Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 8184962 | Mobile device for heating rooms A mobile device for heating rooms, comprising radiant elements, each provided with two heat-conductor plates associated with each other to define a central portion and connected fluid-dynamically with each other by means of connection elements. A heated heat-carryin... | 05/22/2012 |
| 7403702 | Secure mounting arrangement for U-shaped bolts and other device A U-shaped bolt including a closed end and two legs at an open end is self-retaining on a first object. The U-shaped bolt includes projections forming an opening to the closed end adapted to be smaller than the width of the first object. The projections retain the U... | 07/22/2008 |
| 7388176 | Heating device with thin heating boards A heating device includes a case having a plurality of openings and a plurality of slits are defined in bars of the case so that a plurality of heating boards are engaged with the slits of the case at an equal distance. A power control device is connected to the cas... | 06/17/2008 |
| 7180039 | Heater with burnout protection A heater is provided that has a temperature sensing control system which can be used for both temperature control and over-temperature protection against element burnout. The temperature control system is comprised of an inlet temperature sensing assembly positioned... | 02/20/2007 |
| 7161462 | Gas permeable resistor casing A resistor apparatus for containing broken pieces of an overheated resistor body is provided. The resistor apparatus includes a resistor body and a first and second lead wire electrically connected to opposite sides of the core. A gas permeable containment casing su... | 01/09/2007 |
| 7119308 | Forced-air heater control system and method The present invention relates to a forced-air electric heater control system for HVAC systems. One embodiment utilizes two heat sensors which are positioned upstream and downstream, equidistant from the heating element(s). The control system, in this embodiment, tak... | 10/10/2006 |
| 7109447 | Control system for cooking appliance employing convection and radiant cooking A cooking appliance includes a heating system which is preferably capable of combining radiant, convection, microwave and conduction heating techniques to perform a cooking operation. The cooking appliance includes a convection fan and at least one heating device. A... | 09/19/2006 |
| 7109444 | Electronic control circuit for household appliances including humidifiers An electronic control circuit for use with a heater, a fan, a humidifier, a cooking apparatus, or any device utilizing a power mode switch and a condition sensor, and optionally time-automated switching of modes of operation. The circuit includes a single control sw... | 09/19/2006 |
| 7012223 | Forced-air heater control system and method The present invention relates to a forced-air electric heater control system for HVAC systems. One embodiment utilizes two heat sensors which are positioned upstream and downstream, equidistant from the heating element(s). The control system, in this embodiment, tak... | 03/14/2006 |
| 6987250 | Control circuit for kitchen appliances An electronic control circuit for use with a heater, a fan, a humidifier, a cooking apparatus, or any device utilizing a power mode switch and a condition sensor, and time-automated switching of modes of operation. The circuit includes a single control switch to man... | 01/17/2006 |
| 6965731 | Convectional radial electric warmer A conventional radial electric warmer includes an upper and a lower support base, plural heaters, a protective net, and an upper, a front and a rear cover. The upper and the lower support base respectively have a fixing frame for the heaters, and plural holes for ho... | 11/15/2005 |
| 6960745 | Electronic control circuit An electronic control circuit for use with a heater, a fan, a humidifier or any device utilizing a power mode switch and a condition sensor, the electronic control circuit including a single control switch for controlling both power output and responding to a sensed... | 11/01/2005 |
| 6624394 | System for obtaining a uniform air temperature in a discrete space A system for supplying air to a discrete space to obtain a desired set point temperature within the space includes a plurality of units for conditioning the air in the space. Each of the units has an independent electric power supply cord for connection t... | 09/23/2003 |
| 6570139 | Electronic control circuit An electronic control circuit for use with a heater, a fan, a humidifier or any device utilizing a power mode switch and a condition sensor, the electronic control circuit including a single control switch for controlling both power output and responding ... | 05/27/2003 |
| 6526227 | Radiant electric heater A radiant electric heater is disclosed having an auxiliary reflector in front of a halogen lamp. The heater includes a ceramic base defined with clampling grooves for directly clamping terminals of the halogen lamp. The auxiliary reflector has a concave s... | 02/25/2003 |
| 6453121 | Radiant heater with subsidiary reflecting plate adjacent halogen lamp An electric heater is provided having a heat source mounted in a reflecting plate, a safety cage at the front surface of the reflecting plate, a halogen lamp fixing plate to which a halogen lamp is fixed horizontally, another reflecting plate at a positio... | 09/17/2002 |
| 6351602 | Upright radiant electric heating appliance An upright radiant electrical heater has a reflector assembly supporting a vertically-extending heating element assembly that radiates energy through substantially 360 degree. The reflector assembly includes heat reflective panels that disperse heat horiz... | 02/26/2002 |
| 6304719 | Radiant heater with halogen lamp Disclosed herein is a radiant heater with a halogen lamp. The heater includes a base connected to a power supply cord. A power shut-off switch is mounted on the bottom of the base. A support column is mounted on the top of the base and provided with a hei... | 10/16/2001 |
| 6289175 | Independently operating portable radiator A portable radiator has a radiator body whose radiating members are defined by first and second metal plates which together define central portions in which a heating fluid is displaced convectively, the radiating members communicating with each other thr... | 09/11/2001 |
| 6263157 | Independently operating and mobile radiator and process for its manufacture The independently operating and mobile radiator including a body having a plurality of radiating members each defined by a first metal plate and a second metal plate mutually associated and by a central portion wherein heated fluid circulates at a tempera... | 07/17/2001 |
