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Class 33/269 - Time computing


Subclass of Class 33 - Geometrical instruments
Definition: Device including means whereby the time of day may be determined.
No. of patents: 21
Last issue date: 11/29/2011


NumberTitleIssue Date
8065808Sundial with dome and grid of light
Sundial apparatus with overlying barrier grid. ...
11/29/2011
7698825Automatic solar compass
The most accurate method of finding the true north is through astronomical observations, for example, by observing the position of the sun. However, the procedure is complicated. The instantaneous position of the sun must be calculated from astronomical data for eac...
04/20/2010
7555840Omni-directional lens in sundials and solar compasses
Sundials and solar compasses including are disclosed. Some embodiments include an omni-directional lens, which can focus a sun beam into a sharp spot with a long depth of field. By projecting the spot onto a cylindrical panel, both the day of the year and the time o...
07/07/2009
7197381Navigational system and method utilizing sources of pulsed celestial radiation
A system and method for navigation utilizing sources of pulsed celestial radiation are provided. A spacecraft, satellite, or other vehicle (12) has a pulse sensor (22) mounted thereto for detecting signal pulses (14) generated by a plurality of ...
03/27/2007
7155833Viewing and display apparatus position determination algorithms
Celestial object location devices with sensor arrays of having less that one sensor for each of three orthogonal components of gravity and magnetic field vectors. The accuracy of position sensing is enhanced by estimating “missing” sensor input based on input fr...
01/02/2007
7068180Celestial object location device
A hand-held electronic celestial object-locating device assists in identifying a celestial object or directing a user to a desired celestial object. The device is useful for locating or identifying any celestial object including stars, constellations, planets, comet...
06/27/2006
6680877Solar night splitter and event timer
A solar counter to provide an accurate way of measuring the middle of the night or another selected fraction of the day or night. The solar counter activates an electronic event when it has finished counting down. For example, a lamp can be turned off hal...
01/20/2004
6625085Universal timepiece from which latitude and longitude can be determined
A universal timepiece from which a latitude and a longitude can be determined. A bottom plate which has the names of the main cities in the world, scales and the relative longitudes according to the real longitudes of the cities on the circumference there...
09/23/2003
6612041Diurnal solar event triggering mechanism
A mechanism for determining whether the sun is visible at a diurnal solar event and for mechanically triggering actions based upon the sun being visible during the diurnal solar event is disclosed. The mechanisms of the invention can perform these operati...
09/02/2003
5701678Space-time tracker
A space-time tracker for announcing the time and tracking the celestrial bodies on the spot of observation comprises a clock mechanism with clock hands on a dial of 24 hours and a synchronic motor for driving a star atlas and a plurality of planet driving...
12/30/1997
5269065Compass including means for displaying constellation data
A compass wherein positional information regarding a predetermined terrestrial location is stored; present time, corresponding to the terrestrial location whose positional information is stored, is measured and displayed; and constellation data is stored....
12/14/1993
5253225Compass watch of the mechanically or electromechanically driven type and bezel specifically intended for such a watch
This invention concerns a compass watch as well as a bezel specifically intended to fit out such a watch. The invention comprises at least one time indicating element (4) kinematically driven in rotation by a mechanical or electromechanical horometric mov...
10/12/1993
5197199Reflected spot sundial
A sundial is described using a mirror to reflect an indexing spot of sunlight onto the back of a translucent dial face that is marked with time and date indicia. Adjustments are provided so that a sundial designed for any location can be used in another l...
03/30/1993
5056232Remote light source responsive visual time indicator
A remote light source responsive time indicator includes a preferably cylindrical body of transparent material with a light receiving and refracting surface on one side and an axial image producing surface on a remaining side. The image producing surface ...
10/15/1991
4945644Hemispherical sundial with installation indicia
A sundial with a concave hemispherical body and top surface generally horizontal has longitude displacement, latitude, sun declination, and time indicia originating at the spherical gnomon located at the spherical center of the hemisphere. Site set up is ...
08/07/1990
4899451Solar compass and time indicator device
A solar compass device having a first disc member provided spaced apart time markings indicative of the time of day and disposed in a counterclockwise direction in a circular ring pattern thereon. A second disc member is rotatably displaceable with respec...
02/13/1990
4512085Method of and apparatus for telling time at night
An instrument for telling time at night includes a base that has a central aperture for sighting on Polaris and an annular hour scale inscribed on the base with the axis of the aperture as the center of the annulus, a calendar scale rotatable on the base ...
04/23/1985
4457296Heating model
A passive solar heating model for studying the daylight illumination of a lot containing buildings and trees comprises a platform, a pair of arms pivotally mounted at one end thereof to the opposite sides of the platform, and an arcuate guide track pivota...
07/03/1984
4346521Modern sundial
The disclosure relates to a sundial employing a new type of gnomon comprising an opaque design printed on a plate of transparent material. The sundial described is designed for use in a specific locale, thereby enabling greater accuracy. The design of the...
08/31/1982
4338727Shadowless sundial
A sundial is disclosed comprising specularly reflective convex surfaces that form virtual images of the sun in a separate plane or conical surface in which a numbered dial plate is mounted. The axis of revolution of the curved surfaces is mounted parallel...
07/13/1982
4136397Astronomical timepiece
A method and apparatus for determining local solar time for virtually any location on any planet having a radiating sun, wherein the method requires minimal a prior knowledge of the planet's major characteristics and the apparatus is organized so as to pe...
01/23/1979
 
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