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6577458 |
Memo tape recorder and reader system and method
There is provided a system and method for the recordation an audio message, whereby the system converts the recorded message to a digital format, and stores the message on a record medium ( 18 )...
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5258603 |
Magnetic reading head having a tapered reading opening and/or a tapered reading stylus
The invention concerns a reading head with a tapered reading opening and/or a tapered reading stylus for reading bar-type, especially passive magnetic information on a data carrier. A high...
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4687962 |
Ultrasonic horn driving apparatus and method with active frequency tracking
The actual resonant frequency of an ultrasonic horn is tracked actively while the horn is operating in a working environment, such as in a clinical analyzer where the horn is partly immersed in a...
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4541028 |
Hand-held transducing device for insertable records
A hand-held transducing device for magnetically recording upon and playing from stationary records of a type adapted to be carried on back of a photograph or the like employs a rotating head for...
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4328519 |
Reading secure magnetic documents
An apparatus for reading magnetic documents, comprising an inductively wound gapped core forming part of a tuned circuit which is driven at its resonant frequency, and a means for producing an...
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4128851 |
Hand held magnetic card encoder
A manually manipulatable magnetic card encoder containing substantially all of the apparatus and wiring required to encode magnetic spots on a magnetic card key or the like. The encoder is...
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4101905 |
Method for writing and viewing magnetic human readable characters and viewing means therefor
A multi-track magnetic recording head is used to record data in human readable form on a magnetic track on a record medium. A viewer, having a viewing window containing microencapsulated...
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4044393 |
Hand guided tape player
The device is configured so that it is easily held in the user's hand and thereby guided along a strip of recording tape attached to a card, sheet of paper or plastic sheet and having a...
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3925814 |
Sound card and sound apparatus suitable for multi-channel use
This invention relates to audio apparatus in which a card with a magnetic sound track, or other type sound track, extending parallel to an edge of the card and simple manual operated means produce...
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3890645 |
Magnetic transducer
A handheld magnetic transducer comprises a magnetic core structure having a reading portion or keeper. The keeper has a curved surface. The gap of the reading means is in the form of a helix in...
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3831193 |
BI-DIRECTIONAL SCANNING OF A PHASE ENCODED MAGNETIC MESSAGE
A magnetic reproducing system includes logic control circuitry which is responsive to the slope polarity of the transduced data signal just prior to the first data peak of the signal so as to...
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3767208 |
SOUND CARD AND SOUND APPARATUS FOR MULTI-CHANNEL USE
This invention relates to audio apparatus in which a card having a magnetic sound track, or other type sound track, extends parallel to an edge of the card and simple manual operated means produce...
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3723669 |
HAND HELD MAGNETIC READER
A compact magnetic tape reader for binary coded magnetic tapes or merchandise labels. The reader includes an electrostatically and magnetically shielded transducer wound with a symmetrical center...
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3710362 |
HAND HELD TRANSDUCER INSENSITIVE TO ANGULAR ORIENTATION
A pen-like device for reading magnetically coded data is shown, having a magnetic transducer mounted at one end thereof. The magnetic transducer has an outer, tubular core piece having a conical...
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3678218 |
HANDHELD TRANSDUCER OPERATIONAL STATE AND DIRECTIONAL INDICATOR
A handheld magnetic transducer comprises a gun-shaped housing having a directional arrow on one surface. The arrow is illuminated by a light within the housing indicating the operating state of the...
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3674943 |
HANDHELD MAGNETIC TRANSDUCER WITH TIP MEMBERS HAVING A HEMISPHERICAL READING PORTION
A handheld magnetic transducer comprises a gun-shaped housing having a directional arrow on one surface. The arrow is illuminated by a light within the housing indicating the operating state of the...
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3673350 |
MAGNETIC TRANSDUCER ARMATURE
A handheld magnetic transducer comprises a gun-shaped housing having a directional arrow on one surface. The arrow is illuminated by a light within the housing indicating the operating state of the...
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3668333 |
HANDHELD TRANSDUCER OPERATING STATE INDICATOR
A handheld magnetic transducer comprises a gun-shaped housing having a directional arrow on one surface. The arrow is illuminated by a light within the housing indicating the operating state of the...
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3644685 |
MANUAL MAGNETIC RECORDER
A handheld device for recording magnetic cueing and starting signal information on a magnetizable surface such as used on motion-picture film. A recording head is passed over the film and across...
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3529101 |
INSTRUMENT USING INTERMEDIATE STORAGE FOR REPRODUCING PRE-RECORDED INFORMATION
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3521007 |
HAND-HELD APPARATUS FOR RECORDING AND REPRODUCING ELECTROMAGNETIC IMPULSES PRINTED ON PAPER AND PRINTED BOOK
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3376551 |
Magnetic writing devices
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3373250 |
Hand held multi-channel magnetic tape eraser
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3221315 |
Magnetic recording medium utilizing microscopic capsules containing magnetic material
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3120001 |
Magnetic transducer
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3070668 |
Hand recording apparatus
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2994853 |
Information record reading system
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2936342 |
Sound reproducing head
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2917588 |
Apparatus for recording and playback
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3609885 |
Title is not available
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