| 6233397 | Dual power rated electric heater A portable heater operates at a first power rating to rapidly heat a space and a second power rating, lower than the first, to safely maintain the temperature of the space. The heater uses a first resistive heating element and a second resistive heating e... | 05/15/2001 |
| 6215956 | Reciprocating radiant electric heater An electric heater with a post and a heating member; which comprises an orientation device comprising a pole or spindle fixed on the post; a movable plate formed with front and rear holes and rotatably mounted on the pole or spindle through its front hole... | 04/10/2001 |
| 6205290 | Electric heater with heat sink members An electric heater includes a receiving chamber, heat sink members, electric heating pipes and a control portion. The receiving chamber and heat sink members are formed from extruded aluminum members. The heat sink members are sequentially arranged at bot... | 03/20/2001 |
| 6188836 | Portable radiant heater with two reflectors A portable radiant heater comprises an electrically energized heating element extending along a vertical axis. A first, multi-faceted, concave reflective surface is positioned to the rear of the heating element. A second reflector is positioned forward of... | 02/13/2001 |
| 6169851 | Space heaters A space heater is disclosed, comprising a housing, a heat source within the housing and a plurality of openings to allow the convection of air through the housing, in which: the heat source comprises a pair of panels defining between them a closed compart... | 01/02/2001 |
| 6167196 | Radiant electric heating appliance A portable electric space heater having a power cord with a male electrical plug and having easily replaceable quartz heating elements so that an unskilled person can remove and replace a heating element with a minimum of time, tools and skill. The heatin... | 12/26/2000 |
| 6091888 | Portable environmental conditioning device with presence detector responsive shutoff An appliance includes a housing defining an air inlet and an air outlet facing opposite to the air inlet, an inlet detector for detecting objects in an inlet zone projecting away from the inlet and an outlet detector for detecting objects in an outlet zon... | 07/18/2000 |
| 5838878 | Portable quartz heater A portable electric heater including a housing having a bottom wall with front and back portions, a rear wall, a pair of side walls each having front and back portions, a top wall with front and back portions, a divider wall having a given area, and a fro... | 11/17/1998 |
| 5805767 | Electronically-controlled heater A heater, especially a portable electric space heater, that includes safety features selected from at least one of the following, which may turn off the heater or trigger an alarm or both: motion sensors for determining whether an object is within an unsa... | 09/08/1998 |
| 5761377 | Tower type portable radiant heater A portable heater providing both radiant and forced air heat includes a plurality of vertically oriented, horizontally spaced apart quartz heating tubes is partially surrounded by a common reflector configured to open at an obtuse angle at each quartz tub... | 06/02/1998 |
| 5641420 | Electric heater having coil with loop that passes through aperture in support A heater element assembly for an electric heater, with a first and a second spaced element support. The first spaced element support has a peripheral edge surface and first and second slots extending inwardly from the edge surface, and an aperture therebe... | 06/24/1997 |
| 5495888 | Heater control A heater control for controlling operation of a heater switch (12) in an evaporative cooler having an alternative heater mode in which a heater element (40) is energized and part of the air flow is blanketed by a shutter (37) controlled by a slide (24) or... | 03/05/1996 |
| 5437001 | Upright radiant electric heating appliance An upright radiant electrical heater has a reflector assembly supporting a vertically-extending heating element assembly that radiates energy through substantially 360 degree. The reflector assembly includes heat reflective panels that disperse heat horiz... | 07/25/1995 |
| 5361321 | Portable electric heater deenergized by a tip-over responsive actuator A portable electric heater including a housing having a rear wall, a substantially planar front wall, a bottom support and a top wall. Retained by the housing are a resistive heating element and an electrical circuit for connecting the heating element to ... | 11/01/1994 |
| 5334818 | Modular high density electric heating element arrangement for an air flow heater A heating element for an air flow comprises a channel shaped bracket including a base and side walls at right angles thereto within which is mounted a pair of mica sheets arranged parallel to the base and at right angles to the sides and connected to the ... | 08/02/1994 |
| 5235668 | Portable electric space heater with air cooled outer wall surfaces An electric heater with thermal self-circulation of the room-air which is heated by means of electric resistors (7) placed in the core (6) of the heater. The heater is made of three or four casing elements (1) at the corners of which vertical gables (2) f... | 08/10/1993 |
| 5197111 | Convection heater with heating elements arranged in a stair step configuration An electric convection space heater for placement adjacent to a wall includes a plurality of elongated electric heating elements positioned in an elongated housing having a front panel having an elongated cold air inlet, a back panel for placement adjacen... | 03/23/1993 |
| 5174048 | Carpet dryer An improved carpet dryer is disclosed for drying carpets saturated with water. The dryer includes a securing mechanism for maintaining the edge of a carpet on the upper surface of the air outlet portion of the device. The device further incorporates a shr... | 12/29/1992 |
| 5095559 | Heating apparatus A heating apparatus comprises a closed vessel having thermally conducting walls and containing a gas that is heated by one or more electrical heating elements in the vessel. The vessel is received in a duct through which air is blown. The air is heated by... | 03/17/1992 |
| 4912300 | Control device for heating appliance having two operating regimes The control device (25) comprises a thermostat (15) interconnected between a supply source (S) and a heating resistor (4) which comprises two heating elements (41, 42), one of which (42) is supplied only during one of the heating regimes. A temperature li... | 03/27/1990 |
