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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7313982 | Multiple output transmission A transmission for driving one or more powered devices from a single drive motor. The transmission includes at least one output drive shaft, and at least one gear. Each gear is in constant driving engagement with at least one other gear, and one gear is engaged with... | 01/01/2008 |
| 7055283 | Control system for door opener A control system for switching an electric operation to a manual operation of a door opener comprises: a housing 11, including a power unit 12 driving a shaft 120 electrically and transmitting the power to an output shaft 16; a braking de... | 06/06/2006 |
| 6962093 | Noise reduction structure for power take-off unit gear assembly A noise reduction structure is provided for use with a meshing gear assembly, such as in a power take-off unit for selectively providing power to one or more rotatably driven accessories. The meshing gear assembly includes meshing input and output gears that are sup... | 11/08/2005 |
| 6951269 | Device for guiding a driving torque A device for guiding torque of one drive shaft (3) connected with a driving appliance (2) onto a first or a second output shaft (4, 5). A torque fed via the drive shaft (3) can be applied, respectively, to one of the two output shafts ( | 10/04/2005 |
| 6935478 | Fluid friction clutch A fluid friction clutch, in particular for a motor vehicle fan, having a rotatably mounted shaft wherein a reservoir for at least largely holding the fluid is provided radially inside an outer periphery of the drive body, and wherein at least one first flow path and... | 08/30/2005 |
| 6904740 | Articulating handle for a walk-behind mower A walk-behind greensmower includes an operator presence control for selectively determining when power from a source is delivered to an output. The operator presence control includes a handle, a bale coupled to the handle, a control arm and an electromagnet. The bal... | 06/14/2005 |
| 6811001 | Electromagnetic brake An electromagnetic brake, interposed between a stationary housing and a rotational member, includes a multi-plate brake mechanism, a ring-like core member fixed within the housing, an exciting coil accommodated in a groove in the core member, and a ring-like armatur... | 11/02/2004 |
| 6200426 | Paper machine with a controllable electro-magnetic clutch A paper-making machine or an off-line coater includes a rotatable drive unit and a rotatable driven element in the form of a roll, cylinder, pulley and/or gear. A clutch includes a rotatable input shaft coupled with the rotatable drive unit. At least one ... | 03/13/2001 |
| 6199322 | Method and apparatus for automatically driving an open/close body At the time of changing over an open/close body from a manual operation to an automatic operation, a reliable clutch connection is established in a power transmission system between a drive source and the open/close body thus enhancing the operability of ... | 03/13/2001 |
| 6099430 | Clutching actuator for clutch control system in a drive line apparatus A clutched actuator for use in a transfer case is disclosed which may be used in conjunction with electronic traction control systems and anti-lock braking systems where the clutched actuator system is required to quickly disengage the four-wheel drive of... | 08/08/2000 |
| 5971121 | Mag stop clutch with center pole An improved brake/clutch unit for use in a riding lawnmower or another vehicle is provided. The unit includes a rotor assembly disposed radially outwardly of a longitudinally extending input shaft, an armature assembly, and a field shell assembly. The rot... | 10/26/1999 |
| 5952750 | Electromagnetic spring clutch with non-magnetic rotating members A compact, inexpensive electromagnetic spring clutch includes forming supporting bearing surfaces made of synthetic resin rotary members, in a magnetic excitor. Cylindrical magnetic pole parts are formed in the first core and second core and the inner sur... | 09/14/1999 |
| 5620077 | Fail-safe brake actuation system The actuator uses an electric motor to drive a recirculating ball screw thread connection, to hold a brake-actuation spring at bay. After the spring has been compressed to the brakes-off position, the electric motor is de-energized. Then, the screw-thread... | 04/15/1997 |
| 5573091 | Electrically powered or manually driven clutch and brake assembly for electric winch Electrically powered or manually driven clutch and brake mechanism for an electric wince cooperate with a transmission mechanism. The clutch mechanism is provided with a thrust bearing on a clutch shaft and a large clutch gear is then inserted thereon. A ... | 11/12/1996 |
| 5441131 | Asymmetry/overspeed brake unit An asymmetry/overspeed brake unit designed to stop the rotation of a control surface and its attending drive set and attachment hardware in response to a mechanical overspeed condition or an electrical signal from a flight control computer. The asymmetry/... | 08/15/1995 |
| 5119918 | Electromagnetic clutch with permanent magnet brake Energization of an electric coil produces flux for attracting an armature of a clutch into engagement with a rotor in order to couple an input shaft to an output pulley. When the coil is de-energized, two angularly spaced permanent magnets pull the armatu... | 06/09/1992 |
| 5050711 | Electromagnetic brake apparatus A stationary brake member (45) which is used in an electromagnetic brake apparatus, comprises a first press-worked plate (45h) and a second press-worked plate (45m) which are laminated to each other. The second press-worked plate (45m) has plural hooks (4... | 09/24/1991 |
| 5024638 | Actuator for a frictional engaging device An actuator for frictional engaging devices is controlled by electric signals from a control device and is disposed in a power transmission device. The actuator includes a torque generating mechanism and has at least two movably mounted frictional engagin... | 06/18/1991 |
| 4974711 | Brake and clutch control A clutch and brake control circuit includes first and second relays connected to an interlock circuit and to the brake and clutch coils on a vehicle. The relays are interconnected with the coils so that the clutch coil cannot be energized unless the brake... | 12/04/1990 |
| 4964503 | Manipulator using a single motor driving plural flexible shafts A manipulator features the use of a single motor and a plurality of flexible cables which are interconnected with the motor via a plurality of clutches which can be selectively engaged and disengaged. The cables transmit rotational energy to elements of t... | 10/23/1990 |
