Abstract: A point-attack bit retained for rotation in a block bore, and used for removing material from a mine face. The bit has an elongate shank, and a head integral and coaxial with the shank, the head including a plurality of peripherally spaced, laterally projecting vanes extending generally longitudinally of the bit. Each vane is substantially triangular with a narrow leading end and a wider trailing end, and has sides that extend from the leading end to the trailing end. One of the vane sides has a different angle with respect to the longitudinal axis of the bit than the other vane side to provide different transverse forces on the vane sides upon contact with material being mined to effect a positive turning of the bit upon picking of the mine face.

Abstract: A cine camera for taking talking pictures, in which a film is moved intermittently past an image gate by a reciprocating traction claw and continuously past a recording head by a rotating capstan coacting with a pinch roller, includes a latch by which the pinch roller can be held spaced from the capstan in an inactive position. The latching of the pinch roller in this inactive position, against the force of a biasing spring providing the necessary contact pressure during filming, is accomplished upon deactivation of the film drive by the residual kinetic energy of an inertial mass such as a flywheel which is coupled with either the capstan drive or the claw drive. The latch is released upon actuation of a trigger, either directly or through the intermediary of the claw drive. The biasing spring may be part of a toggle mechanism tripped by a presetting member, such as a sensor detecting the presence of a sound-film cassette in the camera.

Abstract: A novel method of preparing the valuable compound 3-(3-carboxy-4-hydroxyphenyl)-4,5-dihydro-2-phenylbenz[e]indole is described, said compound possessing antiinflammatory and analgetic activity. Also described are novel intermediates useful in the disclosed method.

Abstract: Organotin compounds are prepared having (1) at least two tin atoms linked by a bridge through sulfur, carboxylate or both and containing at least two carbon atoms in the bridge, (2) directly attached to the tin atoms one to two alkyl groups containing one to eight carbon atoms and (3) a mercaptoalkanol or derivative thereof. The compounds are useful to stabilize halogen containing vinyl and vinylidene polymers, e.g. polyvinyl chloride.

Abstract: The compounds are of the heterocyclic class of 2-phenethylpiperidines having an amido substituent in the ortho position of the phenethyl moiety. Substituents in the ortho position include formamido, benzamido, cinnamamido, 2-thiophenecarboxamido, alkanesulfonamido and alkanoylamido. They are useful as antiarrhythmic and/or antiserotonin agents. The novel compounds are prepared by reaction of appropriately substituted o-aminophenethylpiperidines and the carbonyl or sulfonyl halides or anhydrides. Typical embodiments of this invention are 4-methoxy-2'-[2-(1-methyl-2-piperidyl)ethyl]benzanilide and 2'-[2-(1-methyl-2-piperidyl)ethyl]cinnamanilide.

Abstract: The compounds are of the heterocyclic class of 2-phenethylpiperidines having an amido substituent in the ortho position of the phenethyl moiety. Substituents in the ortho position include formamido, benzamido, cinnamamido, 2-thiophenecarboxamido, alkanesulfonamido and alkanoylamido. They are useful as antiarrhythmic and/or antiserotonin agents. The novel compounds are prepared by reaction of appropriately substituted o-aminophenethylpiperidines and the carbonyl or sulfonyl halides or anhydrides. Typical embodiments of this invention are 4-methoxy-2'-[2-(1-methyl-2-piperidyl)ethyl]benzanilide and 2'-[2-(1-methyl-2-piperidyl)ethyl]cinnamanilide.

Abstract: A working-time indicator that resets itself to a zero position as soon as the supervised work is interrupted for a predetermined, preferably adjustable minimum period of time but neglects all pauses of a shorter duration comprises, in combination, a first or working-time meter that is adapted to measure and indicate the duration of a single period or a succession of spaced periods between an arbitrary number of start and stop pulses received thereby, said first meter being resettable to a zero position by means of a resetting pulse, and a second or idling-time meter that is adapted to measure the period of time following immediately after each stop pulse to said first meter and to compare the length of each such period of idling with a preferably adjustable reference value, means being provided for automatically resetting said second meter to a zero position, if and when said first meter receives a new start pulse before the length of the period of idling has reached the reference value, and means being also

Abstract: Method of blasting rock to attain a predetermined fracture result. The necessary energy for the blasting is provided at an amount and in an application which is decided by calculating the stresses with regard to previously plotted blasting effects and to a previously prepared description of the rock structure.

