Year: 1886

page_text: Date of Application, 10th Apr., 1886.
Complete Left, 10th Jan., 1887.
Complete Accepted, 11th Feb., 1887
པ་ས་
hereby declare the nature of this invention to be as follows:-
My invention relates to points for Tramways or Railways which are constructed on
the following improved method.
The objects of my invention are firstly to control the direction of the wheels in entering
the points secondly to prevent shocks to the rolling stock when trailing through the
points and thirdly to ensure the points not getting out of working order through the
presence of road dirt.
In order that vehicles travelling in the same direction shall always take the same
road I construct a Fixed Point by forming in the body of the casting a recess in which
is held a piece capable of revolving on a longitudinal axis-One or more grooves to
admit the flanges of the wheels are formed on the surface of the revolving piece
which is rotated by the pressure of the wheels alone or in combination with a weighted
lévér spring or other equivalent either being arranged so that the revolving piece may
be left in a normal position for entering and also free to trail.
Where it is necessary that vehicles travelling in the same direction shall take
either of two roads I arrange the revolving piece as a Moveable Point so that it can
be set by hand to whichever road is required instead of being automatic as in the case
of the Fixed Point.
An arrangement is provided to lock the revolving piece both in the Fixed and
Moveable Points when it is set for vehicles entering.

page_text: I GEORGE JAMES CHAPMAN London Road Enfield Town Civil Engineer do hereby
declare the nature of this 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 Points for Tramways or Railways constructed as herein-
after described.
The objects of my invention are firstly to control the direction of the wheels of the
Engines and Cars in entering points secondly to prevent shocks to the rolling stock
when trailing through same and thirdly to ensure their not getting out of working
order through the presence of road dirt.
In order that vehicles travelling in the same direction shall always take the same
road I construct a Fixed Point by forming in the body of the casting a recess in which
is held a piece capable of revolving on a longitudinal axis-Grooves to admit the
flanges of the wheels are formed on the surface of the revolving piece which is
rotated by the wheels of the yehicles when trailing through the point and is also
thereby left in a normal position for vehicles to enter the proper road of the point.
My improvements are illustrated in the accompanying drawing in which
Figure 1 is a plan of my Automatic Fixed Point.
Figure 2 is a cross section on line X X Figure 1.
Figure 3 is a cross section on line Y Y Figure 1.
The Fixed Point shewn in Figures 1 to 3 is operated automatically by the vehicles
and is intended chiefly for use at passing places on a single line where the vehicles are
usually required to take the left hand road as indicated by arrows on the plan. The
revolving piece is fitted in a recess formed in the casting a and is secured to same
by a longitudinal axis ¹-On the surface of the revolving piece grooves b² are formed
to receive the flanges of the wheels-To the casting a is attached a locking spring c
or other equivalent which allows the revolving piece to be rotated in one direction
only and also holds same in a normal position for vehicles to enter the point.
The operation of this point is as follows, that is to say -A wheel trailing through
the point gradually rotates the revolving piece b during which the locking arrange-
ment c is released and allowed to return to a normal position at the completion of one-
fourth of a revolution-The revolving piece in thus left ready to guide wheels entering
the point into the left hand road.
I may however cumploy a weighted lever spring or other equivalent to assist the
rotating of the revolving piece.
In some cases also I make the revolving piece tapering in length instead of parallel.
Having now particularly described and ascertained the nature of my said Invention,
and in what manner the same is to be performed I declare that what I claim is:
In or for a Tramway or Railway a Fixed Point having a longitudinal revolving
piece arranged to be operated by the wheels of the Engines and Cars alone, or in com-
bination with a weighted lever spring or other equivalent for the purposes specified.
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