US257060A - pabkhubst - Google Patents

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US257060A
US257060A US257060DA US257060A US 257060 A US257060 A US 257060A US 257060D A US257060D A US 257060DA US 257060 A US257060 A US 257060A
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Prior art keywords
wheel
index
pawl
block
lever
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/143—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a stationary axis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/6492—Plural passes of diminishing work piece through tool station
    • Y10T83/6499—Work rectilinearly reciprocated through tool station
    • Y10T83/6508—With means to cause movement of work transversely toward plane of cut
    • Y10T83/6515—By means to define increment of movement toward plane of cut
    • Y10T83/6518—By pusher mechanism

Definitions

  • My invention relatesto a head-block which can be readily attached to any carriage; and my invention consists broadly in combining the index, the ratchet,fand the brake-wheels in one, as clearly set forth hereinafter, and shown in the drawings, in which- Figure 1 is a perspective view, showing the frame ofthe block or set-works secured to the timbers of a carriage, and showing one ot' the knees.
  • Fig. 2 is a side view of part of the operating-lever and the 'device for keeping the Fig. 3 is a top view of the block, and Fig. 4. is a side elevation of the saine.
  • Fig. 5 is a side elevation of partofthe wheel, showing the ratchetteeth on the under side of the rim.
  • Fig. 1 is a perspective view, showing the frame ofthe block or set-works secured to the timbers of a carriage, and showing one ot' the knees.
  • Fig. 2 is a side view of part of the operating-le
  • FIG. 6 is a detail view, showing a portion of the wheel, the index, and a portion of the shaft.
  • VFig. 7 is a detailview ofthe upper end of the index, showing the rib which engages with the index-teeth.
  • Fig. 8 is a view of the wheel, and adjacent parts from the inner side.
  • A represents the frame, which is connected to the carriage-timbers substantially as shown in Fig. l.
  • B is the main shaft, which has journal-bearings in suitable boxes,-O O, secured tothe frame. Keyed to this Vshaft is a bevel cog-wheel, D, engaging with a similar Wheel, E, keyed to the end of the counter-,shaft F, having journalbearing in boxes G G, secured to the frame.
  • Ohnhthe shaft Fis the Wheel ⁇ H, lever I, index .IQ/collar K', and band-wheel L. (See Fig. 1.)
  • the lever I and index J are loose upon the shaft, so that they do not necessarily turn with it.
  • the wheel H has spokes M and a rim, N, with a flange, M'. On the outer vertical face of the rim N are index-teeth N8.
  • the index J is located on the outer side of the wheel, and it has a rib, o, (see Figs. 6 and 7,) ⁇ for engaging with the index-teeth.
  • the index terminates in
  • the collar K is between the index and the journal-box of that end ofthe shatt, and its office is to keep the index up close against the wheel.
  • Q is an arm secured to the frame A infront 6o of the wheel.l It has an inclined side ⁇ against which the index strikes, and it also has notches R R', which engage with the rib 0 0f the index, as hereinafter set forth.
  • a safety-cam, S Secured to the frame behind the wheel is a safety-cam, S, its purpose being to disengage the index from the wheel to avoid all danger of breaking the teeth should the wheel be turned backward too far-as, for instance, in rolling on a heavy log, when it strikes the knees their tendency to retreat ⁇ will cause the backward rotation'of the shaft B, which would act in turn on the counter-shaft F and consequently on the wheel H and it is desirable that the parts should thus give way to a heavy sudden strain of this kind upon the knees,for it avoids danger of breakage of the parts.
  • the brake By applying the brake to the wheel the parts will be keptfrom moving backward too far.
  • the rim N outside the ange M' is made 30 smooth and forms the bearing-surface for the friction-strap brake T, connected by one end to the frame A, (see Fig. 4,) and by the other end to the inner end of the lever U, which is fulcrumed to a standard, U', secured to and 85 extending upward from the frame A.
