Abstract: A line test termination device to provide a characteristic signature recognizable by the telephone central office when a continuity test is made on a subscriber line having a pair of electrically conductive paths includes a resistor and a diode connected in series between the conductive paths. A neon tube device placed in series with the resistor and diode will be illuminated when a ringing voltage is applied to the line and no telephone ringing circuit is connected thereto.

Abstract: A line test termination device for use on a telephone subscriber line having a pair of electrically conductive paths to provide an audio-visual indication when interrogated by the telephone central office and a subscriber test to indicate the operability of the subscriber line includes in combination, a first current path having a neon tube and an audio indicator connected in series; a second current path with a first normally open switch, a first resistor, a first zener diode and an indicating meter connected in series, all of which are placed in parallel with the first current path. Additionally included is a current polarizing circuit arrangement connected across the pair of electrically conductive paths to provide a unidirectional flow of current through the first and second current paths regardless of the polarity of voltage applied across the pair of electrically conductive paths.

Abstract: An audible test termination device for providing a characteristic signature to the telephone central office and an audible signal to the customer when a continuity test is made on a subscriber line having a pair of electrically conductive paths includes a miniature audio indicator and a minimum of associated electrical components to indicate to the central office test operator and the customer that the telephone subscriber line is in operating order. One embodiment of the instant invention may be utilized as an additional high impedance ringer for the customer. The present device may be permanently installed across the subscriber line.

Abstract: A shorting cage is provided in a telephone terminal housing having a protector well so that when the protector device is removed from its cooperating well the shorting mechanism in the form of a cage will cause the line to remain shorted until a replacement protector is reinserted into the terminal well.

Abstract: A varying impedance line test termination device for providing a characteristic signature to the telephone central office when a continuity test is made on a subscriber line having a pair of electrically conductive paths includes a first current path having a first resistor and a capacitor connected in series across the electrically conductive line paths and a second current path having a diode and a voltage breakover device connected in series across the capacitor. If the voltage breakover device is capable of emitting light, a flashing indication will be provided when the subscriber line is being interrogated.

Abstract: An automatic tire chain for driver operated vehicles includes a chain device that is moved to the road contact surface of a tire from a position adjacent thereto by means of a spring mechanism placed under tension when the chain is held away from the road contact surface of the tire. A pair of rings, one being fixed to the wheel and the other being slideably mounted thereon are provided with indexing slots. The slideable ring has a chain affixed thereon and is moved relative to the fixed ring by an operator activated engaging mechanism mounted on the vehicle. The engaging means engages the indexing slots and moves the slideable ring relative to the fixed ring while the vehicle moves along the road at a speed less than 10 miles per hour placing the chain adjacent to the road contact surface of the tire.

Abstract: An ultrasonic toothbrush for use in personal dental hygiene care includes an elongated handle member in the form of a hollow housing having disposed therein a low voltage coil and cooperating ferrite core which is driven at ultrasonic frequencies. Affixed to the core is a brush member adapted to be received within the human mouth and moved across tooth and gingival surfaces. The brush member has been adhesively affixed to an impedance transfer device which in turn has been adhesively affixed to the core material. The impedance transfer device insures the maximum transfer of ultrasonic energy from the core material to the brush. The ultrasonic energy driving means for the core requires a relatively low voltage and permits the coil to be sealed in the handle impervious to contamination by water.

Abstract: A telephone ringer isolator includes an electronic switch which enables it to operate at reduced ringer voltages. In the ringer isolator, the central office ringing signal is rectified and voltage doubled across a circuit containing two diodes and two capacitors. The second capacitor is connected across a neon tube. When the voltage across the second capacitor rises to a preselected value, the neon tube is fired to emit light onto a light sensitive resistor which feeds gate current to a Triac to turn the Triac on. The Triac, in turn, grounds the telephone ringer.

Abstract: A station identification circuit arrangement for use with central office equipment that utilizes automatic detection equipment for the detection of one of four parties on a four party-line where a call is initiated from a preselected party's telephone without requiring access to or rewiring of the party's telephone.

