Proximity indicating means

Claim 2

In an electronic indicating device for the purpose described, a frequency modulated radio frequency transmitter and a radio frequency receiver, said transmitter and receiver having at least one common transmitting and receiving antenna and inductive capacity tuning means, said reciever having the ability to reject the relatively strong signal from its own transmitter, yet able to detect and receive the relatively weak signal from a distant similar transmitter, said device having the ability to audibly and visually indicate the presence of the source of the said relatively weak signal from the said distant similar transmitter, all receivers and transmitters being in simultaneous operation and on the same frequency.

Claim 3

In an electronic indicating device for the purpose described as in claim 1 wherein the said device includes a means to vary the fundamental frequency of the modulated radio frequency transmitter by changes in barometric pressure, the output of the said modulated radio frequency transmitter being adapted to actuate an electronic amplifying means, said electronic amplifying means being adapted to actuate a digital to analogue converter and a detecting means for a various distance indicating means and a differential altitude indicating means.

Claim 4

In a device for the purpose described, a combined radio frequency transmitter and reciever, said receiver having the ability to reject the relatively strong signal froM the said transmitter, but capable of receiving a relatively weak signal from a distant similar transmitter on the same frequency, the said transmitter and receiver functioning simultaneously through, at least, one common antenna and one inductive capacity tuning means, said device being capable of audibly and visually indicating the presence of the source of the said relatively weak signal from the said distant similar transmitter.

Claim 5

In a device for the purpose described, a combined radio frequency transmitter and reciever, said receiver having the ability to reject the relatively strong signal froM the said transmitter, but capable of receiving a relatively weak signal from a distant similar transmitter on the same frequency, the said transmitter and receiver functioning simultaneously through, at least, one common antenna and one inductive capacity tuning means, said device being capable of audibly and visually indicating the presence of the source of the said relatively weak signal from the said distant similar transmitter.

Claim 6

In a device for the purpose described as in claim 3, wherein the said device includes a frequency changing means relative to changes in barometric pressure and means to amplify the output of the said device, said output being adapted to actuate a digital to analogue converting means and a detecting means for various distance indicators and a differential altitude indicating means.

Claim 7

In a proximity indicating device of the type described, an antenna connected to an inductive capacity input and output tuning means, said inductive capacity input and output tuning means being the input and output of a radio frequency transceiver, said radio frequency transceiver embodying a radio frequency generating source, said radio frequency generating source being connected to the respective grids of a plurality of vacuum tubes, a capacitive means to equalize the radio frequency power applied to the respective grids of the said plurality of vacuum tubes, said plurality of vacuum tubes each having its own independent plate load resistor and a common cathode resistor plus a plate current equalizing potentiometer connected between the respective cathodes of the said plurality of vacuum tubes, a visual tuning and balance indicator connected to the output of the said plurality of vacuum tubes, means to switch from the said visual tuning and balancing indicator to a final output indicating means and a direct current power source applied to the said plurality of vacuum tubes.

Claim 8

In a proximity indicating device of the type described, an antenna connected to an inductive capacity input and output tuning means, said inductive capacity input and output tuning means being the input and output of a radio frequency transceiver, said radio frequency transceiver embodying a radio frequency generating source, said radio frequency generating source being connected to the respective grids of a plurality of vacuum tubes, a capacitive means to equalize the radio frequency power applied to the respective grids of the said plurality of vacuum tubes, said plurality of vacuum tubes each having its own independent plate load resistor and a common cathode resistor plus a plate current equalizing potentiometer connected between the respective cathodes of the said plurality of vacuum tubes, a visual tuning and balance indicator connected to the output of the said plurality of vacuum tubes, means to switch from the said visual tuning and balancing indicator to a final output indicating means and a direct current power source applied to the said plurality of vacuum tubes.

Claim 9

In a proximity indicating device of the type described as in claim 5 wherein the said device includes an altitude transducer connected to and functioning with respect to the inductive capacity input and output tuning means and the radio frequency generating source, an electronic amplifying means connected to the output of the said device, said electronic amplifying means being capable of transferring the signal to a digital to analogue converter and various level detecting means, thence to a plurality of different distance indicators and a differential altitude indicating means.

