The disclosed memory enhancing apparatus includes an oscillating section for generating a plurality of first signals. A counting section is coupled to the oscillating section for receiving the first signals and responsively generating a plurality of second signals having time intervals therebetween, each of the time intervals having a duration different from that of the immediately preceding interval. A dividing section is coupled to the counting section and includes means for varying the frequency of the first signals while an output section is coupled to the counting section for providing a reminding signal in response to each of the second signals.
A selective call receiver (100) comprises a receiver (104) for receiving a message and a vibrator (116) capable of vibrating at a selected one of at least two selectable frequencies for alerting a user of a received message. The vibrator (116) also has a selector (120) or a tuning element (130) for varying the frequency of the vibrator (116).
A device whereby the wearer receives a succession of prompts on a random interval schedule of reinforcement when activated by a corresponding succession of user inputs comprising: push of input push button, switch to determine if input is valid or invalid, means to activate random number generator, means to activate decrement, switch to determine completion or non-completion of decrement, output of one pulse, push of input push button, switch to determine if input is valid or invalid, step timer, switch to determine if invalid input push button occurred within ten seconds of output of one pulse, a push of input push button, switch to determine if input is valid or invalid, step timer, switch to determine if invalid input push button occurred within ten seconds of push of input push button, means to activate random number generator, means to activate decrement, switch to determine completion or non-completion of decrement, and output of two pulses.
A computerized checklist system is provided for ensuring safe and consistent operation of sophisticated equipment such as aircraft, milling machines, and other complicated systems. The checklist system includes a microprocessor having an erasable programmable read only memory for storing alphanumeric data in the form of checklist items. A display panel is provided for visual output of the checklist items, and a voice synthesizer is provided for audible output of the checklist items. The system is designed to accommodate checklists in the form of a number of sublists, with each sublist comprising checklist items in a predetermined sequence. A control panel is provided to initiate the checklist sequence, progress through the sequence of items, skip items in the sequence, return to skipped items automatically at the end of the sequence, and exit the sequence at any time upon command.
