GB166641A - Telephone apparatus for deaf persons - Google Patents

Telephone apparatus for deaf persons

Info

Publication number
GB166641A
GB166641A GB964820A GB964820A GB166641A GB 166641 A GB166641 A GB 166641A GB 964820 A GB964820 A GB 964820A GB 964820 A GB964820 A GB 964820A GB 166641 A GB166641 A GB 166641A
Authority
GB
United Kingdom
Prior art keywords
telephone apparatus
deaf persons
deaf
persons
jonason
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB964820A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US362174A external-priority patent/US1436264A/en
Application filed by Individual filed Critical Individual
Priority to GB964820A priority Critical patent/GB166641A/en
Publication of GB166641A publication Critical patent/GB166641A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
    • H04R25/604—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of acoustic or vibrational transducers
    • H04R25/606—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of acoustic or vibrational transducers acting directly on the eardrum, the ossicles or the skull, e.g. mastoid, tooth, maxillary or mandibular bone, or mechanically stimulating the cochlea, e.g. at the oval window

Abstract

166,641. Jonason, G. L. April 6, 1920. Variable resistances.-A rheostat for a telephone set consists of a flat spiral, elongated or other coil 4 of wire, ribbon, or the like, and a rotatable radius arm 29 furnished with a slide travelling on the coils.
GB964820A 1920-02-28 1920-04-06 Telephone apparatus for deaf persons Expired GB166641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB964820A GB166641A (en) 1920-02-28 1920-04-06 Telephone apparatus for deaf persons

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US362174A US1436264A (en) 1920-02-28 1920-02-28 Auricular apparatus
GB964820A GB166641A (en) 1920-02-28 1920-04-06 Telephone apparatus for deaf persons

Publications (1)

Publication Number Publication Date
GB166641A true GB166641A (en) 1921-07-06

Family

ID=26243071

Family Applications (1)

Application Number Title Priority Date Filing Date
GB964820A Expired GB166641A (en) 1920-02-28 1920-04-06 Telephone apparatus for deaf persons

Country Status (1)

Country Link
GB (1) GB166641A (en)

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