Claim 10

In a device of the class described, an antenna with an inductive capacity input and output tuning means connected thereto, said input and output tuning means being the input and output of a radio frequency transceiver, said radio frequency transceiver embodying a pair of vacuum tubes, each one of the said vacuum tubes having at least three elements, said vacuum tubes being in separate and parallel circuits, each one of the said parallel circuits having its own independent plate load resistor and a common cathode resistor functioning in, and with respect to both parallel circuits, a potentiometer connected between the cathodes of the said vacuum tubes with its variable midpoint connected to the said common cathode resistor, the said potentiometer being a means to equalize the plate current flow in each of the said vacuum tubes, a radio frequency generating means connected to each of the grids of the said vacuum tubes through different and independent variable capacitors, said variable capacitors being a radio frequency balancing means as applied to the respective grids of each of the said vacuum tubes, a differential tuning and balance indicating meter connected to the output of the said pair of vacuum tubes, a switching means from the said differential tuning and balance indicating meter to an output indicating means, a plate power source and a grid bias power source applied to the said pair of vacuum tubes.

Claim 11

In a device of the class described, an antenna with an inductive capacity input and output tuning means connected thereto, said input and output tuning means being the input and output of a radio frequency transceiver, said radio frequency transceiver embodying a pair of vacuum tubes, each one of the said vacuum tubes having at least three elements, said vacuum tubes being in separate and parallel circuits, each one of the said parallel circuits having its own independent plate load resistor and a common cathode resistor functioning in, and with respect to both parallel circuits, a potentiometer connected between the cathodes of the said vacuum tubes with its variable midpoint connected to the said common cathode resistor, the said potentiometer being a means to equalize the plate current flow in each of the said vacuum tubes, a radio frequency generating means connected to each of the grids of the said vacuum tubes through different and independent variable capacitors, said variable capacitors being a radio frequency balancing means as applied to the respective grids of each of the said vacuum tubes, a differential tuning and balance indicating meter connected to the output of the said pair of vacuum tubes, a switching means from the said differential tuning and balance indicating meter to an output indicating means, a plate power source and a grid bias power source applied to the said pair of vacuum tubes.

Claim 12

In combination in a device for the purpose described, an antenna connected to an inductIve capacity input and output tuning means, said inductive capacity input and output tuning means being the input and output of a radio frequency transceiver, said radio frequency transceiver embodying a first pair of transistors, each one of the said first pair of transistors being in separate and parallel circuits, each one of the said parallel circuits having its own collector load resistor and a common emitter resistor, functioning in, and with respect to both said parallel circuits, a potentiometer connected between the emitters of the said first transistors with its variable midpoint connected to the said common emitter resistor, said potentiometer being a means to equalize the collector current flow in each of the said first transistors, a frequency modulated radio frequency generating means connected to the base of each one of the said first transistors through different and independent capacitors, at least one being variable, said independent capacitors being a radio frequency balancing means as applied to the bases of each one of the said first transistors, a second pair of transistors in a floating amplifier stage connected to the output of the said first pair of transistors thence to a differential visual balance and tuning indicator with means to switch from the said differential visual balance and tuning indicator to a final output indicating means, and a direct current power source applied to all transistors.

Claim 13

In combination in a device for the purpose described, an antenna connected to an inductIve capacity input and output tuning means, said inductive capacity input and output tuning means being the input and output of a radio frequency transceiver, said radio frequency transceiver embodying a first pair of transistors, each one of the said first pair of transistors being in separate and parallel circuits, each one of the said parallel circuits having its own collector load resistor and a common emitter resistor, functioning in, and with respect to both said parallel circuits, a potentiometer connected between the emitters of the said first transistors with its variable midpoint connected to the said common emitter resistor, said potentiometer being a means to equalize the collector current flow in each of the said first transistors, a frequency modulated radio frequency generating means connected to the base of each one of the said first transistors through different and independent capacitors, at least one being variable, said independent capacitors being a radio frequency balancing means as applied to the bases of each one of the said first transistors, a second pair of transistors in a floating amplifier stage connected to the output of the said first pair of transistors thence to a differential visual balance and tuning indicator with means to switch from the said differential visual balance and tuning indicator to a final output indicating means, and a direct current power source applied to all transistors.

