US1605840A - Automatic stop mechanism - Google Patents

Description

Nov. 2 1926.

v 1,605,840 H. w. HuBERs n AL I AUTOMATIC STOP MECHANISI Fi'led March 27, 1925 4 sheets-shot 1 INVENTORB M ATTORNEY.

Nov. 2 1926. 1,605,840

H. W. HUBERS Er AL AUTOMATIC STO? EcHANIsl Filedv March 2'7I 1925 v 4 Sheptl-Shelnt 2 mvjzzvron Mm@ ML wiwi. Amway.

H. W. HUBERS El' AL Nuv. 2, 1926. l

AUTOIATIG STOP IBCHANISI 4 Shoots-Shoot 4 Filed March 27, 1925 y JGZ? w mm h.

MM5, ATTRNEY.

Patented Nov. 2, 1926.

UNITED STAT-Es PATENT OFFICE.

HENRY W. HUBERS, WALTER K. VOSSAND JOHN I-I. DIEDRICH, Of' DAVENPORT, IOWA.

AUTOMATIC s'ror Mncrranrsiyr.

Application filed March 27, 1925. Serial No. 18,763.

Our invention has reference to automatic stop mechanism, and is specially designed for use inconnection with jolting machines such as areused in foundry work, and other machines of a like character, which operate upon sandformations through a jolting or vibratory action. The purpose of said machines is to settle or squeeze the sand into every part of the mold, so that there will be no defects in the Completed casting. Thesek machines are usually operated by air, 'the flaslrwhich is supported in the machine being given a certain amount of vibratory action while positioned therein. The air which furnishes the power is controlled hy means of a valve, which is opened and closed by the hand of the operator. This is a very unsatisfactory method, for Athe reason that it is possible to injure the form by giving thereto a few less or a vfew more movements than the proper number. The number of vibrations given to the mold in this way is more likely to exceed the required amount, so that in addition to the risk of' spoiling the mold and making the same useless, there is an unnecessary amount of wear on the machine. In operating upon several hundred molds the addition of a few eXtrajolts each time would run the number of unnecessary movements up into the thousands. The chief purpose of the present invention is lto provide an auxiliary mechanism for the operation of the air valve, and other devices connected with the jolting machine in such a way as to time or measure the number of movements thereof, and interrupt the movement of the machine at the'end of a re determined number of such movements.

Another feature of the machine consists in the use of novel transmission devicesl for imparting the successive pulsations of the machine to the control devices,.and in such a way as to give a verygradual movement to auch control devices. In connection with this is a means for varying the degree of movement of such devices to malte the same conform to the kind of` work that is being done on the machine.

l The above-named, and other features and advantagesv of the invention will more fully appear from the following specification, refings, in which-.-

AFig. 1 shows a jolting machine of a con` ventional type, with the invention applied thereto.

Fig. 2 is a tached.

F ig. 3 shows the same in side elevation.

Fig. a is a rear end view thereof, partly in section.

Referring to Fig. 1 of the drawings, the reference number 1 indicates'the bodyof a` jolting machine, and 2 the table thereof, upon which the flasks are supported in order that they may be given the necessary vibratory movements, by means of air mechanism indicated at 3. At 3a is shown a pipe for the exhaust air, with the outer end of which is connected a cylindrical pulsator 4l, supported upon a pedestal 5. The cylinder a contains a piston 6,'on the. end of a rod 7,. ln proximity to the pedestal 5 is a similar pedestal 8, upon which is journaled a shaft 9, to which is fixed aratchetfwheel Adjacent to said wheel is pivotally supported an arm 11, on the outer endpof which is a pawl 12, adapted for engagement with the teeth of the wheel 10. The arm 11 is connected with the end of the rod. 7 by means of a rod 13. A coiled spring 14 is interposed between the piston '6 and endof the cylinder 4, the tension of such spring tendf4 ing toy hold the piston at the end of its inner stroke, and closing openings 15 in the wall of the. cylinder. e

Each pulsation of air. through the exhaust pipe 3 causes an impact against the piston 6, forcing the same outwardly, until it passes the openings l5, permitting the` escape of the air, and the return of the piston inwardly.' The outward movement of the. piston is imparted through the rods 7 and 13 to the arm 11, swinging the same outwardly, and causing a partial rotationof the, wheel 10. By means of successive movements of the piston an intermittent movement is imparted to the wheel 10 and shaft 9, which is in turn imparted to other mechanisms, hereinafter pointed out. yBy means of a spring stop. 16 lined to the support 8 and adapted for engagement with the 'teeth of thev wheel4 10, the

erence being had to the accompanying drawplanl view of the invention, de-

'tically movable therein. In proximity to the frame 22 is a support 23, having an arched portion 24, in which is journaled a shaft 25, on which is fixed a worin-gear wheel 26, so as to be in line with the shaft 20, and in mesh with a worm 27 on the lastnamed shaft. The movement of such shaft is thereby imparted to the wheel 26, to give a partial rotation thereto upon each intermittent action of the shaft. The complete rotation of the shaft 2O gives to the wheel 26 a movement equal to the pitch of the threads on the worm 27, so that the movement of such wheel is comparatively slow.