  • the lever is notched or serrated on its upper edge or face so as tobe engaged and held to any adjustment by a pawl or dog, V, pivoted t0 the frame. (See Figs. 3 and 4.) 90
  • ratchet-teeth N' On the inside of the rim N are ratchet-teeth N', which may be engaged by either member of a reversible pawl, I', pivoted to the lever I, and thus the wheel can be turned by the lever I in either direction, and consequently the Q5 shafts F and B, which cause the backward or forward movement of the knees.
  • the pawl is reversed by means of the handle N3.
  • N3 (see Fig. 2) is a block rigidly secured to or forming a part of the same rivet or bolt as vthe pawl on the other side of the handle, and
  • N'l is a spiral spring surrounding the stem of the cam between thelugs, which holds the cam in contact with the block.
  • W is a guide-bar for the lateral support of the lever. It is secured to the frame by its opposite ends,'and on it is a stop, W', which may be used to limit the forward movement of the lever.
  • 'X is a ygage-bar secured to the fram'e, having a stop, V, with a set-screw, Z'. This bar is marked oft' into inches and parts thereof.
  • the pawl is then thrown into engagement with the wheel and the parts l turned forward, which moves the log up to the saws; or, if the logis to be moved from the saws, the other member of the pawl is thrown into engagement with the wheel, and the parts moved backward,(thebrakeofcourse having been removed, or partially so, as desired.)
  • the hand-wheel L which isvkeyed. to the outer end of the shaft F for that purpose.
  • the stop Y is iirst moved to the numeral l on' ⁇ the gage-bar and secured there by the set-screw, when the index, being in front of the stop, is brought back until it comes against the stop, when Vit is engaged with the teeth'of the wheel.
  • the wheel is moved forward until the rib on the index engages with the notch R in the arm Q, which stops the forward movement of the wheel, for it will still be engaged by the index. This will movethe log toward the saws one inch, and the operation can be repeated as often as desired; and if it is desired to cut a thicker or thinner board the stop Y would be accordingly adjusted on the scale-bar and the index movedup to it each time.
  • the com bined index, ratchet, and brake-wheel in combination with suitable lever,index, and brake, as set forth.
  • the wheel H In ahead-block for saw-mills, the wheel H, with rim ⁇ N, ratchet-teeth N', and indexteeth N8, in combination with arm J and lever I, carrying ⁇ reversible pawl, substantially as and for the purpose set forth.
  • the index, ratchet, and brake-wheel combined in one, in combination with alever, I, having reversible pawlI, an index, J, and a brake, T, to receive the rebound, all substantially as specified.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rehabilitation Tools (AREA)

Description

(No Model.) 3 Sheets-Sheet 1.
DPARKHURST.
Y HEAD BLOCK FOR SAW MILLS. No. 257,060. Patented Apr.25,1882.
(No Model.) 3 Sheets-Sheet D. PARKHULST.
BLAD BLOCK FOL SAW MILLS.
No. 257,060. Patented Apr.25, 1882.
J L D I (No Model.)
3 Sheets--Sheet 3. D. PARKHURST. l
HEAD BLOCK FOR SAW MILLS.
Patented Apr. 25, 1882.
N. PUERS. mamumgnpmr. washington D.
pawl in any one of three positions.
UNITED STATES vPATENT OFFICE.
DARIUS PARKHURST, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF TO GEO. H. KNIGHT, OF SAME PLACE. 4
VHEAD-BLOCK FOR SAW-MILLS.
SPECIFICATION forming part of Letters `Patent No. 257,060, dated April ,25, 1882.
(No model.)
To all whom it may concern Be it known that I, DAEIUs PARKHURs'r, of the cit) of St. Louis, in the State of Missouri, have invented a certain new and useful Iniprovement in Saw-Mill Head-Blocks, of which the following is a full, clear, and exact description, reiei-enee being had to the accompanying drawings, forming part of this specification.
