W hite Print M ach in e
Mo d e l A i s the designation of a new autom atic, high-speed white print ma
chine that has been announced by the Ozalid Corp., 354 Fourth Ave., New York, N. Y. It is stated that the new machine produces Ozalid positive type prints a t speeds ranging up to 20 linear ft. per minute. An important feature is the automatic separation of the original and the print. The opera
tor stands in front of the machine, merely feeding in the original and the sensitized material, whereupon the machine completes the exposure, sepa
rates the original and print and re
turns the original to the operator while the print is carried through the developer and discharged a t the rear of the machine, dry and ready to use.
Either cut sheets or continuous yard
age can be handled autom atically. Any light intensity between full illum ina
tion and GO per cent of this intensity may be selected to permit uniform printing.
Link Leather Belt
Gr e a t f l e x i b i l i t y is claimed for the new Duplex link leather belt recently announced by Alexander Bros., 40G North 3d St., Philadelphia, Pa. The new belt is composed of double ply links of leather formed by bonding to gether the flesh or rough sides of two single links, producing one solid link with the grain side of the leather on the outside. These links are bored and then joined together with steel con
necting pins, the ends of which are counter-sunk in the end links to avoid damage in running against the end of the pulley. Friction between links is said to be minimized resulting in longer belt life and a higher percentage of transmitted power. The belt is de
H ig h -sp e ed w h ile p rin t m a c h in e
signed for slow, lieavy-pull drives where some slippage is required and is particularly recommended by the manufacturer for paper m ill winders and similar drives.
K neading M achinery
Sa i d t o r e p r e s e n t entirely new de
sign principles throughout, with no mechanical resemblance whatsoever to earlier constructions, a new line of mixing and kneading machinery has been introduced by the Patterson Foun
dry & Machine Co., East Liverpool, Ohio. Made under the name of Knead- ermaster, these new mixers are avail
able in any desired batch capacity from the J-gal. experimental unit up to a size of 1,500 gal. Sixty different com
binations of frames, sizes, and horse
powers are built in a variety of types and strengths for widest possible u til
ity on medium- and heavy-duty opera
tions. The equipment is recommended by the manufacturer particularly for the mixing and treating of heavy plastics and tenacious materials of every description.
A rea T ype M eter
Ad a p t e d p a r t i c u l a r l y to the meas
urement of liquids which are viscous or corrosive, a new type of flowmeter known as the Linamcter has been de
veloped by the Cochrane Corp., 17tli St.
and Allegheny Ave., Philadelphia, Pa.
The body of the new meter is installed as an integral part of the pipe-line. It contains a weighted disk positioned by the velocity of the fluid through a
tap-Soction of lin k le a th e r b e lt
P a tte rs o n K n e a d e rm a s te r m ixer
ered throat section, in such a manner that the disk travel is directly propor
tional to the flow’ rate. Attached to the disk is a rod and iron core, the latter traversing the field of two re
actance coils surrounding the pressure- tight tube of the meter body. These coils form a reactance bridge which, connected electrically to sim ilar coils in the indicating, recording and in
tegrating instrument, forms a means of transm itting the measurement to any desired distance from the meter body. The recording instrument em
ploys the galvanometer null principle.
A uniformly graduated scale is used.
Advantages include high accuracy over a wide range, easy change of capacity and a simple and reliable integrator, according to the manufacturer.
N e w Products
A n e w corrosion-resistant paint con
taining eleetrolytieally refined metallic copper, in a suitable vehicle, has been announced by the Phelps-Dodge Refin
ing Corp., 40 W all St., New York, N. Y. The pigment is composed of extremely thin copper flakes which are stated to lie parallel with the paint film and thus afford greatest protec
tion to the largest possible surface.
Four types are available, three for industrial and general purposes and one for marine use. The general u til
ity type is used both for priming and for the finish coating of steel or wood.
A special purpose type is used on
core
C ross sec tio n of n e w L in am e te r
CHEMICAL & METALLURGICAL ENGINEERING . J U N E 191,0 • 423
wood, metal, cement or concrete floors and is particularly recommended for resistance to abrasion and petroleum products. A satin luster type is, pro
duced for use on wood or metal.
