IMPROVEMENTS IN THE MANUFACTURE OF GLASSES FOR RAILWAY CARRIAGE ROOF LAMPS
Year: 1875

page_text: LETTERS PATENT to Henry Defries, of the Firm of Jonas Defries and
Sons, of No. 147, Houndsditch, in the County of Middlesex, for the
Invention of "IMPROVEMENTS IN THE MANUFACTURE OF GLASSES FOR
RAILWAY CARRIAGE ROOF LAMPS."
Sealed the 26th October 1875, and dated the 28th April 1875.
PROVISIONAL SPECIFICATION left by the said Henry Defries at
the Office of the Commissioners of Patents, with his Petition, on
the 28th April 1875.
•
I, HENRY DEFRIES, of the Firm of Jonas Defries and Sons, of
No. 147, Houndsditch, in the County of Middlesex, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN THE MANufacture of
GLASSES FOR RAILWAY CARRIAGE ROOF LAMPS," to be as follows:-
My Invention consists in manufacturing the glasses of railway carriage
roof lamps with a foot or ring upon the bottom of the lamp glass on its
exterior, obtaining such foot or ring by means of a recess formed in the
pressing mould, so that the entire lamp glass, body and foot, shall be
pressed in one piece and by one operation, and with perfect accuracy.

page_text: The great advantage of this foot or ring is that it preserves the bottom
of the lamp glass from friction and scratches when placed upon the
platform or permanent way, and the mode of manufacture above
explained gives this advantage without any appreciable extra cost, and
without any danger of cracking from different expansion between lamp
glass and foot or ring.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Henry Defrics in the Great Scal Patent Office
on the 27th October 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
DEFRIES, of the Firm of Jonas Defries and Sons, of No. 147, Hounds-
ditch, in the County of Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-eighth day of April, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Henry Defries, Her special
licence, that I, the said Henry Defrics, my exccutors, admini-
strators, and assigns, or such others as I, the said Henry Defries,
my executors, administrators, and assigns, should at any time agrec
with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN THE MANUFACTURE OF GLASSES FOR RAILWAY CARRIAGE ROOF
LAMPS," upon the condition (amongst others) that I, the said Henry
Defries, my executors or administrators, by an instrument in writing
under my, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be filed
in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Henry Defries, do hereby declare
the nature of my said Invention, and in what manner the same is

page_text: to be performed, to be particularly described and ascertained in and
by the following statement :-
My Invention consists in manufacturing the glasses of railway carriage
roof lamps with a foot or ring upon the bottom of the lamp glass on its
exterior, obtaining such foot or ring by means of a recess formed in the
pressing mould, so that the entire lamp glass, body and foot, shall be
pressed in onc picce and by one operation, and with perfect accuracy.
The great advantage of this foot or ring is that it preserves the bottom
of the lamp glass from friction and scratches when placed upon the
platform or permanent way, and the mode of manufacture abovo
explained gives this advantage without any appreciable extra cost, and
without any danger of cracking from different expansion between the
body of the lamp glass and its foot or ring.
In witness whereof, I, the said Henry Defries, have hereunto
set my hand and scal, this Twenty-sixth day of October, in the
year of our Lord One thousand cight hundred and seventy-
five.