Abstract: An emergency lighting unit having physical dimensions and electrical and electronic components and circuitry such that it can be directly substituted for a conventional hot cathode type fluorescent lamp in a conventional fluorescent lamp fixture which incorporates a rapid start type ballast. The emergency lighting unit comprises a direct current power supply in the form of rechargeable batteries, a light source in the form of one or more groups of low voltage high intensity miniature lamps, and electronic circuitry and components utilizing power supplied by the rapid start ballast for charging the batteries, monitoring their condition and reacting accordingly, and detecting the state of the normal alternating current power source and reacting accordingly. In a preferred embodiment, the emergency lighting unit utilizes pulses to detect the emergency or "FAIL" state of the system power. The pulses are supplied by a unique pulser unit which is designed to be directly substituted for a standard wall switch.

Abstract: For an agricultural implement a distributor for feeding seed and/or fertilizer from an air duct to a series of distributor tubes leading to planter units in which the air-entrained seed and/or fertilizer is separated in the distributor to pass some air continuously to the distributor tubes and the remaining air and the seed and/or fertilizer is directed by a rotating deflector to flow sequentially into the series of distributor tubes.

Abstract: A fence formed of hollow fiberglass posts and rails. The posts have apertures formed therethrough transverse to their lengths for receiving the rails. Two hollow rails extend into an aperture from opposite sides of a post with their ends located in the aperture. A hollow connecting member is located within the two hollow rails for connecting together the ends of the two hollow rails. The hollow connecting member has a slit formed through its wall along its length and is compressed such that it may be located within the two hollow rails. The hollow connecting member when located within the two hollow rails expands outward against the walls of the two hollow rails.

Abstract: A gate member has its lower end pivotally coupled to the lower ends of two spaced apart posts for pivotal movement about a horizontal axis whereby the gate member may be moved between an upright closed position and a lower open position. Closing means is provided for normally maintaining the gate means in its upright closed position.

Abstract: A manually operated hair cutting device having a movable spring wire extending through the device. The wire has a base end for engaging one's head to regulate the length at which the hair is cut. The other end of the wire is connected to an activator which is adapted to be moved to forward and rear positions. As the activator is moved forward, the wire is moved through the device such that its base end is moved away from the cutting teeth. When the base end of the wire engages the head, and the activator is moved forward, the device moves upward along the wire. A movable stop normally prevents the handles from being moved together to prevent hair cutting action. An adjustable engager on the activator engages the stop and moves it out of the way as the activator moved forward to allow the handles to be moved together for hair cutting purposes.

Abstract: A hand tool of the type having a closed loop blade. The two ends of the blade overlap each other and are spot welded together. A rectangular shaped hole is formed through the base of the blade. The handle of the tool is formed of two members. The forward member of the handle has a hole formed therethrough with the forward end of the hole being rectangular in shape. The rear end of the handle has a threaded hole formed into the forward end thereof. A carriage bolt is used to secure the two members of the handle together and the blade to the forward member of the handle such that the blade cannot turn relative to the handle.

Abstract: A borehole tool member has an elongated slot with a surrounding seal for engaging the wall of the borehole for sampling fluid from the subsurface formations. A passage extends from the slot through a portion of the tool member to an upper opening which is connected to a conduit that extends to the surface. The seal surrounding the slot is forced against the borehole wall by two pistons located in two cylindrical chambers formed into the tool member. The pistons are actuated for movement outward of the tool member by fluid under pressure injected from the surface by way of a pressure control line extending from the surface to a second passage formed in the tool member and which extends to the two cylindrical chambers. Springs are provided for returning the pistons inward upon release of the fluid pressure in the cylindrical chambers.

Abstract: The invention relates to improved systems and methods for selectively firing perforating guns in well bores and is concerned primarily with the production of a positive confirmation to the effect that each actuation at the operator control station intended to cause a firing of a particular shaped charge did or did not in fact result in the firing of that shaped charge. Such positive confirmation is accomplished by methods which involve the passage of measuring current from a constant current source through certain conductive loops to develop signals that are a function of the conductive loop resistance, the storage and comparison of said signals, and the display of resultant information. Due to certain phenomena, satisfactory measurement results will not be achieved unless a measuring current of substantial magnitude is used. The various parameters involved are treated.

Abstract: The invention relates to a temperature responsive control assembly which uses the volumetric expansion of a substance having a high coefficient of expansion, to expel a piston from a cylinder, such movements of the piston relative to the cylinder being used to control relative movements between first and second load elements, such as for example a window and a window frame, with the cylinder being connected to the first load element and the piston being connected by way of a high leverage operating linkage with the second load element, and wherein the thermally expansive substance is located in the cylinder between end plugs and the piston passes through one of the end plugs there being shaft seal means carried by the end plug and sealing around the piston passing through it, the piston having its inboard end immersed in the thermally expansive substance.

Abstract: The invention provides an improved method of testing conductor pairs in a telephone cable to determine presence or absence of a customer phone, its location relative to a cable throw or test location and the type of service. Certain types of trouble shooting tests can also be made. The improved method involves utilization of a Wheatstone bridge type connection wherein first and second legs have a common connection at one end to the central office direct current voltage source and consist respectively of a conductor of a pair in a first cable and its corresponding half tap conductor in a second cable; wherein a meter is connected between the first and second legs at the cable throw or test location; wherein a third leg comprises a customer telephone or a test pair; and wherein the fourth leg comprises either an open, or selectably either a variable resistance or a variable reactance, or both.

