Abstract: A hand-held valve structure for use with an oral evacuator system of the type which includes a vacuum source/waste disposal unit connected to the valve structure through a flexible vacuum hose. The valve structure includes an elongated body member having a central bore which is coupled to the vacuum hose. The upstream end of the body member includes a valve seat which surrounds the central bore. A poppet or valve piece, which is positioned adjacent the valve seat, is secured to the one end of a connecting rod, the rod being slidably-mounted on the body member. A detachable cover having a central bore is secured over the valve seat of the body member. The cover is provided with a slot which provides access to the connecting rod. A thumb latch is provided which is connected to the connecting rod through the cover member slot. A cam spring is positioned around the body member and engages the thumb latch so as to latch the poppet in either an open or a closed position.

Abstract: A concrete finishing adapter is disclosed which enables a user to adjust the angle of a bull float or the like, which is adapted for connection to the adapter. The angle of the bull float is adjusted so that it does not gouge into the unset surface of concrete. The adapter includes a base plate, a yoke, a handle receiving member extending through the yoke, a braking sleeve inside the yoke through which the handle receiving member passes, and a rod which connects the handle receiving member to the base plate. Rotation of the handle receiving member in either a clockwise or counter-clockwise direction causes the rod to move the base plate relative to the handle so that the angle of incidence of the base plate (and attached smoothing plate) relative to the concrete surface, is adjusted so that, when the user pushes the smoothing plate away, the forward edge of the smoothing plate is tilted upward.

Abstract: A lightweight emergency lighting system capable of arrangement into various subjective configurations is provided. A housing member supports a plurality of individual lighting elements mounted on a common semi-rigid bus bar. The upper configuration of the housing members is capable of a directional transmission of light towards a predetermined field angle, while the lower configuration is adaptable for mounting the lighting elements. The upper housing member can have an interior surface of a prismatic configuration to provide a refraction and reflection of light in combination with the exterior surface. The lighting elements, such as L.E.D.'s, can be excited through a pulsing circuit to maximize the light output while conserving power from an auxiliary battery source.

Abstract: A telephoto lens system comprising a front lens group of a positive refractive power fixed on the optical axis and a rear lens group of a negative refractive power is provided. The rear lens group consists, from the object to the image side, of a first positive subunit fixed on the optical axis, a second negative subunit movable along the optical axis and a third positive subunit fixed on the optical axis, the second negative subunit being movable toward the image side for focusing to a closer object. The object side end surface of the first positive subunit is concave and fulfills the following condition in relation with the front lens group:0.6<.vertline..phi.'.sub.II-1 .vertline./.phi..sub.I <2.

Abstract: The disclosure relates to a vacuum sintering furnace having a lubricant eliminating section, sintering section and cooling section which are aligned in series and connected by connecting hood means to each other so that a workpiece may be directly transferred to the following section without exposure of the workpiece to outside air. The connecting hood means comprises doors for selectively opening and closing the boundaries between the neighboring sections. Furthermore, the lubricant eliminating section is provided with a lubricant trapping device mounted on an exhaust line connecting a furnace body and a vacuum pump to each other, thereby the stable operation of the vacuum pump is ensured.

Abstract: An exposure control device for a photographic enlarger includes a printing control means for controlling the exposure of a printing section having a light source. When a printing start means is manually operated, the printing control means actuates the printing section to start the exposure of printing and actuates an attained exposure amount outputting means to measure at each segment of time an amount of exposure attained from the start of printing to that time. A suspending signal for temporarily stopping the exposure and the measurement is generated and fed to the printing control means, when a ratio of the attained exposure to a desired exposure reaches an integer multiple of a fixed ratio of exposures. The exposure of the printing section and the measurement of the attained exposure amount are suspended in response to this suspending signal, and an operator can perform a preparatory operation for the shading and/or burning-in printing process during the suspension.

Abstract: A zoom lens system comprising a first lens group of a negative refractive power, a second lens group of a positive refractive power located on the image side of the first lens group with a first variable air space, a third lens group of a negative refractive power located on the image side of the second lens group with a second variable air space and a fourth lens group or unit of a positive refractive power located on the image side of the third lens group with a third variable air space is provided. The first and third variable air spaces are reduced and the second variable air space is increased in accordance with the increase of the focal length of the whole lens system during the zooming. The absolute value of the focal length of the third lens group is greater than that of the second lens group.

