US570496A - Magnetic separator for threshing-machines - Google Patents

Description

n (NoModel.)

E. H. OSBORN. MAGNPTIG SBPARATOR FOR THRBSHING MACHINES.

No. 570,496. Patented Nov. 3, 1896.

UNITED STATES PATENT OFFICE.

ELISHA Il. OSBORN, OF DES MOINES, IOVA.

MAGNETIC SEPARATOR FOR THRESHlNG-IVIACHINES.

SPECIFICATION forming part of Letters Patent No. 570,496, dated Noyember 3, 1896.

Application filed January 24, 1896. Serial No. 576,747. (No model.)

To all whom it may concern.-

Beit known that I, ELIsHA H. OsBoRN,a citizen of the United States of America, and a resident of Des Moines, in the county of Polk and State of Iowa, have invented a new and useful Improvement in Magnetic Separators for 'lhreshing-Machines, of which the following is a specification.

Heretofore much trouble has been experienced by threshermen owing to the frequency with which the teeth of the cylinder or concave of the machineare broken by reason of the clicking of the cylinder by excessive feeding or the presence of pieces of metal or rock or wood in the bundles of grain. Vhen one tooth is broken from either the cylinder or concave, it naturally passes through the machine, is conveyed by the elevator to the tail spout or shoe, from which the tailings are delivered to the cylinder for rethreshing, and falls into and passes through the machine again and again, causing material and expensive damage by destroying additional teeth. This trouble is experienced to the greatest degree in machines Whichemploy automatic or self-feeding apparatus, since under such circumstances no attendant is adjacent to the shoe to remove the teeth as they appear and prevent them from rentering the machine.

It is the object of this invention to provide means for automatically removing broken teeth or other metallic objects from the tailings as said tailings reenter the machine and prevent said teeth from continuing their damaging course.

My invention consists in locating a magnet in the path of travel of the tailings, which magnet is of such character as to attract and retain the broken teeth, and also in the provision of an alarm indicating the presence of a tooth on the'magnets.

My invent-ion consists, further, in locating in the path of travel of the tailings from the machine to the cylinder a series of metallic bars arranged in close juxtaposition to each other and connected with an alarm indicating the presence of a tooth or other foreign metallic body in contact with the said bars.

My invention consists, further, in the construction, arrangement, and combination of parts hereinafter set forth, pointed out in my claims, and illustrated by the accompanying drawings, in which- Figure l is a side elevation of a portion of a threshinginachine, showing my invention applied thereto. Fig. 2 is a sectional elevation longitudinally of the delivery spout or shoe, showing my invention applied thereto. Fig. 3 is a plan of the delivery spout or shoe to which my invention is applied. Fig. 4 is a plan of a delivery spout or shoe to which a modified form of my invention is applied.

In the construction of the machine as shown the numeral l0 designates a delivery spout or shoe which is suspended in a common inanner above and adjacent to the entrance to the breast of a threshingmachine, and a delivering-elevator l-l of common form discharges the tailings of the machine into the outer end portion of the said shoe. The shoe may be of any ordinary construction, preferably with an open top, and may be provided with any ordinary means of screening the tailings and discharging said tailings.

The side boards of the shoe l0 are apertured in series in inclined planes, and a series of bars or magnets, as they hereinafter will be termed, l2 are mounted in the said apertures at slight distances of separation from each other and provide a slotted way or screen to receive the tailings from the elevator ll. The magnets 12 are of the character designated as permanent magnets and are of such size and strength of magnetism as will attract and retain broken teeth or other small metallic objects when brought in close relation therewith. The magnet nearest the outer end oi' the shoe is connected to a circuit-wire l3,which circuit-wire leads therefrom through a bell 14, mounted on the elevator l1, and through a battery l5, also mounted on said elevator. The circuit-wire leads from the battery l5 to the magnet adjacent to the one nearest the end of the shoe, and the remaining magnets are in like manner alternately connected to the circuit-wires. By this construction an electric circuit is not complete until two adjacent magnets are electrically connected, as, for instance, by a tooth lying upon and engaging both of said magnets.

In the form of device shown in Fig. et the magnets are of horseshoe shape and overlap IOO each other in pairs, one magnet of each pair being connected to the opposite end portions of the circuit-wire 13. The horseshoe-mag nets are positioned in different horizontal planes in order that they may overlap without such contact as will establish a circuit un der normal conditions.

ln the practical use of this device when a tooth is deposited in the shoe from the elevator it immediately is attracted to and contacts with one or two or more of the magnets and is retained by said magnets and prevented from rentering the machine. Then a tooth engages two or more of the magnets simultaneously, a circuit is established through the battery and bells and the bells are run g, thus sounding an alarm and indicating the presence of a tooth in the shoe. Upon hearing the 'alarm an attendant may remove the tooth from the magnets and thereby avoid the possibility of its accidental release or the running down of the battery.

I claim'as my inventionl. In a threshing-machine, a series of metallic bars located in the path of travel of the tailings from the machine to the cylinder and forming abottom over which the tailings must pass to the cylinder, and an electric bell-circuit connected with said metallic bars, which bell-circuit is normally open and is closed by the contact with said bars of a foreign metallic body.

In a threshing-machine, a magnet located in the path of travel of the tailings from the machine to the cylinder and a bell-circuit electrically connected with said magnet and operated by the contact of a metallic body with said magnet.

3. ln a threshing-machine, a shoe through which the tailings pass vfrom the machine to the cylinder, a series of metallic bars arranged in juxtaposition to each other within said shoe and forming a bottom over which the tailings must travel to the cylinder, and an alarm connected with said bars and so arranged relative thereto as that said alarm will be sounded when a metallic body engages two or more of said bars.

et. In a threshing-machine, a shoe through which the tailings pass from the machine to the cylinder, aseries of metallic bars arranged transversely of the shoe parallel with and in juxtaposition to each other and forming a bottom over which the tailings must pass to the cylinder, an electric alarm-circuit, connections between one line of said circuit and alternate individuals of the series of bars, and connections between the remaining line oi' the alarm-circuit and the remainder ot the series of bars.

ELIS'IIA Il. OSBORN.

Witnesses:

S. C. SWEET, G. M. MELICK.

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