US2495546A - Hearing aid chassis - Google Patents

Hearing aid chassis Download PDF

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Publication number
US2495546A
US2495546A US787714A US78771447A US2495546A US 2495546 A US2495546 A US 2495546A US 787714 A US787714 A US 787714A US 78771447 A US78771447 A US 78771447A US 2495546 A US2495546 A US 2495546A
Authority
US
United States
Prior art keywords
elements
amplifier
chassis
frame
hearing aid
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 - Lifetime
Application number
US787714A
Other languages
English (en)
Inventor
Posen Sam
Harvey E Hanson
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.)
Beltone Hearing Aid Co
Original Assignee
Beltone Hearing Aid Co
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 to BE485721D priority Critical patent/BE485721A/xx
Priority to NL71916D priority patent/NL71916C/xx
Priority to GB650867D priority patent/GB650867A/en
Application filed by Beltone Hearing Aid Co filed Critical Beltone Hearing Aid Co
Priority to US787714A priority patent/US2495546A/en
Priority to FR974291D priority patent/FR974291A/fr
Priority to DEB435A priority patent/DE804444C/de
Application granted granted Critical
Publication of US2495546A publication Critical patent/US2495546A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/02—Arrangements of circuit components or wiring on supporting structure
    • H05K7/04—Arrangements of circuit components or wiring on supporting structure on conductive chassis
    • 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
    • H04R25/04—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception comprising pocket amplifiers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0271—Arrangements for reducing stress or warp in rigid printed circuit boards, e.g. caused by loads, vibrations or differences in thermal expansion
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/20—Details of printed circuits not provided for in H05K2201/01 - H05K2201/10
    • H05K2201/2009—Reinforced areas, e.g. for a specific part of a flexible printed circuit
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S439/00—Electrical connectors
    • Y10S439/909—Medical use or attached to human body

