David Brian Call

US Patent:

6840529, Jan 11, 2005

Filed:

Oct 17, 2002

Appl. No.:

10/273798

Inventors:

David B. Call - Boulder CO, US

International Classification:

B60D 500

US Classification:

280403, 280427, 2804551, 296166, 105 18

Abstract:

A recreational vehicle is made up of a pickup truck, a camper which is releasably mounted on the pickup truck and includes an accessway between the cab of the pickup truck and the camper, and a trailer which communicates with the camper through an articulated passage or walkway to permit movement of occupants between the camper and trailer while the vehicle is in motion.

US Patent:

20050067857, Mar 31, 2005

Filed:

Nov 17, 2004

Appl. No.:

10/990567

Inventors:

David Call - Boulder CO, US

International Classification:

B60P003/325

US Classification:

296156000

Abstract:

A recreational vehicle is made up of a pickup truck, a camper which is releasably mounted on the pickup truck and includes an accessway between the cab of the pickup truck and the camper, and a trailer which communicates with the camper through an articulated passage or walkway to permit movement of occupants between the camper and trailer while the vehicle is in motion.

US Patent:

45438366, Oct 1, 1985

Filed:

Oct 28, 1983

Appl. No.:

6/546733

Inventors:

David B. Call - Boulder CO

Assignee:

Atmospheric Instrumentation Research, Inc. - Boulder CO

International Classification:

G01F 105

US Classification:

7386185

Abstract:

An anemometer for sensing shaft speed rotation includes a series of circumferentially spaced, radially extending arms and a corresponding series of wind cups, each disposed at an outer radial end of one of the arms. Each arm terminates at its inner end in a hub sector correspondingly formed as a portion of a central hub and correspondingly includes circumferentially extending, complementary offset portions and fasteners for releasably interlocking the offset portions of overlappingly to define the common central hub. The hub-connecting portion is mounted on the anemometer shaft by connector means.

US Patent:

53472853, Sep 13, 1994

Filed:

Jun 15, 1992

Appl. No.:

7/898948

Inventors:

Peter F. MacDoran - Boulder CO
David B. Call - Boulder CO
Kenneth L. Gold - Boone CO

Assignee:

A.I.R., Inc. - Boulder CO

International Classification:

H04B 7185
G01S 502

US Classification:

342357

Abstract:

A method and system for tracking the position of at least one moving object, such as, an airborne meteorological instrument from a ground processing station by intercepting wideband spread spectrum signals transmitted from a plurality of satellites in which the code sequence of the signals is not known comprises a receiver circuit in the moving object which compresses the wideband signals received into a narrow band, removes any frequency bias with a reference oscillator having a frequency offset value, forms a narrow analog base-band and transmits to the processing station at which spectral lines are produced and compared with synthetic spectrum values to determine the identity of each satellite, the reference oscillator frequency offset value is estimated, and the location and velocity of the moving object is determined.

US Patent:

49074490, Mar 13, 1990

Filed:

Oct 31, 1986

Appl. No.:

6/926361

Inventors:

David B. Call - Boulder CO
James A. Nolan - Evergreen CO
Steven J. Lassman - Boulder CO

Assignee:

A.I.R., Inc. - Boulder CO

International Classification:

G01W 104
G01L 912
G01R 2726

US Classification:

73170R

Abstract:

A radiosonde has a novel and improved measuring circuitry for measuring atmospheric conditions, such as, temperature, humidity and pressure through the direct conversion of resistance and capacitance values into binary numbers. The binary numbers are transmitted in digital form along with calibration coefficients to a remote ground station. The measuring circuitry can be mounted on the same substrate with the pressure transducer, and the electrical connections between the pressure transducer and measuring circuitry are simplified by utilization of an offset diaphragm, pressure cell arrangement.

US Patent:

53458214, Sep 13, 1994

Filed:

Jan 15, 1993

Appl. No.:

8/005015

Inventors:

William L. Reich - Boulder CO
David B. Call - Boulder CO

Assignee:

A.I.R., Inc. - Boulder CO

International Classification:

G01N 2722
G01N 3318

US Classification:

7333504

Abstract:

A relative humidity sensor includes a printed circuit board having a central passageway therethrough and a dielectric film extending across the passageway with electrodes mounted on that portion of the film in the passageway so as to generate a capacitance which will vary directly with the amount of moisture content in the film.

US Patent:

41127536, Sep 12, 1978

Filed:

May 9, 1977

Appl. No.:

5/794936

Inventors:

David B. Call - Boulder CO

International Classification:

G01W 108

US Classification:

73170R

Abstract:

A radiosonde is conformable for use either as a disposable sonde in which the device will ascend vertically to a predetermined altitude and when the balloon from which it is suspended bursts at a maximum altitude the sonde will automatically flip over and autogyrate at a reduced rate of descent back to earth; or may be used as a tethered radiosonde in which it is suspended from a tethered balloon in such a way as to be freely rotatable about a substantially horizontal axis. In either version, the sonde is characterized by a generally helicoidal propeller construction having thermistor-receiving end tips and whereby the propellers will impart sufficient spin or rotation to the sonde as to cause the desired degree of aspiration to provide accurate wet bulb psychometric measurements; and further the propeller construction is such as to permit freefall at a reduced controlled rate of speed without the assistance of a parachute.