US3824706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational device
Assignee: Individual
•
Filing: 1973-05-09
•
Granted: 1974-07-23
•
Expires: 1993-05-09
Abstract
Abstract A flexible sheet having indicia and orifices on its front. The sheet has a median conducting layer and rear orifices registerable with selected front orifices. Used with a support containing a source of power and a signal a child actuates the signal when the probe goes into the correct orifice.
Inventors
- 👤 P Scopa
- 👤 N Kelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:06
CPC Classifications
G; G09; G09B; G09B7/00; G09B7/06; G09B7/063
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
197 words
A testing device comprising in combination a support and a single, unattached indicia sheet positioned on said support; said support having a front conductive surface, a source of electrical current, a signal device, and a thin, conductive probe on a flexible, elongated lead; said source, signal device and probe being electrically connected so that electrical contact of the probe with the conductive surface actuates the signal device; said indicia sheet being positioned on said conductive surface; said sheet comprising a laminate of a front insulating layer (27) bearing indicia, a median conducting layer (26), and a rear insulating layer (25), said front layer having at least one array of a plurality of orifices associated with selected indicia; said rear layer having an orifice registerable with only one said array of front orifices, said rear orifice not being visible from the front; said sheet being further characterized in that insertion of said conductive probe into a registering front orifice causes the adjacent portion of the conductive layer to protrude through said rear orifice and contact said conductive surface with the result that said probe is in electrical connection with said conductive surface and said signal device is actuated.
Claim 2
Dependent Claim
197 words
A testing device comprising in combination a support and a single, unattached indicia sheet positioned on said support; said support having a front conductive surface, a source of electrical current, a signal device, and a thin, conductive probe on a flexible, elongated lead; said source, signal device and probe being electrically connected so that electrical contact of the probe with the conductive surface actuates the signal device; said indicia sheet being positioned on said conductive surface; said sheet comprising a laminate of a front insulating layer (27) bearing indicia, a median conducting layer (26), and a rear insulating layer (25), said front layer having at least one array of a plurality of orifices associated with selected indicia; said rear layer having an orifice registerable with only one said array of front orifices, said rear orifice not being visible from the front; said sheet being further characterized in that insertion of said conductive probe into a registering front orifice causes the adjacent portion of the conductive layer to protrude through said rear orifice and contact said conductive surface with the result that said probe is in electrical connection with said conductive surface and said signal device is actuated.
Claim 3
Dependent Claim
16 words
The testing device of claim 1 wherein the signal device can be selectively audible or visual.
Claim 4
Dependent Claim
57 words
The testing device of claim 1 wherein said sheet comprises a plurality of parallel arrays, each comprising a first indicia without an orifice and a plurality of second indicia each associated with an orifice, a selected one of said second indicia being identical with said first indicia and having its associated orifice registerable with a rear orifice.
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |