Improvements in Electrical Dial Indicating and Communicating Apparatus.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Electrical Dial Indicating and Communicating
Apparatus.
I, ARTHUR EDWARD BUTCHER, Captain Royal Artillery, Ootacamund,
Madras, India, do hereby declare the nature of this invention to be as follows:-
This invention relates to mechanism for electrically transmitting motion to an
index at a distant station so as to cause it to follow or repeat the motions of an
index or of a sighting device directed towards a moving object at the transmitting
station.
The invention comprises a transmitter and a receiver capable of being electrically
connected.
The transmitter consists of an index movable over a dial and actuated in either
direction through worm gear from a shaft provided with a make-and-break wheel
whereby intermittent currents are sent to the receiver, and a reversing commutator
whereby the direction of the currents is automatically reversed when the direction
of motion cf the index is reversed. The make-and-break is a notched wheel with
contact springs and the commutator consists of segments carried by an insulating
block connected by clip springs with the worm shaft and capable of participating
in the rotary motion of the shaft only to such a limited extent as is necessary to
cause the contact springs to be transfered from the one to the other of the segments
so as to, thereby reverse the direction of the current, the said segments being
respectively in connection the one with the one pole and the other, through the
make-and-brenk, with the other pole whilst the commutator springs are respectively
connected to earth and line.
The receiver comprises an electro-magnet propelment being a magnet whose
armature imparts under the control of a detent step-by-step motion to a ratchet
wheel whose spindle is capable of being geared through reversing gear with a
worm shaft operating a worm wheel whose spindle carries an index moving over
the receiver dial. The reversing gear which may consist of oppositely bevelled
wheels carried by a sliding sleeve splined to the worm shaft either of which may
be thrown into gear with an intermediate bevel wheel on the propelment wheel shaft
by the action of a polarized relay in circuit with the propelment electro-magnet and
whose magnetized armature is connected to the sliding collar of the reversing gear
and throws the same into one or other position according to the direction of the
current impulses received from the transmitter so that as the index or other moving
part of the transmitter is revolved in the one or other direction as above described,
positive or negative current impulses will be sent through the line to the transmitter
where entering the relay, the reversing gear will be placed in the one or other
position, and the electro-magnetic propelment will be actuated and motion be
transmitted to the receiver index in the one or other direction so that its motion
will always correspond to that of the transmitting instrument.
Dated this 20th dow of February 1996
A. M. & WM. CLARK,
53, Chancery Lane, London, Chartered Patent Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Electrical Dial Indicating and Communicating
Apparatus.
I, ARTHUR EDWARD BUTCHER, Captain, Royal Artillery, Ootacamund
Nilgiris, Madras, India 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 :-
The invention which is for electric communication, consists of two separate
instruments capable of being connected by wires. The instruments are
(a) The transmitter (Sheet No. 1 Fig. 1).
(b) The receiver (Sheet No. III Fig. 1).
The transmitter consists of
(I) A needle finger "A" capable of revolving in either direction and actuated
by a worm wheel "B" and worm shaft "B₁."
(II) A make and break wheel "C" which is for sending intermittent currents
of electricity to the receiver. This wheel is fixed to the worm shaft "B₁" and
revolves with it. Its notched form is shown at Fig. 3. Sheet II.
(III) A reversing key "D," by means of which the current sent to the receiver
is automatically reversed the moment the finger "A" of the transmitter is worked
back thus ensuring the finger of the receiving dial following that of the transmitter.
The key "D" consists of an ebonite block connected with the worm shaft "B₁"
by clip springs "E," "E." This block is capable of revolving 2 of a circle, its
movement being limited by a stop "F." One end of the abovementioned ebonite
block is fitted with a brass cap in halves (S. S₁) which halves are insulated
from one another. The top half S of the cap is permanently connected with
the binding screw, and the bottom half "S," with the make and break
wheel "C." The two halves "S" and "S₁" have, further, a rubbing contact
with the springs "G" and "H" which springs are permanently connected with the
binding screws marked 1 and 2.
