IMPROVEMENTS IN APPARATUS TO BE USED ON RAILWAYS TO INDICATE TO THE ENGINE DRIVER OF A CARRIAGE TRAIN THE LENGTH OF TIME WHICH HAS INTERVENED SINCE THE PASSING OF A PREVIOUS TRAIN
Year: 1863

page_text: LETTERS PATENT to Sir Coutts Lindsay, of 11, Grosvenor Square, in the
County of Middlesex, for the Invention of "IMPROVEMENTS IN APPARATUS
TO BE USED ON RAILWAYS TO INDICATE TO THE ENGINE DRIVER OF A CARRIAGE
TRAIN THE LENGTH OF TIME WHICH HAS INTERVENED SINCE THE PASSING OF A
PREVIOUS TRAIN."
Sealed the 14th July 1868, and dated the 21st January 1868.
PROVISIONAL SPECIFICATION left by the said Sir Coutts Lindsay at
the Office of the Commissioners of Patents, with his Petition, on the
21st January 1863.
I, Sir COUTTS LINDSAY, of 11, Grosvenor Square, in the County of Mid-
dlesex, do hereby declaro the nature of the Invention for "IMPROVEMENTS
IN APPARATUS TO BE USED ON RAILWAYS TO INDICATE TO THE ENGINE DRIVER OF A
CARRIAGE TRAIN THE LENGTH OF TIME WHICH HAS INTERVENED SINCE THE PASSING
OF A PREVIOUS TRAIN," to be as follows:-
This Invention has for its object improvements in apparatus to be used on
railways to indicate to the engine driver of a carriage train the length of time
which has intervened since the passing of a previous train. For these purposes
at intervals along a line of railway apparatus is erected consisting of a
pendulum placed in a suitable case, part of which is made transparent so as to
expose such part of the pendulum as may be desired to the view of the
engine driver of a coming train, and so that it may be clearly seen by day and
by night, the apparatus being properly lighted at night. A fixed graduated
dial is applied to the case within which the pendulum works, which is also to
be exposed to view so as to be seen by the engine driver of a coming train.
The graduated scale and the pendulum are to be of such dimensions and so
arranged that they may be clearly seen at a considerable distance. The

page_text: pendulum is to be acted on by each passing train, so as to place it to a
determined distance.beyond its perpendicular position and then release it, so
that it may be allowed to vibrate freely. The length of time which has
intervened since a previous train has passed will be indicated if the pendulum
has not come to rest by the reduced arc in which the pendulum is vibrating
as compared with its greatest vibration. The dial is to be graduated to
indicate minutes or other determined measure of time; the passing trains may
be caused to act on the pendulum in any suitable manner in order that it may
commence to vibrate immediately a train has passed, such as by the wheels or
other part of a carriage pressing down or otherwise acting on an instrument in
connection or in communication with the instrument employed to put the
pendulum in motion.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Sir Coutts Lindsay in the Great Seal Patent Office on the
17th July 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, Sir COUTTS
LINDSAY, of 11, Grosvenor Square, in the County of Middlesex, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-first day of January, in the year of our
Lord One thousand eight hundred and sixty-three, in the twenty-sixth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said Coutts Lindsay, Her special licence that I, the said Coutts
Lindsay, my executors, administrators, and assigns, or such others as I, the
said Coutts Lindsay, 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, 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
APPARATUS TO BE USED ON RAILWAYS TO INDICATE TO THE ENGINE DRIVER OF A
COMING TRAIN THE LENGTH OF TIME WHICH HAS INTERVENED SINCE THE PASSING OF
A PREVIOUS TRAIN," upon the condition (amongst others). that I, the said
Coutts Lindsay, 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

page_text: 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 Coutts Lindsay, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say :-
This Invention has for its object improvements in apparatus to be used on
railways to indicate to the engine driver of a coming train the length of time
which has intervened since the passing of a previons train. For these purposes
at intervals along a line of railway apparatus is erected consisting of a
pendulum placed in a suitable case, part of which is made transparent so as to
expose such part of the pendulum as may be desired to the view of the
engine driver of a coming train, and so that it may be clearly seen by day and
by night, the apparatus being properly lighted at night. A fixed graduated
dial is applied to the case within which the pendulum works, which is also to
be exposed to view so as to be seen by the engine driver of a coming train.
The graduated scale and the pendulum are to be of such dimensions and so
arranged that they may be clearly seen at a considerable distance. The
pendulum is to be acted on by each passing train so as to place it to a
determined distance beyond its perpendicular position, and then release it so
that it may be allowed to vibrate freely. The length of time which has
intervened since a previous train has passed will be indicated (if the pendulum
has not come to rest) by the reduced arc in which the pendulum is vibrating
as compared with its greatest vibration. The dial is to be graduated to
indicate minutes or other determined measure of time. The passing trains
may be caused to act on the pendulum in any suitable manner in order that it
may commence to vibrate immediately a train has passed, such as by the
wheels or other part of a carriage pressing down or otherwise acting on an
instrument in connection or in communication with the instrument employed
to put the pendulum into motion.
In witness whereof, I, the said Coutts Lindsay, have hereunto set my
hand and seal, this Third day of July, in the year of our Lord One
thousand eight hundred and sixty-three.
COUTTS LINDSAY. (L.S)