1
Bartlett Peter G: Digital computer having signal circuitry.. Automation Syst, March 29, 1989: EP0308583-A2 (53 worldwide citation)

A combination of a programmable logic controller with analog circuitry. The analog circuitry includes a summation point to which several items are coupled. Analog inputs are selectively coupled to the summation point through analog switches. Also, the output of a digital to analog converter couples ...


2
Bartlett Peter G, Henry Donald E, Murrell Thomas: Process control computer. Struthers Dunn, September 25, 1973: US3761882 (13 worldwide citation)

A solid state process control computer for continually controlling a plurality of outputs in dependence upon the conditions of a plurality of continually variable input parameters. The controller includes a memory capable of storing a large number of multi-bit words each comprising both an address a ...


3
Bartlett Peter G, Henry Donald E: Contact monitoring system. Struthers Dunn, December 7, 1971: US3626248 (13 worldwide citation)

Circuit means for monitoring the conditions of a plurality of contacts, thereby making it possible to determine at each instant which contact is open and which is closed. The output of each contact monitoring circuit is electrically isolated from all of the monitored contacts and also from any circu ...


4
Bartlett Peter G: Quad AC power switch with synch. Struthers Dunn, May 16, 1972: US3663950 (12 worldwide citation)

Circuit for controlling the energization of an alternating-current load in which the load is electrically isolated from the controlling input. Energization of the load is controlled by a bi-directional thyristor whose gate electrode is energized with a high frequency, square-wave voltage provided by ...


5
Bartlett Peter G, Henry Donald E: Process control computer. Struthers Dunn, Hall & Myers, April 29, 1975: US3881172 (12 worldwide citation)

A solid state process control computer for continually controlling a plurality of outputs in dependence upon the conditions of a plurality of continually variable input parameters. The controller includes a memory capable of storing a large number of multi-bit words each comprising both an address a ...


6
Bartlett Peter G: Welding system controller. Hall William D, July 30, 1974: US3826890 (11 worldwide citation)

A welding system controller for use with square hystersis loop welding transformers. The controller allows for at least two time-spaced welding operations to be performed, each of the welding operations having its time duration and heat intensity independently selected. Although heat intensity is a ...


7
Bartlett Peter G, Henry Donald E, Riceman Kenton L: Cabinet for interchangeable circuit boards. Struthers Dunn, October 9, 1973: US3764857 (10 worldwide citation)

The disclosure relates to a cabinet with replaceable and removable circuit boards. The cabinet is provided with a plurality of circuit boards, each of the circuits being provided with indicating means for identifying the input for and output from the circuit. Means are provided on the interior of th ...


8
Clark Larry K, Bartlett Peter G, Hill Frank W: Conflicting phase error detector. Gulf & Western, December 21, 1971: US3629802 (10 worldwide citation)

A system for traffic signal controllers is provided to detect the occurrence of coincident command signals that would cause right-of-way signals to be displayed for conflicting or intersecting traffic lanes or traffic paths or courses. For such detection NOR logic means are provided with input conne ...


9
Bartlett Peter G, Meschi Joseph E: Ferroelectric capacitor output amplifier detector. Gulf & Western, August 10, 1971: US3599185 (8 worldwide citation)

An improvement is provided for two-plate internally polarized nondestructive readout ferroelectric ceramic capacitor, binary memory elements in which one plate serves as the drive plate and the other serves as the memory plate. There is an electrical bit line connection to the memory plate from whic ...


10
Bartlett Peter G, Henry Donald E: Process control system. Struthers Dunn, March 21, 1972: US3651477 (8 worldwide citation)

The present invention provides a process control system which minimizes the effect of noise on the system and also minimizes the amount of noise produced by the system. This is accomplished by properly timing all operations, both sensing and control, so as to both minimize the possibility of a spuri ...