Joel Robert Mcdaniel

US Patent:

20040217882, Nov 4, 2004

Filed:

May 1, 2003

Appl. No.:

10/426535

Inventors:

Lewis Ross - Antioch CA, US
Stephen Moore - Antioch CA, US
Joel McDaniel - Clayton CA, US

International Classification:

G08G001/01

US Classification:

340/941000

Abstract:

A. The apparatus is intended for installation as an appurtenance to traffic signal inductive loop detectors. B. The apparatus is a maintenance aid. Installation of the apparatus will reduce the incidence of maintenance where the frequency of the detector loop drifts out of specification due to conditions of installation or environmental factors. C. The apparatus is manually operated. The apparatus is used to increase the frequency of the detector loop when, the frequency of the detector loop varies out of the specified frequency range for proper operation of the detector loop for sensing the presence of a vehicle. D. The apparatus functions by means of a traveling rod and ferrite sleeve positioned by linear movement parallel to the center axis of a coil. A knob connected to the traveling rod, is used to change the position of the traveling rod by manually rotating the knob.