AN IMPROVED DEVICE FOR OPERATING THE THROTTLE VALVE OR REGULATOR IN LOCOMOTIVE ENGINES AND FOR OTHER LIKE PURPOSES
Year: 1870

page_text: LETTERS PATENT to Alfred Vincent Newton, of the Office for Patents,
66, Chancery Lane, in the County of Middlesex, Mechanical
Draughtsman, for the Invention of "AN IMPROVED DEVICE FOR
OPERATING THE THROTTLE VALVE OR REGULATOR IN LOCOMOTIVE ENGINES
AND FOR OTHER LIKE PURPOSES." -A communication from abroad by
Henry Leffert Brevoort, of Brooklyn, in the State of New York,
United States of America.
Bealed the 24th September 1870, and dated the 19th April 1870.
PROVISIONAL SPECIFICATION left by the said Alfred Vincent Newton
at the Office of the Commissioners of Patents, with his Petition, on
the 19th April 1870.
I, ALFRED VINCENT NEWTON, of the Office for Patents, 66, Chancery
Lane, in the County of Middlesex, Mechanical Draughtsman, do hereby
declare the nature of the said Invention for "AN IMPROVED DEVICE FOR
OPERATING THE THROTTLE VALVE OR REGULATOR IN LOCOMOTIVE ENGINES AND FOR
OTHER LIKE PURPOSES," to be as follows:-
This Invention is mainly designed to be used for operating the throttle
valve or regulator in locomotive engines, and such application of the

page_text: Invention has for its object to provide as may be required either for a
quick opening and closing movement of the valve, or for a slower
movement with an accurate adjustment, and to obtain increased facility
for starting the valve in case of its sticking, and for securing the same
in any position.
The Invention consists in a certain combination of a regulating screw
with a hand lever and an adjustable locking device made to gear with
and ungear from the screw, whereby on engaging the screw with the
lever by the intervention of said locking device, said screw may be
worked to actuate the lever and valve or contrivance operated by it, also
by means of the device which is made capable of gearing with and
ungearing from the screw be made to serve as a stop to hold the lever at
a fixed position, and on disengaging the lever with the screw said lever
The
may be swung to perform its work irrespectively of the screw.
hand lever is connected at its lower end by a link to a fixed fulcrum, and
above this connection it is jointed to the rod which operates the throttle
valve. An opening is made through the lever for the regulating screw
to pass through, and by the side of this opening is mounted the
locking device which consists of a threaded jaw held down in contact
with the thread of the screw by a pressure spring and lifted out of action
by a lever which when grasped at the same time as the hand lever before
mentioned will raise the threaded jaw and free the hand lever from
connection with the regulating screw. This screw is connected to a
bracket bearing by a ball-and-socket joint, and it is actuated by a hand
wheel at its outer end.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Alfred Vincent Newton in the Great Seal Patent
Office on the 19th October 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALFRED
VINCENT NEWTON, of the Office for Patents, 66, Chancery Lane, in
the County of Middlesex, Mechanical Draughtsman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Nineteenth day of April, in the year
of our Lord One thousand eight hundred and seventy, in the thirty-third
year of Her reign, did, for Herself, Her heirs and successors, give

page_text: and grant unto me, the said Alfred Vincent Newton, Her special
licence, that I, the said Alfred Vincent Newton, my executors, adminis-
trators, and assigns, or such others as I, the said Alfred Vincent Newton,
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
"AN IMPROVED DEVICE FOR OPERATING THE THROTTLE VALVE OR REGULATOR IN
LOCOMOTIVE ENGINES AND FOR OTHER LIKE PURPOSES," being a communication
to me from abroad by Henry Leffert Brevoort, of Brooklyn, in the
State of New York, United States of America, upon the condition
(amongst others) that I, the said Alfred Vincent Newton, my executors
or administrators, by an instrument in writing under my, or their, or
one of their hands and scals, 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 Scal
Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that I, the said Alfred Vincent Newton, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and by
the following statement, reference being had to the Drawing hereunto
annexed, and to the letters and figuresmarked thereon (that is to say):
1
This Invention is mainly designed to be used for operating the
throttle valve or regulator in locomotive engines, and such application
of the Invention has for its object to provide as may be required either
for a quick opening and closing movement of the valve, or for a slower
movement with an accurate adjustment, and to obtain increased facility
for starting the valve in case of its sticking, and for securing the same
in any position.
The Invention consists in a certain combination of a regulating screw
with a hand lever and an adjustable locking device made to gear with
and ungear from the screw, whereby on engaging the screw with
the lever by the intervention of the locking device the regulating screw
may be worked to actuate the lever and valve or contrivance operated
by it. This locking device which is made capable of gearing with and
ungearing from the screw will, moreover, serve as a stop to hold the

