Jeffrey L Silberberg

US Patent:

40064131, Feb 1, 1977

Filed:

Dec 19, 1974

Appl. No.:

5/534237

Inventors:

Jeffrey L. Silberberg - Baltimore MD

Assignee:

The United States of America as represented by the Department of Health,
Education and Welfare - Washington DC

International Classification:

G01R 1916
G01R 1900

US Classification:

324103P

Abstract:

An apparatus for measuring and displaying the sag and surge voltage values of an AC power supply. Two inputs are attenuated, filtered and the peak difference is converted to a binary number by an analog-to-digital (A/D) converter. A digital comparator compares these conversions with the values stored in a maximum and minimum register. If the output of the A/D is larger than the contents of the maximum register, the previous maximum register's contents are replaced by the A/D output. If the output of the A/D is smaller than the contents of the minimum register, the previous minimum register's contents are replaced by the A/D output. Dual light emitting diode displays provide a numerical readout of the contents of the maximum and minimum registers.

US Patent:

43975526, Aug 9, 1983

Filed:

Oct 31, 1980

Appl. No.:

6/202727

Inventors:

Jeffrey L. Silberberg - Rockville MD

Assignee:

The United States of America as represented by the Department of Health
& Human Services - Washington DC

International Classification:

G01J 144

US Classification:

356215

Abstract:

An instrument for measuring laser energy in the visible range and which determines when the optical energy exceeds the accessible emission limit for a Class I laser. The instrument employs a photoelectric detector and a filter for a range of 476 to 633 nm. The instrument measures the optical energy as a function of time and compares the measured value with the accessible emission limit for a Class I laser at various critical points in time. A 3-digit engineering-notation display format is used to output the computed time at which the laser energy exceeds the Class I limit, as well as the total energy measured in 10 seconds. The instrument is adapted to measure either CW laser radiation, pulsed laser radiation, or each pulse of laser radiation, computes and applies a correction factor for optical error conditions or variations between optical detectors, and measures and compensates for background energy. Mode and scale information, and sensed data, are read into a micro computer and are read out on a LCD display.

US Patent:

42174970, Aug 12, 1980

Filed:

Jun 16, 1978

Appl. No.:

5/916209

Inventors:

Charles J. Daniels - Gaithersburg MD
Jeffrey L. Silberberg - Rockville MD

Assignee:

The United States of America as represented by the Department of Health,
Education and Welfare - Washington DC

International Classification:

G01T 120

US Classification:

250369

Abstract:

A portable neutron spectrometer/kerma-rate meter for the measurement of the fast neutron component of mixed n-. gamma. fields in the 1 to 15 MeV neutron energy range. The system includes an organic scintillation detector, pulse shape discrimination circuitry, a 1. 4. mu. sec multichannel analyzer, an 8-bit microcomputer, and appropriate displays. The instrument is capable of both gathering and processing recoil-proton pulse-height data in the field.

US Patent:

39684911, Jul 6, 1976

Filed:

Nov 25, 1974

Appl. No.:

5/526998

Inventors:

Jeffrey L. Silberberg - Baltimore MD

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G01S 904
G01S 906

US Classification:

343 12R

Abstract:

A range-determining circuit which counts the time from the transmission of detection-signal to its echo return, in units corresponding directly to the distance that the detection signal travels.

US Patent:

43463460, Aug 24, 1982

Filed:

Feb 5, 1980

Appl. No.:

6/118969

Inventors:

Jeffrey L. Silberberg - Rockville MD

Assignee:

The United States of America as represented by the Department of Health,
Education and Welfare - Washington DC

International Classification:

G01R 1510
G01R 1902

US Classification:

324132

Abstract:

A line voltage monitor which can measure d. c. and RMS a. c. voltage and frequency, maximum and minimum RMS voltage, which displays input voltage, and computes and displays % regulation from the measured maximum and minimum voltage values. Analog input circuitry attenuates and squares the input voltage. A voltage-to-frequency converter produces logic pulses at a rate proportional to the squared signal. A 16-bit counter integrates V. sup. 2 by accumulating pulses from the voltage-to-frequency converter. A second 16-bit counter increments at a 1 MHz rate to determine the cycle period T of the input. A microcomputer divides the. intg. V. sup. 2 value by the period T and then takes the square root, yielding the RMS value of the input voltage. The microcomputer can be switched to determine the % regulation and the input frequency, and can be used to enable display of V. sub. max, V. sub. RMS (t) or V. sub.

US Patent:

42174961, Aug 12, 1980

Filed:

Mar 14, 1978

Appl. No.:

5/886465

Inventors:

Charles J. Daniels - Gaithersburg MD
Jeffrey L. Silberberg - Beltsville MD

Assignee:

The United States of America as represented by the Secretary of Health,
Education and Welfare - Washington DC

International Classification:

G01T 120

US Classification:

250369

Abstract:

A portable high-speed neutron spectrometer consisting of an organic scintillator, a true zero-crossing pulse shape discriminator, a 1 MHz conversion-rate multichannel analyzer, an 8-bit microcomputer, and appropriate displays. The device can be used to measure neutron energy spectra and kerma rate in intense n-. gamma. radiation fields in which the neutron energy is from 0. 5 to 15 MeV.