US841644A - Machine for making fence-posts. - Google Patents

Description

PATENTED JAN. 15, 1907.

R. L. DENNISON. MACHINE FOR MAKING FENCE POSTS. PPLIQATIGN FILED APR.24, 1905. RENEWP AUG 1, 1906.

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ATTORNEYS lM/EIVTDH ROBERT L. Dswmscw .i'llmllllllllllllllllll ill N0- 8 41,644. PATENTED JAN. 15, 1907.

' R. L. DENNISON MACHINE FOR MAKING FENCE POSTS.

APPLICATION FILED APR. 24, 1905. RENEWED AUG. 1, 1906.

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R. L. DENNISON. MACHINE FOR MAKING FENCE POSTS. APPLICATION FILED APR.24, 1905. RENEWED AUG.1, 1906.

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4 SHEETS-SHEET 41 QHH MQHIH MMH 115! PATENTED JAN. 15, 1907. R. L. DENNISON. MACHINE FOR MAKING FENCE POSTS. APPLICATION FILED APR, 24, 1905. RENEWED AUG. 1, 1906.

INVENTOR ROBERT L. DENNISON ATTORNEYS WITNESSES:

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' TED STATES rnrnn orrrcn.

ROBERT L. DENNISON, OF KANSAS CITY, MISSOURI.

MAQHINE FOR-MAKING FENCE-POSTS.

Speeificationof Letters Patent.

Patented J an. 1 5, 1907.

Application filed April 24,1905. Renewed August 1, 1906. Serial No. 328,763.

To all whom it ma, concern:

Be it known that I, ROBERT LEE Denm- SON, a citizen of the United States, resldmg "at Kansas City, in the county of Jackson and parts, as will be hereinafter described and claimed.

In the drawings, Figure 1 is a top plan view of a machine embodying my invention. Fig. 2'is a partial vertical section on about line 2 2 of Fig. 1. Fig. 3 is a detail vertical section on about line 3 3 of Fig. 1. Fig. 4 is a detail vertical section drawn through the packer and the tripping devices operated thereby on about line 4 4 of Fig. 1. Fig. 5 is a side elevation, partly in vertical section, of a machine embodying the invention, such Fig. 5 being taken in the direction of the arrow No. 5 on Fig. 1. Fig. 6 is a side elevation, partly in section, of themachine, taken in the direction of the arrow No. 6 on Fig. 1. Fig. '7 is a cross-section on about line 7 7 of Fig. 8 is'a' detail side elevation of a fence-post formed by the machine. Fig. 9 is a detail top plan view of the top plate of the revolving carrier. 'Fig. 10 is a detail enlarged section showing the antifriction-bearings for the revolving Iormer, and Fig. 11 is a cross-section on about line 1111 of Fig. 10.

In carrying out the invention there is provided a carrier revolving about a vertical axis and having a series of mold-boxes whose outer halves or sections are hinged and can be opened when the latch devices are re leasedby means of certain tripping devices, and this revolving carrier presents its moldboxes successively to a packing and filling device by which the shale or other material is fed into the mold, then to a forming device, then to latch-releasing devices and to means for opening the outer sectionsor doors of the molds, and then to piercing devices by which to form the holes and seats for the wire inthe post, means being provided for properly,

timing the several operations and for locking the means for turmng the carrieragainst moving from one position to another until the operations which it is desired to effect have been completed.

In carrying out the invention I provide a foundation A, on which are mounted the posts B, which support the bed-plate O at a sulficient height above the foundation to permit the carrier to operate its molds'between the bed-plate and the foundation, as shown in Figs. 5 and 6. The foundationA has at a a step-bearing for the lower end of the carrier-shaft D, the upper end of said shaft journaling in a yoke O, mounted upon the bed-plate'C. i This shaft D, it will be noticed, forms a part 'of the carrier, and by journaling the upper and lower ends of the shaft practically fix'edbearings I am able to secure an accurate turning of the carrier within the frame, so that the mold-boxes may be presented successively in true register with the openings for the former and for the packer, as

presently described.