page_text: lever at a fixed position, and on disengaging the lever from the screw
the lever will be free to perform its work irrespectively of the screw.
The improved apparatus is applicable as an operating device to a
variety of purposes, but it will suffice here to limit its description to
operating the throttle or regulating valve of a locomotive engine.
Having thus specified the object and nature of the Invention, its
description will be proceeded with in reference to the accompanying
Drawing. Fig. 1 represents a side view or elevation of the combined.
screw and lever operating device as applied to actuating the regulating
valve of a locomotive engine. Fig. 2 is a sectional side or similar view
of the-same, and Fig. 3.a view or-clevation.at right angles to Figures 1
and 2, the same being a section taken as indicated by the line x, x,
in Fig. 2.
Referring to the accompanying Drawing, A represents the end of the
boiler; B is a lever having its fulcrum as at a, a, for operating the
regulating valve through'a rod or stem C. In connection with this
lever is arranged a screw D, which has a fixed point of suspension or
attachment so far as regards the restricting of its movement in a
longitudinal direction, but admitting of its free rotation as by ball-and-
socket joint to a projection b on the end of the boiler. This screw D is
made to engage and disengage with the lever B as required in the
following manner:-The screw D passes freely through an eye c in the
lever B; on the back of this lever is arranged a slide E, that forms a
half box to the screw, and is held in gear therewith by a coiled spring
d arranged within a box e fast to the lever. F is a secondary lever
or bent arm which is pivotted as at f to the slide E, and has its fulcrum
as at g on the main lever B, in proximity to the rear or handle portion
of which it is arranged. From this description it will be seen that
in case of the valve sticking when necessary to start it and it being
difficult to move it by direct application of power to the lever B, or
whenever, in fact, a slow or gradual motion is desirable, as for instance,
in effecting a slight or nice adjustment of the valve, then the slide E
being in gear with the screw D, the valve stem C may be operated
by turning the screw through a disc or hand wheel h on its outer end,
the power applied to the screw in such case being communicated through
the slide or half box E and lever B to the valve stem. When a quick
movement, however, of the valve is required, as, for instance, immediately
after the latter has been started through the agency of the screw as

page_text: described, or at other times when a considerable motion in contradistinction
to a mere slight adjustment is necessary to be given to the valve, then
by applying the hand to the handle portion of the lever B and so as
in clutching the latter to press the bent arm F towards said lever, the
slide or half box E is drawn out of gear with the screw D (the spring
d being compressed), and the lever B is used independently and
irrespectively of the screw to operate the valve. Again, after the valve
has been thus moved or adjusted by direct application of power to the
lever B it is held at its set through the locking of the lever with the
screw D by the spring a throwing the slide E into gear with the screw
on release of the hand from grasp of the lever B and bent arm F.
Ilaving now set forth the nature of the Invention of "An Improved
Device for Operating the Throttle Valve or Regulator in Locomotive
Engines, and for other like Purposes," and having explained the manner
of carrying the same into effect, I wish it to be understood that under
the above in part recited Letters Patent I claim, the combination of
the screw D, lever B, and locking device E with the valve stem C, or
other analogous device substantially as set forth.
In witness whereof, I, the said Alfred Vincent Newton, have here-
unto set my hand and seal, the Eighteenth day of October,
in the year of our Lord One thousand eight hundred and
seventy.