US2666461A - Heel block sawing machine - Google Patents

Description

Jan. 19, 1954 c. A. Jo'HNsoN HEEL BLOCK SAWING MACHINE Filed Jan. 5, 1949 5 Sheets-Sheet l l [n ven for CharlesJo/znson E c. A. JoHNsoN HEEL BLOCK SAWING MACHINE 5 Sheets-Sheet 2 `llan. 19, 1954 Filed Jan. 3, 1949 nvenap Char/ efSJo/mson By Jam.A 19, 1954 c. A. JoHNsoN 2,655,461

HEEL BLOCK sAwING MACHINE Filed Jan. 3, 1949 5 Sheets-Sheet 3 Jan. 19, 1954 c. A. JOHNSON HEEL BLOCK SAWING MACHINE 5 Sheets-Sheet 4 Filed Jan. 5, 1949 /n uen tof i Char/e5 A.Joh nson Jan. 19, 1954 c, A, JOHNSON 2,666,461

' H EEL BLOCK sAwING MACHINE Filed Jan. 5, 1949 V5 Sheets-Sheet 5 P912. /06 272 Igan n ms'nora Char/es AJo/m son By /2 ey Patented Jan. 19, 16954 HEEL BLOCK SAWING MACHINE Charles A. Johnson, Andover, Mass., assignor to United Shoe Machinery Corporation, Flemington, N. J., a corporation of NeW'Jersey Application January 3, 1949, Serial No. 68,841'

6 Claims.

This invention relates to machines for sawing wood heel blocks or blanks and is illustrated' as embodied in an improved machine of the type disclosed in Unit-ed States Letters Patent No. 1,888,272, granted November 22, 1932, on an application filed in the name of Ralph F. Knight.

The present invention consists in the novel features hereinafter described, reference being had to the accompanying drawings illustrating one embodiment of the invention selected for purposes of illustration, said invention being fully disclosed in the following description and claims.

In the drawings,

Figs. 1, 2 and 3 are front, side and plan views, partly broken away and partly in section, of the illustrative heel block sawing machine;

Fig. 3A is a section on line UIA-IIIA of Fig 3;

Fig. 4 is an angular View of a wood stick or heel' strip a-V portion of which has been sawed by the use of the above machine to form' wood heel blanks or blocks;

Fig. 5 is a perspective View of one ofthe wood heel blocks sawed from the stick illustrated in Fig. 4, a wood heel which is subsequently turned.

from-the block being shown in dotted lines;

Figs. 6 and 7 are plan views showing during two different stages of the heel block' sawing operation mechanism for supporting and positioning in the machine theV stick from which the wood heel blocks are sawed;

Fig. 7A is a section on line VILA-VHA ofFig. 6i;

Fig. y8 is a detail view showing a circular saw of the illustrative machine and a housing therefor;

Fig. 8A is a section on line VHIA-VIIIA of Fig. 2 showing in detail a mounting for the saw;

Figs. 9 and 10 are detail views showing in per'- spective stops which are mounted upon a stick carrier of the machine and are adaptedto position a stick engaging arm in different operative positions upon the carrier;

Fig. lil is a View on line XI-XI of Fig. 3 showing portions of mechanism for controlling a counter which records the number of wood heel mension Si! (Eig. e) of the stickl to form breast and rear. facesti?, 34` (Fig. 5) respectively ofthe blocks which are of the proper size and shape` l2 shows wiring for controlling saidV 2 to have heels turned from them with a minimum of wastage of wood.

The stick 26 to be sawed is rested against or backed by a holder or arm 36 which is pivoted upon apin 38 secured to a steel circular insert 46 (Figs. 3, 6 and 7) screwed to and forming part of a slidable stick supporting carrier i2 mounted for forward and rearward movement upon rollers 44, i6 (Figs. l, 2 and 3) rotatably mountedr on bearings supported by lugs 46, 5i! secured to a table 52 which will be hereinafter described in detail. The stick 26 which is substantially rectangular or rhomboidal in cross section is usually placed manually upon the carrier 42 with one of its faces 54 (Figs. 4 and 7A) resting against a face 56 (Figs. 6, 7 and 7A) of the arm 36 and one of its faces 58 resting against a iiat upper surface 66 of the carrier when said arm is in its full-line position shown in Figs. 3 and 7 in engagement with a front stop or abutment 62 (Figs. l, 2, 3 and 9) secured, as will be hereinafter explained, to an arcuate rib portion 64 (Figs. 3, 9 and 10) of the carrier 62, the leading untrimmed and somewhat irregularly shaped end 66 (Fig. fi) of the stick extending to the right, as viewed in Figs. 3 and 7, of-the general plane of a circular saw 66,

