December 20, 1928
INDUSTRIAL AND ENGINEERING CHEMISTRY
Industrial Notes Du Bus Pump for Handling Heavy Liquids The W. B. Connor Co., Inc., Lincoln Park, N. J., has developed a pump intended specifically for the handling of viscous and heavy liquids, such as molasses, oils, tarry products, etc., but capable of handling any liquid or semi-liquid that will pass through pipes. Any required capacity can be secured, and pressures from 1 to 2000 pounds per square inch can be main tained. In the Du Bus pump there are only three moving parts, the cylinder body and two plunger disks. The only other parts are the necessary bearings and the pump body, which is divided horizontally into two sections. The
9
images m a y be recorded photographically b y the insertion of a photographic plate. T h e projector can also be used for forgery examination of paper money and signatures, for the examination of paper a n d fabric products, i n the watch industry, for medical purposes, etc.
Chemical Products in Room Decoration A suite of rooms just completed a t the d u Pont-Biltmore Hotel in Wil mington, Del., is attracting much attention not only because of the appli cation of l'art moderne, but because the decoration o f the rooms i s an e x ample of the use which is being made in this new style o f such chemical prod ucts as lacquers, lacquered fabrics, rayon, a n d plastics. The materials for decorating the rooms were furnished b y the various divisions of the d u Pont Co. Duco has been used to obtain the hard brilliant surface o n tables, chairs, and other pieces. Striking effects in wall coverings are obtained with lacquered fabrics, unusual designs in window drapes are also achieved, and the curtains are of an impregnated fabric which is being used widely today in modern buildings. Certain chairs are a l s o upholstered in Fabrikoid in designs which are illustrative of the modern mode. Pyralin has been used to replace metal on the drawers of dressing tables and other furniture pieces, in the shades and bases of lamps, a n d in clothes hangers, rods, etc., in the closets. There is an abundant use of rayon in window drapes, upholstery for furni ture, bedspreads, and other fabrics.
Representatives of National Flue Cleaner Co. The National Flue Cleaner Co., Inc., Groveville, N. J., has appointed t h e following western agents to handle the national soot blower for fire-tube boilers: McGee Sales Agency, 75 Fremont St., S a n Francisco, Calif.; Flickinger, Meyers & Rudolph, 129 West Second St., Los Angeles, Calif.; and t h e Manufacturers Sales-Service, P. O. Box 655, S a l t L a k e City, Utah. W. A . Ramsay, Ltd., Honolulu, was appointed representative for Hawaii.
Changes in Personnel of Hercules Powder Co. Luke H. Sperry, superintendent of the Kenvil plant, has become manager of the Virginia Cellulose Co., Hopewell, Va. H . V. Chase, superintendent of the Bessemer, Ala., plant, has succeeded Mr. Sperry at Kenvil and is i n turn succeeded at Bessemer by H. B . Sanders, assistant superintendent of the Carthage, Mo., plant. J. O. Lowe has been promoted from acid s u pervisor of the Carthage plant to assistant superintendent, succeeding M r . Sanders.
D u Bus P u m p cylinder body is a metal cylinder in which are cut five grooves, which are the cylinders of t h e pump, each cut in an accurately computed spiral, ma chined to the closest tolerances- The cylinder body is mounted on ball bearings and rotates in a close-fitting housing, formed by the upper and lower sections of the pump casing, in which are the intake and discharge ports. T w o plunger disks, suspended from ball-thrust bearings, are located one on each side of the cylinder body. Each plunger disk has five specially formed notches, which engage the sides of the grooves in t h e cylinder body and permit the segments of the disks to extend down into the grooves t o provide the plunger action. The cylinder body is driven and causes the two plunger disks to rotate, much as a worm drives its gear. However, the surfaces of the grooves in the cylinder body and the notches in the plunger disks have been computed with mathematical exactness and s o generated that they fit together a t every point o n the sides and bottom without clearance and maintain this 100 per cent surface contact throughout their engagement as the elements rotate. This constitutes the fundamental feature of the design. The resulting action constitutes an entirely new mechanical movement and is a patented and exclusive feature of the Du Bus pump. The perfect fit between parts of engaging surfaces also produces a high vacuum on the suction side of each disk and a pressure on t h e discharge side, drawing the liquid into the pump and through the ports in the pump body into the grooves of the cylinder body. The figure shows the cylinder body and plunger disk at the instant when the right plunger disk i s about to enter cylinder groove Β in t h e body. Direction of rotation is indicated by arrows. Cylinder groove Β is filled with liquid which has been drawn in as it passed the upper suction port and is coming opposite the upper discharge port in the housing. As the cylinder body rotates, it turns t h e plunger disk, and segment Β moves down into cylinder groove B , forcing the liquid out through the discharge port. Pass ing the lower suction port, cylinder groove Β again fills with liquid, which is forced out through the lower discharge port. In this w a y each cylinder groove is filled and emptied twice per revolution. The Du Bus pump has a n efficiency ranging from 70 to 85 percent. Iden tical actions taking place simultaneously on directly opposite sides of the rotating cylinder body confine t h e radial load on the main bearings to the actual weight of the rotating members, keeping friction to a minimum and reducing wear on bearings. A n auxiliary port, extending through the cylinder body and connecting t h e spaces at each end acts as a by-pass for the liquid and serves to equalize the pressure on each end of the rotor. The power required t o turn the disk increases only slightly with increase of pressure, because the only effect is to increase the pressure on the disk, the added load producing only a slight increase of friction on t h e vertical thrust bearings. At whatever capacity the pump is working, there is uniform, continuous discharge, w i t h quiet, vibrationless operation. Maintenance costs are a negligible factor.
