Abstract: A self-stabilizing intra-oral saliva evacuator insertable astride the mandibular and maxillary arches to hold the oral cavity open and to maintain the upper and lower molars dry and isolated from contact with the lingual and buccal tissues so long as the evacuator is in place. The semi resilient tempered main body is supported solely by the teeth and a major portion thereof is embraced by flexible tubing connected to evacuating facilities and is provided with strategically located orifices to remove saliva and maintain a particularly copious flow of ambient drying air over the adjacent dental surfaces. The two-part main body, though a permanent assembly, can be readily adjusted to accommodate a range of different oral cavity configurations.

Abstract: A power recovery separator for processing huge volumes of high temperature pressurized dirty gas en route to a high temperature gas expander. The separator has a single housing sub-divided into overhead, inlet and underflow chambers by a pair of flanged and dished heads of erosion and heat resistant material having a higher coefficient of expansion than the housing material. A multiplicity of inertial separators are supported in parallel between the dished heads and secured to only one thereof. At least portions of the head flanges bear radially against the interior of the housing sidewalls and their rim edges are welded to the housing and, in consequence, expansion of the head serves, in part, to augment the bulge and, in part, to place the high strength housing wall in hoop tension without subjecting the welding to rupture stresses.

Abstract: A knock-down invalid bed having a main frame supported at its ends by head boards and separable into two halves at its mid-length. Attached to each half are pivoting sections of a pair of tubular mattress-supporting subframes adjustable to support a patient horizontally and in different angular positions. The subframes support two link fabric units separably interconnected crosswise of the mid-length of the bed. Attached to the head board and overlying one end of the bed is a patient helper device to aid the patient in shifting his position in bed, and other useful functions.

Abstract: A gang tape dispenser for a multiplicity of dissimilar rolls of pressure sensitive tape selectively usable at the user's option. Each roll may bear a roll of distinctive symbols dissimilar from those on the other rolls enabling the user to employ strips alone or in any of a profusion of combinations for coding and identifying and the like purposes. The tape rolls are housed in aligned storage cells having dispensing ports facing a common severing blade. The dispenser can be bench mounted or suspended on a workman's belt.

Abstract: The invention is directed to a method of making crystalline calcium ascorbate by reacting ascorbic acid and calcium carbonate in liquid water medium, using some excess of carbonate, at a temperature of not more than about 70.degree. C., under controlled conditions so that the reaction mixture is maintained saturated with carbon dioxide gas and a carbon dioxide foam blanket is maintained over the reaction mixture during the reaction time, said water being present in the reactor in an amount which provides a reaction product solution having a syrupy viscosity, and spontaneously crystallizing out of said syrup a mass consisting essentially of calcium ascorbate, which calcium ascorbate is a source of Vitamin C activity.

Abstract: Stringing block threading apparatus for use in uncoupling a junction in a conductor hauling line and inserting a threading loop therein previously assembled through the throat of a stringing block. The hauling line is advanced along power line towers by a helicopter and the advance sections of this line are separably joined by a double ended coupling. This coupling is deposited into the threading apparatus atop each tower where it is automatically disconnected from the hauling line allowing enlargements on the released section ends to separate and become trapped in respective mating couplings at the opposite ends of the threading loop and the leading one of which is of the same double ended construction as the one deposited in the threading apparatus by helicopter. This coupling is deposited in the next threading apparatus for a repeat threading operation.

Abstract: A picture frame and method of making the same from a rising tube of fluent extruded plastic. The rising tube collapses inwardly to form the frame body as a ring of interfolded wrinkly sinuous corrugations. A stepped annular ring on the face of the extruder die is shaped to form a flat back for the frame along with a rabbeted inner rim edge suitable to seat a picture, mat and a backing plate.

Abstract: A universal digital converter for drafting machines operable to sense and instantly display numerically on one of the machine scales incremental linear or angular movements thereof. A sensor mounted on the scale has a wheel in rolling contact with the drafting surface and generates signals proportional to the net distance moved in a selected direction and these signals are processed electronically to represent the distance travelled in any desired preselected scale ratio. The sensor is quickly positionable to measure movements of either the horizontal or vertical scales, as well as angular movements of the protractor ring of a standard drafting machine.