When the manually actuated carrier i2 is moved rearward, that is in a direction indicated by arrow 'I' (Figs. 3, 6 and 7), past a toothed cutting edge l2 of the saw 68, the stick 26 is sawed along the line 26 (Figs. 4 and 5) to form the breast face 32 (Fig. 5) of the heel block 22. The carrier e2'l is next moved forward to its starting position on the table 52, a depending abutment or stop 'Hi (Figs. 2 and 3) of the carrier at such time being in close proximity to, or in engagement with, the rear roller 66 of the table 52 which roller may be referred to as a stop. The carrier arm 36 is then swung clockwise as viewed from above with relation to the carrier i2 to its dash-line position (Fig. 3) or to its full-line position (Fig. 6) against a rear stop or abutment i6 (Figs. 3 and l0) secured by means which will be hereinafter described to the arcuate rib 6@ of the carrier, the leading end of the stick 26, as best shown in Fig. 6, thereafter being forced against a gage 18 (Figs. l, 3, 6 and 7) adjustably secured to a bracket 86 secured to a projection of the table 52. After clamping the stick 26 thus positioned against the carrier 42 and its arm 36 by the use of a holddown clamp 82 (Figs. 2 and 3) fulcrumed upon a pin 84 mounted upon the carrier 42, thecarrer is again moved rearward on the rollers 44, i6 to move the stick 26 past the toothed cutting edge 'i2 of the saw 6B with the result that 3 the stick 2) is severed along the line 28 (Figs. 4 and 5) to forni the rear face 3c of the blank 22. The carrier d2 is then again moved forward to its starting position upon the table 52 and the carrier arrn tt is swung forward to its full-line position (Figs, 3 and '.7) upon the carrier l2 against the front stop or abutment 62. After the right end (Fig. 7) of the stick 25 has been forced against a gage E3 (Figs. 3, 5 and 7) adju-stably secured to the bracket Sii and the stick has been clamped against the arm 3S and its carrier 42, the carrier 42 is again manually moved rearward to cause the stick to be severed along the line 2'5 (Figs. 4 and 5). The stick 29 is thereafter trimmed alternately along the lines it, 2S until it is used up, waste material at the trailing end of the stick being disposed of manually by the operator.

The machine comprises a main frame ii (Figs. l, 2 and 3) which is secured to the floor and upon which the saw and its operating means are supported. Sect' 'ed by screws 92 (Fig. 1) to the main frame at one side of the saw 68 is a trough Qi l 3) for receiving the blocks 22 out from the stick 213 for guiding them into a position over a container or collector Se (Fig. l) into which they are dropped. As will be ex plained later, pieces ci waste material trimmed from the sticks 2t drop into a trough SS (Figs. l and 3) and then into a container or collector lui? (Fig. l). access to said trough t being effected by raising, in response to depression of a treadle m2, a plate or lid 94 which normally forms the upper end portion of the bottom of the trough Sil. The lid its when in its closed position prevents access of material cut from the stick iii to the trough $3 and when in its open or active position prevents access of said material to the trough B and permits such material to drop into the trough 98.

In order to keep a record of' the number of blocks 22 sawed by the machine a counter it (Figs. 1, 2 and l2), which is operative in response to rearward incveinent of the carrier 42 and is hereinafter described, is secured to the main frame Si). and accordingly the lid fc4 is raised, a switch itt (Figs. i, 3 and 12.-) in a counter circuit Ht (Fig. i2) is opened to render the counter EES ineffective in response to rearward movement of the carrie-r di, therebi7 insuring against including` in the count waste pieces sawed from the stick 2S.