One side of the frame 22 is extended upwardly, as at 29, to form the support for an arm 30, pivoted thereto at its upper end, and

' provided at its lower end with a catch 31,

engaging the lower end of the carrier 2l, and holding the same normally in elevated position, with the worm 27 and wheel 26 in mesh. Accidental release of the catch 81 is prevented by means of a coiled spring 32, interposed between the arm 8O and a support 33 on the frame 22.

In one face of the wheel 26 is a circular channel 35, having an inner track 36, in which is movable the head of a pin 37, seated in an arm 38, pivoted at a central point of the wheel. The outer end of the pin 37 is threaded to receive a thumb-turn 39, by operation of which the head of the pin 37 can be caused to tightly engage the inner face of the track, to hold the arm 38 from movement with reference to the wheel. The end of said arm projects beyond the edge of the wheel, and is provided with a lug 40, for engagement with the inclined face of a projection 4l on the arm 39. Such engagement forces the arm outwardly, disengaging the catch at the lower end thereof, and permitting the carrier 2l to drop downwardly. This movement is aided by a spring 42, connecting the lower end of the carrier with the base of the machine. In its downward movement the carrier 2l moves the shaft 2O downwardly, disengaging the worm 27 from the wheel 26, interrupting the movement of said wheel. Said wheel and the shaft 25 are then returned to their former positions by means of a coiled spring 43. connected with the shaft 25 at one of its ends and with the supporting frame for such shaft at the other.

The rearward movement of the wheel 26 is limited by an arm 44, projecting beyond the edge of said wheel. and encountering a stop on the frame. The arm 44 is preferably pivoted at the center of the wheel 26, and provided with a pin 46 operating in the track 86, similarly to the pin 37. The pin 46 is also threaded and fitted with a thumbturn 47, by means of which the pin and arm L can be held in adjusted positions with relation to the wheel 26.

On one edge of the carrier 2l is a gearrack 49, the teeth of which are in mesh with a segment-gear wheel 50, on a shaft 51, f

accordance with the direction of movement t" vof the shaft.

Said air control devices are of a conventional type, and are not particularly shown herein. Communication may be made between the control devices shown at and those indicated at 3 in Fig. l, by pipe connections, such as are shown at 57 and 58 and hose connections 59 attached thereto, and connected with the mechanism at their other ends.

When the car ier 2l is at its highest point in the frame 22 and the worm 27 in mesh with the teeth on the wheel 26, the air valve is open, causing a continued intermittent movement of such wheel so long as the jolting mechanism is in operation. Upon the arm 38 being moved to a point to release the arm 30 the resulting downward movement of the carrier 2l rotates the shaft 51 in a direction to close the air-valve, and interrupt the movement of the main machine. gives an opportunity to remove one flask from the jolting machine, and position another one therein. The shaft 2O is then raised by means of a handle 60 on the end thereof until the catch 8l automatically cnl gages the lower end of the carrier again, and holds the same in elevated position. This return movement of the carier and shaft also opens the air valve and brings the worm 27 into engagement with the wheel 26 once more. The operation then proceeds as before.

In the operation of the machine the arm 38 is fixed at a point on the wheel 26 which will permit a predetermined number of pulsations in the cylinder 4, and a corresponding number of pulsations or vibrations in the jolting machine l before the arm 38 engages the lug on the arm 80. and releases the carrier 2l. The position of the arm 38 may be adjusted as occasion requires, to per- Sti This

iii)

mit a greater or less number of vibrations of the machine. The proper adjustments may be made b v means of a scale on the face of the wheel 26, as shown at 61. The posi- ISK sapesse tion 0fv the arm t. must? be mede. t0 @euforia to said scale, and adjustments can also be made in the position of the last-named arm to permit a greater movement of the arm 38, 'or a more limited movement thereof, as desired. Y

It will be observed that the wheel l0 derives its intermittent movements from the successive pulsations of the air devices, "which Vmight be imparted through some other medium than that shown herein. F or instance, a connection might be made with the impellingmeans of said wheel from the table 2 or other vibratory parts, which receive their vvibrations from such pulsations.

