Improvements in Moveable Covers for the Mantles of Incandescent Gas Lamps.
Year: 1899

page_text: Improvements in Moveable Covers for the Mantles of Incandescent
Gas Lamps.
CHARLES HENRY DENT, George Street, Tamworth, Gasfitter, do hereby declare
the nature of this invention to be as follows:-
Consists of any portion of an outside incandescent gas lamp being made to
descend and cover up and protect the mantles whilst globe is removed.
The idea may be varied to meet different shapes and requirements of different
lamps without destroying the idea.
As an instance of its application the flue lining may be employed as the cover;
and as an instance of its working, it could slide up or down the gas rod or rods
resting on the globe, except when globe is below its limit when a stop on the
tube would support it.
The word outside" refers to the types of lamps they are often used inside too.
Dated this 3rd day of March 1899.
COMPLETE SPECIFICATION.
Improvements in Movable Covers for the Mantles of Incandescent
Gas Lamps.
I, CHARLES HENRY DENT, George Street, Tamworth, 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 consists in so constructing an outside incandescent gas lamp
that a portion thereof is made to descend and cover up and protect the mantles
whilst the globe is removed.
The invention may be applied to different types of chimneyless incandescent
gas lamps and the details of construction will vary accordingly.
The accompanying sheet of drawings.illustrates my invention.
In these drawings, Fig. 1 illustrates my invention applied to an incandescent
gas lamp, known in the trade as a gas arc lamp or lantern. The full lines show
the mantle cover or protector and globe in their normal or raised position and the
dotted lines the mantle cover or protector and globe in their lowered position,
the globe being ready to be removed. Fig. 2 is a similar view to Fig. 1, but
shows my invention applied to a lamp provided with a double gas-supply pipe.
In these figures similar letters of reference indicate corresponding parts.
A is the gas-supply pipe or pipes. B is the reflector. C is the flue. D is the
Price 8dI

page_text: baffle plate. E are arms attached to the gas-supply pipe or pipes A and the
flue C F is the globe which is retained in its normal or raised position by
means of the ordinary screw ring and cottar G.
H is the mantle cover or protector which is provided with a socket or sockets h
adapted to slide on the gas-supply pipe or pipes A. I are metal strips or rods,
three or more in number, carried by the mantle cover or protector, which rest
on the upper edge of the globe and serve as a means for supporting and retaining
the mantle cover in its normal or raised position and for returning it to its normal
position when the globe has been cleaned. A stop or stops J are provided to
limit the downward movement of the mantle cover and retain it in its lowered
position protecting the mantles from the injurious effects of strong air currents.
The details incidental to the application of my invention can be considerably
varied without departing from the spirit of my invention. For instance I could
attach the reflector to the mantle cover or protector. A further obvious modifica-
tion would be to suspend the globe from the mantle cover or protector in lieu
of supporting the mantle cover on the globe as shown. In this case the globe
could be cleaned whilst suspended from the mantle cover.
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 incandescent gas-lamp a mantle cover adapted to be simultaneously
lowered with the globe when the latter has to be cleaned, substantially as described
herein.
(2). In an incandescent gas-lamp the combination of a depending gas-supply
pipe or pipes carrying one or more incandescent gas-burners, a mantle cover
forming a liner to the flue sliding on said depending gas-supply pipe or pipes
and adapted to be simultaneously lowered with the globe in order to protect the
mantles whilst the globe is being removed and cleaned and a stop or stops for
limiting the downward movement of said mantle cover, substantially as described
herein and as illustrated by the accompanying drawings.
11.
1
TY
1
1000
C. F. ENNIS,
Registered Patent Agent, 31, Haselrigge Road, Clapham, S.W.