The receiver (Fig. 1 Sheet III) is composed of
(I) An electro magnet "J" working a ratchet wheel "K."
(II) A ratchet wheel "K" which is fixed to, and actuates a shaft on the end of
which is a bevel wheel "L."
(III) A worm shaft "M" which works the wheel "N," to the spindle of which
the dial finger is attached.
(IV) A sliding collar to the ends of which the bevel wheels "O" "P" are
attached.
(V) A permanent magnet pivoted at "Q" with its south pole between the
poles R," "T" of an electro magnet. This magnet forms a clutch lever by which
the collar "OP" is worked.
(VI) Two electro magnets "R," "T" joined in series and forming with the
permanent magnet clutch lever a polarized relay.
(VII) A toothed wheel "V" into which a stop falls at each movement of the
ratchet wheel thus preventing this ratchet wheel advancing more than one tooth at
a time.
MANNER OF WORKING.
"
On turning the handle "W" (Fig. 1 Sheet No. 1) of the transmitter from right
to left the top half "S" of the cap "D" is put into contact with the
spring "G
and the bottom half "S" of the cap into contact with the spring "H" and these
contacts are maintained by means of the stop "F" so long as the handle "W"

page_text: continues to be turned from right to left, and a positive intermittent current is sent
to line by means of the wheel "C" which makes and breaks contact with the
spring "X."
This positive current on arriving at the receiver (Fig. 1 Sheet III) passes
through the magnets "R" "T" of the relay making "R" a north pole and "T"
a south pole and consequently the south pole of the permanent magnet "Q" is
attracted by the north pole "R" of the electro magnet, and the bevel wheel "O"
is brought into gear with the bevel wheel "L." This causes the worm shaft "M"
and consequently the wheel "N" carrying the dial finger to travel in one direction.
The current after going through the relay goes through the electro magnet "J"
which works the ratchet wheel "K" by means of a pawl and thus supplies the
motive power.
Now on the handle "W" of the transmitter being reversed the current sent to
line is automatically reversed by means of the key "D" and a negative current
passes through the polarized relay "RT" making "R" a south pole and "T" &
north pole. This throws the permanent magnet "Q" over and brings the bevel
wheel "P" into gear with the bevel wheel L and thus reverses the worm shaft "M"
and consequently the finger of the dial.
The following is a statement as to what the figures in the drawings represent.
Fig. 1. Sheet No. I The transmitter.
Fig. 1 Sheet No. II Longitudinal section on d e Sheet No. I.
Fig. 2 Sheet No. II Cross section on H G Sheet No. I.
Fig. 3 Sheet No. II Cross section on cx Sheet No. I.
Fig. 1 Sheet No. III
Fig. 2 Sheet No. III
The receiver.
Section on j k Sheet No. III.
Having now particularly described and ascertained the nature of my said inven-
tion, aud in, what manner the same is to be performed, I declare that what I
claim is
(1.) A combination consisting of a worm wheel and shaft, a make and break
wheel, and an automatic reversing key as shown in Fig. 1 Sheet No. I, the whole
constituting a transmitter for an "electric dial."
(2.) An automatic reversing key consisting of the parts enumerated above under
transmitter III, and shewn in Fig. 1 Sheet No. I "D."
(3.) A combination consisting of an electro magnet working a ratchet pawl
Fig. 2 Sheet III-a ratchet wheel--a polarized relay-and a reversing arrange-
ment consisting of a sliding collar and bevel wheels as shown in Fig. 1
Sheet No. III. The whole constituting a receiver for an "electric dial."
(4.) The reversing arrangement consisting of a sliding collar and 2 bevel wheels
worked by a clutch lever actuated by a polarized relay. This arrangement is
shown at "O P," "Q," "RT" Fig. 1 Sheet No. III.
Dated this Twentieth day of October 1896.
A. BUTCHER,
Capt. R.A.