The carrier is, shown as provided with a bottom plate E, a top plate F, the rnoldboxes Gr, anda top or crown H, mounted on the top plate F, the latter fitting snugly within a central -opening .0 in the bed-plate C, as shown. an upwardly-projecting annular rib or flange H, which is notched at intervals at 11 ,001-

"responding ethe respective mold-boxes G,

for engagenr lit by the stop-bar I, which 0perates tolgtck the, carrier from movement when desir'edi The crown or top portion H is also providediwith notches at'h for en-';

gagement by pawlsl J. on a rack-ring J, which encircles the top portion of the carrier and may be moved in the direction of the arrow in Fig. 1 -to turd the carrier in a correspond- The crown His provided withing direction by the operation of the rack- 5 bar resently described, but may be moved in t e reverse direction without disturbing the position of the carrier, as will be understood from Figs. 1 and. 5, the operation of the rack-bar J being effected through a cylinder and piston, as shownin Fig. 2, as will be more fully described.

. The mold-boxes G are made with the inner halves or sections G, fixed to the main frame ot the carrier, and with the outer halves or sections G which are hinged at G (see Fig.

I Fi 6 and to befreed from such engagement be ore the mold-box reaches the. position shown at the bottom of Fi 7 by the engagement of the lower end of t e rod K upon the inclined tripping device K, whereby to push the rod K up and to force its latch projections from engagement with the lugs K on the nold-section G so the opening device may operate to open the section G as illustrated in Fig. 7 of the drawings. This opening device'is shown as a'lever L, pivoted at L between'its ends, .sactuated at one end by a spring L to cause its other end L to occupy t e position shown in Fig. 7, in which it will engage a projection L on the outer side of the mold-box section G and open the moldbox after its latch devices have been released by the operation before described. As the mold-box travels by the movement of the carrier past the opening-lever L, such moldbox will be spread wide open in order that the formed fence-post may be exposed to the action of the iercing devices M (illustrated in Figs. 6 and 7) and including the upright bar M, provided on its inner. side with the projecting spikes or points M arranged to enter the formed posts, together with means whereby the piercing-b ar M may beactuated in both directions. These preferably include rack-bars M projecting horizontally outward from the bar M and meshing with toothed pinions M, which in turn are meshed tion to move the operate upon the by rack-teeth on an u right rack-bar M with which is connects one end of a lever M, pivoted between its ends at M, having its 1puter end actuated by a spring M norma whic the piercing-bar isretracted and arranged to be operated in the reverse direcfpiercing-bar inwardly to ence-post by the engagement 'of the cross-head presently described, upon the inner end M of the lever M, when said cross-head approaches its lowermost position, as will be more fully described here- I have now described the means for present the mold-boxes successively to the packing and forming devices, and to open said mold-boxes and to subject the formed osts therein to the action of piercing devices for the purpose of producing the openings shown at m in the fence-post, (illustrated in Fig. 8,) such openings being useful for attaching' the wires of the fence, as will be understood by those skilled in'the art.

It should be understood that the interiors of the mold-boxes are conformed to the post which it is desired to produce, and therefore to the position shown in Fig. 6, in

taper from end to end, and for convenience in operation are arranged with their larger ends uppermost.

The material is supplied from any.v suitable pug-mill or other suitable mixing-means or a pliance to a box or hopper N and is fed t ence through an opening N in the bedplate C to the mold-box G by the action of the acker O, which is in the form of a screw, as sliown, and has its shaft O movable vertically, so the screw may rise and fall in the operation of the machine. This screw 0 is operated from an electric or other'motor P, mounted on a platform Q, supported by posts Q above the bed-plate O, and this electric or other motor may be controlled by suitable switch mechanism from a lever P, whose outer end is arranged for engagement by the upper end of the shaft 0 of the packer, so that when the packer rises to its uppermost osition its shaft 0 will trip the lever P an stop the motor P, the shaft of the motor being geared with a bevel-gear 0 through which the shaft 0 may move longitudinally, and which is keyed to the said shaft, so that the shaft 0 will be operated by the turning of the gear O in the operation of the invention.

