US2554678A

US2554678A - Machine for sawing stone

Info

Publication number: US2554678A
Application number: US105417A
Authority: US
Inventors: Minkler Everett; Floyd E Minkler
Original assignee: Individual
Current assignee: Individual
Priority date: 1949-07-18
Filing date: 1949-07-18
Publication date: 1951-05-29
Anticipated expiration: 1968-05-29

Description

May 29, 1951 E. MINKLER ET AL MACHINE FOR SAWING STONE Filed July 18, 1949 s Shets-$heet 1 ATTORNEX May 29, 1951 E. MINKLER ET AL MACHINE FOR SAWING STONE 3 Sheet s IN V EZN T EZ/e fi M 7; By U A R/VE):

E. MINKLER ET AL MACHINE FOR SAWING STONE 3 Sheet-Sheet 3 Filed July 18, 1949 INVEN TOR: .EversiZMirgkZen BY Floflcl ECMLnkZeY; flzam/ am A TTO R/VEY- Patented May 29 1951 UNITED STATES? PATENT OFFICE MACHINE FOR SAWING- S'IIONE Ever Minkl r Pasa na, and El y! Mink cr, Los. An l s, Ca it.

Application July 18, 1949, Serial No. 105,4 1

(CL. l2 5..s17)

laims. 1

This. invention relates to. machines for sawin stone, such as marble and the like, and it, is an improvement: on our apparatus for sawing: stone disclosed in our United States Letters Patentv No. 2,411,585, issued November 2.6., 19%..

The general object of the invention is. to pro.- vide an improved machine; for sawing stone, and particularly marblel which will. saw stone faster than is possible with other stone-sawing m chines.

Other objects. and advantages will appear hereinafter as thisv specification progresses.

The invention is: illustrated in the annexed drawing, which forms a part of this specification,

and in which:

Fig. 1 is a side elevation of our invention;

Fig. 2 is a plan, view of our invention;

Fig. 3. is. a transverse vertical section of our invention taken on line 3-.-.3 of Fig. 1;-

Fig. 4' is a fragmentary side elevation, on an enlarged scale, of certain features of construction of our invention;

Fig. 5 is a fragmentary side, elevation of the saw of our invention on an enlarged scale;

Figs. 6, 7 and 8 are side views of the machine saw, showing the saw in different sawing posi-. tions;

Fig. 9 is a horizontal section taken on line 9-9 of Fig. 1 showing certain details of con struction,

Referring more particularly to the drawings, in which the same parts are designated by the same reference numerals in all ofthe views, I designates a supporting frame upon which the operating parts of our invention are supported, which frame comprises a pair of spaced parallel hori-- zontal base beams 2, and a pair of spaced end upright frame members 3 which rest upon and are bolted to said horizontal base beams 2 by bolts t. On the inner sides of said upright frame members are secured vertical plates 5 which are formed at their inner sides with vertical dovetail tongues 6.

A horizontal vertically slidable saw-carriage 1 comprises a pair of spaced parallel horizontal side I-beams 8 and a pair of transverse end blocks 9, which connect the corresponding ends, respectively, of said side beams, and said end blocks are provided in their outer sides with dovetail grooves H] which slidably receive the dovetail tongues 6 on the upright plates 5, whereby the saw carriage frame upright members 3 to slide vertically up or down on said frame members.

A pair of vertical screw rods H are located at the inner sides of the vertical plates 5 secured z. to the inner sides of the upright frame members 3, which screw rods are journaled at their lower ends in bearings l2 formed on the lower ends of the tongues 6- on said plates 5, while the upper ends of said screw rods II are journaled in bearings IS in horizontal plates [4 and extend upwardly through said plates, which are secured on the upper ends of said upright frame members 3 and extend inwardly beyond the upper side of said frame. members, in which extending portions of said plates I4 are located said bearings l3. Thescrewrods l I extend through vertical threaded bores l5 in the end blocks 9 of the saw carriage l, the threads of which screw rods engage the threads of said threaded bores, whereby said saw carrier is moved up or down as said screw rods are rotated in one direction or the other, in the manner hereinafter more fully described. The bores i5 are formed partlyin the slide blocks 9 proper and partly in vertical bosses 9' formed on said blocks in the dovetail grooves ll] of said blocks, and the dovetail tongues 6 of the plates 5, are provided with vertical arcuate grooves 6 which receive said bosses and permit vertical movement of the bosses therein as the carriage I is raised .or lowered. Beveled pinions I6 are secured on the upper ends of the screw rods H, with the hubs I! of said pinions turnably resting upon the plates l 4 and supporting said screw rods at their upper ends against downward displacement. Said beveled pinions I6 mesh with beveled pinions l8 secured on the ends, respectively, of a horizontal shaft l9 journaled in bearings 20 mounted on brackets 2| upstanding from'the horizontal plates M, which shaft l9 extends through and outwardly beyond the beveled pinion I8 at one end of the machine, and through another bearing 22 secured on the outer end of the plate M secured on the upper end of the upright frame member 3' at said end ofthe machine. A pulley 23 is secured on the outer end of said shaft is beyond the bearing 22', over which pulley may be extended a belt from a pulley of a feed mechanism (not shown), for raising or lowering the 'saw carriage I and parts mounted thereon,

through the medium of said shaft l9, beveled pinions l8 and I6 and screw rods ll, in the man.- ner and for the purpose hereinafter more fully described.