A j o i n t s e a l which is said to be completely resistant to propane, pen- tane, benzol, petroleum products of Service Department of National Oil Products Co., Harrison, N. J. The producing a stabilized emulsion spon
taneously without rapid agitation and without special equipment. Milwaukee Junction Post Office, De
troit, Midi. The new material is said to be highly resistant to wear and decidedly lion-slippery even when wet
ted or oil splashed. Perfect bonding to old paint, provided the latter is in sound condition, is claimed.
Th r o u g h a new development in
plastic materials, the Irvington Var
nish & Insulator Co., 24 Argyle Ter
race, Irvington, N. J., has been able to announce a line of extruded tubing manufactured in continuous lengths for use particularly in electrical in
sulation. The tubing is said to be flexible, of high mechanical strength and resistant to heat, moisture, oils Washington Square, Philadelphia, Pa., states that this concern has acquired the rights to the United States patents of the Department of Science and In
dustrial Research, London, England, on the use of synthetic resins as acid markedly reduced, approaching, at least as a theoretical lim it, the purity line exhauster designed particularly for handling air containing steam, dirt, Wing-Scruplex propeller fan is used, with the motor located outside the give full-scale readings on differentials as low as 3 in. of water, and is also available for various higher differen
tials. Three types are built to provide ring under differential pressure is communicated through a cam to the pen-shaft and pen, the cam compensat
ing for the normal square-root relation and giving an evenly divided chart scale. An interm ittent type integrator which adds up four instantaneous values per minute is employed.
H orizontal M ixer
An i m p r o v e d horizontal drum-type mixer operating on the cut-divide-remix principle and rated at 1-ton capacity alternately collect their loads- from opposite ends of the drum and feed them evenly back to the dual spirals.
Spirals revolving in opposite directions again divide the load and each spiral carries its portion to the opposite end of the drum. Heavy gage welded steel is used throughout. Slow speed shafts are carried in bronze bearings and other shafts in self-aligning, dust-tiglit ball bearings. Special double seals under spring tension are provided at both ends of the drum.
Another recent development of this company is a special grinder for the
D ia g ra m of rin g - b a la n c e m e te r
424 • J U N E 19-10 • CHEMICAL & METALLURGICAL ENGINEERING
Box g r a b a n d tra m r a il c a r rie r
ing chamber lim its waste recirculation of ground material and reduces heating
cently announced by Cleveland Tram- rail Division of the Cleveland Crane & controlled by a push-button station which also controls the rotation. Vari
ous sizes up to 5 tons (including box, grab and material) are available.
S p ee d R educer
Co m p a c t d e s i g n and high ratios of speed reduction without the use of large gears are features of a new speed reducer recently put into production by the Brad Foote Gear Works, 1301
of “packaged” construction has recently been developed by Electric Machinery Mfg. Co., Minneapolis, Minn. The so- called packaged motor simplifies in
stallation and wiring, reducing space requirements and lowering first cost for the motor equipment. External wiring for this motor is the same as for a squirrel-cage induction motor, the need for a separate panel-type con removing excitation for the field wind
ing of the synchronous motor. Such reaches a predetermined temperature.
It is available for changing color at many different temperature lim its. The paper has an opaque w hite coating of disintegrate natural rubber, has been announced by the Industrial Products Co., 800 W est Somerset St., Phila Merco-Nordstrom Valve Co., 400 Lex
ington Ave., Pittsburgh, Pa., has de timed off-and-on operations. These instruments are capable of resetting instantly after a power failure. A positive, magnetically operated me
chanical lock is employed, eliminating possibility of disconnection due to vibration.
A l i n e o f small electric furnaces measuring 3 by 41 by 5 in., with the mullle rapidly and uniformly heated by a heavy Nichrome wire element, has been announced by the Western Gold 6 Platinum Works, 589 Bryant St., Sail Francisco, Calif. These furnaces are used for temperatures up to 1,800 deg. F. and are provided with an at
tached pyrometer. Being well insu
lated, they are said to require little power and no special wiring. Furnaces in other sizes and temperatures up to 2,800 deg. F. are available.