In the operation of the invention when the packer O rises to its uppermost osition it trips its motor P, and the devices or moving the mold-carrier are operated to move the same, so that the packer 0 will rest at its lower end at k upon the upper surface of the "top plate of the packer-carrier and will be supported thereon until the next mold-box is presented in position to be filled through'the' opening N. The packer will then dro by gravity through the opening N and wil operate upon the material until the mold-box is filled, WllGIltllB continued revolution of the packer will cause the same to ride upwardly out of the mold-box and trip its motor to stop the revolution of the packer until the latter again dro s by gravity into the next succeeding mol box. When the packer rises to its uppermost position, as shown in Fig. 4, it operates upon one arm R of a bellcrank lever, which is pivoted at Rand. whose other arm R en a es at R the safety-bar R, which is movab e ongitudinally to the position shown in Fig. 4 by the action. of a spring R in which position the bar R bears beneath the fixed arm S of the bell-crank lever for operating the valve S, controlling the admission of steam to the-cylinder S for feeding the mold-carrier step by step in the operation of the invention, as presently described. When the bellcrank lever is rocked by a further upward movement of the packer" beyond the position shown in Fig. 4,. it will draw the safety-bar R out from beneath the arm S of the bellcrank lever for operating the valve,

and said arm S may be forced down upon the spring supporting red of the safety bar,

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which movement will be sufficient to shift the valve S (shown in Fig. 2) inorder tosecure the reverse movement of the iston in the cylinder S as will be more ly described hereinafter. The purpose of this construction is to prevent any movement of the devices for feeding the mold-carrier step by step until the packer has completed its packing operation and is moved u wardly clear of the mold-box in which it as just effected the packing operation as desired.

After the plastic material has. been packed in the mold the latter is shifted from the packer to a position in alinement with the former T, which is directly beneath an opening T in the bed-plate O, the former operating through the openingT and acting upon the plastic material in the mold With a pierc'- ing and a drilling action in such manner as to secure a compression and packing of the material within the mold, so that there will be produced a molded post whose walls will be of uniform density and thickness, ayoiding all inequalities of material which would have a tendency to cause cracking or other injury to the fence- 0st in burning the same. To this end I ma e the former T tapered toward its lower end or point, provide on said former a spiral rib or thread t, and support the said former so it may be rotated in operation and may be fed down and up in the operation of the machine. To this end I journal the former T at its upper end in a cross head U, which is guided and moves up and down on the uprights Q and supports gears U and U the gear U being k -yed upon the former T and the gear U being keyed upon andmovable longitudinally along a shaft U which journals at its lower end in the bed-plate C and at its upper end in the top plate Q and is provided with a bevel-gear U which is meshed with a bevel-gear U on the shaft of a suitable motor U, whose switch-operating lever U is provided with a depending rod U", arranged to be engaged by the cross-head U as the latter ap roaches its uppermost position in order to t now the motor U out of operation when the former is out of the moldboxes.

The former T and the cross-head U are moved up and down by means of a piston operatin in a cylinder V, mounted on the top )late Q and having its valve-chestV entered tained by a gland T screwed in the socket T and surrounding the piston-rod V balls T and T bearing, respectively, above and-below the head V and reducing friction in the revolutions of the former T, as will be understood from Figs. 5 and 10 of the drawings. Thus in operation the former T is raised and lowered by one set of mechanism and is revolved by another set of mechanism and automatically operates to cut the said mechanism into and out, of operation at the proper moment;

