EP0286842A2
Expired / Lapsed
EP
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Multichannel type head
Assignee: Glory Ltd
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Filing: 1988-03-11
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Granted: —
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Expires: 2008-03-11
Abstract
Abstract Sensors are widely used to read magnetic data and to read the magnetic and the optical patterns printed on notes and so on. Since this invention multichannel type head has plural magnetic cores (11-19) arranged in a row and a cancellation core (20) for noise removal, the head can detect magnetic characteristics as a whole in a stationary state without depending on the relative speed of the magnetic member with the head, and therefore is least affected by noises. Since one cancellation core is shared by plural magnetic cores, the structure as a whole becomes simple, and the manufacture cost can be remarkably reduced. Since a magnetic head is combined with optical fibers in an integral structure according to this invention, it can read the magnetic patterns and the optical patterns on the same location simultaneously by a parallel operation.
Inventors
- 👤 Saishi Naito
- 👤 Masaaki Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 20:34
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/08; G06K7/082; G06K7/087
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
78 words
A multichannel type magnetic head comprising plural magnetic cores arranged in a row which are wound with primary coils and secondary coils respectively, a cancellation core which is wound with the primary coil for cancellation and with the secondary coil for cancellation, and a member which integrally connects said plural magnetic cores and said cancellation cores, which is characterized in that detection planes of said magnetic cores are arranged in a row opposed to an object of detection.
Claim 2
Dependent Claim
78 words
A multichannel type magnetic head comprising plural magnetic cores arranged in a row which are wound with primary coils and secondary coils respectively, a cancellation core which is wound with the primary coil for cancellation and with the secondary coil for cancellation, and a member which integrally connects said plural magnetic cores and said cancellation cores, which is characterized in that detection planes of said magnetic cores are arranged in a row opposed to an object of detection.
Claim 3
Dependent Claim
35 words
A multichannel type magnetic head as claimed in Claim 1, wherein said cancellation core is provided in the number of one either at an end or at a position midway of said plural magnetic cores.
Claim 4
Dependent Claim
28 words
A multichannel type magnetic head as claimed in Claim 1, wherein said cancellation core is plural and which are provided at an end of said plural magnetic cores.
Claim 5
Dependent Claim
39 words
A multichannel type magnetic head as claimed in Claim 1 or 2, wherein said cancellation core and said plural magnetic cores are identical in shape and material, and said cancellation core is not responsive to said object of detection.
Claim 6
Dependent Claim
32 words
A multichannel type magnetic head as claimed in any of claims 1 to 4, wherein the primary coils of said magnetic cores and the cancellation core are excited with sine wave signals.
Claim 7
Dependent Claim
101 words
A multichannel type head comprising an arrangement of plural magnetic cores which are wound with primary coils and with secondary coils respectively, and which are provided with gaps at an interval on detection planes thereof, a cancellation core which is wound with primary coil for cancellation and with secondary coil for cancellation, a member which integrally connects said plural magnetic cores and said cancellation cores, and optical fibers arranged in each gap which is characterized in that the detection planes of said magnetic cores and an end of said optical fibers are opposed as a row to an object of detection.
Claim 8
Dependent Claim
101 words
A multichannel type head comprising an arrangement of plural magnetic cores which are wound with primary coils and with secondary coils respectively, and which are provided with gaps at an interval on detection planes thereof, a cancellation core which is wound with primary coil for cancellation and with secondary coil for cancellation, a member which integrally connects said plural magnetic cores and said cancellation cores, and optical fibers arranged in each gap which is characterized in that the detection planes of said magnetic cores and an end of said optical fibers are opposed as a row to an object of detection.
Claim 9
Dependent Claim
46 words
A multichannel type head as claimed in Claim 6, wherein said optical fibers are divided into those for projecting light and those for receiving light, optical fibers of each type are arranged in a row, and the arrangements of said optical fibers are placed in layers.
Claim 10
Dependent Claim
42 words
A multichannel type head as claimed in Claim 7, wherein an end of the optical fibers for light projection is led to a light source while an end of the optical fibers for said receiving light is fixed with a reader member.
Claim 11
Dependent Claim
26 words
A multichannel type head as claimed in Claim 8, wherein photo-sensors are provided on the side of an end of said optical fibers for receiving light.
Claim 12
Dependent Claim
37 words
A multichannel type head as claimed in Claim 6, wherein said optical fibers are classified into those for projecting light and those for receiving light, and each type of optical fibers is arranged alternately in one row.
Claim 13
Dependent Claim
30 words
A multichannel type head as claimed in any if claims 6 to 10, wherein spacers are provided between said optical fiber ends and said detection planes arranged in said gaps.
Claim 14
Dependent Claim
27 words
A multichannel type head as claimed in Claim 11, wherein the height of said spacers is determined in a manner to allow sufficient detection of optical patterns.
Claim 15
Dependent Claim
20 words
A multichannel type head as claimed in claim 10 or 11, wherein hard glass members are buried in said gaps.
References Cited (Backward Citations)
No citation records indexed.
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