Abstract: A furniture article such as a bookshelf unit has a pair of back panels which are arranged edge to edge in extension between upright side members. The outer edges of the panels are received in grooves formed in the sides. The combined width of the panels is greater than the distance between the side members so that the panels initially overlap at their inner edges. The panels are displaced to position their inner edges in butting engagement and are then snapped into a common plane with the edges remaining butted together to retain the panels under compression in the assembled condition.

Abstract: A position indicating device which attaches to an X-ray machine is provided with a collar onto which a lead lined cylinder may be threaded. The cylinder has an end plate through which a rectangular opening is formed in order to provide a rectangular X-ray beam for use in cephalometric radiography. When the cylinder is removed, a circular beam is emitted for use in intra-oral radiography.

Abstract: A disposable filter cartridge for suspension from the tube sheet in a baghouse. A wire mesh cylindrical cage is rigidly fitted with a diffuser having plurality of flexible fingers which sealingly encircle the tube sheet collar. A fabric filter sleeve encases the cage and has an upper seal skirt of greater diameter than the outside diameter of the diffuser. The cage may be equipped with a bottom end cap having an annular groove adjacent the cage to facilitate crimping thereon. The bottom of an open filter sleeve may be provided with a cuff having a continuous sealing band disposed therein of slightly larger diameter than the bottom end cap.

Abstract: In a furnace having a boiler in which a pair of spaced electrode plates are supported, electric current is applied to the electrodes to generate steam which flows out of the boiler through a steam conduit to a heat exchanger. A blower forces air across the heat exchanger and out of the furnace through duct work for distribution to the rooms that are to be heated. An equalizer line is connected from the steam conduit to the bottom of the boiler. A return line, having a Hartford loop located above the bottom of the boiler but below the water level of the boiler, returns condensate from the heat exchanger to the boiler through the equalizer line.

Abstract: A disposable waste bag arrangement for small pets. The waste bag is attached to the body of the animal either by means of trousers or a harness which is worn by the animal. The bags are connected with mounting pads which snap onto the trousers or harness. An outer cover may be mounted to surround the bag to protect it against punctures and other damage.

Abstract: A brake release arrangement by which damage which otherwise would result from the application of excessive side loading to rotating equipment such as the boom of a digger derrick or crane is avoided. The drive system for rotating the boom includes a hydraulic motor, a non self-locking speed reducer and a spring applied, hydraulically releasable brake. Included in the brake release mechanism is a line which taps into the hydraulic line leading to the power equipment mounted on the boom and whose operation develops side loads. An adjustable pressure reducing valve in the tap line provides a fluid output at a reselected pressure to a small chamber in the brake housing. The pressurized fluid in the chamber acts on a piston which, when the side loading on the boom is great enough to cause damage, partially relaxes the brake force thus to permit slippage and back drive of the speed reducer and motor thereby to relieve the side load torque.

Abstract: A whirlpool type hydrotherapy unit includes a centrifugal pump which circulates water in a tub. The pump has a pair of outlets, one of which is a primary outlet immersed in the water to provide a whirlpool effect. A vibrating spray head accessory may be attached to a secondary outlet to provide a water spray and accompanying massage. A large volume of air is induced by aspiration to mix in with the water that discharges into the tub from the primary outlet. The pump is driven by a battery powered D. C. motor which is controlled as to speed and time of operation by solid state controls. Special circuitry also prevents operation of the motor when the battery charger is coupled to an A.C. power supply or when the voltage of the battery falls below a specified value.

Abstract: A centrally located polling system uses conventional telephone dial networks and a means for digital telecommunication to periodically interrogate remote site alarm installations for security related information. Apparatus at the central location retrieves remote site telephone numbers from memory and controls dialing sequences to establish communication exchange between the central and remote sites. Circuit means are provided to validate the communication link, or alternatively, retry the dialing sequence. Apparatus at the remote site continuously monitors the status of a plurality of alarms and is responsive to requests from the central location by means of the telephone dial network. The remote site security status thus transmitted is received and digitally displayed in coded form at the central location.

Abstract: A cleaning purge head for a baghouse traveling centrally of the clean air plenum to isolate and back flush with high pressure air successive compartments of filter bags arranged in two parallel banks of filters. Through a depressible seal, the purge head communicates with a pressure chamber supplying cleaning air. A cam activated valve regulates the bursts of cleaning air supplied to successive filter bag compartments as a delivery conduit registers therewith such that the purge head alternates in cleaning the two banks of filters on successive passes through the baghouse.

Abstract: A method and article for covering and sealing the exposed weld joint area of a pipeline coated with thermoplastic corrosion protective coating is the subject of this application. The article comprises a layer of thermoplastic material that is compatible with the thermoplastic coating. A layer of mastic may also be formed on one side of the thermoplastic material. A resistance wire which is preferably a strip of wire mesh is tack welded or otherwise secured to the thermoplastic strip in two parallel stretches and a third stretch that is transverse to and in contact with the first two stretches. The article is wrapped around the coated pipe with the first two stretches of the resistance wire sandwiched between the pipe coating and the thermoplastic layer of the article and the third stretch of the resistance wire sandwiched between overlapping ends of the layer of thermoplastic material. The resistance wire is then energized to produce enough heat to fuse the two thermoplastic layers into an integral unit.

