Improvements in and connected with Lamps, Lanterns, and other Lights.
Year: 1893

page_text: Date of Application, 11th Feb., 1893-Accepted, 22nd Apr., 1893
Improvements in and connected with Lamps, Lanterns, and other
Lights.
1, PIERRE GRANDJEAN, of 94, Rue de Allemagne, Paris, in the Republic of
France, Mechanic, 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 improvements in and connected with lamps, lanterns,
and other lights and has for its object to provide means whereby lights are rendered
more powerful or radiating independant of the luminant used (gas, oil, electricity,
sun-light or the like).
At present to project the light with a considerable degree of intensity lenses held
in metal or other frames have given a more or less satisfactory result, but on the
whole not very appreciable judging from such as are seen on carriages, omnibuses,
tram-cars, locomotives and the like. Such are generally half lenses, i.e. lenses
convex externally.
My invention is characterized by dispensing with the frame fixed immediately
around the lens and substituting the same by a transparent portion of the same
material as the lens in one piece with the same, produced either by cutting or
moulding. The said lens is formed in one piece with the glass and I may make the
same of any convenient or preferable form (convex, concave, bi-convex, bi-concave,
concavo-convex, plano-convex, plano-concave, and the like) and in configuration
circular, elliptical, oval and the like. The glass round the lens may also be of any
convenient form, the shapes referred to hereinafter being only the principal types
which may serve as a basis for any of the series more or less numerous.
The application of my system of lens glasses is not limited to the kind of light,
such as lighthouses, gas or electric lamps on public roads, carriage lamps of any
kind, tram-cars, locomotives, fixed or movable discs, velocipedes lanterns, lights
for boats, dwellings, outhouses in particular, public or commercial establishments of
any kind, railway stations, works, magazines and the like.
The aforesaid lenticular glasses may be made of any kind of material (crystal,
glass, floss-silk, and the like) in any colour according to the intended use.
And in order that my invention may be more fully understood I have caused to
be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. 1 is an elevation, vertical and horizontal section of a glass of a lantern A
with bi-convex lens B, B¹.
Fig. 2 are similar views of a glass A with bi-convex lens B, B1 elliptical in
configuration.
Fig. 3 is a front view and side view of a glass A of circular configuration with
bi-convex lens B, B', and bevel edge a.
Fig. 4 are similar views of a glass A rectangular in configuration.
Fig. 5 is a front and side view of a rectangular glass A with a plano-convex
ens B.
Fig. 6 is an elevation of a complete lamp furnished in front with a bevelled
glass A having a bi-convex lens B, B'.
Fig. 7 is an elevation, top and bottom view of a coned globe C, serving as
generator and in section lenticular. This globe C is applicable for certain types
of gas lights.
Fig. 8 is a plan and an elevation of a globe D for round lanterns or electric
lights presenting around and along the whole height of the flame. This globe D

page_text: may be perforated or have a hole d at the bottom according to the use for which
it is intended.
Fig. 9 is an elevation of a lamp chimney or glass F with either a convex lens f
or a bi-convex one f, H.
Fig. 10 is a vertical section of Fig. 9.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim, is-
"In and connected with lamps, lanterns and other lights,"
1st. The application of glasses of suitable configuration formed with lenses in 1
one piece and thereby dispensing with the frame heretofore employed to hold the
lens, substantially as and for the purpose set forth.
2nd. Forming the lenses specified in the preceding claim of any suitable shape
and with concentric channels, facets and the like.
3rd. The formation of the glass and lens as specified of any suitable size, with 1
rough or partly rough surface and in any colour.
Dated this 10th day of February 1893.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.