Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Switching mechanism and electric switch using the same










Image Number 18 for United States Patent #6664490.

An AC/DC switch for electric power tools avoids bouncing when turned on, but assures quick cutting-off of heavy current. Operation does not vary with age, as might be caused by wearing of projections of the switching mechanism and/or inconsistency in spring material. A reversal spring quickly switches the mechanism on and off so that the movable contacts are brought close to the stationary contacts before the turning-on, thereby permitting the turning-on subsequent to traverse of the reversal point without bouncing of the movable contacts from the stationary contacts, and preventing movement of the movable contacts before reversal spring has stored increased energy, thus allowing quick release of stored energy to make the movable contacts leave the stationary contacts at a speed sufficient to prevent electric arcs between the movable and stationary contacts, and hence prevent the wearing of the contacts.








 
 
  Recently Added Patents
Method and system for evaluating/analyzing patent portfolio using patent priority approach
PMI feedback with codebook interpolation
Method and system for implementing power detection
Milk frother
Cabinet door with tread pattern
Semiconductor devices having multi-width isolation layer structures
Imaging lens with three lens elements, and electronic apparatus having the same
  Randomly Featured Patents
Tire parameter monitoring system with sensor location using RFID tags
Audio processing apparatus
Snow, ice and/or moisture sensor
Outward opening valve system for an engine
MIMO wireless communication system and method by a plurality of base stations and mobile station
(20S)-1.alpha.-hydroxy-2-methylene-19-nor-bishomopregnacalciferol and its uses
Cycolalkylated B-glucoside
High speed drill reamer
N-phenylpyrazole-based antiparasitic external device for cattle, in particular ear-rings
Method for assembling an inkjet printhead