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"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 7220047 | Control dial and ejector button for handheld appliance A handheld mixer (10) has a body comprising a housing (12) that houses a motor and drive system and an integral handle (16), and one or more mixer attachments (20). A rotatable dial control (24) is rotatable about an axis (28 | 05/22/2007 |
| 7211758 | Circuit interrupter that produces snap-action connection and disconnection between electrical contacts An apparatus and method to minimize teasing and contact welding at contact points includes a switch having a first contact movable toward a second contact from a switch-deactuated position to a switch-actuated position and movable away from the second contact from t... | 05/01/2007 |
| 7203330 | Switching unit for a microphone A switching unit for a microphone includes a slider-mounting member, a slider mounted slidably on the slider-mounting member and having an operating element, and a slider-positioning mechanism mounted on the slider-mounting member and defining an elongated slot for ... | 04/10/2007 |
| 7161253 | Portable power source A portable power source for starting a variety of outdoor power equipment. The portable power source generally includes a housing, an electrochemical power supply, a switch having an ON position with a fixed contact and a START position with a momentary contact, and... | 01/09/2007 |
| 6872905 | Pushbutton for latching and momentary contact functions The invention relates to a modular selection button for actuating contact elements. Said button comprises a housing (6), spring-loaded switching lugs (81) and according to requirements a control switch (10), a rotary knob (11) or a key-op... | 03/29/2005 |
| 5934455 | Switch device A manually operated switch device with small operating play and precise function for the control of electrical equipment which includes a switch housing which has stationary contacts adapted thereto, and a contact bridging element with moving contacts whi... | 08/10/1999 |
| 5488212 | Switching device for an on-load tap changer Disclosed is a switching device for a tap changer comprising an input lever and an output lever rotatably attached to a shaft. The output lever is provided for making contact with a selected one of a first tap and a second tap. The output lever has a camm... | 01/30/1996 |
| 5380972 | Rocker switch A rocker switch includes at least one switch device (105) actuable by a first side (110) of a first end (106) of a spring (107). The spring (107) has a second end (108) opposing the first end (106). First (103) and opposing second (103') support members a... | 01/10/1995 |
| 5326946 | Electrical switch An electrical switch (1) is proposed which consists of a lower housing component (3) and an upper housing component (2). In receptacles (24) of the lower housing component (3) contact lugs (23', 23") with a normally closed contact (29', 29") are arranged.... | 07/05/1994 |
| 5226528 | Switch operating mechanism A switch actuator includes an operator plate which provides a structure for mounting the actuator and for supporting the remaining parts. An operator shaft receives torque from an operating handle and via mechanical coupling, transmits torque to a torque ... | 07/13/1993 |
| 5067752 | Dry break coupling A low flow resistant dry break fluid coupling suitable for military and industrial refueling applications wherein the coupling is connected to a male adapter by radially displaceable detents operated by an axially movable locking sleeve. The coupling incl... | 11/26/1991 |
| 4927990 | Spring-biased push-button switch having a spring-loaded tactile feedback feature A push-button switch comprises a fixed electrode; a movable electrode disposed opposite to the fixed electrode; a key housing having a tubular spring retainer, and an annular guide wall surrounding the tubular spring retainer and having a stopping flange,... | 05/22/1990 |
| 4916277 | Alternate action mechanism An alternate action mechanism having a housing with first and second transverse walls enclosing a snap-acting switch accessible through a hole in the first wall. An actuator includes a plunger disposed in the hole for operating the switch and a guide stru... | 04/10/1990 |
| 4675481 | Compact electric safety switch A compact electric safety switch including a rotatably mounted double contact assembly. Heavy duty compression springs are positioned under the blade assembly for rapid make and break connection between a pair of contact stabs. The series arrangement betw... | 06/23/1987 |
| 4574170 | Multi-polar circuit breaker By articulating the neutral-pole switching element in a multi-pole circuit breaker, providing spring biasing to urge the two elements into a pre-determined position approximating alignment, advancing the neutral pole switching element with respect to the ... | 03/04/1986 |
| 4233479 | Switch A step control switch for variable speed electric motors and the like is provided in which several spring forces are utilized in various combinations in order to reduce the velocity of the thrust force of the control button in either increasing or decreas... | 11/11/1980 |
| 4149052 | Safety-disconnect power tool switch An electric power tool mounted switch that provides safety-disconnect under contact-weld conditions, and is of the manual close, manual open, or momentary (spring return), double-pole type having an actuator of the toggle lever, trigger or other suitable ... | 04/10/1979 |
