A power and free conveyor system having a plurality of carriers which circulate on a carrier supporting track from a loading station to an unloading station and return, each carrier having a driving dog releasably engageable by one of a plurality of pushers of a propelling member supported on an adjacent track. Along the forwarding portion of the system extending from the loading station to the unloading station, the carriers are employed in pairs, each pair comprising a forward carrier and a re...

A free-standing package of the blister type includes an article containing enclosure formed of a single piece of self-supporting plastic material. The enclosure is in two mating sections integrally joined along a fold line traversing what becomes the base of the completed package. The free edges of the sections have flanges which meet when the sections are closed to envelop the article and the sections are sealed together along the flanges. At the same time, the initially folded base portion is ...

An astable free-running multivibrator for generating square wave pulses for an electrical discharge machining power supply. A pair of electronic control devices are biased for alternate operation, and a pair of resistance-capacitance networks are operatively connected to the control element of one of the electronic control devices. Means are operatively connected to the multivibrator for independently varying the interpulse period and the pulse width of the series of square wave pulses. The puls...

A free piston engine is provided which has a pair of opposed piston units mounted for reciprocation in a cylindrical sleeve. The engine has a large combustion chamber between the piston units and a small combustion chamber at each end of the sleeve. The arrangement provides for compression within the large chamber as a result of the simultaneous firing of explosive charges within the small chambers and, conversly, compression within the small chambers as a result of the firing of an explosive ch...

An incinerator has a first combustion chamber which receives the waste to be incinerated. An ignition-burner is provided in the first chamber to ignite the waste; the burner automatically turns off at waste incineration temperature. Burning of the refuse is accomplished in three zones, each zone being provided with proper temperature and a supply of regulated air at low velocity by means of natural aspiration, controlled by thermal feedback wherein the changing of the refuse fire changes the hea...

A ventilating hood has an ascending exhaust duct equipped with a series of air cleaning and purifying instrumentalities for removing grease, smoke and fumes generated by cooking equipment. Air rising through the duct passes successively through a grease extractor, an electrostatic precipitator, an activated charcoal filter and a deodorizing chemical spray. The grease extractor and precipitator are provided with hot water and detergent washing sprays. The hood has hollow walls containing air supp...

A free turbine pump for a well including: an axial flow turbine and an axial flow pump interconnected in axially aligned, end-to-end relation with the turbine above the pump, the turbine having a power fluid intake adjacent its lower end and having a power fluid exhaust adjacent its upper end for spent power fluid, the pump having a well fluid inlet adjacent its lower end, and having a production fluid outlet adjacent its upper end and adjacent the power fluid intake; and means between the power...

The typewriter includes a cylindrical platen having free ends and held in position by a plurality of rollers disposed at circumferential positions about the platen, with the position of each roller being, with respect to the circumference of the platen, less than 180.degree. from the next roller, and one of the rollers being shiftable away from the platen and retainable in its shifted position, to provide a space between the shifted roller and an adjacent roller greater than the diameter of the ...

A presensitized, light-sensitive article capable of providing a lithographic printing plate requiring only image-wise exposure to actinic light and no subsequent image development is provided. The article is comprised of a support coated with a hydrophilic composition comprised of: 1) an organic solvent-soluble phenolic resin, and 2) a hydroxyethylcellulose ether, and in reactive association therewith a photoinitiator capable of generating free radicals on exposure to actinic light. Upon imagewi...

A centrally free giant bearing for absorbing axial and radial loads as well as loads caused by moments, in which a protrusion of a nose ring is embraced on three sides by a two-sectional supporting ring which at its bearing surfaces is provided with circumferentially distributed controllable electromagnets, whereas the nose ring is provided with circumferentially distributed non-variable electromagnets.