Abstract: A flashlight has a housing having a battery containing portion with a closed back end and an open front end, and a light source containing portion integral with and extending from the front open end of the battery containing portion. The battery containing portion is substantially triangular in transverse cross-section with rounded corners which form three battery containing chambers within the battery containing portion. Three spiral springs are in the battery containing portion and are seated on the closed end of the battery containing portion with each spring being in alignment with a battery chamber. Two of the springs are electrically connected together the third spring has an electrode wire extending along one side of the battery containing portion to the light source containing portion. The light source containing portion is cylindrical and has its longitudinal axis in alignment with one of the battery chambers in the battery containing portion.

Abstract: A beacon light includes a tubular bottom shell having a closed end and an open end. A battery housing is in the bottom shell and is adapted to contain batteries and connect them in series. A tubular, translucent light diffuser is on and secured to the open end of the bottom shell. A printed circuit board is in the light diffuser. A plurality of light emitting diodes (LEDs) are mounted on the printed circuit board and electrically connected in parallel with respect to each other. Also on the printed circuit board is a switch and a integrated circuit which are electrically connect in series with the LEDs. The printed circuit board also has battery contacts at one end which engage electrodes on the batteries in the bottom shell so as to connect the LEDs to the batteries through the switch and the integrated circuit. A switch button extends through the light diffuser and is adapted to engage the switch to operate the switch. A cap is on the top of the light diffuser.

Abstract: A battery operated flashlight having a light emitting diode (LED) as its light source. At least one LED is mounted on a plate of an insulating material having a pair of contacts on a surface thereof. Each of the LED's has a pair of terminals with one terminal being electrically connected to one contact on the plate and the other terminal being electrically connected to the other contact on the plate. The plate is mounted in the open end of a housing of the flashlight which also contains at least one battery and a contact strip extending from the open end of the housing to the closed end of the housing where it contacts a terminal of the battery. A cylindrical spacer of an insulating material is within the housing and extends between the plate and the open end of the housing. A cup shaped cap is threaded onto the open end of the housing. When the cap is threaded onto the housing it is adapted to contact the spacer and press it against the plate.

Abstract: A circuit for determining power changes in an RF circuit includes first and second temperature sensitive resistors connected in parallel with an RF input terminal so as to have a common junction therewith. The first resistor has a positive temperature coefficient of resistance and the second resistor has a negative temperature coefficient of resistance. A DC input terminal is connected to one of the temperature sensitive resistors and an output terminal is connected to the common junction of the two temperature sensitive resistors. Third and fourth temperature sensitive resistors have a common junction. The third resistor has a positive temperature coefficient of resistance and the fourth resistor has a negative temperature coefficient of resistance. The DC input terminal is also connected to one of the third and fourth temperature sensitive resistors, and an output terminal is connected to the common junction of the third and fourth temperature sensitive resistors.

Abstract: An apparatus for cleaning parts includes a tank having an liquid inlet opening and a liquid outlet opening therein to allow a liquid, such as water to enter and drain from the tank. The tank also includes an air inlet window and an air outlet duct for allowing a flow of air to pass therethrough. An air duct having an air pump connected thereto extends across the outside of the tank between the air outlet duct and the air inlet window to provide a flow of air through the tank. A heater is in the air duct to heat the flow of air. A first overflow wall extends across and spaced from the air inlet window to provide an overflow passage for carrying away any liquid which may overflow the wall and prevent the liquid from entering the air inlet window. A second overflow wall extends across and is spaced from the air outlet duct to form an overflow passage for carrying away any liquid which may overflow the second overflow wall and prevent such liquid from entering the air outlet duct.

Abstract: A transmission line device includes at least two rectangular plates of an insulating material having opposed planar surfaces and edges. A transmission line of a conductive material is on a surface of at least one of the plates and extends between two opposed edges of the plates. The plate having a transmission line thereon has holes therethrough adjacent its opposed edges, which holes extend to the ends of the transmission line. The holes are filled with a conductive material which makes electrical contact to the ends of the holes. Ground planes of a conductive material are on a surface of the plates. The plates are stacked together with the surface having the transmission lines facing a surface of another plate, and the ground planes facing outwardly. The plates are mechanically secured together either by metal clips or by a suitable cement between the opposed surfaces of the plates. Terminals are at the edges of the plates and are connected to the ends of the transmission line and to the ground planes.

