Patent US4648710A successfully refreshed from Google Patents.
US4648710A
Expired / Lapsed
US
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Blind guide device
Assignee: Individual
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Filing: 1985-04-30
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Granted: 1987-03-10
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Expires: 2005-04-30
Abstract
Abstract Blind guide device is disclosed. The device comprises a light-emitting element, a first electric circuit for generating an electric pulse and causing pulsating-conduction of the light-emitting element, a first lens for converging the light emitted from the light-emitting element onto a body to be detected, a mark attached to the body to be detected for performing retroreflection action, a second lens and a photo-detector element for receiving the light reflected by the body to be detected and the mark, a second electric circuit for amplifying the output electric signal of the photo-detector element and holding an electric signal synchronized with the electric pulse, a third electric circuit for generating an electric signal whose frequency or amplitude varies in response to the output electric signal of the second electric circuit, and an electro-acoustic transducer or vibrator for converting the output electric signal of the third electric circuit into a sound or into a stimulation.
Inventors
- 👤 Itsuki Ban
- 👤 Toshiyuki Kii
- 👤 Yuji Mitsuta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:28
CPC Classifications
G; G01; G01S; G01S17/00; G01S17/88; G01S17/02; G01S17/06; Y; Y10; Y10S; Y10S135/00; Y10S135/911
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
A blind guide device comprising a light-emitting element, a first electric circuit for generating an electric pulse and causing pulsating-conduction of said light-emitting element, a first lens for converging the light emitted from said light-emitting element onto a body to be detected, a mark attached to said body to be detected for performing retroreflection action, a second lens and a photo-detector element for receiving the light reflected by said body to be detected and said mark, a second electric circuit for amplifying the output electric signal of said photo-detector element and holding an electric signal synchronized with said electric pulse, a V/F converter circuit for generating an electric signal of audible frequency whose frequency varies in response to the output electric signal of said second electric circuit, and an electro-acoustic transducer for converting the output electric signal of said converter circuit into a sound.
Claim 2
Dependent Claim
144 words
A blind guide device comprising a light-emitting element, a first electric circuit for generating an electric pulse and causing pulsating-conduction of said light-emitting element, a first lens for converging the light emitted from said light-emitting element onto a body to be detected, a mark attached to said body to be detected for performing retroreflection action, a second lens and a photo-detector element for receiving the light reflected by said body to be detected and said mark, a second electric circuit for amplifying the output electric signal of said photo-detector element and holding an electric signal synchronized with said electric pulse, a V/F converter circuit for generating an electric signal of audible frequency whose frequency varies in response to the output electric signal of said second electric circuit, and an electro-acoustic transducer for converting the output electric signal of said converter circuit into a sound.
Claim 3
Dependent Claim
22 words
A blind guide device as set forth in claim 1, wherein said mark for performing retroreflection action is composed of plural strips.
Claim 4
Dependent Claim
19 words
A blind guide device as set forth in claim 1, wherein said first lens is of a cylindrical shape.
Claim 5
Dependent Claim
149 words
A blind guide device comprising a light-emitting element, a first electric circuit for generating an electric pulse and causing pulsating-conduction of said light-emitting element, a first lens for converging the light emitted from said light-emitting element onto a body to be detected, a mark attached to said body to be detected for performing retroreflection action, a second lens and a photo-detector element for receiving the light reflected by said body to be detected and said mark, a second electric circuit for amplifying the output electric signal of said photo-detector element and holding an electric signal synchronized with said electric pulse, an oscillator circuit for generating an electric signal of audible frequency whose amplitude varies in response to the output electric signal of said second electric circuit, and an electro-acoustic transducer or vibrator for converting the output electric signal of said oscillator circuit into a sound or into a stimulation.
Claim 6
Dependent Claim
149 words
A blind guide device comprising a light-emitting element, a first electric circuit for generating an electric pulse and causing pulsating-conduction of said light-emitting element, a first lens for converging the light emitted from said light-emitting element onto a body to be detected, a mark attached to said body to be detected for performing retroreflection action, a second lens and a photo-detector element for receiving the light reflected by said body to be detected and said mark, a second electric circuit for amplifying the output electric signal of said photo-detector element and holding an electric signal synchronized with said electric pulse, an oscillator circuit for generating an electric signal of audible frequency whose amplitude varies in response to the output electric signal of said second electric circuit, and an electro-acoustic transducer or vibrator for converting the output electric signal of said oscillator circuit into a sound or into a stimulation.
Claim 7
Dependent Claim
22 words
A blind guide device as set forth in claim 4, wherein said mark for performing retroreflection action is composed of plural strips.
Claim 8
Dependent Claim
19 words
A blind guide device as set forth in claim 4, wherein said first lens is of a cylindrical shape.
References Cited (Backward Citations)
US3546467A
Cited
US3661459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |