US3665086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loran trainer
Assignee: Singer Co
•
Filing: 1969-08-20
•
Granted: 1972-05-23
•
Expires: 1989-08-20
Abstract
Abstract A trainer for teaching the principles of Loran and the operation of Loran receivers, which trainer comprises a general-purpose digital computer driving an interface which generates the appropriate Loran signals to simultaneously represent several pairs of Loran transmitters, and Loran receivers which are stimulated by the output from the interface. In addition, a ''''ship control'''' is provided by which the trainee can control the speed and direction of the simulated ship and watch the resultant changes affect the Loran reception, and an instructor''s console containing equipment which allows an instructor to set up the initial conditions of a problem. The computer is programed to perform navigation computations based upon information applied to it from the instructor''s console and the ship control to modify the effects of the simulated ship movement upon the Loran signals which are generated. Several receivers may be stimulated in parallel with the primary receiver.
Inventors
- 👤 Edward F Magee
- 👤 Stephen G Haube
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:53
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/26; G01; G01S; G01S1/00; G01S1/02; G01S1/08; G01S1/20; G01S1/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
141 words
A radio navigation training system comprising a sourse of digital numbers, at least one radio navigation receiver, and means interconnecting said source and said receiver for transforming the outputs from said source into signals which simulate radio navigation transmissions, and means for applying said signals to said receiver, said interconnection means comprising at least a counter and a first register, at least one input to each of said counter and register being connected to an output of said computer so that digital information from said computer is inserted into said counter and said register, and clock pulse means connected to said counter to cause said counter to count at a prescribed rate from the value of the information inserted therein by said computer to the count limit of said counter, said counter generating an output signal when said limit is reached.
Claim 2
Dependent Claim
141 words
A radio navigation training system comprising a sourse of digital numbers, at least one radio navigation receiver, and means interconnecting said source and said receiver for transforming the outputs from said source into signals which simulate radio navigation transmissions, and means for applying said signals to said receiver, said interconnection means comprising at least a counter and a first register, at least one input to each of said counter and register being connected to an output of said computer so that digital information from said computer is inserted into said counter and said register, and clock pulse means connected to said counter to cause said counter to count at a prescribed rate from the value of the information inserted therein by said computer to the count limit of said counter, said counter generating an output signal when said limit is reached.
Claim 3
Dependent Claim
87 words
The trainer defined in claim 1 wherein said interconnection means further includes a first signal generator, said signal generator comprising a first register, a plurality of delay means, means for applying the output from said counter to the inputs of said register and said delay means, said counter input determining the time of occurrence of said signals, said register determining the length of the output signals from said signal generator and said delay means determining the number and time intervals between output signals from said signal generator.
Claim 4
Dependent Claim
55 words
The trainer defined in claim 2 wherein said interconnection means further includes means for connecting the output of said counter to an input of said source so that the output signal which indicates when a signal should be generated by the generator also indicates to the source when to transfer additional numbers into said counter.
Claim 5
Dependent Claim
17 words
The trainer defined in claim 3 wherein said source of digital numbers comprises a general-purpose digital computer.
Claim 6
Dependent Claim
38 words
The trainer defined in claim 4 further including a ship control panel, and means for connecting the output from said panel to inputs to said computer, said panel comprising means for generating signals representing vehicle speed and direction.
Claim 7
Dependent Claim
43 words
The trainer defined in claim 5 further including an input console, means for connecting the outputs from said console to inputs to said computer, said console comprising means for inserting into said computer information representing initial conditions for the operation of said trainer.
Claim 8
Independent Claim
127 words
A system for simulating a Loran navigational system for training purposes, said system comprising a general-purpose digital computer, a counter for receiving digital word outputs from said computer, a clock, means for applying the pulse outputs from said clock to said counter to cause said counter to count, said counter generating an output signal when the limit of its count is reached, a Loran pulse generator connected to the output of said counter for generating a Loran pulse whenever an output from the counter is received, a register connected to the output of the computer for receiving digital information therefrom, and means for transferring the information stored in said register to the Input of said generator to cause said generator to generate pulses having the required characteristics.
Claim 9
Independent Claim
127 words
A system for simulating a Loran navigational system for training purposes, said system comprising a general-purpose digital computer, a counter for receiving digital word outputs from said computer, a clock, means for applying the pulse outputs from said clock to said counter to cause said counter to count, said counter generating an output signal when the limit of its count is reached, a Loran pulse generator connected to the output of said counter for generating a Loran pulse whenever an output from the counter is received, a register connected to the output of the computer for receiving digital information therefrom, and means for transferring the information stored in said register to the Input of said generator to cause said generator to generate pulses having the required characteristics.
Claim 10
Independent Claim
299 words
A system for simulating Loran navigation systems which include a plurality of Loran transmitters each with a different pulse recurrence rate from the others and covering a wide geographical area, said simulation system comprising a general-purpose digital computer, at least one Loran receiver, and apparatus coupling said receiver to said transmitter, said apparatus comprising a counter, means for connecting said counter to said computer so that the numerical output from said computer loads said counter, a pulse generator having a fixed pulse rate, means for connecting said pulse generator to said counter so that the pulse output from said pulse generator is applied to said counter and causes said counter to count, said counter generating an output signal when the limit of its count is reached so that the time between output signals from said counter is determined by the value of the word loaded into into said counter from said computer, a Loran pulse generator, means for connecting said Loran pulse generator to the output of said counter so that a Loran pulse is generated whenever an output signal occurs from said counter, a first register and a second register, means for connecting said first register to the output of said computer so that said computer loads said first register, means for connecting said second register to the output of said first register so that said first register transfers information stored therein into said second register, means for transferring information in said second register to said Loran pulse generator to determine the characteristics of the pulse generated thereby, and means connecting the output from said counter to an input of said computer to cause said computer to again transfer digital information into said counter and into said first register whenever a signal output is generated by said counter.
Claim 11
Independent Claim
299 words
A system for simulating Loran navigation systems which include a plurality of Loran transmitters each with a different pulse recurrence rate from the others and covering a wide geographical area, said simulation system comprising a general-purpose digital computer, at least one Loran receiver, and apparatus coupling said receiver to said transmitter, said apparatus comprising a counter, means for connecting said counter to said computer so that the numerical output from said computer loads said counter, a pulse generator having a fixed pulse rate, means for connecting said pulse generator to said counter so that the pulse output from said pulse generator is applied to said counter and causes said counter to count, said counter generating an output signal when the limit of its count is reached so that the time between output signals from said counter is determined by the value of the word loaded into into said counter from said computer, a Loran pulse generator, means for connecting said Loran pulse generator to the output of said counter so that a Loran pulse is generated whenever an output signal occurs from said counter, a first register and a second register, means for connecting said first register to the output of said computer so that said computer loads said first register, means for connecting said second register to the output of said first register so that said first register transfers information stored therein into said second register, means for transferring information in said second register to said Loran pulse generator to determine the characteristics of the pulse generated thereby, and means connecting the output from said counter to an input of said computer to cause said computer to again transfer digital information into said counter and into said first register whenever a signal output is generated by said counter.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |