Improvements in Fittings for Incandescent Gas Lamps.
Year: 1896

page_text: Date of Application, 18th Sept., 1896.
Complete Specification Left, 18th June, 1897-Accepted. 21st Aug. 1897
PROVISIONAL SPECIFICATION.
Improvements in Fittings for Incandescent Gas Lamps.
I, FREDERICK SOUTHWELL CRIPPS, of 27 Great George Street, Westminster,
London Civil Engineer, do hereby declare the nature of this invention to be as
follows:-
It is found in cleaning Street Lamps or Lanterns containing Incandescent Burners
that the frail portion known as the Mantle, unless removed, is liable to be broken or
destroyed by blows accidentally given by the Cleaner-the hand or duster striking
the talc or glass chimney is a fruitful cause of damage in this way. Hence it is the
general practice when cleaning the lanterns to remove the Burners and Mantles
entirely. This is also dangerous to the life of the Mantle as it will not suffer
shaking or handling in this way, and, moreover, it is unable to resist the action of
wind or rain when thus exposed. My invention consists of a hollow vessel which
can be readily and temporarily fixed during the process of cleaning the lantern, and
which so encloses the burner as to completely protect the said burner, mantle and
chimney from damage. The shield or protector is designed to be rigidly fixed at
the base, either to a frame fitted into the bottom of an ordinary lantern, or in the
case of new lanterns the bottom would be made with the necessary arrangements
for fixing of protector.
The protecting vessel may be cylindrical, telescopic or of any other convenient
form to enclose the internal lantern fittings, and it may be fixed in any convenient
manner at the base, for instance, it may be slipped over a projecting collar, or slid
in grooves or lugs formed in the base-frame of the lantern, or slipped down over
vertical rods. In the case of Globe Lanterns the protecting vessel may be slipped
either down or up according to whether the lamp is supported from below or
swinging from above and it may be guided by vertical rods or otherwise, so as to
keep it free from striking the burner.
Dated this 17th day of September 1896
Improvements in Fittings for Incandescent Gas Lamps.
I, FREDERICK SOUTHWELL CRIPPS, of 27 Great George Street, Westminster,
London, Civil 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 :-
aleaning Stuent
I, FREDERICK SOUTHWELL CRIPPS, of 27 Great George Street, Westminster,
London, Civil 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:-
It is found in cleaning Street Lampe or Lanterns

page_text: Burners that the frail portion known as the Mantle, unless removed, is liable to be
broken or destroyed by blows accidentally given by the Cleaner-the hand or
duster striking the talc or glass chimney is a fruitful cause of damage in this way
Henco it is the general practice when cleaning the lanterns to remove the Burners
and Mantles entirely. This is also dangerous to the life of the Mantle as it will not
suffer shaking or handling in this way, and, moreover, it is unable to resist the
action of wind or rain when thus exposed. My invention consists of a hollow vessel
which can be readily and temporarily fixed during the process of cleaning the
lantern, and which so encloses the burner as to completely protect the said burner,
mantle and chimney from damage or shock during the cleaning of the Lantern.
But in order to render the nature of my invention clear I append a sheet of
illustrative drawings, of which
Figures 1 & 2 are a sectional elevation and plan which show the protecting
vessel A as applied to an ordinary Street Lantern by slipping it over a collar D on
the base B.
Figures 3 & 4 are a sectional elevation and plan which show the protecting
vessel A as applied to an ordinary Street Lantern by means of a bayonet joint at the
base.
Figure 5 shows the vessel A made telescopic to admit of introducing it into
shallow Lanterns.
Figures 6 & 7 are an elevation and sectional plan of the protecting vessel A made
in two segments to admit of sliding it on horizontally in grooves or snugs cast on
the base.
Figure 8 is a sectional plan of the same vessel but showing the outer segment
turned round so as to close the opening in the back of the inner one after sliding
the vessel into position.
Figures 9, 10 & 11 are sectional elevations which show, the protecting vessel A as
applied to a Globe Lantern so as to allow of removing the Globe for cleaning, the
protecting vessel being slipped over the vertical guide rods N.
The protecting vessel A may be of any form most suited for any particular type
of Lantern to which it may be applied, that is, it may be cylindrical, telescopic or
of any other convenient form to enclose the internal lantern fittings, and it may bo
fixed in any convenient manner at the base. In the case of the ordinary square
type of Lantern shown in Figs. 1 & 3 the shield or protector A is designed to be
rigidly fixed at the base either to a frame B, Figs 1 & 2, fitted into the bottom of an
ordinary lantern, or in the case of new lanterns the bottom would be made as a part
of the lantern frame itself with the necessary arrangements for fixing the protector
such as C in Figs. 3 & 4.
In Figs. 1 & 2 the protector A is shown as a plain cylinder which slips over a
projecting collar D on the base B. When it is required to clean the lantern the
protector A is lowered over the burner and chimney E from above. It is somewhat
larger in diameter than the parts enclosed so as to be perfectly free from all contact
with the burner, mantle or chimney and it firmly fits the base B so as to resist any
accidental knocks without transmitting the same to the delicate parts enclosed
within it. It also excludes all draughts, dust and the like during the time the
lantern is open for cleaning.
The protector A may be fixed to the base C by a bayonet joint as in Figs. 3 & 4
instead of slipping over a collar; that is, clips F. on the side of the protector, are
by turning it on its axis, made to catch into corresponding lugs or clips G on the
base C. as shown in Figs. 3 & 4.
Where the height of the lantern is too short to admit of introducing the protector
over the burner in one length it may be made telescopic as in Fig. 5; or preferably
the protector may be made in two segments H & I and slid on sideways in grooves
or lugs J. formed in the base frame K of the lantern as shown in Figs. 6, 7 & 8 in
which case a gap L is left in the front half H of the cylinder so as to be free of the
burner and chimney when sliding it forward, and then when in position the covering

page_text: half of the cylinder I. is turned round on its axis so as to close the front of the
protector and completely enclose the parts within.
Fig. 7 is a sectional plan of the protector when open for sliding on or off.
Fig. 8 is a section showing the outer segment I turned round so as to close the
opening in the inner one H.
In the case of globe lanterns the protecting vessel may be slipped either down or
up according to whether the lamp is supported from below or swinging from above
and it may be guided by vertical rods or otherwise so as to keep it free from
striking the burner. For lamps of this class the protector A is a plain cylinder with
a ring at the top for suspending it from the ordinary ladder arin M on the lamp
post.
Fig. 9 shows the lamp before putting on the protector and in which there are at
least three vertical guiding rods N to prevent the protector A striking the
burner or mantle E when sliding it on.
Fig. 10 shows the reflecting cowl O removed and the portable protector placed in
position before removing the globe.
Fig. 11 shows the protector covering the burner and the globe taken down for
cleaning so that no damage can occur to the burner or mantle from wind, rain or
knocks during the cleaning of the globe.
The top of the protector is in all cases perforated with a few small holes so as not
to extinguish what is known as the pilot light in connection with the bye pass of the
incandescent burner.
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. A hollow vessel or protector to surround and shield the Burner, Mantle,
Chimney and other frail parts of the ordinary incandescent gas light from blows,
shocks, wind and weather during the process of cleaning street or outside gas
lanterns, substantially as and for the purpose herein set forth.
2. The fixing of the said protector in such a manner as not to be in direct
contact with any of the frail parts it is designed to protect and by means of a rigid
attachment to the frame of the lantern at the base or by sliding over protecting and
guiding rods, substantially as and for the purpose herein set forth.
Dated this Seventeenth day of June 1897.
FREDERICK SOUTHWELL CRIPPS.