Abstract: A non-symmetrical construction of braided mechanical compression packing which includes warp yarns removed from the inner corners to prevent "popping" of these yarns during manufacture or when the packing is wrapped about a shaft. Additionally, a number of embodiments involving interior space filled with varying numbers of warp yarns at different positions produce an optimal warp density gradient in the finished braid, such that the braid has a more regular trapezoidal cross-section prior to being wound about a shaft, with the higher density occurring at the outside of the packing and tapered in density toward the inside of the packing. This non-symmetry of construction results in longer packing life and reduced shaft wear when used to prevent leakage about rotating shafts.

Abstract: Apparatus is provided for adapting an analog depth sounder for the calling out of the depth at regular time intervals. In one embodiment, a self-contained adapter module is mounted to the face of the depth sounder so as to cover the depth sounder display, with the module including a transparent plate carrying a detector array and with electronics and speaker carried at the center of the array. In this embodiment, the detectors are arranged in thin radially extending lines to permit accommodation to displays of different diameter. Alternatively, small detectors are arranged along a circle having a diameter which overlies at least a portion of the orbiting radiating element which radiates along a considerable length. This alternative array configuration also accommodates a range of display diameters. As a further alternative, to accommodate different diameter displays, the thin line detectors may be replaced with radially extending light pipes with detectors at their ends.

Abstract: The heel of the shoe, sneaker or other footwear is provided with a Velcro patch at the heel, with the Velcro patch having a cut-out window to accommodate an identification tag, label or health information card, with the label in the cut-out and the Velcro attached to the heel of the shoe being overlain with a releasably-attached flap having Velcro which mates with the shoe-mounted Velcro to form a fluid tight seal about the tag or indicia-carrying label, the heel mounting and the Velcro seal preventing the tag from coming loose from the shoe due to the interaction of the Velcro parts and due to the fact that the heel provides the least flexible area and the least wear receiving area for the shoe. The identity of the individual and other information on the tag is obtained from lifting the flap.

Abstract: An oscilloscope having multiple controls, wherein control functions are selected from a plurality of functions. Controls are located adjacent to the oscilloscope display which indicate the control parameter label and control parameter values. The control parameter selection is implemented by software program control.

Abstract: A wall hanger is disclosed in which a bow tie arrangement having porous end portions is mounted on the back of a picture to be hung on a wall. The bow tie is made to adhere to the back of the picture by the penetration of adhesive through the porous end portions, thereby to give strength to the hanging system. In one embodiment the adhesive is applied through the porous end portion and onto the picture backing, with the adhesive applied separately. In another embodiment, a bow tie type hanger is made of preformed and stretched nylon. In a still further embodiment, the hanger includes two separated pad portions with a flexible member between the pad portions in which the flexible member is offset from the plane of the pads to permit engagement of a hook when the hanger is adhesively attached to the back of a picture.

Abstract: A method of adapting a miniature standard coaxial connector to enable the coupling of a fiber optic cable to an active device is disclosed in which the female portion of the connector is partially disassembled by removing its central contact and modified by drilling out or otherwise enlarging the passage which is left after the removal of the contact. The active device is mounted through a hole drilled in a printed circuit board, and electrically coupled to the top layer thereof. This unit is then affixed to the end of the female connector carrying the enlarged passage, such that the metalized layer on the printed circuit board makes electrical contact with the metal casing of the female portion of the connector, and such that the face of the active element is exposed through the enlarged passage.

Abstract: A unitary double-halved shipping container is provided with a wheel well, and detachable arms and wheel assembly to convert the container into a wheelbarrow configuration. This permits ease of handling and maneuvering at low cost in view of the quickly detachable arms and wheel assembly. Integral slots are provided in the container body which accommodate the prongs of a conventional fork lift truck should movement of a number of containers be desired or should the distance of movement be such as to be more conveniently done by fork lift machinery. The halves of the containers are nestable and the slots accommodate securing or shipping straps. The wheel assembly includes a U-shaped spring member, the ends of which are brought together for ease of insertion and release of the wheel. The U-shaped spring member is also provided with a number of outwardly projecting sharp protrusions to secure the wheel assembly to the container when the ends of the U-shaped member are released.

Abstract: A solar energy conversion system is provided which includes a black body receiver for transferring energy from focused solar radiation to a circulating gas. The receiver includes a honeycomb heat exchanger located within a chamber sealed with impingement cooled windows, the outermost one of which acts as a one way trap or diode to prevent energy radiated by the heated honeycomb from escaping to the atmosphere. The heat exchanger is formed with a number of tubes which are oriented to be illuminated "end on" for minimizing retroreflection of the incoming energy. Because of the "end on" orientation, a large majority of the incoming energy impinges on the internal walls of the tubes and is internally reflected until it is absorbed. Cool gas, which may be air, is introduced into the receiver under pressure such that the gas passes through the tubes of the heat exchanger where it is heated to temperatures that are typically in the vicinity of 1700.degree. F.

Abstract: An improved long-life design for solar energy receivers provides for greatly reduced thermally induced stress and permits the utilization of less expensive heat exchanger materials while maintaining receiver efficiencies in excess of 85% without undue expenditure of energy to circulate the working fluid. In one embodiment, the flow index for the receiver is first set as close as practical to a value such that the Graetz number yields the optimal heat transfer coefficient per unit of pumping energy, in this case, 6. The convective index for the receiver is then set as closely as practical to two times the flow index so as to obtain optimal efficiency per unit mass of material.

