US342939A - smith - Google Patents

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Publication number
US342939A
US342939A US342939DA US342939A US 342939 A US342939 A US 342939A US 342939D A US342939D A US 342939DA US 342939 A US342939 A US 342939A
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Prior art keywords
log
cylinder
steam
knife
cross
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L5/00—Manufacture of veneer ; Preparatory processing therefor
    • B27L5/06—Cutting strips from a stationarily- held trunk or piece by a rocking knife carrier, or from rocking trunk or piece by a stationarily-held knife carrier; Veneer- cutting machines

Definitions

  • This invention relates to improvements in machines for cutting lumber, the object being to so construct the machine as to render it capable of cutting veneers and boards having any desired degree of thickness, to perform such cutting with great rapidity, and to act automatically during the entire operation of dissevering a log.
  • Figure 1 is a front elevation of the entire machine. machine, showing the feeding mechanism.
  • Fig.3 is a top plan view of the same, and showing in section the knife and carrier in conjunction with a log which is being cut.
  • Fig. 4 is a cross-section through the machine on the line as w of Fig. 1.
  • Fig. 5 is a diagram showing three different forms for the operative edge of the presser-bar.
  • Figs. 6, 7, 8, and 9 are detail representations of the log feeding and retracting mechanism; and
  • Fig. 10. is a view showing the knife in action on a log.
  • b is the stay-log, movable upon the horizontal bed-plate.
  • ways f f In front of the bed-plate and placed obliquely thereto are ways f f, firmly secured in position, within which slides the cross-head carrying the knife and presserbar devices in a direction diagonal to the 1ongitudinal axis of the log h upon the bed-plate.
  • the head-block to be used in my machine is shown in Figs. 1 and 2, and is designated by Fig. 2 is a rear view of the I a
  • the steam-cylinder g is also provided at each end with steam-chests g, which are con nected by a steam-supply pipe, 9 into which passes the steam coming direct from the boiler, and to one side of the cylinder 9 is secured another smaller cylinder, 0, containing a steampiston connecting with and actuating a main valve-stem, g.
  • This latter cylinder is provided with a valve-chest, 0', containing a slidevalve, which is operated by a rod, 1'.
  • the valve stem 9 passes entirely through the steam-cylinder c, and extends in either direction until its opposite ends enter the steamchests g" g, and are attached to valves within said chests, which valves'are used to admit steam alternately to opposite ends of the cylinder g, and to discharge it from the same cylinder upon the return -stroke, into an exhaust-pipe, 9', extending between the two steam-chests 9
  • the cross head which slides between the inclined waysff, as represented in Fig. 1, is composed of a knife-carrier, d, anda prcss'erbar holder, 6, the knife-carrier being provided with a knife, (I, and the holder carrying a presser-bar, e.
  • the cross-head thus composed is pro vided with side bars, ff, fitted to the ways f, as shown in Fig. 4, one of the said barsas the upper one, for instance-having preferably roller-dogs adjustably secured thereon, which are adapted to automatically engage and operate the valve-connections, while the other of the bars, as the lower one, is provided with devices for automatically engaging and controlling the feed-connections.
  • trip-lever Near each end of the upper one of the ways f is pivoted a trip-lever, r, the two being connected with one another by a rod, 1".
  • the lowermost of these trip-levers connects by a rod,.1-, with a bell-crank, r, pivoted in suitable position upon a part of the framework of the machine, and provided in turn with a rod, r, which actuates the slide-valve within the valve-chest c.
  • handle '1' governs the admission of steam to the main cylinder by connecting through rods and a bell-crank, j, with a valve located in the main steam-supply pipe
  • the handle it is pivoted to a rod, which, through the medium of appropriate levers, as it, shifts the valvestem 9 when desired, so as to stop the crosshead at any point in the stroke of the knife.
  • the stay-log b is provided with brackets b (see Figs. 3 and 4,) fashioned on their under side with grooves, which inclose tongues c, projecting from the surface of the bed-plate, in order that the stay-log may be thereby guided in its movements backward and forward.
  • brackets or braces b have bolted to their sides longitudinal gear-racks q.
  • a shaftcarrying pinions on either end, which engage with the racks q, is located transversely to the bed-plate, and is provided with a disk, q, with which a hand-lever may be used to move the stay-log independently of all other means.
  • the provision of the racks and pin ions also insures a steady movement of the stay-log at alltimes, and prevents one end from moving faster than the other.
  • Feed-screws n n are arranged above the bed-plate, their one end being upheld byboxes or holders b, secured to the brackets-b which ends bear against the stay-log, so that the rotation of the screws willfeed the latter forward, while the other ends of the feed-screws are upheld IIO by being journaled into holders t, secured to upright plates m,rigidly mounted uponthe bedplate.
  • Each feed-screw also passes through, and is further upheld by means of a bisectional journal-box having a removable upper half or nut, a", screw-threaded to fit the feedscrew, and this nut in this connection serves to keep the feed-screw in the position in which it is placed by the automaticmechanism.
  • the nut a is affixed to the upright plate m in a manner to be presently described, and between the terminal holders b and t.