My invention relatesto a head-block which can be readily attached to any carriage; and my invention consists broadly in combining the index, the ratchet,fand the brake-wheels in one, as clearly set forth hereinafter, and shown in the drawings, in which- Figure 1 is a perspective view, showing the frame ofthe block or set-works secured to the timbers of a carriage, and showing one ot' the knees. Fig. 2 is a side view of part of the operating-lever and the 'device for keeping the Fig. 3 is a top view of the block, and Fig. 4. is a side elevation of the saine. Fig. 5 is a side elevation of partofthe wheel, showing the ratchetteeth on the under side of the rim. Fig. 6 is a detail view, showing a portion of the wheel, the index, and a portion of the shaft. VFig. 7 is a detailview ofthe upper end of the index, showing the rib which engages with the index-teeth. Fig. 8 is a view of the wheel, and adjacent parts from the inner side.
A represents the frame, which is connected to the carriage-timbers substantially as shown in Fig. l.
B is the main shaft, which has journal-bearings in suitable boxes,-O O, secured tothe frame. Keyed to this Vshaft is a bevel cog-wheel, D, engaging with a similar Wheel, E, keyed to the end of the counter-,shaft F, having journalbearing in boxes G G, secured to the frame. Ohnhthe shaft Fis the Wheel` H, lever I, index .IQ/collar K', and band-wheel L. (See Fig. 1.) The lever I and index J are loose upon the shaft, so that they do not necessarily turn with it. The wheel H has spokes M and a rim, N, with a flange, M'. On the outer vertical face of the rim N are index-teeth N8. The index J is located on the outer side of the wheel, and it has a rib, o, (see Figs. 6 and 7,)`for engaging with the index-teeth. The index terminates in a handle for moving it, when desired,
and its lower portion is made thin, so as to act as a spring to keep the rib 0 in engagement with the teeth, and at the same time to allow it to be disengaged therefrom, when desired, by a side strain. The collar K is between the index and the journal-box of that end ofthe shatt, and its office is to keep the index up close against the wheel.
Q is an arm secured to the frame A infront 6o of the wheel.l It has an inclined side` against which the index strikes, and it also has notches R R', which engage with the rib 0 0f the index, as hereinafter set forth. y
Secured to the frame behind the wheel is a safety-cam, S, its purpose being to disengage the index from the wheel to avoid all danger of breaking the teeth should the wheel be turned backward too far-as, for instance, in rolling on a heavy log, when it strikes the knees their tendency to retreat `will cause the backward rotation'of the shaft B, which would act in turn on the counter-shaft F and consequently on the wheel H and it is desirable that the parts should thus give way to a heavy sudden strain of this kind upon the knees,for it avoids danger of breakage of the parts. By applying the brake to the wheel the parts will be keptfrom moving backward too far.
The rim N outside the ange M', is made 30 smooth and forms the bearing-surface for the friction-strap brake T, connected by one end to the frame A, (see Fig. 4,) and by the other end to the inner end of the lever U, which is fulcrumed to a standard, U', secured to and 85 extending upward from the frame A. The lever is notched or serrated on its upper edge or face so as tobe engaged and held to any adjustment by a pawl or dog, V, pivoted t0 the frame. (See Figs. 3 and 4.) 90
On the inside of the rim N are ratchet-teeth N', which may be engaged by either member of a reversible pawl, I', pivoted to the lever I, and thus the wheel can be turned by the lever I in either direction, and consequently the Q5 shafts F and B, which cause the backward or forward movement of the knees. The pawl is reversed by means of the handle N3. Y
To keep either member of thereversiblepawl in contact with the wheel, or to keep the pawl out ot'engagement with the wheel altogether, I employ the following device.
N3 (see Fig. 2) is a block rigidly secured to or forming a part of the same rivet or bolt as vthe pawl on the other side of the handle, and
having a notch in the center of its lower end. Against this lower end of the block bears a V-shaped cam, N4, whose stem N5 works in lugs NG on lthe lever.
