US1804949A - Vibrator - Google Patents

Description

y -931. G. B. PICKOP 1,304,949.

VIBRATOR Filed April 4. 1929 Patented May 12, 1931 UNITED STATES PATENT}. O

GEORGE B. rroxor, on NEW HAVEN, CONNECTICUT, AssIe-NoR To MALIQEABLE IRON I FITTINGS COMPANY, or nnnnronn, CONNECTICUT a 1 vnmarron Application fi1ed lApri1 4, 1929, Serial No. 352,549. i

My invention relates to a vibrator, and

'more especially to a vibrator suitable for use in removing castings from boxes or flasks, and for similar purposes.

It issometimes difficult in foundry operations to remove castings from the boxes or flasks in which they are made and very often it occurs that sand, dirt or othermatter ads heres to the walls of the boxes orflasks, and must be removed usually by pounding or scraping operations As the boxes or flasks are quite often damaged in this manner, and.

it is more orless of a tedious operation,-it has been found to be more expedient to use vibrators operated by compressedair or the'like in such am'anner that the vibrators are caused to act upon thefla'skor box andshake out or dislodge the material therefrom.

In such operations, it is, of cou'rse, necessary to attach the vibrator to theflask and to remove-ittherefromas soon as the operation is completed, so that the vibrator may be success'ively used upon a number of flasks. At

thereto. Preferably, the jaw member forms Lone of the vibrator heads between which the transmitted to the attaching head largely the same time, the connection between the vibrator and flask should be such that the vibrations 'will be transmitted to the walls of the flask withoutser'ious loss of energy or power ther'ebetween, that is, the connectionshould be such that while the vibrator may befleasily and readily attached to and removed from'the flask, the latter will be properly acted on by the vibrator so that the castings, sand, or other matter will be shaken out quickly- According to the vibrator'of which may be readily attached to or detached from a flask or the like, and at the same time will bear firmly against the flask so that the vibrations will be properly transmitted vibrator casing is clamped by a number of bolts which pass through the heads andare held rigidly in place by nuts mounted on the.

ends of the bolts which are threaded.

Mounted within the casing is a vibratory ram, the blows 0r vibrations of which are through bolts; Experience has shown that secured place by any of the known methods, the metal of the securing means will after a period ofuse' become crystallized or means, although -theeffect of each distinct stroke will not be appreciable.

Generally speaking, it is an object of the invention to provide in a vibrator or thelike,

an arrangement for securing" the heads thereon which may be readily replaced upon any fracture or other failure thereof, due to-fatigue or crystallization of the material of the securing means. c V i a In a more specific aspect, the invention re-' lates to a vibrator provided with'heads which are secured to thevvibrator body and to one another by bolts, and one of the objectsof the invention is to provide in a vibrator of this type an arrangement wherein one or more of the bolts may be readily replaced when broken without the necessity of removing the nuts therefrom.

Another object of the invention is to providein a vibrator having the above improvements an arrangement for holding the bolts rigidly in place during the normal operation of the vibrator.

i where the heads are bolted to the cylinder, or I .To these and other ends, the inventionjconsists in the novel features and combinations of parts to: be hereinafter described and claimed. A

In the drawings,

Fig. 1 is a side elevational view of a vibrator embodying my improvementsitherein;

Fig. 2 is a sectio'nalview along line 2'2"of we Fig. 3 is a sectional view along line 33 of Fig- 2;

mg. 4 is a View frem' the "right hand end of the vibrator shown in Fig.1; and

. Fig. 5 is a sectional view. along line 55 of Fig. 4. v I v Referring'to the'dr'awings in which I have illustrated myinvention by showing" a preferred embodiment" of the same, the reference numberlO indicates, in general, a vibrator or pot rapper comprising a cylinder or body portion 11, provided with an eye 12, by means of which the vibrator may be supported by a crane hook or the like for handling.

Within the cylinder 11 is mounted reciprocable piston 13 of any approved form. At the ends'of the cylinder are provided heads 14 and 15 which are somewhat larger than the cylinder in order to receive bolts by means of which the heads are secured in place, as will be more fullydescribed hereinafter. Heads 14 and 15 are provided with anvil surfaces 16 and 17, which enter the cylinder to a small extent and which directly re ceive the blows from the piston 18.

The jaw member 18 is formed integrally v with the head 14 and consists of a member of substantially C-shaped form having a. jaw or opening corresponding in shape to receive the wall 19 of a flask or the like, wall 19 in the present instance being of channeled cross-sectional form. The jaw 18 comprises an upper substantiallyhorizontal portion 20, a front vertically extending side .21, a rear wall 22, and a lower forwardly projecting portion 28. When in position upon the wall of a flask or the like, the upper port-ion 20 will be. substantially horizontally disposed and will be of suflicient length to accommodate the upper edge of the flask, upper substantially horizontal portion 20 being of a length equal to or greater thanany flange commonly used upon a flask wall. Likewise in order that the vibrator may be readily placed upon such a flanged flask, it is de- 1 sirable thatthe distance between the extreme end 24 of the lower C-shaped part of the jaw and the end 25 of the front wall 21 be at least equal to the length of the upper wall 20. When these dimensions are followed, any flange will readily be received in the jaw opening which is not too long to be accommodated between the front and rear members 21 and 22 of the jaw 18.

