US3914548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stylus actuated electrical device and electrical kit including same
Assignee: Individual
•
Filing: 1974-03-01
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Granted: 1975-10-21
•
Expires: 1994-03-01
Abstract
Abstract Described is a stylus-actuated electrical device including a printed circuit board and an overlying flexible impression sheet, both carrying an electrically conductive pattern. The two conductive patterns are normally insulated from each other by a coating of a soft, pressure-flowable, tacky, insulating material, such as wax. When ''''writing'''' with a stylus, portions of the two conductive patterns are brought into contact with each other along the line of write, which contact is broken by separation of the impression sheet, as in a ''''Magic Slate'''' device. Both conductive patterns are in the form of discrete conductive deposits each insulated from the others on all sides by narrow interruptions, such that a conductive pathway is formed by the successive electrical contacts between the conductive patterns of the two members under the pressure of the stylus, the conductive deposits of one member bridging the interruptions of the other along the line of movement of the stylus. Also described is a kit including the stylus-actuated electrical device and a plurality of selectively insertable electrical components enabling various electrical circuits to be produced in a simple manner by drawing same with a stylus, and to be erased in an even simpler manner by merely separating the impression sheet from the printed circuit board.
Inventors
- 👤 Benjamin J Barish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:21
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/0414
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
220 words
An electrical device comprising a supporting member carrying at least one electrically conductive element, and a flexible sheet member carrying at least one electrically conductive element placeable on top of the supporting member with the two conductive elements facing each other, at least one of said members including a coating of insulating material to insulate the conductive elements from each other when the flexible sheet member is placed on top of the supporting member, said insulating coating being of a soft, pressure-flowable material which parts under the pressure of a stylus applied to the flexible sheet member to thereby bring the two conductive elements into contact with each other, said insulating coating also being tacky to hold the two conductive elements in contact with each other upon removing the pressure of the stylus, said conductive elements on both of said members being in the form of discrete conductive deposits insulated from the others on all sides by narrow interruptions between them, such that a conductive pathway is formed along the lIne of the stylus pressure by the successive electrical contacts between the conductive deposits of the two members, the conductive deposits of one member bridging the interruptions of the other along the line of movement of the stylus, said conductive pathway being erasable by the separation of the two members.
Claim 2
Dependent Claim
220 words
An electrical device comprising a supporting member carrying at least one electrically conductive element, and a flexible sheet member carrying at least one electrically conductive element placeable on top of the supporting member with the two conductive elements facing each other, at least one of said members including a coating of insulating material to insulate the conductive elements from each other when the flexible sheet member is placed on top of the supporting member, said insulating coating being of a soft, pressure-flowable material which parts under the pressure of a stylus applied to the flexible sheet member to thereby bring the two conductive elements into contact with each other, said insulating coating also being tacky to hold the two conductive elements in contact with each other upon removing the pressure of the stylus, said conductive elements on both of said members being in the form of discrete conductive deposits insulated from the others on all sides by narrow interruptions between them, such that a conductive pathway is formed along the lIne of the stylus pressure by the successive electrical contacts between the conductive deposits of the two members, the conductive deposits of one member bridging the interruptions of the other along the line of movement of the stylus, said conductive pathway being erasable by the separation of the two members.
Claim 3
Dependent Claim
17 words
An electrical device as defined in claim 1, wherein said supporting member is a printed circuit board.
Claim 4
Dependent Claim
14 words
An electrical device as defined in claim 1, wherein said insulating coating comprises wax.
Claim 5
Dependent Claim
32 words
An electrical device as defined in claim 1, wherein the discrete conductive deposits are of polygonal shape, the deposits of one member being rotationally displaced to the deposits of the other member.
Claim 6
Dependent Claim
54 words
An electrical device as defined in claim 1, further including a plurality of electrical terminals carried by the supporting member for connection to electrical components each of said terminals being connected to one of said conductive deposits of the supporting member enabling electrical circuits to be traced by the stylus to various component terminals.
Claim 7
Dependent Claim
38 words
An electrical device as defined in claim 5, wherein said electrical terminals are uniformly spaced connectors for removably receiving various electrical components in selected arrangements to enable different electrical circuits to be produced with them by the stylus.
Claim 8
Dependent Claim
58 words
A kit including the electrical device as defined in claim 6, and a plurality of electrical components having uniformly spaced electrical terminals according to the uniform spacing of the connectors in said electrical device, said components being selectively receivable in the connectors in various arrangements to enable different electrical circuits to be produced with them by the stylus.
Claim 9
Dependent Claim
32 words
A kit as defined in claim 7, wherein the supporting member is a printed circuit board and is surrounded on at least three sides by said connectors for receiving the electrical components.
Claim 10
Dependent Claim
78 words
A kit including a supporting member, a stylus-actuated device enabling various electrically conductive pathways to be formed by a stylus, a plurality of electrical components having uniformly spaced terminals, and a plurality of electrical connectors on the supporting member and uniformly spaced from each other according to the uniform spacing of the terminals on the electrical components, for removably receiving electrical components in various arrangements to enable different electrical circuits to be produced therewith by the stylus-actuated device.
Claim 11
Dependent Claim
78 words
A kit including a supporting member, a stylus-actuated device enabling various electrically conductive pathways to be formed by a stylus, a plurality of electrical components having uniformly spaced terminals, and a plurality of electrical connectors on the supporting member and uniformly spaced from each other according to the uniform spacing of the terminals on the electrical components, for removably receiving electrical components in various arrangements to enable different electrical circuits to be produced therewith by the stylus-actuated device.
Claim 12
Dependent Claim
221 words
A kit as defined in claim 9, wherein the stylus-actuated device comprises a supporting member carrying at least one electrically conductive element, and a flexible sheet member carrying at least one electrically conductive element placeable on top of the supporting member with the two conductive elements facing each other, at least one of said members including a coating of insulating material to insulate the conductive elements from each other when the flexible sheet member is placed on top of the supporting member, said insulating coating being of a soft, pressure-flowable material which parts under the pressure of a stylus applied to the flexible sheet member to thereby bring the two conductive elements into contact with each other, said insulating coating also being tacky to hold the two conductive elements in contact with each other upon removing the pressure of the stylus, said conductive elements on both of said members being in the form of discrete conductive deposits insulated from the others on all sides by narrow interruptions between them, such that a conductive pathway is formed along the line of the stylus pressure by the successive electrical contacts between the conductive deposits of one member bridging the interruptions of the other along the line of movement of the stylus, said conductive pathway being erasable by the separation of the two members.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |