US3564155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatically operated write lockout means for magnetic recorder
Assignee: Honeywell Inc
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Filing: 1964-03-09
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Granted: 1971-02-16
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Expires: 1984-03-09
Abstract
Abstract Write lockout protection for a magnetic record is provided by having a lockout device removably carried with the record so as to engage, when the record is operatively installed on the recording transport, an actuating element that operates a pneumatic valve to activate pneumatically the write disabling circuit. The pneumatic valve serves a dual function of controlling pneumatic clamping of the record to the transport.
Inventors
- 👤 Robert A Pendleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:02
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/32; G11B15/02; G11B15/04
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
150 words
In a magnetic tape handling apparatus of the type including data writing and erasing control circuits, the improvement of interlock means for preventing the accidental writing and erasing of data on the tape comprising a reel, a support hub assembly for said reel, clamping means on said support hub assembly for clamping said reel to said support hub assembly for rotation therewith, a source of fluid pressure in communication with said clamping means, pneumatic switching means for the controlling of the writing and erasing circuits connected to said source of fluid pressure and said clamping means, and interlock means on said supply reel adapted to maintain said clamping means in interlocked condition when the supply reel is operatively positioned on said support hub assembly for venting said source of fluid pressure to place said pneumatic switching means in a preselected operative condition to control said writing and erase control circuits.
Claim 2
Dependent Claim
150 words
In a magnetic tape handling apparatus of the type including data writing and erasing control circuits, the improvement of interlock means for preventing the accidental writing and erasing of data on the tape comprising a reel, a support hub assembly for said reel, clamping means on said support hub assembly for clamping said reel to said support hub assembly for rotation therewith, a source of fluid pressure in communication with said clamping means, pneumatic switching means for the controlling of the writing and erasing circuits connected to said source of fluid pressure and said clamping means, and interlock means on said supply reel adapted to maintain said clamping means in interlocked condition when the supply reel is operatively positioned on said support hub assembly for venting said source of fluid pressure to place said pneumatic switching means in a preselected operative condition to control said writing and erase control circuits.
Claim 3
Dependent Claim
135 words
In a magnetic tape handling apparatus of the type including data writing and erasing circuits, the improvement of interlock means for preventing the accidental writing and erasing of data on the tape comprising a reel, a support hub assembly for said reel, selectively actuatable valve means connected to said support hub assembly, a source of fluid pressure in pressure communication with said valve means, pneumatic Switching means for controlling the writing and erasing circuits connected to said source of fluid pressure and said valve means, and interlock means on said reel adapted to maintain said valve means open when the reel is operatively positioned on said support hub assembly for venting said source of fluid pressure to place said pneumatic switching means in a preselected operative condition, to control said writing and erasing control circuits.
Claim 4
Dependent Claim
135 words
In a magnetic tape handling apparatus of the type including data writing and erasing circuits, the improvement of interlock means for preventing the accidental writing and erasing of data on the tape comprising a reel, a support hub assembly for said reel, selectively actuatable valve means connected to said support hub assembly, a source of fluid pressure in pressure communication with said valve means, pneumatic Switching means for controlling the writing and erasing circuits connected to said source of fluid pressure and said valve means, and interlock means on said reel adapted to maintain said valve means open when the reel is operatively positioned on said support hub assembly for venting said source of fluid pressure to place said pneumatic switching means in a preselected operative condition, to control said writing and erasing control circuits.
Claim 5
Dependent Claim
16 words
having a normal position where it applies a nonactivating pneumatic signal to said control means, and
Claim 6
Dependent Claim
16 words
having a normal position where it applies a nonactivating pneumatic signal to said control means, and
Claim 7
Dependent Claim
32 words
engaged by said actuating element on a record-supporting member received on said carriage means and moved thereby to an actuating position wherein it applies an activating pneumatic signal to said control means.
Claim 8
Dependent Claim
32 words
engaged by said actuating element on a record-supporting member received on said carriage means and moved thereby to an actuating position wherein it applies an activating pneumatic signal to said control means.
Claim 9
Dependent Claim
126 words
In a magnetic tape handling apparatus of the type including data writing and erasing circuits, the combination of a reel, a support hub assembly for said reel, a selectively actuable fluid pressure valve in said support hub assembly, a source of fluid pressure in communication with said support hub assembly valve, pneumatic switching means for controlling the data writing and erasing circuits connected to said source of fluid pressure and said support hub assembly valve, and interlock means on said reel adapted to maintain said valve open when the reel is operatively positioned on said support hub assembly for venting said source of fluid pressure to place said pneumatic switching means in a preselected operative condition, whereby said writing and erasing control circuits may be controlled.
Claim 10
Dependent Claim
126 words
In a magnetic tape handling apparatus of the type including data writing and erasing circuits, the combination of a reel, a support hub assembly for said reel, a selectively actuable fluid pressure valve in said support hub assembly, a source of fluid pressure in communication with said support hub assembly valve, pneumatic switching means for controlling the data writing and erasing circuits connected to said source of fluid pressure and said support hub assembly valve, and interlock means on said reel adapted to maintain said valve open when the reel is operatively positioned on said support hub assembly for venting said source of fluid pressure to place said pneumatic switching means in a preselected operative condition, whereby said writing and erasing control circuits may be controlled.