It will he. observed that through the coinbined movements ofthe shaft Q0 and wheel 26. it is possible to arrange for a multiplied number of movements of the vibratino mechanism before the niacljiine is stopped. For

examplegf the wheel 10` were to be provided With ten teeth a similar number of movements of the piilsating devices would be require-d to give a complete rotation to the shaft 20. This would result in a comparatively limited movement of the wheel 2G, and for ten such movements of said wheel one hundred impulses of the p ulsator and a corresponding number of `vibrations of the machine would be required. By a proper setting ofthe arm 3 8 a piece of worl; supported in the` jolting machine maybe caused to re- (eive a number of vibrations best suited thereto, and by means of which the most satisfactory results may loe obtained. By a proper adjustment of the position of the arm 3,8 onthe wheel 2,6 thehumberof vibrations may be made to suit the different classes of work which may be operated upon in the jolting machine.

Changes can beA made in the form and arrangement of the various parts of the machine without departing from thespirit of the invention, as set forth herein.

What we claim, and desire tosecure by Letters Patent, is n l. In combination with the air operating mechanism of a jolting machine, and air valve control devices operatively connected therewith, a shaft rotatably and swingingly supported at one of its ends, means for holding the opposite end of said shaft releasably in an elevated position, a Wheel mounted in proximity to said shaft, means for imparting the movement of said wheel to said shaft at a reduced rate of speed, means carried by said wheel for engaging the releas'able support of said shaft, toV releaseI the same and permit a movement of said shaft away from said wheel, means for imparting the successive pulsations of said air'operating mechanism to said shaft to give an intermittent rotation thereto, andmeans for imparting the movement of said shaft upon being released to said air valve devices,l to

close the sam-e, and interrupt thel movemen of said air operatingl mechanism. U 2. Iny combination with the controlling de-v vices for a vibratory mechanism, an automatic shut-ofi" mechanism, comprising a rotatab'le shaft, supported at one of its ends so as to be radially movable at its opposite end, a carrier for the last-named end of said shaft, supported so asl to be vertically Vmovable, a wheel rotatably mounted in proximity to said shaft, and adaptedto receive move.- menttherefrom at a reduced ratel of speed, means for holding said Vcarrier normally in an elevated position, means carried by said wheel forreleasing said last-named means upon said wheel traveling a predetermined distance,A means for releasing said carrier to permit it to Vmove downwardly, and'means for imparting thefmovement of said' carrier to said onti'olling devices, to effect a stop# page of the vibratorymechanism,

,3, In a device'of the classv described,iili cluding la rotatable shaftandtiming de vices associated therewith, mechanism for imparting intermittent moyements to said shaft, comprising a cylindrical member, adapted for connection with the exhaust of an air operated'vibratorymechanisnn and a piston and rod therefor, said cylindrical member having an exhaust vent normally closed by said piston and opened upon the same being` reci procated, and means for im? parting the movement of saidrod to said shaft vto give successive partialrotary movements thereto. i

4. In a device of the class described, in# cluding a rotatable shaft and timing devices associated therewith, mechanism for imparting intermittent movements to` said shaft, comprising a cylinder, adapted for connection with the exhaust of an air operated vibratory mechanisiri, a piston and rod for said cylinder, said cylinder having one or`- more exhaust ports normally closed by said piston, and opened upon the outward movement thereof, means for holding said piston normally with said vents closedfa toothed wheel lined on said shaft, and ratchet devices in` engagement with saidvteeth and operatively connected with4 saidpiston rod.

5. In a device of the class described, including arotatable shaft and timing devices associated therewith, a pulsating mechanism adapted to be operated bythe successiveeXL haust disc-harges of. an airaotuated,vibratory machine, and means for imparting the successive actionsV of said pulsating mechanism to said shaft, to impart'successive'parn ial rotations thereto.

6. In a device of the class described, in combination with a timing wheel and cut# out device, carried thereby, aA rotary shaft operatively connected withfsaidwheel, sofas Ji'o-impart rotation thereto at a reduced rate ofspeed, a pulsating mechanismadaptedto iio Vao

be operated by the successive exhaust discharges of an air driven vibratory machine, and means for imparting the successive movements to said pulsating mechanism to said shaft, to give thereto an intermittent rotary movement.

7. In a device of the class described, in combination With a timing Wheel and cut-out device carried thereby, a rotary shaft operatively connected With said Wheel so as to impart rotation thereto at a reduced rate of speed, power-transmitting devices adapted to be actuated by the vibratory movements of a jolting machine, and means for imparting the movements of said power-transmitting devices to said shaft, to give an intermittent rotary movement thereto.

8,. In a device of the class described, a power-transmitting mechanism, comprising a rotary shaft and toothed Wheel thereon, a pavvl mechanism adapted for the yoperation of said Wheel, to give step-by-step movements thereto, a pulsating device adapted for operation by the successive throbs of an air-actuated vibrator-y machine, and proivided With a reciprocating member, and means connecting said reciprocating member with said paWl mechanism, to suitably operate the same.