N'l is a spiral spring surrounding the stem of the cam between thelugs, which holds the cam in contact with the block. When the pawl is out of engagement with the wheel the cam rests in the notch of the block, and when either member of the pawl is in engagement with the wheel the opposite lower edge of the block bears against the inclined face of the cam, (see dotted lines, Fig. 2..)
W is a guide-bar for the lateral support of the lever. It is secured to the frame by its opposite ends,'and on it is a stop, W', which may be used to limit the forward movement of the lever.
'X is a ygage-bar secured to the fram'e, having a stop, V, with a set-screw, Z'. This bar is marked oft' into inches and parts thereof.
- The operation of the'machine is as follows: Before rolling a log onto the carriage the pawl is thrown out of engagement with the wheel, and the index is also thrown out of engagement with the wheel by engaging it with notch R of the arm Q, and the brake applied. Then when the log strikes the knees they will be allowed to give slightly, together with the other parts, asand for the purpose set forth. The pawl is then thrown into engagement with the wheel and the parts l turned forward, which moves the log up to the saws; or, if the logis to be moved from the saws, the other member of the pawl is thrown into engagement with the wheel, and the parts moved backward,(thebrakeofcourse having been removed, or partially so, as desired.) Generally when a log is being slabbed which does not require a careful adjustment it would be quickerto move it by means ofthe hand-wheel L, which isvkeyed. to the outer end of the shaft F for that purpose. When the hand-wheel is thus used the pawl andindex are thrown out ofengagement with the wheel.
l will now suppose that the log has been slabbed andemoved up tothe saws, and that it is desired to cut a one-inch board therefrom.
The stop Y is iirst moved to the numeral l on'` the gage-bar and secured there by the set-screw, when the index, being in front of the stop, is brought back until it comes against the stop, when Vit is engaged with the teeth'of the wheel. Next, the wheel is moved forward until the rib on the index engages with the notch R in the arm Q, which stops the forward movement of the wheel, for it will still be engaged by the index. This will movethe log toward the saws one inch, and the operation can be repeated as often as desired; and if it is desired to cut a thicker or thinner board the stop Y would be accordingly adjusted on the scale-bar and the index movedup to it each time.
that in the drawing back the lever each click of 8o the pawl will represent such movement, and thus the distance may be measured by the ear.
' The brake is-not only useful when the log.
is being rolled on, as described, but it is also useful at any other time to prevent a return movement of the knees under pressure of the log. Its character allows its force to be varied at will, as can be plainly seen.
Having thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:
l. In a head-block for saw-mills, the com bined index, ratchet, and brake-wheel, in combination with suitable lever,index, and brake, as set forth.
2. In ahead-block for saw-mills, the wheel H, with rim `\N, ratchet-teeth N', and indexteeth N8, in combination with arm J and lever I, carrying` reversible pawl, substantially as and for the purpose set forth.
3. In a head-block for sawmills, the index, ratchet, and brake-wheel combined in one, in combination with alever, I, having reversible pawlI, an index, J, and a brake, T, to receive the rebound, all substantially as specified.
4. The combination of wheel H, leverI, provided with pawlI, brake T, index J, and arm Q, with notchesRR, substantially as specified.
5. In a head-block for saw-mills, the cam S, in combination with the wheel H and index J, secured to the frame A for the purpose set forth.`
6. In a head-block for saw-mills, the wheelV H, lever I, provided with a pawl, I', arm Q, and index J, the latter being made thin so as to act as a spring, and having a rib, o, for engaging with the teeth of the wheel and with notches ofthe arm Qfall substantially as and for the purpose set forth.
7. In a head-block for saw-mills, the combination of wheel H, lever I in rear, reversible pawl I', index J in front, shaft T, arm Q, cam S, brake T beneath the wheel, lever U, pawl V, scale-bar X, provided with stop Y, all supported by the frame A, andthe shaft F, engaging with the main shaft B, all substantially as and for the purpose set forth.
DARIS PARKH URST.
Witnesses:
GEO. H. KNIGHT, CHARLES PrcxLEs.
roo
IIO
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