Improvements in Apparatus for Operating Railway or Analogous Signals by Joint Action from Two or More Places.
Year: 1886

page_text: 1
Improvements in Apparatus for Operating Railway or Analogous
Signals by Joint Action from Two or More Places.
I GEORGE EDWARDS Managing Director of the Railway Signal Company (Limited)
of Fazakerly, Liverpool in the County of Lancaster, do hereby declare the nature of
this Invention to be as follows:-
"
My Invention relates to improvements in what are technically known as co-acting
levers or slots for railway or analogous signals whereby one signal is controlled from
several signal stations and my Invention is applicable to signal arms which are
provided with balanced or weighted arrangements so that they assume the "danger
position in the event of breaking or derangement of the gearing. According to my
Invention I provide the ordinary weighted balance levers each worked from different
signal stations. I also provide links or toggle levers pivotted together, the studs of
the alternate joints engaging in vertical guides or slots the other joints of the links or
toggles being each connected to one of the balance levers by the bell crank arm
thereof. The signal arm rod is arranged so that its upward movement puts the signal
arm to the "all right," position. There is a cross head on the bottom of the said rod
which works in the guide or slot in which the stud of the upper joint of the links or
toggles works.
When the lower balance lever is lifted by the lever in one signal
cabin being pulled over, the bell crank arm thereof and the lower number of the links
or toggles assume a vertical linement (or an approximation thereto) the pivot or stud
which joins this link to the next running upward in its guide and by the same move-
ment the other members of the links or toggles cause the stud which runs in the upper
guide to be moved upwards until the said stud touches the cross head of the signal
rod but does not operate it. When the other balance lever is operated from the
second signal cabin the upper members of the links or toggles are forced into or
TD027

page_text: towards linement and the stud in the upper guide is moved further upwards and
through the cross head which it bears upon forces the signal rod upwards to put the
signal arm to "all right."
The same result is obtained if the upper balance lever be operated first and the
lower balance lever afterwards.
When it is desired that the signal shall be controlled from more than two stations
repetitions of the balance levers and links are provided in accordance with the number
of such stations.
Dated this 25th day of October 1886
J. HENRY JOHNSON,
47, Lincoln's Inn Fields, London,
Agent for the said George Edwards.

page_text: Improvements in Apparatus for Operating Railway or Analogous
Signals by Joint Action from Two or More Places.
1, GEORGE EDWARDS Managing Director of the Railway Signal Company (Limited)
of Fazakerley, Liverpool in the County of Lancaster 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 improvements in what are technically known as co-acting
levers or slots for railway or analogous signals whereby one signal is controlled from
several signal stations and my Invention is applicable to signal arms which are
provided with balanced or weighted arrangements so that they assume the "danger
position in the event of breaking or derangement of the gearing. According to my
Invention I provide the ordinary weighted balance levers each worked from different
signal stations. I also provide links or toggle levers pivotted together the studs of
the alternate joints engaging in vertical guides or slots the other joints of the links
or toggles being each connected to one of the balance levers by the bell crank arm
thereof. The signal arm rod is arranged so that its upward movement puts the
signal arm to the "all right" position. There is a cross head on the bottom of
the said rod which works in the guide or slot in which the stud of the upper joint
of the links or toggles works. When one of the balance levers is lifted by the
lever in one signal cabin being pulled over and the bell crank attached thereto is
thereby actuated the links or toggles assume a vertical linement (or an approximation
thereto) the pivot or stud running downward in its guide until the said stud touches the
cross head attached to the other lever but does not operate the signal rod. When the
other balance lever is operated from the second signal cabin the members of the links
or toggles are forced upwards and through the cross head which it bears upon forces
the signal rod upwards to put the signal arm to "all right."
The same result is obtained whichever balance lever is first operated.
Where it is desired that the signal shall be controlled from more than two stations
repetitions of the balance levers and links are provided in accordance with the number
of such stations.
And in order that my said Invention may be fully understood I shall now proceed
more particularly to describe the same and for that purpose shall refer to the annexed
drawing which represents in elevation (Fig. 1) and in section (Figure 2) an arrange-
ment of apparatus according to my Invention.
A B are ordinary weighted balance levers, the lever A being worked from one
signal station and the lever B being worked from another signal station.
D D' are links or toggles pivotted together and with studs M M¹upon them working
in guides G G in a plate or casting fixed to the signal post.
E is the signal rod depending from the signal arm and attached thereto, the upward
motion of which rod forces the signal arm to the "all right" position.

page_text: F is a projection from the bottom of this rod which works in the guide G.
When the lever A is lifted by the lever in one signal cabin being pulled over, the
links D D assume a vertical line the pivot M being forced down in slide G² it
reaches the crosshead H attached to the lever B but exerts no influence on the rod E.
When the balance lever B is lifted by the lever in the second signal cabin to which
it is attached being pulled over the crosshead H is lifted upwards and the links I) D'
having already been brought into contact with it by the previous lifting of the balance
lever A the signal rod E is forced upwards and the signal arm to which it is attached
brought to the "all right" position.
The same result is obtained whether the balance lever B be lifted first and the
balance lever A second or vice versa.
Where it is necessary for the signal to be controlled by more than two signalmen
the result can be obtained by the introduction of additional levers similar to A B and
additional links or toggle joints similar to D D'.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed 1 declare that what I claim is.-
In apparatus for operating railway or other analogous signals so that they are
controlled from two or more stations the employment of links or toggles operated by
the balanced levers and operating upon the signal substantially as hereinbefore
described.
Dated this and do of A1007