Abstract:
The tool comprises between a barrel and a breech, a rotating loader disc provided with orifices for receiving propellant charges. Between these charge-receiving orifices there are orifices for inhibiting the sympathetic ignition of the adjacent charges.
Abstract:
A power actuated tool comprising an expansion chamber for the combustion gases of a piece of ammunition placed in a combustion chamber.In the tool at least one substantially radial through hole is provided in the wall of the expansion chamber or of the combustion chamber and a bush which moves relative to the chamber is provided so as to be able to more or less completely expose the hole.
Abstract:
The device comprises on the front end portion of the plunger or piston a retaining ring mounted in the barrel with the interpositioning of a joint in such a way that the bore of the ring is slightly off-center relative to the piston axis when the joint is not deformed.
Abstract:
In order to remove the methanesulphonyl chloride entrained by the gaseous HCl by-product, an amount of water ranging from 0.01 to 20%, relative to the mass of HCl to be treated, is injected into the HCl gas flow and the temperature is lowered to a value below or equal to 15° C.
Abstract:
The invention relates to the preparation of alkanesulphonic acids by photooxidation of sulphur-containing derivatives (thiols, sulphides, disulphides).The operation is carried out in solution in aqueous or alcoholic acetonitrile, with a light source irradiating between 200 and 400 nm.
Abstract:
A temporary road sign component or the like, comprising a panel integral with a stand for standing on the ground, with its base including at least two lengths of tube orthogonal to the panel and directed to rest on the ground via respective generator lines, and suitable for receiving substantially cylindrical ballasting pieces therein.
Abstract:
A cone expansion wall plug is provided comprising a threaded rod, an expansible socket, an expansion cone, an intermediate ring and a spacer between the head of the rod and said intermediate ring. During expansion and anchorage of the socket by the cone, the ring and the spacer prevent movement of the socket with respect to the rod. After anchorage, the rod may be screwed into the cone by shearing a collar of the spacer. During expansion, the socket only bears against the intermediate ring through a radial shoulder.
Abstract:
A fixing peg is provided comprising a body and a bearing washer for fixing an insulating panel. The body is tubular, with a support portion and an anchorage portion and is split over the whole of its length. In the anchorage portion two abutment tongues project from the lips of the slit, against which tongues the lips come into abutment during anchorage for increasing the anchorage pressure.
Abstract:
Improvement in the photoinitiated synthesis of mercaptans, in which an ethylenic compound is treated with hydrogen sulphide, preferably under pressure, in the presence of ultraviolet radiation and a photoinitiator involves the use of a xanthenic compound, possibly substituted, as the initiator. Preferably, the xanthenic compounds is employed in conjunction with an organic compound of an element of Group V A of the Periodic Classification of the Elements.
Abstract:
The piston return mechanism for a powder actuated piston-type fastener driving tool utilizes a tilting muzzle bushing to engage the fastener driving face of the piston. After the piston has been driven, the muzzle bushing is displaced manually forwardly, by means of a slide, until the muzzle bushing tilts to a position where it can contact the fastener driving face of the piston. The muzzle bushing is then returned breechwardly, pushing the piston in front of it back into the barrel bore to a driving position. When the driving position of the piston is reached, the muzzle bushing cams out of the tilted position into a position where it is coaxial with the piston.