Back to results
US 4,903,308 AGranted
Audio transducer with controlled flexibility diaphragm
AssigneeLinaeum Corporation
InventorsPaul W. Paddock, Steven R. Geist
Life of this patent
Estimating the term…
Abstract
An improved audio transducer includes a diaphragm having a pair of cylindrically-shaped webs that provide greater bandwidth, reduced distortion and greater horizontal dispersion of sound. The audio output of the transducer is further improved by forming the diaphragm of a polyvinyl fluoride film. Other improvements include the use of damping pads to damp internal sound waves and damping strips on the diaphragm to minimize distortion at the resonant frequency of the transducer.
Claims11
An audio transducer, comprising:
- a frame;
- a diaphragm comprising a pair of elongate resilient webs having portions joined to each other to form a movable expanse extending substantially in a plane, the expanse being movable in the direction of the plane, the webs each having a flexible end portion extending from the expanse in an arc to a remote frame location, each frame location substantially aligned through the expanse with the other remote frame location;
- coil means attached to the expanse of the diaphragm;
- magnetic means for producing opposing magnetic fields extending normal to the expanse;
- and
- connecting means for conducting electrical impulses to the coil means.
3 more elements
An audio transducer, comprising:
- a frame;
- a diaphragm comprising a pair of elongate resilient webs having intermediate portions joined to each other to form a movable expanse extending substantially in a plane, the expanse being movable in the direction of the plane, the webs each having opposing end portions connected to the intermediate portion, the end portions extending from the intermediate portion in opposite arcs and securing to adjacent frame locations to form a substantially cylindrically shaped web, the frame locations for one web being substantially aligned through the expanse with the frame locations for the other web;
- coil means attached to the expanse of the diaphragm;
- magnetic means for producing opposing magnetic fields extending normal to the expanse;
- and
- connecting means for conducting electrical impulses to the coil means.
3 more elements
An audio transducer, comprising:
- a frame;
- a diaphragm comprising a pair of elongate resilient webs having intermediate portions joined to each other to form a movable expanse extending substantially in a plane, the expanse being movable in the direction of the plane, each web having opposing flexible end portions extending from its intermediate portion in opposite arcs to remote adjacent frame locations to form a substantially cylindrically shaped web;
- coil means attached to the expanse of the diaphragm;
- magnetic means for producing opposing magnetic fields extending normal to the expanse through the coil means;
- and
- connecting means for conducting electrical impulses to the coil means.
3 more elements
Dependencies are inferred from the claim text.