"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
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7369639 | Method and tomography unit for taking tomographic pictures of a beating heart A method and a tomography unit are disclosed for taking tomographic pictures of a patient's beating heart, in particular X-ray CT pictures. In such a method and tomography unit, only detector data or image data of a portion of the cardiac phase from one or more hear... | 05/06/2008 |
| 5844456 | Electromagnetic relay An electromagnetic relay is provided with an electromagnet system with a U-shaped core yoke and an essentially flat armature, which form a working air gap on a longitudinal side underneath the coil winding. One yoke limb lies immediately on the coil windi... | 12/01/1998 |
| 5781089 | Electromagnetic relay An electromagnetic relay includes a winding, a magnetic core disposed within the winding, and an armature mounted for movement at a first end of the winding. At least one movable circuit contact is operably associated with the armature and movable with re... | 07/14/1998 |
| 4910484 | Electromagnetic relay having silencing effect A relay comprises a yoke, an armature, a movable contact spring having a movable contact, at least one stationary contact mounted thereon, and a core. An air damper is mounted on a free end of the movable spring, or on a free end of the armature, to reduc... | 03/20/1990 |
| 4553117 | Pneumatic timing attachment for an electromagnetic device A timing attachment for a relay which may be programmed to provide an ON DELAY or an OFF DELAY operation of a pair of switches with each switch having either normally open or normally closed contacts. The attachments includes a bellcrank having a lever ar... | 11/12/1985 |
| 4535310 | Pneumatic timing attachment for an electromagnetic device A timing attachment for a relay that is programmable to provide an ON Delay or an OFF Delay operation of a pair of switches having either normally open or normally closed contacts. The attachment includes a housing that is mountable in either of two posit... | 08/13/1985 |
| 4504807 | High inrush current circuit breaker A magnetic circuit breaker has a U-shaped magnetizable plate between the solenoid coil and the plastic spool flange located below the pole piece that is engaged by the armature to trip the breaker. This U-shaped disc diverts some of the instantaneous flux... | 03/12/1985 |
| 4480158 | Time delay switching device A time-delay switching device which includes a pneumatic timer adapted to be triggered by an electromagnet. The switching device includes at least two switches, with each switch including a movable switching element for controlling switching operations in... | 10/30/1984 |
| 4431030 | Fluid timing element, especially a pneumatic timing element for use in household appliances, such as electric toasters A fluid timing element, comprising a nozzle, a needle being at least partly insertable into the nozzle forming a choke gap therebetween, at least one of the nozzle and the needle being axially tapered, the nozzle and the needle being axially movable relat... | 02/14/1984 |
| 4378541 | Time delay switch In a time delay switch comprising: a delay action means comprising an oil dash pot (9) containing a piston (21) of magnetic-flux-responsive substance disposed in an oil-filled cylinder, a magnetic circuit containing a permanent magnet (18) mechanically linked ... | 03/29/1983 |
| 4315231 | High-speed circuit breaker High-speed breaker for an electric circuit, including a fixed contact, movable contact and a movable holder for the movable contact. An actuating rod is reciprocally movable toward and away from the fixed contact between first and second positions. A head... | 02/09/1982 |
| 4303147 | Adjustment for pneumatic timer An adjustment mechanism for a pneumatic timing device, that operates relay contacts with a time delay, in which a needle valve is aligned longitudinally with a bellows and the needle valve is operated by a rotatable adjustment knob that operates a visual ... | 12/01/1981 |
| 4256021 | Pneumatic timer with eccentrically disposed valve needle A pneumatic timer for a timing relay is regulated by the axial movement of a valve needle through a chamber formed in the body of the timer. The valve needle forms a tapered valve stem along its longitudinal axis and the valve stem is eccentrically dispos... | 03/17/1981 |
| 4179676 | Time delay relay movement An improved movement for a time delay relay cooperates with an electromagnet and a timer to provide either "On Delay" or "Off Delay" operation of the relay contacts. The movement has an elongated operating plunger that is movable in forward and backward s... | 12/18/1979 |
| 4104602 | Pneumatic timer A pneumatic timer is disclosed which includes a base plate, a vertical frame member consisting of a frame perpendicular to the base plate and a horizontal frame. The horizontal frame portion includes a central opening, the vertical frame portion includes ... | 08/01/1978 |
| 4038619 | Pneumatic timer A pneumatic timer translating the external force of an electromagnetic relay or the like into rotational movement of a camshaft to actuate a set of switch contacts. The rotation of the camshaft is retarded in one direction by an adjustable pneumatic one-w... | 07/26/1977 |
| 3944955 | Solenoid switches A solenoid switch, particularly but not exclusively for use in a starter motor supply circuit includes a solenoid coil and at least one fixed contact. An armature is movable relative to the coil in response to energisation of the coil and carries a movabl... | 03/16/1976 |
| 3932826 | Dashpot solenoid A dashpot solenoid is provided having a thin-walled well with a support ring around an accurately sized and shaped slightly reduced mouth portion and an adjustable air metering orifice at the bottom or opposite end. A plunger coated with a polyfluoro hydr... | 01/13/1976 |