Definitions

  • This invention relates to wearable electronic hearing aids and more particularly to the insulating chassis ordinarily used in such hearing aids for carrying the various elements of the electronic amplifier of the hearing aid.
  • wearable electronic hearing aids have been developed to the point that, apart from the earphone or receiver, the entire instrument, i. e. the microphone, the electron tube amplifier and the supply batteries therefor, are housed in a single casing which is small enough to be worn in an ordinary garment pocket.
  • the present invention has for one of its objects the provision of an insulating chassis which permits a further reduction of the size of the hearing aid.
  • a further object of the invention is to provide an insulating chassis for carrying the elements of the electron tube amplifier of a wearable hearing aid which is composed of two parts, one part being made of material which is of relatively high tensile, compressive and fiexural strength and the other part of a rigid heat resistant material;
  • a still further object of the invention is to allocate the elements of the amplifier, which expression includes also the fastening elements, to the two parts of the composite insulating chassis in such manner that the part of relatively high mechanical strength carries those elements which are apt to impart. substantial mechanical stresses to the chassis, such as fastening screws, sockets for the electron tube, contact springs for the batteries, etc., Whereas the rigid heat resistant part carries other of'the amplifier elements which may include layer resistors and/or ceramic condensers.
  • Another object of the invention is to provide an insulating chassis composed of a frame surrounding an opening and at least one ceramic plate placed in said opening, utilizing said frame for carrying some of the amplifier elements and the ceramic plate for carrying other amplifier elements.
  • object of the invention is to provide an insulating chassis of the kind just mentioned wherein the ceramic plate is anchored to the surrounding frame by means of wire connectors which extend between contact points, on the ceramic plate and contact points on the frame.
  • FIG. 1 shows a back view of a wearable electronic hearing aid with the back cover removed;
  • Fig. 2 shows in elevation and at a larger scale the composite chassis of the hearing aid shown in Fig. 1;
  • Fig. 3 is a section on the line 3-3 of Fig. 2;
  • Fig. 4 shows the outer frame of the composite chassis without any of the amplifier elements attached.
  • l0 denotes the casing of a wearable electronic hearing aid which is divided, into two compartments II and IZ'by-means of a partition wall, 13.
  • the lower compartment H accommodates two batteries 14 and i5, I 4 being in this case a rod shaped B-battery held between two contact strips and 8! and 15 a tablet shaped A-battery whose onev pole makes. contact with a contact spring 82.
  • the upper compartment [2 houses the electron tube amplifier and is divided lengthwise by means of an insulating chassis or panel, generally indicated at it, upon which the various amplifier elements are mounted.
  • Electron tubes l1, l8 and I9 are placed at the back side of the chassis 16 whereas the usual microphone (not shown) is at the front side of the chassis.
  • - denotes a choke coil or transformer and 22 an electrolytic condenser.
  • 23, 24 and 26 are plug-in sockets for the electron tubes: H, is and 19, respectively. The axes of these sockets extend perpendicularly to the plane of the chassis 16.
  • the tubes :1, l8 and 19 have leading-in wires which are bent down at a right angle in the manner described in the co-pending application Serial No. 571,218 of Sam Posen -(Patent No. 2,431,198), so that these tubes can be plugged easily into the sockets 23, 24, 26 with the main axis of the bulbs of these tubes extendin parallel to the plane of the chassis I6.
  • the chassis 16 is shown as consisting of two main parts, a frame 21 and an insert plate 28.
  • the frame 21 is made of a slightly flexible material, such as from a sheet of synthetic plastic having th required electrical andmechanical characteristics. Laminated, board coated with a synthetic resin of the phenol formaldehyde type, which material has high tensile, compressive and flexural strength, has been found to bewell suited for the frame 21.
  • the plate 28, which fits into a rectangular opening 29 of the frame 21, is mad of a nonfiexible heat resistant material, such as a ceramic material, preferably steatite.
  • the ceramic plate 28 is used as a support for a so-called printed circuit, known in the art of electronic devices, which consists of elements sprayed or painted onto the ceramic plate and of elements which are so fiat in shape that, when placed upon the ceramic plate, they increase the thickness of the ceramic plate only very slightly.
  • a so-called printed circuit known in the art of electronic devices, which consists of elements sprayed or painted onto the ceramic plate and of elements which are so fiat in shape that, when placed upon the ceramic plate, they increase the thickness of the ceramic plate only very slightly.
  • Fig. 2 there are shown as sprayed-on or otherwise deposited elements resistors 30 to 34 and connectors 31 to 42, wliereasas elements attached as flat bodies to the ceramic plate 28 there are shown two so-called ceramic condensers 35 and 36 consisting of a very thin ceramic plate as a dielectric and a silver layer applied to each side of the ceramic dielectric.
  • the frame 2'! which surrounds the ceramic plate 28 is provided with three rectangular holes 23', 24' and 26' adapted to receive the electron tube sockets 23, 2 and 26, respectively.
  • Another rectangular hole 56 is provided to receive a socket for the receiver cord (not shown).
  • Circular holes 51, 58 and 59 permit the passag of fastening screws of which two are shown in Fig. 1 at 60 and SI.
  • Other holes such as 62 and 63 are pro vided to accommodate metallic eyelets to which wire connectors, such as the wire connectors 54 and 55, may be secured, e. g. by soldering.
