U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Bizarre Patents

Patent No. 5996127

Wearable Device For Feeding and Observing Birds and Other Flying Animals

A device for feeding and observing flying animals comprising a hat, a support mounted on the hat and extending outward from the hat, and a feeder mounted on the support.

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 338/287 - Compound or multiple zigzag


Subclass of Class 338 - Electrical resistors
Definition: Subject matter wherein the resistance element is shaped
No. of patents: 32
Last issue date: 01/25/2011


NumberTitleIssue Date
7876195Fan resistor
A fan resistor is formed with a resistive pattern of electrically conductive material sandwiched between two panels of thermally conductive material. An insulating barrier on each surface of the resistive pattern electrically insulates it from the thermally conducti...
01/25/2011
7408437Resistance element, its precursor, and resistance value adjusting method
An object of the invention is to provide a resistor element that makes it possible to adjust the resistance value of a precursor easily in producing a resistance element having a target resistance value from the precursor, as well as to the precursor and a related r...
08/05/2008
7071446De-icing, snow melting and warming system
A de-icing, snow melting and warming system is taught which utilizes a heatsink (20) consisting of a number of board strips disposed in a planer array positioned within a building structure between its exterior and interior surface. The heatsink board strips ...
07/04/2006
6924726Liquid-cooled high-power resistor
A high-power resistor comprises a plurality of resistor elements (1), made of sheets of an electrically conductive resistance material, with a first (13) and a second (14) terminal. The resistor elements are mutually separated by disc-shaped ins...
08/02/2005
6452477High voltage low inductance circuit protection resistor
A high voltage low inductance resistor (120) includes a resistor body (122) having a perimeter and a center. A first terminal (126) is located away from the center of the resistor near the perimeter of the body (122). A serpentine resistance element (130)...
09/17/2002
6441718Overlay surface mount resistor
A surface mount resistor includes an elongated piece of resistive material having strips of conductive material attached to its opposite ends. The strips of conductive material are separated to create an exposed central portion of the resistive material t...
08/27/2002
6292091Resistor and method of adjusting resistance of the same
A resistor includes an insulating substrate, a resistive layer formed on the substrate, and first and second terminal electrodes connected to the resistive layer. The resistive layer is divided into at least a first portion of greater resistance and a sec...
09/18/2001
6232869FBT, its bleeder resistor, and device for coupling bleeder resistor
An FBT (fly-back transformer), its bleeder resistor (installed on the top of the FBT), and a device for coupling the bleeder resistor are disclosed. The bleeder resistor 100 is accommodated within a resistor case 180, and the resistor case 180 is installe...
05/15/2001
5929746Surface mounted thin film voltage divider
A surface mounted thin film precision voltage divider is provided by incorporating two resistors on a single base of the same size and configuration as prior art surface mounted thin film precision resistors. Because the resistors were made at the same ti...
07/27/1999
4929923Thin film resistors and method of trimming
A resistor having a first portion of a high resistivity material and a second portion of a low resistivity material and laser trimming the low resistivity material portion....
05/29/1990
4804940Resistor and electron device employing the same
A resistor is provided with a plurality of turn parts whose corners have an obtuse flexional angle in order to improve the relative resistance precision. A ladder resistor can be formed with a plurality of such resistors connected in series, and various e...
02/14/1989
4649368Electrical resistance heating element
A resistance heating element of the ribbon type for use in a high temperature electric furnace. The element has the same curved cross-sectional configuration throughout its entire length to give it strength and stiffness and permits the element to be bent...
03/10/1987
4575619Electrical heating unit with serpentine heating element
A heating unit combining a block of thermal and electrical insulating material and an electrical resistance element in which the block contains a mass of ceramic fibers bound together and has an elongated slot with confronting walls rising to the surface ...
03/11/1986
4568908Compact resistor assembly
The resistor assembly includes a plurality of resistor sections each in the form of resistive plates in which slots have been cut to provide a continuous resistive element of low inductance. The resistor sections are stacked together with thin insulating ...
02/04/1986
4553126Resistance heating element
Resistance heating element, with a heat conductor led in meander pattern, which is fastened in the zone of the meander arches in bearing elements, characterized in that between the bearing elements there is arranged a heating conductor of at least one one...
11/12/1985
4553125High voltage resistance element
A resistance element capable of withstanding a high voltage is formed through impurity diffusion in a single crystal island of a semiconductor integrated circuit substrate. The resistance element includes a resistive region formed in an exposed surface of...
11/12/1985
4516108Electrical resistor of stretched sheet metal
Electrical resistor of sheet metal, of the type having two U-shaped stiffeners mounted on the edges of the resistor. It is made by cutting a sheet to constitute conductors (6) going from one edge to the other of the resistor, which are connected two by two in ...
05/07/1985
4463338Electrical network and method for producing the same
An electrical network containing at least one electric resistor, includes a support foil and at least one resistance layer coating the support foil forming the at least one electric resistor. The support foil and resistance layer are folded along a zig-za...
07/31/1984
4433233Silicon carbide heating elements
An electrical resistance heater or igniter characterized by having a core bonded by regrowth of silicon carbide is produced by heating particulate silicon carbide which may be mixed with a minor amount of modifying agent, by means of an uncharged beam of ...
02/21/1984
4398082Heating apparatus
An improved heating apparatus for heating a small room or confined space has an electric heater element affixed to a mounting frame assembly by means of notched heater element supports. The notched heater element supports are operably disposed within slot...
08/09/1983
4328529Silicon carbide igniters
An electrical exceptance heater or igniter characterized by having a core bonded by regrowth of silicon carbide is produced by heating particulate silicon carbide which may be mixed with a minor amount of modifying agent, by means of an uncharged beam of ...
05/04/1982
4322605Heating device for skin packaging machine
A heating device (20) is provided that may be utilized in either a film packaging machine or a thermoforming machine. Heating device (20) includes a frame (32) that carries a plurality of eyelets (36) that are utilized to suspend an elongated ribbon heati...
03/30/1982
4161648Electrical radiation heater for a glass ceramic plate
An electrical radiation heater for a glass ceramic plate, which serves as a cooking plate, comprises an electrical heating strip mounted on an insulating sheet. The heating strip is slit alternately from opposite edges to give it a zig-zag shape and is be...
07/17/1979
4157529Lead for resistor element
A resistor device of simple construction particularly adapted for use as a precision, low ohmic value resistor. The terminal leads are axially aligned and extend outwardly from a molded housing. The inner end of each lead is shaped into a flat surface to ...
06/05/1979
4136274Thermal head for a printer
A thermal head for a thermal printer having a dielectric support and a plurality of conductive layers made of a single material has been found. Said conductive layer comprises a pair of lead lines at both the extreme ends of the same and a heater line for...
01/23/1979
4123741Resistance element for variable resistors
A resistance element for obtaining a continuous and linear output characteristic is obtained by the combination of a zig-zag resistance element and a resistance film of higher resistivity disposed thereover....
10/31/1978
4123742Variable resistor
A variable resistor has an insulating substrate plate, a resistance body formed on the substrate plate and a slider adapted to slide along the resistance body. The resistance body is formed in a winding pattern to provide a larger range of variation of re...
10/31/1978
4070641Current limiting circuit breaker
An iron wire resistor connected in shunt with the current limiting contacts of a circuit breaker. The current limiting contacts are in series with the main contacts of the breaker, and are separated by extremely high fault currents before the main contact...
01/24/1978
4064477Metal foil resistor
The present device is a high reliability resistor comprising a sheet of metal foil secured to the flat side of a substrate and with the opposite side of the substrate formed to dissipate heat into the ambient thus enabling the present resistor to have an ...
12/20/1977
3997761Self-cleaning food supporting grill
A simple, relatively electrically safe self-cleaning food supporting grill construction comprising a serpentine steel tubing for supporting food over a cooking fire and through which an electrical current from a conventional household electrical supply is...
12/14/1976
3949345Multiple magnetoresistance element
A multiple magnetoresistance element includes a first stripe group and a second stripe group which comprise a plurality of stripes electrically connected in series with each other and spaced from each other by a predetermined distance. The stripes are mad...
04/06/1976
3949346Magnetoresistive element
A magnetoresistive element comprising a substrate, a first conducting ferromagnetic film strip having current carrying ability predominantly in one direction, a second current carrying ferromagnetic metal film strip on said substrate having a current carr...
04/06/1976
 
Sign InRegister
Username  
Password   
forgot password?