Abstract: A board game includes a board having on a surface thereof a pattern of squares. The squares are arranged in parallel rows extending between the sides of the board and extending substantially parallel to and between the ends of the board. Several of the rows of squares intermediate the ends of the board contain fewer squares than the other rows of squares. The row of squares at each end of the board is of a first color, the next two rows of squares are of a second color, the intermediate rows of squares are of the second color, and all of the other rows of squares are of a third color. The game includes a plurality of playing pieces with half of the pieces having a first cross-sectional shape and the other half having a second cross-sectional shape. The playing pieces of each cross-sectional shape have some pieces which are longer than the other pieces. The playing pieces are of different colors with one longer piece and one shorter pieces being of the same color.

Abstract: An RF termination load includes a base of an electrically and thermally conductive material having opposed surfaces. A recess is in one of the surfaces of the base and a groove in the one surface extends from the recess to an edge of the base. A resistor is seated in the recess in the base. The resistor includes a substrate of an electrically insulating material having opposed surfaces and a resistance film on one of the surface of the substrate. A first contact of a resistance film is on the one surface of the substrate at one end of the resistor and a second contact of an electrically conductive material is on the one surface of the substrate at the other end of the resistor. The second contact extends over an edge of the substrate and over the other surface of the substrate. The resistor is mounted in the recess with the second contact being seated on and contacting the base. An RF cable has an end in the groove in the base.

Abstract: A temperature compensating voltage variable attenuator includes at least two temperature variable resistors. The temperature variable resistors have different temperature coefficients of resistance, preferably, with one temperature variable resistor having a positive temperature coefficient of resistance and the other temperature variable resistor having a negative temperature coefficient of resistance. The temperature coefficient of resistance of the temperature variable resistors being such that the attenuation of the attenuator varies with changes in temperature of the attenuator. A voltage variable heater resistor is adjacent both temperature variable resistors so that a change in the voltage applied to the heater resistor changes the temperature of the heater resistor. The heat from the heater resistor is applied to the temperature variable resistors so as to change the resistance of the temperature variable resistors. This provides a controlled change in the attenuation of the attenuator.

Abstract: An attenuator includes a flat, substantially rectangular substrate of an insulating material having a surface. A plurality of termination areas of a conductive material are on the substrate surface and are spaced from each other. Three resistors are on the substrate surface and are connected in a series parallel combination between the termination areas. The resistors may be formed by three separate resistance layers extending between and connected to the termination areas, or a single resistance layer extending between and connected to the termination areas. A shunt capacitor is on the substrate surface and is connected to one of the resistors. The shunt capacitor is formed by an area of a conductive material on the substrate surface and overlapping a portion of the resistors, and a dielectric layer between the conductive area and the resistor.

Abstract: The temperature coefficient of resistance (TCR) of a resistor having a layer of a resistance material on a surface of a substrate and a termination layer of a conductive material at opposite ends of the resistance layer is adjusted by changing the area of at least one of the termination layers. The area of the termination layer is changed by removing a portion of the termination layer. The portion of the termination layer can be removed by making a cut through the termination layer which extends along a line across at least a portion of the termination layer. This method can be used to form matched pairs of resistors by first adjusting the resistance value of at least one of a pair of the resistors at room temperature to provide the resistors with substantially the same resistance values. The TCR of one of the resistors is then adjusted by removing a portion of one of the terminations of the resistor until both resistors have substantially the same TCR.

Abstract: A high power resistor includes a substrate of an insulating material having opposed first and second surfaces, and a strip of a resistance material on the first surface of the substrate. The resistance strip has side edges which are spaced from the side edges of the substrate. A contact of a conductive material is at each end of the resistance strip. Each contact extends to a separate end of the substrate, across the end and over a portion of the second surface of the substrate. The portions of the contacts which are on the second surface of the substrate or no longer than the portions of the contacts on the first surface of the substrate. At least one heat sink strip of a conductive material is on the second surface of the substrate. The heat sink strip is of a size that it does not overlap the resistance strip so as to minimize any capacitance between the heat sink strip and the resistance strip.

