US 4,769,765 A · Controlled access programmable event timer system

Abstract

A control system is disclosed which can be attached to equipment such as appliances or automobiles, or built in as a part thereof. The control system includes an enabling/disabling device such as a relay in a circuit in the equipment. A time setting device is used to program a microprocessor with the times when the relay will open and close--thereby disabling and enabling the equipment. The time setting device can only be used to set the times by a person having an authentic authorization device such as a card or a key. The card is read by a card reader and the information obtained is compared by the microprocessor with the authentic information. In the case where a key is the authorization device, it is used to close a circuit to the microprocessor. A liquid crystal display is provided to display time information, and a rechargeable battery is included to prevent changing the time by unplugging the equipment.

Claims14

Dependent claims

A control system connectable to equipment for permitting the operation of the equipment only during times specified by an authorized person comprising:

enabling/disabling means connected to the equipment controlling operability of the equipment;
timer means connected to said enabling/disabling means for causing said enabling/disabling means to assume enable and disable positions at one or more designated times;
said timer means including time digit entry means for setting said designated times for operation and stopping of operation of the equipment;
and
said timer means including a card reader for producing signals representing an authorization authentication code for preventing operation of said time setting means except by an authorized person.

2 more elements

Dependencies are inferred from the claim text.

Controlled access programmable event timer system

Life of this patent

Controlled access programmable event timer system

Life of this patent

Abstract

Claims14