It is also desired to control the operation of i the rack-bar for givingv the mold-carrier a step-by-step movement by the positions of the former T, so that the mold-carrier will not be iven its advance movement until the former as been raised clear of the mold-box, In securing this result I provide a safety-bar 1", similar to the bar R and havinga spring r operating upon the rod extending from the safety-bar W, the bar r having ashoulder r arranged for engagement by a catch on a rod extending from an arm r of a bell-crank lever 1', whose other arm 1* is connected with a vertical slide-rod 1", (see Fig. 3,) on which is adjustablysecured a pawl or projection 1, which is engaged by the cross-head as the latter approaches its uppermost position, so the cross-head will operate to lift the rod r to cause the bell-crank lever 1*, through the connections described, to move the safety-bar r from beneath the bell-crank arm S, (see Fig. 2,) to permit the said arm S to lower in the operation which will presently be described.

As shown in Fig. 2, the safety-bars R and 1"? o erate beneath the armS ofthe bellcran lever S This bell-crank lever has an upwardly-projecting fixed arm S a fixed arm S, extendingtoward the cylinder S and a fixed arm S extending in the o 'posite-direction from the arm S, the arm inclining upwardly toward its free end and being ar- ICC ranged for engagement by a cam or projecy a pitman V from a rocker V which con-f 1 devices before described. I also provide the nects with a depending rod V, having an up I rack J with a cam J 3, bearing beneath the 120 1 per shoulder or pro ection V ,and a lower lockrng-bar I and arranged to release the shoulder or projection V, which are engaged b" the cross-head near its 11 er and lower same from engagement with the locking-ring H at the upper end of the carrier preliminary positions in order to operate the valve (not to moving the carrier by the operation of theshown) in the chest V to shift the same to rack-bar J. Thus in operation the convenr25 admit steam or other power to the cylinder tional exhaust-port functions as a steam- V in order to raise and lower the former T port, and when the partsv are in the position and its crosshead. The piston-rod V has at shown in Fig. 2 it will be noticed that the its lower end a head V operating in a socket T in the upper end of the former T and resafety-bars are both beneath the arm S of the bell-crank lever, and the valve is shifted 55 the mold-boxes, a lock for holding the car- &

to admit steam to the right-hand end of the cylinder S The cam J is also beneath the locking-bar I and in position to raise the said bar clear of its notches. The steam operating in the right-hand end of the cylinder S will now force the piston in said cylinder to the left and the rack-bar J will travel to the left, moving with it the carrier to the extent of one step, and the cam )rojection J will ride upon the pressure-bar g and depress the same, putting its spring S under tension; but the bell-crank lever will be held from movement by the safety-bars R and r until the latter are withdrawn by means previously described. When these bars R and 1" are withdrawn, the spring 8, being under tension, will force the beil-crank arm S down, thus 0 crating the bell-crank to shift the valve d to the left and admit steam to the left-hand end; of the cylinder, so. the piston will be forced to the light, carrying .with it the rack-bar on its return stroke, and such bar will return the rack-ring to position to bring its pawl into engagement with the proper notches in the mold-box carrier, and the movement of the rack-bar to the right will by the cam projection operating upon the bell-crank arm S shift the valve S to the position shown in Fig. 2, and the piston will be quickly forced to the left, operating to turn the carrier one step and bringing its cam projection to a point where it bears on the pressurebar and the further shifting of the.

valve will be delayed until the safety-bars have been both withdrawn, as before de scribed. ,It will thus be noticed that I provide for shifting the mold-box carrier step by step at intervals and also provide means whereby to control such shifting of the moldbox carrier by means of the packer and the former arranged and operating as fully set forth'in the previous description.