  • ratchet-wheels s Upon the feedscrews, preferably between the bearingst and the nuts of, are loosely mounted ratchet-wheels s, bored to fit the outside of the screws, and provided with an inner projecting lug or key, which fits into a longitudinal groove, a, in the feed-screw.
  • levers s also fitted loosely upon the feed-screws and provided at their upper ends with pawls adapted to engage the teethwof the wheels 8, the lower ends, 8', of the levers being coupled by a cross-rod, s, so that they may operate simultaneously.
  • a rod, 8* is pivoted to the lower end of one of the pawl-carrying levers and connects it with a lever, 0, having an adjustable fulcrum, o, and actuated by means of a rod, '0, as will be presently shown.
  • the fulcrum 1) consists of a sleeve movable up and down upon a smooth cylindrical column, w, which sleeve has a socket, a, pivoted thereto, and playing upon the lever c, which is clamped in said socket by asst-screw, v".
  • the fulcrum v is adjusted to any desired point upon the lever v by means of a screw, 0 journaled in suitable bearings and passing through the said fulcrum, so that its rotation will elevate or depress the same.
  • the operator may at pleasure adjust the leverage which communicates motion to the ratchetwheels, so as to vary the thickness of the cut of the knife.
  • the lower way, f is furnished with pivoted arm 0, connected together by arod, 0, and during the movement of the cutter intermittently brought into contact with and moved, the one by the dog a and the other by the dog a", which dogs project from the lower side bar, f, of the cross-head.
  • One of the arms 0* is secured upon the end of a rock-shaft, b, which passes underneath the bed-plate of the machine, its other end being journaled in a suitable bearing and provided with a small double lever, a, to the upper end of which is connected the rod a, above mentioned.
  • lever a has a shortlever, b", which connects with and operates a bell-crank, b one arm of which is pivoted to a rod, 1"", to which it imparts a vertical oscillation, and the other arm being pivotally connected with a connecting-rod, b, extending to a spot under the opposite side of the bed-plate,where a similarlysi-tuated bellcrank is located, one arm of which latter bell-crank is pivoted to the said rod I), while the other carries a vertical vrod, r".
  • These rodsr extend up through the bed-plate alongside of the vertical plates m m.
  • Each stand or plate m has another plate, 15, secured to its inner face by means of screws or bolts 0 which latter plate is provided with an upper extension affording a bearing for the rotary crank 25, and also with a horizontal groove, 0, as shown in Fig. 8.
  • Stands m are also provided with vertical grooves r. ⁇ Vithin the horizontal groove 0 is fitted movably a casting, 0, having a horizontal flange which enters the said groove, said casting being slotted so as to slide upon the bolts 0", which serve to secure it, as well as the plate t, to the stand m,- and, further, the casting 0 is provided on its rear side with an inclined groove lying directl y opposite the vertical groove in the plate t.
  • the stand at has already been described as serving to support a bisectional journalbox th rough which the feed-screw passes.
  • the sections of this box are designated by n and n".
  • the lower section, n is affixed rigidly to the casting 0, and is formed with its interior surface smooth.
  • the upper section or half, n is screw-threaded to fit the thread .of the feed-screwn, and this section is provided with a dovetailed flange which fits into a dovetailed groove in the face of the casting 0, as shown in the plan detail, Fig. 6.
  • the section a is therefore susceptible of vertical movement, which allows it to be taken off the feedscrew or replaced thereon, and this movement is generally effected by a link, 1?, coupled to the section a and actuated by the rotary crank it.
  • the rods r" above referred to are formed upon their upper ends with a slide, 1- which is provided with an inclined tongue, W.
  • Fig. 3 the presser isshown as curved, and in Fig. 5 is given a diagrammatic representation of several forms of the presser-foot.
  • the character of the wood on which it is to be used determines which is most suitable, and obviously the presser-bar may be made in any one of numerous forms, it being only essential that it be of a form which will allow it to press firmly and rigidly against the wood near the cutting-point in such a manner as to accomplish the desired result, which will necessarily involve the presser-foots being somewhat curved, to prevent the wood breakingthat is to say, the presser-foot must be formed so that the strip which is being cut cannot bend up quickly from the log as it leaves the same, forthis would split, break, check, or otherwise injure the strip or wood; but the foot must be so formed that it will graduate the bend of the resulting strip to an easy curve from the logoutward between the presser-foot and the by the emergence of the board or, strip from between them, when this strip expands to the width it would have had if un
  • Fig. 10 is delineated the form of knife which I preferably use, and which may, if desired, dispense with the necessity of a separate presser, since knife and presser itself are combined in one device. It has a flat face, d, pressing hard against the wood, andabeveled face, 11", which separates the board from the log, the flat face (1 being slightly sloped or beveled, as at d, toward the face (1, to form the cutting-edge.
  • Such a cutting-edge obviously tends to ride upon the surface of the wood when in operation, and mustbe rigidly held and guided, so as to compress the wood adjacent to its inner side during each cut, the next succeeding cut removing such compressed wood more perfectly than if uncompressed.
  • a presser-bar or a roller is generally used in connection with this style of knife, especiallyin cutting cross-grained wood.
