Testing device for an electric generator

• US 5,144,232 A
• Filed: 04/29/1991
• Issued: 09/01/1992
• Est. Priority Date: 04/29/1991
• Status: Expired due to Fees

• Current Assignee: Larry W. Veenstra
• Original Assignee: Larry W. Veenstra
• Inventors: Veenstra, Larry W.
• Primary Examiner(s): Wieder, Kenneth A.
• Assistant Examiner(s): EDMONDS, WARREN
• Application Number:
  US07/692,949
• Time in Patent Office: 491 Days
• Field of Search: 324/158 R, 324/158 MG, 324/177, 324/158 SM, 324/158 SY, 324/166, 322/99, 340/648, 290/40 A, 290/40 D, 361/30
• US Class Current: 324/177
• CPC Class Codes: G01P 3/48 by measuring frequency of generated current or voltage in general G01R23/00
• CPC Class Codes: G01R 31/343 in operation

Abstract

An RPM and voltage indicator is used to check the operating speed and voltage output of a generator set. The device is used to verify the proper operation of a generator set or any auxiliary power unit, such as a DC to AC invertor, and further functions as a tool to make necessary adjustments to a governor or frequency control of any such generator set or auxiliary power unit.

Claims

1. An RPM and voltage indicator for an electrical generator comprising:

time base means for establishing a time base for said indicator, said time base means being utilized to establish a time base set at one hertz;

latch/reset means triggered by an output of said time base means;

counter means for measuring a frequency from an output of said latch/reset means, said counter means comprising a three digit BCD counter;

latch/decoder/driver means for receiving an output from said counter means;

display means for displaying a frequency received from an output of said latch/decoder/driver means;

power supply means which includes a transformer having a rectifier and filter, said transformer supplying a necessary direct current voltage to power said indicator;

a wavefore shaping circuit tapped into said transformer to supply said frequency for a frequency input;

a voltmeter tapped into primary windings of said transformer so as to provide a continuous reading of an input voltage which is an output voltage of said generator.