Power driving the saw @':S is provided by an electric motor H2 (Figs. i, 2 and 3) having secured to it slotted angle plates ilfi to which are adjustably secured levers 12u pivoted upon a bearing rod 22. Threaded into opposite end portions of the beig rod 22 are screws 23 which are mounted io; rotation in a bracket 24 bolted to the main frame Mounted in bearings (Figs. 1 and 3) secured to the main frame su is a shaft i (Figs. 13, 8 and 8A) having a partially threaded shank 32 onto which a collar 33 (Figs. 3 and 8A.) is shrunk. The saw 68 is clamped against the collar 33 by a nut E30 threaded onto said shank l32, the collar and the nut being recessed to provide an annular space for receiving a ring 29 (Fig. 8A) 'which is supported by the shank l32 and upon which the saw is mounted. A double pulley i3d (Figs. 1, and 3) is secured to the right end of the shaft iZS, as viewed from the front of the machine, and is driven through belts 38 by a double pulley 138 (Figs 2 and 3) secured to a drive shaft 49 (Fig. l

3) of the motor i i2. The weight of the motor i i2 and its angle plates H4 is partially supported by iiihen the treadle it? is depressed,

4 the belts 13S, thereby insuring that the belts are at all times in taut driving relation with the pulleys 34, 38.

In order to protect the operator from injury there is provided a saw hood or guard M2 (Figs. 1, 2, 3 and 8) which is hinged at its rear end upon a pin Mei carried by a sawdust collector or housing is@ secured by screws it!! (Fig. l) to the main frame Sil. Entering the rear end of the housing |45 is a pipe I5@ which is connected to a suction pipe (not shown), and through which sawdust in the housing is sucked for disposal.

In order to facilitate changing the saw 38 the housing ii has a saw-receiving chamber 52 (Fig. 8), a wall 153 or" which extends downward and a'way from an opposite vertically disposed wall i555 which is arranged adjacent to the threaded shank 32 and has a removable upper end portion i5?. After swinging the hood 55,2 back into engagement with a ledge les of the housing Mii and removing the nut i3@ and upper end portion ll of the wall E55, the saw may be moved to the left (Fig. 5) off the ring and swung toward the wall i523 of the housing sufficiently to enable the saw to moved from the end of the threaded shank 32 and slid upward past the end of said shank out oi the inachine. In installing a saw (58 in the machine said saw is siid past the outer end of the threaded shank 32 into the chamber i52 along the wall 53 and is then swung to a position at right angles to the axis of rotation of the shaft 28 and slid onto the ring ii. The nut E32 is then threaded onto the shank 32 to clamp the saw et in its operative position against the collar it and the upper end portion i5? of the wall 55 and the hood M2 are then arranged in their operating position shown in Fig. 8.

The arcuate rib M of the carrier 42 has formed in it a plurality of holes itt (Figs. 3, 9 and l0) for selectively receiving bolts i553 (Figs. 3 and 9) it@ (Figs. 3 and l0) or" front and rear stop units 62 (Fig. 9), i615 (Fig. 10) which comprise the stops or abutments 62, l5, respectively. The :front stop unit it@ comprises the bolt E53 which extends downward through an elongated slot i 'iii in the abutment and through a recess it in a block It@ and through one of the holes E56, the assembly being held in position on the carrier by a nut HZ threaded onto the bolt E58. Opposing faces of the abutment 62 and the block |68 are serrated.

The rear stop unit ili (Fig. 10) comprises the bolt 56d which passes downward through one of the holes A53, through a bore 86 in a block W2 and an elongatedslot IM in a plate it having formed integral with it the abutment 7S which its in an arcuate slot lili (Figs. 3 and 3A) of the carrier i2 and is arranged below the upper surface 60 of the carrier In order to engage the abutment IS which is positioned belowv the upper surface Sil of the carrier Iii, the carrier arm 36 has a depending portion i3? (Fig. 3A) which rides in the slot lili. The blocks |53, are provided with pins V53 (Figs. 3 and 9), H (Figs. 3 and l0) which when the front rear stop units it, E613 are assembled on the carrier cl2 engage an edge of the arcuate slot ils. Opposing surfaces of the block 682 and the plate |36 are serrated, the unit its. being clamped in its selected position to the carrier by a nut ist.

