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"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
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| Number | Title | Issue Date |
| 7324876 | System for remotely controlling energy distribution at local sites A power management system and associated method includes provision of local wireless energy control units at remote sites for controlling power delivery to customer loads, and a central station with a wireless transmitter for broadcasting commands to the wireless en... | 01/29/2008 |
| 7317375 | Adjustable safety switch A switch device includes a body with a switch member pivotably engaged with a top opening of the body and a first terminal and a second terminal respectively extend through two slots in a bottom of the body. A connection member is fixedly connected to an inside of t... | 01/08/2008 |
| 7312687 | Protective switch for protecting a circuit A protective switch for protecting a circuit includes an operating element or rocker switch, contact connections projecting from a housing, a contact spring electrically connected to a first contact connection and having a free end covering a second contact connecti... | 12/25/2007 |
| 7304560 | Safety switches A safety switch includes a switch member and a push rod is pivotably connected to an inside of the switch member. A biasing member pushes the push rod toward a stop rod extending from the inside of the switch member. A bi-metallic contact plate has a first end fixed... | 12/04/2007 |
| 7283031 | Circuit breaker A breaker has a first conducting strip and a second conducting strip respectively mounted on a lower end of a shell; a first terminal mounted on the second conducting strip; a bimetal strip securely provided on a first conducting strip; a second terminal mounted on ... | 10/16/2007 |
| 7265652 | Controllable electronic switch A controllable electronic switch for, e.g., controlling power distribution comprises a deformable member such as a bimetal arm that can be deformed to break an electrical path. The deformable member may be anchored at one end and in controllable contact with an elec... | 09/04/2007 |
| 7253375 | Components of thermostatic units and laser welding method for producing the components A method for joining components of thermostatic systems and thermal relays for low-voltage circuit breakers, the components being constituted by at least one bimetallic element constituted by a lamina with a first face and a second face and at least one connection e... | 08/07/2007 |
| 7248140 | Adjustable safety switch A switch device includes a body with switch pivotably connected to a top thereof and two terminals extend through an underside of the body. A first contact point is connected to one of the terminals and a bi-metallic plate has a first end fixed to the other terminal... | 07/24/2007 |
| 7236082 | Circuit breaker structure An improved structure of a circuit breaker is provided which comprises a housing, a rocker-switch, a push-shaft, a pull-shaft, a bimetallic strip, and other parts. There are three terminals under the rocker-switch inside the housing. A bimetallic strip embedded in a... | 06/26/2007 |
| 7205871 | Circuit breaker intermediate latch An intermediate latch for a telecommunication system circuit breaker trip device is provided. The trip device has a spring biased trip bar with a latch extension. The circuit breaker has an operating mechanism with a spring biased cradle. The intermediate latch has ... | 04/17/2007 |
| 7154361 | Accessories for a rotatable latching shaft of a circuit breaker An accessory for providing mechanical communication between a rotatable latching shaft and an actuation device of an electrical circuit breaker includes a lever, a working surface, and a snap fitting. The lever includes an engagement orifice. The engagement orifice ... | 12/26/2006 |
| 7030726 | Protection mechanism for switches A protection mechanism for a switch device includes a pull member that has one end pivotably connected to the switch member and the other end which is a hook end for lifting the bimetallic plate to set the switch device to “OFF” status. A push member is pivotabl... | 04/18/2006 |
| 6940374 | Overload/open-phase tripping device for circuit breaker An overload/open-phase tripping device for a circuit breaker includes a plurality of bimetallic elements arranged in a row; a differential shifter mechanism; and a tripping lever for transmitting a force applied by the differential shifter mechanism to a switching m... | 09/06/2005 |
| 6445274 | Circuit interrupter with thermal trip adjustability A circuit interrupter including a housing, separable main contacts within the housing, and an operating mechanism within the housing and interconnected with the separable main contacts. A trip mechanism is disposed within the housing that includes a trip ... | 09/03/2002 |
| 6014803 | Thermal triggering system A thermal triggering system includes bimetal strips a switching element for triggering a switching operation, and a differential lever which is fastened to the slide and which shortens its distance from the switching element as a result of the movement of... | 01/18/2000 |
| 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 |
| 5825273 | Differential thermal tripping device with bimetallic strips Differential thermal tripping device with bimetallic strips for electrical protection appliance such as a circuit breaker. The circuit breaker includes a tripping assembly with two contact strips 30, 40 free to move along the X direction, and for each bim... | 10/20/1998 |
