USRE11062E - Miter-cutting machine - Google Patents

Miter-cutting machine Download PDF

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Publication number
USRE11062E
USRE11062E US RE11062 E USRE11062 E US RE11062E
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US
United States
Prior art keywords
gage
edge
knife
bearing
gages
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English (en)
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Of Gr
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  • the object of the invention is to produce a simple, cheap, and accurately-working machine, and adapted to be adjusted readily and with certainty; and it consists in the devices and combination of devices, as hereinafter more fully set forth.
  • FIG. 1 is a perspective view of my improved miter-cutting machine, showing the position of the lever, lower rack-bar, pinion, and cutting-knives.
  • Fig. 2 is avertical sectional view of the same, the pinion and lever being in elevation.
  • Fig. 3 is a planl View showing the adjustable gages with a part of the knife and its carriage in section, the rackbar being shown in dotted lines.
  • A represents the bed of the machine, which is constructed, preferably, of metal.
  • B represents the carriage, which is constructed Yso as to move in longitudinal ways a b, and to which are attached the knives c c.
  • This frame is the upright frame supported upon the bed A, and may be, if desired, made integral with the saine.v
  • This frame consists of two corner-posts d d at each end of the frame, with a connecting-bar between the two, (indicated at C,) the upper way in which the carriage runs being formed in the overhanging ⁇ part of this bar, as shown.
  • This bar is formed integral with the corner-posts, or Inay be made independent thereof and secured thereto.
  • D D are the gages, arranged one at either end of the machine, asv shown in Fig. 3. These gages are adjustable in a curved slot formed in the bed-plate, the gages being guided in their movement by a pin projecting from the gages into the slot, with a bearing-plate connected uponv the other side, as shown in Fig. 2 at 2.
  • the gages are formed with plane faces, and the edges nearest ⁇ the cut.
  • edges of the gages nearest the ends of the frame bear against the end posts, which serve ,asa lateral support both at the upper and lower parts of the front edge to sustain the gage against the cutting action of the knife.
  • the gages have a cut-away portion at their upper ends, as shown in Figs. 1 and 2, terminating in a curved arm having av semicircular bearing-face which is in bearing contact with a projection f on the cross-bar of the frame, Thus each gage has two bearings at its inner edge.
  • c c are knives attached t0 the carriage by means ofbolts and nuts passingthrough the slots shown in the drawings by N N.
  • rlfhese slots N N are preferably made in lthe'form shown in order to allow of lateral adjustment for lthe knives.
  • the gear F is a gear or cog wheel arranged between the carriage and bedwith its cogs engaging with the rack G upon the carriage, and also with the rack H upon the bed.
  • the rack H is provided with the openings h, in order to al low any shavings or dust which may drop thereon to fall through out of the way, thereby preventing clogging.
  • the lever L is attached to the gear F in any suitable manner; but I.-
  • This projection F is circular in form and rests upon the way or guide h', h' being a horizontal way formed upon the rack I-I and holds the gear F at a proper distance from the rack.
  • I is a thumb-screw passing through the end of the gage D, and also through the slot IOO may be set outwardly beyond a right angle by withdrawing the button K from the path of the stud J.
  • rllhis stud J tends tov limit the rearward movement of the gage when the button K is in its path, the spring O tending to keep the gage in its position at right angles to the line of cut.
  • the gages DD are held at the end next to the knives by means of the springs O and against lugs ff, which lugs may be formed on the bar C.
  • each gage resting against theA projections is semicircular, as before described, and is shown at D', these circles being struck from a center directly over and in line with the inner edge e of the gage.
  • the gage is set so that this edge c, which, as described, acts with the knife to form a shear cut, is in the properposition to so actv without coming in contact with Athe knife, and as the inner end turns on its circular bearing, of which the edge e is the center, it will be seen that the relative position of the edge e and knife ⁇ remains the same no matter what angle the edge may assume.
  • the gage may turn, the center will always be the same *distance from lthe opposite face or fixed part of the frame on which it bears, and therefore always in the same relation to the path of the knife.
  • the edge e being in line with this said center, also bears uniformly the same relation to the edge of ⁇ the knife and supports the material acted upon in the same manner and to the same extent, whatever may be the angle of the gage.
  • the spring O represents the point of attachment of the spring O to the fraine, and O2 the point of attachment of the spring() to the gage.
  • the spring O can be dispensed-with and my gage will still operate; but I nd ⁇ that it works much more conveniently with the spring, as it keeps theinner ends of the gages pressed closely against their bearings.
  • the operation of my invention is as follows: The stock to be operated upon is placed upon the bed and against t-he gage D, the end of it passing through between the uprightfline c of the gage and the knife c. The knife c is then carried forward by means of thelever L, cutting the stock at the'angle indicated upon the That j,
  • a knife mov- Y ing in suitable ways, an adjustable gage provided with an edge e, arranged to act in connection with the knife to form a shear cut, a bearing on said gage having its face forming a part of a circle the center of which is in line with the edge c, and an opposite bearing therefor on the framewhereby the gage is always held in the same relation to the knife,
  • aY miter-cutting machine the combination, with a carriage arranged on a Vbedin longitudinal ways carrying a cutting-knife, of an adjustable gage provided with an edge y e, acting in connection with the knife to forni a shear cut, and having a semicircular bearing struckV from the edge e of the gage as acenter, whereby the. said gage is always in the same relative position to the cut of the knife, substantially as described.

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