A NEW OR IMPROVED SIGNAL LAMP."
Year: 1872

page_text: LETTERS PATENT to Walter Olive Palmer, of Clapham Road, in the
County of Surrcy, for the Invention of "A NEW OR IMPROVED SIGNAL
LAMP."
PROVISIONAL SPECIFICATION left by the said Walter Olive Palmer
at the Office of the Commissioners of Patents, with his Petition,
on the 11th June 1872.
I, WALTER OLIVE PALMER, of Clapham Road, in the County of
Surrey, do hereby declare the nature of the said Invention for "A NEW
OR IMPROVED SIGNAL LAMP," to be as follows:-
My Invention relates to a very simple mechanical arrangement for.
raising and lowering colored glasses within a railway or other signal.
lamp.
My arrangement consists essentially in pivoting the levers carrying
the glasses on a bearing or cock at the side of the lamp, the end of each
of said levers being held outside the body of the lamp beneath a spring
catch when the colored glass which it carries is. raised from between.

page_text: the light and the plain glass fixed lens, and being released by pressing
back this spring catch when the colored glass is to be used.
On the accompanying Sheet of Drawing Fig, 1 is a side view of a
lamp embodying my Invention, and Fig. 2 a front view of same drawn
half the usual size.
a, a¹, are the colored glasses shown in dotted lines, a indicating
glass lowered between light and lens, and a¹ colored glass not in use;
b, b¹, levers carrying colored glasses; c, bearing or cock upon which the
levers pivot; d, d', catches at ends of levers, that at the end of b¹ being
caught beneath the thumb piece e, to keep the colored glass a¹ raised as
shown, the catch at the end of being shewn released to permit the
glass a to fall by its own weight into the position shown. There are two
thumb pieces c, e¹, one for each lever, but I prefer for the sake of
simplicity and economy to usc but a single spring f to bring them
forward to catch the ends of levers, cutting a slot in said spring plate,
so that the thumb pieces e, e', may be worked separately.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Walter Olive Palmer in the Great Seal Patent
Office on the 10th December 1872..
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WALTER
OLIVE PALMER, of Clapham Road, in the County of Surrey, send
greeting.
•
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eleventh day of June, in the year of
our Lord One thousand eight hundred and seventy-two, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Walter Olive Palmer, Her special licence,
that I, the said Walter Olive Palmer, my executors, administrators, and
assigns, or such others as I, the said Walter Olivo Palmer, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time, and at all times thereafter during the term
therein expressed, should and lawfully might make, usc, exercise, and
vend, within the United Kingdom of Great Britain and Ircland, tho
Channel Islands, and Isle of Man, an Invention for "A NEW OR IMPROVED
SIGNAL LAMP," upon the condition (amongst others) that I, the said

page_text: Walter Olive Palmer, 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 Walter Olive Palmer, do hereby
declare the nature of my said 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 relates to a very simple mechanical arrangement for
raising and lowering colored glasses within a railway or other signal
lamp.
My arrangement consists essentially in pivoting the levers carrying
the glasses on a bearing or cock at the side of the lamp, the end of
cach of said levers being held outside the body of the lamp beneath a
spring catch when the colored glass which it carries is raised from
between the light and the plain glass fixed lens, and being released by
pressing back this spring catch when the colored glass is to be used.
On the accompanying Sheet of Drawing Fig. 1 is a side view of a
lamp embodying my Invention, and Fig. 2 a front view of same drawn
half the usual size.
a, a¹, are the colored glasses shown in dotted lines, a indicating glass
lowered between light and lens, and a³ colored glass not in use; b, b',
levers carrying colored glasses; c, bearing or cock upon which the levers
pivot; d, d¹, catches at ends of levers, that at the end of 6' being caught
beneath the thumb piece e¹ to keep the colored glass a' raised as shown;
the catch at the end of being shown released to permit the glass a
to fall by its own weight into the position shown. There are two thumb
picces e, e¹, one for each lever, but I prefer for the sake of simplicity
and economy to use but a single spring f to bring them forward to
catch the ends of levers, cutting a slot in spring plate so that the thumb
pieces e, e', may be worked separately.
The arrangement shewn gives plain white light by the lens, say red
light by a, and green by a', but it will be evident that more colored
glasses may be fitted in like manner if desired. The lamp is made in
the ordinary manner and of any suitable material.

page_text: Having now described and ascertained the nature of my said Inven-
tion, and in what manner the same is or may be performed, I would
have it understood that what I claim as secured to me by the hercin-
before in part recited Letters Patent is, the use of the combination of
the levers b, b', with bearing or cock c, thumb pieces e, e¹, and springs, {
substantially as and for the purpose herein-before set forth.
In witness whereof, I, the said Walter Olive Palmer, have here-
unto set my hand and scal, this Tenth day of December, in the
year of our Lord One thousand eight hundred and seventy-two.