Abstract: A flashlight having a reinforced tubular plastic casing including a battery compartment and a bulb compartment separated by a transverse wall integrally molded with the casing. A bulb is retained in a socket integrally molded with the wall by a bushing which may be quickly connected and disconnected from the socket, the bulb and the bushing being resiliently axially moveable with respect to the socket and the transverse wall to prevent breakage of the bulb due to shock or impact. A novel reflector is axially moveable with respect to the bulb to afford adjustable focussing of the light emitted from the bulb. The reflective surface of the reflector combines a facetted parabolic surface on the outer portion of the reflector with a smooth spherical surface at the base of the reflector to optimize the amount of light collected from the light bulb and focused in the beam.

Abstract: A light emitting module is attached to one of a pair of separable U-shaped metal clamps that can fit around a weapon trigger guard. The clamps have recesses for retaining elastomeric inserts which contact the trigger guard. The inserts are of inexpensive glass-filled molded plastic rather than machined steel so that a greater variety can be provided at low cost and little value is lost by discarding those not needed for a particular weapon. The greater variety provides a better fit with little or no custom shaping and the elastomeric inserts are much easier to shape if an unusually contoured trigger guard is encountered. A slide switch passes through the clamp and is actuated by either a right or left handed user. The motion of the switch is transverse to the trigger guard and firing direction of the gun.

Abstract: A fastener has a head portion with a torque accepting surface and a cylindrical recess on an external surface thereof defining a pair of axially spaced annular shoulders for acceptance in a circular fastener accepting aperture in a connector component. The aperture has a counterbore for the acceptance and seating of the head portion of the fastener and a channel extending radially of a longitudinal axis of the aperture therein for the acceptance of the fastener in translation, the channel having parallel shoulders spaced slightly greater than the diameter of the cylindrical recess in the head portion of the fastener but less than the minimum diameter of at least one of the shoulders thereon.

Abstract: A light emitting module is attached to one of a pair of separable U-shaped metal clamps that can fit around a weapon trigger guard. The clamps have recesses for retaining elastomeric inserts which contact the trigger guard. The inserts are of inexpensive glass-filled molded plastic rather than machined steel so that a greater variety can be provided at low cost and little value is lost by discarding those not needed for a particular weapon. The greater variety provides a better fit with little or no custom shaping and the elastomeric inserts are much easier to shape if an unusually contoured trigger guard is encountered. The electrical cord running to the on/off switch for the module emerges from the module in fixed relationship to the clamps and need not be removed to change the module batteries. A trigger guard mountable laser sight that is more resistant to shock and requires less ongoing adjustment to maintain light beam and boresight coincidence is obtained.

Abstract: An internally mounted light beam sight suitable for use in automatic pistols and other weapons is provided by replacing the conventional recoil spring guide rod with a hollow tube having substantially the same exterior shape and dimensions, but containing a laser beam generation module within its hollow bore. A collar surrounds the module near a first end. The collar has a part-spherical outer surface which engages a matching-spherical inner surface within the tube so that the angular orientation of the module may be adjusted by relative rotation of the two part-spherical surfaces. The collar is desirably split by one cut-through so that it may be spread apart to slip over an end of the module. The module and collar have an interlocking groove and ridge which retains the collar in place on the module. Transverse adjustment screws in the tube bear on a distal end of the module so that the angular orientation of the module may be varied with respect to the tube.

Abstract: A floating escutcheon prevents contact damage during mating and unmating of pin and socket connectors and comprises a hollow member slidably supported relative to one of the connectors and having a central aperture for the acceptance of the other connector in telescoping relationship only when the angle between a central axes of the pins and sockets is less than a predetermined angle.

Abstract: A bulk material mixing apparatus has an inclined drum rotatably mounted on a frame supporting a hopper for directing bulk materials in the drum. An auger extended along a trough conveys materials toward the upper inlet end of the drum into a discharge chute or back into the drum. An elongated bar positioned above the auger provides an even distribution and flow rate of materials into the auger trough. A hydraulic motor drives the auger connected to a planetary gear drive used to rotate the drum whereby the motor concurrently drives the auger and drum to mix bulk materials placed in the drum. A hopper attachment having a feed auger is adapted to be mounted on the hopper to handle large amount of bulk material.

