Abstract: A signal source in the form of a 60 Hertz voltage generator provides a 12 volt peak-to-peak signal to the primary winding of a transformer having a secondary winding which has an upper lead, a lower lead, a return lead which is between the upper and lower leads, and a tap lead between the lower lead and the return lead. The lower lead is connected through a variable resistance to the return lead. The movable arm of the variable resistance is connected to a first amplifier circuit, the output of which is applied to one of the horizontal deflection plates of an oscilloscope. The upper lead is connected through a 5 ohm resistor to ground and also to the input of a second amplifier circuit, the output of which is applied to one of the vertical deflection plates of the oscilloscope. The tap lead is connected to a first test lead, and the other test lead is connected to ground.

Abstract: A mounting for use in conjunction with a laser in an installation where the structure may be subjected to destructive shock. The structure includes an external rigid shell to contain the laser head and power supply panel. The shell encloses impact absorbing shock mounts or plates which serve to retain shock reduction cushions which surround the laser head and support it within the shell returning it to its appropriate position following shock. A shock absorbing bracket is provided to mount the entire unit in position.

Abstract: A portable self-contained apparatus for removing essentially all residual water from a surface including a primary source of energy driving an air pump. A reservoir and a filter mounted therein are located adjacent the air pump. Water is collected in the reservoir via a vacuum forced conduit where it is aerated and passed through the vacuum pump to be discharged at a point some distance from the location of the apparatus.

Abstract: A vacuum actuated guide and tension control system for use in a corrugated paperboard manufacturing plant or the like. The vacuum actuated guide includes a smooth paper contacting surface having a plurality of spaced openings through which a vacuum is imposed upon a sheet passing thereby. The guide, acting upon paper which is being unwound from a roll, or otherwise being operated upon during movement, urges the paper into frictional pressure contact with the perforated smooth surface. The tension placed upon the paper is controlled automatically by varying the amount of negative pressure to which the paper is subjected. In the event of a paper break or other unexpected happening, the operator can actuate a switch and instantaneously terminate the vacuum enabling an instant shutdown of the machine and correction of the problem.

Abstract: A conventional digital-to-analog converter (DAC) which has a plurality of input lines is modified by adding another input line below that of the original least significant bit position. The additional input line is connected internally of the DAC exactly like the original least significant bit line. External of the DAC, the input line connected to the most significant bit position of the DAC is a direct line, i.e. there are no additional elements in that input line. There is an inverter in the additional input line, while the intermediate input lines, which vary in number depending upon the length of the coded input, include EXCLUSIVE-NOR gates. A resistor sufficient in value to set the output of the DAC about zero is connected between the reference voltage input connection and the output connection of the DAC.

Abstract: A two-stage refrigeration system including a primary cooling circuit which may be of the mechanical, vapor-compression type and a secondary closed system which is limited to an evaporator, located in the product storage area, a condenser and the necessary interconnecting conduits. The two circuits are operatively linked by a heat exchanger located outside the product storage area. The heat exchanger serves as the evaporator of the primary, caustic refrigerant system, and as the condenser of the secondary, relatively safe, volatile refrigerant system. Means are provided to prevent the refrigerant of the primary circuit from entering the secondary circuit in the event of heat exchange leakage. The heat exchanger design as well as the primary circuit control permits a rapid response to changes in temperature in the product storage area without requirement of controls on the secondary side of the system.

Abstract: The electrode is circular in configuration, with a central opening, so that it has inner and outer rims. The electrode structure comprises a plurality of spiral-shaped vanes of conducting material which are separated by relatively thin slit-like openings. The spiral vanes begin at an inner boundary which is close to the inner rim of the electrode and rotate approximately one-half turn to the outer rim of the electrode. A portion of the electron beam, which is typically produced from a cathode energized by a high voltage source, strikes the electrode near the central opening, and travels along the vanes of the electrode to ground, thereby establishing a plurality of spiral current paths in the electrode. These spiral currents create a magnetic field about the center of the anode in the region of the electron beam, focusing the remainder of electron beam through the opening in the electrode.