| 5767762 | Overcurrent relay having a bimetal a resetting member and an accelerating mechanism An accelerating mechanism in an overcurrent relay for accelerating the speed of moving operation of a resetting bar or the speed of motion in a normally closed contact caused by the resetting bar. In the application of the relay to any resetting mechanism... | 06/16/1998 |
| 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 |
| 4891621 | Ambient compensator for thermal overload relay A one piece member rests against a cam surface at a first end and against an adjustable pivot at a second end, biased thereagainst by an integral cantilever spring of said member, the distal end of which is interlocked in a deflected position to a hook fo... | 01/02/1990 |
| 4859979 | Thermal relay A thermal relay is provided comprising, in a first cavity of a case, bi-metallic strips through which pass currents of a multi-phase network feeding a load through an electromagnetic contactor and, in a second cavity, an electromagnetic sub-assembly inclu... | 08/22/1989 |
| 4845455 | Thermally-sensible overcurrent protective relay including heater holder Disclosed herewith is a thermally-sensible overcurrent protective relay, which comprises normally-closed contact means, operation means, a plurality of bimetals, a communicating plate, a heater mounted on each bimetal and electrically coupled to at least ... | 07/04/1989 |
| 4814737 | Overload relay The invention relates to an overload relay with input and output leads provided on opposite side surfaces of the housing as well as auxiliary switch terminals associated with the front side. The break contact terminal (17, 18) are provided here at the sam... | 03/21/1989 |
| 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 |
| 4806897 | Overload relay having adaptive differential mechanism In a plural phase overload relay, a pivot lever (12) is mounted to the ambient compensator deflector (9), and a second pivot lever (34) is mounted to both driver and follower slide bars (36 and 38) and driven thereby to engage and pivot the first lever on... | 02/21/1989 |
| 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 |
| 4698606 | Circuit breaker with adjustable thermal trip unit A circuit interrupter responsive to abnormal currents in conductors of an electrical distribution system characterized by a circuit breaker mechanism for opening and closing separable contacts and which mechanism comprises a releasable member operable bet... | 10/06/1987 |
| 4691184 | Bimetal releaser A method for calibrating a bimetal releaser for a switch, e.g. a motor protection switch, the releaser including a release bridge and a differential bridge which is movable relative to the release bridge, with the ends of the bimetal strips being disposed... | 09/01/1987 |
| 4670728 | Thermal type overload relay A thermal-type overload relay which uses a bimetallic element for sensing overload currents includes a shifter controlled by the bimetallic element to shift a release lever to which is attached a spring. The spring controls a movable board which has two r... | 06/02/1987 |
| 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 |
| 4638732 | Sheet handling apparatus Sheet handling apparatus is provided which includes structure for feeding a sheet in a predetermined path of travel, for sensing the sheet in the path of travel and providing at least one sensing signal indicative thereof, for printing postage indicia on ... | 01/27/1987 |
| 4635020 | Thermal-type over load relay A thermal-type over load relay having an improved contact operating mechanism whereby testing of the operation of the relay is made easy, malfunctions due to mechanical shock or the like are substantially eliminated, and the overall size of the relay is r... | 01/06/1987 |
| 4528539 | Reduced-size thermal overload relay A reduced-size thermal overload relay having a housing (2) that includes three narrow compartments (2k, 2l, 2m) in which are mounted three connector brackets (16,18,20) supporting three flat bimetal members (16j, 18j, 20j). Three narrow cassette heaters (... | 07/09/1985 |
| 4475098 | Method of manufacturing a multi-phase thermal circuit breaker and multi-phase thermal circuit breaker produced thereby Each bimetallic element is associated with one phase and is attached with one end thereof to a metallic support mounted at a wall of a housing. Each support comprises two supporting surfaces or faces lying in a plane which extends at right angles to the b... | 10/02/1984 |
| 4096465 | Electrical overload switching relay An overload switching relay for a multi-phase electricity supply responds to the value of the currents in the individual phases and actuates a contact-breaking switch in the event of either (i) the mean value of the currents on all phases exceeding a firs... | 06/20/1978 |
| 4034327 | Timing pulse generating switch The invention relates to a timing pulse generating switch assembly, particularly for the monitoring circuit of an oil or gas furnace, having at least one snap switch provided with a contact arm which carries the movable contact. The movable contact arm is... | 07/05/1977 |
| 3932829 | Excess current switch This invention relates to an excess current switch. Such a switch includes a housing, a contact bridge, a bimetal strip for providing a thermal trip, switch actuating means and a slide bar. These components are arranged in a simple and space saving manner... | 01/13/1976 |
