Abstract: Two probes for tissue impedance measurement each have first and second conductive rings unitarily arranged with an insulative member separating the rings. The conductive rings are coaxially arranged and have individual lead wires connected thereto which extend from one end of the probe for connection to external processing and measuring equipment. One probe is of a size enabling insertion within a blood vessel while the other is for location in an epithelial cavity. In use an alternating test signal is applied to the electrodes of each probe and measurements are taken between the two sets of measuring electrodes determining the impedance of the cavity wall tissue lying between the two probes without passing current through the tissue.

Abstract: The inner end surface of the outer end portion of an electrical connector coupling ring has a set of teeth extending circumferentially about the coupling ring. A metal ring has a bore sufficient to enable it being received onto the connector plug and an outer diameter sufficient to enable receipt within the coupling ring and allow the coupling ring to rotate thereabout. One or more keyways on the decoupling ring are interlocked with keys on the connector plug maintaining the antidecoupling ring and plug in fixed relationship to one another, irrespective of movement of the coupling ring. At least one elongated leaf spring has an end formed into a detent that rides along and between the coupling ring teeth. The other spring end is rotatably located on a pivot pin mounted to the circumferential periphery of the anti-decoupling ring.

Abstract: The adjustment cords of a window blind extend downwardly over a first pin fixedly located within a headrail. A second pin in the headrail adjacent the fixed pin has its ends slidably received in a slot enabling movement in a plane closely adjacent to the first pin. The second pin is in continuous contact with the cords and the relative dimensions of the pins and the cofining constraints of the headrail are such that for the standard diameter of the cord, locking engagement will be obtained when the two pins are located in the same horizontal plane. The guide slot for the second pin allows the pin to move to a point past the horizontal plane of normal locking engagement and closer to the fixed pin enabling locking engagement even if the cord diameter is less than normal. The second pin is constructed of a leaded steel subjected to sandblasting which produces a rough and pitted surface on the pin enhancing frictional engagement with the cord.

Abstract: A current detection device has an annular dielectric substrate with a thin (e.g., less than one skin depth at maximum frequency) resistive foil laid down on the substrate outer surface and extending completely thereabout. Annular metal rims are affixed to the substrate edges respectively contacting the metal foil or film. A conductive strip of appropriate dimensions is received onto the outer edges of the metal rims and extends about the complete circumference of the rims. A resistive material is used to secure the conductive strip to the edges of the rims so that the entire resistance of the strip and resistance material exceeds that of the sensing metal foil to prevent shorting out of the foil.

Abstract: One connector part has an outer locking shell spring-loaded to move axially and with an interior circumferential cavity which can be aligned with locking fingers when the locking shell is subjected to a predetermined amount of separating force enabling the locking fingers to be released. The other connector part is spring-loaded to hold further locking fingers in contacting relation to an outer surface of the connector shell. When an axial force applied to mated connector parts exceeds the first predetermined releasing force and connector release has not been achieved then the spring-loaded other connector part allows its fingers to extend beyond the innermost end of that connector part releasing the fingers from locking engagement and, therefore, releasing the connector parts.

Abstract: A section of metal pipe has one end connected to a main line pipe. A hollow cylindrical plastic piston having a plurality of O-rings thereabout is slidingly and sealingly received within the open end of the metal section. A plastic carrier pipe is fixedly received within the outwardly facing end of the piston for suitable interconnection to other equipment. First and second limits are spaced along the pipe section to locate the piston within the pipe section. These limits may be flanges machined into the pipe section, or the pipe section may be rolled so as to include an inwardly directed, circumferentially extending ridge. In a further version, the transition joint is incorporated into a riser arrangement in which the plastic carrier is located within an outer tubing or pipe and held spaced from the tubing walls throughout the entire length of the tubing. Also, replacement of a service line is accomplished by threading plastic pipe through original line and terminating via transition joints at each end.

Abstract: One side of a cabinet drawer shelf is at least partially closed off to prevent storing access while the other side is open for storing microfilm cartridges or other items. A cartridge is of such dimensions as to extend outwardly from the shelf confines enabling ready access for removal and replacement. An elongated pressure exerting retention strip located in the top portion of each shelf is constructed of a flat sheet-like strip of a springlike material having a plurality of transfer slits therein. The strip lateral edges are confined in a pair of spaced apart grooves distending the strip to engage and hold cartridges on the shelf. In another version, a strip of a plastic foam is located on either the shelf top surface with a thin strip of a material having low frictional sliding surface thereon, such as Mylar, for example, being located thereover.

Abstract: One end of an electrical connector first contact is a metallic cylinder which is hollow to receive a cable wire for soldered or crimping securement. A second contact has a body portion constructed substantially the same as the first contact except that its pin end is faced off to a flat surface. A hollow cylindrical metal shell with one closed end and a flanged open end is slidingy received on the body portion other cylindrical end. Mating engagement of the connector parts brings the radiused pin end of the first contact into pressurizing connection with the second contact metal shell establishing the desired connection. Unmating may be accomplished by either axial or transverse relative movement of the connector parts. In a further embodiment the hollow cylindrical metal shell has one or more inwardly formed spring fingers that slide over the enlarged head during assembly and prevent inadvertent removal of the shell from the rest of the contact.

Abstract: An electrical contact for use in a releasable connector part having a closed-end metal shell with resilient springlike sidewalls, the shell closed-end contactingly covering an opening in a shield plate when the connector is unmated. When mated, a corresponding contact in the other connector part passes through the shield plate opening moving the metal shell closed-end away from the shield plate and into current conducting relation with a shaft connected with a cable wire. In an alternate version, the metal shell closed-end moves into connective relation with an end wall of a further metal shell interconnected with the cable wire.

