June 20, 1912 
Pulley Covering

The American No-slip Cement Co., Boston, Mass., hootCently perfected a pulley cement covering which it is mar-keting under the trade name of "Palium." It is easily applied with a brush, dries quickly, and produces a firm, dry, per-manent covering calculated to reduce belt slippage. In a series of tests conducted at the Massachusetts Institute of Technology to determine the relative efficiency in power transmission of cast-iron pulleys before and after treatment with "Palium," in regard to slip and coefficient of friction, the following results were established: 55 per cent. decrease in slip in favor of pul-leys covered with "Palium," the belt ten-sion varying from 60 to 80 lb. per inch of width; a decrease in the coefficient of friction from 0.189 to 0.169 on "Pal-ium." 
Press Safeguard In Vol. 35, page 1045, there was shown a press safeguard made by the H. & A. Lock Co., of Brooklyn, N. Y., which has since been improved. The original guard was operated by the foot treadle' alone, as shown in Fig. 1, it being so timed as to rise previous to the tripping of the press. The improvement, as shown in Fig. 2, consists of an additional set of levers, so that the guard is operated at each revo-lution of the crank, regardless of whether the treadle is pressed or not. Any ac-

AMERICAN MACHINIST     page 1013 
cident to the treadle or clutch will not prevent the raising of the guard. In Fig. 1 the guard is shown lying flat on a level with the top of the die, and 

Boumonville Co., New York, N. Y., and is known by the trade name "Oxygraph." It is on the principle of the pantograph. The operation is as follows: A drawing is made twice the size of the finished work. This drawing is laid on the tracer table. The tracer is mechan-ically propelled at a uniform speed to give the greatest efficiency and is driven by an electric motor attached to the head of the machine. Power is supplied to the motor either from a storage battery or by a wire from an electric light socket. 

FIG. 2. VIEW FROM OPPOSITE SIDE, SHOW-ING CAM-OPERATING LEVERS 
in Fig. 2 it is shown raised to its full height, the length of travel of the cam roller on the upper operating lever be-ing such that the guard remains up till the punch has fully entered the die. 
Oxyacetylene Metal-Cutting Machine A new metal-cutting machine using the oxyacetylene flame is shown in Fig. 1. This machine is built by the Davis

FIG. 2. CRANKSHAFT 51 IN. KERF CUT IN 8% MINUTES 
The operator guides the self-propelling tracer along the lines of the drawing, and the oxyacetylene torch cuts an exact reproduction of these lines in the steel. This reproduction is half the sire of the drawing. Steel three inches thick, and less can be cut at the rate of 6 in. per minute. The apparatus consists of a heavy cast standard and base for supporting the ma-chine, supports for the work while being cut, the tracing table, motor-propelled tracer, machine cutting-torch and hose 
FIG. 1. PUNCH-PRESS SAFEGUARD 
FIG. 1. OXYACETYLENE METAL-CUTTING MACHINE 
 

test 

1012 
"safeties" are provided for movements in all directions, in addition to adjustable knock-outs for the feed of the table. It is impossible to engage two con-flicting speeds or traverses at the same time; a single lever controls the reverse of all these and the speeds. The drive for the table and the outer support is through three shafts which run in oil in a pocket or reservoir formed in the bot-tom of the table, power being distributed from this central point in all directions. Floating nuts are used on feed screws to avoid cramping and are made in two parts, adjustable in opposite directions, so as to take up wear and prevent lost motion. Some of the new details are shown in Figs. 2 and 3, their operation 
being so evident as not to require de-tailed description. In addition to boring, drilling and milling, the machine is arranged for splining by using the power rapid trav-erse and driving the spindle in and out without its being rotated. To accom-
AMERICAN MACHINIST 
the spindle, many different pitches of oil grooves or threads can be cut. There is a convenient indicator pro-vided on the front nose of the saddle, showing the exact center of the spindle, for the convenience of 'the operator in locating with the surface gage from the table when boring. These machines are built in two sizes, one with a 3- and the other a 3%-in. spindle. 
Universal Cylinder Boring and Milling Machine This universal cylinder-boring and milling machine is designed to simultan-eously bore two twin-cylinder automobile-
engine castings and mill the flanges on two more castings. By revolving the table the castings that have been milled are brought into position to be bored. The machine consists of a substantial bed, supporting at one end a carriage with two boring heads, each carrying two 
Vol. 36, No. 25 
17/ to 24 in. in diameter. The milling spindles are driven by a 5-in. belt on a 3-section cone, from 11% to 16 in. in diameter. The quick power movement for the milling carriage is driven by a 4-in. belt on a 10-in. pulley. The least and greatest distance from the center of the table to the face of the boring heads is 27 in. and 57 in., respec-tively. From the center of the spindles to the top of the table the distance is 95/8 in. From the center of the table to the end of the milling spindles, the least and greatest distance is 283/4 in. and 313A in., respectively. From the center of the spindles to the top of the table is 93A inches. The milling saddle is 20 in. wide, 41 in. long and has a movement of 52/ in. on the cross head ; it also has a quick power movement from 6 to 113% ft. per minute in either direction. The car-riage has geared feeds at the rate of 4, 8, 16 and 32 revolutions of the spindle to 1 in, travel of the carriage. Feeds for 