  • a knife-carrier sliding in inclined ways and provided with projections extending over the upper way, a main steam-cylinder containing a piston whose piston-rod is connected with the said cross-head, valve-chests located on each extremity of the main cylinder, a supplemental steam-cylinder attached to the main cylinder and carrying a valve chest, a valve-stem passing through the supplemental cylinder and having its ends attached to the valves contained within the chests of the main cylinder, and means for automatically regulating the steam-supply, so as to reciprocate the cross-head, which consists of trip-levers pivoted upon the upper of the ways and connecting with each other and with the valvein the chest of the supplemental cylinder by suitable levers, which trip-levers lie in the path of the projections upon the cross-head and are actuated thereby, substantially in the manner shown, and for the purposes set forth.
  • a carrier for the knife sliding in inclined ways a main steam-cylinder containing a piston whose piston-rod is connected with the said cross-head, valve-chests located on each extremity of the main cylinder, a supplemental steam-cylinder attached to the main cylinder, a valve-stempassing through the supplemental cylinder and having its ends attached to the valves contained within the chests of the main cylinder, and means for shifting the valve-stem by hand in order to control the movement of the cross-head at any point in the length of its stroke, which consists of a hand-lever connected by suitable rods and levers with the said stem, substantially as herein specified and shown.
  • the combination with a knife-carrying cross-head reciprocated by the direct action of steam'upon a steam-piston inclosed within a steam-cylinder and a valve mechanism for regulating the steam-supply to effect such reciprocation, of a hand-levcr and rods connecting the same with the valve-stem to shift it, and a hand-lever and rods connecting the same with the valve in the steam-supply pipe for controlling the admission of steam to the cylinder, so that by the conjunct manipulation of the two handlevers the cross-head can be governed at all points throughout the length of its stroke, substantially as represented and herein specifled.
  • the feeding mechanism is rendered adjustable for any thickness of board to be cut, said fulcrum consisting, essentially, of a socket inclosing the lever, which socket is pivoted to a sleeve adjustable upon a vertical column, substantially as shown and set forth.
  • the following elements in combination viz: the inclined ways, the cross-head sliding therein and carrying a cutter located transversely to the ways, the steam-cylinder containing a steam-piston whose piston-rod is secured to the cross-head perpendicularly to the cutter, valve-chests situated on each end of the cylinder, a supplemental cylinder secured to the side of the main cylinder, and a valve-stem within the supplemental cylinder, whose extremities are connected with the valves in the chests of the main cylinder, so that the admission of steam to the supplemental cylinder will shift the valve-stem and reciprocate the cross-head, substantially as shown and described.
  • the automatic mechanism for shifting the valvestem and reciprocating the cutter at each end of the stroke which consistsof pivoted trip-leversr 1", adapted to be brought alternately into contact with the cross-head, said levers being connected by a rod, 0- the rod 4", pivoted to a bellcrank, 0-, which actuates a rod, 0', and thereby moves a slide-valve in the chest 0 and admits steam to the cylinder 0 to shift the stem 9*, substantially as shown'aud described.
  • a retracting mechanism for withdrawing the log after each out which consists, essentially, of bisectional holders for the feed-screws, the lower section being smooth, while the. upper section is screw-threaded to fit the screws, and is rendered immovable therefrom by being provided with a rear flange, which works in a groove in ahorizontally-movable casting, and of vertically oscillatory wedges which enter inclined grooves in the said castings and are actuated to move the holders and their accompanying feed-screws, stay-log, and log by means of levers intermittently operated by the reciprocating cutter, substantially as Show n and described.
  • the combination with the feed-screws of a feeding mechanism, of boxes fashioned interiorly so as to engage the eontained lec(l-screws, which boxes serve to hold the feed-screws in any position in which their governing mechanism may place them, and which boxes are themselves horizontally movable in conjunction with the feed-screws to which they are connected, so as to change the position of the feed-screws and thus retract the log, substantially as shown and'set forth.
  • the combination, with the feed-screws, of bisectional j onrnalboxes whose lower sections are smoothly bored and mounted on a suitable standard, and whose upper sections have a screw-threaded interior for engagement with the screws, and are removable from the screws by being provided witha dovetailed flange working in a dovetailed groove formed in the supporting-casting, as shown, and for the purposes set forth.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Forging (AREA)
  • Manufacture Of Wood Veneers (AREA)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3006391A (en) * 1959-01-02 1961-10-31 Albert E Karschney Portable hydraulic veneer mill
DE102021202660B4 (de) * 2020-09-28 2025-12-11 Hyundai Motor Company Bewegungs-und verriegelungsvorrichtung für sitz und personenmobilität

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3006391A (en) * 1959-01-02 1961-10-31 Albert E Karschney Portable hydraulic veneer mill
DE102021202660B4 (de) * 2020-09-28 2025-12-11 Hyundai Motor Company Bewegungs-und verriegelungsvorrichtung für sitz und personenmobilität

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