Improvements in Ear Appliances to Facilitate Hearing by the Deaf or Partially Deaf.
Year: 1897

page_text: Date of Application, 20th Oct., 1897-Accepted, 11th Dec., 1897
COMPLETE SPECIFICATION.
Improvements in Ear Appliances to Facilitate Hearing by the Deaf
or Partially Deaf.
t
We, ANTON NON SUCHORZYNSKI of 7 Lohestrasse, Breslau in the German
Empire, Insurance Inspector and MAX KOHL of la Monhauptstrasse, Breslau,
Merchant, 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 instruments or appliances which may be inserted
within the car for the purpose of enabling the deaf or partially deaf to hear or to
hear more distinctly. Analogous appliances, as for example of the Nicholson type
have already been used for the same purposes but their use is accompanied with dis-
advantages which it is the object of these improvements to avoid.
An instrument or appliance constructed to embody these improvements consists
in effect, of a telephonic transmitter and receiver in combination, and it is intro-
duced into the ear passage so far that the receiver end comes into contact with
the tympanum or "drum," or, should the drum be missing, into contact with
the small ear bones, as shewn in figure 1 of the accompanying drawings. The
appliance is separately shewn in longitudinal section on an enlarged scale by
Figure 2, and in cross section along the line -, by Figure 3 of the accom-
panying drawings to which reference will hereinafter be made.
A hollow body a is constructed of a sufficiently elastic material such as vul-
canised indiarubber and with a shape in cross section and dimensions corre-
sponding with those of the ear passage e in which the appliance is to be used.
The inner face of the arched end plate is coated with iron filings which thus
form a telephonic diaphragm. At the back of the hollow body a there is arranged
a small permanent magnet b, which may be substituted by an equivalent electro-
magnet. At the back of the magnet there is arranged a second hollow body also
having an arched cover or plate e coated on the inside with iron filings and pointed
as shown at e². This body like the first, is shaped to fit the position to be occupied
by it as indicated by the drawings.
The ends of the intermediate magnet approach the iron coated diaphragms a¹,
and it follows from the known laws that sound waves impinging upon the front
diaphragm will create variations in the magnetic strength producing correspond-
ing mechanical vibrations in the back diaphragm which are communicated to the
ear bone d d directly or through the tympanum f as the case may be. The
magnetic effect may be increased by winding upon the middle part of the per-
manent magnet, a coil of fine wire as indicated.
When the apparatus has to be used by persons who are very deaf, the transmitting
end of the appliance may be microphonic, the microphonic contacts or electrodes
and the magnet coil forming part of a small battery circuit, and when the utmost
effect is desired, the permanent magnet may be substituted by a soft iron core.
In the case of ladies using the appliance, the small battery may be secreted in
the hair or be combined with a hair comb.

page_text: Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed We declare that what
we claim is:
:―
1. An instrument or appliance enabling the deaf or partially deaf to hear or
to hear more distinctly, and consisting in effect of a telephonic transmitter and
receiver to be introduced into the auditory canal with the transmitting portion
outwards and the receiving portion in contact with the typanum or ear bones, con-
structed and arranged substantially as herein before described with reference.to
the accompanying drawings.
2. An instrument or appliance enabling the deaf or partially deaf to hear or
to hear more distinctly, constructed and arranged substantially as hereinbefore
described with reference to the accompanying drawings.
Dated this 18th Day of October A.D.
W. E. HEYS & SON,
Agents for the Applicants.
W. E. HEYS & SON,
Agents for the Applicants.