UNIVERSAL CYLINDER-BORING AND MILLING MACHINE 
plish this, the spindle gear clutch is brought to a neutral position; the spindle driving gears. are disengaged and a key is inserted in the milling clamp collar at the end of the saddle which engages one of the splineways in the spindle. The mill-ing clamp collar is held from rotation by a friction band, tightened by a thumb-screw on the outside of the bonnet. The collar and spindle are thus secured against relative rotation, but the spindle is guided in its endwise motion by the key. Spiral oil-groove cutting, which is in 
spindles; at the other end is a crosshead, carrying a saddle with two milling spin-dles; near the middle of the head is a revolving table. The revolving table is 54 in. square and is provided with a ball bearing, which, when raised into position by a hand-wheel, takes the weight of the table and allows it to be revolved easily. When the machine is in operation, the table rests on a scraped surface of large diameter. The table has four stop-pin holes and can be securely fastened after locating with the locking pin. 
reality thread cutting, can also be ob- The carriage is 34 in. wide, 54 in. long tained by using the power rapid traverse and has a 30-in. movement on the bed. for the spindle and at the same time en- It has a quick power movement of 6 ft. gaging any one of the spindle feeds, per minute in either direction, indepen-thereby rotating the spindle. By the dent of spindle drive. bination of direct and back gea0411MV'the boring spindles are driven by a tre feeds and the 12 speed changes for 6-in. belt on a four-section cone, from 
the milling head are from 1 in. to 4% in. per minute at any spindle speed. The boring and milling spindles are of cruci-ble steel running in hard bronze boxes. Means are provided to compensate for wear in the bearings and the speeds of the boring and milling spindles are 22,4, 28, 35, 44 and 7%, 10 and 14 r.p.m., re-spectively. The countershaft for boring spindles has a tight and loose pulley, 16 in. in di-ameter for an 8-in. belt, to run 265 r.p.m. The countershaft for the milling spindles has a tight and loose pulley, 14 in. in diameter for a 4-in. belt, to run 215 r.p.m. ; also two loose pulleys 14 in. in diameter for a 4-in. belt to drive quick power movement. The weight is approx-imately 28,000 lb. The machine is a -A.e-cent product of the Beaman & Smith Co., Providence, R. I. 
 

June 20, 1912 
Selling—AMERICAN MACHINIST—Section 
27 

Feed control is a vital element in the 
daily handling of a milling machine 

CONCENTRATION 
On KEMPSMITH Millers 

ALL feeds are under operator's immediate control from ONE 
combination lever located at his fingers' end at front of knee 

Makes no difference whether he is feeding table to right or left, or in or out on knee, or up or down on column

—he can throw in or throw out by one combination lever. There is no maze of levers for him to master. The machine is easy to "get the hang of," easy to run. (I Think how much this reduces the many daily chances for accident and spoiled work

—the operator can't go wrong in emergency through ignorance or carelessness, or confusion or hurry. ONE lever at the front to think of--that's all. 

The Kempsmith Manufacturing Co. Milwaukee, Wisconsin 

NEW YORK OFFICE: 30 Church St. FOREIGN AGENTS—Selson Eng'g Co., London, England. Thielicke & Co., Berlin, Germany. Edgar Bloxham, Paris, France. 0. R. San Galli, St. Petersburg, Russia. Hans Schulze, Vienna. Austria. A. Engelmann & Co., Liege, Belgium. Stiissi & Zweifel, Milan, Italy. Schaufelberger & Co., Zurich, Switzerland. Post Van der Burg & Co., Rotterdam, Holland. Aktiebolaget Goteborgs Maskmaffar. Gothenberg, Sweden. Bevan & Edwards Propty., Ltd., Melbourne, Australia. Parke & Lacy Co., Ltd., Sydney, N. S. W., Australia. Leslie A. Walker, Wellington, N. Z.