Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 6864467 | Heater for gaseous media An electric heater for gaseous media with at least one support plate and at least one helix of corrugated, electric resistance heating wire wound continuously around the support plate and whose turns are held by means of heating wire bend-offs on the longitudinal ed... | 03/08/2005 |
| 6732450 | Electrothermal rack of hair dryer An electrothermal rack of a hair dryer includes a main body including a plurality of support wings each having a mediate portion formed with a positioning section formed with a plurality of inner insertion recesses. Each of the support wings has an outer side formed... | 05/11/2004 |
| 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 |
| 5331305 | Chip network resistor A chip network resistor includes a plurality of discrete electrodes and common electrodes which are connected to a plurality of resistance elements according to a predetermined pattern. The configuration of the common electrodes is larger more than that o... | 07/19/1994 |
| 4881407 | Hot wire air flow meter The bobbin (21) of the heating resistor (1) is made by zirconia or glass fiber. On the surface of the bobbin, a platinum film (31) or a platinum wire (23) are formed. At both ends of the heating resistor, the heating resistor is supported by a pair of sup... | 11/21/1989 |
| 4762980 | Electrical resistance fluid heating apparatus Apparatus for electrically heating a fluid medium includes a housing (18) having an inlet channel (54) and an outlet channel (60) communicating with a central passage (62). A heating cartridge (38) is resident in the central passage (62) and has a web (90... | 08/09/1988 |
| 4736092 | Braze heater assembly and method An improved heater assembly and method for applying a brazing heat across a selected longitudinal section of a tube is disclosed herein. The heater assembly generally comprises a heater mandrel having an electrical resistance heating element coiled therea... | 04/05/1988 |
| 4733055 | Heat transfer heating element and method An electric heating element with a resistance element, a metal sheath in heat transfer relation to the resistance element on one side of the sheath and a thin, dry coating of refractory material major proportion by weight of which is boron nitride on anot... | 03/22/1988 |
| 4656340 | Heater coil mounting A heater coil mounting is provided by means of a bracket having seats formed at or adjacent each axial end and into which an insulator through which the heater element passes, is adapted to be received. The bracket is mounted in position on a wall using t... | 04/07/1987 |
| 4523177 | Small diameter radiant tube heater Small portable electrical resistance heated radiant heating unit useful for insertion in tube bores to effect localized high temperature heating. Useful for the internal heating of tubes and tube/sleeve assemblies in steam generators, having bores as smal... | 06/11/1985 |
| 4504731 | Electric hotplate An electric hotplate has a hotplate body with a closed cooking surface made from an iron-based sintered material with additions of other metals. The sintered material hotplate body has a plurality of narrow, flat slots on its bottom, in which is inserted an un... | 03/12/1985 |
| 4445024 | Electric kiln This invention relates to a new type of electric kiln suitable for the firing of pottery in small batches as is customarily carried out by hobbyists. In its preferred form the invention comprises an upright cylindrical wall of ceramic fibre thermal insula... | 04/24/1984 |
| 4393299 | Electric radiant heater unit for a glass ceramic top cooker An electric radiant heater unit for a glass ceramic top cooker includes an inner circular heating coil and an outer annular coil surrounding the circular coil. The two coils are separated by a dividing wall of thermal insulating material and the annular c... | 07/12/1983 |
| 4357521 | Electrical heating device for fluid media A form of electrical heating device, which is particularly applicable to hair driers but may also be useful in fan heaters or other electrical heaters for gaseous or other fluid media, comprises an insulating support plate around which a resistance heatin... | 11/02/1982 |
| 4337390 | Electric heating element An improved electrical heating element is constructed to increase the amount of electrical wire per unit space available for plug-type convection heating units. The heating element includes a metal frame structure with a plurality of spaced support elemen... | 06/29/1982 |
| 4320253 | Ceramic beads for heaters A heating element comprising a plurality of ceramic components strung together on a heating wire to form a flexible structure, adjacent ceramic components comprising integrally formed mating projections and depressions. The element comprises ceramic compo... | 03/16/1982 |
| 4313049 | Electrical heating element for fluid media A heating element (for a hair dryer, fan heater or other electrical appliance) in which the turns of resistance heating wire are held in place, in edge recesses of support plate means, by a strip of heat-resistant cement applied to the supporting edges an... | 01/26/1982 |
| 4309595 | Hair dryer A hand held hair dryer housing with a relatively small open end and a relatively large opposite open end, heater means, and a reversible motor-driven fan for selectively providing either a concentrated or a diffused flow of heated air through said small o... | 01/05/1982 |
| 4239955 | Effusion cells for molecular beam epitaxy apparatus The effusion cell for molecular beam epitaxy apparatus consists of a pyrolytic BN cylindrical crucible surrounded by a heating coil. The position of the heating coil is maintained by a plurality of ceramic rods extending parallel to the cylinder axis with... | 12/16/1980 |
| 4191880 | Heating element for electrical appliance having a blower A heating element for electrical appliances which include a meander-form winding of resistance heating wire, two or more supporting plates arranged parallel to an incident flow direction of air produced by the blower and having openings in which turns of ... | 03/04/1980 |
| 4038628 | Electric resistor An electric resistor assembly for use in motor starters or other electric apparatus characterized by an elongated mounting strap having terminals at both ends respectively for panel mounting, a plurality of insulating refractory bodies on the strap in end... | 07/26/1977 |
| 4001761 | Helical resistor and method for assembling A power resistor including a resistance element of metal ribbon formed into an edgewound helix, and an internal three-point support structure axially disposed within the interior of the helix. The support structure includes three insulating assemblies eac... | 01/04/1977 |
| 3955065 | Hand held electric hair-dryer A hand-held hair-dryer comprises a substantially spherical casing containing an electric heating element associated with an impeller driven by an electric motor. The casing comprises first and second hemispherical caps joined together to form a spherical ... | 05/04/1976 |
