Improvements in Street Lamps, and the Method of Supporting and Lighting same.
Year: 1896

page_text: Date of Application, 22nd May, 1896
Complete Specification Left, 22nd Feb., 1897-Accepted, 22nd May, 1897
PROVISIONAL SPECIFICATION.
Improvements in Street Lamps, and the Method of Supporting and
Lighting same.
I, THOMAS REDMAN of The Priory, Bolton Bradford, in the County of York,
Gas Engineer, do hereby declare the nature of this invention to be as follows:-
My invention has for its object certain improvements in street lamps by arranging
and combining therewith appliances so that shocks and vibrations given to the lamp
column are exhausted and cut off before the shock or vibration can reach the lamp
burner and mantle above same: also to arrange the lamps so as to obtain a speedy
and effectual way of lighting the gas escaping from the burner and to arrange the
reflector and connections with the lamp globe in a manner to afford facilities for
cleaning and other purposes.
In carrying out my object, I attach to the reflector or other suitable portion of
the lamp frame, one or more rods for suspending the lamp by a hook or ball joint
supported by a spiral spring or other elastic cushion, in a manner that any shocks
or vibration given to the lamp column, are absorbed by the spring or other elastic
cushion, before they are transmitted to the lamp which coutains the gas burner and
mantle over same.
Between the burner and the reflector 1 place a chimney and above the reflector
and mantle I use a metallic chimney, at the top of which I secure a suitably
arranged hood, with another of smaller size above it, which is in connection with
flash lighting tube, the bottom end of the tube is prepared with a spoon or coue,
having the base downwards, so that on applying a light to the hood, the gas
escaping up the flash lighting tube is ignited, and the gas at the burner lighted
without having occasion to open the lamp.
Around the before mentioned chimney is an annular tube for supplying atmo-
spheric air to the interior of the lamp and is connected to a reflector which is
divided in a manner that, the other portion of the reflector is moveable to enable
the attendant to readily examine same for cleaning or other requirements of the
lamp.
The gas supply may be made through the hanging support and conducted through
the reflector and conveyed to the centre boss or directly into the bottom end of the
stem on centre boss by means of a flexible tube, the valve or tap being placed in a
suitable position.
Dated this 20th day of May 1896.
THOMAS REDMAN.
Improvements in Street Lamps, and the Method of Supporting and
Lighting same.
I THOMAS REDMAN of The Priory, Bolton, Bradford in the County of York
Gas 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 :-
My invention has for its object certain improvements in street lamps, by arranging

