John F Perry
Medical Practice in Salt Lake City, UT

3961173, Jun 1, 1976

Nov 20, 1974

5/525423

John T. Perry - Salt Lake City UT
Joel J. Schmutzer - Oak Park IL

Varian Associates - Palo Alto CA

G06G 756, H02H 504

235184

Apparatus to indicate the temperature of an X-ray tube target includes an analog storage circuit to simulate the heat energy stored. Input signals representing the current and the voltage of the electron beam in the tube are multiplied to give a signal representing the instantaneous power input. The power signal is integrated in the storage circuit to give a temperature signal representing the total heat input. The temperature signal is dissipated by a cooling curve circuit representing the heat loss with time. An indicator reads the temperature signal. Input voltage and current signals are processed to refer them to ground before multiplication. The current signal is corrected to set its zero value. The voltage signal derived from a transformer primary is corrected for transformer regulation. To eliminate spurious inputs the power signal is gated to the storage circuit only when a measured current is flowing.

3955119, May 4, 1976

Oct 11, 1974

5/514157

John T. Perry - Salt Lake City UT
James A. Grichnik - Park Ridge IL
Joel J. Schmutzer - Oak Park IL

Varian Associates - Palo Alto CA

H05G 130

315133

Failure inducive operating conditions of an X-ray generator tube are sensed. Some of the sensed operating conditions are events such as hot overload of the target and thermal shock of the target, while other sensed operating conditions include hot target bearing use and thermionic cathode filament heater use. Certain of the sensed operating conditions are integrated, with the integrated output being compared against a predetermined standard to yield a prediction of remaining operating life. Other sensed conditions, if present, are indicative of incipient failure without integration. The integrated signals are stored in electrochemical cells and read out periodically for a prediction of incipient tube failure.

4516679, May 14, 1985

Nov 4, 1982

6/439303

Carolyn N. Simpson - Salt Lake City UT
John A. Perry - Salt Lake City UT

B65D 7300

206459

A multipli-layered tamper-proof wrap consisting of a number of over-layed thin plastic sheets bonded around the outer edge to contain one or a number of chemical layers therein, appropriately separated, whose penetration or puncture will result in a visual indication at the puncture, and including distinct seals fixed at spaced intervals to the outer or external wrap sheet that indicate wrap or product origin and are to discourage wrap substitution. The wrap is for encapsulating a consumer product so as to provide a continuous wrap surface therearound that will give a visual indication of a breach in wrap integrity at a point of penetration or puncture.