Abstract: A generally trumpet-shaped fastener includes a generally circular flange portion flared outwardly from an elongated pin portion. The fastener is hollow and open at the flange portion and the opposite end of the pin portion, thus allowing air to escape during securement of the fastener to an attachment member that is to be held in place on a base member by the fastener. In addition, a number of discrete ridges or other protuberances are formed on the outer side of the flange portion in order to enhance the engagement and securement of the flange portion of the fastener to the underside of an attachment member, either by integrally molding or by ultrasonic welding.

Abstract: A security document is provided comprising: a security image area on the face of the document and a printed security image within the security image area. At least a portion of the security image area is divided into a plurality of image element cells, such that the image element cells define an array of image element cells across the security image area. Each of the image element cells is divided into a plurality of pixels, such that each image element cell defines a cell pixel array. At least a portion of the security image area is divided into a plurality of complementary image element cells, such that the complementary image element cells define an array of complementary image element cells across the security image area. Each of the complementary image element cells is divided into a plurality of pixels, such that each complementary image element cell defines a cell pixel array. The printed security image comprises image elements and complementary image elements.

Abstract: A process of manufacturing acrylonitrile or methacrylonitrile by the catalytic reaction in the vapor phase of a paraffin selected from propane and isobutane with molecular oxygen and ammonia by catalytic contact of the reactants in a reaction zone with a catalyst, the feed composition having a mole ratio of the paraffin to ammonia in the range of from about 2.5 to 16 and a mole ratio of paraffin to oxygen in the range of from about 1.0 to 10, wherein said catalyst has the elements in the proportions indicated by the empirical formula:VSb.sub.m A.sub.a D.sub.b Q.sub.q R.sub.r O.sub.xwhereA is one or more of Ti, Sn, Fe, Cr and Ga;D is one or more of Li, Mg, Ca, Sr, Ba, Co, Ni, Zn, Ge, Zr, Cu, Ta, Bi, Ce, In, B and Mn;Q is one or more of Mo, W, and Nb;R is one or more of As, Te, and Se;m equals 0.8 to 4;a equals 0.01 to 2;d is 0 to 2;0.ltoreq.q<0.01; preferably 0<q<0.01, especially 0<q<0.005q+r are greater than 0;x is determined by the oxidation state of the cations present.

Abstract: A security document and its method of preparation are provided wherein a security image area on the face of the document is designated. The security image area comprises a two-dimensional array of security image blocks. Security image elements and the complementary security image elements in respective security image blocks are arranged such that the security image element and the complementary security image element portions occupy respective first and second percentages of each of the security image blocks to define respective characteristic relative occupation values (CROVs) for each security image block. The respective CROVs are substantially equivalent among a plurality of the security image blocks. A target CROV is established.

Abstract: A sensor system. The system comprises a binary sensor issuing a signal representative of a first or second condition; sampling circuitry, operatively connected to the binary sensor, for monitoring the number of transitions between the first and second conditions during a sampling period; integration circuitry for accumulating the sampled number of transitions over time; and signal generation circuitry for issuing an analog signal representative of the accumulated transitions.

Abstract: A faucet fitting system having interchangeable components useable in both single handle and dual handle faucet fixtures. The component system is designed to allow the same putty plate with breast plate, waterway spout, aerator and mounting nuts to be used with the various escutcheons, metering valves and waterways associated with the single handle and dual handle faucet fixtures. Specially constructed water valves, putty plates and escutcheon constructions useable in conjunction with the system are also disclosed.

Abstract: A business form or mailer intermediate providing fold-over carbonless imaging is provided. The form or mailer includes separate CB and CF coating portions on a single sheet. When the form or mailer is folded about a fold line, the CB portion comes in contact with the CF portion. An image is created when the fold-over carbonless area is subjected to an imaging force.

Abstract: A process of manufacturing acrylonitrile or methacrylonitrile by the catalytic reaction in the vapor phase of a paraffin selected from propane and isobutane with molecular oxygen and ammonia by catalytic contact of the reactants in a reaction zone with a catalyst, the feed composition having a mole ratio of the paraffin to ammonia in the range of from about 2.5 to 16 and a mole ratio of paraffin to oxygen in the range of from about 1.0 to 10, wherein said catalyst has the elements in the proportions indicated by the empirical formula:VSb.sub.m A.sub.a Mo.sub.b D.sub.d O.sub.xwhereA is one or more of Ti, Sn, Fe, Cr and Ga;D is one or more of Li, Mg, Ca, Sr, Ba, Co, Ni, Zn, Ge, Nb, Zr, W, Cu, Te, Ta, Se, Bi, Ce, In, As, B and Mn;m equals 0.8 to 4;a equals 0.01 to 2;0<b<0.005;d is 0 to 2;x is determined by the oxidation state of the cations present, and the catalyst has been heat treated at a temperature of at least 780.degree. C.

Abstract: A fill valve has a main valve with a valving surface contacted by a valve disk. A series of offset radial paths separated by a toroidal path permit free radial flow at full open and quiet tortuous flow as the valve closes. Removal of a cap permits access to the main valve for cleaning. Indicia in the valve body provide easy height adjustments. A riser base is made up of easily molded locking parts and provides a variable height adjustment structure that is shielded from view. A flexible cup performs multiple functions including serving as a pilot valve, a vacuum breaker valve and a seal. A float for operating the pilot valve is pivotally mounted without extra parts or fasteners.

Abstract: A compact gas fired water heater is provided for recreational vehicles or the like, with higher recoveries and greater efficiencies resulting from increased heating surface and smoother flow of gases in the combustion chamber. The combustion chamber is comprised of two straight horizontal lengths of tube joined in the rear by a specially formed coupler with an additional plate between the tubes to close the front of the coupler.

Abstract: A compact endothermic reaction apparatus employing metallic reaction tubes in a close-pack arrangement using offset nozzle tubes and an air distribution plate for introducing fuel and air into a combustion chamber to produce long and thin flames thereby to avoid excessive localized heating of the reaction tubes and provide high reaction tube life expectancy. Also, excessive localized heating of the reaction tubes at the inlet ends of exhaust tubes is eliminated and provision is made for preventing buckling of individual reaction tubes that may be subjected to higher than average reaction tube temperatures.

Abstract: A shipping envelope comprising first, second and third panels, each having a front and a back, are adjoined side to side adjacent a first fold line between the first and second panels, and a second fold line between the second and third panels. The first panel has fixed information including a return address on the front and a first adhesive on the back to secure the first panel to a shipping container. The second and third panels include one or more areas for printing a delivery address and other variable information. A second adhesive secures the first panel to another panel when the panels are folded along the first and second fold lines so that they overlie the first panel, so that the delivery address is facing out on the envelope. Advantageously, the second and third panels comprise a first ply and the first panel comprises a second ply with the first and second plies overlying one another and secured together by a third adhesive therebetween adjacent the first fold line.

Abstract: The effective flow area of a restriction in a gas flow passage, such as that of a gas turbine nozzle or vane, is determined by use of a large reservoir containing pressurized gas which is discharged through the passage in a blowdown operation in which the ratio of back pressure of the restriction to gas pressure in the reservoir is maintained below critical for sonic flow; a timer may be used to measure the time for a predetermined fall of pressure in the reservoir whilst there is sonic flow through the restriction.