Famous Patents
The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
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.
| Number | Title | Issue Date |
| 8143990 | Micro-fluidic bubble fuse A microfluidic bubble fuse is formed from a hermetically sealed reservoir containing an electrically conductive liquid. The reservoir is interposed between a pair of electrodes such that each electrode is in electrical contact with the fluid within the reservoir, an... | 03/27/2012 |
| 7315228 | Electro-magnetically enhanced current interrupter The present invention provides an apparatus and method of interrupting the current in a circuit wherein the magnetic pressure induced by current flow through a conductor causes the conductor to flow and thereby open the associated circuit. Magnetic pressure may be d... | 01/01/2008 |
| 7139158 | Method and apparatus for current limiting by means of a liquid metal current limiter A method and an apparatus are disclosed for current limiting, as is a switchgear assembly having an apparatus such as this. Liquid metal is passed along a resistance element for the current limiting path, in order to achieve current limiting without any arcs for net... | 11/21/2006 |
| 6850145 | Self-recovering current-limiting device with liquid metal A self-recovering current-limiting device with a liquid metal includes a first and a second electrode for connection to an electric circuit to be protected. Each of the first and second electrodes are made of a solid metal. A plurality of pressure-resistant insulati... | 02/01/2005 |
| 6797901 | Switch device and method of making same The switch device comprises a pair of cavities, an elongate passage, a non-conductive fluid having a high electrical resistance, a conductive fluid having a high electrical conductivity and an electrical path. The passage is in fluid communication with the cavities ... | 09/28/2004 |
| 6714115 | Self-recovering current limiting device with liquid metal A self-recovering device current limiting device with liquid metal includes two solid metal electrodes for connecting to an electric circuit to be protected. Several compression chambers partially filled with liquid metal are arranged one after the other between the... | 03/30/2004 |
| 6621401 | Self-recovering current limiting device having liquid metal A self-recovering current-limiting device with a liquid metal includes two T-shaped electrodes for connection to an electric circuit to be protected. Each of the electrodes are made of a solid metal. Several compressor cavities which are partially filled ... | 09/16/2003 |
| 6603384 | Self-recovering current-limiting device having liquid metal A self-recovering current-limiting device having liquid metal includes solid metal electrodes for connecting to an external electric circuit to be protected. A plurality of compression spaces which are partially filled with liquid metal are arranged one b... | 08/05/2003 |
| 6600405 | Self-regenerating current limter with liquid metal A self-regenerating current limiter with liquid metal includes solid metal electrodes for connection of the current limiter to an electric circuit to be protected. A plurality of compression chambers that are partially filled with liquid metal are located... | 07/29/2003 |
| 4259593 | High voltage control devices High voltage control devices are provided comprising a housing, an aprotic liquid contained within said housing, means for effecting heat exchange with said liquid, at least two spaced electrodes contained within said liquid and each of said electrodes ex... | 03/31/1981 |
| 4252869 | By-pass for internally open-circuited cells If one of a series string of battery cells fails on open circuit, the circuit through all of the cells is broken. An automatic means for by-passing the failed cell maintains the circuit and allows operation of the string to continue (at a lower no-lead vo... | 02/24/1981 |
