Year: 1886

page_text: Date of Application, 27th May, 1886.
Complete Left, 28th Feb., 1887.
Complete Accepted, 29th Apr., 1887.
1, WILHELM DOEHRING of Leipzig in the Empire of Germany, Government
Director of Building and Superintendant of the Leipzig Fire Brigade do hereby
declare the nature of this invention to be as follows:-
The invention relates to apparatus known as watchman detector apparatus in which
a watchman controlling or guarding certain series of stations is required to operate
certain telegraphic apparatus at each station to record the time and fact of his visit to
such station. The invention consists in an improved recording apparatus for use in
such systems.
The following is the construction of the improved recording clock which is set in
action by the current or interruption thereof produced by the watchman at each
station.
A clockwork causes a dial to revolve once in twelve or twentyfour hours, a second
clockwork is also arranged, which, when the current is disconnected, is released by
the armature of an electro-magnet, and which turns a toothed wheel once round its
axis. This tooth wheel gears into a toothed rack carrying a writing device, and
guided radially on the dial. A helical spring tends to retain the toothed rack in such
a position that the writing device is at the edge of the disc.
The axle carrying the wheel which gears into the rack is guided at its upper
extremity in a slit in the casing and is held by a spring with its toothed wheel pressed
against the toothed rack. After one revolution of the wheel however the axle is
automatically released by a lever from the toothed rack, and the latter is drawn into
its first position by the action of the spring. The writing lever is movable in a hinge
in the centre of the dial plate and when the current is disconnected, is pressed down
by the release of the arniature of an electromagnet, so that the writing wheel is
pressed on the dial plate and produces Morse signs corresponding to the interruptions
of the current, as the wheel is simultaneously moved forward by the running work.
Dated this 27th day of May 1886.

page_text: COMPLETE SPECIFICATION.
Improved Watchman Detector Apparatus.
I, WILHELM DOEHRING, of Leipzig, Germany, Government director of Building
and Superintendant of the Leipzig Fire Brigade, 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 :-
This invention consists in improvements in the apparatus by means of which the
rounds of a watchman may be recorded, and its purpose is to show if control has not
been properly made by the watchman at any station on his round or if the same has
not been made in due time.
Referring to the accompanying drawings
Fig. 1 is a front view of the device for recording the control on a moved disc.
Fig. 2 a side view of the same.
Fig. 3 a plan view of mechanism for disengaging the tooth bar carrying the writing
pen for allowing of its return.
Fig. 4 a side view of the same.
Fig. 5 the writing device on an enlarged scale.
Fig. 6 the same in the position for inking the writing wheel.
Fig. 7 a section thereof showing the writing wheel.
Fig. 8 a section thereof through the toothed bar.
Fig. 9 plan or front view of a modified form of such recording apparatus.
Fig. 10 vertical cross section of the same.
Fig. 11 the electrical clockwork engaging device.
Fig. 12 side view partly in cross section of the said apparatus.
Fig. 13 side view of the same as seen from the left of Fig. 9.
Fig. 14 side and plan views of the engaging and disengaging devices for the type
wheel movement.
The apparatus shown by Figs. 1-8 is placed in the office of the inspector or in some
other central place and is connected by a wire with the various controlling places, it
marks the round of the watchman by the impression of Morse signs on a dial.
The apparatus is arranged as follows:-
A clock work moves the disengageable dial Z within 12 (or 24) hours or other
convenient time once about its axis. Beside this clockwork is arranged a second
clockwork, which when the current is interrupted, is disengaged by the armature of
the electromagnet and turns the wheel w² situated on the axle w¹ for one revolution.
This tooth wheel w² gears into a toothed rack which carries the writing wheel ²
and is guided in the tubular slitted writing lever v. A spring tends to retain the
toothed bar always in the position shown in Fig. 2. The axle w is at its upper end
guided in a slit of the casing and is pressed with its toothed wheel ² in the teeth of
the toothed bar by a spring n. After one revolution however of the wheel the
axle to is pressed aside by lever & actuated by the cam on the axles, and thus the
wheel is brought out of gear with the toothed bar v¹. The latter is then returned

