US3763574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational apparatus
Assignee: Individual
•
Filing: 1972-03-24
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Granted: 1973-10-09
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Expires: 1992-03-24
Abstract
Abstract A set or assortment of cards bears question material, together with multiple choice answers. The card is placed face up on a surface containing closely spaced opposed conductors of an electric signalling circuit. At the rear of the card there is a recess in registry with the correct answer and containing an electrically conductive bottom wall, so that the electrically conductive material is normally spaced above the electrical conductors. When an answerer presses his finger upon a correct answer the electrically conductive bottom wall of the recess is pressed against opposed electrical conductors to close an audible or visual indicating circuit.
Inventors
- 👤 J Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:13
CPC Classifications
G; G09; G09B; G09B7/00; G09B7/06; G09B7/066
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
150 words
In an educational device of the question and answer type, in combination, a surface having a multiplicity of closely spaced electrical conductors with alternate conductors comprising opposed terminals in an electrical indicating circuit, an answer card element bearing at its front face indicia in the nature of a series of multiple choice answers, said card comprising at least three laminations, the front and rear laminations comprising electrically non-conductive material and an intermediate lamination comprising electrically conductive material, said rear lamination having a perforation therethrough in registry with a correct answer at the front face of said card, whereby when the card is placed face up on said surface in any random position said conductive lamination is spaced above said conductors by said rear lamination but when a finger is pressed on the correct answer said conductive lamination is pressed against at least two adjacent conductors to close said indicating circuit.
Claim 2
Dependent Claim
150 words
In an educational device of the question and answer type, in combination, a surface having a multiplicity of closely spaced electrical conductors with alternate conductors comprising opposed terminals in an electrical indicating circuit, an answer card element bearing at its front face indicia in the nature of a series of multiple choice answers, said card comprising at least three laminations, the front and rear laminations comprising electrically non-conductive material and an intermediate lamination comprising electrically conductive material, said rear lamination having a perforation therethrough in registry with a correct answer at the front face of said card, whereby when the card is placed face up on said surface in any random position said conductive lamination is spaced above said conductors by said rear lamination but when a finger is pressed on the correct answer said conductive lamination is pressed against at least two adjacent conductors to close said indicating circuit.
Claim 3
Dependent Claim
40 words
Apparatus according to claim 1 including a container with said surface comprising the top surface of said container, said electrical indicating circuit being housed in said container and the latter being adapted to contain an assortment of said card elements.
Claim 4
Dependent Claim
24 words
Apparatus according to claim 1 wherein the front face of said card element bears indicia posing a question related to said multiple choice answers.
Claim 5
Dependent Claim
23 words
Apparatus according to claim 1 wherein said indicating circuIt includes a sounding device activated upon closure of said circuit across said alternate conductors.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |