A correlator comprising a set of multivibrators which are serially connected to form a shift register, each multivibrator having a set and a reset output lead, indicating its binary state. Each multivibrator is connectable to a clocking source for shifting the states of the multivibrators. One of the multivibrators at one end of the series, the input multivibrator, is connectable to a source of signals, generally bilevel signals or pulses, each pulse having a predetermined time duration or a mul...

An electroacoustic transducer including a drive coil mounted within the airgap of an annular permanent magnet. The drive coil is connected to the transducer case which in turn is attached to a suitable support structure such as a wall or ceiling. Electrical signals within the drive coil cause it to move, and this vibration is transmitted to the support structure which then acts as a sounding surface for the transducer.

A method is described for preheating coke in a calcining process to a temperature between about 600.degree. to 850.degree. F. This preheating avoids shattering of the coke into undesirable small particles in the calcining kiln. The hot combustion gases from the kiln are admixed with air to burn all volatile combustible material contained in the gases and a portion of the resultant hot gases is admixed with cooler recycle gas from the preheater to obtain a heating gas for the preheater having a t...

A divider strip and method of using same which facilitates the provision of seam areas in terrazzo type flooring structures. The divider strip comprises an elongated thin, generally U-shaped body portion including an outwardly extending mounting flange at the distal end of at least one leg of the U. A resilient plastic material is received in the channel area defined by the body portion for maintaining the shape of the strip and for keeping foreign material from entering thereinto during the flo...

A modular boiler having a cylindrical combustion chamber made of three modules and a module comprising a cover and a module comprising an expansion vessel mounted coaxially on the boiler adjacent the combustion chamber at opposite ends thereof. The cover has a frustro-conical configuration with the inner walls thereof diverging from an opening in the cover toward the interior of the combustion chamber at an angle of between 15.degree. and 55.degree.. The combustion chamber is formed of three cas...

A process for the epoxidation of ethylenically unsaturated compounds with organic hydroperoxides using metal-free phthalocyanines or metal phthalocyanines as catalysts. Suitable metals include those of the metals Ni, Cu, Ag, Ti, V, Zr, Mo. Re, or U.

A method for printing using a pyroelectric material. A potentially pyroelectric material, whose dipoles can be oriented, is selectively and permanently poled to form a permanent pattern which corresponds to a graphic representation. The permanently, selectively poled material is heated or cooled, thereby forming a charge pattern corresponding to the graphic representation and toner powder placed on the material to form a pattern which can be transferred to a sheet of paper and fused thereto to f...

The invention relates to keyboard devices using optical switching and includes novel light distribution means to multiple fiber optics, switching means between fiber optics, and collection means from multiple fiber optics to a single point.

A process for producing indamine by condensing 2,6-diamino pyridine on a paraphenylene diamine or a benzoquinone diimine or a paranitroso N,N-dialkyl aniline. The resulting indamine can be incorporated into a dye composition for keratinic fibers, especially human hair.

This specification discloses a camera provided with a means for holding a film magazine in a predetermined position within the camera body. The holder means has a resilient engaging member which is engageable with at least a portion of the magazine housing to impart a holding pressure force to the magazine in the direction in which the magazine is inserted, thereby holding the magazine in a predetermined position within the camera. The holder means is provided on the camera body and can perform ...