Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 6965292 | Isolation cap and bushing for circuit breaker rotor assembly An electrically isolated rotor assembly for a cassette assembly of a circuit breaker includes a rotor having a first side and an opposing second side, a first isolation cap disposed on the first side, a second isolation cap disposed on the second side. Each isolatio... | 11/15/2005 |
| 6160470 | Circuit breaker A circuit breaker includes an upper rail mounting device defined by a line terminal having a pair of spaced-apart jaws. A bimetal is adjusted by means of a calibration screw. An aperture is provided in an upper sidewall portion of a base of the circuit br... | 12/12/2000 |
| 6104273 | Calibration assembly and process for use in a circuit protective device In an exemplary embodiment of the invention, a calibration arrangement and process for use in a circuit protective device are presented. An exemplary calibration assembly for use in the calibration process of the present invention includes a split clamp a... | 08/15/2000 |
| 5844466 | Bimetallic thermal triggering apparatus for a protection device Thermal triggering apparatus, for a protection device featuring an electrically conductive bimetallic strip and a plate of thickness (e) which supports the bimetallic strip. The bimetallic strip has a first end free that is capable of deforming and a seco... | 12/01/1998 |
| 4908594 | Thermal overload relay A thermal overload relay comprising a change-over spring mechanism and a contact mechanism that is separated from the spring mechanism. The contact mechanism is actuated by the spring mechanism, which is driven by a bimetallic strip when an overcurrent fl... | 03/13/1990 |
| 4882556 | Multi-pole circuit interrupter A multi-pole circuit interrupter comprising an electrically insulating housing having two side walls and at least two partition walls defining therebetween a central compartment and at least two side compartments. A central pole unit is disposed within th... | 11/21/1989 |
| 4845460 | Multipole low-voltage circuit breaker with an insulating material housing and arc-quenching chambers A multipole low-voltage circuit breaker with an insulating material housing and arc quenching chambers. By a new mechanical design, the installation of the arc quenching devices is to be facilitated. All arc quenching chambers of a switchgear are arranged... | 07/04/1989 |
| 4808961 | Thermally-sensible overcurrent protective relay including contact toggle mechanism In an overcurrent protective relay thermally operable by a bimetal, a movable contact mechanism is employed by utilizing a snap inversion mechanism. A normally-closed contact is employed with having an overtravel to achieve the reliable contacting. A manu... | 02/28/1989 |
| 4788518 | Thermally-sensitive overcurrent protective relay including wire connection terminal A thermally-sensitive overcurrent protective relay includes a housing case, a bimetal strip bendable in response to an operating current flowing through a control circuit of the overcurrent protective relay, and a movable contact biased by a spring to for... | 11/29/1988 |
| 4785274 | Thermally-sensible overcurrent protective relay including automatic resetting mechanism A thermally-sensible overcurrent protective relay comprising a toggle mechanism operable in connection with the bending operation of a bimetal bendable in response to current flowing through a main circuit a normally-open contact having a normally-open fi... | 11/15/1988 |
| 4745389 | Protection switch with thermal excess-current release A protection switch, or a circuit breaker, includes a bimetallic element provided with a heating winding to form a portion of a structural unit insertable into an upper housing part, said structural unit further including a carrier connected to the bimeta... | 05/17/1988 |
| 4724411 | Circuit breaker A circuit breaker has a metal frame (10) disposed on a base of a housing. A trip-bar (6) made of molded plastic of like material is rotatably held on the frame (10) by insertion of a trip-bar pin (15) into a center through-hole provided on the trip-bar, a... | 02/09/1988 |
| 4652847 | Thermal-type overload relay In the thermal-type overload relay such a construction that a bimetallic strip deforms due to heat produced by an excessive amount of current to actuate a normally closed movable contact which constitutes a normally closed contact, and an operating rod is... | 03/24/1987 |
