Abstract: A seismic brace for fastening to a support rod at one end and a structural portion of a building, on the other end. The brace is attachable to the support rod without disconnecting it. The brace arm part is bent at an angle of 45° to form a base bracket that connects to the support rod. A locking bracket is hinged to the brace arm to overlay the base bracket. Both the base bracket and locking bracket have a slot extending from an edge towards the middle, the slots are arranged so that they form an aperture when the locking bracket overlays the base bracket part of the brace arm to completely enclose the support rod.

Abstract: A seismic brace having a brace arm for fastening to a support rod on one end and a structural portion of a building, on the other end, is attachable to the support rod without disconnecting it by a base bracket hinged to the brace arm and a locking bracket hinged to the brace arm or the base bracket to overlay the base bracket. Both the base bracket and locking bracket have a slot extending from an edge towards the middle with one slot offset form the other by ninety degrees (90°). The base bracket is bent at an angle of 45° from the horizontal which provides extra strength and resistance to lifting from the horizontal according to I.C.B.O. tests. The locking bracket has a conforming bend.

Abstract: An internally threaded insert anchor for use in poured concrete floors having a metal decking or a wood form is described which provides stability against skewing or misalignment due to rough action after being inserted into the metal deck or wood form, prior to the concrete being poured. Once locked into the concrete floor, the threaded insert anchor provides easy attachment for the support rods that carry the racks of utility, piping and ceiling grid systems for the building. Each threaded insert anchor is capable of accepting two different size rods or bolts with different thread cuts. The internal threaded apertures are protected from concrete intrusion during the pour by the plastic or metal sleeve. Moreover, the anchors are designed so that subsequent spraying of the ceiling with fire retardant or insulation foam will not penetrate into the threaded apertures, so as to prevent subsequent entry of the support rods.

Abstract: A seismic brace having a brace arm for fastening to a support rod on one end and a structural portion of a building, on the other end, is attachable to the support rod without disconnecting it by a base bracket hinged to the brace arm and a locking bracket hinged to the brace arm or the base bracket to overlay the base bracket. Both the base bracket and locking bracket have a slot extending from an edge towards the middle with one slot offset form the other by ninety degrees (90.degree.).

Abstract: A driver for securing pre-wired threaded fasteners to the ceiling of a building structure includes a driver head, a pre-wired fastener held by the driver head, and a telescoping pole connected to the driver head. The driver head is a solid, cylindrical rod or shaft having a kerf opening through the top of the shaft and extending axially therefrom, the kerf extending either partially or completely across the diameter of the shaft. The kerf includes a tapered recess opening axially through one sidewall of the shaft. A blind recess shaped to receive the flat head of a threaded fastener also opens through the top of the shaft and intersects the kerf substantially orthogonally. The threaded fastener is pre-wired with a wire which has a closed loop at one end, the loop being off-set from the major lineal direction of the wire. When the head of the threaded fastener is fit into the blind recess, the wrap of the wire is loosely constrained against lateral motion by the tapered recess.

Abstract: This invention relates to an impact actuated tool for driving a fastener by an explosive charge, particularly a tool having a housing with a barrel axially slidably mounted within the front end. A nosepiece is fixed to the front of the barrel with a muzzle at its front end for receiving a fastening element that is to be secured in a ceiling, wall or the like. A piston is slidably mounted within the bore in the barrel. The barrel is biased forwardly in the firing direction. At the rear of the tool a handle engages a firing pin which is slidably mounted within the rear end of the bore. The firing pin is biased rearwardly towards the back end of the tool. One embodiment of the tool includes a ball lock safety device to allow discharge only when the muzzle of the tool is pointed in an upward direction. The tool is fired by impacting the nosepiece against a surface to effect displacement of the barrel and firing pin against their respective biasing springs.

Abstract: This invention relates to an impact actuated tool for driving a fastener by an explosive charge, particularly a tool having a housing with a barrel axially slidably mounted within the front end. A nosepiece is fixed to the front of the barrel with a muzzle at its front end for receiving a fastening element that is to be secured in a ceiling, wall or the like. A piston is slidably mounted within the bore in the barrel. The barrel is biased forwardly in the firing direction. At the rear of the tool a handle engages a firing pin which is slidably mounted within the rear end of the bore. The firing pin is biased rearwardly towards the back end of the tool. One embodiment of the tool includes a ball lock safety device to allow discharge only when the muzzle of the tool is pointed in an upward direction. The tool is fired by impacting the nosepiece against a surface to effect displacement of the barrel and firing pin against their respective biasing springs.

Abstract: This invention relates to an impact actuated tool for driving a fastener by an explosive charge, particularly a tool having a housing with a barrel axially slidably mounted within the front end. A nosepiece is fixed to the front of the barrel with a muzzle at its front end for receiving a fastening element that is to be secured in a ceiling or the like. A piston is slidably mounted within the bore in the barrel. The barrel is biased forwardly in the firing direction. At the rear of the tool a handle engages a firing pin which is slidably mounted within the rear end of the bore. The firing pin is biased rearwardly towards the back end of the tool. One embodiment of the tool includes a ball lock safety device to allow discharge only when the muzzle of the tool is pointed in an upward direction. The tool is fired by impacting the nosepiece against a surface to effect displacement of the barrel and firing pin against their respective biasing springs.

Abstract: This invention relates to an impact actuated tool for driving a fastener by an explosive charge, particularly a tool having a housing with a barrel axially slidably mounted within the front end. A nosepiece is fixed to the front of the barrel with a muzzle at its front end for receiving a fastening element that is to be secured in a ceiling, wall or the like. A piston is slidably mounted within the bore in the barrel. The barrel is biased forwardly in the firing direction. At the rear of the tool a handle engages a firing pin which is slidably mounted within the rear end of the bore. The firing pin is biased rearwardly towards the back end of the tool. One embodiment of the tool includes a ball lock safety device to allow discharge only when the muzzle of the tool is pointed in an upward direction. The tool is fired by impacting the nosepiece against a surface to effect displacement of the barrel and firing pin against their respective biasing elements.