Claim 11
Dependent Claim
90 words
In a magnetic tape handling apparatus of the type including data writing and erasing control circuits, the improvement comprising a reel, a support hub assembly for said reel, valve means on said support hub assembly in communication with a source of fluid pressure and the writing and erasing control circuits, and interlock means on said reel adapted to maintain said valve means open when the supply reel is operatively positioned on said support hub assembly for venting said source of fluid pressure to control said writing and erasing control circuits.
Claim 12
Dependent Claim
90 words
In a magnetic tape handling apparatus of the type including data writing and erasing control circuits, the improvement comprising a reel, a support hub assembly for said reel, valve means on said support hub assembly in communication with a source of fluid pressure and the writing and erasing control circuits, and interlock means on said reel adapted to maintain said valve means open when the supply reel is operatively positioned on said support hub assembly for venting said source of fluid pressure to control said writing and erasing control circuits.
Claim 13
Dependent Claim
92 words
Magnetic storage apparatus for use with a magnetic tape reel adapted to have a write lockout ring mounted thereon during readout operations, said apparatus comprising in combination: A. a tape transport including means for receiving the magnetic tape reel, B. a vacuum pump associated with said tape transport, C. a write lockout switch also associated with said tape transport, and D. means on said tape transport connected with said vacuum pump and including means for engaging said write lockout ring on the tape reel for actuating said switch to an operative position.
Claim 14
Dependent Claim
92 words
Magnetic storage apparatus for use with a magnetic tape reel adapted to have a write lockout ring mounted thereon during readout operations, said apparatus comprising in combination: A. a tape transport including means for receiving the magnetic tape reel, B. a vacuum pump associated with said tape transport, C. a write lockout switch also associated with said tape transport, and D. means on said tape transport connected with said vacuum pump and including means for engaging said write lockout ring on the tape reel for actuating said switch to an operative position.
Claim 15
Dependent Claim
93 words
Transport apparatus for transferring information relative to a magnetic record during movement of the record relative to the transport apparatus, said transport apparatus being arranged for use with a record-supporting member carrying an actuating element during operation in which information stored on the record is not to be altered, said apparatus comprising: A. carriage means arranged to receive said record-supporting member and to impart said relative movement thereto, B. pneumatically actuatable control means arranged when activated to prevent said transport apparatus from altering information stored on said record, and C. pneumatic valve means:
Claim 16
Dependent Claim
93 words
Transport apparatus for transferring information relative to a magnetic record during movement of the record relative to the transport apparatus, said transport apparatus being arranged for use with a record-supporting member carrying an actuating element during operation in which information stored on the record is not to be altered, said apparatus comprising: A. carriage means arranged to receive said record-supporting member and to impart said relative movement thereto, B. pneumatically actuatable control means arranged when activated to prevent said transport apparatus from altering information stored on said record, and C. pneumatic valve means:
Claim 17
Dependent Claim
52 words
Transport apparatus as defined in claim 6: A. in which said valve means is mounted with said carriage means for movement with said record-supporting member relative to said transport apparatus, and B. further comprising pneumatic coupling means providing pneumatic communication between said control means and said valve means during said relative movement.
Claim 18
Dependent Claim
42 words
Transport apparatus as defined in claim 6 in which: A. said carriage means is arranged selectively to clamp said supporting membeR thereto pneumatically for undergoing said relative movement therewith, and B. said valve means is further arranged to control said pneumatic clamping.
Claim 19
Dependent Claim
43 words
Transport apparatus as defined in claim 8 further comprising push-to-release latching means for said support member arranged on said carriage means and connected to move said valve means for both said latching operation and said lockout operation that prevents alteration of recorded information.
Claim 20
Dependent Claim
102 words
Magnetic storage apparatus for use with a magnetic tape reel adapted to have a write lockout ring mounted thereon during readout operations, said apparatus comprising in combination: A. a tape transport including means for receiving the magnetic tape reel, B. a a tape reel having a write lockout ring, C. a vacuum pump associated with said tape transport, D. a write lockout switch also associated with said tape transport, and E. means on said tape transport connected with said vacuum pump and including means for engaging said write lockout ring on the tape reel for actuating said switch to an operative position.
Claim 21
Dependent Claim
102 words
Magnetic storage apparatus for use with a magnetic tape reel adapted to have a write lockout ring mounted thereon during readout operations, said apparatus comprising in combination: A. a tape transport including means for receiving the magnetic tape reel, B. a a tape reel having a write lockout ring, C. a vacuum pump associated with said tape transport, D. a write lockout switch also associated with said tape transport, and E. means on said tape transport connected with said vacuum pump and including means for engaging said write lockout ring on the tape reel for actuating said switch to an operative position.
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |