Centrifugal grinding machine
US 2101442 A
Description (OCR text may contain errors)
Patented Dec. 7, 1937 UNETED STATES PATENT OFFICE Application August 8, 1935, Serial No. 35,284 In Mexico October 26, 1934 Claims.- (01. 83-7) This invention relates to a grinding machine or mill of the centrifugal type and in which the grinding is accomplished by friction between a pair of grinding stones or disks disposed in axial 5 alinement, one of the features of the present invention being the inclination of the main axis on which the grinding disks are mounted, said axis forming an angle less than a right angle to the vertical. Another feature of the invention is that the frame of the machine is of the console type, thus affording ready access to all parts thereof, and particularly to the milling members.
Still another feature is the provision of fluid pressure means for effectively controlling the axial pressure of the grinding disks.
The principal features of the machine are clearly explained in the following description of its operation and in the accompanying drawing, 'which illustrates the machine in side view, certain parts being broken away and shown in section.
The grains or material that are to be ground are deposited in a hopper I adapted for the purpose, and in its lowerpart. This hopper l rctates and being handled at the operators ease permits the material to be transferred during rotation to the side that forms the smaller angle with the vertical where the material, by gravity, goes into the millstones through the feeding tube, thus facilitating the circulation at the stirrer I6 which is threaded at the upper end of the main axle, as is clearly shown in the accompanying drawing. During the milling process the material is expelled by centrifugal 35 force towards the periphery of the discs and gathered within the walls of the adjustable screen 5 falling easily, afterwards, into the rotating pan 1 where the operator can easily pick up the ground product on the higher part of said pan. The adjustable blade 6 facilitates the complete gathering of the products when cleaning the inher surface of the walls of the screen 5. The' rod of this blade 6 is fastened to the disc 1, in which it is so mounted as to permit the quick adjustment of the height of said blade.
For the cleaning and inspection of the milling devices a combination of wheel and worm has been arranged that permits the lifting of the upper part of the frame by means of crank and rod ll thus making that part of the frame rotate on pin 3 where the articulation is established. This rotating efiect is obtained by turning the fly Wheel with crank l2 on the shaft of which the worm of the wheel is mounted.
55 When millstones of basaltic or quartzose rock are used their relative wearing is compensated by means of bolster 3 which is threaded to the upper part of the frame and fastened, as seen in the drawing, by clutch 2 which is lodged in a cut made according to the axis of the threaded 5 chamber.
The pressure required for the grinding is imparted to this machine by the oscillations of lever I9 which in turn operates, by means of a small rod, pump piston 53 which is connected 10 with distributing chamber I0 and hydraulic cylinder, 8 the piston of which operates directly on the axial bearing of the main axtree. The pressure exerted upon the rubbing faces of the millstones can be read on pressure gauge I3. 15 To produce an immediate cessation of pressure, lever 14 has been installed. Its rod obturates the by-pass of the chamber, thus permitting a certain amount of liquid to flow from the cylinder 8 into the cylinder of the pump 9 thereby 20 automatically relieving the pressure on the piston in said cylinder 8.
To recover the original pressure, one oscillation of the lever I9 is enough to let the volume of the displaced liquid return to the space formerly occupied in the cylinder.
To displace the contents of cylinder 8 lever 15, situated below the collecting pan, is operated.
In the drawing, this machine is shown as operated by direct coupling with electric motor I! by means of the counter-shaft and the conical gears 2| and 22. If desired it also can be coupled to an internal combustion engine or to any other kind of engine, both placed in a common base so as to have a unit with its own motive force. However, a belt and pulley drive may be substituted for the coupling 20, if desired.
Having thus described my invention, what I claim is: v
1. A centrifugal grinding machine of the friction disk type, comprising two articulated arms disposed in the same vertical plane and each carrying a grinding disk, the upper disk being fixed and the lower one rotary, said disks being disposed in parallel longitudinal alinement in a 5 plane inclined to the vertical and normally having their abutting faces in contact over their entire area, and means for raising one of said arms thereby to separate the disks, said means comprising a worm Wheel mounted for rotation on one of said arms, a link eccentrically pivoted at one end on said worm wheel and pivoted at its opposite end on the other arm, a worm in engagement with said worm wheel, and means for rotating said worm.
Dec. 7, 1937. w MElNERT 2,101,443
AIR BRAKE FOR AEROPLANES Filed March 25, 1937 INVENT OR.
M14) ME/IVERT BY