US 4,769,555 A · Multi-time delay power controller apparatus with time delay turn-on and turn-off

Abstract

Multi-time delay power controller apparatus for providing time delayed power-up and power-down for associated electrical equipment, such as computer systems, comprises a power stage configured for connecting to a conventional power outlet, a D.C. power supply connected to an internal D.C. voltage bus, an output stage having a plurality of time delayed outputs and a plurality of time delay turn-on timing stages connected in electrical series with one another between the D.C. bus and ground. Each such stage comprises an R-C circuit and a type 555 integrated circuit which together function as a timer. Included in each stage is a control relay. The energizing coils of the relays in odd numbered stages are connected to ground and of even numbered stages to the D.C. bus. The timing stages are connected so that the timing out of one stage starts the timing of the next-in-sequence stage, the timing of the first-in-sequence stage being started when the apparatus is turned on. The control relays, which provide voltage to the time delayed output stages are energized, in sequence, when each stage times out. Timed delay turn-off means are provided for sequentially removing the voltages to the outputs in the reverse order in which voltage is applied by operation of the control relays. The time delay turn-off means include relays through which the time delay turn-on relays are energized and which cause deenergizing of the control relays in the turn-off sequence.

Claims20

Dependent claims

Time delay power controller apparatus which comprises:

(a) a power stage and means for connecting said power stage to a conventional power source;
(b) a plurality of time delayed outputs;
(c) a D.C. voltage bus and a ground;
(d) a D.C. power supply connected between the power stage and the D.C. bus;
(e) a plurality of time delay, turn-on timing stages connected between said D.C. bus and ground.
each of said turn-on timing delay stages comprising a timer initiating voltage input line, a time delay voltage output line, a control relay having an energizing coil connected to said time delay voltage output line and timing means connected between said timer initiating voltage input line and the time delay voltage output line for causing, a predetermined time interval after a change in voltage state appears on said timer initiating voltage input line, a voltage state change on said time delay voltage output line, said voltage state change on said time delay voltage output line causing the energizing of said control relay coil and thereby causing a time delayed voltage to be provided to a corresponding one of the time delayed outputs;
(f) means for interconnecting said time delay timing stages in electrical series with one another, the time delay voltage output line of each of said timing stages, except the last-in-sequence one thereof, being electrically connected to the timer initiating voltage input line of the next-in-sequence one of the timing stages;
and
(g) means for changing the voltage state on the timer initiating voltage input line of the first-in-sequence one of the timing stages to thereby initiate the timing sequence.

6 more elements

Time delay power controller apparatus which comprises:

(a) a power stage and means for connecting said power stage to a conventional power source;
(b) a plurality of time delayed outputs;
(c) a D.C. voltage bus and a ground;
(d) a D.C. power supply connected between the power stage and the D.C. bus;
(e) a plurality of time delay, turn-on timing stages connected between said D.C. bus and ground.
each of said turn-on timing delay stages comprising a timer initiating voltage input line, a time delay voltage output line, a control relay having an energizing coil connected to said time delay voltage output line and timing means connected between said timer initiating voltage input line and the time delay voltage output line for causing, a predetermined time interval after a change in voltage state appears on said timer initiating voltage input line, a voltage state change on said time delay voltage output line, said voltage state change on said time delay voltage output line causing the energizing of said control relay coil and thereby causing a time delayed voltage to be provided to a corresponding one of the time delayed outputs;
(f) means for interconnecting said time delay timing stages in electrical series with one another, the time delay voltage output line of each of said timing stages, except the last-in-sequence one thereof, being electrically connected to the timer initiating voltage input line of the next-in-sequence one of the timing stages;
(g) means for changing the voltage state on the timer initiating voltage input line of the first-in-sequence one of the timing stages to thereby initiate the timing sequence;
and
(h) time delay turn-off means for de-energizing the relays in each of the turn-on timing delay stages in a preselected, time delay turn-off sequence, the deenergizing of each of the relays causing the removing of voltage applied to the corresponding one of the time delay outputs thereby.

7 more elements

Time delay power controller apparatus which comprises:

(a) a power stage and means for connecting said power stage to a conventional power source;
(b) a plurality of time delayed outputs;
(c) a D.C. voltage bus and a ground;
(d) a D.C. power supply connected between the power stage and the D.C. bus;
(e) a plurality of time delay, turn-on timing stages, each of said turn-on timing stages being connected between said D.C. bus and ground and each including means for providing a time delayed voltage to a corresponding one of the time delayed outputs in accordance with a preestablished turn-on time delay schedule;
and
(f) means for removing the voltages applied to the time delayed outputs by the time delay turn-on timing stages according to a preestablished turn-off time delay schedule.

4 more elements

Dependencies are inferred from the claim text.

Multi-time delay power controller apparatus with time delay turn-on and turn-off

Life of this patent

Multi-time delay power controller apparatus with time delay turn-on and turn-off

Life of this patent

Abstract

Claims20