Abstract: A Fresnell lens and filter are disposed in a frame adjustably pivotally attached to a bar extending from a cabinet having a viewing screen for a computer, e.g. The bar is movable to adjust the distance of the lens from the screen and the height of the lens relative to the screen. A clamp for the bar is mounted on the cabinet which, when loosened, permits such adjustment and when tightened fixes the bar in position.

Abstract: A male bookbinding member comprises a relatively thin, narrow strip having studs projecting therefrom at intervals. The ends of the studs are formed as male paper punches. A female paper punch comprises a female bookbinding strip having holes at the same intervals as the studs. Individual or small batches of paper (or other sheet material) are brought into position overlying the female punch. The male member advances toward the sheets punching them in cooperation with the female strip. The paper remains on the studs. The operation is repeated until all the sheets of the book are on the studs. The strips are forced together, excess stud lengths cut off and heads formed on the ends of the studs to rivet the book together or the strips are held together by other means. Alternatively, a hardened female punch die is used and the female binding strip brought into contact with the studs after the sheets are assembled thereon.

Abstract: A mask to protect dentists from handpiece splatter which contains all manner of germs and viruses and has a visor which attaches to the head above the eyes and a transparent shield which extends down below the mouth. The shield is preferably detachable from the visor for cleaning and replacement. The visor has a vent for air circulation which may be closed by a cover for protection. A filter may be applied to the shield for eye protection when ultraviolet light is being used for curing plastic tooth cavity fillings.

Abstract: Punches for paper and the like have a metal pin having a male punch element formed on one end and a pressure application area on the opposite end. To withdraw the punch pin an enlargement is formed at or near the opposite end, the enlargement cooperating with a gripper or a spring in the punch to cause the pin to retract when the pressure applicator retracts. In accordance with the present invention a circumferential groove is formed in the punch pin and a collar of plastic material is formed around the pin protruding into said groove and functioning as the enlargement.

Abstract: A soccer practice machine (10) has a planar surface (14) and a delivery tube (20) configured and positioned to deliver a soccer ball (24) proximate to the planar surface (14). A blower (26) provides sufficient air in the tube (20) for ejecting the soccer ball (24) from the delivery tube. A target (16) corresponds dimensionally to a soccer goal and is positioned remote from the delivery tube (20) and planar surface (14). A figure (42) attached to drive (44) is movably positioned in front of the target (16).

Abstract: A container having a neck formed with external shoulders and grooves below the shoulders is closed by a plastic cap having a depending skirt formed with interrupted internal beads which lock under the neck shoulders and are received in the neck grooves. A circumferential scoreline is formed in the skirt above the lower bead and is connected to a second scoreline which extends down to the lower edge of the skirt. Adjoining the terminus of the second scoreline is a tab which may be gripped and pulled to tear the skirt upward along the second scoreline and then circumferentially around the first scoreline to remove the lower part of the skirt and make it possible to remove the remaining portion of the cap.The improvement consists in making the bead sections in various truncated conical shapes distributed in various patterns. These shapes facilitate application of the cap to the neck without splitting the former or crushing the latter.

Abstract: A horn antenna is supported by a pair of axially spaced apart trunion assemblies which are rigidly attached to the upper one of a pair of nested ring shaped members, the lower ring member being rigidly attached to a platform. Flat ring shaped flanges on the tops of the members are in contact for rotatably supporting the upper ring member in the lower ring member. Rotation of the antenna is accomplished with a turnbuckle that is connected between the perimeters of the two flanges. Each trunion assembly comprises a bolt that is welded to the top of the upper flange and that has a nut thereon supporting one side of the antenna. Elevation adjustment of the antenna is accomplished by threading the nut on the trunion bolt for raising or lowering the associated side of the antenna.

Abstract: A pair of bolts are welded to axially spaced apart points on a base plate in an upright position to provide fixed reference points for supporting a horn antenna. Axially aligned trunnion pipes on the antenna are rotatably attached to an associated tubular enclosure at points corresponding to the locations of the bolts. Each of the bolts extends through an opening in one side of an associated enclosure, with the one side being sandwiched between a pair of nuts. Elevation adjustment of the antenna is accomplished by rotating one of the nuts for raising or lowering one of the enclosures and the associated side of the antenna. The elevation of the antenna is maintained by threading the associated other nut of the pair thereof against the side of the enclosure.

Abstract: A tube bender has two readily connectable and detachable members. A base member has a block with two parallel grooves. The tube groove is formed in an arc having the radius of the desired bend and a cross-section with a radius corresponding to the tube diameter. The second groove has straight sides and an arc similar to the tube groove. Pivotally mounted on the base member adjacent the block is a retainer. In its first position a radius therein clamps the tube in the tube groove. In its second position, a fork fits over the conventional ferrule of a connector fitting. The block is notched opposite the retainer to receive the outer end of the fork and a connector nut. The forming member has a crescent-shaped end of a radius complementary to the second groove so that the crescent may fit snugly in the second groove. A forming block on the forming member engages the outside of the tube and causes it to conform to the shape of the groove. For manual operation, the two members have diverging handles.

Abstract: A cap for a wide-mouth container has a short inner skirt and a longer outer skirt. The outer skirt has upper and lower internal locking beads which are preferably interrupted with gaps between bead sections. Above the lower locking bead is a circumferential score line. A portion of the outer skirt below the score line is cut away in a horizontal and then an arcuate slit to form a pull tab extending parallel to the score line. The pull tab is joined to the outer skirt by a frangible link. Various locations of said link are disclosed. The container neck is thin walled, having an internal top flange terminating in a first sealing surface which bears against the top of the inner skirt, a groove below the last-mentioned surface and a second sealing surface below the groove which also bears against the inner skirt. The neck also has upper and lower external beads each having shoulders on their lower edges under which the upper and lower internal locking beads of the cap seat.

