Abstract: A channel selection mechanism for an electronic tuner of a television receiver comprises a motor-driven shaft, a voltage selection rotary switch with the contact arm mounted on the shaft, a channel number indicating drum mounted on the shaft for rotation with the rotary switch, a cam wheel having notches on the periphery thereof and mounted on the shaft for rotation with the rotary switch and the drum, and a cam follower pivoted at one end to engage the working surface of the cam wheel to provide swivel movements. The motor is energized by a motor start switch which is operated until a desired channel is reached. A motor stop switch is provided to operate in response to the swivel movements of the cam follower to deenergize the motor to precisely align the channel indicating number to a window provided in the receiver housing.

Abstract: A relatively large field of view is scanned to derive an indication of a point source, optical energy emitter being in the field of view, without recognizing relatively large, non-point emitters in the field of view. Each detector in an array of linearly, arranged point source detectors generates an output current in response to the energy irradiating it. The detectors have slightly displaced, narrow fields of view which are scanned so that the field of view of each detector traces a relatively narrow, substantially straight line path across the large field of view. The paths traced by a pair of detectors are substantially parallel and close enough to each other to enable the images of large targets to be indicated as undulations having approximately the same wave shape at substantially the same time positions at the outputs of the pair of detectors.

Abstract: Substantially fluoride-free phosphoric acid is produced by the acidulation of phosphate rock with sulfuric acid wherein the acidulation reaction is conducted in the presence of added potassium as K.sub.2 O bearing compounds, e.g. KHSO.sub.4, K.sub.2 SO.sub.4, KH.sub.2 PO.sub.4 or KOH, and additional silica, to precipitate fluorides and silica as potassium silicofluoride and then removed on separation of the gypsum formed. Optionally, additional silica may be added to the phosphoric acid solution recovered after precipitation and removal of the gypsum, to precipitate additional fluoride as potassium silicofluoride to further purify the phosphoric acid. In a further embodiment sufficient potassium may be added along with additional silica in the acidulation step to produce potassium dihydrogen phosphate and phosphoric acid as additional products.

Abstract: An immunoassay for the polypeptidic thymic hormone thymopoietin (thymin) is described. Determination of thymopoietin levels in biological fluids provides a useful diagnostic test for myasthenia gravis (elevated levels), immune deficiency diseases (reduced levels), immunologically mediated diseases such as rheumatoid arthritis, systemic lupus erythematosus and allergy (reduced levels) cancer (reduced levels), malnutrition (reduced levels) and infections (reduced levels). The present assay is also useful as a monitor of the effectiveness of therapy in each of the aforementioned types of disease states.

Abstract: A food comminuting device comprises a bowl type receptacle in combination with a comminuting appliance designed to engage and fit over the open mouth of the bowl. The comminuting appliance has a frame which carries a plurality of comminuting units having different comminuting characteristics which can selectively be moved and brought into use in a predetermined operative working position such that the fragments of comminuted food fall freely into the bowl. The frame also provides a protective guard shielding at least the comminuting unit or units not in use thereby reducing risk of accidental contact of the latter with the user of the device, and guide means for guiding food bodies manually reciprocated in engagement with a selected comminuting unit in the operative working position.

Abstract: A first annular member provided with at least two different shaped conductive spring arms is fixedly and coaxially connected to a rotatable member for rotatable movement therewith the two spring arms having different characteristic frequencies respectively. A second annular member provided with an annular conductive rail is connected to a relatively stationary member so as to be coaxially spaced apart from the first annular member. The free ends of the conductive spring arms are urged into sliding contact with the annular conductive rail.

Abstract: Production of White Oils of sufficient purity to pass the Hot Acid Carbonizable Substances Test and Ultraviolet Absorbance Test is carried out in two stages utilizing lubricating oil feedstock of a broad range of viscosities. The first stage hydrogenation utilizes a sulfur-resistant catalyst which produces an intermediate product of lower viscosity than the starting feedstock. The second stage hydrogenation catalyst is nickel on alumina and is further characterized as having a BET surface area in the range of 130-190 m.sup.2 /g. SUBACKGROUND OF THE INVENTION1. FIELD OF THE INVENTIONThis invention relates to a method for the production of highly refined oils called white oils from petroleum products, and more particularly to a novel two step process to produce white oils of pharmaceutical grade which will pass the Hot Acid Carbonizable Substances Test and Ultraviolet Absorbance Test.2.

Abstract: This invention relates to a liquid applicator for applying a cleaning liquid. The applicator comprises a bottle, a container within the neck of the bottle containing a pad of polyurethane foam and a support structure which is attached to the body. A covering of woven synthetic material is welded to the support structure and is substantially unsupported over its main portion. The cleaning liquid passes through the foam material which causes it to froth and the frothed liquid passes in turn through the woven synthetic material to be applied easily to the material to be cleaned.

Abstract: The invention relates to novel thermochromic spiro heterocyclic compounds having one or the other of the following formulae: ##STR1## where R.sub.1 denotes hydrogen atoms or one or more electron-donor groups in positions 5, 6, 7 and 8 in formula (1); R.sub.i ' denotes hydrogen atoms or one or more electron-donor or electron-acceptor groups in positions 4', 5', 6' and 7' and 4", 5", 6" and 7" in formulae (1) and (2); and R.sub.j denotes hydrogen atoms or one or more electron-donor groups in positions 5, 6, 7, 8, 9 and 10 in formula (2). Use in thermographic recording material.

