Aerosol can static electrometer

• US 4,321,546 A
• Filed: 04/15/1980
• Issued: 03/23/1982
• Est. Priority Date: 04/15/1980
• Status: Expired due to Term

• Current Assignee: Calpine Corporation
• Original Assignee: Calpine Corporation
• Inventors: Schneider, Clayton J. Jr.
• Primary Examiner(s): Tokar, Michael J.
• Application Number:
  US06/140,521
• Time in Patent Office: 707 Days
• Field of Search: 324/122, 324/71 CP, 324/72, 324/72.5, 324/464, 324/452, 324/457, 324/458, 324/459, 324/158 P
• US Class Current: 324/457
• CPC Class Codes: G01R 29/24 Arrangements for measuring quantities of charge

Abstract

An aerosol can is dispensed through an electrically isolated screen from a fixed distance which induces a charge on the screen from the passing cloud. The charge is conducted by wire into a capacitor where the charge builds up and is measured as a voltage by means of a high impedance voltmeter.

Claims

1. A method for assessing static charge generation by an aerosol container during discharge and including the steps of:

discharging an aerosol container through an electrically isolated screen; and

measuring the voltage induced upon a capacitor connected to the screen to thereby permit the determination of the static charge generated.

2. Apparatus for assessing the static charge generation by an aerosol container during discharge and including:

a screen;

means for supporting and electrically isolating said screen;

a low loss capacitor connected to said screen; and

a high impedance voltmeter connected for measuring the voltage produced on said capacitor when an aerosol container has been discharged through said screen to thereby permit the determination of the static charge generated.