STOPPING LOCOMOTIVE AND OTHER ENGINES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I MARK WHITTINGHAM BULLEN of Barnard Castle in the County of Durham,
Mining Engincer do hereby declare the nature of my invention for STOPPING
LOCOMOTIVE AND OTHER ENGINES to be as follows :—
One common handle wheel or lever to move both the valve or tap which admits
steam to the cylinders of the Engine and the valve or tap which puts the break in
action.
CUMLELE
SPECIFICATION.
I MARK WHITTINGHAM BULLEN of Barnard Castle in the County of Durham
Mining Engineer do hereby declare the nature of my invention for AN IMPROVED
SAFETY ARRANGEMENT FOR STOPPING LOCOMOTIVE AND OTHER ENGINES and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This invention has for its object to simplify the operations by which an Engine
or an Engine with a Train connected with it can be brought to a state of rest and
thereby to diminish the risk of accident. In order to do this I move the valve
tap or other device which actuates the motive power and the valve tap or device
which actuates the Brake by one common handle making the movement of the
two parts mutually dependent on each other so that whereas the person desiring to
stop the engine had two separate and independant acts to perform to that end he
by the use of my invention has one only.
It is obvious that the advantages to be obtained by the use of one handle being
discovered the connecting of it with the other working parts may be accomplished
by a great variety of simple mechanical means but in order that my invention may

page_text: be thoroughly understood I now particularly describe one method the use of which
I specially recommend by which the single handle may be made to perform this
double function.
The letters of reference following refer to the accompanying drawing.-A is the
drivers throttle valve handle B is the throttle valve spindle C, D the ends of the
quadrant which limits the movement of the handle A.-E is a rod of which
the upper part screws into the handle A and the lower part ends in a joint or
double eye, FG is a rod ending at F in a single eye working vertically on a pin
through the double eye E and at G in a double eye it is made in two parts coupled
together with a right and left banded screw coupling H. When this arrangement
is adapted to a brake worked by an ejector the rod F G is made sufficiently long to
enable it by means of a right angled bell crank to be coupled to the ejector steam
cock such steam cock being constructed as hereafter described when this arrange-
ment is adapted to brakes operated by releasing compressed air or admitting air
to enter a partial vacuum the double eye at the end G of the rod F G is
attached to the valve IK which consists of a cylindrical rod partly solid and
partly hollow working through a stuffing box or gland in a long and narrow
cylinder the hollow portion of this rod is perforated by a great number of minute
holes the end K is fixed to a branch pipe leading from the main brake pipe of the
train to such a point upon the engine as may be convenient for the adjustinent of
the valve I K
The apparatus being thus arranged it opperates in the following manner in an
ordinary engine the steam is full on when the handle A is in the position C and off
when in the position D.-I so arrange the throttle valve that the steam shall
be full on when A is at C and off when A is vertical or slightly inclined from the
vertical on either side and I give the throttle valve such an amount of lap that
the bandle A can be brought to the position D the throttle valve remaining closed
but the movement of A from a vertical or nearly vertical position to D will have
pulled the rod F G to the left and have opened the ejector cock which is made
with sufficient lap to allow the handle A to be moved to the position C or if G be
attatched to to the valve I K it will have pulled out that part of the cylindrical rod
which is hollow and perforated and allowed compressed air to escape or air to be
admitted to a vacuum.
In order to adjust the brakes the handle A is placed slightly to the right of the
upright position towards D and the screw coupling H turned inward or outward
till the brake guage just begins to move.
The Engine or the Engine and Train being stopped the throttle valve handle is
moved back to a nearly vertical position and the Brakes are taken off by the
Valves and Handles at present in use.
Having now particularly described and ascertained the nature of my said
invention and a manner by which the same may be performed I declare that what
I claim is
In Locomotive and other Engines the employment of the single handle with
which to control both the motive and the retarding power.
Dated this 29th day of June 1885.
Witness to the above signature
C. B. MARTIN,
Barnard Castle,
Retired Chemist.
MARK W. BULLEN.