US3654435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically readable bar and code
Assignee: International Business Machines Corp
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Filing: 1970-06-02
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Granted: 1972-04-04
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Expires: 1990-06-02
Abstract
Abstract A code formed of bars having one type of bar for one piece of information and another type of bar for another piece of information with the bars being formed of magnetizable material and in which the ratio of the amplitude of the electromagnetic wave produced by the leading edges of both types of bars being moved past a character reading system is substantially increased by slanting or inclining the leading edge of one type of bar with respect to the movement while maintaining the leading edge of the other type of bar perpendicular to the movement.
Inventors
- 👤 Angelo Vaccaro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:46
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/06187
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
145 words
In a code formed of a plurality of bars with there being two types of bars, said types of bars being intermingled differently for each different character represented in the code, said bars being formed with magnetizable particles and adapted to be automatically read by a character reading system to produce an electrical representation of the characters by storing one binary state for one type of bar and the other binary state for the other type of bar and with the system differentiating between the two types of bars by the amplitude of the voltage spike produced by reading the similar edges of each type of bar, the improvement comprising the shape of the similar edge of one type of bar being different than that of the other type of bar to produce an amplitude of a voltage spike substantially less than the other bar.
Claim 2
Dependent Claim
145 words
In a code formed of a plurality of bars with there being two types of bars, said types of bars being intermingled differently for each different character represented in the code, said bars being formed with magnetizable particles and adapted to be automatically read by a character reading system to produce an electrical representation of the characters by storing one binary state for one type of bar and the other binary state for the other type of bar and with the system differentiating between the two types of bars by the amplitude of the voltage spike produced by reading the similar edges of each type of bar, the improvement comprising the shape of the similar edge of one type of bar being different than that of the other type of bar to produce an amplitude of a voltage spike substantially less than the other bar.
Claim 3
Dependent Claim
40 words
The invention as defined in claim 1 in which the shape of the edge of the one bar is made to more gradually increase in height traverse to the path of movement than the leading edge of the other bar.
Claim 4
Dependent Claim
74 words
The invention as defined in claim 1 in which the one type of bar is shorter than the other type of bar transverse to the movement of the bars relative to the character reading system, in which the bars have a common point aligned with the movement, in which the one bar has its similar edge gradually increasing in height transverse to the movement while the other bar has an abrupt increase in height.
Claim 5
Dependent Claim
47 words
The invention as defined in claim 3 in which there is a space between adjacent other bars and in which the beginning of the similar edge of the one bar is positioned closely adjacent the adjacent edge of the preceding bar to essentially eliminate any gap therebetween.
Claim 6
Dependent Claim
42 words
The invention as defined in claim 4 in which the beginning of the similar edge of the one bar is at one end of the bar and the edge increases linearly heightwise along a line that slants with respect to the movement.
Claim 7
Dependent Claim
33 words
The invention as defined in claim 4 in which the beginning of the similar edge of the one bar is intermediate the height of the one bar and the edge increases divergingly therefrom.
Claim 8
Dependent Claim
37 words
The invention as defined in claim 1 in which each bar has another similar edge transverse to the movement and in which the another similar edge of both bars is essentially linear and perpendicular to the movement.
References Cited (Backward Citations)
US2936112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |