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...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.

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Class 337/182 - With external or auxiliary heating means


Subclass of Class 337 - Electricity: electrothermally or thermally actuated switches
Definition: Subject matter including significant details of heat concentrating
No. of patents: 18
Last issue date: 05/19/2009


NumberTitleIssue Date
7535332Protective element
A protective element has a heat-generating member and a low-melting metal member on a substrate, in which the low-melting metal member is blown out by the heat generated by the heat-generating member, wherein at least two strips of low-melting metal member are provi...
05/19/2009
7265653Method of providing a protective component with an adjusted time characteristic of the thermal transfer from a heating element to a fusible element
The invention relates to a method for producing a protective component, for example a fuse component or a fusing resistor, including a fusible element and a heating element, which are attached as stacking components to the surface of a substrate. The fusible element...
09/04/2007
7145431Thermistor having symmetrical structure
A thermistor is disclosed, which comprises a resistance element having upper and lower surfaces and showing a resistance varying characteristics according to the change of temperature; first and second conductive layers formed on the upper surface of the resistance ...
12/05/2006
7088216Protective device
Protective devices for preventing overcurrent and overvoltage are disclosed. The devices includes a base substrate, a pair of electrodes formed on the base substrate, and a low-melting metal element connected between the pair of electrodes to interrupt the current f...
08/08/2006
6937454Integrated device providing overcurrent and overvoltage protection and common-mode filtering to data bus interface
An electrical component includes a mounting substrate, a common-mode rejection filter mounted to the substrate, and at least one circuit protection element mounted to or formed by the substrate. The circuit protection element may provide a PPTC resistor element for ...
08/30/2005
6566995Protective element
A protective element contains a heat-generating member and a low melting metal member on a substrate, in which the low melting metal member is molten by the heat generated by the heat-generating member and flows onto electrodes, which causes the low melti...
05/20/2003
6556119High current intensity fuse device
The invention relates to a device for isolating an electric circuit, especially for high current intensities, with a housing (1) in which is provided at least one electrical conductor element (3) which presents an isolating area (9) and which can be wired...
04/29/2003
6538551Heat concentrating barrel for wire heater in dual element fuses
A dual element fuse includes a first conductive fuse coupler portion and an overload fusing assembly coupled to the first conductive fuse coupler portion. The overload fusing assembly includes a barrel having a flange at one end thereof, a trigger receive...
03/25/2003
6496098Pyrotechnic active element
A pyrotechnic active element for separating media and/or fluids has a base element (12) and an electrical ignition element (26) which is arranged on or in the base element (12). The pyrotechnic active element also includes a pyrotechincal charge (28) whic...
12/17/2002
6489879PTC fuse including external heat source
An improved PTC fuse assembly is described. The PTC fuse assembly includes a PTC fuse having a PTC material. To expedite heating of the PTC material, the improved PTC fuse assembly includes a die package in thermal communication with the PTC material. The...
12/03/2002
6344788Pyrotechnically operated electrical contactor
The present invention relates to electrical contactors used in electric motors comprising batteries. The present invention relates more specifically to an electrical contactor (1) for a battery, consisting of a hollow body (2) defining an upstream part (1...
02/05/2002
6281781Circuit breaker
The disclosed circuit breaker comprises a first connection terminal, a second connection terminal, a heat generating part having conductivity and disposed between the first connection terminal and second connection terminal, an igniting part igniting depe...
08/28/2001
6281782Circuit breaker
The circuit breaker disclosed in the invention comprises a first connection terminal, a second connection terminal, a heat generating part having conductivity disposed between the first connection terminal and second connection terminal, an igniting part ...
08/28/2001
6275136Circuit breaker
The circuit breaker disclosed in the invention comprises a first connection terminal, a second connection terminal, a rotatable conducting part disposed between the first connection terminal and second connection terminal, a heat generating part, an ignit...
08/14/2001
6157288Current breaking system for vehicle
An current breaking device is interposed between a battery for a vehicle and an electric load. When a circuit cut-off signal is generated from a control unit due to an automobile's collision, the current breaking device allows respective capsules 40 in a ...
12/05/2000
4328387Fail-safe thermostatically controlled circuit for use in apparatus for melting and dispensing thermoplastic material
A fail-safe thermostatically controlled circuit is disclosed for use in high-throughput thermoplastic material melting and dispensing apparatus including a hopper into which solid thermoplastic material is deposited for feeding the thermoplastic material ...
05/04/1982
4227169Combined thermal and electrical cut-off device
The device described herein is useful in applications which formerly required both a thermal cut-off device and an electrical fuse. This device will open an electrical circuit in response to either an increase in ambient temperature or an increase in elec...
10/07/1980
4124835Remotely controlled utility service interrupter system and apparatus
Apparatus for selectively disconnecting the electric service of individual customers from an electric power supply line by electrical signals transmitted from a central point remote from the customer's premises. A circuit interrupter, such as a circuit br...
11/07/1978
 
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