At the side of the arcuate ribbed portion 5d opposite the arcuate slot H4 is a wide noncontinuous arcuate slot 41S (Fig. 3) which, together with the slot I'M, facilitates access to the parts monomer;

for the purpose' off adjustmentforv the f frontendrear stopy units itt-,f ist' into differenti clampedpositio'nsupon the 'carrier 42; Inl ordertowassist the Operator t follow' blockthankingA instructions, the carrier' arm 3B" is provided! with: ai

pointer i921- (Figs.v Zand 3f) which may befmoved.'I

into register with any one'of aupluralityof giraduation's upon an arcuate scale f le# (Fig. 3)

When the'carrier 112i is inA its forward or restfposition shown in Figs. 1, 2f and 3i with`=its1def pendingl abutment 'It in 'engagement' with or close proximity to.- the rear' roller IHv` and. the' carrier arm B is in its-forward? position-upon# the carrier and in engagement with the 'abutment 625, the right end (Fig. '7)1 o'f the stick 2-il1 is moved into engagementlwith the gage S-pre paratory to forcing the clamp 82 'agaii-Ist the stick and movingA thel carriery42 rearward 'past the toothed" cutting edge 'i2 of the-saw 681th trimv said stick along line 2B.- When the` carrier 4'2is'` in its forward, or rest position, and thecarrier arm 36 is in its rearwardv positionr shown inV`A 6 against the abutment T6 preparatory'fto saw-`` ing the stick 2li along the line 28, the right end of the stick is in engagement with Vthe gagel. The gagesy 78 and iit in' rectil'inear'grooves- |96,

|93 formed in the bracket Sli-whichvis secured by screws 202 (Fig. l) tothe table 521 Screws 2cd, 206` whichY extend'- throu'gh elongated slots` 2%, 2 IG in the gagesli,4 SBanda-re 'threadedintok the bracket Se are utilized to secure'the gagesV in different adjusted positions in the grooves 19E, It. The gages 18, 8`3`=may be described-4 as being constructed and arranged to locate the stick 20 lengthwise upo'nthe carrier 42.

The holddown clamp S2, which 'comprises a toothed Work-engaging portion 2I'2 (Fig. 2) secured to an arm 214n (Figs. 1., 2 and 3') is pivoted' upon the pin 84 secured to thek carrier 42, and is positioned just to the left vofthe plane of theeircular saw 53 as viewed from the front of the machine. The forward end of the arm 2H' has' a handle 2 Ifwhich is normally heldin its raised position shown best in Fig. 2 by a spring 21 'and which is gripped and. moved clockwise bythe right hand of the operator to force thef'clamp 82 against the stick 2t) The operator retains his hold on the handle 216v to move the carrierwA in which the stick 2D' has been` positioned and' clamped, rear-ward to cut oli the heel block. The

operator usually grasps the-stick 2l*with left' hand just tothe left of the toothed work-engaging portion 212 of thev clamp-8f as' viewed: 'from' the front of the machineand in order to insure that the operators thumb cannot be moved against the saw 68- during rearward:` movement of the Icarrier 42, said carrier has secured toit an opstanding shield or plate' 2-2-0'; The plate`2'2'llf is secured to the carrier 42' just fforward'ofth'e axis of pivotal movement of the arm 38' upon said carrier and is disposed' in parallel relation to the plane of the saw 6B.

The bottom of the carrierV l2y is provided with depending flangesv 222 (Figs. 1 and having'. formed in them rectilinear grooves 2`2E5which ex"- tend parallel to the plane of 'the saw 6'8" andare" constructed and arranged to receive the rollers l which are carried by the 'table52` andare rotatable about axes parallel to the axis or" rotation of the saw. The rollers -lill carried by the table 52 are engaged by'lat steelplates 219i (Figs.A l, 2 vand 3) and 2H secured Vto Vandv forming part of the carrier 42. In order to assist in controlling the carrier 42 a bracket`22'3 is screwed.V4 to the table 52 and has at its upper end an' over- 751 hanging; lip the bottom or which is engagedl by' a flange 225 (Fig. 1'.) formed integral with the'v Thetab'le 52 which may be referred:

plate 222|. to asasu'pp'ort is rmounted upon rollers 226- (Figs: 1 and 2)', 228*A (Fig. 1) which are rotatably mountedupon bearing lugs 230, 232." bolted to the main.

trama Sill.'v The rollers 225. have cylindrical peripheries which engage flat plates 229 (Figs. 1. and 2) secured to the table and the rollers 228 (Fig. lha-ve' V-shaped' peripheries which run in notches 234i formed in plates 239 bolted to the table, said notches being disposed at rightanglesv (Figs. 2"an'd`3) ofA the carrier engages-the rear' rollert; Rearward movement of the carrier li-islimited by the engagement of adepending abutment! or stop 23B of the carrier with the front? roller 46. During a plurality of stick sawing cycles of the machine the carrier 42' is seldom moved 'forward or rearward suiiciently to cause the abutments iii, 23H' to engage the rear and* fronti rollers lit; said abutments serving merelyvas limit stops for the carrier.