Abstract: A reconfigurable toy assembly having foldable portions to allow the toy assembly to simulate a toy combination vehicle having a tractor unit and a trailer unit separatably connected to each other. The tractor unit when separated from the trailer unit is reversibly reconfigurable into a robotic humanoid form, while the trailer unit is reversibly reconfigurable into a play space for the robotic humanoid.

Abstract: A Gauss type objective lens system with a high speed of F1.2 for 35 mm SLR cameras is provided. The lens system consists of seven lenses, the object side surface of the second lens being aspheric, and fulfills the following conditions:0.65<Da/Db<1.1B<0 and C<00.55f<R<fwherein: Da represents the sum of axial distance from the object side surface of the second lens to the image side surface of the third lens; Db represents the sum of axial distance from the object side surface of the fourth lens to the image side surface of the fifth lens; B and C represent the aspheric surface coefficients of the fourth degree and of the sixth degree, respectively; f represents the focal length of the whole lens system; and R represents the paraxial radius of curvature of the object side surface of the second lens.

Abstract: A seam tracker in which a shaft containing a position-indicator-member, e.g., a ferromagnetic portion, is attached to a probe, and is mounted on a ball joint and the ball joint is pivotally mounted on a pin the ends of which extend through slots in a housing. Spring means urge the pin ends against one end of the respective slots. A mechanical null position spring urges the shaft to a mechanical null position off of the longitudinal axis of the housing. A means responsive to changes in position of the shaft from an electrical null position along the longitudinal axis of the housing gives an output to drive a control apparatus to correspond to changes in position of the probe represented by changes in position of the shaft.

Abstract: A wire bundle or cable clamp primarily adapted for use in the aviation industry is disclosed. The clamp includes a flexible strap having a serrated portion and a strap receiving member to which the strap is mounted onto the strap receiving member and is biased to engage the serrations of the strap. The strap includes an enlarged head at one end and the strap receiving member includes an opening on one side thereof to receive and hold the enlarged head of the strap when it is inserted in a direction perpendicular to a plane formed by the central axis of the strap when the strap extends around a wire bundle or the like so that the enlarged portion of the strap may be looped around the wire bundle and then inserted into the strap receiving member while the other end is secured in the strap receiving member by the pawl. The free end of the strap extending beyond the pawl may then be grasped and pulled to tighten the strap around the wire bundle.

Abstract: A camera system with an auto-focusing system includes a camera body and an interchangeable zoom lens. The interchangeable objective lens stores various data to be sent to the camera body for improving automatic focus adjustment, such as an information necessary to convert the detected defocus information into a movement of the driving power source to carry out the automatic focus adjustment. The driving power source in the camera body is controlled in response to the data from the interchangeable objective lens and the detected focus information, the driving power being transmitted to the interchangeable objective lens. The camera body is further capable of inhibiting the focus adjustment or focus indication in response to a data from the interchangeable objective lens under an unfavorable condition.

Abstract: A camera system includes a data source provided in a camera accessory such as an interchangeable lens and a micro-computer in a camera body. A requesting data for requesting particular data related to the lens is sent from the camera body to the lens, whereby the lens produces the particular data and sends it to the camera body. By the use of the particular data from the lens and other data obtained from the camera body, the micro-computer carries out exposure calculations and controls the camera based on the calculated result.

Abstract: A tape and paper dispensing apparatus which has a C-shaped tubular frame and handle combination to which are also mounted a bracket for the tape and paper roller drums and a bracket for the cutting blade. The frame doubles as a handle and is made more stable by the placement of a thumbrest bracket on the tubular handle/frame. A depressor bar is spring biased to contact the point of adhesion of the tape to the paper on the paper roll and has a pressure applying foot which assists in insuring proper adhesion. The position of the end of the paper roller drum relative to a tape dispensing path is adjustable.

Abstract: A copying machine includes a drive motor for driving the copying machine, a device for generating a start signal for starting the drive motor, an auto-shut device for stopping the drive motor a predetermined period of time after the completion of a copying operation, and a mechanism for carrying out a multi-copying operation in which a plurality of copying operations are carried out sequentially.

Abstract: A digital electronic watch having a matrix game display comprising a plurality of game display element arranged in a matrix on the display, each having at least two game display element segments and with selective illumination of game display element segments, to simulate movement about the matrix of game play units and interaction between game play units, in response to a stored program with the stored program also including instructions performed in response to player input during the game, and including sound effect generation during the game.