Telemetric system

Claim 2

In a telemetric system for electromagnetically relaying in-bore transducer data from a missile after it is trajected from a muzzle into a given trajectory, comprising: means for receiving said transducer data after a predetermined delay corresponding to a launch interval of said missile; which includes; a conductive coil positioned adjacent to said muzzle and having longitudinally spaced windings distributed alongside said trajectory, the length of said conductive coil being equal to or greater than the distance traveled by said missile during the transmission of said transducer data; and utilization means coupled to said conductive coil and responsive to said transducer data.

Claim 3

In a telemetric system according to claim 1 wherein said effective length of said conductive coil is at least the distance traveled by said missile during the transmission of said burst of transducer data.

Claim 4

In a telemetric system according to claim 2 wherein said utilization means comprises: a filter means for passing frequency components within a predetermined spectrum produced from said conductive coil.

Claim 5

In a telemetric system according to claim 3 wherein said filter means comprises: a plurality of bandpass filters, each having a bandpass spectrum centered about a different frequency, whereby said utilization means provides frequency division demultiplexing.

Claim 6

In a telemetric system according to claims 3 or 4 wherein said filter means passes frequency components in a range having values of less than one megaHertz.

Claim 7

In a telemetric system according to claim 5 wherein said filter means passes frequency components produced by said conductive coil in a range having values in the order of magnitude of the threshold between audio and supersonic frequencies.

Claim 8

In a telemetric system according to claim 3 wherein said filter means comprises: a capacitive element coupled across said conductive coil in a parallel-resonant arrangement.

Claim 9

In a telemetric system according to claim 5 further comprising: a plurality of frequency discriminators each operative to detect frequency modulation and each driven by a corresponding one of said plurality of bandpass filters.

Claim 10

In a telemetric system for electromagnetically relaying in-bore transducer data from a missile after it is trajected from a muzzle into a given trajectory comprising: means mounted in said missile for transmitting said transducer data after a predetermined delay corresponding to the launch interval of said missile which includes; a plurality of transducers for producing a data signal responsive to an operating parameter of said missile; modulator means having a data input terminal for producing a carrier signal modulated in response to signals applied to said data input terminal; delay means for coupling said data signal to said data input terminal after a predetermined delay corresponding to a launching interval during which said missile accelerates to and exits from said muzzle; and a missile coil mounted on the outside of said missile and driven by said carrier signal at a carrier frequency of less than one megaHertz and having a Q value adjusted to provide broadband width; a conductive coil inductively coupled to said missile coil and adjusted to have said Q value of said missile coil, positioned adjacent to said muzzle and having longitudinally spaced windings distributed alongside said trajectory, the length of said conductive coil being equal to or greater than the distance traveled by said missile during the transmission of said transducer data; and utilization means coupled to said conductive coil and responsive to said transducer data.

Claim 11

In a telemetric system for electromagnetically relaying in-bore transducer data from a missile after it is trajected from a muzzle into a given trajectory comprising: means mounted in said missile for transmitting said transducer data after a predetermined delay corresponding to the launch interval of said missile which includes; a plurality of transducers for producing a data signal responsive to an operating parameter of said missile; modulator means having a data input terminal for producing a carrier signal modulated in response to signals applied to said data input terminal; delay means for coupling said data signal to said data input terminal after a predetermined delay corresponding to a launching interval during which said missile accelerates to and exits from said muzzle; and a missile coil mounted on the outside of said missile and driven by said carrier signal at a carrier frequency of less than one megaHertz and having a Q value adjusted to provide broadband width; a conductive coil inductively coupled to said missile coil and adjusted to have said Q value of said missile coil, positioned adjacent to said muzzle and having longitudinally spaced windings distributed alongside said trajectory, the length of said conductive coil being equal to or greater than the distance traveled by said missile during the transmission of said transducer data; and utilization means coupled to said conductive coil and responsive to said transducer data.

Claim 12

In a telemetric system according to claim 9 wherein said missile coil is wound about the central longitudinal axis of said missile.

Claim 13

In a telemetric system according to claim 10 wherein said modulator means provides frequency modulation.

Claim 14

In a telemetric system according to claim 11 further comprising a capacitor coupled to said missile coil in a series-resonant arrangement.

Claim 15

In a telemetric system according to claim 12 wherein said utilization means comprises: a filter means for passing frequency components within a predetermined spectrum produced from said conductive coil.

Claim 16

In a telemetric system according to claim 13 wherein said filter means passes frequency components in a range having values of less than one megaHertz.

Claim 17

In a telemetric system according to claim 14 wherein said filter means passes frequency components produced by said conductive coil in a range having values in the order of magnitude of the threshold between audio and supersonic frequencies.

Claim 18

In a telemetric system according to claim 17 wherein said filter means comprises: a capacitive element coupled across said conductive coil in a parallel-resonant arrangement.

Claim 19

In a telemetric system according to claim 9 wherein said carrier frequency is in the order of magnitude of the threshold between audio and supersonic frequencies.