The sticks or heel strips 2t are usually rectangulary in cross section but because of warping are` sometimes rhombciidal in cross section as illustratedy in dash and in dash-and-dot lines (Fig. 7A).- being straight is sometimes twisted. In order that sticks 2c" such as above referred to may be effectively clamped'to the fiat surface (i8 of the carrier i2 and to the arm et which may be considlered` as partI of? the' carrier, it isy desirable that substantially the entire face 58' of the stick shall engage the surface Bil' of the carrier and that tti-'e tace Eofthe stick shall engage the face Eli of the. ari-natl a considerable distance from sa-id4 surface 610. In order to accommodate sticks which' have different cross sections and/or are slightly twisted the stick engaging face 5t of the arm 36'-, instead of being hat and-disposed at a-ri'ght angle to the stick supporting surfaceV '6c of the carrier arm 3E, has a salient portion 23'3 which is spaced a considerable distance, equal approximately to one-half of the thickness 2'2"?- (lig.` 4e) ofi an average stick 2d operated upon, frcmthe' surface Sii and is substantially parallel to said-surface. The face 56? may be described' as being undercut.

In order to operate the machine at its maximumcapacit'yit is desirable, in forming blocks 22."from which heels 2li of different styles and/or sizes are to be turned, to vary the starting positions of 'the carrier A12 in accordance with the size or` diameter of the saw 68 and a heightwise dimension '2'35tlv (Fig. 4) of the stick 2t, said starting positions being such that the sticks 2li can be' `quickly and eiiec'tively presented to thek saw 'with a minimum of lost motion. Accordingly, tlietable -liswhich carries the gages i8, te andthe stop 55, may be secured in different forward and' l rearwardfpesitions upon the rollers 226i, 22% to' provide a minimum gap 23? (Fig. 7) between the saw t8 and the right-hand end ofthe stick' engaging face E9 of the arm 36'. In setting up the machine for-"a saw 'G3 cia given diameter anda stickv 2160i ag-iven size, the operator adjusts' the table 52* and; accordingly, the gages i8, ili'and the stop 4E', longitudinally to' 'the .proper `position with'relation to the saw Esto provide the mini- Moreover, the stick 2t instead ofv mum gap 23?. The stop iii at that time is so positioned that when the carrier 42 has been moved forward from its position shown in Fig. 7 to its position shown in Fig. 6 the abutment 'ill of the carrier is in engagement with the stop. By moving the table 52 and, accordingly, the gages and the stop :i6 into different adjusted positions parallel to the plane of rotation of the cutting edges of the saw 28, a desired maximum gap this (Fig. 6), which is determined by the engagement of the abutment 'i4 of the carrier i2 with the stop, is maintained between the saw and the pivoted end of the arm 36 at its loading position shown in Fig. 6 and a gap of a constant width is maintained between the saw and the gage S2.

Secured to the bottom of the table 52 by screws 23E (Figs. l and 2) is a depending bracket 258 having a vertical slot 2t@ (Fig. 2) in which engages a roll Zii carried by the upper end of an arm 242 pinned to the central portion of a shaft 2M rotatable in bearings of the main frame. Keyed to the shaft at its left end as viewed from the front of the machine, is an arm 2116 having secured to it a laterally extending pin 22S arranged in an arcuate slot 255] (Fig. 2) in the main frame iid. Also extending from the arm 2% is a screw 252 which extends through an arcuate slot 255i in the main frame Sii and has threaded onto it a hand nut 2555 which may be clamped against the main frame to hold said arm in position, cr which may be temporarily released to swing the arm and accordingly move the table 52 into the desired forward or rearward position. after which the nut 25@ is again turned onto the screw to bind the arm in its adjusted position to the main trame.

