An Improved Clip for Facing-point Lock-bars, and other Bars used in Railway Signalling.
Year: 1896

page_text: Date of Application, 9th Oct., 1896
Complete Specification Left, 9th July, 1897-Accepted, 14th Aug., 1897
PROVISIONAL SPECIFICATION.
An Improved Clip for Facing-point Lock-bars, and other Bars used in
Railway Signalling.
I, ARTHUR GEORGE EVANS, of 116 Palace Chambers, Westminster, in the County
of Middlesex, Civil Engineer, do hereby declare the nature of this invention
to be as follows:-
My invention has reference to improvements for keeping the facing-point
locking-bar, or a trailing-bar, or any bars used for signalling purposes, in their
correct position with reference to the rails. It also assists in the easy working
of the said bar.
The bar as at present in use works through an arc of approximately 45 degrees.
Owing to any loosening of parts or sagging of the bar it may move away from the
rail, and it might then be possible to operate the bar when a train is on the line.
With my invention I clip to the side of the sleeper, vertically, a bracket contain-
ing a friction roller or wheel at the top end and projecting below the friction roller,
an arm, the distance between the said friction roller and the arm being ample to
receive the stem of either a T, L, or straight bar.
When the bar is operated it rises, but the lower portion never gets free of the
space between the friction roller and the arm. When the bar is at rest, either in
the normal or worked position, the head of it is resting on the top of the arm aud
the friction roller.
Dated this 9th day of October 1896
JOHN P. O'DONNELL, Fel. Chart. Inst., P.A.,
70 and 71 Palace Chambers, Westminster, S.W.,
Agents for the said Applicant.
An Improved Clip for Facing-point Lock-bars, and other Bars used in
Railway Signalling.
I, ARTHUR GEORGE EVANS, of 116 Palace Chambers, Westminster, in the County
of Middlesex, 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 has reference to improvements for keeping the facing-point
locking-bar, or a trailing-bar, or any bars used for signalling purposes, in their
correct position with reference to the rails. It also assists, in the easy working
of the said bar.
The bar as at present in use works through an arc of approximately 45 degrees.

page_text: Owing to any loosening of parts or sagging of the bar it may move away from the
rail, and it might then be possible to operate the bar when a train is on the line.
With my invention I clip to the side of the sleeper, vertically, a bracket contain-
ing a friction roller or wheel at the top end, and projecting upwards from below
the friction roller an arm, the distance between the said friction roller and the arm
being ample to receive the stem of either a T, L, or straight bar.
In order that my invention may be better understood and more readily carried
into effect I will describe it with reference to the accompanying drawings in
which:-
Figure 1 is an elevation of my improved bar clip looking towards the end of a
facing-point lock bar.
Figure 2 is an elevation looking towards the side of the rail and Figure 3 is a
side view of a complete locking bar showing four of my clips attached to the
sleepers.
The same letters refer to the same parts in the several figures of the drawings.
a is the lower portion of the improved clip by which it is screwed or otherwise
attached to the sleeper, b is the upper portion which is forked and supports the
friction roller or wheel, c, d is the arm projecting from below the roller c between
which and said roller the lower portion c of the lock-bar fits and works. f is the
roller and (Figure 3) are ordinary rockers or half-cranks by which the bar is
operated.
As is well known a locking-bar in its operation rises for a certain distance, moves
longitudinally and then falls again, moving as before mentioned through an arc
of approximately 45 degrees. With my clip the bar rises as usual but the lower
portione never gets free of the space between the friction roller c and arm d so
that even should any looseness or sagging occur it is impossible for the bar to move
away from the rail in a lateral direction my improved clips (as many as desired
being employed for each bar) forming guides ensuring that it always works in
the same line close to the rail. The friction rollers c allow of casy upward move-
ment of the bar.
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
claim is:-
An improved clip for facing-point lock-bars and the like employed in railway
signalling, comprising a bracket supporting a friction roller and a projecting arm,
the bar working between said arm and friction roller, substantially as herein
described for the purpose specified and as illustrated in the accompanying
drawings.
Date
10 d. of T.... 1907
JOHN P. O'DONNELL, Fel. Chart. Inst., P.A.,
70 and 71 Palace Chambers, Westminster; S.W.,
Agents for the said Applicant.