9. In a device of the class described, a rotatably mounted gear Wheel, a trip lever carried thereby, a shaft rotatably supported in proximity to said Wheel, and gearing on said shaft in engagement with said wheel, so as to impart movement thereto at a reduced rate of speed, a support for said shaft movable so as to permit a separation of said `Wheel and gearing to interrupt the movement of said Wheel, means for compelling a return movement of said Wheel upon being released, and means for limiting the return movement thereof.

10. In a device of the class described, a rotatably mounted gear-Wheel, a cut-out device carried thereby and capable of being held in adjusted positions thereon, said Wheel being provided With a scale to indicate the position of said cut-out device, a shaft supported in proximity to said Wheel and gearing thereon in mesh With said Wheel, and adapted to rotate the same at a reduced rate of speed, said shaft being supported so as to be separable from said Wheel, to interrupt the movement thereof, means for compelling a return movement of said Wheel upon being released, and means for stopping said Wheel at the point from which it started. 'A

l1. In a device of the class described, in combination with a vibratory apparatus and air-operating devices therefor, a shaft rotatably mounted, a pulsating device connected With said air-operating devices, so as to be actuated by the successive exhaust throbs thereof, means for connecting said pulsating device with said shaft, to impart thereto a succession of partialv rotations, a certain number of said exhaust throbs being required to give a complete revolution to said shaft, a timing-Wheel rotatably supported in proximity to said shaft, means for imparting the movement of said shaft to said Wheel at a reduced rate of speed, a trip mechanism carried by said Wheel and adapted to operate at a predetermined degree of movement thereof, means the movement of said wheel coincidently with the operation of Said trip mechanism, and means associated With said last-named means for interrupting the movement of said air-operating devices coincidently with the operation of said trip mechanism.

l2. In a device of the class described, in

combination with the air-operating devices of a vibratory apparatus, a shaft rotatably mounted and provided with an operating Wheel secured thereto, a pulsating device connected With said air-operating devices, so as to receive successive impulses from the exhaust throbs thereof, a means for imparting said impulses to said operating Wheel, to give recurrent partial rotations to said shaft, a certain number of such movements being required for a complete rotation of said shaft, a Wheel operatively connected With said shaft so as to be rotated therefrom at a reduced rate of speed, and a trip member carried by said Wheel and adapted to be held in adjusted positions thereon, so as to operate upon the receipt by said shaft of any desired -number of impulses of said pulsating device. j 13. In a device of the class described, a rotatably mounted gear Wheel, a trip mechanism carried thereby and capable of being held in adjusted positions thereon, a shaft supported in proximity to said Wheel and gearing on said shaft in mesh With said wheel, and adapted to rotate the same at a reduced rate of speed, means for imparting successive partial rot-ations to said wheel, means actuated by said trip mechanism for disconnecting said gearing to interrupt the movement of said Wheel, means for compelling a return movement of said Wheel upon the same being released, anda stop lever fixed to said Wheel so as to be adjusted in position there-on, and adapted to stop said Wheel at a predetermined point.

14. In a device of the class described, in combination with an air-operated vibratory machine and valve control thereof, a frame and carrier supported therein so as to be vertically movable, a shaft rotatably and svvingingly mounted at one of its ends and rotatably supported in said carrier at its other end, means for holding said carrier normally in an elevated position, a Wheel in proximity to said shaft and adapted to be driven thereby at a relatively loW rate of speed, a trip device carried by said Wheel,

for interrupting adapted to release said carrier at the end of a predetermined movement of said Wheel, separating said shaft and Wheel, and interrupting the movement of said Wheel, a gearrack carried by said carrier, a segment gear in mesh with said rack, and a shaft supporting said segment gear and operatively connected With the valve control mechanism to close the same When the carrier is lowered, and open the same upon the carrier being raised again.

15. In a machine of the class named, automatic stop mechanism, a pulsating mechanism adapted to be operated by the successive exhaust discharges of an air-actuated vibratory machine, and means for imparting the successive actions of said pulsating mechanism to said automatic stop mechanism.

16. In a machine of the class named, automatic stop mechanism, a pulsating mechanism adapted to be operated'by the successive exhaust discharges of an vair-actuated vibratory machine, `means for imparting the succeessive actions of sadpulsating mechanism to said automatic stop mechanism, and means for varying,` the degree of movement of said stop mechanism.

In testimony whereof We affix our signatures.

HENRY W. HUBERS. WALTER K. VOSS. J OI-IN H. DIEDRIGI-I.

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