WIRE COMPENSATOR
Year: 1885

page_text: I, JOHN NICHOLSON of 49 Claremont Street Gateshead on Tyne in the County
of Durham, Joiner, do hereby declare the nature of my invention for WIRE
COMPENSATOR to be as follows:-
This invention has for its object, the improvement, in apperatus, for counteracting,
or compensating the effect of variations of temperature, on the wire, between the
signal-arm and the signalmans lever, also between the railway points, and the
indecator, in the Cabin, to ensure that the length of the pull; that is to say, of
the wire or chain, between the signal-arm, and signalmans lever, also between the
railway points, and the indecator in the signal Cabin by which the signal and
points indecator are operated, shall be allowed to expand or contract, under
variation of temperature, and be at the same time, always kept taut or stented so
that the signal-arm, and the signalmans lever, the railway points and the indecator,
are practically always in the same possition, relatively with each other.
The apperatus constituting the said invention consists of a tube, rack slidė,
clutch, and links.
Haveing now explained the nature of my said inventon I will now proceid to
proticularly direct in what maner the same is to be carried into efect by the aid of
the following drawings.
Fig. 1 shows a sectional elevation with arm A connected to liver J the clutch B
lifted by the two links C into the chamber D so that the bar or rack E is reliced
leaving the wire to expand or contract with the vareation of temperature.
:
Fig. 2 shows arm A clutch B links C slide D and rack E in gear to pull signal
arm off.
Fig. 3 section of tubo at F. G Fig. 1.
Fig. 4 section of tube at H-I Fig. 1.
Fig. 5 plan of clutch B Fig. 2.
Fig. 6 plan of slide D Fig. 2.
The apperatus is economecal in its application and can be applyed to all signal
levers and what I clame is
1 The application of clutch and slide.
2nd Link motion to throw the clutch or catch out of gear so that the wire. may
expand or contract with the vareation of temperature.
3rd The direct action with the signal wire, with the weight M to keep the wire
taut the signal is pulled off with greater ease and requires no adjusting..
Dated this 3rd day of October 1885.
JOHN NICHOLSON..

page_text: pprove Automatic signa
compensator,
I JOHN NICHOLSON of 49 Claremont Street Gateshead on Tyne in the County
of Durham Joiner do, hereby declare the nature of my invention for SIGNAL WIRE
COMPENSATOR 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 the improvement in apperatus for counteracting
or compensating the effect of variations of temperature: on the wire between the
signal arm, and the signalmans lever also between the railway points and indicator
in the cabin to ensure that the length of the pull that is to say of the wire or chain
between the signal arm and signalmans lever also between the railway points and
the indicator in the signal cabin by which the signal and points indicator are
operated shall be allowed to expand or contract under vareation of temperature
and be at the same time always kept taut or stented so that the signal arm and
the signalmans lever the railway points and the indicator are practically always in
the same possition relatively with each other.
The apperatus constituting the said invention consists of a tube rack slide clutch
and links,
Having explained the nature of my said invention I will now proceid to pro-
ticularly direct in what manner the same is to be carried into efect by the aid of
the following drawings.
Fig. 1 shewes plan of wire compensator with opening in front plate to allow the
arm A to slide when the signalmans lever is operated.
Fig. 2 shewes sectional elevation of wire compensator the arm A is connected to
the signalmans lever and at the other end of arm A is connected clutch B links C
and slide D the clutch B is out of gear so the rack E is released to allow the wire
or chain to expand or contract with the vareation of temperature when the signal-
mans lever is operated the clutch B is brought into gear by the links C and slide D
with the rack E and is drawn through the tube or case which keeps them together
and pulls the signal off, and when the signalmans lever is put back the slide D comes
in contact with a stop H the clutch B is lifted by the link C into a chamber. in
the case and the rack E is again released so that the wire or chain may expand or
contract with the vareation of temperature, to one end of the rack E is attached the
signal wire or chain and passes under a pulley or pulleys to the signalarm, at the
other end of the rack E a weight or weights F is attached, and. counterbalances
the expantion or contraction of the wire which would have the effect of moving the
rack E upwards or downwards, that is to say wether the action of the atmosphere
has caused the wire to expand which would have the effect of moving the rack E
upwards, or to contracts which would move it downwards, immediately upon the
operating of the signalmans lever as aforesaid the clutch B takes into the teeth of
the rack E operated by the atmosphere and so rises or lowers it and places the
signal arm just as required as though no atmospheric change had taken place.

page_text: Fig. 3 shewes section at L. M Figs. 1 and 2 with clutch B links C slide D and
rack E.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I diclare that what
I clame is
1st The application of clutch rack and slide.
2nd Link motion so that the clutch is lifted into a chamber so that rack or wire
is released to allow the wire to expand or contract with the vareation of
temperature.