ROBERT H JABS
Engineers in Greensburg, PA
License number
Pennsylvania PE030565E
Category
Engineers
Type
Professional Engineer
Address
Address
Greensburg, PA 15601
Professional information
Method And Apparatus For Verifying The Seismic Integrity Of An Electronic Component
US Patent:
4697461, Oct 6, 1987
Filed:
May 19, 1986
Appl. No.:
6/864617
Inventors:
Robert H. Jabs - Greensburg PA
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
G01N 308, G01N 1904
US Classification:
7386253
Abstract:
A method and apparatus for verifying the seismic integrity of a lead of an electronic component contained in an electric circuit wherein: a force of a desired magnitude is applied to the lead of the electronic component with the magnitude corresponding to the expected maximum force which would be exerted on the lead by an earthquake, and an indication is provided when the lead has been subjected to the applied force for a given period of time corresponding to the approximate period of time the maximum force of an earthquake would be exerted on the lead. Moreover, the force is released if the desired magnitude has been applied for a further preset period of time which is greater than the given period of time, or if the magnitude of the applied force exceeds a preset maximum value.
Testing Device For Detecting Contact Chatter In Electrical Components With Movable Contacts, Such As Relays
US Patent:
4686478, Aug 11, 1987
Filed:
Jun 5, 1985
Appl. No.:
6/741424
Inventors:
Robert H. Jabs - Greensburg PA
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
G01R 3112, G01R 3102, G08B 2100
US Classification:
324420
Abstract:
A contact chatter detector includes a bipolar power supply and a switching system which permits the fixed contacts of a relay under test to be connected either to the positive or the negative terminal of the power supply, the movable contacts of the relay under test being grounded. Depending upon the switch position and whether or not chatter is present, the fixed contacts may be at ground potential, a positive potential, or a negative potential. Binary gates continuously monitor the fixed contacts, and are able to accommodate the three input states by receiving power from power supply translation circuits which effectively adjust the gates to be responsive to the negative potential and ground at one switch position and to ground and the positive potential at another switch position. Interruption alarms connected to the gates determine whether chatter exceeds a predetermined minimum, regardless of the rate at which the chatter pulses occur. The contact chatter detector can easily be expanded to permit testing of more than one relay simultaneously.