  • the insulating chassis I6 By constructing the insulating chassis I6 as the combination of a slightly flexible part of great mechanical strength and a part which is absclutely inflexible and heat resistant, even though relatively brittle, it is possible to assign to each of these two parts making up the composite chassis those tasks for which each is best suited. Even the slightest dislocation of the particles of a deposited or layer resistor due to flexing of the base of such resistor would manifest itself in the quality of reception of a hearing aid.
  • the ceramic plate serving as the dielectric in a ceramic condenser is so thin and brittle that it would break even under a small bending force.
  • the ceramic condenser if such a ceramic condenser is to be secured against a fiat support so as to be in structural contact therewith, this support must be absolutely rigid.
  • the ceramic plate 28 satisfies this requirement of absolute rigidity which a support made of a resin-impregnated laminated board would not do.
  • the layer resistors, such as 30 to 34 have in certain production methods to be heated to temperatures far above the decomposition temperature of any plastic resin. A ceramic support such as the stea-tite plate 28 will not be adversely affected at all by the high temperature necessary for firing the layer or deposit resistors.
  • a relatively thin steatite plate could not stand up well under such mechanical strains as exerted by fastening screws pressing against the chassis, or those stresses which will occur when plugging in or pulling out the electron tubes ll, 18 and I9 or the receiver cord, or when exchanging a battery H or l5.
  • the frame 21 made of such slightly flexible material as laminated board coated with a synthetic resin of the phenol formaldehyde type easily withstands such mechanical strains as have just been mentioned.
  • an insulating support for carrying the elements of the electron tube amplifier composed of a frame of a material of high tensile, compressive and fiexural strength surrounding an opening and at least one plate placed in said opening consisting of a non-flexible, heat resistant material, some of the elements of said amplifier being carried by said frame an others by said plate.
  • an insulating chassis for carrying the elements of the electron tube amplifier comprising a frame made of a laminated plastic sheet surrounding an opening and at least one ceramic plate placed in said opening, some of said elements of said amplifier being carried by said frame and some by said ceramic plate.
  • an insulating support for carrying the elements of the electron tube amplifier comprising a frame of a material of high tensile, compressive, and flexural strength surrounding an opening and at least one ceramic plate placed in said opening, some of said elements of said amplifier, including such that are apt to impart substantial mechanical stresses to the support being mounted on or in said frame, and other of said amplifier elements, including at least one of the two types of elements of printed circuits: ceramic condensers and layer resistors, being supported by said ceramic plate.
  • an insulating support for carrying the elements of the electron tube amplifier comprising a frame of a material of high tensile, compressive and fiexural strength surrounding an opening and at least one ceramic plate placed in said opening, some of said elements of said amplifier, including such that are apt to impart substantialmechanical stresses to the support, being mounted on or in said frame and other of said amplifier elements, including at least one of the two types of elements of printed circuits: ceramic condensers and layer resistors, being supported by said ceramic plate, said frame and said ceramic plate beinggjoin'ed in such a manner that mechanical stresses imparted to said frame will not be transmitted to any appreciable extent to said ceramic plate.
  • a wearable electronic hearing aid comprising an electron tube amplifier having sockets for plug-in tubes, an insulating support for carrying the elements of the electron tube amplifier, comprising a frame of a material of high tensile, compressive and flexural strength surrounding an opening for supporting those elements of said amplifier which are apt to impart substantial mechanical stresses to the support, including said tube sockets, and at least one ceramic plate placed in said opening for supporting other elements of said amplifier, including at least one of the two types of elements of printed circuits: ceramic condensersand layer resistors.
  • an insulating support for carrying the elements of the electron tube amplifier comprising a frame of a material of high tensile, compressive and flexural strength surrounding an opening and at least one ceramic plate placed in said opening, some of said elements of said amplifier, including such that are apt to impart substantial mechanical stresses to the support being mounted on said frame, and other of said amplifier elements, including at least one of the two types of elements of printed circuits: ceramic condensers and layer resistors, being supported by said ceramic plate, and Wire connectors extending between, and soldered to, contact points on said ceramic plate and contact points on said frame.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Mounting Of Printed Circuit Boards And The Like (AREA)
  • Casings For Electric Apparatus (AREA)
  • Connection Of Batteries Or Terminals (AREA)
US787714A 1947-11-24 1947-11-24 Hearing aid chassis Expired - Lifetime US2495546A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE485721D BE485721A (de) 1947-11-24
NL71916D NL71916C (de) 1947-11-24
GB650867D GB650867A (de) 1947-11-24
US787714A US2495546A (en) 1947-11-24 1947-11-24 Hearing aid chassis
FR974291D FR974291A (fr) 1947-11-24 1948-10-25 Châssis d'amplificateur à tubes électroniques
DEB435A DE804444C (de) 1947-11-24 1949-11-01 Chassis fuer Elektronenroehrenverstaerker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US787714A US2495546A (en) 1947-11-24 1947-11-24 Hearing aid chassis

