Abstract: A method for manufacturing a puzzle post card comprising providing a first backing, adhering a picture to one surface of said backing, adhering said first backing to a second backing containing an address means whereby only the perimeter of said first backing is adhered to said second backing, cutting said first backing in the non-adhered to portion to form a puzzle, adhering a plastic cover over said puzzle to hold said puzzle in place during mailing.

Abstract: A high-speed nut having two jaws capable of taking up two positions, one in which the central tapping is not engaged with a threaded rod, and a second in which the tapping is engaged therewith. According to the invention, the nut comprises two pieces (10, 11) which are hinged to each other about an axis (13), with pivoting of the pieces being caused by the front portion (15) of the pieces coming into contact with the object to be clamped.

Abstract: The present invention is directed to coating compositions of surge arrester electrodes which do not contain any radioactive materials and which permit the surge arrester to operate both in a well-lighted environment and in a dark environment.The coating composition for the electrodes of a surge arrester contains at least some aluminium, titanium and a product of the type MA or M.sup.n+, A.sup.n- in which M represents an alkaline metal, A a sulphate or a carbonate of this metal and n is equal to 1 or 2.The invention has preferred application for the coating of the electrodes of miniature or three element surge arresters.

Abstract: In the formation of a dental restoration unit, a procedure for securely bonding composite resin material to a core structure is employed. A core structure comprising, for example, metal, is wholly or partially covered with a cohesion layer comprised of a blend of lithium, aluminum silicat and fused quartz silicate. The composite resin material is fused to the cohesion. The resulting restoration unit, such as a crown, is less liable to fracture than is porcelain, and can provide a surface which is no more abrasive than is natural tooth enamel.

Abstract: A safety support structure is provided which comprises a post with upper and lower ends adapted to abut firmly against a ceiling surface and a floor surface, and an accessory mounting region disposed between the upper end and the lower end. The post has a length adjustment means and a pressure indicating means to indicate whether the pressure on the structure, when positioned between a floor surface and ceiling surface, lies inside or outside a predetermined range so as to avoid inflicting damage on the floor or ceiling and to inhibit slippage of the post. The accessory mounting region carries mounting formations, to cooperate with laterally extending support accessories clamped to it and positively to resist axial and/or rotational displacement of the support accessories relative to the post.

Abstract: A wire management clip for use in connection with pre-formed openings in a surface including for use on the underside of a work surface, the clip having a base and a resilient arm extending from the base. The resilient arm retains wires in close proximity to the underside of the work surface. The wire management clip also includes a projection having a series of spaced apart flanges thereon for gripping the inner surface of the opening in the surface.

Abstract: An adaptor to convert an ordinary plastic bottle of the kind in which pool chemicals are sold into a device for protecting a swimming pool skimmer against ice damage during the winter.

Abstract: A device for combined drilling and riveting of a type including a "C"-shaped support frame. According to the invention, the means for drilling (14) and the rivet set (69) are arranged in a manner such that they may travel in directions which are at an angle in relation to the axis of the combined drilling/riveting head, the necessary pressure being supplied by two arms (2,3) driven by hydraulic jacks and the parts to be assembled (A,B) clamped one against the other by the jaws (6,7) of a plate grip throughout the operating cycle.

Abstract: An auxiliary working bowl for a food processor is mounted without a lid between the top of the sleeve (4) in the main bowl (1) and beneath the lid (2), with a tool (8) fixed to the drive shaft (5) rotating inside the auxiliary bowl (7).

Abstract: The invention relates to a method of rendering a soil or another material like a mortar, a binder, or a concrete impervious by injecting it with a silica solution. A finely ground powdered compound containing calcium with a solubility in water of between approximately 0.01 g/l and approximately 2 g/l is mixed into the silica solution, which has a ratio of SiO.sub.2 to Na.sub.2 O of between 1 and 1.3, before injection.

Abstract: A keel assembly for a water craft. The keel assembly has a body having an aerodynamic cross section with a pair of side faces and a leading edge section. A portion of the leading edge section is movable relative to the body. A pair of vanes are spaced from and connected to the leading edge section to be disposed within a flow of water past the body. A pair of arms join the vanes with the portion. Movements of the vanes pivot the portion toward the direction of flow of the water to offset the effects of a negative pressure region occurring at the leading edge section.

Abstract: An operational amplifier is provided and includes at least two input terminals of one polarity and another input terminal of the opposite polarity. The amplifier includes an amplifying portion which comprises a differential section for receiving input signals applied to the input terminals. The differential section includes at least two differential amplifiers which form difference signals from the input signals. A summing section receives the difference signals and forms a sum result therefrom. A multiplying section provides an amplification gain to the sum result to form an output signal of desired gain. The amplifier is also provided with a feedback for applying an input signal to one of the input terminals, the output signal. The amplifier can be configured to provide amplification gains of 2, 1/2, -1 and 1.

Abstract: An air deflector for delecting air exiting from a residential floor vent to a location remote therefrom, comprising a first element having an inverted u-shaped cross section formed by a central wall panel and a pair of side walls depending from opposite longitudinal edges thereof, an end wall panel depending from the central wall panel and joining the side walls to form an inlet end, a second element having an inverted u-shaped cross section formed from a central wall and a pair of side walls depending from opposite longitudinal edges thereof, the second element being dimensioned telescopingly to engage with the first element with the central wall panels in abutment so that one end of second element extends beyond the first element to form an outlet end, the first and second elements being dimensioned so that when telescopingly engaged, the side and end walls of the first element and the side walls of the second element have substantially coplanar distal edges extending along the length thereof to lie against

Abstract: A multi-layer composite protective panel having layers of aluminum (1), a laminated composite (3), and a ceramic (b 5), which layers are glued together by an aliphatic polyurethane polyether resin (2, 4) having a Shore A hardness of about 75 and having a softening point of 125.degree. C. The panel is particularly suitable for use as bullet-proof armor plating.

Abstract: A horizontally mounted electrical cut-out device is provided. The device includes an insulator electrically isolating a pair of terminals and a fuse assembly comprising a fuse carrier housing a fuse element removably connected between the terminals. The fuse assembly is pivotally connected at one end to one of the terminals to allow the other end of the fuse assembly to engage the other terminal when the fuse assembly is pivoted. The pivotal connection is such so as to permit the fuse assembly to drop automatically to an open position following an interruption resulting from an overload or fault thereby establishing an open circuit condition. This increases safety and provides a visible indication of the open circuit condition. A latch is provided on the other terminal to engage releasably the other end of the fuse assembly to maintain the electrical connection between the two terminals.