Abstract: A foot controller for dental instruments having a pair of foot pedals which are depressed to initiate and control the rate of flow of a utility service, there being a single, variable output generator with the controller which can be operated by either the independent or simultaneous operation of the foot pedals.

Abstract: In a foot control, two or more pivoted pedals have a common main spring which provides the same resistance to all pedals. A bias arrangement keeps one pedal from falling down if the other pedal is depressed. A bias arrangement may be a horizontal rod associated with each pedal. The rod is spring biased against the pedal at a location below the pivot axis.In a two pedal embodiment both pedals can control a single electrical element. A stud extends from each horizontal rod. The stud normally prevents a spring biased pivoted member from pivoting and actuating the electrical element. When a pedal is depressed, the corresponding rod and stud move to allow the pivoted member to actuate the electric element and a corresponding switch.

Abstract: Mutant microorganism, Pseudomonas putida CB-173 degrading phenolics, and at a temperature as low as, e.g., about 1.degree. to 4.degree. C., at a faster rate than known Pseudomonas putida type strains, and process for treating wastewater containing phenolics using the mutant microorganism strain Pseudomonas putida CB-173.

Abstract: A dental delivery unit carries a number of dental instruments in nests. Upon selection, one nest is extended carrying its instrument to the dentist's group. Selection is accomplished by a priority system. Associated with each nest is a switch. Activation of any switch starts a selection period by a priority system. At the end of the selection period the nest corresponding to the last to be activated switch is extended by the priority system.If two switches are activated together the nest corresponding to the furthermost switch is extended.

Abstract: A process for removing oleaginous materials containing those of animal origin from wastewater comprising treating wastewater containing oleaginous material with a microbial combination of:(a) a microorganism of the strain Pseudomonas aeruginosa mutant SGRR.sub.2 ; and(b) at least one of:(i) a microorganism of the genus Bacillus; and(ii) a microorganism of the genus Pseudomonas other than the strain Pseudomonas aeruginosa mutant SGRR.sub.2 ;and the microbial combination of:(a) a microorganism of the strain Pseudomonas aeruginosa mutant SGRR.sub.2 ; and(b) at least one of:(i) a microorganism of the genus Bacillus; and(ii) a microorganism of the genus Pseudomonas other than the strain Pseudomonas aeruginosa mutant SGRR.sub.2.

Abstract: A dental chair lift mechanism employing a parallelogram lift has a linkage arrangement which offsets the horizontal component of motion produced by the parallelogram lift so that the seat of the dental chair can be elevated in a substantially straight vertical path.

Abstract: Disclosed is a method and apparatus for forming indicia on the outside of a roto-molded plastic container during the roto-molding process wherein a template bearing a mirror image of the indicia is removably affixed to the interior wall surface of a mold.

Abstract: A legrest for a dental chair has a telescopically nested section. A cable and pulley system automatically extends the nested section from the legrest as the legrest is moved from a generally vertical position to a generally horizontal position. Bias springs return the section to its nested position as the legrest moves back towards its near vertical position.

Abstract: An adjustable headrest for a dental chair having one lock for holding the headrest at an articulated position and a second lock for holding the headrest at an adjusted longitudinal position with respect to the backrest of the chair. The invention is a one hand operated lock release for operating both locks. The release can be constructed so that manipulation of a single member can accomplish sequential, independent or simultaneous operation of both locks.

Abstract: A dental cabinet, suitable for sit down dentistry, which is made by assemblying three cabinet sections. Each cabinet section has internal spaces which are in open communication with the internal spaces of the other cabinet sections. This allows the free passage of utility lines from one cabinet section to another and also permits easy access to the utility lines for installation and repair. The cabinet also can be assembled in place against a wall surface or as a free standing cabinet without the need for utility line excess openings in the walls or back of the cabinet.

Abstract: A device for monitoring a component in a fluid mixture includes a tube 1, the bore of which is divided into two chambers by a disc of solid electrolyte 1a. The electrolyte is chosen to have a conducting ion related to the component to be measured. Suspension device in the form of two resilient diaphragms 7 suspend the tube within a housing including a frame member 16 and end caps 15. Each of the diaphragms is sealed at its interface 9 with the housing, and at its interface 6 with an end of the tube. Heater 10, 11 are provided to alter the temperature of the component in each chamber and inlet 21 and outlet 22 allow fluid to enter and leave the chambers.The e.m.f. between electrodes 2 is monitored and information about the fluid mixture can be obtained depending on the temperature of the mixture sensed by a thermocouple arrangement 3.

Abstract: A furnace having an easily disassembled vacuum chamber to facilitate muffle replacement. The muffle is located over pins on the vacuum chamber base and is held against the base by a leaf spring between the muffle and the vacuum chamber top. The cylindrical wall of the vacuum chamber is correctly located with respect to the muffle by upright spacer bars upstanding from the vacuum chamber base about the periphery of the cylindrical wall. The spacer bars further serve to tie the top and base of the vacuum chamber together and against the cylindrical wall. The furnace is bottom loaded and has a door seal carried by the base so that the seal is not exposed to the direct heat from the muffle when the door is opened.

Abstract: Steel alloys having improved mechanical properties and improved ambient and low temperature toughness following the repeated thermal exposures necessary to fuse and bond ceramic or glass coatings thereto have been prepared. Phase transformation temperatures are controlled by a critical combination of manganese, silicon, and optionally, nickel, in a steel alloy of silicon, carbon, aluminum, titanium and/or niobium, phosphorus, sulfur and iron. The resulting steel alloys have good glassability, and even after glassing demonstrate excellent yield strength, ultimate tensile strength and impact strength at both ambient and low temperatures (-20.degree. F.).

Abstract: Disclosed is a method and apparatus for forming indicia on the outside of a roto-molded plastic container during the roto-molding process wherein a template bearing a mirror image of the indicia is removably affixed to the interior wall surface of a mold.

Abstract: A process for degrading and removing anionic and/or non-ionic surface active agents, detergents and the like from wastewater containing the same comprising treating wastewater containing the anionic and/or non-ionic surface active agents, detergents and like compounds with a novel microbial strain of Pseudomonas fluorescens under aerobic conditions; and the novel microorganism of the strain Pseudomonas fluorescens.

Abstract: Cabinet drawers are supported by members projecting from the sides of the drawers into slots defined by guide rails at the sides of the cabinet. Notches in the guide rails permit the drawers to pivot into an inclined position when the drawers are opened. This makes objects within the drawers more visible and accessible.

Abstract: A separable blade agitator has a glass coated drive shaft and a glass coated impeller interference fitted to the end of the shaft in a gasketless, glass surface to glass surface joint. The interference fitting of the impeller to the shaft is accomplished by super cooling the end of the shaft with nitrogen or the like so that it can be inserted into a glass coated bore in the impeller.

Abstract: A method of manufacturing glass-lined tube. An undercoat of glass is fused onto the surfaces of nozzle-shaped flange-pieces, from their outer peripheral edges to their molded and curved inner faces, welding flange components then welded to either end of the metal tube to form a complete flange at each end. The inner faces of the weld zones are then shaped by grinding and polishing. A glass tube that is greater in length than the metal tube is fitted loosely into the latter tube. The glass tube is supported at either end within the wells of conical caps which are fitted around the flanges by air-permeable spacer-rings, with the ends of the glass tube extending beyond the outward faces of the flange joints and with the glass tube being securely positioned at the center line of the metal tube.