US3619618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser system for controlled guidance of mobile machine
Assignee: Siemens AG
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Filing: 1970-03-06
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Granted: 1971-11-09
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Expires: 1990-03-06
Abstract
Abstract A receiver affixed to a mobile machine comprises at least two spaced photosensitive units, positioned transversely to a reference plane formed by a flared modulated laser guide beam, on on each side of the reference plane. An initial amplifier having a variable load is connected to the photosensitive units and a difference amplifier is connected to the amplifier. The difference amplifier varies the load of the initial amplifier so that saturation of such amplifier is avoided at strong intensities of the laser beam.
Inventors
- 👤 Jurgen Thorn
- 👤 Horst Moritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:31
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/021; G05D1/0231; G05D1/0234; G05D1/0236
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
157 words
A laser system for the controlled guidance of a mobile machine in a reference plane, said system comprising laser apparatus producing a guide beam flared in a reference plane; and receiving means affixed to a mobile machine, said receiving means comprising two spaced photosensitive units positioned transversely to said reference plane, on each side of said reference plane, and a pair of initial amplifier stages and final amplifier stages each one of said pair connected to the output of a corresponding one of said photosensitive units, a control circuit comprising a difference amplifier connected between the outputs of said final amplifier stages and the inputs thereof for preventing the saturation of said final amplifier stages, said difference amplifier being connected to said final amplifier stages in a manner whereby deviation of the mobile machine from said reference plane produces an output control signal of said difference amplifier for guiding the mobile machine back into said reference plane.
Claim 2
Dependent Claim
157 words
A laser system for the controlled guidance of a mobile machine in a reference plane, said system comprising laser apparatus producing a guide beam flared in a reference plane; and receiving means affixed to a mobile machine, said receiving means comprising two spaced photosensitive units positioned transversely to said reference plane, on each side of said reference plane, and a pair of initial amplifier stages and final amplifier stages each one of said pair connected to the output of a corresponding one of said photosensitive units, a control circuit comprising a difference amplifier connected between the outputs of said final amplifier stages and the inputs thereof for preventing the saturation of said final amplifier stages, said difference amplifier being connected to said final amplifier stages in a manner whereby deviation of the mobile machine from said reference plane produces an output control signal of said difference amplifier for guiding the mobile machine back into said reference plane.
Claim 3
Dependent Claim
75 words
A laser system as claimed in claim 1, wherein said control circuit comprises a pair of variable load means each one of said pair connected to a corresponding one of the initial and final amplifier stages for varying the load thereof, and a difference amplifier having a pair of inputs each connected to the output of each of said final amplifier stages and an output connected in common to each of said variable load means.
Claim 4
Dependent Claim
33 words
A laser system as claimed in claim 2, wherein each of said variable load means is connected to a common point between the corresponding initial amplifier stage and the corresponding final amplifier stage.
Claim 5
Dependent Claim
43 words
A laser system as claimed in claim 3, wherein said difference amplifier includes an adder for adding the output signals of each of said final amplifier stages and supplying the sum of said signals in common to both of said variable load means.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |