US1268487A - Method of making vibrator-bodies. - Google Patents

Description

G. B. FICKOP.

METHOD OF MAKING VIBRATOR BOD|ES.'

APPLICATION FILED nEc.2|, I916.

FP'Z i v N d I b 5/5 5 3% 54 1,263,470 Patented June 4,1918.

, pair i one enonen B. onor, OF NEW Haven, oomvncricur, AssIenoa'ro THE MALLEABLE anon rr'r'rrnes COMPANY,'OF snnnnonn'connnericnr, A comzone'rronor" cons ecification of Letters Batent.

METHOD MAKING? VIBRAT OR-BODIES.

PatenteolJ 11116.4, 1918.

original application fil ed August 21, 1915, Seria1 1 To. 46,?11. pivided and this application filed December 21, 19 16 ."Seria1No.138,210.

To all whom it may concern:

Be "it known that L'GEORGE Pronor, a citizen of the United State s,' residing in the city and county of New Haven, State of Connecticut, have invented certain new and useful Improvements in Methods of Making Vibrat0r-Bodies, of which; the followis'a full, clear, and exact description.

invention relates to percussive tools and more particularlyto'vibrators of the reciprocating piston type used'in the molding art forf facilitating the reniovalof the pattern; These vibrators are usually actuated by compressed air and theirconstruction is such tliatthe pistonis rapidly reciprocated when and so long as'the'vibraton is placed in free communication with"the source of a large number of my improved'vibrators may be produced in a relatively shorttime at a very'low' cost. a

I also aim to improve the general construction and operation of devices of "the class to which the invention relates.

WVi'th these and other objects inview the invention consists in the novel features, steps and combinations of parts to'be hereinafter described and claimed In the accompanying drawing,

Figure 1 is a s ide elevationof a vibrator embodying my invention showing the means for attaching the same to the pattern board; Fig. 2 is a top plan view"o'fjthe parts shown in Fig. 1'; i

Fig. 3 is a'section on line 3 3, Fig. 1; and Figs. l, 5', 6 and 7 are sections 011 lines 4-4, 5+5, 6--6,, and 7-7otFigl 1.

n; the form shown the vibrator has a side; and'the thicker cylinder wall 1'0 is used as a sort ofai'r chestjinwhich the air passages "for connecting the cylinder" with the source of'conipressed air arefformed. Iheair chestlO ns of less length than'the vibrator body 10 owingto the fact thatthe ends of the latter are reduced and formed as cylindrical extensions 15in line withfthe cylinder 11. 'The cjaplil is screwed into'a threaded socket in one ot'the'extehsioiis l5 and the cap 13 is screwed into a threaded soclfret the other-cylinder extension, the caps being preferably interchangeable. Preferably the caps 12, 13 are an frombar stock the case illustrated a hexagonal barof somewhat less diameter than the body 10); andfthe cap or 113 has its head out mayatpne side [to form a notch lb, adapted to seat on th'e edg e of th'e' pattern board 17 in the manner shown. Y At the opposite side of the 'heacl ofthe"plug ,13 a

smallernotch 18, is formed which serves as a seat fora nut 19.

a A bolt 20, having" a screw head 21, is passed through'a hole22, cut in' 'the pattern board, and an alined hole 23, pa ssing transversely through the head of the'plu'g 13and communicating with the respective notches 161K181 This bolt'22,'e11- the nut 19, and'as the'latter is preor fitting in communication with the pressure source (not shown); Passages 25, 26 lead from the port 24, (at points adjacent the bottom of said port or pocket) to ports 27,28,,in"the'cylinder wall, and these latteraports are adapted to communicate by means of annular grooves, 29, 39 on the piston 14, with ports 31, 32. The port 31,

32 enable air to pass out of the cylinder" ducts or ' passages 33, 34 respectively which communicate with ports 35, 36 at the respective ends of the cylinder 11. The piston 14 is provided with end stops 14, 14 which are so formed as to prevent the ends of the cylinderjfrom being closed off, and a spring 14 acts on thepiston in such a manner as to normally hold the'latter against one end of the cylinder. Near the respective ends of the cylinder a plurality of exhaust ports 37,38 are cut in the thin wall 10*.

. The normal position of the piston is hown port 27. However, when the piston moves to the left the port 27,,is opened as soon as the groove 29, comes into line with it and communication is then established through port 31, duct 33 and port 35 with the lefthand end of the cylinder so that the piston is thrust to the right. The exhaust takes place through the ports 37, 38 in the usual manner, and a rapid vibration is kept-up until the air supply is cut ofl. The spring 14 normally holds the piston in such a position that it will begin to vibrate at once. The piston is reversible and the spring 14 may be used at either end of the cylinder.

