AN IMPROVED JOINT FOR DETACHABLE GAS LAMPS
Year: 1882

page_text: PROVISIONAL SPECIFICATION left. by the said William Richard Wynne at
the Office of the Commissioners of Patents on the 29th June 1882.
"
WILLIAM RICHARD WYNNE of the Holborn Lamp Works 116 High Holborn
in the County of Middlesex AN IMPROVED JOINT FOR DETACHABLE GAS LAMPS
My invention is of an improved joint for.detachable gas-lamps & is especially
adapted to reflecting lamps such as are used for throwing light from without upon
shop windows & it consists in providing a valve within the connecting arm
which shall automatically shut off the gas from the lamp whenever the latter is
not properly secured in its place
This valve, when the lamp is not so secured is forced upon its seat by a spring
& prevents the passage of gas
When the lamp is fixed for work' it is secured by. a catch or like arrangement
connected with a movable arm which forces the valve from its seat & allows the
passage of gas.
23.3: 7
By this means one or more of a set of several lamps may be removed for repair
or otherwise without interrupting the lighting of the others Moreover the burner
or burners may be arranged so as to form part of the lamp frame & the lanp,
burner, chimney-glass &c may be all removed together from the connecting arin
without opening the front of the lamp & thus the risk of breakage from the
audden admission of cold air into the heated interior of the lamp is avoided

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Richard Wynne in the Great Seal Patent Office on the
29th December 1882.
WILLIAM RICHARD WYNNE of the Holborn Lamp Works Limited 116 High
Holborn in the County of Middlesex, "AN IMPROVED JOINT FOR DETACHABLE
GAS LAMPS"
My invention is of an improved joint for detachable gas lamps and is especially
adapted to reflecting lamps such as are used for throwing light from without upon
shop windows and it consists in providing a valve within the connecting arm
which shall automatically shut off the gas from the lamp when the latter is not
properly secured in its place. This valve when the lamp is not so secured is forced
upon its seat by a spring and prevents the passage of gas. When the lamp is fixed
for work it is secured by a catch or like arrangement connected with a moveable
arm which forces the valve from its seat and allows the passage of gas. By this
means one or more of a set of several lamps may be removed for repair or other- 1
wise without interrupting the lighting of the others. Moreover the burner or
burners may be arranged so as to form part of the lamp frame and the lamp,
burner, chimney glass & may be all removed together from the connecting arm
without opening the front of the lamp and thus the risk of breakage from the
sudden admission of cold air into the heated interior of the lamp is avoided.
In the accompanying drawing I have shown in fig 1. a sectional view of my
invention. A is the socket or frame work upon which a reflecting gas lamp may
be secured and B is the connecting arm by which the lamp is suspended from the
fascia of the shop. C is a chamber within this arm and D the seating of the valve E
upon the spindal F, the bottom part of which is pressed upon by the piece G
which is hinged at H and fastened by the snap I. There is at the top of the
chamber C a wire gauze to prevent dirt entering when the piece G is fastened as
it is shown in the drawing, gas passes into the chamber C and by the pipe K to
the burner in the lamp. When the piece G is unfastened the spring forces the
valve E upon its seat and prevents gas from passing.
The foregoing is a description of the valve as applied at the lower joint and in
the connecting arm but a corresponding arrangement can be applied at the top
joint made between the connecting arm and the gas pipe in the shop fascia In
this case however some modifications are necessary to secure a gas tight joint In
figures Nos 2, to 8 I have shown such a modification fig. 2 representing the
section of a joint such as is shown in the specification No 772 of the year 1880
and figure 3 a front view of the same, figure 4 shows the inside face of a plate
fitting into the back of plate shewn in figure 3. In this figure 4, A is a piece of
cork through which the gas pipe B passes. C is a piece of metal shewn as covering
the mouth of the pipe B the spring E tends to force C into this position but when
the arm D presses upon the piece C the latter is carried against the pressure of
the spring so far as to allow the notch F to be over the pipe B and the gas to
pass, the arm D is secured to the arm G shewn on figure 3 when the con-
necting arm X (shewn on figure 5) is hung on, the lower extremity of its face
pushes against the projection G (on the arm) giving the required motion to the s
arm D.
•
Another form of valve for the top joint is shewn in figures 6, 7, and 8 figure 6
being a sectional side view, figure 7 a cross section of same on the line A, B, and
figure 8 an inside view of the back plate. In figure 6, Z is the gas pipe, in
the shop fascia. Y is a projection which will be pressed inwards when the

page_text: connecting arm is suspended on the books one of which is shown above it Y being
pressed inwards presses against the end ✗ of the piece X. W (shewn in figure 7)
pivoted in a cork seating at V moving the end X against the resistance of the
spring and opening the passage T through which the gas enters and passes thence
by the channel S into the connecting arm figure 7 shews in more detail the
construction of the piece X W and its pivot and figure 8 shews the construction
of the passage from the gas pipe Z to the opening closed by the valve at T which
has a leather facing and seats on cork or equivalent material.
I claim the improved joint for detachable gas lamps substantially as herein
described.
.
In witness whereof I the said William Richard Wynne have hereunto set my
hand and seal the Twenty ninth day of December 1882.