Claim 14

In combination in a device for the purpose described, as in claim 8 wherein the said device includes an altitude transducer connected to and functioning with respect to the inductive capacity input and output tuning means and the frequency modulated radio frequency generating means, an electronic amplifying means connected to the output of the said device, said electronic amplifying means being capable of transferring the signal to a digital to analogue converter and various level detecting means thence to a plurality of different distance indicators and a differential altitude indicating means.

Claim 15

In combination in a device for the purpose described, an antenna connected to an inductive capacity input and output tuning means, said inductive capacity input and output tuning means being the input and output of a radio frequency transceiver, said radio frequency transceiver embodying, at least, a first pair of transistors, each one of the said first transistors being in separate and parallel circuits, each one of the said parallel circuits having its own collector load resistor and sharing a common emitter resistor functioning in, and with respect to both said parallel circuits, a potentiometer connected between the emitters of the said first transistors with its variable midpoint connected to the said common emitter resistor, said potentiometer being a means to equalize the collector current flow in each of the said transistors, a phase shifting means connected between the bases of the said first transistors, a frequency modulated radio frequency generating means connected to the base of each one of the said first transistors through a plurality of capacitors, at least one being variable, part of the said plurality of capacitors serving as part of the said phase shifting means, a capacitive radio frequency balancing means as applied to the bases of each one of the said first transistors, a second pair of transistors in a floating amplifier stage connected to the output of the said first transistors thence to a differential visual balance and tuning indicator with means to switch from the said differential visual balance and tuning means to a final output indicating means, an altitude transducer functioning with respect to the said frequency modulated radio frequency means and the said inductive capacity input and output tuning means, and a direct current power source applied to all transistors.

Claim 16

In combination in a device for the purpose described, an antenna connected to an inductive capacity input and output tuning means, said inductive capacity input and output tuning means being the input and output of a radio frequency transceiver, said radio frequency transceiver embodying, at least, a first pair of transistors, each one of the said first transistors being in separate and parallel circuits, each one of the said parallel circuits having its own collector load resistor and sharing a common emitter resistor functioning in, and with respect to both said parallel circuits, a potentiometer connected between the emitters of the said first transistors with its variable midpoint connected to the said common emitter resistor, said potentiometer being a means to equalize the collector current flow in each of the said transistors, a phase shifting means connected between the bases of the said first transistors, a frequency modulated radio frequency generating means connected to the base of each one of the said first transistors through a plurality of capacitors, at least one being variable, part of the said plurality of capacitors serving as part of the said phase shifting means, a capacitive radio frequency balancing means as applied to the bases of each one of the said first transistors, a second pair of transistors in a floating amplifier stage connected to the output of the said first transistors thence to a differential visual balance and tuning indicator with means to switch from the said differential visual balance and tuning means to a final output indicating means, an altitude transducer functioning with respect to the said frequency modulated radio frequency means and the said inductive capacity input and output tuning means, and a direct current power source applied to all transistors.

Claim 17

In combination in a device for the purpose described as in claim 10 wherein the said device includes an electronic amplifying means connecteD to the output of the second pair of transistors forming the floating amplifier, said electronic amplifying means transferring the signal to a digital to analogue converter and a various level detecting means, thence to a plurality of different distance indicating means and a differential altitude indicating means.