What I claim is 1. The combination substantially as herein described, of the foundation, the bed-plate above the same, the top plate above the bedplate, posts supporting the bed-plate from the foundation, posts supporting the top plate from the bed-plate, the mold-boxes arranged between the berhplate and foundation and having hinged sections or doors at their outer sides, locking devices for securing said doors, tripping devices for releasing the locking devices, a carrier movable between the bed-plate and foundation and supporting rier from movement, step-b step devices for moving the carrier and inc uding a rack-bar having a cam for releasing the carrier-lock, a cam or projection for operating the valverockeror bell-crank lever, and a piston and cylinder for operating said rack-bar, the valve for the cylinder and the rocking bell-crank lever for operating said valve having a springpressed pressure-bar, safetybars for restraining the movement of said valve-rocker or bell-crank lever, a packer for filling the moldboxes, a former for operating upon the material supplied to the said mold-boxes, intermediate devices between said packer and former and their safety-bars, whereby the movements thereof may operate the safetybars forthe valve-operating rocker, a device for piercing the molded article and intermediate devices between said. piercing devices and the former whereby the movement of the piercing devices is timed relatively to the said former, substantially as and for the purposes set forth.

2. The combination with a suitable framing, of a carrier journaled vertically therein, vertically-disposed mold-boxes supported by said carrier, a packer extending into and filling said mold-boxes, a former for operating for, a former movable longitudinally within the mold-boxes, means for moving the former longitudinally, a cross head supporting the former, gearing carried by the cross-head for turning the former, and means for operating said gearing to effect the turning of the former, substantially as and for the purposes set forth' 4. The combination of a mold-box having a laterally-opening door and a former r-evolving and moving longitudinally in said box, the diameter of'the former being sub stantially smaller than that of the box whereby the former may pack the molded material laterally toward the mold-box.

5. A machine for molding plastic articles, comprising a mold-box, having a laterallyopening door and a tapered spiral former operating therein for boring out the center and building up the walls of a molded article in said box, the diameter of the spiral former being substantially smaller than that of the box whereby the former may pack the molded material laterally toward the mold-box.

. 6. The combination in a machine for molding plastic articles, of a carrier revolving on a vertical axis and having a series of moldboxes comprising fixed inner sections and" hinged outer sections or doors, locking devices for securing said doors and projecting downwardly below the carrier, tripping devices bclow the carrier for releasing thelocking devices and a device along the outer side of the carrier in position to abut and open the hinged doors of the mold-boxes subsequent to the release of the locking device therefor, substantially as set forth.

7. The combination of a mold-box having an outer hingedsection ondoor, means for locking the dooryfmeans for releasing the door, means for opening the door subsequent to the .unlocking thereof, a piercing bar and means operating the pinions whereby to move the piercing-bar toward and from the mold-box, substantially as set forth.

8. In a machine for molding plastic artiticles comprising a bed-plate, a top plate supported from the bed-plate, mold-boxes arranged below the bed-plate and having hinged sections or doors at their outer sides, locking devices for securing said doors, tripping device or releasing the locking devices,

- a device .ranged alongside the path of the mold-boxes in position to engage and open the hinged doors thereof, and a perforating device arranged to pierce the molded article in the mold-box after the door thereof has been opened, substantially as set forth.

9. In a machine substantially as described,

the combination of amold-box having an inner'fixed section and an outer movable section or door, vmeans for opening the outer section of the mold-box, and a piercing device for piercing the molded article within said open mold-box and operating opposite the fixed mpld-box section, substantially as set forth.

- 10. The combination with the mold-box having a movable section or door, a lock for the door, means for releasing the lock, a spring-actuated bar for opening the door, and a piercing device for piercing a molded article within said box when the door is opened.

11. The combination of-a sectional moldbox, a piercing device including a bar extending longitudinally alongside the said mold-box, laterally-extending racks connected with said bar, an upright rack, pinions meshing with said upright and lateral racks, and means for operating the upright rack, substantially as set forth.

12. The combination with a mold-box, of a. piercing device including a bar extending longitudinally parallel with the said moldbox, and providedwith piercing projections, and racks and pinions for moving the said bar toward and from the mold-box, substantially as set forth. t

'13. The combination of a revolving carrier, mold-boxes supported thereby and having doors at their outer sides, means for look ing the doors, means below the carrier for releasing said locking devices, and means along the outer side of the carrier for opening the doors, subsequent to said unlockii g operation.