Abstract: In one embodiment, the limb protector is a protective gaiter which extends from the wearer's instep to just below his knee. A portion of the gaiter forms a completely closed pocket which contains an energy absorbing pad. The pocket and the pad are both configured so that the pad fits over and protects the wearer's shinbones, as well as covering many of the major bones and muscles of the wearer's leg. In another embodiment, the limb protector is an arm guard which extends from the wearer's elbow to his wrist. The arm guard includes a tapered sleeve-like element which is sufficiently elastic that it bears tightly about the arm of a user. A pocket is provided in the sleeve-like element to receive a protective pad. Elastic means are provided at both ends of the sleeve-like element to assist in preventing circumferential and longitudinal movement of the protector, even with violent movement of the user's arm.

Abstract: A corner boom which includes a secondary water conduit is pivotally connected to the end of a center pivot boom which includes a primary water conduit and comprises a series of sections which pivot relative to one another about a center pivot point. The corner boom is supported by a wheeled tower which moves along a predefined path. A first encoder is positioned on the end of the center pivot boom to determine the angular separation between the corner boom and the end section of the center pivot boom. Other encoders are positioned, respectively, on a wheel of the support towers of both the end section and the next adjacent section of the center pivot boom to determine the angle between a reference line and a straight line connecting the center pivot point and the end of the center pivot boom.

Abstract: A machine for fluffing fiberglass insulation at a faster rate than heretofore possible, introducing an antistatic material and blowing the material to a point of installation a greater distance from the machine than heretofore possible. In addition to fluffing the insulation to assure the necessary insulative qualities, the fiberglass material must also be treated with an anti-static solution to make it capable of appropriate placement and to reduce the dust and flyaway prevalent with this type of operation.

Abstract: Constant volume, continuous external combustion rotary engine which incorporates at least one radial piston compressor, at least one continuous-combustion chamber, at least one radial piston expander together with a means to supply fuel to the combustion chamber. A novel arrangement of compressor and expander manifolding controls admission and discharge to and from the compressor and expander sections. Power output is realized when opposed expander pistons equipped with roller bearings react directly on the internal cam lobe surfaces of a stationary housing causing the cylinder block to rotate and drive the compressor piston inwardly or outwardly as their roller followers engage their cam tracks. As a fresh charge of compressed air is delivered to the hydrocarbon fueled combustion chamber, an equal amount of combustion product under almost equal pressure is withdrawn by the expander. When combustion charging is completed, both compressor and expander are momentarily disconnected from the combustion chamber.

Abstract: A wrench which includes an elongated shaft having a device at one end to receive a drive, such as a handle or the like, which drive usually is free to rotate on the elongated shaft, and a device at the other end to receive a socket or similar article. Alternatively, the other end may itself be configured in socket form or other tool, such as a phillips screwdriver head. The elongated shaft includes two swivel points along its length, permitting the tool to take various operating configurations, including straight through, an L form for high torque, and a lazy Z form for high speed.

Abstract: Rotary engine having a hollow, stationary block with manifolds for air inlet and exhaust valving and means for supplying fuel. The block supports one or more in-line cylinders which are provided with opposed pistons equipped with rigid and constrained piston rods. The rods carry bearings that run along a cam track surface interior to a disc, the outer surface of which is a right circular cylinder. The surrounding right circular cylinder rotates as a result of the linear movement of the opposed pistons thereby providing mechanical power. The cam surface is a continuous track which determines the out-put motion of the piston movement between top and bottom dead center. Arcuate areas at top and/or bottom dead center permit constant volume combustion and/or exhaust as desired during a particular cycle, whether that cycle be Otto or Diesel and whether it be two or four stroke.