Claim 18

In a device for the purpose described, an antenna with at least one inductive capacity tuning input and output means connected thereto, said inductive capacity tuning input and output means being the input and output of a radio frequency transceiver, said radio frequency transceiver embodying a pair of similar vacuum tubes, each one of the said similar vacuum tubes having at least three elements, said similar vacuum tubes being in separate and parallel circuits, each one of the said parallel circuits having its own independent plate load resistor and a common cathode resistor functioning in and with respect to both said circuits, a potentiometer connected between the respective cathodes of each of the said similar vacuum tubes with its variable midpoint connected to the said common cathode resistor, the said potentiometer being a means to equalize the plate current flow in each of the said vacuum tubes, a radio frequency generating means connected to the respective grids of each of the said similar vacuum tubes through different and independent variable capacitors, said variable capacitors being a radio frequency balancing means as applied to the respective grids of each of the said similar vacuum tubes, a differential visual tuning and balance indicating means connected to the output of the said pair of similar vacuum tubes, a switching means from the said differential visual tuning and balance indicating means to, at least, one output indicating means, a plate power supply source and a grid bias power source applied to the said pair of similar vacuum tubes.

Claim 19

In a device for the purpose described, an antenna with at least one inductive capacity tuning input and output means connected thereto, said inductive capacity tuning input and output means being the input and output of a radio frequency transceiver, said radio frequency transceiver embodying a pair of similar vacuum tubes, each one of the said similar vacuum tubes having at least three elements, said similar vacuum tubes being in separate and parallel circuits, each one of the said parallel circuits having its own independent plate load resistor and a common cathode resistor functioning in and with respect to both said circuits, a potentiometer connected between the respective cathodes of each of the said similar vacuum tubes with its variable midpoint connected to the said common cathode resistor, the said potentiometer being a means to equalize the plate current flow in each of the said vacuum tubes, a radio frequency generating means connected to the respective grids of each of the said similar vacuum tubes through different and independent variable capacitors, said variable capacitors being a radio frequency balancing means as applied to the respective grids of each of the said similar vacuum tubes, a differential visual tuning and balance indicating means connected to the output of the said pair of similar vacuum tubes, a switching means from the said differential visual tuning and balance indicating means to, at least, one output indicating means, a plate power supply source and a grid bias power source applied to the said pair of similar vacuum tubes.

Claim 20

In combination in a device for the purpose described, said device having at least one transmitting and receiving antenna, said antenna being connected to, at least, on inductive capacity radio frequency tuning input and output means, said input and output means being the input and output of a radio frequency transceiver, said radio frequency transceiver embodying a pair of similar vacuum tubes and plate load resistors, each one of the said vacuum tubes having a common cathode resistor and a potentiometer connected from cathode to cathode of the said vacuum tubes with its variable center point connected to the said common cathode resistor, said potentiometer being a means to equalize the plate current flow in each of the said vacuum tubes, a radio frequency generating means connected to the grids of each of the said vacuum tubes through different and independent variable capacitors, said variable capacitors being capable of equalizing the amount of radio frequency energy applied to the respective grids of each of the said vacuum tubes, a zero center balancing and tuning meter connected to the output of the said vacuum tubes with means to switch from the said zero center balancing and tuning meter to a final output indicating means, a B+ and a C- power source applied to the said similar vacuum tubes.

Claim 21

In combination in a device for the purpose described, said device having at least one transmitting and receiving antenna, said antenna being connected to, at least, on inductive capacity radio frequency tuning input and output means, said input and output means being the input and output of a radio frequency transceiver, said radio frequency transceiver embodying a pair of similar vacuum tubes and plate load resistors, each one of the said vacuum tubes having a common cathode resistor and a potentiometer connected from cathode to cathode of the said vacuum tubes with its variable center point connected to the said common cathode resistor, said potentiometer being a means to equalize the plate current flow in each of the said vacuum tubes, a radio frequency generating means connected to the grids of each of the said vacuum tubes through different and independent variable capacitors, said variable capacitors being capable of equalizing the amount of radio frequency energy applied to the respective grids of each of the said vacuum tubes, a zero center balancing and tuning meter connected to the output of the said vacuum tubes with means to switch from the said zero center balancing and tuning meter to a final output indicating means, a B+ and a C- power source applied to the said similar vacuum tubes.