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"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 7570877 | Electric water heater that keeps the hot water at a preset temperature constantly An electric water heater includes a container, a cold water inlet pipe, a hot water outlet pipe, and a separation board. The separation board includes a first vertical plate having a first end connected to an upper portion of the container, a separation plate having... | 08/04/2009 |
| 7355148 | Temperature exchanging element made by extrusion, and its applications The invention relates to a temperature exchanging element made by extrusion and able to receive a heating element and/or heat conducting element, and radiation fins. It is constituted of a single-piece base incorporating an external face equipped with means to recei... | 04/08/2008 |
| 7239944 | Programmable lawn mower A robotic apparatus for traversing a selected area autonomously that senses orientation relative to the Earth's magnetic field or other “environmental” signals. The robotic apparatus is provided in two models, a master that can record directive and compass or ... | 07/03/2007 |
| 7114468 | Internal small volume storage water heater The invention concerns devices for water storage, heating and delivery. A storage water heater of the invention provides an amount of unmixed recently heated water from an internal small volume during a draw along with water from a main volume. When water is drawn f... | 10/03/2006 |
| 7103457 | Programmable lawn mower A robotic apparatus for traversing a selected area autonomously that senses orientation relative to the Earth's magnetic field or other “environmental” signals. The robotic apparatus is provided in two models, a master that can record directive and compass or ... | 09/05/2006 |
| 6810206 | Drain plug heater A water heater has a housing, a heating element, and an electric power cord secured to the housing and to a three-pronged plug configured for insertion into a standard electrical power outlet. The power cord is continuous from the housing to the three-pronged plug. ... | 10/26/2004 |
| 6786182 | Pressure control for household steam generator A household appliance for steam generation with a boiler containing a heating source for water vaporization intended to be partly immersed in water; a control means for adjusting the pressure valve of the steam in the boiler that operatively associated with the heat... | 09/07/2004 |
| 6643454 | Bath temperature maintenance heater A temperature maintenance heater assembly for maintaining the temperature of a heated fluid circulating through piping of a bath, including a pipe section, a base plate, a control assembly, a heater assembly cover, and a heating element. The heater elemen... | 11/04/2003 |
| 6418275 | Supply device for use with a hydrogen source This invention is related to a supply device for use with a hydrogen source, comprising: at least one pressurized bottled filled with metal hydride and having a bottom end and a port end; a gas discharge valve device provided at the port end; a receiving ... | 07/09/2002 |
| 6321036 | Electric water heater An electric water heater has a base, a tank mounted on the base, a partition wall mounted in the tank to divide the tank into a heating chamber and a reservoir and at least one electric heating element extending into the heating chamber. A cool-water supp... | 11/20/2001 |
| 6054692 | Heating device, heat storing type heat generating body and protective sheet for the heating device In a heating device used for melting snow on a road, a roof or the like, or for room heating of in-door facilities, in order to heat a to-be-heated or heated object uniformly over its entire area and enable to utilize effectively a PTC heater, a heat diff... | 04/25/2000 |
| 5574822 | Compact electric water heater A water heater including a steel water tank having a bottom plate and a deep drawn body portion welded together, the tank having a glass lining and openings to receive and discharge water; foam insulation surrounding the body portion; an outer covering su... | 11/12/1996 |
| 5553578 | Washerless block heater A washerless block heater for automotive engines includes an externally threaded nipple surrounded by a sharp shoulder, which shoulder is provided with a pair of forwardly facing ribs. When the nipple is screwed into an engine block the ribs form a seal w... | 09/10/1996 |
| 5386100 | Control arrangement for immersion liquid heaters An electric immersion water heater comprises a vessel with a heating element having cold tail ends extending individually through a side wall of the vessel. Temperature sensing elements sense temperature levels of an outer wall of the heating element outw... | 01/31/1995 |
| 5058195 | Thermistor mounting arrangement An elongate hollow tubular assembly mounts a temperature sensing element in a reservoir to determine the temperature of a liquid in the reservoir. The tubular assembly includes an inner tubular member constructed of a thin, light-weight, electrically insu... | 10/15/1991 |
| 5021633 | Engine block heater It is difficult if not impossible to install conventional engine block heaters robotically. The present device includes a cylindrical body with a heater element extending upon one side thereof and operatively connected to terminals on the other side there... | 06/04/1991 |
| 5003999 | Apparatus for treating silicon wafers in an acid bath An apparatus for treating silicon wafers in an acid bath, comprising at least one advantageously quartz tank (1) for containing an acid in which the wafers are immersed and with which electrical resistors (14) are associated for heating the acid, the tank... | 04/02/1991 |
| 4978832 | Pressurization of liquid carbon dioxide cylinder A positive-acting mechanism for pressurizing a liquid CO2 storage cylinder involves a sealed tube suspended from the cylinder top and extending down into the bottom of the cylinder. The sealed tube contains an electric heating element and a tem... | 12/18/1990 |
| 4822980 | PTC heater device A heating device adapted to be disposed in an opening in the side wall of a compressor that is used with an air conditioner or refrigerator so that fluids in the casing of the compressor can be vaporized. The heating device includes a PTC thermistor dispo... | 04/18/1989 |
| 4658117 | Food warmer with removable electric heater A apparatus for maintaining precooked food at a desired temperature includes a stationary hollow housing mounted in the bottom part of a warmer for holding a quantity of food. The housing defines a cylindrical passage having an entrance through a wall of ... | 04/14/1987 |
| 4593178 | Removable electric heating assembly for fluid heaters and boilers A fully removable heating element assembly for use in fluid heaters and boilers, such as the boiler contained in a CO2 removal air purification system employing a monoethanolamine (MEA) solution, includes a rectangularly shaped housing open on ... | 06/03/1986 |
| 4506140 | Electric immersion heater assembly having an isolated terminal box An electric heater adapted to be extended through an aperture in a tank wall for immersion in a fluid to be heated includes an elongated heater block structure formed by a metal core cast in a tubular metal shell. The core has a plurality of axially exten... | 03/19/1985 |
| 4375589 | Diesel fuel tank having removable electric immersion heater assembly A diesel fuel tank has an opening in the top wall through which an electric immersion heater assembly is inserted into the tank to heat the contents thereof. The immersion heater assembly includes an outer tubular member arranged vertically in the tank an... | 03/01/1983 |
| 4124793 | Aquarium water heater An aquarium water heater having a heater element energized by first and second silicon-controlled rectifiers connected in parallel in opposing conductive relation, one rectifier providing energy to the heater element on one-half cycle of alternating curre... | 11/07/1978 |
| 4039737 | Electric immersion heating apparatus and methods of constructing and utilizing same An electric immersion heating apparatus is provided which includes a first tubular electrode which holds a semiconductor substance such as glass or borate lithium oxide therein. Immersed in the semiconductor is at least one other second electrode whose po... | 08/02/1977 |
| 3983361 | Electric heating apparatus for heating corrosive solutions A pyrex tank for heating corrosive solutions is formed with a main body portion having an open top and with a small annular cavity portion depending from the bottom of the main body portion. A heater unit comprising a heating element enclosed in a quartz ... | 09/28/1976 |