Abstract: A key case and wallet unit combined, for carrying a plurality of keys together with driver's license, and a limited number of credit cards and currency, including coins. The case is comprised of two sections adjacent to each other such than an inner flexible dividing wall common to both sections separates each compartment. The inner flexible dividing wall is of flexible material and is received between and separates both outer walls where the inner flexible dividing wall and the outer flexible dividing walls are bound together.The key case section includes an outer flexible wall provided with a zipper closure in the midsection of that wall. A key ring is attached to the outer flexible wall by means of a material used from the cutting of that wall from which the zipper closure was formed. Separating this section from the adjacent section, is the forementioned inner flexible dividing wall.

Abstract: Standardized housing package for pulsed LED photoelectric controls optical control systems, in which the housing can be interchangeably used for any of the three basic scanning modes for optical controls, namely, through-beam, proximity, or reflex detection. The housing consists of a single, whole or two modular half-spherical head units which are received and supported in a main housing unit configured internally to receive the modular round head member.

Abstract: The structure includes a ground plane and at least two stacked microstrip elements with each microstrip element comprising a conducting plane and a layer of dielectric material. The conducting planes and the intermediate dielectric layers are configured so that they resonate at closely spaced frequencies. Each conducting plane in the structure, except the top one, includes an opening which is large enough to permit sufficient electric field coupling to occur between the microstrip elements so that the individual response characteristics of the conducting planes merge to form a broadband response characteristic. The antenna of the present invention thus has a substantially improved bandwidth over prior art microstrip antennas.

Abstract: A speaker housing includes an air-impermeable first chamber in which first and second speakers, each having diaphragms which vibrate in operation, are so mounted that the rear surfaces of the diaphragms of both speakers face the inside of the first chamber and the front surfaces of the diaphragms of both speakers face outside the first chamber. The axes of the two speakers are perpendicular. The front surface of the diaphragm of the second speaker faces the inside of a second chamber in the housing which includes a slant board oriented at an angle to the axis of the second speaker. The two speakers are driven such that the sonic pressure wave off the rear surface of the diaphragm of the first speaker is effectively coupled from the air-impermeable first chamber through the second speaker, maintaining the pressure within the air-impermeable first chamber substantially constant.

Abstract: An apparatus for generating electrical pulses which are suitable for application to selected areas of the user's body for pain control or muscle stimulation. The current level, pulse width, pulse rate, voltage level and pulse configuration are all controlled to produce the desired effects. The apparatus includes a timing circuit which emits pulses of selected width and repetition rate. The pulses from the timing circuit energize a switching circuit which selectively connects the primary of a pulse transformer to a power source. The transformer is so constructed and arranged that it operates near saturation, thereby effectively operating as a current limiter, which helps to prevent spikes in the electrical pulse output of the apparatus.

Abstract: A fluid bearing having improved operating characteristics. The platform to which the bearing is attached and which supports any load includes the necessary conduits for supply of fluid under pressure as well as the necessary structural integrity to support the expected load. The conduits are, with respect to the bearing and the plenum area of the bearing, in a particular, predetermined relative location. When the bearing is in a deflated condition and fluid under pressure is introduced, the initial fluid flows into the bearing and the plenum at a predetermined rate. The deflated bearing structure restricts fluid flow into the plenum until after the bearing is substantially inflated. The controlled flow to the bearing and the plenum allows a substantial pressure differential between the interior of the bearing and the plenum. Upon reaching inflation, fluid under pressure can freely flow into the bearing, into the plenum and between the plenum and the interior of the bearing.

Abstract: The pipe bleeder includes a small holding tank and a sample tube, both of which are filled with water and exposed to the ambient atmospheric temperature. The water in the sample tube freezes first when the ambient temperature is at freezing, which in turn causes a piston and then a push rod in the sample tube to move, the top of the push rod acting against a small cover plate in the holding tank, moving it away from a drain connection. When the cover plate is so moved, water from the water supply pipe will flow at a relatively slow but steady rate through the drain connection to the environment, maintaining a flow of water through the supply pipe and thus preventing the water in the water supply pipe upstream of the pipe bleeder from freezing. An exterior thaw tube is also attached to the drain connection in the holding tank.