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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7355139 | Miniature circuit breaker A miniature circuit breaker includes an elastic contact piece to contact with two terminals of a circuit, thereby electrically connecting the circuit. One end of the elastic contact piece fixed to a terminal is a fixed end, and the other end of the elastic contact p... | 04/08/2008 |
| 6992559 | Overload protection switch An overload protection switch has a conductor interconnecting the first primary leg and a second primary leg so that when current passes through the switch, the current not only raises the temperature of the bi-metal plate, but also raises the temperature of the con... | 01/31/2006 |
| 6621403 | Overload tripping device for circuit breaker An overload tripping device includes a temperature-compensating bimetal operating as a tripping lever and interposed between an output lever of a differential shifter mechanism linked with a main bimetal and a latch receiver of an opening-and-closing mech... | 09/16/2003 |
| 6512441 | Push-button switch of overload protection (II) A push-button switch with overload protection is disclosed. The switch comprises a housing, a conducting unit, and an actuating unit. The conducting unit comprises several terminals, a normal-open first conducting leaf and a thermally deflecting bimetal s... | 01/28/2003 |
| 6445273 | Overload-protection push-button switch with automatic resetting mechanism An overload-protection push-button switch with automatic resetting mechanism is disclosed. The switch is characterized in that a pressing stem actuates a conducting leaf via an enabled rocking lever, and that a wrecking bar is provided to dislocate the po... | 09/03/2002 |
| 6377159 | Push button circuit breaker switch A circuit breaker switch essentially comprising a push button switch, an alloy metal having one end connected to a contact of a circuit of the switch and the other end being mounted to the circuit of the switch. If the current to the switch does not excee... | 04/23/2002 |
| 6377158 | Push button current cut-off safety switch A push button current cut-off safety switch comprising a housing having an opening; a push button mounted within the housing and being fitted to said opening; a push rod being mounted below said push button and including a triangular passage and an insula... | 04/23/2002 |
| 6353380 | Power switch device A power switch device includes a switch body with a switch contact device pivotally connected to a switch cover body. An alloy piece is connected to one of two contact terminals and a second contact joint to which the other contact terminal disengagably c... | 03/05/2002 |
| 6335674 | Circuit breaker with a push button A circuit breaker with a push button includes an electrical breaker having a casing having an opening defined therein with a hole defined in each side near the opening. A first prong and a second prong each attached to and extending through the casing. An... | 01/01/2002 |
| 6307459 | Power switch device A switch structure comprises a control element, which comprises an alloy piece and a swing contact device. The alloy piece includes an actuating piece with a convex part, which has a upper side normally pushing the lower surface of the end part in the swi... | 10/23/2001 |
| 6307460 | Power switch device A power switch device includes a switch box with a button pivotally connected thereto which is pivotally connected to an actuating member. An engaging member is movably connected to the actuating member and removably engaged with a block. A head connected... | 10/23/2001 |
| 6275133 | Switch structure A switch structure comprises a control element, which comprises an alloy piece and a swinging device. The swinging device has an actuating element used to actuate the swinging device when the actuating element is pushed. When the alloy piece is overheated... | 08/14/2001 |
| 6252489 | Switch structure A switch structure which includes an alloy piece, a contact control device, and a push device is disclosed. The contact control device includes an elastic part and connects to an end part so that the end part may reciprocally move with respect to the cont... | 06/26/2001 |
| 6249209 | Switch structure having a current overloading protection mechanism A switch structure comprises a switch case, a switch, a contact reed, a control element, a swinging device, and an alloy piece. The swinging device is assembled with the control element. The switch is coupled with the contact reed. When the alloy piece is... | 06/19/2001 |
| 6154116 | Thermal circuit breaker switch The thermal circuit breaker and switch has fixed and movable contacts, and non-conductive contact and trip actuators. The movable contact is provided on the free end of a lever arm that normally biases the movable contact toward its open position. The con... | 11/28/2000 |
| 6121868 | Electric switch device which can prevent damage to it and devices connected to it The present invention provides an electric device comprising two electric terminals, a button mechanism having a push button that can depressed to toggle between "on" and "off" statuses, and a conductive reed that conducts electric current between the two... | 09/19/2000 |
| 6094126 | Thermal circuit breaker switch The thermal circuit breaker and switch has fixed and movable contacts, and non-conductive contact and trip actuators. The movable contact is provided on the free end of a lever arm that normally biases the movable contact toward its open position. The con... | 07/25/2000 |
| 6072381 | Small-sized simple switch for protecting circuit A small-sized simple switch for circuit protection of the present invention is simple in structure and easy to operate, and can be readily switched for safety protection of circuits. An alloy plate of the present invention is highly resilient. When in ove... | 06/06/2000 |
| 5828284 | Circuit overload protective device A circuit overload protective device includes a body having a button pivotally disposed thereto and a bimetallic strip disposed thereto which has a first contact point disengagably contacting a second contact point on the body. A first member and a second... | 10/27/1998 |
| 4339740 | Thermally responsive switches A thermally responsive electric switch including two dimensionally identical, bimetallic, snap-over, part-spherical, thermally responsive actuating elements 9, 11, arranged in a nesting, contacting relationship within the end portion 7 of a housing. The f... | 07/13/1982 |
