Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 6405597 | Flip-chip mounted pressure sensor A device for measuring pressure in a space includes a semiconductor component suitable for measuring pressure that is positioned in the space and that has connecting pads for flip-chip mounting, a support element with a flat surface carrying a pattern of ... | 06/18/2002 |
| 4600164 | Safety seat belt system and latch release mechanism used therein An over-the-shoulder automotive safety seat belt system having a latch providing a tensionless comfort setting for the belt during use and having remotely operable thermostat metal means to release the latch and permit automatic belt retraction after use ... | 07/15/1986 |
| 4270544 | Medical electrode having improved adherence characteristics A medical electrode unit has a dielectric body formed with a cavity therein in which are mounted a sensory electrode accessible from one side of the body, and a foam pad, having a surface adjacent an opposite side of the body. The foam pad is saturated wi... | 06/02/1981 |
| 4260862 | Condition responsive apparatus having an improved motion transfer member A pressure responsive electrical switch uses precalibrated snap acting monometallic or bimetallic discs freely disposed in a disc seat formed on a base member. Over pressure protection in the form of a surface spaced just beyond the normal snapped positio... | 04/07/1981 |
| 4254309 | Snap-through characteristic keyboard switch A keyboard switch actuating element having a concave central portion and a lip located at the periphery of the actuating element for providing a snap-through characteristic when the actuating element is disposed even over a smooth surface and the actuatin... | 03/03/1981 |
| 4253064 | Liquid level sensing system A system for determining the presence or absence of coolant liquid as well as for monitoring the effectiveness of corrosion inhibition of the liquid includes a high impedance differential amplifier to which two electrodes, adapted to be immersed in the li... | 02/24/1981 |
| 4241370 | Thermal relays particularly for starting single-phase asynchronous motors A motor starting relay particularly adapted for use in starting single phase asynchronous motors comprises a resistor element of positive temperature coefficient of resistivity which is compactly arranged within a housing and engaged by electrical contact... | 12/23/1980 |
| 4238749 | High inrush current circuit breaker An electromagnetic circuit breaker is provided having a flux producing solenoid and a movable armature attractable to the solenoid upon the occurrence of a predetermined current level and duration. A flux path in the form of members of low reluctance are ... | 12/09/1980 |
| 4237510 | Electrical switching apparatus A housing is disclosed in which a positive temperature coefficient (PTC) of resistivity element is mounted a selected distance from but in thermal communication with a thermostatic switch also mounted within the housing.... | 12/02/1980 |
| 4236065 | Self-regulating electric heater A self-regulating electric heater particularly useful for heating compressor lubricant and the like is disclosed in which a cylindrical body of electrically insulative ceramic is formed with an axially extending generally parallelepiped shaped slot in com... | 11/25/1980 |