Abstract: A first plastic strip has longitudinally spaced studs each of which can be bent over at a 90.degree. angle. A second strip has holes through which the studs fit and grooves which receive and secure the bent over studs. Several stud shapes and bent stud retaining grooves are described. Paper punched to receive the studs is clamped between the two strips. The studs are then bent over into grooves in the second strip and held in bent position. The paper is thus securely bound. A channel may be slipped over the outside of the second strip to conceal the bent studs and further secure them in place.

Abstract: Each of a pair of annular, especially non-circular, apertured flanges for vacuum joints are formed by machining an outer groove spaced in from the outer edge, an inner groove extending inward from the inner margin of the joint and an outward slanted side interconnecting the two grooves resulting in a sharp corner on the inner edge of the inner groove. A flange spacer, apertured to receive the bolts which draw the flanges together is positioned in the outer groove of both flanges. A soft metal (e.g., copper) gasket overlies the inner grooves. When the bolts are tightened, the gasket deforms outwardly under the pressure of the sharp corners to seal against both slanted surfaces to form an ultra-high vacuum joint which is "bakeable." For temporary testing of joints a portion of the gasket immediately overlying the corners may be replaced with an elastomeric ring.

Abstract: A cap for a container neck has a skirt formed with beads on its inner surface which cooperate with matching grooves in the neck to retain the cap in place when the skirt is intact. A circumferential groove is formed in the skirt intermediate the beads joined with a second groove extending to the bottom edge of the skirt. A tab projecting beyond the skirt is gripped and pulled, causing the skirt to tear upward and then circumferentially, thereby removing the lower bead and permitting the top of the cap to be removed and re-closed. A flange is formed on the exterior of the skirt immediately above the level of the first groove. The flange prevents the skirt from tearing upward above the first groove. It also facilitates prying the cap off the neck when the lower part of the skirt has been torn off. Various flange shapes are disclosed, several of which are shaped to defeat attempts to pry off the cap before the skirt is torn.

Abstract: A tamper-resistant plastic cap and container neck are disclosed, the cap having a skirt with upper and lower internal beads separated by a circumferential first score line connected to a second score line extending to the lower edge of the skirt. The neck has external beads matching the skirt beads to hold the cap on the neck. By pulling upward on a tab depending from said lower edge adjacent said second score line, the lower part of the skirt may be torn away along the second and then the first score line. This leaves a reclosure cap held on the neck by the upper bead means. A thin flange projecting from the periphery of the cap is used to remove the cap in its reclosure mode. However, this flange is shaped with its underside slanting down-inward to merge with the exterior of the skirt. If one attempts to use the flange to pry off the cap in its original sealing mode, sufficient force cannot be applied. Various cap bead shapes are disclosed.

Abstract: A prime mover is connected by a series of universal joints to a crank which reciprocates a weight. The joints are arranged in such manner that the weight moves substantially faster in one direction than in the opposite direction causing a force to be applied to the structure in the first direction. When the structure is mounted on a vehicle the vehicle is caused to move in the first direction.

Abstract: A first plastic strip has longitudinally spaced studs each of which can be bent over at a 90.degree. angle. A second strip has holes through which the studs fit and grooves which receive and secure the bent over studs. Paper punched to receive the studs is clamped between the two strips. The studs are then bent over into grooves in the second strip and held in bent position. The grooves have overhanging lips which detachably retain the studs in place. The paper in thus securely bound. To prevent cracking the studs, the abruptness of the 90.degree. bend may be relieved by forming an annular depression around the base of each stud.

Abstract: A probe comprising an electrically conductive polymer and a pair of electrodes is placed to be contacted by the chemical. Contact changes the molecular structure or arrangement and changes the resistivity of the polymer, which is measured to actuate an indicator and/or alarm. The probe may be incorporated in a float. The chemical detector may be combined with a water detector.

Abstract: Debugging and development of hardware and software for microprocessors make desirable use of commercially available logic analyzers and in circuit emulators. The probes of the former have heretofore comprised clips which have been clipped onto exposed contacts on the plug of an emulator probe, the pins of which have been fitted into sockets in a printed circuit board or the like to replace a removed microprocessor. The foregoing step has been difficult (in part because of space limitations when as many as 64 clips have been required), time consuming and subject to possible error. A combination plug socket is provided in accordance with this invention. The pins of the plug side of the latter fit into the socket in the board and are connected to wires leading to the logic analyzer with a buffer resistor network interposed. The pins of the plug of the emulator fit into the socket side of the plug/socket.

Abstract: A tool for use with a type of bookbinding strips wherein one strip is formed with bendable studs and the second strip is formed with holes and grooves in one surface extending away from the holes. The grooves are preferably formed with overhanging top longitudinal edges so that the studs, after passing through holes in the pages of the book and the holes in the second strip may be bent down into the grooves, snapping under the overhanging edges. The tool of this invention may be gripped at one end and drawn along the top of the second strip, bending the studs down into the channel. For this purpose, the end is curved and also recessed to receive the second strip. To bend the studs upward to debind the book, the tool is also formed with a shallow slot having a protrusion therein formed on one or opposite sides with depressions into which the pointed end of a stud may fit. By pulling the tool away from the second strip, the stud is bent upward to approximately its original position.