A New Brinell Microscope The Paul F. Hermann Co., Keenan Bldg., Pittsburgh, Pa., is sole repre sentative for a new Brinell microscope (projector type) which makes the inspector independent of daylight, does away with the tiring of the eyes, and on account of its enormous magnifying power guarantees accurate read ings. With the Busch-Schumann projector the image of the Brinell ball impression, even when a lipped rim is produced, appears a t once, magnified ten times and sharply focused o n a ground-glass screen. The microscope is about 12 inches long, and its small size makes measurement and testing possible in places which were formerly very difficult of access. This type of measuring instrument is new and its manipulation i s simple. The projector, with its interchangeable lower part, is set upon the surface to be measured. The illuminator, which is incorporated in the instrument, lights up the surface so that the image is projected with clearness through the built-in objective onto the ground-glass screen above it, on which two diameters of the Brinell impression can be read with an accuracy of 1/320 inch with the help of t h e cross-scales. The scale can be rotated, so that both diameters can be read quickly for any desired setting. With a special device measurements m a y be obtained of recessed surfaces, surfaces which are not plane, or on the inner walls of hollow cylinders. In special cases the
Construction INews Chemical The Hoffmann-La Roche Chemical Co., 19 Cliff St., New York, has plans for the immediate construction of a new plant a t Nutley, N . J., to be fourstory and basement, 110 X 165 ft., reported t o cost i n excess of $100,000, including equipment. Contract for building o n l y has been let to the John W. Ferguson Co., 152 Market St., Paterson, N. J . The Chemical Products Co., 106 North Clark St., Chicago, Ill., has com pleted foundations and will proceed with t h e superstructure of a new t w o story factory at North Chicago, Ill., to be increased by two additional stories a t a later date. It will be 5 4 X 125 ft., estimated t o cost approxi mately $60,000 for the initial unit. Contract for building only has been let to the E. M. Fasting Construction Co., 228 North La Salle St., Chicago. Board of Trustees, Johns Hopkins University, Baltimore, Md., will take bids at once for the construction of a new pharmacological a n d physiological chemistry building for the School of Medicine, t o be six-story and basement. estimated to cost approximately $250,000, including equipment. Chemical laboratories and complete research facilities w i l l be installed. Archer & Allen, Central Savings Bank Bldg., are architects; C. B. Reeder, 916 North Charles St., is mechanical engineer. The Chemical & Pigment Co., Inc., Munsey Bldg., Baltimore, Md., h a s approved plans for t w o additions t o its plant at St. Helena, Baltimore, each one-story, 75 X 100 ft., reported t o cost approximately $80.000, including equipment. Contract for the buildings has been awarded to the Price Construction Co., Maryland Trust Bldg.
Rubber The Gillette Rubber Co., Wisconsin Ave., Eau Claire, Wis., has authorized the immediate construction of two new plant additions, each one- and t w o story, 135 X 80 ft., and 50 X 135 ft., respectively,estimated t o cost in excess of $220,000, including equipment. The first noted w i l l be used for general production, and the other building for expansion in t h e mixing department. Contract for buildings only has been let t o the Hoeppner-Bartlett Co., 4 1 4 East Grand Ave., Eau Claire. The General Tire & Rubber Co., 1709 E a s t Market St., Akron. Ohio, h a s taken o u t a permit for the construction of an addition t o its factory, i n cluding remodeling and improving the present structure. The new u n i t will be two and four stories, reported t o c o s t approximately $200.000, including equipment. (This is a portion of expansion a n d improvement program of this company recently announced.) The Dryden Rubber Co., 1014 South Kildare Ave., Chicago, Ill., manufac turer of mechanical rubber specialties, has begun the erection of a n addition t o its mill, to be 85 X 125 ft., estimated to c o s t approximately $150.000, including equipment, and will have the structure ready for equipment installation at an early date.
Miscellaneous The United Slates Chromium Corp., Wilkinsburg.Pa-, is said to b e perfect ing plans for a new local plant unit at Pitt St. sand Wallace Ave., t o be onestory, 75 X 100 ft., reported to cost approximately $45.000, including equip ment. The Borden Co., 350 Madison Ave., N e w York, manufacturer of milk products, is projecting plans for the construction of a new powdered a n d evaporated milk plant at Waco, Tex. A site i s being secured through t h e cooperation of the Waco Chamber of Commerce, and work is scheduled t o begin in the near future. The entire project i s reported t o cost more than $350.000, including equipment. Walter Page i s general manager. The St. Regis Paper Co., Watertown, N. Y., i s reported t o be planning t h e construction of a new mill in the vicinity of H a v a n a , Cuba, in connection with the acquisition of the Cellulosa Cubana of Cuba. operating in t h a t vicinity, for which negotiations are said to b e nearing completion. T h e proposed mill is expected to cost more than $500,000, including equipment. It is also purposed t o enlarge the present mill of t h e company now being acquired, for considerable advance in present output. The estimated c o s t of the latter expansion is not announced.
