US3922530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic stripe reading head
Assignee: DBS Inc
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Filing: 1974-04-19
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Granted: 1975-11-25
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Expires: 1994-04-19
Abstract
Abstract The specification and drawings disclose an apparatus particularly suited for reading the magnetic stripe on a credit card. The disclosed apparatus includes a magnetic reading head mounted on a driven carriage. The carriage is driven by a lead screw drivingly connected with a synchronous motor. The drive connection between the lead screw and the motor includes a first, light-weight pulley carried on the motor shaft and a second relatively heavy pulley-flywheel combination carried on the lead screw. A resilient elastic belt drivingly interconnects the two pulleys. It should be carefully noted that the motor pulley is insignificant in weight and does not serve as a flywheel.
Inventors
- 👤 Anton Z Zupancic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:43
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/01; G06K7/015
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
117 words
Apparatus for driving a first member magnetic stripe encoded identification card and a second member read head in a transversely relative motion substantially free of speed variations, said apparatus including: a rotary element adapted to impart a driving force to at least one of said first and second members; a heavy flywheel pulley drivingly connected with said rotary drive element; a permanent magnet synchrOnous motor having a pulley of little mass in comparison to said flywheel pulley carried on the output shaft thereof; and, an elastic belt drivingly interconnecting said lightweight pulley and said pulley-flywheel; whereby, a synchronous motor having a cogging character may be caused to deliver an average and uniform drive to said drive shaft.
Claim 2
Dependent Claim
117 words
Apparatus for driving a first member magnetic stripe encoded identification card and a second member read head in a transversely relative motion substantially free of speed variations, said apparatus including: a rotary element adapted to impart a driving force to at least one of said first and second members; a heavy flywheel pulley drivingly connected with said rotary drive element; a permanent magnet synchrOnous motor having a pulley of little mass in comparison to said flywheel pulley carried on the output shaft thereof; and, an elastic belt drivingly interconnecting said lightweight pulley and said pulley-flywheel; whereby, a synchronous motor having a cogging character may be caused to deliver an average and uniform drive to said drive shaft.
Claim 3
Dependent Claim
14 words
The apparatus of claim 1 wherein said rotary drive element comprises a lead screw.
Claim 4
Dependent Claim
20 words
The apparatus as defined in claim 2 including a carriage driven by said lead screw and carrying said second member.
Claim 5
Dependent Claim
25 words
The apparatus as defined in claim 3 including a spring assembly adapted to maintain said carriage under a continuous bias relative to said lead screw.
Claim 6
Dependent Claim
17 words
The apparatus as defined in claim 1 wherein said elastic belt comprises a stretchable, round section 0-ring.
Claim 7
Dependent Claim
18 words
The apparatus as defined in claim 1 wherein said second member comprises a magnetic gap type reading head.
Claim 8
Dependent Claim
33 words
The apparatus as defined in claim 3 wherein said carriage is guided for movement on said lead screw by a guide rod extending parallel to said lead screw and slidably engaging said carriage.
Claim 9
Dependent Claim
27 words
The apparatus as defined in claim 7 including a spring assembly for applying a continuous bias to said carriage in a direction parallel to said lead screw.
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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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |