Richard G Hock

US Patent:

45816913, Apr 8, 1986

Filed:

Apr 23, 1984

Appl. No.:

6/603072

Inventors:

Richard H. Hock - Hopatcong NJ

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

H02H 908

US Classification:

363 21

Abstract:

A current converter circuit that supplies send and return currents to a balanced transmission line includes current sensing circuitry that responds to a current unbalance or a differential current, independently of longitudinal currents in the balanced line. A reference voltage and two inputs to a comparator monitor the voltage drop across a voltage divider connecting the send and return leads of the transmission line. The voltage divider has a grounded center tap so that longitudinal currents flow to ground and provide equal and opposite polarity voltages across the divider, which cancel each other. Unbalanced currents provide a corresponding differential voltage input to the comparator, whose control voltage output is utilized to initiate corrective action in a current control circuit.

US Patent:

42386950, Dec 9, 1980

Filed:

Oct 20, 1978

Appl. No.:

5/953196

Inventors:

Richard H. Hock - Landing NJ

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

H03K 5153

US Classification:

307350

Abstract:

A high current, high speed comparator switching circuit includes circuits to positively control turn on and turn off of switching transistors and counteract conduction overlap due to stored charge resulting from high current loads.

US Patent:

40074137, Feb 8, 1977

Filed:

Dec 8, 1975

Appl. No.:

5/638315

Inventors:

Phil Dewey Fisher - Millington NJ
Richard Howard Hock - Landing NJ

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

H02M 3335

US Classification:

321 2

Abstract:

A single-ended converter circuit combines a magnetic energy storage medium with an energy discharge path to simplify transformer design, improve transformer operating characteristics, and reduce induced electromagnetic interference. The concept is extended to self-oscillating, single-ended converters and a double-ended type is achieved by combining two single-ended converters with a single power transformer structure.

US Patent:

43130607, Jan 26, 1982

Filed:

Feb 15, 1980

Appl. No.:

6/121750

Inventors:

Hermann Fickenscher - Madison NJ
Richard H. Hock - Landing NJ
Richard C. Ray - Randolph Township, Morris County NJ
Rudolph Scuderi - Mountain Lakes NJ

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

H02J 700

US Classification:

307 23

Abstract:

An uninterruptible power supply utilizes a controlled ferroresonant regulator to derive a regulated DC voltage from a primary AC source. A reserve source of DC power is coupled to the output through a DC voltage regulator which is activated when the DC output voltage of the power supply drops below a predetermined threshold.