Abstract: A cylindrical rubber or elastomeric gasket which is L-shaped in cross-section having an outwardly extending rim or flange is initially located between a cylindrical backshell and a connector part which the backshell is to be magnetically clamped. The internal diameter of the seal closely approximates the major diameter of the connector part. The backshell end is slid onto the connector part and, more particularly, onto and over the seal with the seal flange extending around the end of the backshell with its outermost surface abutting against a flange on the connector part. The seal in this way accomplishes both aligning of the backshell with the axis of the connector part for the electromagnetic forming step and, as well, effects environmental sealing after the backshell is fully in place.

Abstract: Two probes for tissue impedance measurement each have first and second conductive rings unitarily arranged with an insulative member separating the rings. The conductive rings are coaxially arranged and have individual lead wires connected thereto which extend from one end of the probe for connection to external processing and measuring equipment. One probe is of a size enabling insertion within a blood vessel while the other is for location in an epithelial cavity. In use an alternating test signal is applied to the electrodes of each probe and measurements are taken between the two sets of measuring electrodes determining the impedance of the cavity wall tissue lying between the two probes without passing current through the tissue.

Abstract: A ladder support has pedestals universally mounted so as to accommodate irregular ground surfaces. Each pedestal is an enlarged circular affair providing frictional engagement with the ground plane. A pair of spring-loaded jaws extend parallel to one another for receiving the lower end of the ladder, and which, due to the weight of the ladder, are levered against a resistant spring force causing the jaws to close on the end of the ladder and secure it by clamping engagement. The jaws are mounted on end plates which are, in turn, pivotally mounted onto end wall assemblies that can rotate providing a self-adjustment of the lower end of the ladder between the jaws.

Abstract: A pair of locking rods are pivotally interconnected to opposite sides of a handle manipulated swivel plate and have end portions that extend, respectively, outwardly through openings in end walls of a tailgate housing. Locking plates fixedly mounted to a truck bed adjacent each side of the tailgate housing include openings for receiving the outer end portions of the locking rods and, in this manner, lock the tailgate in closed position. Coil springs serve to resiliently maintain the locking rods in an outwardly extending relation and simultaneously cause the end portions of the rods to ride up and over a locking entrance camming surface on the locking plates before being fully received within the openings of the locking plates. This latter feature permits slamming or closing of the tailgate without handle manipulation.

Abstract: A venetian blind tilter mechanism housing has a first surface which bears against the front wall of the headrail, and a longitudinally extending slot on the surface facing the headrail back wall forming a spring plate which fits under a downwardly turned headrail back wall edge securing the housing within the headrail. The tilter mechanism has a spur gear received onto a control axle for common rotation. The spur gear has a smooth peripheral portion extending for a substantial angular extent that lacks gear teeth with conventional gear teeth over the remainder. An elongated shaft with a worm gear extends upwardly into the housing through an opening in the headrail bottom wall for meshing engagement with the spur gear.

Abstract: The lock housing has a slot in a top wall via which a coded card key can be inserted to bring into alignment coded magnetic areas on the card with magnetically responsive elements of the lock to unlock the locking mechanism and enable rotation of either a knob or lever arm to open the door. The card moves a spring actuator against a coupling spline to engage it with a spindle spline carried by a shaft interconnected with the knob or lever arm handle. The sliding coupling spline is integral with parts which interrelate with the door lock mechanism such that rotation of the knob or lever arm will now effect release of the door locking mechanism. When the card is fully inserted, the mechanism is maintained in the unlocked condition and the card may be released to turn the knob or handle with the same hand. Spring-loaded members separate the coupling and spindle splines as the magnetic card key is withdrawn from the housing slot.

Abstract: Each hanger arm includes a stub shaft with a locking notch immediately adjacent. Elongated extender arms, one for each hanger arm, each include a hollow end which can be received onto a locking stub shaft and have detent parts to be snapped into the adjacent locking notch. To release an extender arm from the hanger body, it is swung outwardly and upwardly a slight amount, which removes the detent from the notch allowing the extender arm to be pulled off the hanger body stub shaft. The outer end of an extender arm may be provided with a similar stub shaft enabling a second extender arm to be releasably locked to a first extender arm providing further total arm length.

Abstract: A housing with separate chambers into which individual quantities of animal food can be located has a cover located over the top of the chambers leaving an entrance opening via which foodstuffs can be loaded therein. A generally vertical housing front wall includes exit openings in communication with each of the internal chambers. Door panels, one for each exit opening are pivotally connected to the housing to swing from a first position closing off a chamber exit opening, to a lower position under the action of gravity leaving the exit opening unimpeded by the door panel. Latches having parts which are biased by gravity to lockingly secure a door panel are movable in a direction to release the door panels by a continuous moving closed-loop actuator.

Abstract: A cord lock having a first movable pin at one side of the cord, the other side of the cord being supported by a fixed pin, the movable pin pinching or clamping the cord against the fixed pin. The movable pin has toothed end portions and splines in the central portion. The toothed end portions mesh with racks within a housing to maintain a constant attitude for the moving pin and the splines engage the cords. A rectangular guide slides into the open end of the headrail with a first molded plastic part fitting over the open end of the headrail and end of the guide. The cord lock housing fits onto the molded plastic part and is free to rotate within the part providing self adjustment of the cord during use.