Abstract: An improved Reactive Ion Etching (RIE) technique for preferentially etching polysilicon is described as is needed in Very Large Scale Integration (VLSI) using silicon technology. The etch gas is a mixture of carbon tetrafluoride (CF.sub.4) and chlorine (Cl.sub.2) diluted with inert gas. The pressure of the system is required to be in the range of about 10 to 500 milli Torr. This etch gas allows an RIE process which combines the very desirable features of selectivity (high polycrystalline silicon/monocrystalline silicon etch rate ratio) and directionality which creates substantially vertical sidewalls on the etched features.

Abstract: A mixture of isocyanate-terminated polyurethane prepolymer made from an aliphatic diisocyanate and an approximately stoichiometric amount of a curing aromatic diamine is stored at least -5.degree. to -25.degree. C. until needed. It then is reheated to about 80.degree.-120.degree. C., at which temperature it becomes fluid and pourable. Within this temperature range the mixture has a useful life of at least about 30 minutes. Large batches of prepolymer-curing agent mixture can be prepared using existing processing equipment and techniques, analyzed and stored, then reheated and used for casting of very large articles.

Abstract: Disclosed are combinations of lecithin and diacetyl tartaric acid esters of monoglycerides used in chocolate coating compositions to lower the viscosity thereof when in liquid form. Use of these substances does not adversely affect the physical properties such as gloss, softness, taste, etc.

Abstract: This invention concerns novel 3-[(3-alkylamino-2-hydroxypropoxy)phenyl]-1,2-propanediols of the formula: ##STR1## wherein R is selected from the group consisting of straight or branched-chain lower alkyls (C.sub.1 -C.sub.6) and cycloalkyls (C.sub.1 -C.sub.6); R.sub.1 and R.sub.2 are selected from the group consisting of hydrogen and 2,3-dihydroxypropyl, with the proviso that R.sub.1 and R.sub.2 may not be the same; and R.sub.3 is selected from the group consisting of lower alkyls (C.sub.1 -C.sub.4) and lower alkoxys (C.sub.1 -C.sub.4); and the acid addition salts thereof. These novel compounds are useful as antiarrhythmic agents and .beta.-andrenergic blockers in mammals.This invention also concerns novel compounds of the formula ##STR2## wherein R.sub.1 and R.sub.2 are selected from the group consisting of hydrogen and 2,3-dihydroxypropyl, with the proviso that R.sub.1 and R.sub.2 may not be the same; R.sub.3 is selected from the group consisting of lower alkyls (C.sub.1 -C.sub.4) and lower alkoxys (C.sub.

Abstract: Body protective clothing to be worn over or in place of outer garments for protection while actively participating in various sports is provided. A zippered vest-type garment including a resilient foam insert strategically located along the lower portion of the torso includes adjustable front closure straps for maintaining the position of the foam about the lower back and hip bones. A harness-type construction having crossed-adjustable shoulder straps and a closure belt portion also provides impact protection about the lower back and hip bones of the wearer. Stretch-type pants are provided with pockets in the regions of the hip and lower back for receiving foam pads when desired.

Abstract: A method for wearing and taking off a protective suit which is used when entering the inside of a working zone segregated from the outside thereof. The protective suit has a cylindrical portion made of a film-like fusible material and is designed so that one can get into or out of the suit by passing through the cylindrical portion. When wearing the protective suit, one gets into the suit by passing through the cylindrical portion, with the protective suit being kept joined to an entrance/exit section of the working zone, and then part of the cylindrical portion is fused and closed to segregate the inside of the suit from the outside thereof while sealing the entrance/exit section with a pouch-like member.

Abstract: This invention relates to an improved device for supporting arms. More particularly, this invention relates to an improved device to be worn by runners to support arms and to guide arm movements so as to increase running efficiency.