A New or Improved Electric Indicator.
Year: 1891

page_text: Date of Application, 27th Nov., 1891
Complete Specification Left, 23rd Dec., 1391-Accepted, 30th Jan., 1892
PROVISIONAL SPECIFICATION.
A New or Improved Electric Indicator.
We HAROLD WILLIAM THATCHER and ARTHUR DEVEREUX both of
10 Cowley Street Westminster Gentlemen do hereby declare the nature of this
invention to be as follows:-
Our invention relates to an improved electric apparatus for furnishing indications
by means of a pointer moved upon a dial either for indicating stations in railway
carriages for telegraphic or for any other purpose in which the step by step action
of a pointer can be utilized.
In carrying our invention into practice we provide an escapement wheel mounted
upon an axis held in any suitable manner and carrying on its outer end a hand or
pointer moving upon a dial furnished with names of stations or with any other
suitable indications divisions and the like. In close proximity to the said escape-
ment wheel is arranged a spring and an electro-magnet the armature of which is
mounted on the said spring and carries an anchor or pallets engaging with the said
wheel in the same manner as in clock work. We further provide an electric
battery to the two poles of which are attached two wires leading to the electro
magnet and to a suitable contact making device by means of which the apparatus
is operated a tooth of the escapement, wheel being moved each time contact is
established.
As our improvements are capable of some modification without departing from
the principle thereof we do not restrict ourselves to materials dimensions or to the
precise form placement of the several parts thereof.
Dated this 7+1 law of N 1001
F. G. CASSELL,
22, Glasshouse Street, Regent Street, London, W.,
Agent for the Applicants.
COMPLETE SPECIFICATION.
A New or Improved Electric Indicator.
We HAROLD WILLIAM THATCHER and ARTHUR DEVEREUX both of
10 Cowley Street Westminster Gentlemen 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:-
Our invention relates to an improved electric apparatus for finishing indications
by means of a pointer moved upon a dial either for indicating stations in railway
carriages for telegraphic, or other purposes in which the step by step action of a
pointer can be utilized.
In carrying our invention into practice we provide an escapement wheel, mounted
upon an axis held in any suitable manner and carrying on its outer end a hand or
pointer moving upon a dial furnished with names of stations or with any other
suitable indications, divisions, and the like. In close proximity to the said escape-
ment wheel is arranged a spring and an electro magnet the armature of which
carries an anchor engaging with the said wheel in the same manner as in clock
work.
We further provide an electric battery to the two poles of which are attached
two wires leading to the electro magnet and to a suitable contact making device by
means of which the apparatus is operated, a tooth of the escapement wheel being
moved each time contact is established.

page_text: This contact may be effected by any suitable contact making or breaking device
such as a toothed wheel the teeth of which come into contact with a metallic strip
or spring &c.
In the accompanying drawings
Fig. is a view showing one manner of carrying our invention into practice.
Fig. 1 is a view of a modification of the said invention.
Fig. 2 is a plan of Fig. 1A.
Fig. 3 is a front view of one contact making and breaking device.
Fig. 4 is a front view of another similar device.
Fig. 5 is a diagrammatic view illustrating the application of our invention to
railway carriages.
Referring to Fig. 1a is the escapemment wheel mounted upon an axis 2 secured
to the plate or block P. Within the teeth of this wheel engage the curved ends of
the anchor pivotted at and carrying the armature e the spring s bearing at one
end upon the anchor band is secured at the other to the plate or block P. is the
electro-magnet one pole of which is connected by the wire w to the electric battery
(not shown on the drawing) placed in any convenient part of the guard's van: the
other wire being connected to the contact making or breaking device in the
manner hereinafter more fully set forth in the arrangement described in Fig. 1^
which we use by preference.
In the arrangement shown in the said Fig. 14 the escapement wheel a is mounted
upon an axis fixed to the bracket P¹ secured to the plate P. Upon this axis
is mounted the index or hand moving upon the dial & fixed to the plate or
board P by means of brackets as shown in Fig. 2. Upon the said dial are marked
in a consecutive circular row the various stations at which the train stops.
The anchor bengaging with the wheel a is pivotted at upon the bracket P
and carries a pine with which engages the forked end of the bar d fixed at its
other end to the armature e. The latter is fixed to a spring s which is screwed to
the frame A carrying the two electro magnets gg'; f. are adjustable screws used
to limit the motion of the bar d.
The electric connection is as follows; the electro-magnet is connected by a
wire to the binding screw while the electro magnet gis connected by a wire to
the small plate; the latter carries a binding screw which holds one of the
wires of the contact making and breaking device the other wire of which is
connected to the binding screw of the small plate .
The contact making and breaking devices which we prefer to use are shown in
Figs. 13. and 4. In Fig. 1 we merely use an ordinary electric bell push actuated
by the knob q which need not be further described.
P
In the arrangement shown in Fig. 3 is a case, open at the top and carrying a
central spindlet supported morcover by the cross bar o and upon which is mounted
a toothed wheel m. a handle being fixed to the top of the same spindle. n is a
strip of metal fixed at one end to the side of the case its outer end forming a
spring contact engaging with the teeth of the wheel m; the strip n is connected by
a wire to the binding screw while the cross bar o is connected by the wire of to
the binding screw (Figs. 14 and 3). A pawl H prevents the wheel from being
turned in the wrong direction.
The arrangement shown in Fig. 4 consists of a wheel m. of peculiar shape and
preferably of wood or other non conducting material. This wheel is mounted upon
a spindle carrying a handle P. The periphery of the wheel m is divided into
double as many notches as there are teeth in the escapement wheel a, every
alternate notch being covered with a brass or other metallic strip m² to form a
contact with the spring . bearing thereon, and which may carry a contact point if
necessary. The forward edges of the said notches are bare in order to prevent a
contact being established should the wheel be turned backward. The electric
connection is effected by putting the wire to in communication with the binding
screw and. the wire w' with the screw . As shown in Fig. 5 one indicator is
placed in each compartment of the carriages C its wires passing along the top of

page_text: the carriages or by the side thereof in order to reach the guards van G. where the
battery B and the contact making and breaking device are placed and actuated at
each station by turning the handle of the wheel m. for instance a tooth for each
station thus causing the escapement wheel in each carriage to turn one tooth at a
time and the pointer to move to the next station forward on the dial.
As our improvements are capable of some modification without departing from
the principle thereof we do not restrict ourselves to materials dimensions, or to the
precise form or placement of the several parts thereof.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is
1. The improved means for indicating by electricity in the various carriage
composing a railway train, the names of the stations at which stoppages are effected
substantially as herein described and shown.
2. The improved step by step indicating apparatus constructed substantially as
herein described and shown
F. G. CASSELL,
22, Glasshouse Street, Regent Street, London, W.,
Agent for the Applicants.