Abstract: A method and apparatus for controlling the direction of a defrost device for refrigeration coils includes measuring the current drawn by or the torque produced by a permanent magnet motor, wherein the permanent magnet motor powers a defrost device recurrently back and forth along refrigeration coils and reverses the direction of the permanent magnet motor when the measured current drawn or measured torque produced are at or above a first limit. The method omits the use of switches and sensors to signal when the defrost device is reversed to reduce failures and stoppages.

Abstract: A method and apparatus for controlling the direction of a defrost device for refrigeration coils includes measuring the current drawn by or the torque produced by a permanent magnet motor, wherein the permanent magnet motor powers a defrost device recurrently back and forth along refrigeration coils and reverses the direction of the permanent magnet motor when the measured current drawn or measured torque produced are at or above a first limit. The method omits the use of switches and sensors to signal when the defrost device is reversed to reduce failures and stoppages.

Abstract: An insect trap that uses light, a baited area and a timer to attract, incapacitate and kill insects. The trap is used to capture insects by attraction to a light source and/or a bait source. When the insects are investigating the light and or the baited area, a timer energizes a fan that draws the insects into its blades incapacitating the insects and dropping them into a removable tray. The tray is then dumped and the device is ready for the next cycle.