Abstract: Method and apparatus for use in measuring SAR (Specific Absorption Rate) of persons subject to RF (radio frequency) radiation utilizes twin well calorimetry including first and second gradient-layer type calorimetry boxes the thermally conductive walls and cover of which contain a multiplicity of thermocouples the outputs of which are differentially amplified to provide a differential output. Identical body models that are thermally responsive to RF radiation are contained in the box wells and, after a period of thermal equalization outside the influence of the RF source, one body model is removed from its well and placed in the influence of the radiation in question while the other remains outside the influence. After a predetermined time period the irradiated model is returned to its well and the differential outputs is plotted over a time period. The area under the resultant curve is representative of total absorption from which can readily be calculated SAR.

Abstract: A swimmer distress signal of the smoke or flare type has an ignition system hich can be operated with one hand. A stab primer is activated by a sliding firing pin that is normally locked in position and protected by a metal cover. Upon withdrawal of the signal from a pouch, a lanyard pulls off the cover to expose and unlock the firing pin which has an enlarged head. A hit or force on the firing pin head drives it into the primer to ignite the display.

Abstract: An intershaft seal device between inner and outer coaxial shafts of a mulle spool turbine is characterized by a primary seal ring and carrier assembly that is keyed for rotation with, and axial movement relative to, the outer shaft with the primary seal ring running between races mounted on the inner shaft. A secondary seal ring is disposed between a cylindrical portion of the primary seal ring carrier and a tubular flange extending coaxially from the outer shaft and effects a balance of axial forces resulting from pressure zones separated by the seal device.

Abstract: A method for manufacturing bladed disks, or blisks, for turbines by press welding of blades or outer airfoil elements to blade stives or inner airfoil elements on a disk is characterized by the provision on the outer and inner airfoil elements of flanges of excess flash material having alignment holes for dowel pins that assure alignment of leading and trailing edges of the airfoil elements during pressure welding, followed by removal of the excess flash material and the included dowel pins.

Abstract: An externally mounted fire or explosion suppressing device for aircraft f tanks includes a bottle of pressurized fluid suppressant agent, the bottle having a primary duct ending in a seal disposed against the exterior surface of a tank wall. A secondary duct is disposed at an angle to the primary duct and carries a pyrotechnic charge that is detonated in response to an optically detected flash in the tank and explosively cuts through the seal and tank wall to release suppressant into the tank.

Abstract: An apparatus and method for rewarming hypothermia victims utilizes mutually nductive first and second helical coils supported in spaced relation around a subject's torso, the combination of coils and subject having a resonant frequency in the 2 MHz to 20 MHz radio frequency range. An automatic tuner couples an RF generator to energize the coils at the resonant frequency. A portable version utilizes flexible coils on an insulating and spacing jacket having a zippered opening with conductive teeth to complete coil turns.

Abstract: A bomb to bombrack attachment lug assembly engages in a keyhold slot of a actice bomb casing and includes a metal lug element and a plastic locator element that centers and releasably locks the assembly in the keyhold slot. The lug element has an eye portion, a stem and arms extending laterally from the stem, while the locator element includes a cylindrical body snapped onto the stem and arms and has laterally extending ears having retaining bosses that engage the slot.

Abstract: A reconfigurable, automatic test equipment system having a controller conted by a system bus to a plurality of IEEE-488 based instrument resource stations is characterized by automatic initialization capability including automatic address searching. Automatically initializable resource stations each include an initializing circuit cooperable with the controller and respective resource to zero in on successive characters of a unique identifier for each resource.

Abstract: A device for clamping a marker to a mine mooring cable upon severing by a tter utilizes a V-shaped body having a liner that is explosively deformed into clamping engagement with the cable in response to cutter actuation. A smoke flare is included and ignited to provide a prolonged locating signal.

Abstract: A resistance monitoring solid state circuit distinguishes between a minimum high resistance condition and a maximum low resistance condition by current mode switching of a pair of transistors the switching control voltages of which are established by bias resistor networks forming legs of a bridge, with the monitored resistance in one leg, the transistors switching current flow into one or the other of two logic signal generating paths that include opto-isolators for electrical isolation from utilization circuitry.

Abstract: A multi-engine helicopter fuel supply balance system effects automatic trfer of fuel from a larger tank to a smaller tank in response to low fuel level in the smaller tank when in automatic mode, and effects a transfer of a predetermined quantity of fuel between selected tanks by timed operation of a constant delivery pump when in manual mode.

Abstract: A binary digital data link includes a differential transmitter, a shielded wire pair transmission line, and a receiver having electro-optic isolation utilizes input logic transistorized switching to control current flow direction in the wire pair, the receiver being responsive thereto to provide electrically isolated binary data output.

Abstract: A quick-disconnect device for coupling segments of a diver's umbilical ho includes separable rectangular bodies carrying complementary hose couplings spaced therealong. The bodies, which have nested rim and reduced portions, are biased toward separation by a rectangular, flat-type spring and releasable retained against separation by a retractable retaining pin extending diagonally therethrough and normally locked against retraction by partial rotation.

Abstract: A four-ported dump combustor is designed for use with a ramjet engine and ovides high combustion efficiency and pressure recovery for length-to-diameter (L/D) ratios of between 1.3 and 4.4, over a range of operating conditions.

Abstract: An improved safety mooring line of the type having an inner high stretch ety line and an outer high strength, low elongate synthetic fiber strength member also has an armor layer of a high strength, heat resistant synthetic fiber material braided over the safety line underneath the strength member. The armor layer is braided with a high braid angle so that it can elongate when the strength member parts, yet insulate the safety line from the heat and flailing ends of the strength member resulting from the released energy of parting.

Abstract: A hand pump that is operable selectively as a large volume low pressure air ump or a smaller volume higher pressure pump has a small diameter cylinder reciprocable in a large diameter cylinder and carrying a large diameter plunger and a small diameter plunger reciprocable in the small diameter cylinder. Wire bail type latches are operable to select the mode of pump operation upon reciprocation of the pump handle.

Abstract: A water excluding vent valve for insulated gloves or other portions of a er's dry suit utilizes a vent control element including a microporous membrane disposed in obturating relation to an opening in the shell of the glove or other article. The membrane is laminated between protective layers of woven synthetic fabric, and a retaining means permitting replacement of the control element is described.

Abstract: A closed loop system for communication of binary data utilizes master or a sources and slave or data sink stations, each including a transmit buffer, a three-state transmitter, a receiver, a comparator, a three-state receiver, a receive buffer, a timer, a filter and a local controller, with the transmitter of each station connected by a transmission path to the receiver of the other station. Binary data bits are separated by spaces and bits and spaces are transmitted singly from the source station, received and retransmitted back to the source station by the sink station, with each retransmitted bit or space being compared at the source station with its original transmission for verification before a succeeding bit or space is transmitted.

Abstract: A minesweeping cutter device includes a tubular body closed at one end and aving a cable engaging recess at the other end, a barrel member reciprocable in the body by cable engagement to fire a chisel propelling charge. The chisel has its cutting edge spaced from the cable until the charge is fired so that a reliable cutting velocity is achieved before impact. An erecting vane has a sweep wire channel and is provided with a sliding gate on a guide rail that diverges angularly from the axis of the channel.

Abstract: A flexible fluid coupling and electrical bonding device includes a sleeve elastomeric material and a wire mesh bonding strip having its central portion embedded between layers of the sleeve wall laminations, with extra length portions of the strip folded back within the sleeve either against or embedded in the inner surface of the sleeve so as to be clamped against and effect electrical bonding between metallic duct ends when joined by the device.