Abstract: Apparatus for supporting a telephone handset on the user's shoulder while leaving the hands free for other tasks in which a new and improved adjustment mechanism is provided. The handset support includes a shoulder rest; a support member attached to the shoulder rest, said support member having a first multiplicity of raised teeth arranged in a circular pattern about a central opening; a cradle member for supporting the telephone handset, said cradle member having a second multiplicity of raised teeth arranged in a circular pattern about a central protuberance having an axial opening therein, whereby said second multiplicity of teeth may complementarily engage with said first multiplicity of teeth and said central protuberance may complementarily engage with the central opening; and attachment means for passing through said central opening and engaging the axial opening in said the central protuberance.

Abstract: This invention relates to a compact electro-acoustic transducer (10) to be used in the ear hole which prevents oppressive and inharmonious sensations to the auricle (A) when used and also prevents the deterioration of the reproduced sound quality. To do this, according to this invention, the electro-acoustic transducer (10) is formed of an outer casing (30) which houses therein an electro-acoustic transducer element (20), is shaped in size to be engagable with the concave portion of the auricle (A) and supported at least two points by one part of the auricle (A) when engaged with the concave portion of the auricle (A) and of a cord supporting member (50) extended from the outer casing (30) to be contact with the outer surface of the auricle (A) at a lower position than the respective supportion positions of the outer casing (30).

Abstract: Telephone sterilizer consisting of an electric ozone gas producing unit, consisting of a vacuum tube in which interior a electrode is fed with high current. The vacuum tube is surrounded by a negative charged mesh cylinder. Therefore, high current inside the vacuum tube will penetrate the vacuum tube in the form of electric sparks to make contact with the grounded mesh cylinder. The plurality of electric sparks surrounding the outer circumference of the vacuum tube will fuse oxygen out of the ambient to distrubute ozone gas (O.sub.3) to the ear or mouthpiece of telephone handset to destroy bacteria.

Abstract: A modular jack for a telephone, particularly for use in a handset, has a minimal height or profile by using a circuit board, on which the jack is mounted, as one of the walls defining the aperture into which a modular plug is inserted. The overall height of the jack is reduced by the thickness of the circuit board. The jack and board assembly has the smallest height dimension possible.

Abstract: An improved ceiling mountable acoustic transducer mountable in a ceiling tile without the cutting of a hole. A pair of elongated members which pierce the ceiling tile are attached to a housing which holds the acoustic transducer. The housing is held in contact with the surface of the ceiling tile by a pair of spring clips which engage the elongated members. The electrical connection of the transducer to an acoustical electrical signal source is made through the elongated members to the acoustic transducer by attachment of leads to the clips.

Abstract: A hearing aid, in particular a behind-the-ear hearing aid, comprising a first unit (1) that includes an amplifier (4), a hook (3) formed with a duct (16) and a space (8). A second unit (2) includes an electro-acoustic transducer (12). The second unit is intended to be worn in the ear. A tubular element (15) for the mechanical connection of the two units accommodates connecting means (14) for electrically coupling the transducer (12) to the amplifier (4). The element (15) is axially slidable inside the duct. This enables the hearing aid to be adapted to the size of the ear of the person wearing the hearing aid. The connecting means (14) is long enough so that even for a big ear, the electrical connection is still intact or can be made. When the hearing aid is adapted to a smaller ear, the connecting means (14) is then too long but the space (8) takes up the excess length of the connecting means.

Abstract: The present invention provides an automatic lock for use on a telephone, and comprising a main body for securing to the phone, a slide member slideably mounted in the main body and a spring pressuring the slide member to automatically slide to a locking position over the post of the phone when depressed by the telephone handle to the down position. The slide member is manually slideable against the pressure of the spring away from the locking position to allow upward popping of the post with the slide member being reset to return to the locking position with further depressing of the post.

Abstract: A boom mounted microphone includes a boom mounted plug and connectors for connection to and supporting a microphone disposed in a two part housing that is divided into a socket for receiving said plug for locking physical support as well as conductive electrical connection, and a plurality of consecutive, adjacently disposed compartments, including at least a pair disposed parallel to the longitudinal axis, opening into the socket and containing conductive sockets for conductively receiving the connectors on the plug, a compartment for receiving a signal processing board and a compartment for mounting a microphone, the side walls, socket and compartments formed by complementary disposed walls of each housing and includes screw threaded fastening means extending through one wall of one part of the housing into the conductive sockets and in engagement with the connectors on the plug.

Abstract: An electro-dynamic transducer of the isophase or ribbon type includes a vibratile diaphragm (7) arranged in the air gap of the transducer magnet system and having a current conductor (9) arranged thereon. An additional layer (23, 24) of material is arranged on at least one part of the diaphragm, e.g. in a space (11) between the pole plates. In order to extend the operating frequency range of the transducer, the additional layer is divided into sections (25, 26) with the area of each section being at least an order of mangitude smaller than the area of the one part of the diaphragm. These sections are distributed more or less uniformly over the one part of the diaphragm. It is possible to reduce distortion and increase the sensitivity of the transducer.