Abstract: A lighted exit sign comprising a light transmitting plate having a viewing side and upper and lower edges onto which light can be projected for transmission into the plate for viewing from the viewing side. Upper and lower printed circuit boards are supported close to the upper and lower edges of the plate. A plurality of small incandescent light bulbs are secured to the upper and lower circuit boards for producing light when energized for projection onto the upper and lower edges for transmission into the plate for viewing from the viewing side. A white, light reflecting layer is formed on the side of the plate opposite the viewing side. The letters EXIT are formed on the viewing side in two layers. The first layer is white in color and is secured directly to the viewing side. The second layer is preferably red in color and is secured to the first layer. A transformer is employed for converting an A C voltage to a level below the rated voltage of the bulbs and to a level above the rated voltage of the bulbs.

Abstract: A device for full depth hand routing characterized by a two piece base including a foot block and an attachment block, the attachment block being held to the foot block by a connector bolt and two adjusting screws to enable attaining parallel planes for a tool in the base of the block; a cantilevered holder extending from the attachment block; a tool on a shaft that is powered by a motor within a housing that has a substantially cylindrical barrel and a protruding threaded male part threaded engaging a threaded aperture on the cantilevered holder; an indicator scale around the base of the barrel and above the threads; and indicator carried by the attachment block and extending upwardly adjacent the depth scale such that accurate depth positions can be attained for routing to a desired depth. In a preferred embodiment, the cantilevered holder comprises a ring that allows 270.degree. visibility about the routing tool. Also in the preferred embodiment, the foot block has an upstanding flange at 90.degree.

Abstract: The invention pertains to improved single handle mixing valves suitable for use in back to back installations, as for example tub/shower valves in an apartment building or hotel. In such installations it is important to provide for proper orientation of valve water mix control parts so as to prevent the water mix from being uncomfortably or dangerously hot in the initial phase of valve opening. The invention provides structure and arrangement such that proper orientation can be achieved by a simple re-orientation or reversal of a part or parts exteriorly of the valve body.

Abstract: Improved edge lighted devices incorporate one or more light transmitting body assemblies of unique design, resulting in superior performance from both brightness and energy efficiency standpoints. Techniques for obtaining advantageous light transmitting body surface treatment are disclosed. Also disclosed are arrangements for reducing the amount of material utilized for the light transmitting body.

Abstract: A fan for attachment to fan clutch housing members having supporting shoulders at two different radial distances from their axis, respectively. The fan comprises a plurality of fan blade supporting arms extending radially outward from a hub and a central opening formed through the hub. The central opening is defined by a plurality of angularly spaced apart inner arcuate edges located at a first radial distance from the axis of the hub and a plurality of angularly spaced apart outer arcuate edges located at a second radial distance from the axis of the hub, wherein the second radial distance is greater than the first radial distance.

Abstract: An improvement in a heliostat having a main support structure and pivoting and tilting motors and gears and a mirror module for reflecting solar energy onto a collector, the improvement being characterized by an internal support structure within each mirror module and front and back sheets attached to the internal support structure, the front and back sheets having the same coefficient of thermal expansion such that no curvature is induced by temperature change, and a layer of adhesive adhering the mirror to the front sheet. The adhesive is water repellent and has adequate set strength to support the mirror but has sufficient shear tolerance to permit the differential expansion of the mirror and the front sheet without inducing stresses or currature effect. The adhesive also serves to dampen fluttering of the mirror and to protect the mirror backside against the adverse effects of weather. Also disclosed are specific details of the preferred embodiment.

Abstract: What is disclosed is a water heating system characterized by a remote hot water storage tank having water interconnections with a heat pump unit and a remote, timed water circulating pump and water circuit incorporating temperature sensor and thermostat. The heat pump unit is adapted to be employed at a location near a kitchen or laundry room and includes conventional constituents such as compressor, condenser, expansion device, and evaporator connected in a closed refrigerant circuit; blower for circulating air from conditioned space across the evaporator; and pump for circulating water past the hot refrigerant gas in the condenser. The condenser comprises a double-walled heat exchanger for preventing contamination between the respective fluids. The heat pump unit comprises a cabinet housing the same and having a warm air inlet adjacent its bottom and cool air outlet adjacent its top.

Abstract: A method for affixing a dental appliance to teeth characterized by effecting a layer of bonding resin and catalyst on the teeth, effecting a layer of a substantially uniform admixture of only two reactants of a three-reactant system, the two reactants including the bonding resin and one of the other reactants, on the teeth; effecting a second layer of a substantially uniform admixture of a second two reactants of said three reactant system, said second two reactants including the bonding resin and the other of the reactants, on the dental appliance to be affixed to the teeth; positioning the portion of the dental appliance adjacent the teeth with the bonding resin, catalyst, and initiator in situ to effect polymerization and bonding on the surface of each of the teeth. After a predetermined cure time, the remainder of the dental appliance is affixed.