Abstract: The Diels-Alder adduct of 2,3 and 6,7 poly(allocimene) and an activated olefin such as maleic anhydride serves to inhibit the corrosion of metals. The adduct or a derived polyamine reaction product in admixture with an oil such as a petroleum oil or grease is effective to inhibit rusting of ferrous metals.

Abstract: A process is described in which, by the addition of formamidinesulfinic acid in association with an ozone or ozone/oxygen treatment, the viscosity and strength of wood pulps are stabilized at the level that is obtained with use of conventional, chlorine-containing bleaching processes.

Abstract: Compounds having the formula I: ##STR1## wherein M.sub.1, M.sub.2, M.sub.3 , independently, are hydrogen, C.sub.1 -C.sub.4 alkkyl, phenyl, a monovalent or an equivalent of a polyvalent metal atom, ammonium or a substituted ammonium ion; R.sub.1 is C.sub.1 -C.sub.4 alkyl substituted by one or more hydroxy or carboxyl groups; and p is an integer.The new compounds are useful in the treatment of aqueous systems, in particular to inhibit scale deposition from aqueous systems.

Abstract: A safety plug for preventing firearms from being surreptitiously loaded while on display in stores. The plug utilizes an O-ring that serves to firmly hold the safety plug in place. The use of an O-ring eliminates the need for high precision plug dimensions, permitting inexpensive mass production manufacturing techniques. The O-ring fits within a groove that is substantially wider than the thickness of the O-ring which prevents O-ring shearing. Once inserted, the safety plug is entirely within the firing chamber and thus does not interfere with the operating action of the firearm. The plug can only be removed by a cleaning rod inserted through the muzzle to force the plug out of the firing chamber. The use of translucent materials enables the firearm barrel to be inspected and acts as a diffuser to eliminate "hot spots" that commonly result during bore light inspections.

Abstract: The invention provides an explosively actuated switch and a method of using the same. The switch will include primary conductive elements which will remain generally stationary, and one or more movable conductive elements which will be clamped between the stationary elements. Various types of mechanisms may be utilized to exert a clamping force on one or more of the stationary members. An explosive material is provided to move the movable members from engagement with the stationary members upon detonation.

Abstract: An improvement in the process of incorporating a modifier ingredient into the surface region of a resinous article is described herein. The basic process includes immersing the article in a liquid such as water and contacting the immersed article with a solution of a modifier ingredient in a solvent which is immiscible with the liquid. The improvement herein comprises removing a substantial amount of air dissolved in the water layer to prevent droplets of solution from rising to the surface of the water layer during the process, thereby preventing solid modifier material from accumulating on the water surface.

Abstract: A primer is provided for use in detonating an explosive charge. The primer includes a rigid explosive-filled container which is fitted with an elongated neck. A bore in the neck extends into the explosive of the primer and provides accommodation for a firing device such as a detonator or fusecord. The primer is attached to a shock tube/wiring of a detonator or a fusecord with a fastener which is located at the end of the neck remote from the container and which is capable of supporting the entire weight of the primer. The container is preferably spherical and the neck is preferably formed from a plastics material which is molded with protrusions around which the fusecord/shock tube/wiring can be looped and with a griping device to hold them in place. The primers of the invention are particularly safe and efficacious in use.

Abstract: An electroacoustic transducer according to the invention comprises a stacking of annular plates (13) made of piezoelectric ceramics alternating with annular electrodes (14) and pressed by an axial prestressing stem (15). The contact faces between each plate and the adjacent ones are made of two flat parts (16a, 16b) whose surface is smaller than the maximum cross section, due to the chamfers (19a, 19b, 20a, 20b) which truncate the edges of each plate. One application is the construction of low frequency sonar transmitters. Referenced elements refer to FIG. 3.

Abstract: An acoustic signal transmitter for well logging tools and the like comprising a housing having a generally rectangular opening formed therein and defining a fluid filled cavity in which a compliant sheet transmitter member is disposed and is provided in a relaxed condition with a curvature. Opposite ends of the transmitter member are connected to piezoelectric actuators which are responsive to an electrical signal to elongate to stretch the sheet into a generally planar state to generate a pressure pulse in the cavity for transmission through a fluid filled borehole to a formation for, preferably, measuring the shear wave velocity in the formation material.

Abstract: A flextensional sonar transducer comprising a first cavity defined by an elliptical shell and end plates covering the two ends of the shell, vibration drive means inside the cavity and coupled between portions of the shell wall at opposite ends of the major axis of the shell, a further cavity connected to the first cavity and an opening between the two cavities for coupling the two cavities for the further cavity to affect the resonant frequency of the first.

Abstract: A corrosion inhibitor for aqueous systems containing ferrous and non-ferrous metallic surfaces comprising (a) hydroxyphosphonoacetic acid, or a water soluble salt thereof, and (b) an aminoalkylenephosphonic acid derivative, or a water soluble salt thereof.