Abstract: A method of applying foamed insulation to pipe is contemplated by the present invention. The pipe is moved longitudinally while being rotated about its longitudinal axis. A sprayable, foamable liquid is directed onto the surface of the pipe from a stationary location and is allowed to partially rise before a protective outer jacket is wrapped around the rising foam. The wrapping step includes application of sufficient pressure to the foam to increase the final density thereof, at the outer surface, by from 10% to 25% above the density if the foam was allowed to rise uninhibited.

Abstract: A CPR trainer having a patient underlying base frame with a pair of vertically projecting arms. Adjustable shoulder pads extend from the arms above the base for contact with the rescuer's shoulders and adjustable elbow braces also extend from the arms above the base for the contact with the backside of the rescuer's elbows.

Abstract: A golf practice device includes a solid golf ball which is mounted within a thin net of cords carried on the bottom end of a flexible cable. A spring connects to the top end of the cable to absorb the force when the ball is struck. The top end of the spring and cable assembly is supported to swing about the lower leg of a crank arm. The upper leg of the crank arm is supported for rotation on the frame of the device so that when the ball is hit the impact force is distributed between the cable and the crank arm. A pair of cord ends which hang below the ball drag on the ground to quickly stabilize the ball in hitting position for the next stroke.

Abstract: A dough composition including flour, water, yeast, a starch digesting agent, a yeast nutrient and monosodium glutamate is used to prepare baked products such as bread and rolls. After mixing, the dough is allowed to relax and is then machined, proofed and baked. The monosodium glutamate acts as a gluten reducing agent for a short period during mixing and subsequently accounts for an oxidizing effect over an extended period.

Abstract: For a flower pot having a plurality of radially spaced holes in the bottom thereof, an interlocking saucer having a plurality of radially spaced fastener studs projecting from the bottom thereof. The fastener studs define a pot supporting plane located at least 0.1 inch (2.5mm) above the bottom of the saucer and include angled arms having a pot retaining side inclined at a greater angle than the opposite side of the arm. The fastener studs interlockingly fit with the corresponding holes of the flower pot to removably interconnect the saucer thereto.

Abstract: A switch structure detects acceleration in a preselected direction such as, for example, along the pitch axis of an aircraft. The switch has a spring supported mass urged toward a stable centered position within the switch housing. Acceleration displaces the mass such that it trips a spring wire switch mechanism for controlling such avionic devices as the autopilot system of the aircraft. A pair of solenoid coils are wound around the spring mass system on opposite sides of the centered position of the mass. The switch may be preflight tested by successively energizing the solenoid coils to attract the mass toward the centers of the solenoid fields, thereby artifically displacing the mass against the spring wire switches.

Abstract: A ladder has adjustable extensions which provide downward continuations of its legs. By securing the extensions in appropriate positions, the legs are provided with different effective lengths so that the ladder may be used safely on staircases and on other uneven or sloping terrain.

Abstract: To detect fluid leakage in a hydraulic directional control valve, a plate is installed between the valve and its mounting subplate. Passages through the plate connect with the pressure inlet and tank ports of the valve, while the load ports of the valve are blocked by the plate. Leaking fluid flows out of the tank port and passes through an orifice across which a pressure differential develops in proportion to the leakage rate. The pressure differential is applied to a piston which retracts an indicator knob within the plate when an unacceptable leakage rate is present. A modified form of the invention detects the combined leakage rate in the valve and the load which it controls. Rather than blocking the load ports, the modified plate has passages which connect with the load ports of the valve to deliver fluid to the load. An orifice is located in the passage of the plate which connects with the pressure inlet port of the valve.

Abstract: A hay handling device is mounted in a vehicle bed to load, carry, and unload large hay bales. A rugged frame of the device is securely held in the vehicle bed by brackets which release the frame in selective fashion to permit its removal. A horizontal support member which is pivoted to the frame carries a central spear which is adapted to penetrate a bale resting on the ground. The spear is secured to a small sleeve which is slidably mounted on an upright post so that the elevation of the spear can be adjusted in order to accommodate bales of various sizes and vehicle beds of different heights. Shorter spears are located on opposite sides of the central spear to cooperate in handling the hay bale. A power winch operates on the upright post to pivot the support member in a manner to raise a bale which the spears have penetrated.

Abstract: A baby carriage stroller has a hollow main body which is mounted on wheels. Parallel pivot arms connect an upper body portion with the main body for movement between an extended upper position and a lower storage position in which the upper body portion is contained within the main body. A foldable main seat assembly is carried on the upper body and a second seat assembly is detachably mounted to an elongate handle by which the carriage may be pushed. The handle folds to a storage position wherein it lies along the main body. A removable canopy structure is included to overlie the main seat assembly.