US3732465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic sensing and actuator system
Assignee: Individual
•
Filing: 1971-09-20
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Granted: 1973-05-08
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Expires: 1991-09-20
Abstract
Abstract An electronic sensing and actuator control system for sensing an energy change dependant on the proximity of a coded member to a sensor mechanism, the mechanism including an electric field producing means operative over a range of continuously varying frequencies; the coded member including a passive energy absorbing circuit responsive to a predetermined frequency range and adapted for placement in proximity to said mechanism to create a variation in the energy level of said electric field producing means; detecting means for detecting variations in the energy level of said electric field; and control-actuator means adapted to respond to the detecting means.
Inventors
- 👤 R Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/08; G06K7/082; G06K7/083; G06K7/086; G07; G07C; G07C9/00; G07C9/00174; G07C9/00658; G07C9/00714; G07C9/20; G07C9/28
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
174 words
An electronic sensing and actuator control system for controlling an actuator, the system comprising, in combination: a variable frequency oscillator means adapted to repeatedly sweep through a range of operating frequencies and generate a field at said operating frequencies within a sensing zone, the oscillator being adapted to generate an energy level signal representative of the energy level of the output field; a key unit means adapted to be transported to said sensing zone, the key unit comprising a field sensitive circuit having at least one selected resonant frequency, said resonant frequency being of a value within the range of frequencies of said oscillator; an energy level detector means for receiving said energy level signal, detecting variations in the energy level of the oscillator means and generating a responsive detection output signal responsive to the energy level of the oscillator means; a controller network adapted to be responsive to the detector output signal to generate responsive control signals for controlling an actuator mechanism; and means for interconnecting the controller network to an actuator mechanism.
Claim 2
Dependent Claim
174 words
An electronic sensing and actuator control system for controlling an actuator, the system comprising, in combination: a variable frequency oscillator means adapted to repeatedly sweep through a range of operating frequencies and generate a field at said operating frequencies within a sensing zone, the oscillator being adapted to generate an energy level signal representative of the energy level of the output field; a key unit means adapted to be transported to said sensing zone, the key unit comprising a field sensitive circuit having at least one selected resonant frequency, said resonant frequency being of a value within the range of frequencies of said oscillator; an energy level detector means for receiving said energy level signal, detecting variations in the energy level of the oscillator means and generating a responsive detection output signal responsive to the energy level of the oscillator means; a controller network adapted to be responsive to the detector output signal to generate responsive control signals for controlling an actuator mechanism; and means for interconnecting the controller network to an actuator mechanism.
Claim 3
Dependent Claim
99 words
The system of claim 1 in which the variable frequency oscillator means is adapted to repeatedly sweep through a range of operating frequencies and generate an electrical field at said operating frequencies within a sensing zone, the oscillator being adapted to generate an energy level signal representative of the energy level of the output field; and the key unit means adapted to be transported to said sensing zone, the key unit comprising an electrical field sensitive circuit having at least one selected resonant frequency, said resonant frequency being of a value within the range of frequencies of said oscillator.
Claim 4
Dependent Claim
48 words
The system of claim 2 further including a comparator network for comparing the actual frequency of the oscillator means to at least one preselect frequency, the comparator network adapted to generate a responsive comparator control signal responsive to the relationship of said actual frequency and said preselected frequency.
Claim 5
Dependent Claim
24 words
The system of claim 3 in which the controller means is adapted to respond to said detector output signal and said comparator control signal.
Claim 6
Dependent Claim
159 words
The system of claim 4 in which the detector means is adapted to generate a first detector output signal state responsive to variations in energy level of the oscillator means and a second detector output signal state responsive to the steady state energy level of the oscillator means; the comparator network is adapted to generate a first comparator output signal state responsive to coincidence of the actual frequency of the oscillator and said selected resonant frequency and a second comparator output signal state responsive to the absence of coincidence of the actual frequency of the oscillator and said selected frequency; and the controller network is adapted to respond in at least two different modes, one of said modes being in response to receiving the first detector output signal state and the first comparator output signal state and another of said modes being in response to receiving the first detector output signal state and the second detector output signal state.
Claim 7
Dependent Claim
24 words
The system of claim 5 in which the key unit means includes passive electronic components joined in a circuit of said selected resonant frequency.
Claim 8
Dependent Claim
59 words
The system of claim 6 in which the oscillator means is in the form of a voltage frequency oscillator adapted to sweep through a range of frequencies responsive to a sweep reference voltage; and including a sweep voltage source adapted to generate a sweep reference voltage and engaged to the oscillator means to control the frequency of the oscillator.
Claim 9
Dependent Claim
72 words
The system of claim 7 in which the comparator network is in the form of a voltage comparator, the comparator being engaged to the sweep voltage source to receive said sweep reference voltage, the comparator network further adapted to receive at least one preset reference voltage of a fixed value, each of said preset reference voltages being adapted to be preset of a value corresponding to one of said selected resonant frequencies.
Claim 10
Dependent Claim
51 words
The system of claim 8 in which the energy level detector means includes an input means for receiving said energy level signal and first differentiating means for differentiating said energy level signal and producing a signal representative of the rate of change of the peak amplitude of said energy level signal.
Claim 11
Dependent Claim
40 words
The system of claim 9 in which the energy level detector means further includes a second differentiating means for differentiating the signal of said first differentiating means for producing a signal representative of the peak of said energy level signal.
Claim 12
Dependent Claim
64 words
The system of claim 10 in which the controller network includes a logic AND gate extending to the comparator network and to the detector means and adapted to generate a control signal responsive to the time relationship of said comparator output signal state and said detector output signal state; and an actuator mechanism adapted to respond to the control signal of said AND gate.
Claim 13
Dependent Claim
61 words
The system of claim 1 further including a digital-to-analog converter for generating a frequency reference voltage responsive to input digital signals for controlling and converter, the counter means being responsive to a clock means extending to the counter means through a disabling means, said disabling means being adapted to disable the counter responsive to a control demand of the controller network.
Claim 14
Dependent Claim
57 words
The system of claim 12 in which the controller network is in the form of an AND gate adapted to respond to said detector output signal and to said disabling means, an OR gate adapted to respond to said AND gate output and said counter such that the counter is disabled responsive to said detector output signal.
Claim 15
Dependent Claim
42 words
The system of claim 7 in which the key unit means includes a plurality of electrical field sensitive circuits each having a select resonant frequency, each of said resonant frequencies being of a value within the range of frequencies of said oscillator.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |