| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 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 |
| 4027587 |
Pulley construction for high speed printer belt |
June 7, 1977 |
| Chain or belt printers for high speed print-out from computers and the like employ metal or plastic type slugs clipped to a toothed elastomeric timing belt. The belt passes around two toothed pulleys one of which drives the belt so that the type slugs pass along a printing line at a pred |
| 3978384 |
Bidirectional motor drive using switched amplitude controlled current |
August 31, 1976 |
| In the computer field tape handlers for magnetic tape are widely used. The magnetic tape is moved by a capstan driven by a high power low inertia motor since it is necessary to rapidly accelerate and decelerate the tape in both forward and reverse directions. A high power motor is provid |
| 3951090 |
Hydraulic system for raising and lowering keel |
April 20, 1976 |
| The hydraulic system for raising and lowering a heavy keel comprises a cylinder, a piston movable in the cylinder and connected to the keel, and an accumulator for supplying hydraulic fluid at a positive pressure below that necessary to raise the keel against the piston in a direction fo |
