The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 05, 1988
Filed:
Dec. 22, 1986
Laurence S Slocum, Indianapolis, IN (US);
Sara M Mussmann, Indianapolis, IN (US);
Emhart Industries, Inc., Indianapolis, IN (US);
Abstract
A plurality of probes for sensing their fluid environment are electrically connected to a controller. The controller includes an alarm transducer, relays, a keyboard, and a display connected to a microprocessor and associated memories. Under keyboard control and software direction the microprocessor is operable in a monitor mode in which it monitors the probes and activates the transducer, relays, and display in response to probe signals corresponding to selected alarm conditions, and in a program mode in which the alarm conditions, relay latching conditions, and probe to relay assignments may be selected via the keyboard. A hardware timer interrupts the microprocessor periodically to clock a software timer which provides six second and six minute timers. When monitor mode is exited, the six second timer is reset and if a security code is not entered in six seconds the timer elapses and the system returns to monitor mode. Similarly, when program mode is entered, the six minute timer is reset and if no program entries are made in six minutes, the system returns to monitor mode. The six minute timer is reset each time a program entry is made and is delayed so long as probe to relay assignments are being made.