KARL E PETERSON
Engineers in Hummels Store, PA

4307342, Dec 22, 1981

Jul 16, 1979

6/058035

Karl E. Peterson - Mohnton PA

Western Electric Co., Inc. - New York NY

G01R 3112, H03F 152

324158D

A surge protector is tested by injecting a current spike with an exponentially decaying waveshape (12) through the surge protector. The current is generated by connecting a voltage source (16) to the surge protector and controlling the current through the surge protector by a Darlington array amplifier (20) connected between the surge protector and ground. The Darlington array amplifier (20) is in turn controlled by first generating a reference pulse having a voltage waveform corresponding to the desired current waveform and comparing this reference voltage with a voltage feedback from the Darlington array amplifier (20) to in turn generate an error voltage which is coupled into the amplifier (20). Additionally, differential amplifier circuits (44 and 46) monitor the voltage impressed on the amplifier (20) and reduce the input voltage to the amplifier (20) significantly if the voltage impressed on the amplifier (20) is greater than a predetermined fraction of the voltage source (16).

4651203, Mar 17, 1987

Oct 29, 1985

6/792546

Karl E. Peterson - Mohnton PA

AT&T Technologies, Inc. - Berkeley Heights NJ

H04N 700, H04N 718

358101

Apparatus and method for positioning an article utilizes a video signal of the article from a television camera to accurately position the article. Vertical and horizontal sync signals from the camera are used to generate first and second boundary markers to provide. +-. X and. +-. Y positioning, respectively. Sensitivity markers are also generated to monitor system sensitivity in non-object areas. The magnitude of the coincidence between the article and the boundary markers is utilized to control the motion of the positioning adjustment.