Solenoid

About: Solenoid is a research topic. Over the lifetime, 19278 publications have been published within this topic receiving 114721 citations.

Vacuum-arc plasma apparatus

Abstract: The apparatus comprises a consumable cathode (1) having a working end face (3), a solenoid (4) coaxially disposed relative to the consumable cathode (1) and having a tubular anode (5) received therein, an igniting electrode (6). Solenoid (4) encircles the tubular anode (5) and the consumable cathode (1), the number of turns per unit length of the solenoid (4) around the consumable cathode (1) being greater than the number of turns per unit length in the remaining portion of the solenoid (4). Moreover, the solenoid (4) extends beyond the igniting electrode (6) at the side opposite to the working end face (3) by a length exceeding half the length of the portion of the solenoid (4) disposed around the consumable cathode (1).

Hydraulically driven, multiple rotor riding trowel

Abstract: High performance, multiple rotor riding trowels for finishing concrete comprise hydraulic circuitry enabling complete joystick control to the operator. The rigid trowel frame mounts separate spaced-apart, downwardly-projecting, bladed rotor assemblies that frictionally engage the concrete surface. The rotor assembly blades finish the surface while supporting the trowel. The rotor assemblies are tilted with double acting, hydraulic cylinders to effectuate steering and control. Double acting hydraulic cylinders also control blade pitch. Separate gimbaled, hydraulic motors revolve each rotor assembly. A joystick system enables operator hand control with minimal physical exertion. The joystick system activates electrical circuitry that fires solenoid control valves to energize various hydraulic cylinders that tilt the rotors and alter blade pitch. The hydraulic steering control circuit driven by a motor driven pump pressures a flow divider circuit to control the solenoid tilt control valves. A bypass-valve in line before the flow divider enables an operator to customize the trowel steering speed. A motor drive control circuit responsive to a hydraulic pump controls each hydraulic drive motor, and provides for speed control and heat dissipation.

Power steering system with hydraulic reaction

Abstract: A power steering system which includes a fluid source that supplies pressure fluid of a constant flow rate, a fluid motor for supplementing manual steering torque, a servo-valve for distributing fluid to the fluid motor, and a reaction device for applying hydraulic reaction or feeling to a starting wheel in accordance with fluid pressure applied thereto. A magnetic control valve having a solenoid therein is connected to the reaction device to vary fluid pressure applied thereto in a predetermined range of pressures in accordance with vehicle operating condition. A mechanism for controlling the fluid pressure applied to reaction device at a predetermined pressure in the predetermined range of pressure even when the current supplied to the solenoid becomes abnormal is incorporated in the magnetic control valve.

Latching linear solenoid

Abstract: A linear solenoid includes a pair of soft iron pole members which are in a spaced apart linear arrangement. A permanent magnet is attached to the end of a plunger which rides between the pole members. When a first of two electro-magnet coils is energized the plunger which is latched to one of the pole members is repelled to the opposite pole member and latched. When the second coil is energized the plunger returns to the original pole member and is latched.

Hydraulic and electric powered parking brake system

Abstract: The hydraulic and electric powered parking brake system (10) comprises a redundant or simultaneous operation of the system (10) to meet Federal Safety Standards. A dash mounted control knob (24) operates a hydraulic brake application mechanism (20) which transmits a hydraulic pressure to a hydraulically operated pilot piston (70). The control knob (24) also operates a switch (30) to send an electrical signal to an electrical control unit (100) which sends an electrical signal to a solenoid (80). The solenoid (80) and hydraulic pilot piston (70) can be operated, independently or simultaneously, to displace a control valve (60) located within a parking actuator assembly (114) and effect the release of hydraulic pressure from spring apply and hydraulic release actuators (16, 90) connected to vehicle brakes (18). The hydraulic fluid is released past the control valve (60) and to a reservoir (52). When the parking brake knob (24) is returned to an at-rest position, either the solenoid (80) or the hydraulic pilot piston (70), independently or simultaneously, can be operated to effect closing of the control valve (60) and actuation of a motor pump (50) which transmits fluid pressure to the spring apply and hydraulic release actuators (16, 90) so that the actuators will release the vehicle brakes (18) connected therewith.