Abstract: A unipolar, RZ, constant width pulse telemetry is achieved in the combinatorial set, or any desired subset of pulse sequences thereof. Each input datum W is in one-to-one correspondence with a particular pulse sequence and the correspondence of datum with pulse sequence and vice versa is implemented by any selected ordering of the pulse sequences of the combinatorial set together with a successive comparison of the magnitude of the datum with the cumulative combinatorial capacity of the set.

Abstract: In a firing mechanism for Gatling-type guns, separate safing and firing cams are located at a firing position coinciding with a notch in an annular safing ring against which cocking levers ride to maintain their firing pins in pre-cocked conditions. To safe the firing mechanism, the safing cam is positioned to bridge the notch and maintain the firing pins pre-cocked as they revolve through the firing position. When the mechanism is armed, a cocking ramp surface of the firing cam is then positioned to cam the cocking levers rearwardly, cocking their firing pins. Immediately thereafter, the cocking levers drop off a firing cam sear corner into the notch now exposed by the safing cam to successively fire off ammunition rounds.

Abstract: A modular electronic safe arm device (MESAD) (10) for arming and igniting an explosive is universal in application and employs a standard circuit architecture which uses application specific logic modules (12) and (14), a standard voltage control module (16), and standard high energy firing modules (18) and (20). In the preferred embodiment, the logic modules (12) and (14) are state machines using clocked sequential logic and having read-only-memories. The logic modules (12) and (14) generate dynamic arming signals at outputs (54) and (76) which cause the voltage control module (16) in conjunction with transformer (102), to convert a low voltage input (98) to a high voltage output (100). The high voltage output (100) is used to charge firing capacitors (112) and (138) in standard high energy firing modules (18) and (20). Logic module (14) generates two trigger signals at outputs (76) and (78) for activating the trigger modules (126) and (148).

Abstract: A method for producing a camshaft having a tubular steel shaft and a sintered cam piece joined to the shaft. The sintered cam piece has iron tetroxide film at its surface. The camshaft is produced by assembling a powder compact to the steel shaft to provide a camshaft assembly, sintering the assembly to provide an integral assembly, correcting bending to the assembly, annealing the assembly, grinding the cam piece and effecting vaporization treatment to the assembly at a temperature lower than the annealing temperature.

Abstract: A corrosion inhibitor formulation for oil and water systems which formulation is resistance to sludge formation and does not tend to stabilize oil/water emulsions when added to oil and water systems. The corrosion inhibitor include an imidazoline dissolved in an aromatic solvent, a 2-hydroxylakylcarboxylic acid such as glycolic acid and a glycol such as hexylene glycol. The imidazoline is preferably prepared from a long chain fatty acid and a polyamine in a molar ratio of about 1.5:1.

Abstract: A seismic signal receiving system is provided for use in boreholes to receive seismic waves in carrying out geophysical investigations. The system includes three pairs of opposed plates, each of the pairs of plates including oppositely facing outer surfaces for engagement with opposite sides of a borehole. A seismic receiver is mounted on the inner surface of each of the plates for receiving seismic signals. A double-acting, fluid-operated actuator selectively causes relative movement of the plates of the pairs of plates away from each other to provide expansion thereof so as to enable the plates to engage the walls of a borehole and selectively causes relative movement of the plates of the pairs of plates toward each other to provide retraction thereof so as to enable the system to be removed from a borehole. The pairs of plates each comprise a relatively long plate and a relatively short plate. An expandable linkage interconnects the long plates at the distal ends thereof.

Abstract: A sighting system for arming a gun mounted on a self-propelled platform. The system comprising a periscope with a collimator having a source of monochromatic light and a swivelling mirror, and in association therewith an auxiliary sighting system so devised that a reticle or spot is projected from the collimator simultaneously into the lines of sight of the gunner and the commander. The auxiliary sighting system comprises a first dichroic mirror or beam splitter facing the head mirror and a second dichroic mirror or beam splitter vertically removed from the first one so as to be located in the commander's field of vision; and means for transmitting light between these two dichroic mirrors or beam splitters.

Abstract: A cartridge feed mechanism of an automatic firearm is mounted pivotably on a drive housing. In the pivoted-up position, a coupling tongue 15 of the transmission shaft 9 of the cartridge feed mechanism engages with a coupling groove of a drive sleeve of the drive housing. The coupling tongue shall be prevented from rotating when the cartridge feed mechanism is pivoted down from the drive housing. For this purpose, a slide 16, which locks the transmission shaft 9 in a locking position and releases it in a releasing position, is mounted on the cartridge feed mechanism. Slide 16 is pressed by the drive housing into its releasing position when the cartridge feed mechanism is in the pivoted-up position. In the pivoted-down position of the cartridge feed mechanism, it is brought into its locking position by a compression spring.

Abstract: The invention relates to the technical field of chemical reaction.The apparatus of chemical reaction by wet process according to the invention is characterized in that the stack is at least partly constituted by a perforated envelope forming a barrier against the propagation of microwaves.The invention finds an application in mineralization.