Abstract: A mailbox operated signal device has a motion detector that is attached to the inside of a conventional mailbox and activates a light and a speaker to alert residents that the mail has been delivered to their mailbox. A wireless transmitter is electrically connected to the motion detector. The wireless transmitter is capable of transmitting a motion detected signal. A wireless receiver is capable of receiving the transmitted motion detected signal. A light is electrically connected to the wireless receiver. The light is for indicating when the motion detected signal is received by the wireless receiver.

Abstract: A machine tool controller and part inspection monitor that controls part cutting by a machine tool (21) and provides a readout of cutter deviation beyond a preset tolerance is disclosed. Axis position sensors (23) continuously sense the position of the part (if the part is moved), the position of the cutter (if the cutter is moved) or the position of the part and the cutter (if both are moved) along various control axes. A data processor (31) uses the sensed axis position data to continuously determine the transfer function of the machine tool (21). The data processor (31) combines the transfer function information with data that defines the centerline of the cut to produce control signals suitable for controlling part and/or cutter movement. The location and amount of deviation from the defined centerline greater than the allowable tolerance are recorded and read out.