Abstract: A method and apparatus are provided for increasing the heat transfer efficiency of a heat exchanger by utilizing a high intensity RF field. Either an ion stream generated by the RF field or the RF field itself results in the efficiency increase and the rate at which the fluid acquires energy from the heat exchanger is enhanced to the extent that the boundary layer normally present at the walls of the heat exchanger which impedes the transfer of heat from the heat exchanger to the fluid breaks down during this process. The RF technique is utilized in one unique application for increasing the efficiency of solar energy receiver which operate at temperatures exceeding 1,500.degree. F in that the system eliminates arcing which would occur due to the high temperatures involved, if electrostatic (D.C.) ion spray devices were used.

Abstract: A shielded passageway for use between electromagnetic interference shielded shelters includes two or more rigid telescoping members in a loose fit with EMI shielding material between the overlapping sections. In one embodiment a truncated toroidally-shaped rolling diaphragm shield of wire mesh is interposed between the overlapping sections to permit relative movement therebetween while maintaining or providing EMI shielding. In another embodiment the passageway is provided with an articulated stable walkway attached at either end to respective passageway sections for permitting relative movement between the overlapped passageway sections.

Abstract: A capacitor matrix correlator is provided for correlating two or more periodic signals in which a passive correlator is provided with a summing circuit implemented on the same printed circuit board utilized to form the capacitor correlator matrix. The capacitor correlator matrix and summing circuit are manufactured through the use of face to face printed circuit boards having overlying sections patterned and registered so as to form the capacitive elements, thereby simplifying the manufacture of the capacitive correlator and summing circuits.

Abstract: A sensitive, noise-free ellipsometer measures depolarization of an incident beam by forming from the reference and signal components of the incident beam a signal component polarized in one direction, and a frequency shifted local oscillator component polarized in the same direction, with these latter components being optically heterodyned at a detector. In the formation of the local oscillator component, the reference component of the incident beam is shifted in frequency from that of the signal component of the incident beam and rotated 90.degree. from its original orientation so that optical heterodyning can take place. This is accomplished by passing the incident beam through a shear-wave, traveling wave acoustic modulator which forms local oscillator and signal beams, each having rotated and frequency shifted components, and unrotated and unshifted components.

Abstract: A number of subsystems are disclosed for use in pagers in which the message transmitted, received and displayed is in alpha/numeric form. The subsystems include an encoder which displays the encoded message on an imprinted tape which is run continuously as an alarm when the memory of the encoder is overloaded. In a soft copy embodiment the encoder includes a keyboard and a dot matrix form of display both driven by a single logic circuit which cycles sequentially through all the alpha/numeric characters to provide simultaneously keyboard decoding and display activation. In another subsystem an end of message circuit is provided to sense the absence of transmitted characters by integration of the message signals, with a nonzero average indicating the end of the message. In a further subsystem, when FSK message signals are used, only one of the two tones is detected for message decoding.

Abstract: A method and apparatus for controlling the runout and initial recoil velocity of an artillery piece is disclosed in which variables of barrel elevation and the impulse delivered by a round of ammunition are hydraulically sensed as pressures trapped in actuators which control the flow of fluid to the recoil cylinders of the artillery piece. The system provides for a predetermined constant deceleration of the recoiling barrel assembly regardless of the type or power of the round utilized. When a constant predetermined deceleration is provided, the recoil velocity is uniquely determined and an automatic system is provided for assuring that the loading of the artillery piece always takes place at the same instant of time and that the barrel assembly will have decelerated sufficiently to prevent damage to the snubbing apparatus carried by the artillery piece.

Abstract: Pulse stretching and smearing due to forward scatter of a collimated beam from a light source is eliminated by the use of a multiple field of view detector which divides up the beam in the vicinity of the receiver into segments along the optical path of the beam, inverts the order of the signals from the segments, and delays the signals by predetermined amounts such that pulses from different segments overlap and add, with the delay set to compensate for different path lengths between the transmitter and the receiver due to the intercepting of various segments along the optical path by the fields of view of the individual detectors making up the multiple field of view receiver.

Abstract: A method and apparatus for testing and evaluating the runout and recoil control systems for a gun in which a body having a mass representative of the mass of the moving parts of the gun is accelerated under the control of the runout system under test and then decelerated under the control of the recoil control system under test. During both acceleration and deceleration various conditions such as the position and velocity of the body are measured and recorded.

Abstract: An address tone decoder is disclosed for detecting a predetermined address tone code and for activating remaining pager circuitry upon receipt of the appropriate address tone sequence in which the detection of tones of the appropriate frequencies starts normally-off timing circuits. The signal from the timing circuit associated with the first tone is effectively elongated to coincide with the signal from the timing circuit associated with the second tone in the sequence. A cross inhibiting circuit provides shock protection by resetting the timing circuit associated with one tone when another tone is simultaneously present. A group call timer is included which provides an activation signal responsive to an elongated first tone.

Abstract: A soldered joint between a thin flat conductive lead and a flat conductive pad in which the lead is "rippled," that is, formed with undulations each of which engages the surface of the pad so that during soldering, the molten solder fills the spaces between the pad and the lead and then solidifies forming the soldered joint.

Abstract: A fluid .[.Flow Restrictor.]. .Iadd.flow restrictor .Iaddend.especially suitable for reducing the pressure of gases or liquids is described. The restrictor comprises a series of rows of baffles placed in the path of fluid flow, with the baffles in succeeding rows staggered with respect to those in adjacent rows so that as the fluid flows, it is constrained to change its direction repeatedly. The restrictor is preferably constructed with an increasing cross sectional area along the direction of flow. One suitable physical construction comprises a plurality of thin circular plates with a central bore, arranged in a stack. Each plate has a baffle pattern formed on one or both sides, for example, by etching. Fluid flow is from the central bore, between adjacent plates, to the circumference of the stack.