In order to operate, except as hereinafter explained, the counter idc every time that the carrier is moved rearward to saw the stick 2i) along lines or 22, the carrier 22 has secured to it a cam 25d (Fig. 1l). During rearward movement of the carrier E2 the cam 258 engages a roll 266 rotatably mounted upon an arm 252 which is pivoted upon a pin 25d mounted upon a bracket 2% secured to a switch housing 268 screwed to the table 52. Slidingly mounted in a bore 21E) of the housing is a plunger 2?'2 (Figs. ll and i2) having bridging bar normally held by a spring 23d in a raised position away from terminals in the circuit lill. The arm 2ti2 carries a yieldable lug 238 just beneath which is positioned the plunger 22, the construction and arrangement being such that each time the arm 262 is depressed it forces the bridging bar of the plunger N2 into engage-ment with the terminals 2l@ and closes the circuit Iii?, thereby actuating the counter which may be one of various commercial types, for example, one such as is disclosed in 'United States Letters Patent No. 2,354,763, granted August l, 1944, on an application iiled in the name of Philip E. Nokes.

In order that the operator may prevent the counter iii-ii from recording movement of the carrier l2 when waste material is being trimmed from the stick 2d the circuit i if! is provided with the above-mentioned switch it (Figs. l, 3 and 12) which is normally closed but is opened in response to depression of the treadle |02 and accordingly upward movement of the plate or lid Hifi. The treadle m2 is pivoted upon a pin 282 (Figs. l and 2) secured to the main frame Sii and is constantly urged upward by a spring 28|, said treadle being operativelyl connected through a link 282 (Fig. 1) to an arm 284 (Figs. 1 and 3) i?? secured to a fulcrum pin 286 which is rotatable in the main frame 9@ and to which is secured the plate or lid ili. Secured to the link 232 is a lug 288 (Fig.V 1) which, during depression of the treadle E02 and accordingly upward movement of the link 282, swings against a plunger of the switch |08 to open said switch and thus break the circuit H0. When the operator is sawing ma terial which is to be dropped into the waste container |00 (Fig. 1) and accordingly is not to be registered by the counter ld he depresses the treadle |02, with the result that the plate ice is lifted, permitting waste material trimmed from the stick 2li to drop down the trough 98 and into the container it, and also causing the switch |08 to be opened to break the circuit lit.

In order to expedite the stopping of the saw 68 after a stop button 289 (Fig. l) controlling the electric motor ||2 has been depressed, there is provided a lever 29@ which is pivoted upon the main frame and is normally held in a raised position by a spring 292 and may be manually forced against a friction drum 29A? secured to the shaft |28.

Having thus described my invention, what claim as new and desire to secure by Letters Patent of the United States is:

1. In a heel block sawing machine, a saw having a toothed cutting edge arranged in a plane, means for operating the saw, a carrier which is movable in a path arranged parallel to said plane and has a flat surface constructed and arranged to be engaged by one face of a stick, and an arm which is adjustably mounted upon the carrier and has a face constructed and arranged to be engaged by another face of the stick disposed at an angle to said one face to position the stick on said surface at a predetermined angle to the plane of the cutting edge of the saw, said face of the arm extending above said flat surface of the carrier and having a salient portion which is arranged generally parallel to said surface and is spaced a distance equal to approximately onehalf the thickness of an average stick from said surface.

2. In a heel block sawing machine, a circular saw having teeth rotatable in a plane, a frame, rollers mounted upon said frame, a table mount ed upon said rollers for initial adjustment in a predetermined path parallel to said plane, rollers mounted upon said table, a carrier reciprocable upon the rollers of the table in a predetermined path parallel to said plane, a pair of stops adjustably secured to the carrier, an arm pivotally mounted upon the carrier for movement over a surface of the carrier into two positions determined by the stops to locate a stick upon said surface in two angular positions with relation to said plane, a pair of gages which are adiustably secured to the table and are constructed and arranged to locate the stick lengthwise upon said surface of' the carrier and in engagement with the arm, a manually operated clamp constructed and arranged to hold the stick in its proper position upon the carrier, said carrier when moved in said second-named path being adapted to move the positioned and clamped stick past the saw to trim a heel block from said stick, and means for moving the table into different adjusted positions along the first-named path to vary a gap formed between the saw and the arm thereby facilitating presentation of sticks of different sizes to the machine and sticks of the same size to saws of different sizes used in said machine.

3. In a heel block sawing machine, a saw having a toothed cutting edge, a carrier constructed and arranged to position a stick, a clamp for securing a positioned stick to the carrier, said carrier being movable in a predetermined path past the cutting edge of the saw to cut heel blocks from the stick, a trough for guiding heel blocks successively cut from the stick to a collector, means comprising a member movable to an active position across the trough for permitting waste material trimmed from the stick to be guided to a second collector, counting mechanism which is actuated by the carrier during the block cutting movement, mechanism comprising a treadle which is operatively connected to said member and is constructed and arranged to cause said member to move to said active position when the treadle is depressed, and means operatively connected to the treadle for rendering said counting mechanism inactive upon depression of said treadle.

