Direct bonded refractory bricks are provided containing 40 to 70 percent by weight magnesia, 60 to 30 percent by weight chrome ore, and having an overall lime to silica ratio less than 0.30 and a silica content of less than 2.5 percent by weight based on the weight of the brick. The silicate phase of the bricks is essentially non-wetting and non-reactive with secondary spinels at 2,700.degree.F. The lime to silica ratio and silica content are controlled by adding a hydrated silicate compound, su...

A cigarette or other tobacco smoke filter is disclosed which has a filamentary or fibrous cellulose acetate support carrying a stabilized mixture of zinc oxide and an alkali carbonate salt. The zinc oxide and the carbonate salt are dispersed in a plasticizer to form the stabilized mixture by a milling operation.

A tobacco-smoke filter comprises a tube of smoke-filtering sheet material, for example paper, extending longitudinally within and spaced radially from an outer tubular wrapper, for example an extruded smoke-impervious plastics material, the tube being blocked at both ends, while the space between the tube and the wrapper is blocked around complementary arcs at opposite ends and longitudinally in such manner that smoke entering at one end must pass through the wall of the tube twice before reachi...

A pneumatic tobacco feed system to cigarette making machines operates on a call-dump-fill and thereafter hold cycle. The system includes a discharger over each hopper of a making machine. The discharger is designed to contain a charge of tobacco while awaiting a low tobacco level call signal from the associated maker to dump this tobacco into the hopper. A pneumatically actuated air cylinder assembly operates to maintain the discharger door in a closed position until this signal is received. The...

A compact fuse designed to be armed after cessation of acceleration and pided with a plurality of safety means; a cap adapted to be set in an inoperative position by a rotation of 90.degree. with reference to the fuse body, a cover for the cap adapted to collapse towards the striker and to prevent its releasing operation in case of a premature impact, a detonator-carrier adapted to be shifted laterally out of registry with the striker, a weight controlled by inertia and controlling operation of ...

The present invention provides a touch control switch circuit capable of responding to coded touch inputs, i.e., touch inputs of different duration or particular sequences of touch inputs, to selectively control the operation of a load device. The touch control switch circuit is particularly useful for operating a household lighting fixture. The touch control switch circuit allows an operator to selectively control the intensity or timing of operation of the lighting fixture by applying predeter...

A smoking material comprises a tobacco component consisting of or comprising a combustible reconstituted tobacco, which smoking material contains a filler intimately incorporated therein and consisting solely or largely of zinc-oxide powder. Preferably the reconstituted tobacco consists solely or essentially of natural tobacco substances. The filler of zinc oxide is in powder form and of a particle less than 150 microns and constitutes between approximately 15-40 percent by weight of the tobacco...

A tobacco feeder is coupled to two multiple cigarette maker systems through two tubes, one for each system. The feeder is driven by a two-speed motor. When only one system requires tobacco, the feeder is driven at low speed, whereas it will be switched to the higher speed when both systems require tobacco simultaneously.

A system for the self-advancing construction of a conduit line, preferably one to receive a vehicular transportation. Construction proceeds without damage to the peripheral environs and without the necessity for additional trackway, roads or the like for material support. Materials are transported along an existing line to a self-driven assembly structure adjacent the forward end of the line. The assembly structure erects further line and then moves along to the new forward end for still further...

The invention relates to a smoking article comprising a rod of smoking material having two or more channels, for instance tubes, of small cross section extending substantially longitudinally of the rod from near the mouthend to points short of the other end, at least two of the said channels being of different lengths. The smoking article may have a smoke filter against which the channels substantially abut.