Communications: electrical – Continuously variable indicating – With meter reading
Patent
1994-08-23
1997-01-14
Holloway, III, Edwin C.
Communications: electrical
Continuously variable indicating
With meter reading
3408253, 34082522, 70271, 70278, E05B 4300, E05B 4900
Patent
active
055944302
ABSTRACT:
A programmable time lock includes a microprocessor, which senses the angular position of a key shaft via a sensor/encoder. The microprocessor includes ROM and RAM memory circuits, a timer, and a clock, and it can activate a stepper motor to control the position of a detent pin. The microprocessor is also connected to a display, which has fields for hours, minutes and seconds, as well as for the days of the week, for a cursor for each day, and for a low-power indicator. System time, as well as opening times for the lock may be set and changed simply by turning the key according to predefined routines. A method for operating the lock includes sets of steps for each of several routines: setting real time, setting opening times for each selected day of the week, and specialty routines including adding an intermediate opening time, cancelling the opening time for selected days, adjusting the system time, for example to change to or from daylight savings time, and verifying the version of the time lock in use. For all routines, the user first arms the lock by turning the key, and then selects a routine and enters the desired parameters by turning the key either continuously clockwise or counter-clockwise (to increment or decrement times or days) or by turning it back and forth to switch routines. In most routines, leaving the key stationary is used to signal acceptance of entered data.
REFERENCES:
patent: 4376993 (1983-03-01), Freeman
patent: 4387420 (1983-06-01), Singhi et al.
patent: 4774512 (1988-09-01), Jolidon et al.
patent: 4875351 (1989-10-01), Evans, et al.
Updated Product Brochure of Seiko Corp. of Tokyo, Japan for "SMC 6281 Series CMOS 4-Bit Single-Chip Microcomputer".
Butterweck Dieter
Cutter Larry
Gartner Klaus W.
Monnier Jean-Luc
Sermet P-A
Ciposa Microtechniques SA
Holloway III Edwin C.
La Gard
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