US3782005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audio-visual teaching system consisting of a self propelling magnetic reading unit, sliding along magnetic tracks pre-recorded on paged sheets
Assignee: SAMER
•
Filing: 1971-10-04
•
Granted: 1974-01-01
•
Expires: 1991-10-04
Abstract
Abstract An audio-visual teaching system for rendering easier the learning of scholastic matters at any level, wherein the support of the information and/or the images consists of illustrative sheets suitably paged and the sound reproduction is obtained by a self propelling magnetic reading unit slidable with a precisely constant speed along a pre-recorded magnetic track, secured to the paged illustrative sheet.
Inventors
- 👤 A Oliveti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:13
CPC Classifications
G; G11; G11B; G11B25/00; G11B25/04; G09; G09B; G09B5/00; G09B5/06; G09B5/062
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
153 words
In an audio-visual teaching device for reproducing sound from a magnetic sound track on a sheet, including a stand for sheets to be read having on its upper face a plurality of elongated parallel slots, battery means in said stand for powering said device, and an audio low frequency amplifier in said stand; the improvement comprising a self-propelling pickup unit movable along said upper face and having an electric motor connected to said battery means, a roller that rolls on the upper sides of the edges of said slots on a horizontal axis, a flywheel coaxial with said roller and of a diameter greater than said roller, said flywheel descending into one of said slots, means drivingly interconnecting said motor and said roller and flywheel, said pickup unit having a pickup that moves along magnetic sound tracks on sheets lying on said upper face, and means electrically connecting said pickup to said amplifier.
Claim 2
Dependent Claim
153 words
In an audio-visual teaching device for reproducing sound from a magnetic sound track on a sheet, including a stand for sheets to be read having on its upper face a plurality of elongated parallel slots, battery means in said stand for powering said device, and an audio low frequency amplifier in said stand; the improvement comprising a self-propelling pickup unit movable along said upper face and having an electric motor connected to said battery means, a roller that rolls on the upper sides of the edges of said slots on a horizontal axis, a flywheel coaxial with said roller and of a diameter greater than said roller, said flywheel descending into one of said slots, means drivingly interconnecting said motor and said roller and flywheel, said pickup unit having a pickup that moves along magnetic sound tracks on sheets lying on said upper face, and means electrically connecting said pickup to said amplifier.
Claim 3
Dependent Claim
27 words
A device as claimed in claim 1, And a counterweight on said pickup unit to attain a suitable pressure of said pickup on a said sound track.
Claim 4
Dependent Claim
18 words
A device as claimed in claim 1, and a magnetic governor for controlling the speed of said motor.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |