Thomas Edison obtained a patent for an electrographic vote recorder.
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| Number | Title | Issue Date |
| 8127760 | Low-cost heliostatic mirror with protective inflation stabilizable surface element means Increased utilization of solar power is highly desirable as solar power is a readily available renewable resource with power potential far exceeding total global needs; and as solar power does not contribute to environmentally harmful pollutants associated with foss... | 03/06/2012 |
| 7997264 | Inflatable heliostatic solar power collector Increased utilization of solar power is highly desirable as solar power is a readily available renewable resource with power potential far exceeding total global needs; and as solar power does not contribute to pollutants associated with fossil fuel power, such as u... | 08/16/2011 |
| 6111190 | Inflatable fresnel lens solar concentrator for space power A novel, high-efficiency, extremely light-weight, inflatable refractive solar concentrator for space power is described. It consists of a flexible Fresnel lens, flexible sides, and a back surface, together enclosing a volume of space which can be filled w... | 08/29/2000 |
| 5404868 | Apparatus using a balloon supported reflective surface for reflecting light from the sun The invention provides a family of apparatus using a balloon supported reflective surface for reflecting light from the Sun. A basic embodiment of such an apparatus is a light weight, low cost heliostat using a balloon supported reflective surface. Anothe... | 04/11/1995 |
| 5365920 | Solar concentrator system The solar concentrator arrangement has a concentrating mirror (2) consisting of a metallised plastic shell to reflect parallel incident light. The concentrating mirror ( 2 ) forms part of a foil tube (1) and co-operates with a secondary concentrator (5) w... | 11/22/1994 |
| 4933020 | Solar installation A solar installation having a collector field having at least one of planar absorbers and solar cells, the collector field being fixed in non-trackable manner of the roof, reflecting surfaces extending laterally over and beyond the absorber surfaces in sh... | 06/12/1990 |
| 4815443 | Solar energy focusing assembly and storage unit A power system heat source applicable to spacecraft and the like is realized in a combination of an integrated solar absorber-thermal storage assembly 10 and a solar energy focusing unit 50. The focusing unit is capable of selectively functioning inflatab... | 03/28/1989 |
| 4546757 | Fixed position concentrating solar collector A fixed position concentrating solar collector in the form of a trough having an inner surface reflective to solar radiation and formed to direct the sun's rays entering the trough onto a radiation absorber element, the trough having end structures capabl... | 10/15/1985 |
| 4491125 | Solar collector A solar collector comprising a hemisphere (111) having a reflector internal surface; a caustical concentrator (116) located at the focus of the hemisphere (111) and having a concentrated second focus for radiation reflected onto its surface from said hemi... | 01/01/1985 |
| 4318394 | Solar energy concentrator A solar energy concentrator is provided which includes a flexible reflective surface to focus solar flux on absorber tubes. The surface is mounted above a plurality of partially evacuated chambers. As the relative position between the sun and the concentr... | 03/09/1982 |
| 4291680 | Double-walled glass solar energy collector This invention provides an improved solar collector of the type employing two concentrically disposed glass tubes having their axial end portions sealingly united to form a double-walled structure, with the annular space between the inner and outer glass ... | 09/29/1981 |
| 4271822 | Conversion of available energy A flexible concave reflector having a solar energy absorbing means at the focus is maintained in its concave shape by an inflatable cushion on the convex surface and by a donut shaped chamber about the periphery of the reflector. The donut shaped chamber ... | 06/09/1981 |
| 4160523 | Air structure An air structure comprises a double-skin wall construction having an outer skin that is substantially transparent to short wave solar radiation but relatively opaque to long wave heat radiation and an inner skin. Radiation converter elements, preferably i... | 07/10/1979 |
| 4051834 | Portable, linear-focused solar thermal energy collecting system A solar heat collection system is provided by utilizing a line-focusing device that is effectively a cylindrically curved concentrator within a protected environment formed by a transparent inflatable casing. A target, such as a fluid or gas carrying cond... | 10/04/1977 |
| 4002032 | Solar heated device A solar heated device including a conduit for expansion and flow of gases, and a solar light collector for heating the gas in the conduit, is provided with a gas turbine that is driven by the gas as it expands as a result of the solar heating. The conduit... | 01/11/1977 |