page_text: and combining the parts in a manner that, a speedy and effectual way of lighting
the gas escaping from the burner is obtained; also to arrange the reflector and
connections with the lamp globe so as to afford facilities for cleaning and other
purposes.
In describing my invention in detail, reference is made to the accompanying
drawing forming part of this specification, and representing an elevation of my
improved lamp, one half of which is shown in section.
In carrying out my object, I attach to the coned reflector A, or any other suitable
portion of the lamp frame, bars or tubes B, coupled to the boss B supporting the
burner fittings C, which is arranged to receive a spiral spring D, between a shoulder
on the said fittings and a movable flash plate E, upon which rests the upper or
sliding portion of the burner C and chimney F.
The transparent chimney F rests upon the upper portion of the burner in the
usual manner, and is compressed by the spiral spring D between the said Hange or
flash plate and a recess H in the plate J forming a loose portion of the reflector,
such loose portion being held in position by what is known as a bayonet joint or in
any other convenient and suitable manner, the plate J is by preference recessed for
the reception of the coned and outer reflector A.
Above the reflector plate J in continuation of chimney F, is a metalic chimney G,
at the top of which is placed a conical shaped hood K, the base of which is of the
same diameter as the external casing L, the bottom of which is secured to an
enlargement M, divided near the centre by a loose perforated diaphragm N, a
similar perforated diaphragm is secured at O, and the circumference of the enlarge-
ment is perforated between the said diaphragms, the enlargement M rests upon
the loose reflector plate J.
To the top of the external casing L, is secured a perforated hood P surmounted
by a similar hood P¹ but of smaller size, and at the base of the hood P is an
annular perforated disc Q, in the centre of these two hoods extending from the
hood P¹ to a short distance within or without the metalic chimney G is a gas light
flashing tuhe R which may be parallel as shown, or the bottom end within or near
to the metalic chimney G somewhat expanded, this tube is held in position by the
inverted cone plate S and the top inclined plate P2 of hood P. An inverted
cone S'is also inserted in the upper hood Pl. These inverted cone plates S and S
reduce the cavities in which the gas collects before ignition, thereby reducing the
explosive effect; which may also be accomplished by means of flat or curved plates
in place of the cone plates S and S', but I find that by applying the plates in the
manner shown, not only is the gas light flashing tube R secured, and the explosive
effect minimised, but that the escaping gas is more readily ignited.
The glass shade T is inserted in a recess formed in the coned reflector A, and is
preferably prepared with a small hole at bottom, through which the screwed portion
of the boss B' passes. Between the bottom of the said glass shade and nut V is a
spiral spring and washer W, or other flexible material may be inserted, and the
glass shade resting upon the washer and spring W or other material held in position
on tightening the nut V, or in any other convenient manner.
The lamp as shown is fitted with an incandescent gas burner and mantle, but it
will be obvious that other gas burners may be utilized, and in any case the gas
may be conveyed to the burner C in any suitable manner, on opening the gas
supply tap, the gas at the burner C may be lighted on applying a light to hood P,
from which the light flashes down the tube R and chimneys G and F to the
burner C without 'materially disturbing the incandescent mantle X.
Air is admitted to the interior of the lamp 'through the perforations in the
circumference of the enlargement M where it is heated to some extent which
secures more perfect combustion and an increase of light, as well as the preservation
of the mantle X from carbon deposit, consequently greatly increasing the life of
same, some of the beated air passing down through the perforated diaphragm N
aud openings through the loose reflector J in the direction of the arrows to the
exterior and finally to the interior of the chimney F for assisting combustion, the

page_text: remainder of the air passing upwards by the annular space Y to the conical hood K.
and through the perforations in the hood P.
By placing the disc Q and the diaphragm O and N in the positions shown, and
fixing the cone shaped hood K as described, the air entering the perforation in
hoods P and P in rough and boisterous weather is baffled to such an extent that.
the light is not affected.
The lamp may be suspended or supported in any convenient manner, and the
portion of the lamp resting on the coned reflector A, that is to say, from the loose
reflector J and the enlargement M to the hood P¹ may be removed without.
disturbing the other portions of the lamp, thus giving access to the interior of the
lamp for cleaning, examination or other requirements.
It will be obvious that other forms of lamps may be utilized in combination with
the loose reflector J, and parts supported thereby, between enlargement M and
hood P, and accomplish one portion of my object, that of lighting gas escaping
from the burner by the flashing tube R in rough and boisterous weather without.
having to open into the interior of the lamp.
Having now particularly described and ascertained the nature of this my inven
tion, and in what manner the same is to be performed, I declare that what.
I claim is,
1. A loose reflector plate J combined with an enlargement M, chimneys G and F
annular space Y hoods P and P' and diaphragms N and O and disc Q arranged.
substantially in the manner as herein before set forth and illustrated.
2. A flashing tube R in combination with inverted cone plates S and S', hoods P
and P¹ and chimneys G and F, arranged substantially in the manner and for the
purpose as herein before set forth.
3. A cone shaped hood K in combination with hood P, cone plate S and
chimneys G and F substantially in the manner as herein before described and
illustrated.
4. An enlargement M divided by diaphragms N and O, and perforated at the
circumference in combination with perforated disc Q arranged substantially as
shown and described.
5. The chimney F in combination with reflector plate J, flash plate E or its.
equivalent and compressed spiral spring D arranged substantially in the manner
shown and described.
6. The compressed spiral spring D in combination with the chimney F, plate J.
and chimney G detachable in the manner substantially as herein before set forth.
Dated this 20th day of February 1897.
THOMAS REDMAN.