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Match
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Document |
Document Title |
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4251807 |
Miniature buzzer
A miniature buzzer for a pocket pager and the like is provided. The buzzer includes a support member in the form of a cylindrical collar having a bore extending therethrough. The bore is stepped...
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4191863 |
Support for multi-point magnetic driver loudspeaker
A dynamic loudspeaker of the plane vibrating-plate, multi-point drive type has a support structure in the rear of the plane plate or diaphragm supporting the forward ends of a plurality of magnetic...
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4143537 |
Method for the manufacture of loud speakers
A method for the manufacture of loud speakers of the type comprising in particular a pot for containing a magnet, which method is characterized in that the pot is made in one single piece by...
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4122314 |
Loudspeaker having a laminate diaphragm of three layers
A loudspeaker having a diaphragm including first and second layers and a core sandwiched between the layers, the core being firmly secured to the inner surface of each layer so as to form a unitary...
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4027111 |
Ribbon loudspeaker
A ribbon loudspeaker comprises, in accordance with the invention, permanent magnets constituting a disconnected magnetic system and sound reproducing ribbons freely vibrating independently of one...
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4013846 |
Piston loudspeaker
An electroacoustic loudspeaker having a rigid, light-weight diaphragm and a substantially closed loop magnet support of a magnetically permeable material having a channel-shaped cross-section and...
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4010334 |
Moving magnet contact acoustic transducer
A dynamic acoustic transducer device of small, compact, highly efficient design, wherein a vibratable diaphragm is supported in an open side of a casing, a pair of permanent magnets being secured...
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4000381 |
Moving magnet transducer
A miniature acoustical transducer. The transducer includes a diaphragm, spring member and electromagnetic coils secured within a substantially cylindrical housing. The coils are arranged on...
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3835427 |
SOLID-BORNE SOUND TRANSDUCERS
A solid-borne sound transducer for the precise measurement of vibrations consisting of a pot-shaped stator, a bell-shaped oscillator located coaxially within the stator and supported by a...
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3783311 |
MAGNETIC DEVICE FOR USE IN ACOUSTIC APPARATUS
This invention relates to a magnetic device comprising a magnet, a center pole secured to an upper surface of said magnet, a yoke enclosing said magnet and said center pole such that a gap is...
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3497638 |
EXPLOSION-PROOF ACOUSTIC DEVICE
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3466405 |
PERMANENT MAGNET BASKET ASSEMBLY FOR A SPEAKER
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3454912 |
TRANSDUCER DRIVE ROD
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3436568 |
ELECTROMAGNETIC VIBRATORY DEVICES
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3356796 |
Field case assembly for loudspeaker
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3322897 |
Coil pick-up and tube recorder system
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3261927 |
Electroacoustic transducer comprising a magnetic system with annular air gap and a resonator
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3255317 |
Stereo microphone
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3250862 |
High energy compact permanent magnet assembly for loud speakers
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3247331 |
Magnetic structure for a loudspeaker
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3222753 |
Speaker magnet structure and method of forming the same
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3176086 |
Transducer field structure assembly
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3164686 |
Electrodynamic transducer
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3160716 |
Transducer
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3134057 |
Magnetic circuit for the deflection of flux leakage
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3128537 |
Manufacture of electromagnetic devices
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3118972 |
Acoustic apparatus
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3109072 |
Loud-speaker
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3059720 |
High frequency loudspeakers
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3050593 |
Phonograph, particularly sound tape apparatus
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3013905 |
Electroacoustic transducers
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3013189 |
Electro-mechanical transducer
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3009084 |
Electromechanical transducer
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2977418 |
Combined oscillator and head phone for code practice
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2963557 |
Magnetic structure
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2957053 |
Audio-electric translating device
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2949663 |
Method of assembly of a loud speaker
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2927976 |
Acoustic signal transducers
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2923783 |
Electro-acoustical transducer
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2864898 |
Transducer devices
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2801294 |
Electrodynamic receiving apparatus
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2781461 |
Electromagnetic vibration exciter
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0936503 |
Title is not available
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