Douglas Rp Hall

US Patent:

6317037, Nov 13, 2001

Filed:

Nov 3, 1998

Appl. No.:

9/185081

Inventors:

Craig A. Ayres - Lapeer MI
Douglas Hall - Clarkston MI

Assignee:

Atoma International Corp. - Newmarket

International Classification:

B60Q 100

US Classification:

340461

Abstract:

An instrument panel having easy-to-read instruments is disclosed and which in certain embodiments allows for more efficient use of space behind the instrument panel by providing a partially reflective screen in the instrument panel and mounting certain instruments or instrument elements in the brow of the dashboard over and in front of the screen so that images of the instruments or elements in the brow are reflected off the screen. Other instruments or instrument elements may be located behind the screen, and from a viewing location, the instruments or elements combine into an integral display.

US Patent:

61418811, Nov 7, 2000

Filed:

Nov 3, 1998

Appl. No.:

9/185078

Inventors:

Craig A. Ayres - Lapeer MI
John A. Ayres - Lapeer MI
Douglas Hall - Clarkston MI

Assignee:

Invotronics Manufacturing - Lapeer MI

International Classification:

G01C 1702
G01C 1728

US Classification:

33361

Abstract:

An compass having an electronic magnetic field sensor and an analog directional display is disclosed wherein a signal from the field sensor proportional to one component of the earth's magnetic field is alternated in polarity and integrated to produce a triangular waveform the frequency of which is proportional to the strength of that field component and wherein a triangular waveform having a frequency proportional to the second component of the earth's magnetic field is produced in the same manner. These values are used by a microcontroller to control an air-core gauge such that a disk with reference markings attached to the gauge remains positioned with one of the reference markings facing either magnetic or true north. A resistor ladder network is also connected in parallel to the inputs of the integrators and controlled by the microprocessor through a shift register in order keep the integrators out of saturation.