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| Number | Title | Issue Date |
| 8091245 | Sundial Disclosed are embodiments of a sundial. Various embodiments of the sundial disclosed herein may be used to determine the time of day based on the position of the sun. The sundial may utilize a curved reflector to reflect the image of the sun onto a dial-face. The cu... | 01/10/2012 |
| 7979994 | Ultraviolet risk indicator An ultraviolet risk indicator instrument comprising a dial and a shadow projection device on it, the dial having colored areas that indicate different UV risks, defined by lines of declination (solstices and equinoxes) and solar hour lines calculated based on the tr... | 07/19/2011 |
| 7950159 | Sundial Disclosed are embodiments of a sundial. Various embodiments of the sundial disclosed herein may be used to determine the time of day based on the position of the sun. The sundial may utilize a curved reflector to reflect the image of the sun onto a dial-face. The cu... | 05/31/2011 |
| 7721454 | Rock fashionable calendar horologe A calendar indicating device can include easy placement through a north-south block (1) to orient an equinox line (3) to provide sunrise shadow indications of one or more solstice events such as the summer solstice or the winter solstice at the moment ... | 05/25/2010 |
| 7685722 | Compact celestial navigation device A celestial navigation device. A full-featured embodiment is useful as a sundial and planisphere and for measuring, among other things, latitude, longitude, and for time to angle conversions. The device may have one or more rings and is based on a transparent circul... | 03/30/2010 |
| 7516557 | Solar site selection apparatus and method An apparatus receives a digital image of a sun trace chart having time gradient lines and a sun trace extent line for a site. A selector defines on a display points along the solar trace extent line to define a solar opportunity region. An adjuster adjusts the digit... | 04/14/2009 |
| 7228634 | Using viewing-angle-sensitive visual tags to determine angular orientation and/or location One embodiment of the present invention provides a system that uses a visual tag to determine an angle. During operation, the system observes the visual tag from an observation point, wherein the visual tag includes an angle-sensitive image which changes in appearan... | 06/12/2007 |
| 7200097 | Parallel recording and reading of diffractive memory using multiple object beams A parallel recording of diffractive storage system is provided. The recorded information is cellular for its designation. A laser beam is data modulated through a single reference beam and a plurality of object beams positioned at different angles. These object beam... | 04/03/2007 |
| 7114262 | Sundial with standard time display A horizontal sundial (1) that can be used to find standard time accurately and be manufactured on a commercial basis for any specific location, incorporating a gnomonic projection map (1M), a wire gnomon (1a) to indicate the time on a sca... | 10/03/2006 |
| 7106660 | Sun dial and method for determining average sunlight A sun dial including a housing, a light detector mounted on the housing exposed to detect ambient light, a logic circuit mounted in the housing for processing the detected light for determining over a preselected period of time the average light detected by the ligh... | 09/12/2006 |
| 6871407 | Equatorial sundial with simple time and date interpretation This invention represents an improvement to an equatorial sundial comprising an independent simultaneous single scale indication of both time and date as represented from a primary and secondary gnomon. This allows one unfamiliar with the physics of an equatorial su... | 03/29/2005 |
| 6810594 | Astronomical, particularly solar and/or lunar, goniometric indicator An astronomical, particularly solar and/or lunar, goniometric indicator comprising a reflecting member (1; 16; 20) having at least one planar surface scored with substantially circular and concentric microgrooves, wherein the width and the depth of each micro... | 11/02/2004 |
| 6680877 | Solar 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 |
| 6612041 | Diurnal 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 |
| 6604290 | Sidereal sundial By adding an opaque ecliptic half-plane (24) to a partially open or transparent equatorial disk (12) which bears a sidereal hours scale (20), and by being able to rotate this plane (24) and disk (12) jointly in order to minimize the shadow being cast (74)... | 08/12/2003 |
| 6523270 | Universal heliodon-sundial An apparatus for use with a source of light including a first orientation device that includes a latitude scale, a latitude pointer rotatable about a first axis relative to the latitude scale, and a platform configured to support an architectural model. T... | 02/25/2003 |
| 6367158 | Sundial A sundial for indicating the time of day using the position of the sun having a labyrinthine body with a plurality of pathways connecting a first and said second face, each pathway being adapted either to transmit said ray of light from an entry end at th... | 04/09/2002 |
| 6308427 | Horizontal sundial adjustable for accurate reading at multiple latitudes A horizontal sundial constructed to accurately tell time at a specific latitude having female threads incorporated into both the north (10) and south (12) sides of the dial plate (6). Threadedly matched male gnomon angle-adjusting bolts (18) serve to rais... | 10/30/2001 |
| 6301793 | Equatorial sundial apparatus utilizing one or more concave cylindrical focusing mirrors An equatorial sundial apparatus with an adjustable base assembly utilizing one or more concave cylindrical focusing mirrors. One of the benefits that is derived from this apparatus is the use of one or more concave cylindrical mirrors to project a focused... | 10/16/2001 |