A n e w mercury-to-niercury tempera
ture controller known as the Phila
delphia Merc-to-Merc has recently been announced by the Philadelphia Ther
mometer Co., Philadelphia, Pa. This new instrument, which is stated to
CHEMICAL & METALLURGICAL ENGINEERING . J U X E 19J,0
C a U K ; Im p ro v ed S ta b ilflo d ia p h ra g m v a lv e
have a sensitivity within 0.1 deg. F., consists of a mercury bulb w ith a glass partition through the center, making a double bulb to which is fused a circuit. These temperature regulators are available in both adjustable and non-adjustable forms. The standard type is suitable for temperatures to 700 deg. F., with 1,200 deg. F. instru
ments available in mercury-to-wire contact types. The mercury-to-mercury type features higher contact capacity than the mercury-to-wire type, avoid
ing use of an intermediate relay when employed with a mercury plunger relay available from this company.
Th e Un i t e d St a t e s St o n e w a r e Co.,
Akron, Ohio, has announced commer
cial production of ,}-in. inside diameter plug, depending on desired character
istics. The valve is designed for the higlr lift necessary for wide-range flow characteristics, tw ice the movement for the same air pressure range as in ordinary valves being attained, accord
ing to the manufacturer. The design closed-circuit Redler conveyor, which is said to assure absolute cleanliness and freedom from contamination. The new design features the driving chain moving in a compartment separate and distinct from the compartment hand
ling conveyed material. This construc
tion is said to eliminate any metal-to-metal contact in the carrying run of the conveyor, preventing pos of Redler conveyor-elevators such as inclosed and dust-tight construction, compactness, minimizing of breakage of conveyed materials, elimination of feeders, and self-cleaning action.
Im proved Controllers
Fo r t h e m e a s u r e m e n t, recording and control of temperature, pressure, flow and liquid level, the Taylor In
strument Cos., Rochester, X. Y., have introduced a completely redesigned line of Fulscope air-operated instru
ments, available in five standard types.
These types include: fixed high sensi
tivity; adjustable sensitivity; adjust
able sensitivity with automatic reset;
adjustable sensitivity with a new factor known as “Pre-Act” ; and ad
justable sensitivity with automatic reset and Pre-Act. This new factor, Pre-Act, is a supplementary control feature which makes control valve cor
rections according to the rate of control-point deviation. This effect is said to reduce greatly the tendency to overshooting and oscillation on sudden process disturbances.
The automatic reset feature which compensates for load changes is lo
cated in the instrument case and is fully adjustable over a much wider range than previously. Throttling range adjustment over a wider range insures complete adaptability to pro
cess lag according to the maker, while fully pneumatic sensitivity reduction is said to give consistent controller per
formance throughout the entire sen
sitiv ity range and to provide inherent compensation for air supply pressure fluctuations. Other features include easy intcrchangeability in the field from one form to another, extensive use of 18-8 stainless steel, an improved relay air valve with sapphire orifice, and built-in auxiliary air filters. Easy maintenance is said to follow from simple design and ready accessibility for adjustments.
"Lo-Amp" Motor
Th e Lo u i s Al l i s Co., Milwaukee, Wis., announced recently the develop
ment of a new motor intended particu
larly for use in refrigerating and air conditioning installations, which fea
tures particularly low loeked-rotor cur
rent and which can be supplied in no centrifugal switches, relays, brushes or slip rings. No expensive special correct the rational Baum4 degrees shown on the nomograph to the Amer
ican system, the following expression may be used: American B6. deg. = 10 + 0.97 chart B6. deg.
426 J U N E 1940 • CHEMICAL & METALLURGICAL ENGINEERING
C H K M I O A L & I f ETA L L U R G I C A 1 . E N G I N E E R I N G j i . \ u ifi'iO 42G B