Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record
Patent
1990-11-13
1993-06-22
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the record
G11B 1508
Patent
active
052220036
ABSTRACT:
A computer memory backup device which utilizes magnetic tape media having aperture indications at the beginning-of-tape (bot) and the end-of-tape (eot) for accomplishing the sensing of the same is disclosed. The present invention utilizes a light pipe for directing the emitted electromagnetic radiation from an isolated source to the magnetic tape media, and focuses the radiation in proximity to the media. An integral focusing lens disposed on the exit end of the light pipe serves to converge the exiting electromagnetic radiation in this fashion. The electromagnetic radiation source, shown as a light emitting diode, is pulsed in a manner such that accuracy, as well as energy conservation, is greatly increased. A time domain filtering method is employed as a means to further enhance the system's accuracy in sensing the beginning-of-tape and end-of-tape. The devices accommodate standard aperture indications as required by ANSI specifications in both dimensional and placement aspects. When these aperture indications reach the area at which the electromagnetic radiation is being focused they permit the electromagnetic radiation to pass through the magnetic tape media at which point the electromagnetic radiation is sensed. A determination is then made appropriately as to either the beginning-of-tape or end-of-tape.
REFERENCES:
patent: 3566132 (1971-02-01), Walker
patent: 3776488 (1973-12-01), Young et al.
patent: 3931513 (1976-01-01), Germain
patent: 4343024 (1982-08-01), Kawai
patent: 4390751 (1983-06-01), Jacobson
patent: 4410148 (1983-10-01), Dunlap
patent: 4570075 (1986-02-01), Spiero
patent: 4616274 (1986-10-01), Nagaoka
patent: 4631618 (1986-12-01), Ozawa et al.
patent: 4740857 (1988-04-01), Ogawa
patent: 4763217 (1988-08-01), Oishi
patent: 4783022 (1988-11-01), Onmori et al.
patent: 4842177 (1989-06-01), Callender
patent: 4848698 (1989-07-01), Newell
patent: 4862305 (1989-08-01), Katagiri et al.
patent: 4901171 (1990-02-01), Urayama et al.
patent: 4918558 (1990-04-01), Igaraski et al.
Author: ANX TC X3B5; Title: Unrecorded Magnetic Mini Tape Cartridge for Information Interchange; date unknown.
Imthurn James A.
Miller Kevin L.
Richards Alan J.
Colorado Memory Systems
Tupper Robert S.
LandOfFree
Optical tape position sensing system for magnetic tape media in does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical tape position sensing system for magnetic tape media in , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical tape position sensing system for magnetic tape media in will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1444360