Passing through heads 14 and 15 and se curing them rigidly to the ends of the cylinder 11 are bolts 26 upon the ends of which may be mounted suitable retaining means, such as nuts 27. The head 15 is provided with four openings 28 to receive the bolts 26 and is provided on the outer face thereof with hollow. bosses 29 which surround the bolt openings, and within which are designed to be received buffers which relieve the retaining means, in the present instance the bolts, of

, the shocksinciden-t to the operation of the vibrator.

The bolts 26 are sufficiently long to extend through hollow bosses 29, as shown i'n'Fig. 5, and to project to a suitable extent from these bosses. Mounted within each of the bosses 29 and surrounding the corresponding bolt 26 is a buffer 30 in the form of a thick washer or the like, provided with an opening 31 to receive the bolt. These buffers 7 from the cylinders.

are preferably made of solid rubber and may be of suflicient thickness to project slightly beyond the outer edge of the boss 29, as shown particularly in Fig. 5 of the drawings. In diameter, the buffers will preferably be of a proper size to fit snugly within the boss. A washer 32 is positioned uponthe bolt against the outer face of the bufier, the edges of the washer being rounded so that it will not cut into the buffer and a nut 27 being provided on the threaded end of the bolt 26. The opposite ends of bolts 26 pass through openings 33 in head 14 and mounted upon the adjacent ends of bolts 26 are washers 34 which are received in countersunk recesses 35 in head 14, washers 34 serving to support nuts 36 received upon the threaded ends of bolts 26 and in cooperation with nuts 27 clamping the heads 14 and 15 to cylinder 11.

As shown in Fig. 1 of the drawings, when the vibrator has been placed upon the flask, it will assume a position wherein the parts of the jaw will be firmly lodged and bound against the parts of the flask by the weight of the vibrator which is held in a substantially horizontal position extending outwardly from the wall of the flask so that the blows of the ram 13 may be readily transmitted to wall 19 of the flask or other article upon which the vibrator is supported.

When the vibrator has been in use any considerable length of time the continued and oft repeated shocks delivered by the piston to the jaw member through the bolts 26 will cause the bolts in time to give way and the heads to become detached or partly detached When this occurs, the work must be stopped until repairs can be made and this often results in expensive and annoying delay. The nuts mounted upon-the bolts quite often become crystallized and may not be readily detached from the bolts, and in addition if but a' single bolt fractures it becomes necessary inorder to withdraw this bolt to detach the other bolts in order that the vibrator head may be removed. This is particularly true in vibrators of the present type in which the flask or other article engag- 'ingparts of the jaw member are relatively wide, as shown in dotted lines in Fig. 4, in order to give'a firm support to the vibrator when in operative position on the flask. It is desirable that the bolts be mounted in the heads as closely as possible to the vibrator casing or cylinder and when so mounted it is impossible to withdraw any of the bolts or broken bolt parts in the direction of the jaw member, owing to the fact that the bolts will strike the flask engaging parts of this member,

for example, the flanges 20, 21, 22 and 23,

as will be readily understood from Figures 1 and 4 of the drawings.

One of the features of the present invention resides in a form of vibrator in which fractured or broken bolts may be readily removed without dismounting the remaining bolts or detaching the heads from the vibrator casing. According to the invention, laterally extending opening 37 are provided in head 14 extending into the bolt receiving openings 33 in the latter. These openings are of a width at least equal to the diameter of the bolts 26. In case one of the bolts becomes fractured, the left-hand end of the bolt, as'viewed in Fig. 1, may be withdrawn a suflicient distance in opening 33, so that washer 34 is clear of the countersunk opening 35, whereupon the bolt end may be withdrawn through laterally extending opening 37. The opposite end of the bolt may be withdrawn through opening 28 and a new bolt inserted through the latter opening and through opening 33, the new bolt being threaded through a washer 35 and nut 36, the latter being tightened to secure the bolt in place. Thus it will be seen that I have provided an arrangement in whichthe broken bolt ends may be readily and quickly removed without the necessity of removing the nuts therefrom, while the bolts are prevented from working out of place ifthey should become loosened owing to the washers 34 which are received in the countersunk openings in the vibrator head. v

While I have shown and described a preferred embodiment of my invention, it will be understood that it is not to belimited to all the details shown, but is capable of modification and variation within the spirit of the invention and the scope of the appended claim. a

What I claim is 1 In a vibrator, a casing, a vibratory piston in said casing, heads one at each end of said casing, and bolts for securing the heads to said casing and to one another, one of said heads being provided with parts in ali n- I ment with and overlying the ends of the bo ts,

said heads being provided with apertures 1 through which the bolts pass and in which the bolts are normally restricted to movement in an axial direction, the head provided with the overlying parts being provided with lateral slots extending into the bolt receiving openings through which the adjacent ends of broken bolts may be withdrawn in a lateral direction, the bolts being restricted to axial movement in the other head at'all times.

In witness whereof, I have hereunto set my hand this28th day of March, 1929.

- GEORGE B. PICKOP.

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