An improved Combined Movement for the Steam and Brake Valves of Locomotive and other Engines.
Year: 1886

page_text: •
An improved Combined Movement for the Steam and Brake
Valves of Locomotive and other Engines.
I MARK WHITTINGHAM BULLEN of Barnard Castle in the County of Durham
Mining Engineer do hereby declare the nature of this invention to be as
follows:-
One common handle which moves both the steam valve and brake valve but in
such a manner that at a certain point in the movement the brake valve is released
from any strain resulting from its being coupled to the steam valve. This I advise
to be effected by making the handle in two parts coupled together by a bolt acting
automatically at a certain point in the movement of this compound handle to one
part of which is attached the steam valve and to the other the brake valve. The
automatic action of the bolt above refered to is obtained by placing in the path of
the handle a suitable wedge shaped projection or camb which I prefer to fix on the
throttle valve handle guide.

page_text: Valves of Locomotive and other Engines.
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
COMBINED MOVEMENT FOR THE STEAM & BRAKE VALVES OF LOCOMOTIVE & 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 render more efficient the combined movement
of the Throttle Valve and Brake Valve of Locomotive and other Engines and
particularly to remove the strain which is found to arise when certain modifi-
cations of the Throttle Valve are coupled rigidly to the Brake Valve. In order to
do this I employ a handle which moves both the Steam and Brake Valves but in
such a manner that at a certain point in this movement the Brake Valve is
automatically released from any strain resulting from its being coupled to the
Steam Valve. It is obvious that the advantages resulting from thus facilitating the.
movement of the Brake Valve being discovered the result can be brought about
by a variety of simple mechanical contrivances but in order that my invention may
be thoroughly understood I now particularly describe one such method the use of
which I recommend and for that purpose refer to the accompanying drawing by the
letters of reference following.
A, is the Throttle Valve spindle B a short claw shaped arm fixed to it B¹ is
a handle of the same general shape as the present regulator handle but instead of
being rigidly attached to the spindle A it works freely round it or that part of the
short arm B which is fastened to it. E is a spring bolt fastened to B¹ it is made
hammer headed and in regard to part of such head it passes through a slot in B
not shown in the drawing and overhangs the Regulator Guide C and in regard to
the other part it rests in the notch shown in the short arm B. F is a cam or
wedge shaped projection fixed to the Regulator Guide C. G is a short arm or
continuation beyond the center of motion A of the handle B¹ and at G is attached
the rod actuating the Brake Valve. Lastly the Throttle Valve of the Engine is so
arranged that the steam shall be full on in the position shown and off when B B¹
is vertical or nearly vertical. Now when steam is full on B B¹ form one continuous
handle being joined together by the bolt E and they so continue during any
movement required for the regulation of the steam but if after the steam has been
shut off if the movement of B¹ be continued the bolt E will be raised out of the
notch in B by the cam F and while B remains stationary the independent movement
of B¹ can be continued to the right. By this further movement the Brake
Valves are actuated When the brakes are worked by putting an ejector in action
or admitting air to a partial vacuum the short arm G is connected by a suitable
series of rods with the ejector steam cock or other valve which is made with
sufficient lap to allow of the movement of B B' to F. In the case of the Westing-
house Brake I have contrived a special valve which I now describe but I do not
claim it as any part of my invention. This valve concists of a double piston R R¹

page_text: moving in a cylinder Y this piston is so arranged as shown in the drawing that
during the movement of B B to F no effect is produced upon the brake but on
the further movement of B¹ to the right R¹ shuts off the valve regulating the
supply of air from the main resevoire and a neutral position is produced R not
having advanced sufficiently to allow the air to escape from the main train pipe
through the holes at X but the double piston being moved still further these holes
will be opened and the brake put on.
Having now particularly described the nature of my said invention and a
manner by which the same may be performed I declare that what I claim is
In combined movments of the steam and brake valves of locomotive and other
engines the freeing of the brake valve at a certain point in the combined movement
from any strain resulting from its being coupled to the steam valve.
Dated this 94th day of Santambon 1906