Abstract: A hydraulic cement is formed from a Class C fly ash, an alkali metal activator, and citric acid. Mortar and concrete compositions can be prepared with this hydraulic cement. The cement is particularly useful in producing mortar and concrete compositions that achieve high strengths in a short time, in particular, a mortar having a strength of at least 2500 psi in 24 hours, when cured at room temperature.

Abstract: A pipeline casing insulator to support a coated pipe within a tubular, metallic casing. The pipeline casing insulator comprises a flexible belt formed of a material that is capable of bonding to an organic resin. A plurality of parallel bar-like runners are formed from an insulative and non-abrasive polymer concrete that is cast onto an outer facing surface of the belt. The belt is preferably a strip of an organic non-woven material. The polymer concrete is preferably a mixture of a thermosetting polymer resin, such as epoxy, polyester or polyurethane, and an aggregate. The aggregate preferably comprises a mixture of substantially incompressible coarse particulate material, such as sand or gravel, and fine filler material, such as calcium carbonate, silica flour, or kaolin. The inner facing surface of the belt preferably has a mastic coating covered by a release paper that can be removed, to allow attachment of the belt to the outer surface of the pipe by circumferentially wrapping the belt around the pipe.

Abstract: A binder composition for Portland cement is disclosed, said composition including 100 parts by weight metakaolin and, based upon said metakaolin, from 20 to 70 parts by weight slag; from 85 to 130 parts by weight of at least 1 material selected from the class consisting of fly ash, calcined shale, and calcined clay; from 70 to 215 parts by weight finely divided silica, preferably amorphous silica; and from 55 to 145 parts by weight of a mixture of potassium silicate and potassium hydroxide, wherein at least 55 parts by weight is potassium silicate. The binder composition can be mixed with Portland cement or with a combination of Portland cement and fly ash to provide a composition curable to a material having a high early strength and a high ultimate strength.

Abstract: A dry, mineral binder composition is disclosed having from 6 to 25 parts by weight metakaolin, 3 to 30 parts by weight dry potassium hydroxide, 0 to 18 parts by weight slag, 0 to 60 parts by weight of a material selected from the class consisting of fly ash, calcined shale, and calcined clay, and from 1 to 150 parts, by weight, of a finely divided silica, preferably an amorphous silica. The binder is particularly useful in combination with Portland cement for forming concrete compositions.

Abstract: A thrust rod anchor for utilization in conjunction with a tied form of pipe joint restrainer system. The anchor utilizes spacers which are supported by flanges at their outer extremities and are bolted together over a pipe. A pipe engaging support is provided in conjunction with the outwardly disposed portions of the spacers in a manner wherein a rigid structural support is located adjacent to the surface of the pipe which serves to support and carry symmetrically disposed pipe engaging set screws. Thrust rods are connected to the assembly intermediate outwardly disposed connecting bolts and the set screws. The anchor assemblies of the invention have been shown to provide substantially enhanced anchoring resistance to thrust forces.

Abstract: A paper-lined dry cell battery includes an electrically insulating band over the full circumference of the inner surface of the can sidewall from a point below the level of the upper end of the liner to a point substantially thereabove, thereby to electrically insulate a segment of the can sidewall from smears.

Abstract: The switch includes a slide, mounted for movement along the housing between first, second and third positions, and carrying a depressable pushbutton. A flexible contact is movable by the pushbutton to a position wherein it is operatively connected to a fixed contact to complete the electrical circuit. The pushbutton and the flexible contact each have corresponding camming and non-camming surfaces thereon which respectively interact to move the flexible contact towards the fixed contact. The corresponding camming surfaces interact only as the slide is moved from the second to the third position. The corresponding non-camming surfaces interact only when aligned and the pushbutton is depressed. Since none of the surfaces operatively interact as the slide is moved from the first toward the second position, wearing of the interacting surfaces is substantially reduced.

Abstract: A gravity assisted feeder is disclosed for feeding flowable solids by means of a rotating blade disposed below a stationary cone. Rotation of the blade causes the solids to move inwardly along the blade to a discharge port adjacent the axis of rotation of the blade.