Year: 1886

page_text: We HENRY WILLIAMS of Albert Drive Crosshill Glasgow Engineer and ANDREW
WILLIAMSON of Park Circus Place Glasgow Accountant seek leave to amend the
specification and drawings in an application for Letters Patent, No. 1152 of 1886,
as shown in red ink in the copy of the original specification hereunto annexed and
in the sheet of drawings also annexed.
Our reason for making this amendment is as follows:-
That we have been informed that certain improvements claimed in such
specification are not tenable in law.
HENDY WILLIAMO
In the Matter of the Application made by Henry Williams and Andrew Williamson
for leave to amend the Specification filed by them in pursuance of their
application for Letters Patent N° 1152 of 1886:

page_text: We, HENRY WILLIAMS of Albert Drive Crosshill Glasgow Engineer and ANDREW
WILLIAMSON of Park Circus Place Glasgow Accountant 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 reference
being had to the accompanying drawing forming a part of this specification:-
This invention consists in improvements in railway signalling apparatus and
relates to signals which are designed to be worked and controlled from two or
more independent cabins or places conjointly but which cannot be operated from
one of such cabins or places alone. The main object of the said invention is to
provide means whereby in the event of a connecting rod or any other connection
whatsoever breaking or being damaged the signal will be allowed to rise or go to
danger" or in other words the heavy balance arm upon the semaphore proper will
be left free to carry the same to such "danger" position.
"
Our invention is illustrated in the accompanying drawing in which
Figure 1 is an elevation of a railway signal post with our improvements
applied to the same the parts being shewn in the position they occupy when the
semaphore arm has been "pushed off" to a position indicating caution or safety.
Figure 2 is a front view and
Figure 3 a side view partly in section drawn to an enlarged scale of the said
improvements detached.
Figure 4-is-a-similar view to Figure-3-chewing-the-parts in a different
position.
The remaining Figures are hereinafter--described and Like letters indicate
corresponding parts throughout the drawing.
c is the
a represents the signal post proper and 6 the semaphore arm thereof.
connecting rod for operating the said arm and d d are the ordinary balance or
weighted levers designed to be actuated through suitable connections from- the
independent cabins or places.
In carrying our invention into practice as illustrated in Figures 1 to 4 we
arrange in suitable bearings e¹ upon the framing e attached to the signal post a
vertically sliding rod or bar f that is connected to the rod c combined with the
semaphore arm b. This arm is normally held in a position indicating danger by
means of the heavy balance hereinbefore referred to and is also returned to such
position thereby when the rod o is released. To the rod or bar f we secure a piece i
which is adapted to move laterally or sideways. The lower end of this piece i is
provided with curved or inclined surfaces at one of which when the said piece i
is in its normal position and the arm bis at danger, occupyies a position in the line
of movement of the balance levers d. The portions of these balance levers which are
designed to act upon the inclined surfaces of the piece i we also preferably make
inclined or bevelled so as to facilitate their action in imparting a lateral movement
to such piece . i' represents-an extension-ortail pieve on-the-part-i-to-prevent

page_text: the same receiving any undue or excessive Interal movement when a balanco lever
is-operated.
1
The operation of this apparatus is as follows that is to say:-Assuming that the
parts are in the position shewn in Figures 2 and 3 and one of the balance levers d
is "pulled off" from a cabin the inclined surface of its weighted end in rising will
come in contact with the lower inclined surface of the piece i and will force the
same laterally into the position shown in Figure 4 that is to say it will travel up
one side of the said piece and retain the same in the line of movement of the other
balance lever d without effecting any vertical movement of the bar for the rod c
connected thereto. When therefore this last named lever is operated its upper
Burface will impinge against the under surface of the piece i and as the latter is
retained in a definite position laterally by the lever d first moved such second lever
in its upward movement will lift the said piece i and the rod f bodily so that the
semaphore arm b will be "pushed off" to a position indicating safety or caution as
shewn in Figure 1. When both levers d have thus been operated the piece i will
be supported thereby. If however the signal wire or connection should break or
become deranged and either of such levers d is released either accidentally or
intentionally such piece i will be free to move laterally and to descend bodily with
the rod or barf and the semaphore arm will be immediately returned to danger by
the descent of its weighted or heavily balanced arm.
Instead of or in addition to- providing the laterally moving piece i-with an
extension or tail-piece to prevent any excessive or undue lateral movement of
such piece we sometimes form therein a slot through which a pin-f*-attached to
the-rod-or bar-f-passes, the length of such slot-determining the extent of movement
of the piece in either direction.
In Figure 5 we have shewn in side view a slight modification of the above
described arrangement. According to this modification we provide the inclined
surfaces i directly upon the vertically sliding. bar or rod f instead of upon a
separate piece i. For this purpose we enlarge-the upper portion of such bar as
shewn-and-provide for the lateral movement of the lower end of such bar or rod
due to the action thereon of either of the levers d, by forming a slot-e' in the lower
portion of the bracket c. The notion of this apparatus is substantially the same as
that above described.
In Figure 6 we have shewn in side view a further modification wherein the
levers-d-in-their movement are designed to act upon a It will be seen by reference
to the drawing that the piece i having the inclined surfaces i¹ and is adapted to
slide laterally within a slot or mortice in the rod or bar f. This piece i is retained
in such barf by the pin f* passing through a slot in the said piece. This slot
serves to govern or regulate the throw of the sliding piece i laterally. The action
is-similar to that of the devices herein before described in other words when-one
of the levers d is raised its upper inclined surface forces the piece i laterally over
the other lever and retains it there so that when such other lever is operated it lifts
the-piece-i-and-bar-f-bodily. When however one of the levers d again returns to
its-normal-position such bar f and piece-i-will-deseend as the piece-i-is-then-free
to-disengage itself from the other-lever-d.
Although in the above description we have described the piece i having the
inclined surfaces i¹ as adapted to be acted upon directly by the balance levers d it
will be evident that without departing from the spirit of our invention we can
arrange such piece i or its equivalent higher up the post and provide for operating
the same by suitable levers or pieces arranged adjacent thereto and connected by
rods or bars with the aforesaid balance levers near the base or foot of the post.
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed we declare that what
we claim is: —
First. In a railway signal such as is herein described the combination with the
rod or bar f connected with the semaphore arm, of the piece i adapted to be moved

page_text: laterally and to be controlled as to its movements by the balance levers d or
connections attached thereto substantially as herein set forth and for the purposes
specified.
Second. The combination with the red or bar if connected with the semaphore
arm-and-provided with an enlarged portion having inclined surfaces; of the balance
levers-d-or-connections attached thereto which in their operation impart a lateral
movement to the said red-or bar and through the same control the movements of
such-arm-substantially as herein set forth and for the purposes specified.
Third-The--combination with the red or bar f and the balance levers d-or
connections attached thereto of the laterally sliding piece i substantially as herein
set forth-and-for-the-purposes specified.