Publications (1)

Publication Number Publication Date
US2495546A true US2495546A (en) 1950-01-24

Family

ID=25142338

Family Applications (1)

Application Number Title Priority Date Filing Date
US787714A Expired - Lifetime US2495546A (en) 1947-11-24 1947-11-24 Hearing aid chassis

Country Status (6)

Country Link
US (1) US2495546A (de)
BE (1) BE485721A (de)
DE (1) DE804444C (de)
FR (1) FR974291A (de)
GB (1) GB650867A (de)
NL (1) NL71916C (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2650267A (en) * 1949-08-26 1953-08-25 Maico Company Inc Hearing aid construction
US2692305A (en) * 1950-06-26 1954-10-19 Microtone Company Inc Hearing and unit
US2761018A (en) * 1949-03-02 1956-08-28 Paravox Inc Hearing aid having a molded chassis
US2899608A (en) * 1959-08-11 Multiple element printed circuit component
US2902630A (en) * 1956-05-03 1959-09-01 Jr Vincent M Heazel Hermetically sealed package for electronic component
US2959645A (en) * 1956-05-22 1960-11-08 Ladd John Hearing aid
US3011379A (en) * 1957-02-05 1961-12-05 Baldwin Piano Co Electronic musical instrument with photoelectric switching
US3710194A (en) * 1971-02-11 1973-01-09 Westinghouse Electric Corp Concealed adjustable element for electronic circuit cards
US4405971A (en) * 1979-12-10 1983-09-20 Sony Corporation Electrical circuit apparatus
US4628527A (en) * 1982-12-06 1986-12-09 Siemens Aktiengesellschaft Mini hearing aid

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1688976A (en) * 1924-06-21 1928-10-23 Western Electric Co Audiphone
US1804676A (en) * 1925-03-05 1931-05-12 Columbia Phono Graph Company I Radio apparatus
US2441960A (en) * 1943-02-02 1948-05-25 Eisler Paul Manufacture of electric circuit components
US2444302A (en) * 1943-03-16 1948-06-29 E A Myers & Sons Hearing aid
US2453192A (en) * 1944-09-08 1948-11-09 Bell Telephone Labor Inc Moisture impervious vent

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1688976A (en) * 1924-06-21 1928-10-23 Western Electric Co Audiphone
US1804676A (en) * 1925-03-05 1931-05-12 Columbia Phono Graph Company I Radio apparatus
US2441960A (en) * 1943-02-02 1948-05-25 Eisler Paul Manufacture of electric circuit components
US2444302A (en) * 1943-03-16 1948-06-29 E A Myers & Sons Hearing aid
US2453192A (en) * 1944-09-08 1948-11-09 Bell Telephone Labor Inc Moisture impervious vent

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899608A (en) * 1959-08-11 Multiple element printed circuit component
US2761018A (en) * 1949-03-02 1956-08-28 Paravox Inc Hearing aid having a molded chassis
US2650267A (en) * 1949-08-26 1953-08-25 Maico Company Inc Hearing aid construction
US2692305A (en) * 1950-06-26 1954-10-19 Microtone Company Inc Hearing and unit
US2902630A (en) * 1956-05-03 1959-09-01 Jr Vincent M Heazel Hermetically sealed package for electronic component
US2959645A (en) * 1956-05-22 1960-11-08 Ladd John Hearing aid
US3011379A (en) * 1957-02-05 1961-12-05 Baldwin Piano Co Electronic musical instrument with photoelectric switching
US3710194A (en) * 1971-02-11 1973-01-09 Westinghouse Electric Corp Concealed adjustable element for electronic circuit cards
US4405971A (en) * 1979-12-10 1983-09-20 Sony Corporation Electrical circuit apparatus
US4628527A (en) * 1982-12-06 1986-12-09 Siemens Aktiengesellschaft Mini hearing aid

Also Published As

Publication number Publication date
FR974291A (fr) 1951-02-20
NL71916C (de)
DE804444C (de) 1951-04-23
BE485721A (de)
GB650867A (de)

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