Abstract: A phase shifter in which the change in phase changes with changes in temperature. The phase shifter includes a plurality of capacitors and inductors connected in series relation to form a filter network. Each of the capacitors has a dielectric material with a temperature coefficient so that the capacitance of the capacitor varies with temperature. Each of the inductors has a ferrite material which has a temperature coefficient so that the inductance of the inductor varies with temperature. The temperature coefficients of the dielectric material of the capacitors and the ferrite material of the inductors have the same sign, i.e, either negative or positive, and preferably are of the same value.

Abstract: A flashlight includes a housing having an outer wall, a closed end and an open end. The outer wall is in the form of three semi-cylindrical portions forming within the housing three parallel pockets each of which is adapted to receive a stack of at least two batteries. A cap is threaded on the open end of the housing. The cap has therein a light bulb, a conical reflector and a lens across its end through which light from the light bulb can flow. Contact strips in the cap and contact springs in the bottom of the housing are adapted to connect the batteries and the light bulb in series. A switch is in the handle and is adapted to turn the light bulb off and on. A handle is removably mounted on the outer surface of the housing and extends radially from the housing.

Abstract: A Lange coupler device which includes a first layer which is a base substrate of a dielectric material such as alumina. Deposited on this substrate are second, third and fourth layers of the device. Each layer is made from a thick-film material. The second layer is a conductive layer, arranged in five parallel lines. One of the outermost lines is connected to the center line at one end of the substrate while the other outermost line is connected to the center line at the opposite end of the substrate. This leaves two lines unconnected at this layer. The third layer is a dielectric layer which has through-holes to: 1) each end of the unconnected lines of the bottom layer, 2) the unconnected ends of the outermost lines and, 3) the middle of the center line. The fourth layer of material is a conductive layer. The fourth layer is arranged as three parallel lines, each perpendicular to the lines of the second layer.

Abstract: A tongue scraper formed of a handle having a spoon shaped head at one end. The head has a relatively sharply rounded tip and increases in width from the tip to a mid-portion of the head. The head has substantially flat front and back surfaces. A scraper blade projects from the front surface and extends along the edge of the head from the tip to the mid-portion of the head. A plurality of scraper pins project from the front surface of the head and are arranged in a plurality of rows. The scraper pins have tapered top surfaces to provide them with a scraper edge. A plurality of holes extend through the head and are arranged in a plurality of rows. Each of the holes is of an area which can hold a liquid by capillary action.

Abstract: A chip resistor includes a substantially rectangular substrate of an insulating material having opposed substantially flat top and bottom surfaces and edges extending between the top and bottom surfaces. A layer of a resistance material is on the top surface of the substrate. Separate termination layers of a conductive material are on the top surface or the substrate and contact the resistance layer at opposite ends thereof. Each of the termination layers extends across an edge of the substrate and over a portion of the bottom surface of the substrate. The total area of the portions of the termination layers on the bottom surface of the substrate is greater than the total area of the portions of the termination layers on the top surface of the substrate so that the spacing between the ends of the portions of the termination layers on the bottom surface of the substrate is smaller than the spacing between the ends of the portions of the termination layers on the top surface of the substrate.

Abstract: An endoscopic device includes an endoscopic tube for insertion into a cavity to be viewed; an optical system including a video camera and illuminating means for viewing the cavity, the image on the screen being a noninverted image; and a removable, rigid, sterilizable or discardable sheath completely enclosing the endoscopic tube and the illuminating means to prevent their exposure to the cavity environment.

Abstract: An endoscopic device includes an endoscopic tube for insertion into a cavity to be viewed; an optical system including a video camera and illuminating means for viewing the cavity, the image on the screen being a noninverted image; and a removable, rigid, sterilizable or discardable sheath completely enclosing the endoscopic tube and the illuminating means to prevent their exposure to the cavity environment.