| Patent Number |
Title Of Patent |
Date Issued |
| 6201321 |
Apparatus and method for dissipating heat from a motor |
March 13, 2001 |
| Heat-conductive masses of material encapsulate end turns of a stator fixed in a housing of a motor to dissipate heat from the stator through the side and one end of the housing. In one embodiment, a resilient heat-conductive pad is interposed between a front plate of the housing and a si |
| 6075306 |
Laminated rotor for permanent magnet brushless motors |
June 13, 2000 |
| A rotor is comprised of laminations forced on a shaft that has two staking rails, which penetrate the laminations and create two holding points. The two staking rails are positioned on the shaft at an angle to force the lamination toward the center of the shaft and force it hard against |
| 6005310 |
Brushless linear motor slider |
December 21, 1999 |
| A brushless, linear motor is provided in which the armature coils are cast in a resin to form an armature plate. A heat sink is attached along one edge of the plate with conductive pins (e.g. aluminum pins) extending through the plate and into the heat sink. Fans, attached to the heat si |
| 5959384 |
Brushless motor housing assembly |
September 28, 1999 |
| A motor, encoder/resolver, and/or dynamic brake assembly in which the dynamic brake, when part of the assembly, is mounted on a rear cover plate of a modular housing for the auxiliary components. When a resolver or encoder is part of the assembly, the motor shaft extends only a short |
| 5920164 |
Brushless linear motor |
July 6, 1999 |
| The armature coils of a brushless linear motor are cast in resin to form an armature plate. A heat sink is attached along one edge of the plate with conductive pins (e.g. aluminum pins) extending through the plate and into the heat sink. Fans, attached to the heat sink, draw air across i |
| 5773941 |
Two-wire brushless DC motor control system |
June 30, 1998 |
| A two wire, brushless, d.c. motor power control system employs a rechargeable d.c. power source (e.g. a battery or a capacitor) to provide power to the commutation position sensing electronics, and commutation logic during dynamic braking and also if desired, during motor start-up af |
| 5317245 |
Brushless DC motor control network |
May 31, 1994 |
| A power control and commutation network for a brushless DC motor includes a first section proximate the motor and a second section remote from and connected to the first section by a pair of conductors. Included in the first section is a servo control amplifier defining a main motor powe |
| 5062384 |
Vacuum chuck rotary seal |
November 5, 1991 |
| A vacuum chuck apparatus includes a vacuum chuck mounted on one end of a hollow shaft whose other end is connected through a rotary seal to a vacuum source. The seal includes a first member having a cap portion cemented to the shaft end and an axially bored frustoconical projection on |
| 4828406 |
Portable ticket issuing device |
May 9, 1989 |
| A portable device for storing information as well as printing and dispensing multiple part tickets, such as traffic or parking violations tickets, includes a manually operable arrangement, for selecting and feeding a ticket from a stacked source of ticket stock, thus significantly re |
| 4264936 |
Altitude correcting vacuum system |
April 28, 1981 |
| A blower motor providing vacuum as, for example, for a magnetic tape handler, is programmed to provide a constant vacuum in an environment of changing altitudes. The blower motor is controlled by a pressure transducer which speeds up the motor as the altitude is increased and slows d |
| 4245917 |
Linear actuator driven printer |
January 20, 1981 |
| A high-speed printer includes a standard printing element, such as a daisy wheel, a paper feed mechanism and a ribbon feed mechanism. All of these various devices are controlled by a single linear actuator which comprises an elongated cylindrical magnet, C-shaped in cross-section, throug |
| 4232353 |
Door lock security system |
November 4, 1980 |
| A door lock security system is disclosed in which each lock in a multiple lock system is modified by the addition of door lock security apparatus which, in electrical form, stores at least an individual key combination (and possibly several different levels of master key combinations) fo |
| 4216889 |
Vacuum tank for magnetic tape handlers |
August 12, 1980 |
| A one piece extrusion provides the base for a simple and effective vacuum tank for magnetic tape handlers. The extrusion carries longitudinal slots which accept stamped metal nuts. These nuts are readily positioned by sliding them along the slots. Slots along the edges of the extrusion a |
| 4187997 |
Vacuum control system for magnetic tape handler |
February 12, 1980 |
| The vacuum for controlling tape loop tension in a magnetic tape handler is supplied by a low speed multiple stage vacuum blower and controlled by a low power solenoid and a flapper valve operated between two predetermined positions. In order to provide fast operation of the flapper valve |