Abstract: A cryogenic device utilizing pressurized coolant gas and provided with a single control easily manipulatable by finger pressure to selectively furnish either continuous freezing or continuous thawing, each alone or in sequence. The expansion chamber is pressurized only when the control lever is deliberately held depressed and, in consequence, either the expansion chamber or the coolant inlet subassembly can be detached or exchanged without risk to the operator or the equipment and without need for closing off the coolant supply. A pressure regulator forming a part of the device limits the maximum possible pressure in the expansion chamber and exhaust passages to a safe value. The device is substantially noiseless in operation and the control is operable through first and second stages by movement in the same direction to provide freezing or warming modes at the user's option and is self-locking in the freezing mode but is automatically disengaged therefrom upon movement into the thawing mode.

Abstract: A motor coach the major portion of the interior which comprises businessman's conference and sales promotion room occupying the rear end of the coach and much of its length and the remainder of which includes living facilities for the driver. The rear end of the coach comprises transparent panels one of which slides to provide an entrance. A protective device covers the exterior of these panels when the display room is not in use and shifts to a horizontal position at other times to provide an access for the entrance.

Abstract: A separable coupling for plastic tubing comprising a pair of plastic collars sized to form a high strength bonded interference fit with the ends of plastic tubing. A pliant elastomeric sleeve encircles and bridges the two collars and includes ribs internesting with grooves formed encircling the exterior of the collars. Clamping bands assembled about the sleeve bridging the two collars separably interlock the components together in a fluid-tight manner.

Abstract: A method of making footwear having an upper the lower edge of which is embedded in a sole of elastomeric composition compounded to set in a mold cavity at room temperature and pressure. The upper comprises a loop of elastic fabric stretched to embrace the perimeter of a male mold with one edge curled inwardly and impaled over pointed pins supported on a male mold and some of which pins act to hold the two mold members properly spaced apart while the elastomer cures.

Abstract: A picture phonograph record and method of making the same having an imprinted core sheet sandwiched between transparent layers one of which comprises a relatively thin preformed plastic foil and the other of which is a relatively rigid and thick layer dispersed radially over the core sheet from a hot fluent lump of plastic positioned between heated pressurized mold platens. Sound tracks are impressed onto the face of one or both plastic layers concurrently with the extrusion of the lump to form the thick plastic layer. At least the thicker and usually both layers become inseparably adherent to the adjacent face of the core sheet as an incident of the assembly and sound track impressing operation.

Abstract: A high temperature furnace having an access opening and a thick-walled heat resistant lining comprising at least one homogeneous tubular member of multiple generally-tubular layers of vacuum deposited refractory fibers. Larger furnaces utilize two or more liner tubes in end-to-end abutment. The abutting ends may be rabbeted and internested to assure a heat barrier.

Abstract: A method of making thick-walled heat insulation modules by vacuum accreting ceramic fibers from an aqueous solution onto a mold and the product provided thereby. The dimensionally stable generally rigid modules have a thickness of 3"-8" and a density of 10-12 lbs. per cubic foot and are readily subdivided and/or tailored if desired for overlapping intermeshing assembly to provide a continuous lining for a high temperature chamber withstanding operating temperatures between 1600.degree. and 3,000.degree. F.

Abstract: A knock-down invalid bed having a main frame supported at its ends by head boards and separable into two halves at its midlength. Attached to each half are pivoting sections of a pair of tubular mattress-supporting subframes adjustable to support a patient horizontally and in different angular positions. The subframes support two link fabric units separably interconnected crosswise of the midlength of the bed. Attached to the head board and overlying one end of the bed is a patient helper device to aid the patient in shifting his position in bed, and other useful functions.

Abstract: A sandal having a multi-layer sole including an insole of mini-cell foam which takes a set conforming to the sole of the wearer's foot. A pair of straps have their remote ends anchored to the opposite sides of the sole assembly with portions of each looped about the foot and freely movable lengthwise of a pair of passages traversing the sole assembly interiorly of its shank portion to the extent necessary to grip the foot comfortably when the adjacent free ends of the straps are secured together in any selected overlapped relation.

Abstract: A shearing tool for synthetic resin tubes, in which a lower jaw is connected to the leading end of an upper handle portion, a lower handle portion is pivoted to said lower jaw at its leading end, an opening is provided in forward portion of said upper handle portion extending therefrom to the leading end of said lower jaw, an arcuate tube receiving recess is provided in the upper surface of said lower jaw, said shearing blade is pivoted in an intermediate position of the length to said upper handle portion within said opening, said shearing blade is provided at the rear and lower end with an engaging pawl, a rocking bar having notches in the upper surface is pivoted at one end to the leading end of a lower handle portion, a slot is provided in the rear portion of said shearing blade, a connection link has at one end a pin freely received within said slot and is pivoted at the other end to an intermediate position of the length of said rocking bar, a spring is provided for urging said rocking bar against said