| 4878568 | Electromagnetic clutch/brake assembly Aligned shafts are coupled by a clutch and brake assembly that includes a single electromagnetic coil and single return spring. The braking torque is reacted through the field structure frame for the coil and an annular rotor acts as a pole piece to shift... | 11/07/1989 |
| 4870875 | Driving device for auxiliary device A driving device for an auxiliary device of an engine, comprises a carrier to be rotated by a crankshaft of the engine, a plurality of planet gears supported by shafts formed on the carrier, an internal gear meshed with the planet gears and supported rota... | 10/03/1989 |
| 4844223 | Arrangement for braking a gearbox component A change speed gearbox for a combine or the like has a main clutch on its input shaft and a shift collar shiftable into alternate positions from a neutral position to establish different driving ratios in the gearbox. An electro-magnetic brake is engageab... | 07/04/1989 |
| 4825988 | Electromagnetically controlled spring clutch mechanism An electromagnetically controlled spring clutch mechanism for transmitting the rotating forces of an input rotating element adapted to rotate in a predetermined direction and in a direction opposite thereto to an output rotating element. According to one ... | 05/02/1989 |
| 4807727 | Method and apparatus for securing a torque applying device Method and apparatus for securing an electric brake/clutch (14) against rotation relative to a stationary member (10). A preferred system includes an anti-rotation lever (26) attached to and extending from a brake/clutch housing (16). Anti-rotation lever ... | 02/28/1989 |
| 4734604 | Friction braking system and apparatus for appliance induction motor drive A friction braking system located entirely inside an induction motor of an appliance quickly stops rotation of the rotor in the appliance motor, for example such as a food processor, whenever the A.C. electrical power is turned off. Thus, rotation of any ... | 03/29/1988 |
| 4676859 | Labeling apparatus Apparatus for applying pressure sensitive labels to products on a product line peels the labels from a web of release paper and applies them to the products, when the latter are detected to be in a predetermined position, by action of a pneumatic applicat... | 06/30/1987 |
| 4669295 | Method of manufacturing a magnetic rotatable member for an electromagnetic clutch An electromagnetic clutch includes a first rotatable member of magnetic material having an axial end surface and a hollow portion in which an annular electromagnetic device is disposed in a stationary position. A second rotatable member, such as a drive s... | 06/02/1987 |
| 4570767 | Electromagnetic clutch/brake device The disclosure describes an electromagnetic clutch/brake device which prevents undesired vibration of a rotary brake mounted on an ouput shaft so as to be slidable in its axial direction. For this purpose, the rotary brake is made unbalanced in weight in ... | 02/18/1986 |
| 4567972 | Clutch wear detector, adjustment and indicator system A clutch system providing a simplified clutch adjustment which also gives an indication of how much clutch facing remains so that it is known when a clutch face needs replacement. The system mounts the motor armature and flywheel in a bearing structure wh... | 02/04/1986 |
| 4556199 | Electric winch apparatus A drum winch apparatus having an alternating current motor and direct current operable clutch and brake coils together with a control circuit for energizing these member is disclosed. The control circuit includes alternating current switching of DC curren... | 12/03/1985 |
| 4553569 | Control method of stopping a loom at a predetermined position thereof A method of stopping a loom, whose operation is controlled by a microcomputer, at a predetermined position thereof is disclosed herein. In view of the phenomenon that the load on loom operation is varied with the operating cycles thereof depending on the ... | 11/19/1985 |
| 4538717 | Control apparatus for a step drive The invention relates to a step drive assembly which includes a rotatable operating unit for operating a tool or knife or the like. The assembly has a change-over clutch for selectively connecting the operating unit to a continuously running motor or a br... | 09/03/1985 |
| 4494203 | Method for correcting the deviation of a predetermined stop position in a loom A method positioning control is disclosed, to stop mechanisms of a loom at predetermined positions when stopping the loom operation, in which the loom is directly controlled by a microcomputer. In the method, correction is made with respect to a predeterm... | 01/15/1985 |
| 4484495 | Differential drive mechanism A differential drive mechanism (10) includes a driving member (12) and a driven member (16). A planetary gearset (64) drivingly connects the driving member (12) and driven member (16) to drive the driven member (16) at a speed lower than that of the drive... | 11/27/1984 |
| 4453774 | Driving arrangement for longwall mining machines The invention is particularly adapted for use with a longwall mining machine of the type having a rack extending along a track for the mining machine, a gear wheel on the machine engageable with the rack for moving the machine along a track, at least two ... | 06/12/1984 |
| 4440277 | Implement clutch and brake control An implement clutch and brake control for portable, engine-operated movable implement tools is described. The implement tool is controlled by a brake and clutch assembly operably connected between the implement tool and an implement engine. The assembly i... | 04/03/1984 |
| 4387794 | Single-surface electromagnetically operated clutch/brake unit An electromagnetic single-surface clutch/brake combination, especially for textile machinery, in which a rotor assembly is locked to the shaft end encloses the magnetic body carrying the coils so that the latter can be secured to the housing flange when t... | 06/14/1983 |
| 4300082 | Speed-regulated positioning drive The drive shaft of a motor can be coupled to an output shaft by an electromagnetically activated friction clutch. The output shaft can be braked by an electromagnetically activated friction brake. The motor drive shaft rotates at constant speed. The rotar... | 11/10/1981 |
| 4298107 | Brake system for a textile machine The braking system for the textile machine is provided with a multiplicity of brake elements which are individually controlled via a common control means. Each brake has a different braking characteristic from the other so that the machine components or a... | 11/03/1981 |
