Sewing apparatus, particularly adapted for sewing limp material, in which the material to be sewn is conveyed by a pair of perforated and spaced conveyor belts aligned in their direction of movement and riding on a pair of vacuum chambers which causes the material to press against the upper surfaces of the belts and to be maintained in correct position thereon. A needle driving mechanism located above the gap between the belts, a stitch anvil having a light reflecting tape on its upper surface a...

An operational amplifier bias system provides input offset voltage trim current with minimum offset thermal drift. The bias system includes a bias generator that provides bias current to the op amp. Correction circuitry responsive to the bias current provides an input offset trim current that compensates for offset drift error with change in temperature. The correction circuitry includes a resistive element, an input current mirror responsive to the bias current for providing a reference current...

A mannequin head useful for displaying wigs and the like, is disclosed. The subject mannequin head is constructed to include a frontal member and a foundation member, the former presenting a full replica of a human face, neck and upper chest portion of a human torso. The foundation member is sculptured to form a partial human head, a neck and an upper chest portion. When mated, the frontal and foundation members form a complete mannequin head that is realistically and naturally shaped and which ...

Polyphosphazene polymers are prepared which contain units represented by the formulas: ##STR1## wherein X is ##STR2## in which R is alkylene radical containing from 0 to 10 carbon atoms, R' is hydrogen or alkyl containing from 1 to 10 carbon atoms and n is an integer of from 0 to 10; wherein X' is X or is selected from the group consisting of substituted or unsubstituted alkoxy, aryloxy, amino and mercapto groups and wherein 20.ltoreq. (a+b+c).ltoreq.50,000 per polymer. The polymers of the inven...

Data from a plurality of communications is transmitted in a code division multiple access communication system. The transmitted communications are received. Gain factors are determined for at least one of the received communications. Data of the received communications is detected using a scaling factor derived from the determined gain values.

Poly(organophosphazenes) containing repeating units of the structure: ##STR1## wherein X and X' represent organic substituents which may be the same or different and n is from 20 to 50,000, are prepared by a process which involves reacting a poly(dichlorophosphazene) having the formula --(NPCl.sub.2).sub.n --, in which n is from 20 to 50,000, with an active hydrogen-containing compound in the presence of a bicyclic amidine represented by the structure: ##STR2## in which m is an integer of from 1...

The hydrocarbon fluid friction reducing properties of homopolymers of alpha-monoolefins having 6 to 30 carbon atoms or copolymers of two or more alpha-monoolefins having 2 to about 30 carbon atoms is improved by polymerizing the monomers in the liquid state by means of a titanium halide catalyst and a two-component activator system comprised of a dialkylaluminum halide compound and a dialkylaluminum alkoxide compound.

The present invention is an apparatus for regulating the amonut of oil, lubricant, or other type of lubricant applied to a surface of a work piece in order to reduce friction during a machining process. It comprises a primary reservoir, a needle valve, float assembly, a liquid drop control orifice, a sight for allowing visual confirmation of the flow rate, an atmospheric vent, an inlet for pressurized air, and a nozzle. The needle valve is slidably engaged into an orifice in the primary reservoi...

Cyclopentadienyl manganese tricarbonyl compounds are made by reacting a mixture of 0.25-0.55 moles of manganese acetate and 0.45-0.55 moles of a bis-cyclopentadienyl manganese compound with about 0.5-2.1 moles of an alkyl aluminum compound (e.g. triethyl aluminum) in the presence of about 0.75-1.25 moles of an ether per mole of said alkyl aluminum compound and reacting the mixture with carbon monoxide at about 65.degree.-175.degree. C. and 300-1500 psig.

An outdoor light fixture that has a cover with a clear pane and an inner refracting lens adapted to refract light emitted from a light source and to fit over the light source.