Improvements in Apparatus for Kindling and Extinguishing a Light by the Movements of a Door.
Year: 1898

page_text: Date of Application, 20th July, 1898-Accepted, 29th Oct., 1898
Improvements in Apparatus for Kindling and Extinguishing
a Light by the Movements of a Door.
I, PAUL LASNIER HUBERT, of 26, Rue Victor Massé, Paris, France, Engineer,
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 apparatus such that the act of opening a door giving
access to a dark apartment kindles a light in the apartment, and the act of
closing the door extinguishes the light, or in cases where the light is required
for some time while the door is closed, the extinction is effected by the subsequent
opening of the door for exit.
Figure 1 of the accompanying drawings is a longitudinal section and Figure 2
is a sectional plan of apparatus according to this invention, in the condition
when a valve in the gas service pipe is closed, the light being extinguished
except a small kindling jet.
Figure 3 is a longitudinal section shewing the condition when the gas valve
is open.
On the door is fixed a bracket A having rack teeth a gearing with a pinion B
mounted on an axis b on a bracket C fixed on the door frame. Part of C is
formed as a tube D containing a valve E and its rod e surrounded by a spring c
which presses the valve against its seat d. F and G are branches the one leading
from the gas service pipe, the other leading to the burner.
The valve rod e is connected by a link f slotted at m to a crank pin on the
mutilated pinion B. On one tooth of B is a stud 9 which is engaged by a spring
pawl holding the pinion in the position shewn in Figure 1.
Stops a limit the motion of the pinion both ways.
On opening the door the rack teeth a turn the pinion B so that the valve E
is opened and then a catch i enters a notch k in the valve rod, also the crank
pin 7 being on a dead centre relatively to the link f, the valve is held open until
in closing the door the pinion is turned backwards allowing the valve to close,
and so extinguishing the light except a small kindling jet which is supplied
by a small groove in the face of the valve or its seating.
The apparatus is modified as shewn in Figures 4, 5 and 6 so that the light is
not extinguished by the closing of the door after entry but by the subsequent
opening of the door for exit. The rack a gears with the mutilated pinion H
on which a spring pawl is pivotted at o. The link f connects the valve stem e
to a crank pin on a ratchet wheel mounted on the axis of this pinion H. Two
pins s projecting from the extreme teeth of H coming to bear against the levers t
which are connected by a spring and abut on stops u, hold the pinion in its two
extreme positions. A stud von a lever arm acts as a pawl on the teeth of the
ratchet preventing its back movement. On opening the door the pinion H
is turned in the direction of the arrow Figure 4, its pawl n turning the ratchet
wheel r so as to open the gas valve. In the movement of the pawl n its front

page_text: end z is raised in sliding over taking n out of gear with the ratchet wheel r
which remains held by as shewn in Figure 6. On now closing the door the
pinion H is turned back but the ratchet wheel r remains unmoved keeping the
gas valve open. On again opening the door for exit, the pinion is again turned
partly turning the ratchet wheel r until f passing the dead centre, turns r
farther round allowing the valve to be closed by its spring. Then on closing
the door the parts resume the positions shewn in Figure 4.
Obviously by substituting a switch for the gas valve, the apparatus can be
made to serve for kindling and extinguishing an electric glow lamp.
Having now particularly described and ascertained the nature of this in-
vention and in what manner the same is to be performed, I declare that what I
claim is:
1
Apparatus for kindling and extinguishing a light constructed and operating
substantially as described with reference to the accompanying drawing.
T
1. 1
TI
1000
ABEL & IMRAY,
Agents for the Applicant.