In manufacturing an improved vibrator of the type shown, I take a hexagonal bar preferablyof steel and at suitable points out it down to form the reduced cylindricalextensionsor portions 15. Preferably a numberiof thevibrators will be made at once and the eccentric portions formed byturning will be twice the width of the portion 15,

so that by cutting off the bar at the centers ofthe severalcylindrical portions a plurality of vibrator bodies 10 with rounded end extensions 15, will be formed. Each vibra tor body is then bored out to form the cylinder 11,,andtheends of the cylinder are tapped forthe reception of the caps or plugs 12,13. The socket 24, is drilled in theportion'lO of the body and the ducts 25,26, 33,

34 are formed by drilling the part 10 from the respective ends. The drill holes are .on

l ag slant' so that: while thedrill may be set {off by the connecting pipe or its equivalent whenthesame is screwed into the socket to a sufficient extent tosecure it firmly in place. The several ports in the cylinderwall are formed by drilling the walls 10 10 transversely, and in the part 10 the drilled holes for both ports and ducts are partially plugged up in such a manner as to provide the described'passages or communications, as indicated by the dotted lines in Fig. 3.

The vibrator body isof such form. that it can beevenly tempered without difficulty, and I prefer to harden the vibrator in this manner. 'The device can be very accurately constructed so as to be economical in consumption, of air and powerful. in action. Furthermore-my improved vibrator while very. serviceable and durable, can be pro-, duced at very low cost by the use of commer' cial bar stock and of the automatic machinery to, whichsuch stock is well'adapted. it

wall ofthe bore; substantially as described.

2 The method of making a vibrator body which comprises drilling a longitudinal bore eccentrically through apolygonal bar, cutt ng away a portion-of the ends of the bar to produce shoulders, drilling intake ports in the thicker wall of the bore throughsaid shoulders, and forming exhaust ports in the thinner wall of the bore; substantially as described.

3. The method of makings vibrator body which comprises drillinga lengthwise bore .eccentrlcally through. a polygonal bar,

rounding off the'ends/of the bar to form reduced extensions, and drilling intake passages, inthe thicker wall of the bore from the extremities of the polygonal body portion which are adjacent the rounded off ends.

4. The method of making avibrator body which comprises cutting a length of metal from a commercial bar, drilling a longitiu dinal bore eccentrically through said length of metal so that the resulting body is thicker at one side than at the other, drilling intake passages in the thicker'wall of the body, and drilling exhaust passages in the thinnerwall of the body; substantially as described.

5. The method of making a vibrator body,

which comprises cutting a length of metal from acommercial bar of uniformcrosssection, reducing the diameter of the end portions of such length of metal so as to form shoulders, drilling a longitudinal bore through such length of metal from end to end, drilling inlet passages in the wall of the body at one side, from the aforesaid shoulders, and drilling an intermediate inlet socket With Which said passages communicate; substantially as described.

6. The method of making vibrator bodies, which comprises turning down a commercial bar at different points in the length thereof to create reduced rounded portions at different points, dividing the bar into a plurality of lengths by cutting through each of the reduced rounded portions so that a plurality of bodies are formed having reduced rounded ends and adjacent shoulders, drilling a longitudinal bore through each body, and drilling passages in the Wall of the body from the shoulders adjacent the reduced end portions; substantially as described.

7. The method of making vibrator bodies, which comprises reducing a polygonal bar Copies of this patent may be obtained. for five cents at different points in its length to create eccentric rounded portions therein, dividing the bar into a plurality of lengths by cutting through each of said eccentric rounded portions so that aplurality of polygonal bodies are formed having reduced rounded ends, drilling a longitudinal bore through each body concentrically With the eccentric rounded ends, drilling inlet passages in the thicker Wall of thebore, and drilling exhaust passages in thethinner Wall of the bore; substantially as described.

8. The method of making a vibrator body from commercial bar stock, Which comprises cutting a length of metal from a commercial bar of uniform cross section, cutting away a portion of the ends of the bar to form shoulders, drilling a longitudinal bore eccentrically through such length of metal to produce opposite Walls of unequal thickness, drilling inlet passages in the thicker Wall of the body from the aforesaid shoulders, and

drilling exhaust ports in the thinner Wall of the bore; substantially as described.

In Witness whereof, I have hereunto set my hand on the th day of December, 1916.

GEORGE B. PIOKOP.

each, by addressing the Commissioner of Patents,

Washington, D. G.

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