| 主权项 |
1. A rotary reciprocating acoustic transducer for producing sound in response to an applied electrical signal, comprising:
(a) a tubular housing having a generally cylindrical chamber with an interior lumen defining a cylindrical sidewall terminating in a first open end which opposes a second open end, said tubular housing being generally symmetrical about a central axis; (b) a first linear reciprocating electrodynamic motor having a voice coil member, said first motor being mounted over the tubular housing member's first open end with said first motor's voice coil member oriented inwardly, facing the lumen; (c) a second linear reciprocating electrodynamic motor having a voice coil member, said second motor being mounted over the tubular housing member's second open end with said second motor's voice coil member oriented inwardly, facing the lumen and said first motor; (d) an elongate rigid camshaft affixed between said first motor's voice coil member and said second motor's voice coil member, said camshaft carrying a radially projecting helical worm gear surface; (e) a rotatable transducer vane assembly comprising an axially aligned cam sleeve having a central sleeve lumen with inwardly projecting cam surfaces configured to rotatably engage said camshaft's radially projecting helical worm gear surface; (f) said vane assembly further including at least first and second rotating inclined vanes projecting radially away from said cam sleeve; (g) said camshaft and said rotatable transducer vane assembly forming a rotor assembly configured to rotatably fit within said chamber's interior lumen, (h) said tubular housing having at least first and second inwardly projecting stationary vanes mounted in said chamber between said movable vanes and extending between said cylindrical sidewall and said cam sleeve and between said end walls, (i) said cylindrical chamber having at least first and second ports opening through the walls of said cylindrical chamber to direct air flow into and out of the cylinder's interior lumen in response to rotary reciprocating movement of the movable vanes, (j) wherein said first and second linear reciprocating electrodynamic motors, being coupled to the camshaft are configured to simultaneously apply cooperating linear reciprocating movement to said camshaft so that said camshaft, engaging said cam sleeve, provides rotational reciprocating movement to the rotor assembly, through a selected excursion arc which is controlled by the reciprocating linear excursion of the first and second motor voice coil members. |