Abstract: An orthodontic appliance includes a bracket having a front face provided with a rectangular recess for receiving an archwire and rear face for attachment to a tooth or backing plate with an intermediate segment defining a peripheral groove having a pair of base surfaces which are curved about a common axis for receiving supplemental or primary archwires; the body is provided with a rear segment including a through channel for receiving a retaining pin which has a head for cooperation with a notch formed in the front face; the recess of the front face is angled in two directions to increase the variability of the forces that can be applied to the subjacent tooth in practice.

Abstract: There is described an improved alcohol free mouthwash comprising sodium chloride, sodium bicarbonate and water.

Abstract: In a weapon boresighting system for aircraft and other vehicles a pair of spaced apart, collimated laser beams oriented to a fixed reference line on the vehicle are transmitted to a receiver positioned at the weapon or other module to be boresighted, the receiver having a first section including a position sensitive cell for measuring pitch and yaw relative to a pitch and yaw reference surface and a second section including a position sensitive cell for measuring roll relative to a roll reference surface.

Abstract: In a weapon boresighting system for aircraft and vehicles, an optical square is oriented to a fixed reference line on the vehicle and provides the directionality of a pair of orthogonally positioned of laser illuminated retroreflective catadioptric collimators attached to said optical square whose outputs are directed via one or more deviators or periscopes to a pair of retroreflective catadioptric receivers orthogonally attached to a second optical square positioned at the weapon to be boresighted, each said receiver imaging the laser on a position sensitive sensor, the outputs of the latter indicating the pitch roll and yaw condition at the weapon.

Abstract: A portable, self-contained, rechargeable battery power source provides a plurality of voltage levels to a load circuit, thus allowing one source to replace the need for many batteries. The battery is a high-capacity unit of the type used in camcorders and enables increased playing time for each battery period of charge.

Abstract: A signal termination device is illustrated using planar circuit technology for providing both broadband capabilities from DC to over ten gigahertz while maintaining small size and high power dissipation capabilities. This is accomplished by plating a series cascade of resistors and transmission lines such that the sum of the resistors is equal to the desired termination impedance and the impedance of the interconnecting transmission lines is equal to the sum of the remaining resistors between that point and ground. The use of the intervening transmission lines enhances the power handling capability of the resistor elements and enhances uniform power densities in the resistor elements.

Abstract: A second or third-order phase-locked loop with higher loop gain at medium and low frequencies, while avoiding the problem of amplifier saturation caused by high amplifier gain combined with the DC offset of imperfect phase detectors, includes a voltage controlled oscillator and a phase detector for comparing the phase of the reference oscillator and the VCO. In a third-order embodiment, two operational amplifiers are connected in series between the output of the phase detector and the input to the VCO, each amplifier having an associated feedback circuit including a series capacitor and a resistor to provide gain shaping. A Tee circuit is provided from the output of one of the amplifiers to the input of the other, and includes a shunt-connected capacitor to provide low frequency sensitive feedback to reduce the gain of the amplifiers at frequencies approaching DC, thereby preventing saturation and enabling increased loop gain at frequencies thereabove.

Abstract: A third order phase-locked loop providing increased gain in the high frequency portion of a predefined bandwidth includes an oscillator providing a reference signal, a voltage controlled oscillator (VCO) providing a variable signal, and a phase detector for comparing the phase of the reference signal to the phase of the variable signal. The phase detector produces a difference signal for application to an input of the VCO to bring the variable signal into phase with the reference signal. First and second active amplifiers are connected in series between the output of the phase detector and the input to the VCO, operative to provide decreasing loop gain with increasing frequency at the rate of 18 db per octave at frequencies approaching the predefined bandwidth.

Abstract: An alarm circuit operatively associated with a phase-locked loop provides an error indication when the phases of the referenced signal and voltage controlled oscillator signal lose synchronization for times less than one millisecond. The alarm circuit includes an amplifier connected to receive the phase detector error signal, and an impedance connected to conduct the phase detector error signal to the amplifier. The impedance and amplifier have a frequency response corresponding to a frequency response of an associated receiver circuit, so that short duration deviations in the reference signal frequency which the receiver circuit cannot track produce an error indication and long duration deviations which can be tracked by the receiver circuit do not produce an error indication.

Abstract: A reactor system for continuously effecting the hydrolysis of cellulosic materials, as relatively concentrated aqueous mixtures, comprises a tubular reactor, a high solids pump, steam injecting means, a discharge valve controlled by pressure-responsive means, and means for collecting and recovering the reaction products from the hydrolyzate. The high-solids pump apparatus utilizes a valve having a flow distributing passageway of arcuate, uniform circular cross-section. The various portions of the apparatus are constructed with uniform internal dimensions and configurations, so as to avoid any constriction to flow of the material therethrough, thus minimizing the tendency for blockages to occur therewithin. The loading mechanisms are unloaded alternatingly by a reciprocating ram, so as to substantially continuously feed material through the associated valve.

Abstract: A continuous process for effecting the acid hydrolysis of cellulosic waste materials, at high solids and in a most economically desirable manner. The process may be controlled to produce, as primary products, glucose, furfural and/or xylose. By appropriate control of water and temperature, through the use of direct steam injection, high solids feedstocks may quickly be converted, in good yields, to valuable products, thus making the process very attractive from a practical commercial standpoint.