An Improved Operating Device for Electric Bells and House Telegraph Signals.
Year: 1899

page_text: Date of Application, 10th Aug., 1899-Accepted, 7th Oct., 1899
COMPLETE SPECIFICATION.
An Improved Operating Device for Electric Bells and House
Telegraph Signals.
I, FERDINAND SCHUCHHARDT, of No. 9, Rungestrasse, Berlin, in the Empire
of Germany, Works Proprietor, 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 an operating device for electric bells and house
telegraph signals, and has for its object an operating device which takes the
place of a push button and a battery, so that these formerly distinct arrangements
are now combined in a single apparatus and the defects of batteries formerly
necessary (i.e. the formerly unavoidable interruptions of working) are entirely
avoided. The invention is shown in Figures 1 and of the accompanying draw-
ings.
A horse shoe magnet is provided at its poles with a projection or several
projections for attachment and at the open sides with a frame d for mounting
an armature i. As the ordinary projections or pole pieces are not employed,
the armature is directly mounted between the recessed arms of the magnet. A
spindle w is inserted through the magnet and is mounted in the frame d, and
if desired also in a casing a enclosing the device. The spindle w and the arma-
ture are preferably connected by means of a train of gearing on m l. The
spindle w has at the ends suitably shaped knobs k k¹, but the arrangement may
be adapted, of providing the spindle c with only one such knob k or k¹, or so
that only one projects on one side of the casing a to such an extent that a handle
for turning it may be suitably attached or fixed thereon. This device which is
enclosed in a suitably shaped casing may be mounted either directly by the casing,
or by the use of a plate a¹, on a wall or door t, or the like.
By means of the device shown in Figures 1 and 2 and herein before described
for operating the apparatus, and consisting of the combination on a revoluble
shaft of a knob mounted thereon, with a suitable train of gearing, it is rendered
possible to produce a practicable current for house telegraph signals or electric
bells, which latter have only a very slight resistance in their coils so that even
a quarter revolution of one of the knobs is sufficient, so that the push button
and battery formerly necessary for the said object is replaced by a turning knob
and the interruptions of working connected with electric batteries are by this
means entirely avoided. The transmission of the current from the inductor may
take place in any ordinary manner by means of a rubbing spring or contact
resting against the spindle of the armature.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
An onerating device for electric bells and house telegraph signals for replacing

page_text: the press button and battery formerly necessary, characterised by the combination
of a revoluble knob suitably connected with a train of gearing and a suitable
inductor, in such a way that by means of a slight rotation of one knob, and the
thereby produced rapid rotation of an armature of the ordinary construction, a
current capable of being used for electric bells and like signalling apparatuses
is produced, substantially as herein before set forth.
Dated this 9th day of Amoms 1899
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.