Abstract: A liquid sampling apparatus for use in sampling the liquid in a well pipe to determine the surface contaminants contained therein includes an elongated hollow housing for insertion into the well pipe which is adapted to be lowered into the well by means of a flexible line affixed thereto. The other end of the flexible line is affixed to the removable well cap. Disposed above the lower edge of the hollow housing is a valve which includes a cup-shaped closure adapted to cooperate with and seal an opening provided in the bottom thereof by means of the weight of the liquid trapped in the sampling apparatus as it is lifted out of the well pipe.

Abstract: A claw hammer is provided with a wedge-shaped portion on the contact surface between the anvil portion and the clawed portion in order to enable the user thereof to remove nails from a surface with a minimum of effort and a reduced swing of the handle.

Abstract: A highly reliable gas tube arrester capable of protecting both the input and output lines from an excess voltage appearing thereon, includes a hermetically sealed housing, having a plurality of electrodes affixed therein and spaced in a predetermined manner between themselves and the housing to provide a plurality of spark gaps. A breakdown of any one of the spark gaps will ionize a gas disposed within the housing providing a low impedance path between all of the electrodes to the housing which is normally connected to ground potential.

Abstract: A zero pressure accumulator conveyor includes a combination propelling and braking apparatus which is operatively coupled to a plurality of sections arranged in tandem. The combination propelling and braking apparatus is shiftable to either simultaneously engage a plurality of article supporting rollers of the conveyor or simultaneously disengage a plurality of article supporting rollers, thereby preventing contact between articles moving along the conveyor.

Abstract: A system for obtaining body fluids for continuous chemical analysis thereof includes a catheter for obtaining the material to be measured. The surface of the catheter is partially coated with a semi-permeable filter membrane. From the rear side of the filter membrane a plurality of channels are provided which communicate with a series of internal ducts which provide a fluid flow path for the material to be analyzed. The ducts are operatively coupled to a suction device pump and analyzing apparatus which are located remote from the catheter.

Abstract: A mounting arrangement for warp knitting machine elements includes a means for absorbing forces generated during the course of knitting. These forces are transferred to at least two surfaces thereby reducing the size and weight requirements of the working elements permitting the warp knitting machine to operate at higher speeds.

Abstract: An electrochemical measuring electrode has an ion-selective membrane and direct potential take off via an electron conductor. A diffusion barrier layer is provided between the membrane and the electron conductor for the purpose of reducing or eliminating the sensitivity to faults which can be caused by the presence of gases in a medium which is to be analyzed and into which the sensor is introduced. The diffusion barrier preferably comprises an ion-conducting solid-state body having a high diffusion resistance to oxygen.

Abstract: A liquid filter vessel used for the filtering of liquid in a permanent installation provides for a simplified method of replacing the filter bag and includes a removable cover which displaces a relatively large volume of liquid. Removal of the cover from the filter housing, reduces the liquid level within the housing to a level below the lip of the filter bag, making it easy to grab the lip thereof, and remove the bag without coming into contact with the liquid being filtered.

Abstract: An artificial endocrinal gland comprises a blood dialyzer for transferring part of the blood to a measuring liquid in a separate circuit, an analyzer for quantatively determining this part and producing in the measuring liquid conversion products compatible to the patient's metabolism, a controller responsive to the analyzer and a device for supplying quantities of hormone to the patient's body under the control of the controller.

Abstract: A jacquard equipped warp kniting machine is provided with means for maintaining a relatively constant tension on the dropper pin activator cords of the jacquard mechanism during the swing movement of the dropper bar. The means for providing a relatively constant tension includes a second eyelet bar which moves in a direction opposite to that of the dropper bar thereby equalizing the tension of the dropper pin activator cord.

Abstract: A thread inserter and braking mechanism for a knotting apparatus used on spooling machines includes thread inserting and braking arms disposed on either side of the binding heads and external to the housing mounting the knotting apparatus. Brake pads disposed on either side of the housing cooperate with the thread inserter and braking arms and interact with the threads, retaining the threads to be knotted therebetween. The braking action overcomes the pressure exerted against the threads by the lifting arms of the knotting apparatus and retains the threads in position until the threads are released from the binding heads and a tight knot is formed therein.