Abstract: A method and apparatus or tool for pulling wire through a wall or panel formed by spaced apart vertical studs, a plate at one end of said studs, and opposed wall panels mounted on said studs. An opening is cut through one of the wall panels between the studs and a hole is drilled in the plate using a long, flexible drill bit. A wire stringing tool formed by an elongated stiffly flexible rod at least partially covered with an elongated, flexible, expandable and contractible woven sleeve is inserted through the opening between the panels and through the drilled hole. The rod and sleeve is slightly retracted to form a loop in the sleeve at the inserted end of the sleeve-covered rod. The loop in the sleeve is hooked with an elongated hooking rod and the sleeve is pulled through the hole to position its other cut end at a point remote therefrom.

Abstract: A method and apparatus or tool for pulling wire through a wall or panel formed by spaced apart vertical studs, a plate at one end of said studs, and opposed wall panels mounted on said studs. An opening is cut through one of the wall panels between the studs and a hole is drilled in the plate using a long, flexible drill bit A wire stringing tool formed by an elongated stiffly flexible rod at least partially covered with an elongated, flexible, expandable and contractible woven sleeve is inserted through the opening between the panels and through the drilled hole. The rod and sleeve is slightly retracted to form a loop in the sleeve at the inserted end of the sleeve-covered rod. The loop in the sleeve is hooked with an elongated hooking rod and the sleeve is pulled through the hole to position its other cut end at a point remote therefrom.

Abstract: A method and apparatus or tool for pulling wire through a wall or panel formed by spaced apart vertical studs, a plate at one end of said studs, and opposed wall panels mounted on said studs. An opening is cut through one of the wall panels between the studs and a hole is drilled in the plate using a long, flexible drill bit. A wire stringing tool formed by an elongated stiffly flexible rod at least partially covered with an elongated, flexible, expandable and contractible woven sleeve is inserted through the opening between the panels and through the drilled hole. The rod and sleeve is slightly retracted to form a loop in the sleeve at the inserted end of the sleeve-covered rod. The loop in the sleeve is hooked with an elongated hooking rod and the sleeve is pulled through the hole to position its other cut end at a point remote therefrom.

Abstract: A method and apparatus or tool for pulling wire through a wall or panel formed by spaced apart vertical studs, a plate at one end of said studs, and opposed wall panels mounted on said studs. An opening is cut through one of the wall panels between the studs and a hole is drilled in the plate using a long, flexible drill bit. A wire stringing tool formed by an elongated stiffly flexible rod at least partially covered with an elongated, flexible, expandable and contractible woven sleeve is inserted through the opening between the panels and through the drilled hole. The rod and sleeve is slightly retracted to form a loop in the sleeve at the inserted end of the sleeve-covered rod. The loop in the sleeve is hooked with an elongated hooking rod and the sleeve is pulled through the hole to position its other cut end at a point remote therefrom.

Abstract: A drilling guide or jig for guiding an elongated drill bit for drilling a long hole through a panel such as a door from one edge to a point adjacent another edge thereof. The guide is formed by a rigid, elongated, rectangular base plate defining an elongated slot and positionable along one edge of the door. A pair of arms are mounted one on each long side edge of the plate at about the midpoint thereof and extend generally perpendicularly to the plate. The arms define at one end a pair of spaced apart jaws extending from said plate and adapted to hold the plate on the door or panel. The arms further define a pair of spaced apart support members extending from the plate opposite to the jaws. A drill guide block is pivotally mounted between the free ends of the support members in spaced relation to the plate, and adjustably supports a drill guide tube extending between the arms.

Abstract: A drilling tool for drilling a curved hole. The tool includes a curved guide tube for positioning the tube in drilling position against a wall and a flexible shaft extending through the guide tube having a drill bit on the end thereof adjacent the outlet end of the tube and a shank on the opposite end engaged in a drill tool chuck. Operation of the drill tool rotates the drill bit and the tube guides and directs the bit to drill a curved or angled hole. The drill bit can be a spade bit, a spiral bit or a ball mill.

Abstract: A counterbore for enlarging an existing hole in the presence of a wire having an end extending through the hole. The counterbore includes a twist drill bit of a size of the enlarged hole to be drilled, a shank at the rear end of the bit for engagement with a drill chuck, and a pilot shank extending from the cutting end of said bit. A swivel is mounted at the leading end of the pilot for engagement with the wire during counterbore drilling. The swivel and pilot guides the wire into the hole without twisting during drilling of the counterbore and extracts the wire from the counterbore as the twist drill bit and pilot shank is withdrawn.

Abstract: A long, narrow, rigid panel supports a row of wheels beneath each long edge. The wheels are spaced sufficiently close together and are small enough to roll over the usual size joists and trusses and to span at least two so that a person lying on the panel can propel by arms or legs over an irregular surface such as in the confined space of an unfinished attic with a low roof. The device separates into two parts for ease of storage and access to confined spaces. The two parts join at an angle of less than 180 degrees. Since the two joined parts do not lie in a common plane, the user can balance over, and be supported by, the four wheels adjacent the joint when on a flat surface. This makes it easier to pivot and change direction of movement than when all the wheels are in contact with a flat surface. Optional plow-like devices can be attached to the front end to move protruding insulation out of the way.

Abstract: A drill bit having an elongated, stiffly flexible shank and integral, hardened, enlarged cutting head and tip is adapted to maintain a penetration angle through a plurality of spaced wooden objects while being rotatably driven by a drill. The tip of the drill bit forms a portion of a cutting head and is of generally triangular shape having two relatively enlarged opposed flat surfaces joined by two tapered surfaces. The tapered surfaces intersect at a tip edge defined by a line which makes an acute angle with a plane bisecting said drill bit along the longitudinal axis thereof, and which plane is perpendicular to the flat surfaces.

Abstract: A single wire antenna placed in proximity to an area to be protected senses the presence of electromagnetic fields including the normal ambient field and modulation thereof resulting from the presence of a moving intruder. The antenna signals are demodulated and filtered to provide the input to circuitry for inspecting these signals and producing a signal based upon differentiation between normal transient signals and random modulation signals associated with the movement of an intruder. Digital counter circuitry provides the differentiation and various time-out features can be incorporated to control the generation and/or transmission of alarm signals. The system includes various elements to permit easy testing of system operations by the user.

Abstract: A circuit for energizing an annunciator or warning device is actuated whenever a door or the like is in any position other than in proximity to preselected locations such as the two ends of intended travel. Proximity detectors arranged in conformity with the limits of intended travel effect electrical switching so as to interrupt the annunciator circuit whenever the door is within acceptable distance of the limits. The proximity detectors can be provided by a dual magnetic arrangement with one magnet associated with travel and the other permanently affixed relative to a reed switch or the like. The fixed magnet maintains the reed switch closed except when its magnetic field is effectively cancelled by the movable magnet.