4. In a heel block sawing machine, a rotatable drive shaft which is mounted for rotation about an axis and has a shank, a portion of which is threaded, a collar secured to said shank, a ring positioned upon said shank, a circular saw which is positioned upon said ring and has a toothed cutting edge arranged in a plane disposed at right angles to the axis of rotation of the saw, a nut, said nut and collar being recessed to receive the ring, said nut being adapted to force the saw against said collar and to cooperate with the collar to secure the saw for rotation with the drive shaft, means for moving a stick arranged at a predetermined angle to the aXis of rotation of the saw in a path disposed at right angles to said axis to cut heel blocks from the stick, a housing for the saw, said housing comprising a dust collector one side of which is arranged adjacent to an end o? the threaded shank of the shaft and is partially removable and the other side of which diverges from the rst-named side as it extends away from said shaft, said housing also comprising a hood which is pivoted upon said dust collector, the construction and arrangement of said housing being such that the hood can be swung back upon the dust collector and that the saw, after the nut has been removed from the shank and the saw has been slid off the ring, can be swung toward the diverging side of the dust collector and moved olf said shank and then past the end of the shank out of the dust collector.

5. In a heel block sawing machine having a frame, a circular saw on the frame having teeth rotatable in a plane, a table supported for movement on the frame, a stop mounted upon the table, a pair of gages adjustably secured to the table, a carrier having a flat upper surface for supporting a stick and having an abutment movable into engagement with the stop for determining a forward limit of movement of the carrier, a pair of members adjustably secured to the carrier, an arm which is pivotally mounted upon the carrier and is movable over said surface of the carrier into two angularly adjusted positions respectively determined by the said members, said arm cooperating with said surface of the carrier and with said gages respectively to position said stick in two predetermined positions upon the carrier during successive operations of the machine, said carrier being movable upon the table in a path generally parallel to said plane to move the stick past the saw to cut during said successive operations of the machine blocks from the stick, and means for moving the table and accordingly said gages and said stop intoy different adjusted positions on the frame lengthwise of said path depending upon the diameter of the saw and/or the dimensions of the stick in order to maintain a substantially predetermined maximum gap, determined by the engagement of said abutment with said stop, between the saw and the arm and also to maintain a constant relation lengthwise of said path between the gages and said arm when the carrier is at the forward limit of its travel.

6. In a heel block sawing machine, a circular saw having teeth rotatable in a plane, a table, a pair of gages adjustably secured to and a pair of rollers which are mounted upon the table and one of which serves as a stop, a carrier having an abutment and having a hat upper surface for supporting a stick, a pair of members adjustably secured to the carrier, an arm which is pivotally mounted upon the carrier and is movable over said surface into two different angularly adjusted positions determined by said members and which during two successive operations of the machine cooperates with said flat surface of the carrier and with said gages respectively to position said stick in two different predetermined loading positions upon the carrier, a manually operated clamp which is mounted upon the carrier and is constructed to force the stick at its loading positions against the surface of the carrier and against said arm, a spring for constantly urging the clamp away from the carrier, said carrier being movable upon said rollers in paths parallel to said plane to move in two successive operations the stick past the saw to out blocks from stick, and means for initially moving the table and accordingly the gages and the rollers into diierent adjusted positions lengthwise of said path of movement of the carrier in order to maintain for saws of different diameters a desired maximum gap, which is determined by the engagement of the abutment of the carrier with said stop on the table, between the saw and said arm at one of its loading positions and to maintain for saws of different diameters the saine relation in said plane between said gap and said gages.

CHARLES A. JOHNSON.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 183,889 Blauvelt et al Oct. 31, 1876 694,260 Duncan Feb. 25, 1902 771,836 Schantz Oct. 11, 1904 1,213,560 Vertunni Jan. 23, 1917 1,482,631 De Linieres Feb. 5, 1924 1,566,191 Fleischel et al Dec. 15, 1925 1,784,028 Pollard Dec. 9, 1930 1,888,272 Knight Nov. 22, 1932 FOREIGN PATENTS Number Country Date 208,793 Switzerland June 1, 1940

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