US4839508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Card reader
Assignee: Emhart Industries Inc
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Filing: 1987-09-23
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Granted: 1989-06-13
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Expires: 2007-09-23
Abstract
Abstract A magnetic card reader for reading data for electronic locks or the like is provided. The reader "reads" data both when the card is inserted and upon withdrawal, thereby decreasing the chances of misreading the data.
Inventors
- 👤 George Frolov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:18
CPC Classifications
G; G06; G06K; G06K7/00; G07; G07C; G07C9/00; G07C9/00174; G07C9/00658; G07C9/00722; G06K7/08; G06K7/082; G06K7/083; G06K7/084
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
79 words
A magnetic card reader comprises: a cover; a slot in said cover to accept a card; a magnetic reading head movably mounted within said cover; a first switch means positioned within said cover to initiate entry reading of the card; a second switch means positioned within said cover to terminate entry reading of the card and to initiate withdrawal reading of the card; spring means responsive to insertion of said card to actuate said first and second switch means.
Claim 2
Dependent Claim
79 words
A magnetic card reader comprises: a cover; a slot in said cover to accept a card; a magnetic reading head movably mounted within said cover; a first switch means positioned within said cover to initiate entry reading of the card; a second switch means positioned within said cover to terminate entry reading of the card and to initiate withdrawal reading of the card; spring means responsive to insertion of said card to actuate said first and second switch means.
Claim 3
Dependent Claim
17 words
The card reader of claim 1 wherein said spring means urges said read head toward said card.
Claim 4
Dependent Claim
15 words
The card reader of claim 1 wherein said first and second switch means comprise microswitches.
Claim 5
Dependent Claim
64 words
A spring for a magnetic card reader which comprises: a base and two arms attached thereto; one arm being adapted to bias a read head toward a card; the other arm being adapted to actuate two microswitches; the first microswitch being actuated as the card initially enters the reader and the second microswitch being actuated when the card reaches the end of its travel.
Claim 6
Dependent Claim
64 words
A spring for a magnetic card reader which comprises: a base and two arms attached thereto; one arm being adapted to bias a read head toward a card; the other arm being adapted to actuate two microswitches; the first microswitch being actuated as the card initially enters the reader and the second microswitch being actuated when the card reaches the end of its travel.
Claim 7
Dependent Claim
19 words
The spring according to claim 4 wherein said arm adapted to bias the read head is rectangular in shape.
Claim 8
Dependent Claim
32 words
The spring according to claim 4 wherein said arm adapted to actuate the microswitches is shaped like a small h and is attached to the base at the lower left portion thereof.
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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) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |