Improvements in Checking or Controlling Devices for Workmen and the like.
Year: 1899

page_text: Date of Application, 19th Sept., 1899-Accepted, 21st Oct., 1899
COMPLETE SPECIFICATION.
Improvements in Checking or Controlling Devices for Workmen
and the like.
We, FRANZ RYssoк, of Michalowitz, and HERMANN VENTH, of Siemianowitz,
both near Laurahütte, Upper Silesia, in the German Empire, Foremen Miners,
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 relates to checking or controlling devices such as may be
employed for controlling the movements of workmen, or the output of coal
in a coal mine, or the like. The improved device consists essentially of a box
or casing into which a number plate may be placed. This plate can only be
released and removed by those duly authorised. No mechanism is employed on
the outside of the box, and the plate is released by the action of a magnet upon
a suitable armature.
In the accompanying drawings Figure 1 shows the improved apparatus in plan.
Figure 2 illustrates it in side view.
Figure 3 shows it in vertical section.
Figure 4 is a section taken at right angles to that shown in Figure 3.
b
The box or casing a is formed from some non-magnetic material, such, for
example, as bronze. The number plate 6 may be composed of the same material
and is inserted into the box by being slided in as shown. When the plate is in
place the number or the like which it bears is displayed through an opening d in
the front wall of the box. Within the box is mounted a flat spring e the end of
which is formed as shown at f so as to spring into engagement with a suitable
opening g formed in the plate b. The plate is thus normally securely held in
the box.
The spring e or its head for both of them if desired is or are formed of iron
or steel so as to be acted upon by a magnet. If a magnet be held close to the
casing near to the spring e the head f is withdrawn from engagement with the
plate 6 and the latter is free to be withdrawn by hand.
In a modification the casing may have inserted in it one or more plugs of iron
or the like h, h, which are permanently fixed near to the spring, and serve to
increase the action of the magnet when the latter is placed near to or upon them.
k is a spring device which may be employed. It is compressed by the insertion
of the plate band therefore expels it or assists in its expulsion after the magnetic
release has been effected.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that
what we claim is):-
1. A checking or controlling device the lock of which is released by means
of a magnet, constructed and arranged substantially as herein before described
and as illustrated by the accompanying drawings.

page_text: 2. In a checking or controlling device the lock of which is released by a
magnet, the combination with the non-magnetic casing of a plug or plugs or
magnetic material, constructed and arranged substantially as herein before de-
scribed and as illustrated by the accompanying drawings.
3. In a checking or controlling apparatus the lock of which is released by a
magnet, the combination with the casing of a spring which is compressed upon
the insertion of the number plate, substantially as herein before described and
as illustrated by the accompanying drawings.
4. A checking or controlling device, constructed arranged and operated sub-
stantially as herein before described and as illustrated by the accompanying
drawings.
Dated this 18th day of September A.D. 1899.
W. E. HEYS & SON,
Agents for the Applicants.