Патент USA US2404145код для вставки
July 16, 1946., -w. M. SICHWE'ICKART ' _ . COUPLING FOR COAL FEEDING- WORMS Filed March 28, 1944 . Zx / v §. ____ a L 2,404,145 Patented July 16, 1946 2,404,145 . UNITED I STAT ES ' PATENT OFFICE '‘ 7 2,404,145., ‘ " I ’ coU-PLING-Fon-ooAL FEEDING worms William M. Schweiokart, clevei‘anaohm Application March 28, 1944, Serial No. 528,451 3 Claims. (01. 287—2)} 1 2 This invention relates generally to the stoker art and particularly to a coupling for coal feeding worms, ash conveying worms and shafting. The main object of this invention is to produce an inexpensive and efficient form of coupling for joining the sections of coal feeding worms. The second object is to construct a coupling of the class described which can be readily attached knurled or ?attened as desired, without depart ing from the spirit of this invention. When joining a pair of worm ends Ill and II' it is desirable to coat the parts with a compound and thereby fill up all of the voids and prevent corrosion due to moisture or other corrosive ele ments in the material being conveyed by the . worm. It will be observed that if the sleeve I8 is turned to draw the ends I0 and II together, the The third object is to construct a coupling 10 double tapered plug I4 is forcibly pressed into the openings I1 and the ends III and II are solid which will reduce the possibility of wear and ly united. Any excess compound will ?ll the corrosion between the contact surfaces of the space 20 between the ends I2 and I3. Obviously associated parts. too great an excess would be objectionable as it The fourth object is to provide a coupling which will have the required strength to resist 15 would prevent a proper seating of the parts. Should it be desiredto uncouple the ends I0 torque in both directions and end thrust in both and I I, it is only necessary to turn the sleeve I8 directions and yet will occupy a minimum of in the opposite direction with relation to the ends space. I0 and II and they will be forced apart by. this I accomplish these objects in the manner set forth in the following speci?cation as illustrated 20 In the form of the device shown in Figs. 4 and in the accompanying drawing, in which; 5, the worm shaft end 2 I is provided with a tongue Fig. 1 is a longitudinal section through the 22'and the worm shaft end 23 is provided with a coupling and the adjacent ends of a pair of worm slot 24 to receive the tongue 22. In this form of sections. 25 the device, the worm shaft ends 2| and 23 are Fig. 2 is a transverse section taken along the provided with threads 2I——R and 23-—L which line 2—2 in Fig. l. . receive the right and left hand threads I8—T of Fig. 3 is an enlarged end elevation of the plug the sleeve I8. member. In the latter described form of the device, axial Fig. 4 is a longitudinal section through a modi rigidity is sacri?ced for a lowered manufacturing ?ed form of the device. ' cost but the principle of the operation is identical Fig. 5 is a transverse section taken along the in the two forms of the device. line 5—5 in Fig. 4. It will be understood that while in Figs. 1 and 2 Similar numbers of reference refer to the same the pitch is not illustrated as being uniform be or similar parts throughout the several views. tween adjacent ?ights of the coupled worms, it Referring in detail to the drawing, there. is is desirable to have them so, although it is not shown in Figs. 1 and 4 the ends II] and I I of a absolutely essential. While all‘ the references pair of coal worm sections whose projecting por have been directed toward the coupling of coal tions I2 and I3 are provided with right hand feeding worms, it will be appreciated that the threads I2—R and left hand threads I3—L. The same arrangement applies to any other form of or detached in the ?eld. ‘ action. shaft ends I2 and I3 are drilled and tapered to approximately 1A5" to the inch‘ forming the sock ets I2—~S and I3—S ?uted along the tapen with 90 degree angle ?utings I2-—F and I3—F. For the sake of illustration, the flutings I2-—F and I3--F are not shown past the end of the plug I4. For the purpose of illustration only, it is stated that if the maximum diameter of the taper is 3A” there would be approximately 24 ?utes I2—F and I3—F formed in the circumference thereof. Fitting into the tapered recesses is a ?uted plug I4 whose ?utes I5 and I6 mate with the ?utes ' ' conveying worm as well as shafting for machine parts wherein the installation and operating con ditions are such as to render use of the ordinary forms of coupling undesirable. . . While I have thus illustrated and described my invention, it must be understood that the pro portions illustrated are only by way of example. Also the number and type of the ?utes I5 and the degree of taper of the plug I4 are not critical. I claim: 1. In a device of the class described, the com bination of a pair of worm sections having their I2-F and I3--F of the tapered recesses I ‘I. The adjacent shaft ends oppositely threaded, said ends I2 and I3 are joined by the reversely thread shaft ends having ?uted, tapered recesses formed ed sleeve I8 whose exterior I9 may be smooth or 55 therein along the worm axis, a double tapered 2,404,145 3 plug having its largestdiameter knurled in the nation of a pair of adjacent axially disposed middle of its length and having ?utes along its tapered surfaces adapted to mate with those ‘in shaft ends, each of which has a tapered recess formed therein, a tapered plug adapted to occupy both of said recesses when said shaft ends are the shaft recesses and a threaded sleeve adapted to receive the threaded ends of said worm sec 5 drawn together, said plug and recesses‘ having tions and draw same together upon said plug. . '2.‘ ‘A coupling for coal feeding worms consist ing of a pair of externally threaded worm shaft mating'flutes'formed therein adapted to selec» tively position said shaft ends in a rotary direc tion, said shaft ends being oppositely threaded ends having tapered recesses formed axially in and, a sleeve having opposite ,internalvthreads ' the shaft ends and ?uted. longitudinally, a fluted‘ 10 adapted-to, receive thethreaded shaft ‘ends in a plug adapted to occupy‘ said tapered recesses manner to draw’ the shaft'ends'together when when the shaft ends are drawn together, and-a said sleeve is rotated in one direction, and force threaded sleeve adapted 'to receive said shaft ends same apart when the sleeve is rotated in the opand draw same together while they are held posite direction. , ' against relative rotation by said ?uted plug. 15 3. In a device of the class described, a combi WILLIAM M. SCHWEICKART.