Abstract: Mower castor swivel and steering control systems may include a pair of castor wheel engaging assemblies carried by the lawnmower frame of the riding lawnmower. The pair of castor wheel engaging assemblies may be configured for selective actuation to prevent swiveling of the pair of front castor wheels, respectively, on the riding lawnmower. At least one actuating device may operably engage the pair of castor wheel engaging assemblies. The at least one actuating device may be configured to actuate the pair of castor wheel engaging assemblies responsive to selective actuation by a mower operator of the riding lawnmower. A castor wheel steering assembly may operably engage the pair of castor wheel engaging assemblies. The castor wheel steering assembly may be configured to steer the pair of front castor wheels responsive to selective actuation by the mower operator simultaneous with actuation of the at least one actuating device.

Abstract: A controller for a starter.generator used with an aircraft engine, includes means for monitoring field return current in a generator field winding; means for monitoring generator voltage; and microprocessor control means for adjusting generator field current as a function of the field current and voltage and field return current. The field return current and output voltage monitoring functions allow for open field, field integrity, over voltage, field weakening and torque limiting functions to be realized in an integrated programmable system configuration.

Abstract: A controller for a starter/generator used with an aircraft engine, includes means for monitoring field return current in a generator field winding; means for monitoring generator voltage; and microprocessor control means for adjusting generator field current as a function of the field current and voltage and field return current. The field return current and output voltage monitoring functions allow for open field, field integrity, over voltage, field weakening and torque limiting functions to be realized in an integrated programmable system configuration.

Abstract: A controller for a starter/generator used with an aircraft engine, includes means for monitoring field return current in a generator field winding; means for monitoring generator voltage; and microprocessor control means for adjusting generator field current as a function of the field current and voltage and field return current. The field return current and output voltage monitoring functions allow for open field, field integrity, over voltage, field weakening and torque limiting functions to be realized in an integrated programmable system configuration.

Abstract: A controller for a starter/generator used with an aircraft engine, includes means for monitoring field return current in a generator field winding; means for monitoring generator voltage; and microprocessor control means for adjusting generator field current as a function of the field current and voltage and field return current. The field return current and output voltage monitoring functions allow for open field, field integrity, over voltage, field weakening and torque limiting functions to be realized in an integrated programmable system configuration.

Abstract: A fence guard for installation along a fence line for the purpose of preventing or retarding the growth of grass, weeds and other vegetation under and along a fence, which fence guard includes an elongated grass shield fitted along the straight runs of the fence line adjacent to the fence posts and extending outwardly from one or both sides of the fence line to cover the ground and grass along the fence. A swivel joint for attachment to the base of fence posts in the fence line at points where the fence changes direction; specially configured gate plates for mounting to the base of the gate posts installed in the fence and corner post plates provided at the base of each fence post in the fence line at points where a 90 degree directional turn is achieved, or where several fence lines meet, to match cooperating lengths of the grass shield.