14. The combination of the mold-boxes divided longitudinally into sections, upright locking-bars for said sections, an abutment for engagement by said locking-bar, whereby to release the same, and a carrier for the mold-boxes whereby to bring the lockingbars thereof into engagement with the re- Teasing-abutment.

15. Thecombination of the carrier provided with mold-boxes divided longitudinally into sections, means for feeding the said carrier step by step, locking-"bars for the sections of the mold-boxes,- an abutment for engagement by the said locking-bars to release the latter, an opening device for openiercing the molded article within the moldox, the abutment, the opening device, and the piercing device being arrangedin position succeeding each other, whereby the carrier will present the mold-boxes to the abutment, the opening device and the piercing device in the order named.

16 The combination with the horizontal bed-plate having openings for a packer and a former, and the carrier having verticall disposed moldboxes operating beneath t e said bed-plate and registering with the said openings, of means for feeding the carrier step by step, a packer for, filling the moldboxes, and a former for operating upon the material Within the said mold-boxes, sub- 7 stantially as set forth.

17. The combination with the revolving carrier and its mold-boxes, of the piercing device, means for operating said piercing device including an arm projecting into the path of a cross-head, a former for operating upon the material in the mold-boxes, and a reciprocating cross-head in connection with said former and arranged to engage and actuate the arm for operating the piercing device, substantially as set forth.

ing the mold-boxes, and a piercing device for ioo 18. The combination with the carrier and I its mold-boxes, of a packer for filling the boxes, a former for operating upon the material in the boxes, a piercing or perforating device for operating upon the molded articles, and means for moving the carrier step by step whereby to present the mold-boxes successively to the packing, former, and piercing devices, substantially as set forth.

19! The combination of suitable framing, a carrier having the mold-boxes and provided With an upwardly-projecting annular rib notched at intervals for the locking-bar, means for moving the carrier step by step including a reciprocating bar and connections between the same and the carrier, and means whereby the said reciprocating bar may release the locking-bar from engagement with the rib or flange of the carrier, substantially forced longitudinally by the material filled into said boxes, a motor device for operating said packer, and means whereby the movement of the packer by material filled in the box will throw the motor device out of gear, substantially as set forth.

21. The combination with a revolving carrier, and its moldboxes, and a former for operating upon the material supplied to said mold-boxes, of means for moving the former lon itudinally, means for turning the former, an means whereby the longitudinal movement of the former may control the operation of its turning and longitudinally-moving devices, substantially as set forth.

22. The combination in a machine for molding plastic articles, of the mold-boxes, a tapered spiral former movable longitudinally into said'boxes, a cylinder above and having its piston-rodv connected with the former for moving the said former longitudinally and means for turning the former, substantially asset forth.

' 23. The combination with the revolving carrier, and its mold-boxes, the packer and the former, of devices for movin the carrier step by step and including a rac -bar, a piston and cylinder and valve-operating devices in connection with said cylinder and including a bell crank lever having a rocker provided with an arm and a pressure-bar overlying said arm, and arranged for operation by the rack-bar, safety-bars movable to and from a position beneath said arm andits overlying pressure-bar, and intermediate devices between said safety-bars and the former and packer, whereby they may be controlled respectively by the said packer and former, substantially as set forth.

24. i The combination in a machine for molding plastic articles, of the carrier, means for moving said carrier step by step and including a rack-bar, a cylinder and valve-operating'devices including a rocker having a bell-crank arm and a pressure-bar overlying the arm, and arranged for operation by the rack-bar, and a safety bar or bars movable to and from position beneath the arm of the bellcrank rocker, substantially as set forth.

25. The combination of a revolvlng carrier and 1ts mold-boxes, a packer operatmg vertically in said boxes and arranged to dropby gravity into the boxes and to be fed upwardly by the acciunulating material'in said boxes, motor devices for revolving said packer, and means whereby said motor devices may be thrown out of operation by the packer when the latter reaches its upper position.

ROBERT L. DENNISON.

Witnesses: I

SoLoN C. KEMON, PERRY B. TURPIN.

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