Abstract: A system for electronically selecting and establishing test loop circuits between a remote test position and any of a large number of communication lines at an access location. Extensive logic circuits at the access end and the test end exchange information and display for the operator if the circuit is ready, if there has been a transmission error or component failure, if the circuits are busy, and other factors that affect the system thereby making the operator's task easier. Fail safe circuits prevent opening of telephone lines by access circuitry malfunctions.

Abstract: A seat anchor is provided including an elbow bolt connecting the horizontal portion of a seat support to a vehicle portion thereof attached to the under surface of the seat. This anchor secures the frame of the seat to the bracket, encircling a portion of the frame. The elbow bolt holds the seat from movement relative to the frame.

Abstract: A molded electrical jack housing adapted for mounting directly on a printed circuit board in which the electrical contacts are all inserted from one side of the housing and have connection lugs extending through the opposite side of the housing and in which the electrical contacts are formed from spring metal material and shaped to have tabs which rest on special plateau areas formed in the housing.

Abstract: An intermediate patch cord for connecting together two other patch cords including a connecting wire with a standard plug receiving jack at each end. The plug receiving jack is formed from a pair of identical plastic molded housings and incorporates a pair of springable plug grasping fingers extending from one end to hold a standard plug in the jack housing.

Abstract: A circuit for maintaining any medium between two predetermined limits, as for example, the water level in a sump. Current to drive the sump pump is gated through a programmable unijunction transistor which transistor is turned on by a signal from an upper limit probe in the sump which is activated by the water level reaching the probe position. When the transistor turns on it activates another portion of the circuit also utilizing programmable unijunction transistors which operates to turn off the first transistor in response to a signal from a lower limit probe positioned in the sump at a lower level. Silicon controlled rectifiers or transistor regenerative switch circuits may be substituted for the unijunction transistors.

Abstract: Telephone line testing equipment in which a series of alternating current tone pulses are transmitted from the central office along the lines to a sensing means placed at a remote point in the circuit. The sensing means receives the coded tone pulse sequence, decodes it to determine if the address is correct, and if so, what information is present, and then either connects or disconnects the remote equipment from the line or, in the alternative, connects suitable loopback testing circuits to the line.