Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
75 words
A moving coil loudspeaker comprising: magnetic field structure means for providing unidirectional magnetic flux across an air gap; acoustic diaphragm means; and coil means positioned in the air gap and connected to the diaphragm means, said coil means having two or more insulated wires twisted around one another and wound onto a coil form, to form coils having approximately the same resistance and inductance and cutting substantially the same flux lines in the air gap.
Claim 2
Dependent Claim
75 words
A moving coil loudspeaker comprising: magnetic field structure means for providing unidirectional magnetic flux across an air gap; acoustic diaphragm means; and coil means positioned in the air gap and connected to the diaphragm means, said coil means having two or more insulated wires twisted around one another and wound onto a coil form, to form coils having approximately the same resistance and inductance and cutting substantially the same flux lines in the air gap.
Claim 3
Dependent Claim
18 words
A moving coil loudspeaker as claimed in claim 1 in which the coils are connected in series aiding.
Claim 4
Dependent Claim
20 words
A moving coil loudspeaker as claimed in claim 1 having one or more pairs of coils connected in series bucking.
Claim 5
Dependent Claim
51 words
A moving coil loudspeaker as claimed in claim 1 wherein the coils are connected into first and second groups each having one or more coils; the first group being connected to input terminals, and the second group being connected to feedback amplifier means having an output connected to the first group.
Claim 6
Dependent Claim
30 words
A moving coil loudspeaker as claimed in claim 5 wherein the amplifier means is a constant voltage amplifier having an output connected in series with the first group of coils.
Claim 7
Dependent Claim
15 words
A moving coil loudspeaker as claimed in claim 6 wherein the amplifier gain is 1.
Claim 8
Dependent Claim
32 words
A moving coil loudspeaker as claimed in claim 6 which further includes inductance means connected in series with the first group of coils, and wherein the amplifier gain is greater than unity.
Claim 9
Dependent Claim
132 words
A moving coil loudspeaker comprising: magnetic field structure means for providing unidirectional magnetic flux across an air gap; acoustic diaphragm means; coil means positioned in the air gap and connected to the diaphragm means, said coil means having a plurality of insulated coils having approximately the same resistance and inductance and cutting substantially the same flux lines in the air gap, and the coils being connected into first and second groups each having one or more coils, the first group being connected to input terminals; capacitance means connected to the input terminals in parallel to the first group of coils; and a constant current feedback amplifier with an input coupled to the second group of coils and an output coupled to the input terminals in parallel to the first group of coils.
Claim 10
Dependent Claim
132 words
A moving coil loudspeaker comprising: magnetic field structure means for providing unidirectional magnetic flux across an air gap; acoustic diaphragm means; coil means positioned in the air gap and connected to the diaphragm means, said coil means having a plurality of insulated coils having approximately the same resistance and inductance and cutting substantially the same flux lines in the air gap, and the coils being connected into first and second groups each having one or more coils, the first group being connected to input terminals; capacitance means connected to the input terminals in parallel to the first group of coils; and a constant current feedback amplifier with an input coupled to the second group of coils and an output coupled to the input terminals in parallel to the first group of coils.
Claim 11
Dependent Claim
29 words
A moving coil loudspeaker as claimed in claim 8 wherein the coil means consists of two or more wires twisted around one another and wound onto a coil form.