page_text: by the spring a from the position shown in Fig. 4 into the position shown in Fig. 2;
simultaneously the respective clockwork is arrested, until further interruptions of the
current take place.
The writing lever is movable on a hinge in the centre of the dial Z and is when
the current is interrupted pressed down by the two-armed armature y¹, so that the
writing wheel is pressed onto the dial, and as it is at the same time moved forward by
the clockwork, Morse signs are written on the dial corresponding to the interruptions
of the current.
The apparatus works as follows:-
When the line-current is interrupted from a controlling station corresponding to
the type-wheels arranged in the controlling boxes, the electro-maguet¹ releases its
armature ; the clockwork is thereby released by the rod y connected to the
armature y and the tooth bar driven by the clockwork, moves forward with the
writing wheel ; at the same time however also the writing lever with wheel v³ is
pressed down by the second arm of the armature y' and the wheel ² makes lines or
dots on the dial corresponding to the interruptions of the current. The running work
is not stopped until the wheel te has revolved once whereupon it is pressed aside by
lever and the tooth bar el is drawn back.
The nature of the signs will indicate the controlling station and the position of the
signs on the disc will show the time of controlling.
The clockwork for the dial may be of any desired construction, likewise the
disengaging contrivance for the axles s¹ and w¹ may have any suitable arrangement.
Since the Morse signs are somewhat complicated and when many separate stations
are controlled might confuse the inspector-in place of the Morse writing device a
type printing apparatus may be employed, which in combination with the clockwork
works similarly to the Morse writing apparatus.
This modification is shown by Figs. 9-14 and consists of a suitably constructed
clockwork, which turns the disengageable dial A within 12 (or more) hours once
round its axis. The dial A is supported by plate B Fig. 12, which is provided at a
with a recess, under which a striker comes into action. The type printing apparatus
consists of an axle b' on which is situated the type-wheel C mounted loosely on a sleeve
thereon, and also the escapement wheel c. The axle is operated through a train of
gear in the usual manner by the spring contained in the barrel D. The escapement
wheel is however restrained by the anchor d which is only moved or swung at the
moment of closing or breaking of the line current, which operates it through the
release or attraction of the armature g¹ so as to release a tooth of the escapement wheel
for each release of the armature g' that is to say to allow the escapement wheel to
revolve the amount of one tooth for each interruption of the current. The sleeve e
carrying the type wheel Cis caused to revolve with the axle and escapement wheel c
by a suitable clutch-coupling operated as herein after set forth.
At each station, is situated a suitably canstructed controlling apparatus in action of
which the current is interrupted one or more times-for instance at Station No. 1 the
current is perhaps interrupted once, at No. 2 twice, at No. 3 three times etc.
When the watchman has arrived at a controlling station and actuates the controlling
apparatus, therefore interrupts the circuit one or more times, the escapement wheel c
revolves with the axle and type wheel for the corresponding number of partitions or
types to the right, so that the type which corresponds to the controlling station stands
direct above the dial A. The latter is pressed by the striker onto the type, whereupon
the coupling is released from the sleeve e and the connection of the latter with the
axle b therefore ccases and, by aid of a spiral spring m the type wheel C is returned
to its original position, which is determined by pin n.
The dial is printed and the coupling engaged and disengaged by means of a
clock work.
The spring box E contains a spring, which transmits power by means of.
wheels oo oo to the axle p. On this axle is situated the disc
q with a recess, into
which catches the stop-lever Fig. 11.
This stop-lever is released by the lever connected with the armature g', when

page_text: the same is disengaged, when the lever is raised; its arm a releases the clock
movement. The axle then revolves once within about 1 minutes, when the same
is arrested. On the axle p is situated the cam 3 and also the eccentric t (Figs. 12,
13, 14). When the current is interrupted from a controlling station, the type wheel
brings torward the respective type.
When the eccentric t comes into action, it presses the arm of the revolveable lever /
against the dial and the latter against the type, which thereby leaves the sign on the
dial. Then the curve of the cam comes into action and disengages for a short time
the coupling The type wheel returns, driven by the spring m, to its original
position, whereupon the coupling restores the connection of the same with the axle ¹
and the clockwork is arrested by the lever falling into the slit of the disc q, until a
further control is effected from the next controlling station. The type wheel is
provided with colour by the colour roller Z or other suitable means.
As every controlling station has its particular. letter or sign the exact time at which
the watchman has been at each controlling point, can be seen from the position of the
respective letter on the dial, the time occupied by him in passing from one controlling
station to the other, being recognized by the distance of the letters from each other.
Having now particularly described and ascertained the nature of said invention and
in what manner the same is to be performed, I declare that what I claim is :-
In watchman-controlling-apparatus
1. The recording apparatus consisting of a dial moved by a clock-work and on
which Morse signs are produced by a writing lever v provided with toothed bar and
writing wheel, which writing lever is operated by the armature of an electro-magnet,
its writing wheel being driven over the dial by a clock-work and drawn back by a
spring for the purpose of indicating the operation of the control and the place and
time of such operation substantially as set forth.
2. The recording apparatus consisting of a clock moving a dial, over which is
arranged a type wheel of the type printing apparatus, adapted to be turned for a
corresponding number of types, when the control is effected with lever or other
means for causing the respective type to be printed on the dial substantially as and for
the purpose set forth.
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