle which is used for regulating the
wick pass through the side or front of the lamp and terminate in a thumb button
upon this spindle I apply a slide or telescopic action so that by drawing out the
key or portion carrying the thumb button the burner may be released when
required, then replaced the key portion pushed in and all is intact.
The improvement to avoid the heat and the arrangement for regulating the wick
are applicable to lamps or lanterns of other kinds.
PAYNE & TALBOT,
Agents for the Applicants,

page_text: Street Birmingham aforesaid Silver Smith do hereby declare the nature of our said
invention for IMPROVEMENTS IN THE CONSTRUCTION OF DARK ROOM LAMPS OR
LANTERNS FOR PHOTOGRAPHERS USE and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement, referrence being had to the drawings hereunto annexed and to the letters
and figures marked thereon:-
These improvements refer to three points of much importance to operators in
Photography.
Firstly a shadowless framed lamp. Secondly the avoidance of great heat and
Thirdly the winding of the wick from the outside without turning the lamp, or
opening it.
The first point I effect by using one sheet of bent glass of a ruby tint or other
tint which does not contain the blue or actinic ray.
This bent glass extends round the front and sides of the lamp from the metal
frame on one side to that upon the opposite side with no intermediate metal.
The construction of lamp frame which we prefer to use in combination with this
bent glass is one with a flat back formed as a door sliding from the top and held
at the bottom by a spring catch and upon this sliding door are two grip handles
which serve both to hold the lamp by and to open the door.
The top of the lamp frame may also be constructed as a hinged lid or cap so as
to facilitate the sliding in of a new glass in case of breakage of the old one.
But we do not confine ourselves to this particular construction of back or frame.
The second point namely the avoidance of heat is gained by packing the floor
and the surrounding sides of the lamp the burner and the funnel oil feeder with
cork or other suitable weak conductor of heat to prevent the possible combustion
of inflammable oil or spirit.
The third point we effect by making the spindle which is used for regulating the
wick pass through the side or front of the lamp and terminate in a thumb button.
Upon this spindle we apply a slide or telescopic action so that by drawing out the
key or portion carrying the thumb button the burner may be released when
required, then replaced the key portion pushed in and all is intact.
The improvements to avoid the heat and the arrangement for regulating the
wick are applicable to lamps and lanterns of other kinds.
Referring to the drawings Fig. 1. is a front view of a lamp. Fig. 2 a section
through the same from front to back and Fig. 3 a plan (a, a,) is the sheet of bent
glass of a ruby or other tint not containing the blue or actinic ray, so bent as to
extend from the metal frame (b) on the one side to the metal frame (c) on the
other (d) Fig. 2 is the flat back or sliding door sliding in the grooves (e, e,) Fig. 3.
(which shews the lamp frame with the door removed) (f) is the catch (g) the grip
handles;
the lid or cap is hinged at (h). (i) Fig. 2 is the cork or other packing
used to prevent the possible combustion of oil or spirit.

page_text: j Figs. 1 & 3 is the thumb button upon the key (k), Fig. 3. this key (k) grips the
spindle () and thus by turning the thumb button (5) the lamp can be regulated
from the outside and pulling forward the knob (m) the key (/) is released from the
spindle () and the lamp is free to be removed.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is
1. A shadowless framed dark room lamp formed with one sheet of bent glass of
a ruby or other tint not containing the blue or actinic ray substantially as herein
set forth and described.
2. The arrangement for packing these and other lamps or lanterns with cork or
other weak conductor for the purposes named.
3. The arrangement for winding the wick of lamps or lanterns from the outside
substantially as herein set forth and specified.
PAYNE & TALBOT,
Agents for the Applicants.