Security time clock system

Details Security time clock system Security time clock system

1988-01-04

1989-06-06

Goldberg, E. A.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346 19, 346 20, 346 46, 346 47, 340 80, 340 82, 340 83, 340 85, 340 96, 283 95, 283 72, G01D 900

Patent

active

048375845

ABSTRACT:
System for requiring the contemporaneous application of time clock data and personal data to a time card to prevent or signal the fraudulent application of either type of data at a time which is substantially different from the other type of data, i.e., by up to about 15 minutes. The present system includes the use of time cards having at least one color-forming chemical which may be in the form of a discontinuous coating, time clock transfer elements which may be coated with at least one complimentary color-forming chemical, pre-application of a liquid coating to the data-receiving area of the time card, which liquid coating permits the desired color-forming reaction only while it is liquid and which dries under ambient conditions before about 15 minutes, and the use of a signature-applying implement containing a special ink including at least one color-forming chemical and/or a mixture thereof with a transparent dye or pigment. The special ink forms multi-colored signatures when applied to the discontinuous time card coating, according to a preferred embodiment.

REFERENCES:
patent: 4186243 (1980-01-01), Astbury et al.
patent: 4227199 (1980-10-01), Sharkey

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