Abstract: A hearing aid apparatus has a housing containing components such as a microphone, an amplifier and an earphone,and to which a terminal having contacts for connection to a signal line is applied. The terminal also has contacts for derivation of signals from the microphone so that a conventionally operating hearing aid is achieved which also contains an audio output in addition to an audio input. The hearing aid apparatus is thus particularly suitable for use as a talk/listen set in aural training systems.

Abstract: A miniaturized headset for two-way voice communication is supported and positioned by the notch in the concha portion of a wearer's ear. The headset is reversible and may be worn on either the left or right ear. The earpiece includes sound output ports located therein to provide for alignment of a port with the auditory canal of either of the headset wearer's ears. The earpiece is disposed within the concha of the wearer's ear and outside the auditory canal.

Abstract: A dynamic speaker device having a small-sized vibrating plate for reproducing a high frequency sound is further provided with an additional coil in the vicinity of the magnet assembly of the speaker. The additional coil is mounted on a comparatively heavy vibrating element which is supported by a spring plate. The additional coil and the vibrating element vibrates to reproduce lower frequency sound and vibration in response to audio signal supplied to the additional coil.

Abstract: A cord receiving and retaining groove in the back surface or web of a telephone set base has one or more cord retaining formations spaced along the groove. Two spaced parallel walls extend inward from the groove, away from the back surface. A cantilever member is formed in each wall, the cantilever member integral with the wall at its fixed end and extending to a free end in the groove. The cantilever members are in opposition. A projection is formed on the free end of each cantilever member, the projections extending towards each other. A cord is pushed into the groove and snaps past the projections on the free ends of the cantilever members. The cantilever members are given sufficient lever length for ready deflection by the walls extending from the groove. The walls permit flexing of the cantilever members over a longer length than if the cantilever members were formed only in the walls of the groove.

Abstract: A directional microphone arrangement has a number of discrete microphones each having an electrical output and elements for deriving first and second electrical signals which are 180.degree. out of phase with respect to each other from the outputs of the microphones. A third signal is also derived through differentiation from one of the microphone outputs which is 90.degree. out of phase with respect to one of the first or second signals. All of the first, second and third signals are added in a summing unit, the output of the summing unit forming the output for the arrangement.

Abstract: A hearing aid device for processing sound, which comprises a device for transducing sound to an electrical signal, a device for processing the electrical signal, a device for powering and regulating the processing device, and a device for transducing the processed electrical signal into sound, all these devices being enclosed in a case adapted for being inserted in an ear canal, an elastic layer defining a chamber on the outside of the case, the chamber containing a cold-curing composition consisting of at least two components, at least one partitioning wall within the chamber for separating the components from one another, the partitioning wall being adapted to be ruptured by being subjected to a pressure effect, the components being adapted, when being combined upon rupture of said wall, to provide a composition which expands during an initial curing period, and then sets rigidly with a substantial form stability.

Abstract: A telephone handset comprises elongated complementary upper and lower housing members that mate at their perimeters to form a hollow handset housing. The lower housing member includes spaced transducer mounting positions, each of which accommodates both an individual transducer and a transducer mounting member for holding the transducer in the transducer mounting position. Each transducer mounting member is secured to the lower housing member and an upper surface of each enclosure inlcudes a recess for accommodating a bonding material. In addition, the upper housing member includes elements that extend into the recesses of the transducer mounting members when the upper housing member is mated to the lower housing member. The bonding material in the recesses serves to secure the two housing members together.

Abstract: A substantially rectangular modular jack connecting block suitable for use in the connection or mounting of terminal equipment using modular plugs, i.e., wall phones and the like, and including separable interior portions and add-on portions which transform the modular jack connecting block to other types of connecting devices suitable for a variety of other connecting applications is presented.

Abstract: A miniature hearing aid comprises an input transducer (18), amplifier (19) and control elements (8, 10) as well as a current source and output transducer (20), where at least a part of the amplifier (19) is applied on mounting surfaces hinged together and lying on mounting plates (46 to 49) and the articulated connections (60 to 63) have a flexible support provided with electrically conducting tracks (50 to 52, 57). The desideratum is, in view of the small space in miniature hearing aids, to obtain a large area for the application of the structural components or elements. This is achieved according to the invention in that the amplifier (19) is designed as a multi-layered system which comprises at least three layers (40 to 42), of which the two outer ones (42, 43) carry the physical or structural elements (53, 54, 54.

Abstract: A telephone unit is adapted for mounting in either a vertical or a horizontal mode. In the vertical mode, the telephone cradle includes an upwardly extending hook member which projects into the space occupied by the handset to engage a downwardly facing recess in the handset to support the handset in a fixed position. In the horizontal mode, the hook member is retracted from the space occupied by the hook member, and a movable wall is positioned to bias the handset into the same fixed position relative to the cradle.

Abstract: An electrostatic acoustic converter having two parallel, insulating perforated plates, the inner surfaces of which are covered by electrically resistive layers, each having a signal terminal for connection to a source of sound frequency signals. Between the plates there is fixed a flexible plastic diaphragm isolated from the layers and having a terminal for connection to a source of polarizing voltage.