An Improved Gas Jet for Magic Lantern and similar Exhibitive Purposes.
Year: 1897

page_text: Date of Application, 16th Aug., 1897
Complete Specification Left, 16th May, 1898-Accepted, 18th June, 1898
An Improved Gas Jet for Magic Lantern and similar Exhibitive
Purposes.
I, RICHARD JOHN Moss, of Conduit Road, Abingdon, in the County of Berkshire,
Ironmonger's Assistant, do hereby declare the nature of this invention to be as
follows:
This invention relates to gas jets used in magic lanterns and similar displaying
apparatuses, and has particular reference to those jets in which more than one
burner is used.
Hitherto such gas jets have been constructed with one supply tube common to
all the burners and, assuming that two burners are being used, it is found that
when one burner is turned low the extra pressure of gas on the other burner
tends to make its flame roar and the turned-down burner to smoke-thus pro-
ducing an uneven light.
Now my invention has for its object a jet, in which the gas or gases can be
easily and uniformly controlled, the jet itself capable of a vertical and circular
adjustment, and the reflector attached to the jet shall be capable of backward,
forward, and vertical movements.
In constructing a two-light jet according to my invention I provide each burner
with a separate supply tube and regulating cock, so that the flame of each burner
can be directly controlled and the pressure of gas equalised to a nicety. The main
supply tube, which is horizontally disposed, has the ordinary inlet nozzle fitted to
its one end, and has its other end enlarged into a hollow circular boss. This hollow
circular boss is fitted with a small set screw on its one side, and takes onto a
circular vertical standard or rod rivetted, screwed, or otherwise secured to a square
or rectangular base plate. By this arrangement the jet is capable of being
adjusted vertically or in a central direction in respect of the said vertical rod;
the set screw only having to be loosened and again tightened when an adjustment
is made.
Leading out of the main supply tube are two separate supply tubes of suitable
diameter and length, each tube being provided with a regulating cock at a suitable
Loose metal sleeves con-
point in its length for regulating the supply of gas.
nected together at their middles by a vertical strip of metal take on to these two
supply tubes & have a horizontal travel thereon, and on the upper part of this
vertical strip of metal I attach a reflector by means of an eye soldered on to its
convexed back. To give the reflector a vertical adjustment the said eye may be
provided, if found necessary, with a small spring on its inside face, or the back of
the reflector itself may be provided with an outwardly-curving spring, situated
in such a manner that a tight vertical adjustment can be made at any point along
the said vertical strip of metal. As a further means of adjustment the back of the
reflector may be provided with a spring clip instead of the eye, or the eye
may be used with a small set
By thus giving the reflector a
screw.