Abstract: An adjustable mounting for a dial gauge is provided with provision for fine adjustment through a rotating sleeve having an inclined end face bearing against the adjacent end of a mounting member on the support stem for the gauge. A bridging piece extending radially outward from the stem engages the inclined face and a spring urges the sleeve against the bridging member. The mounting member is held on the stem by a pivot pin extending transversely through the stem. Additional positioning adjustment is provided by a knuckle assembly with a spring between the support stem and a main support pillar with a single operating locking screw.

Abstract: A first air-warming chamber partially surrounds a second air-warming chamber, which is disposed about an exhaust pipe. Air is passed through the first then second chambers in a zigzag flow path. The prewarmed air entering the second chamber is further heated to a desired level.

Abstract: In a hosiery handling apparatus wherein a string of hosiery is placed on a movable hollow tubular form, and everted through the open end of the form, a reciprocating arm grasps the first in-line hose and breaks it away from the string. The arm then pulls the hose across the top of a horizontal platform to a predetermined, fixed location on the platform. During the pulling operation, frictional resistance (drag) between the hose and platform tends to straighten the hose. An upstanding guide member, formed on the platform, prevents the hose from moving laterally off the platform. After the hose is located on the platform, the platform is tilted downwardly to dump the hose into a neat stack in a tray located beneath the platform. This readies the hose for a subsequent seaming operation.

Abstract: Air-fuel mixture control apparatus for a carbureted internal combustion engine having air bleed and fuel supply passages comprises a detector for sensing pre-combustion data such as engine operating parameters and an exhaust gas sensor for providing post-combustion data. The pre-combustion data is used to control the fuel flow rate, while the post-combustion data controls the passage of air through the air bleed. The pre-combustion data minimize the delay from the instant of disturbance to the engine to the instant at which a response is observed.

Abstract: Potassium sulfate (K.sub.2 SO.sub.4) is prepared by reaction of potassium chloride and sulfuric acid in an aqueous medium by initially removing evolved HCl in the gaseous form at temperatures of about 65.degree.-120.degree. C., then removing the remaining HCl as an HCl/water azeotrope at temperatures of about 90.degree. to 110.degree. C., restoring to the reaction mixture the amount of water removed with the azeotrope, and permitting the potassium sulfate to crystallize from the solution.

Abstract: The device comprises a head portion having a cutting edge with a pair of lever members mounted on opposing sides of the head portion. The lever members are pivotally mounted at one end thereof to move in a crossed relationship with respect to each other and to swing the outer end thereof from a resting position outwardly with respect to the head portion. The outer end of each lever member has a structural configuration effective to cause the swinging movement of the lever members upon contact with the object to be split. The outer end of each lever member contacts the object immediately after the cutting edge contacts the object. The lever members are effective to provide forces via their end portions against opposing sides of a cut formed by the cutting edge and thereby enhance splitting of the object against which the cutting edge has been thrust. The lever members are pivotally mounted to bosses directly attached to the head portion.

Abstract: A method for preventing web rewetting in a paper making machine of the type comprising a forming cylinder with an apertured or perforated periphery, with or without a foraminous belt wrapped around the cylinder, on which cylinder there is formed, during rotation of the cylinder, a paper web by a pressure slice to which paper slurry or stock is supplied, the paper web remaining on the periphery of the cylinder or belt over a major portion thereof, while water is drawn from the web by means of one or more suction boxes located within the cylinder and extending from the pressure slice to a transfer zone where the web is transferred from the cylinder or belt onto a felt or wire cloth for subsequent processing. In the remainder of the paper making machine there is provided a suction box extending over an arc from said web transfer zone to the area of said pressure slice to prevent rewetting of the withdrawn web.

Abstract: An aqueous slurry of CaHPO.sub.4.2H.sub.2 O in a 5-20 Wt% concentration is prepared by the use of the phosphate dihydrate obtained by reaction of NaNH.sub.4 HPO.sub.4.4H.sub.2 O with CaCl.sub.2 in water. After adjustment of the pH of the slurry to 4.5-5.5, the slurry is rapidly heated to 85.degree.-97.degree. C by contact with steam to convert the dihydrate to the anhydride, which is suitable for use in the preparation of fluorescent materials due to its high purity, platy and square crystal shape and uniform particle size.

Abstract: The device holds articles on a sloping roof and comprises a holding portion and an attaching portion. The holding portion has a structural configuration to contain the articles and the attaching portion is effective to fit between successive courses of roofing shingles fixed on the sloping roof. The attaching portion includes a bent end flange effective to hook downwardly over the top edge of the lower course of successive courses of shingles. The device has a first end section, a base end section, a back section, an insertion section and a second end section. Each of these sections are connected to each other by a series of bends in a single piece of material having five sections and four bends.

Abstract: A document handling apparatus permitting simultaneous use by two operators comprises first and second stations located at opposite ends of a common document reader. Documents are supplied to the reader via a conveyor belt from either station, but reading of the document is effected only as the documents move from the first station to the second. When a document to be read is applied to the apparatus at the first station, the document is moved, via the conveyor belt, to the reader and then returned to the first station. On the other hand, when the document to be read is applied to the apparatus at the second station, the document is moved toward the first station beyond the reader, and then moved back toward the station. As the document passes the reader, the data recorded on the document are read. Means are included for recording data on the document, and then reading the document to detect any recording errors.

Abstract: Fertilizer materials, especially potassium dihydrogen phosphate, are produced by the reaction of phosphate rock or a solubilized form thereof, such as mono calcium phosphate, dicalcium phosphate, etc., concentrated sulfuric acid, potassium hydrogen sulfate and, optionally fresh or recycle phosphoric acid, the resulting mixture is filtered to remove the calcium sulfate precipitate and the potassium dihydrogen phosphate is recovered from the filtrate, either by concentration and filtration or by extraction with an organic solvent.