| 6208315 | Antenna for reception of satellite broadcast An antenna for receiving a satellite broadcast can adjust orientation at higher precision than a method based on a compass and a level, without being influenced by environmental magnetic field generated by magnetic body or electromagnetic sources, can per... | 03/27/2001 |
| 6009628 | Triple projection surface sundial The present invention is a sundial having first and second spaced parallel planar projection surfaces, the first projection surface defining a summer projection surface and the second projection surface defining a winter projection surface. A gnomon exten... | 01/04/2000 |
| 5977922 | Satellite antenna alignment device A satellite antenna alignment device is described for use with a satellite antenna to enable the satellite antenna to be aligned with respect to a particular satellite. The alignment device is operatively secured to the support arm of the satellite antenn... | 11/02/1999 |
| 5732473 | Holographic sundial A holographic sundial comprising a hologram made using a holographic recording apparatus including a light-sensitive recording medium, a three-dimensional model, in one or more parts, bearing a plurality of indicia over a range of angles corresponding to ... | 03/31/1998 |
| 5596553 | Digital sundial A sundial gnomon including a first surface having a plurality of parallel first surface apertures transmissive to light and through which a plurality of sunbeams pass, and a second surface having a plurality of second surface segment apertures for regulat... | 01/21/1997 |
| 5590093 | Digital sundial A digital sundial displays the current solar time in digits, words, or pictures. Two closely-spaced parallel masks project different images depending on the angular position of the sun in the following way: The first mask, a regular array of thin vertical... | 12/31/1996 |
| 5459931 | Direction indicator A direction indicator includes a base defining four edges that extend parallel to a horizontal surface on which the base is placed and form portions of respective sides of a rectangle, a bearing indicator which is selectively positionable on the base for ... | 10/24/1995 |
| 5265345 | Universal sun-clock A universal sun-clock is described comprising a base, on whose surface there are present a sun-dial (consisting of a clock-face and a time-pointing tongue) and a reference mark for orienting the sun-clock according to the longitude and an upright (hinged ... | 11/30/1993 |
| 5197199 | Reflected 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 |
| 5181324 | Sundial A sundial including a strip-shaped body with surfaces substantially in the form of helicoids. The body is made of a rather thin material. At least one of the helicoids is provided with time markings. As a result, the sundial is very simple to manufacture,... | 01/26/1993 |
| 5097549 | Beach towel with symmetrical tanning device A beach towel or blanket with a metal eyelet on its bottom edge through which a decorative pivot dowel is passed and into the sand at the beach. Said towel is held, by one person, at the corners of the opposite end and rotated about the pivot dowel until the s... | 03/24/1992 |
| 5062212 | Sundial apparatus A sundial apparatus is arranged wherein a sundial head mounts a semi-cylindrical sundial face mounting a vertical and horizontal cross hair to define time of day, as well as an associated weekly period during a solar year. The sundial face is mounted with... | 11/05/1991 |
| 5056232 | Remote 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 |
| 4945644 | Hemispherical 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 |
| 4924592 | Plate sundial with installation indicia A typical plate and gnomon sundial with an enlarged dial plate and an extended gnomon is provided with latitude and longitude displacement indicia lines on the dial plate, beneath the gnomon and beyond the time indicia. A point is established on the gnomo... | 05/15/1990 |
| 4922619 | Universal sundial A sundial has a scale 3 on the inner face of a single-turn helix 1, and a gnomon 2 which is a rod or wire lying along its axis. The scale is linear and the instrument can be used at substantially any location, regardless of latitude or longitude. It can b... | 05/08/1990 |
| 4890269 | Heliochron A helichron having a box-like housing to which a cover is pivotally hinged. A magnetic compass is positioned in the box-like housing at a predetermined directional orientation. A 360 degree spirit level is also positioned within the box-like housing. The ... | 12/26/1989 |
| 4856912 | Combination beach towel and tote bag A beach towel which is selectively convertible to a tote bag or beach bag wherein the towel has upper and lower surface portions having a generally annularly oriented pull cord substantially confined therebetween but extending outwardly on opposite sides ... | 08/15/1989 |
| 4845853 | Sundial A sundial which is characterized by a selectively portable or permanent base and support bracket combination, which support bracket facilitates an angular movement for effecting latitude adjustment to the sun's path and includes a support bracket plate, a... | 07/11/1989 |
| 4835875 | Cylindrical sundial with installation indicia A universal sundial which indicates watch time is constructed from a standard pipe section or cylinder with one end an elliptical plane at an angle to the axis of the cylinder preferably within approximately 15° of the latitude of the proposed site. The ... | 06/06/1989 |
| 4785542 | Sundial A sundial which is characterized by a selectively portable or permanent base, a support plate hingedly connected to the base in adjustable angular relationship for effecting latitude adjustment to the sun's path and a connecting plate pivotally attached t... | 11/22/1988 |