page_text: vertical and horizontal adjustment I am always able to keep the same exactly in
focus, and so obtain the best possible results from my lights.
It is obvious that my invention may be applied to lantern jets in which more
than two burners are used with equally good results, and its application would
differ in no essential respect to that already described in connection with two
burners.
DJ
141
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1007
An Improved Gas Jet for Magic Lantern and similar Exhibitive
Purposes.
I, RICHARD JOHN Moss, late of 10, Conduit Road, Abingdon, in the County of
Berkshire, but now of 97, Great Hampton Street, Birmingham, in the County. of
Warwick, Manager, 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 gas jets used in magic lantern and similar, displaying
apparatuses, and has particular reference to those jets in which more than one
burner is used.
Hitherto gas jets have been constructed with one supply tube common to
all the burners and, assuming that two burners are being used, it is found that
when one burner is turned low the extra pressure of gas on the other burner
tends to make its flame roar and the turned-down burner to smoke-thus pro-
ducing an uneven light.
Now my invention has for its object a jet in which the gas or gases can be
easily and uniformly controlled, the jet itself capable of a vertical and circular
adjustment, and the reflector attached to the jet shall be capable of backward,
forward, and vertical movements.
In constructing a two-light jet according to my invention I provide each burner
with a separate supply pipe and regulating cock, so that the flame of each can be
directly controlled and the pressure of gas equalised to a nicety. The main supply
pipe, which is horizontally disposed, has the ordinary inlet nozzle fitted to its one
end, and has its other end enlarged into a hollow circular boss. This hollow boss
is fitted with a small set screw on its one side, and takes onto a circular vertical
standard or rod rivetted, screwed, or otherwise secured to a square or rectangular
base plate. By this arrangement the jet is capable of being adjusted vertically
or in a central direction in respect of the said vertical rod; the set screw, only
having to be loosened and again tightened when an adjustment is made.
Leading out of the main supply pipe are two separate supply tubes of suitable
diameter and length, each pipe being provided with a regulating cock for regu-
lating the supply of gas. Loose sleeves connected together at their middles by
a. vertical strip of metal take onto these two delivery pipes and have a horizontal
travel thereon, and on the upper part of this vertical strip of metal I attach a
reflector by means of an eye soldered onto its convexed back; the said reflector
having a vertical travel upon the strip of metal and being fixed in position, after
an adjustment has been made, by means of a set-screw working within the eye of
the reflector. By thus giving the reflector a vertical and horizontal adjustment
I am always able to keep the same exactly in focus and so obtain the best possible
results from the displayed light.

page_text: In the sheet of drawings accompanying this specification I have shown my
invention applied to a two-light lantern jet, but I may make lantern jets of three
or any convenient number of lights, with an independently-controlled passage to
each burner, according to requirements.
Fig. 1 is a view in perspective of the jet, Fig. 2 a side view showing the jet
without its base plate, Fig. 3 an end view of the reflector, and Fig. 4 a side view of
the jet's stand or baseplate.
The jet a has an ordinary inlet nozzle a² communicating with the main supply
pipe a³, which latter has a circular hollow boss a' formed on its inner end and
cast in one with it for the purpose of taking on to the circular upright rod r
centrally rivetted or screwed on to its base plate 2; the said boss being provided
with a small set screw for effecting an adjustment in the length or direction of the
jet, the latter being capable of an all-round movement upon the said upright rod r.
Leading out of the general supply pipe a³ are two separate and independent
supply pipes 61, 63, each provided, near their junction with the general supply
pipe, with regulating cocks c¹, c, and at their outlets with burners of a suitable
type.
Mounted loosely on these two independent supply pipes 61, 62, and so as to be
capable of a horizontal traversing movement in respect of same, are two loose
sleeves d¹, d², connected rigidly together at their middles by a vertical strip of
metal e thickened at e for that purpose. Mounted upon the upper end of this
vertical upright strip e by means of its hollow eye f is a reflector g, the said eye
being preferably provided with a small set screws for effecting the vertical
adjustment of the reflector, or the latter may be rigidly mounted upon its vertical
rod & have its vertical adjustment effected by raising or lowering the jet upon its
supporting pillar r. A horizontal movement of the reflector is effected by pushing
the vertical rod and its attached sleeves in the desired direction along the inde-
pendent supply pipes 61, 62.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
First. In lantern jets controlling the supply of gas by means of independently
controlled separate supply pipes substantially as and for the purpose described
and set forth.
Second. In lantern jets the combination with independently controlled separate
supply pipes 61, 62, of traversing sleeves d', d³, vertical carrier rod e rigidly
connecting same, and reflector g threaded upon the said vertical carrier rod by
means of its eye f substantially as and for the purpose described and set forth.
Third. In lantern jets the combination of the main supply pipe a³, hollow
boss a', and vertical rod or pillar r, connected to base plate 2, carrying same
with independently controlled separate supply pipes 61, 62, traversing sleeves d¹, d³,
vertical carrier rod e, and reflector g, substantially as and for the purpose described
and set forth.
Fourth. The general combination, fitting, and arrangement of parts, substan-
tially as and for the purpose described and set forth.
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