Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 4837839 | Compact speaker assembly with improved low frequency response A speaker transducer assembly is disclosed which includes first and second speaker diaphragms supported on a frame in over and under juxtaposition. Each of the speaker diaphragms has a central opening defining an inner periphery which is attached to a voi... | 06/06/1989 |
| 4811816 | Symmetric double phonic diaphragm volume-enhancing device A device having two sets of oppositely facing corresponding resonance cavities; i.e., an upper and a lower resonance cavity. Each of the resonance cavities include a piezo-electric type diaphragm consisting of a vibration diaphragm and a start-up plate. E... | 03/14/1989 |
| 4768615 | Acoustic transducer system The acoustic transducer system includes an electroacoustic transducer and a flexural oscillator plate which is coupled to the electroacoustic transducer. The flexural oscillator plate is so constructed that at the system operating frequency it is stimulat... | 09/06/1988 |
| 4761817 | Diaphragm structure for a transducer A diaphragm for an acoustical transducer comprises a support and a separate cover for the support. The support is constructed from a relatively more rigid material having the desired physical characteristics of mass and stiffness for the transducer. The c... | 08/02/1988 |
| 4709392 | Dome speaker with a diaphragm having at least one elongated cut-out portion A dome speaker comprising a dome-shaped diaphragm formed of a highly rigid material such as titanium or a titanium alloy, and having at least one elongated cut-out portion which varies the rigidity of the diaphragm and prevents a dip in the anti-resonance... | 11/24/1987 |
| 4582163 | Electro-acoustic transducer with high air permeable diaphragm An electro-acoustic transducer comprising a diaphragm (1) and means for shifting the high-frequency roll-off of the frequency-response characteristic of the transducer towards lower frequencies. This is accomplished by making the diaphragm (1) permeable t... | 04/15/1986 |
| 4532383 | Electroacoustic transducer having a variable thickness diaphragm To provide for good wide range frequency response utilizing only a single lightweight diaphragm in a peripherally-driven electroacoustic transducer, the diaphragm is made with a variable thickness. The region along the peripheral edge of the diaphragm is ... | 07/30/1985 |
| 4529059 | Vibrating diaphragm type audible device with acoustically improved grille and method An audible device of the vibrating diaphragm type which has improved acoustical performance by reducing the open area of the acoustical wave egress port. Through use of a masked grille having a small percentage of open grille space it is possible to impro... | 07/16/1985 |
| 4518443 | Acoustic diaphragm An acoustic diaphragm formed of beryllium or an alloy composed mainly of beryllium. Said diaphragm has a crystal structure having its plane (1120) preferentially orientated in parallel with the surface of the diaphragm.... | 05/21/1985 |
| 4471085 | Diaphragm material for loudspeakers A diaphragm material for use in making loudspeakers comprising a base material of olefin resin and a reinforcement in the form of flaky material. The base material is 4-methylpentene polymer with or without the addition of another olefin resin. The flaky ... | 09/11/1984 |
| 4436966 | Conference microphone unit A microphone unit particularly suitable for conference applications is provided, wherein an acousto-electric transducer is disposed between two dish-like back-to-back sound collectors, each having a central aperture exposing one side of the transducer, wh... | 03/13/1984 |
| 4434203 | Diaphragm A diaphragm having a pattern of wrinkles adapted so that the diaphragm is both radially and tangentially expandable with respect to a reference point in that central portion.... | 02/28/1984 |
| 4426556 | Electrodynamic loudspeaker An electrodynamic loudspeaker which comprises a generally rectangular flat vibrating plate, and first and second magnetic drives for driving the vibrating plate to produce vibrations. The first magnetic drive is so positioned as to drive the vibrating pla... | 01/17/1984 |
| 4399334 | Speaker unit for headphones A speaker unit for headphones including a magnetic circuit which has a magnetic gap and including a diaphragm which is moveable to generate sound in response to energy applied to a coil wound on a bobbin which is connected to the diaphragm and mounted wit... | 08/16/1983 |
| 4379213 | Electroacoustical converter A barrel-shaped diaphragm comprising a plurality of barrel stave-like strips with slits forming gaps between them is mounted on the vibration coil of a vibration generator that is based on a housing. A traverse bar which is based on the housing extends up... | 04/05/1983 |
| 4173701 | Speaker diaphragm molded from poly-biphenol phthalate type resin film A speaker diaphragm molded from a poly-bisphenol phthalate type plastic film having ester linkages prepared from an aromatic dicarboxylic acid such as isophthalic acid or terephthalic acid or a mixture thereof and a bifunctional phenol such as bisphenol A... | 11/06/1979 |
| 4147229 | Vibratile mode speaker cabinet This invention relates to a cabinet for audio reproduction speakers of the type which have a movable speaker cone mounted within a fixed speaker frame. The cabinet includes a plurality of external cabinet members juxtaposed to form a substantially rectang... | 04/03/1979 |
| 3983337 | Broad-band acoustic speaker A very small audio speaker is described which has a broad-band electrical-mechanical transducer, a broad-band mechanical-air-transducer, and a special suspension system which combine to produce a substantially flat frequency response over substantially th... | 09/28/1976 |
| 3939942 | Electroacoustic transducers The present invention comprises a radially pulsating cylindrical surface operating as a wave transmission-line. The device is responsive to electrical means and may be practically utilized to generate pressure waves. A conventional electromagnetic driving... | 02/24/1976 |
