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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...
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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...
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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...
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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...
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7698825 |
Automatic 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...
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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...
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7555840 |
Omni-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...
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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...
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7506449 |
Measurement device
A measurement device comprising a horizontal track, at least one self-leveling foot coupled to the horizontal track, a hemispherical track coupled to the horizontal track, a movable sensor unit...
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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...
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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...
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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...
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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...
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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...
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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....
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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4782472 |
Solar clock with digital time display
A solar clock utilizes the sun's radiant energy to illuminate a digital display in accordance with the solar time. An opaque mask member, preferably in the form of a right circular cylinder, is...
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4656748 |
Sundial arrangement
The present invention relates to a sundial arrangement comprising a screen portion provided with several slits allowing the passage of a narrow flat beam of solar rays and angularly spaced from one...
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4645354 |
Universal heliochronometer
A heliochronometer (10) for providing accurate clock time readouts at any known latitude and longitude location on the earth including, a base (15) to effect precision orientation and level...
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4520572 |
Geographical sundial
A sundial comprising a transparent hollow globe marked with latitude and longitude lines and including a map of the world is mounted on a stationary base. The globe is adjustable with respect to...
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4387999 |
Electronic sundial apparatus
An electronic sundial apparatus which signals the passage of each hour by a chime, bell or other audible indication and which requires no external source of power other than the sun. Inner and...
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4384408 |
Columnar sundial
A columnar sundial utilizing the projection of the spot image of the sun through a nodus plate onto a translucent projection screen is disclosed. The projection screen is mounted on a support...
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4373270 |
Sundial
A sundial comprising a block of transparent material in the general form of a frustrum of a semi-cylinder, with first planar surface at an angle to the cylindrical axis that corresponds as nearly...
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4355470 |
Equatorial sundial
An equatorial sundial according to this invention includes a dial surface and an elongated, rod-like gnomon fixedly secured in operative relation thereto. The dial surface is generally...
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4333243 |
Latitude finder
An apparatus for indicating the latitude position of the user is disclosed. The apparatus comprises a base member carrying a scale having degrees of latitude marked on the scale. The base member...
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4135357 |
Solar chronometer
A solar chronometer in which a style is aligned with the celestial pole and an equatorial member, preferably in the shape of a ring, is aligned with the equator. The style and equatorial member...
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