Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 6211590 | Spring-applied pad and carrier brake A braking system has a shaft which rotates with a wheel on a vehicle. A rotor rotates with the shaft within a housing. The housing also contains an electromagnetic coil and two armatures. The rearward armature is in contact with the coil while the forward... | 04/03/2001 |
| 5964313 | Motion control system for materials handling vehicle The present invention is directed to an improved motion control system for a motorized hand/rider lift truck having a load bearing fork, electric traction motor, storage battery, steerable wheel, steering control mechanism, and a brake that includes a dea... | 10/12/1999 |
| 5340202 | Service braking technique for material handling vehicles The present invention features an improved technique for slowing and stopping a vehicle having an electric service motor, a mechanical parking brake, and a deadman's switch for engaging the mechanical brake. The method of the invention improves the effici... | 08/23/1994 |
| 5275255 | Integrated controls and seating configuration for reach-fork vehicles The present invention features an integrated control and seating system for a material handling vehicle. The system includes a pair of control handles integrated into the control arms within an operator's compartment. Additionally, the operator seat can b... | 01/04/1994 |
| 5265021 | Motor vehicle steering system having reversible direction control The present invention features an automatically reversible steering system for a material handling vehicle. The system has a steering mechanism connected to the vehicular drive motor of the vehicle that controls the steer motor turning direction. When the... | 11/23/1993 |
| 5181173 | Variable ratio steering system for a motor vehicle The invention features an electronic feedback circuit for varying the steering ratio of a motorized material handling vehicle in response to the vehicular speed. The lock-to-lock turn of the steering wheel or column is electronically adjusted in order to ... | 01/19/1993 |
| 5179290 | System of maintaining clean electrical contacts A method is described for maintaining silver cadmium oxide alloy tips of an electrical contactor clean and substantially free of contamination involving operating the electrical contactor normally, under its regular working operation, in a cold switching ... | 01/12/1993 |
| 5128598 | Material handling vehicle steering system A unique steer/drive control system is featured for steering a material handling vehicle by the use of directly coupled traction and steering motors. The steering motor is fabricated as a hollow shaft dc motor, whose inner ring represents the rotor, and w... | 07/07/1992 |
| 5123081 | Temperature control system for motors and power components of a material handling vehicle The present invention features a system and method for preventing overheating of a motor and/or power amplifier of a material handling vehicle by controlling the performance of the vehicle as a function of motor and/or power amplifier temperature. Tempera... | 06/16/1992 |
| 5113344 | Material handling vehicle identification tag The present invention features a material handling vehicle identification system. The material handling vehicle has a universal system processor for controlling the vehicle speed, acceleration, direction and motion of a plurality of different vehicles. A ... | 05/12/1992 |
| 5039924 | Traction motor optimizing system for forklift vehicles A system for optimizing control of separately excited shunt-wound dc motors, where optimization is achieved through microprocessor-based independent PWM control of a chopper (armature) and an H-bridge (field). Connected to the armature is an armature volt... | 08/13/1991 |
