Method for making an improved magnetic encoding device

Patent · Thu Jan 01 00:00:00 EST 1981

OSTI ID:863759

Fox, Richard J ^[1]

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1. Oak Ridge, TN

A magnetic encoding device and method for making the same are provided for use as magnetic storage mediums in identification control applications which give output signals from a reader that are of shorter duration and substantially greater magnitude than those of the prior art. Magnetic encoding elements are produced by uniformly bending wire or strip stock of a magnetic material longitudinally about a common radius to exceed the elastic limit of the material and subsequently mounting the material so that it is restrained in an unbent position on a substrate of nonmagnetic material. The elements are spot weld attached to a substrate to form a binary coded array of elements according to a desired binary code. The coded substrate may be enclosed in a plastic laminate structure. Such devices may be used for security badges, key cards, and the like and may have many other applications.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4242789
• OSTI ID: 863759
• Country of Publication: United States
• Language: English

Related Subjects

method
improved
magnetic
encoding
device
provided
storage
mediums
identification
control
applications
output
signals
reader
shorter
duration
substantially
magnitude
prior
elements
produced
uniformly
bending
wire
strip
stock
material
longitudinally
common
radius
exceed
elastic
limit
subsequently
mounting
restrained
unbent
position
substrate
nonmagnetic
spot
weld
attached
form
binary
coded
array
according
desired
code
enclosed
plastic
laminate
structure
devices
security
badges
key
cards
output signals
output signal
magnetic material
storage medium
binary coded
shorter duration
magnetic encoding
storage mediums
improved magnetic
encoding device
/29/235/360/365/