Timed Validation Device
Original Publication Date: 1990-Dec-01
Included in the Prior Art Database: 2005-Mar-17
McLean, JG: AUTHOR [+3]
A timed validation device (TVD) is described whereby visual and/or an audio indication readily provides validation identification to individuals or items for a specific period of time.
Timed Validation Device
validation device (TVD) is described whereby
visual and/or an audio indication readily provides validation
identification to individuals or items for a specific period of time.
The TVD is
intended to be used in applications which required
identification for specific periods of time. For example, it can
replace paper badges usually given as identification for access to
restricted areas. Since paper badges can easily be altered, or
counterfeited, a logo screen on the TVD quickly shows visual validity
of identification involved. The TVD can also be applied to
materials, such as rental VCR tapes, library books, or other
time-loaned materials, to easily verify return within a due date.
Typical applications for the device can be as a temporary badge for
individuals or applied to items to verify on-time delivery.
The TVD, as
shown in Fig. 1, consist of three basic parts:
logo screen 10; time integrated circuitry 11; and battery unit 12.
The device is a sealed unit intended to be used only one time.
Peel-off adhesive applied to the back of battery unit 12 enables the
device to be placed onto an individual's clothing or onto an item.
However, when the TVD is removed, small wires within the adhesive
coating cause the device to self-destruct. Also, the device becomes
unusable when the pre-programmed time has expired. The concept can
be used to provide complex versions of the TVD, such as to provide
various patterns of blinking which could be read by a wand, or other
devices, to facilitate multiple security levels, delivery routes,
10 is the display identification unit constructed
of a plastic lens over a liquid crystal device (LCD) or
light-emitting diode (LED). The plastic lens is so constructed so as
to enable the logo to be seen from a range of angles.
Time-integrated circuitry 11 is designed to activate logo screen 10
when the TVD is first applied to indicate identification, or after a
certain period of time to indicate a violation has occurred. A small
beeper (not shown) can also be incorporated to provide audible
recognition. Fig. 2 is a schematic of the circuitry involved. Time
start loop 13 extends outside of the TVD to provide activation of the
unit. When loop 13 is broken, current is allowed to flow through
transistor 14 to fuse 15 and to logo screen 10.