To the under side of the longitudinal horizontal side beams 8 of the saw carriage 1, near one end of said beams, are secured a pair of blocks 24, respectively, and to the under side of said blocks are secured a pair of bearings 25, respectively, in which bearings is journaled a crank shaft 26 extending transversely of said saw carriage under the side beams 8 thereof, on one end of which crank shaft is formed a crank 21, which comprises a radial crank bar 28, secured nearer one end than the other end thereof, on said end of said crank shaft, and a crank pin 29 secured at one end to the shorter arm 30 of said crank bar 28 and extending outwardly from said crank bar, as shown in Figs. 1, 2 and 3 of the drawings. A balance hand wheel 3| is secured on the end of the crank shaft 26 opposite the end on which the crank 21 is formed.

On the upper side of the saw carriage a plate 32 rests upon the upper side of the side beams 8 of said carrier and is secured to said side beams by bolts 33. A motor 34 is mounted on said plate 32, and belts 35 extend over a pulley 36 on the shaft 31 of said motor, and over a pulley 38 secured on the crank shaft 26, whereby said crank shaft is rotated by said motor.

To the under side of the longitudinal horizontal beams 8 of the saw carriage 1, near one end of said beams are secured a pair'of knuckles 39, respectively, by means of bolts 48 and nuts 4|, which bolts extend downwardly through the lower flanges 42 of said I-beams 8 and through base flanges 43 of said knuckles, and said nuts being threaded on the lower ends of said bolts and tightened against said knuckle flanges 43 for holding said knuckle flanges against said I-beam base flanges 42 as clearly shown in Fig. 4 of the drawings. A pivot rod 44 extends transversely under the saw carriage 1, with the ends of said rod extending through and secured in said knuckles 39, as shown in Figs. 3 and 4 of the drawings. A hinge knuckle 45 is fitted between the knuckles 39, and through said hinge knuckles extends the pivot rod 44, on which rod said hinge knuckle may turn. Said hinge knuckle 45 is formed at its lower side with a depending longitudinal web 46 and with a pair of spaced transverse bracing webs 41 extend ing from each side of said longitudinal web, on the lower ends of which webs is formed a horizontal supporting plate 48, for supporting a pair of crank bearings 49 and a, transmission shaft bearing 50. The crank bearings 49 are each formed with a pair of base flanges 49' at the upper and opposite sides thereof, which flanges are secured to the lower side of the plate 48 by bolts 5| and nuts 52, whereby said crank bearings are detachably secured to said plate, and in said crank bearings 49 are J'ournaled the end portions of a crank shaft 53 which extends transversely under and across the saw carriage on the same level as the crank shaft 26. On one end of said crank shaft 53 is formed a crank 54, which comprises a radial crank bar 55, se-' cured nearer one end thereof than the other on said end of said crank shaft, and a crank pin 56 secured at one end and to the shorter arm 51 of said crank bar and extending outwardly from said crank bar as shown in Figs. 1, 2 and 3 of the drawings. A balance hand wheel 58 is secured on the end of the crank shaft 53 opposite the end thereof on which the crank 54 is formed. The transmission shaft bearing is formed on the lower end of a bracket 59 depending from the supporting plate 48, which bracket is formed with a horizontal base flange 68 which is detachably secured to theunder side of said supporting plate by bolts GI and nuts 62.

The crank shaft 53 is rotated from the crank shaft 26 through the medium of a beveled pin ion 63, a beveled gear 64 in mesh with said beveled pinion, a transmission shaft 65, a universal joint 66, a slip joint 61, a beveled gear 68, and a bevel pinion 69. The transmission shaft 65 is formed in three sections 10, H and 12. The section 10 of the transmission shaft 65 is journaled in a bearing 18' near the end of said section on which the beveled gear 64 is secured, said bearing 10 being secured to a cross bar 8' secured to the under side of the longitudinal side beams 8 of the saw carriage I. The section 12 of the transmission shaft 65 is journaled in the bearing 50. The beveled pinion 63 is secured on the crank shaft 26 and the beveled gear 64 is secured on the near end of the transmission shaft section 16. The universal joint 66 includes two members 13 and 14, which are universally connected together as at 66 and secured on the adjoining ends respectively of the transmission shaft sections 10 and H. The slip joint 61 comprises a male member 15 and a female member 16 on the adjoinin ends of the transmission shaft sections H and 12, respectively, said male member comprising a plurality of longitudinal splines 11, and said female member being in the form of a socket provided with a plurality of longitudinal grooves 18 in the inner side of its longitudinal socket Wall, into which grooves the splines 11 of said male member slidably fit. 0n the end of the transmission shaft section 12, opposite the end on which the female member 16 of the slip joint 61 is secured, is secured the beveled gear 68 in mesh with the beveled pinion 69 which is secured on the crank shaft 53.

A reciprocative and oscillative stone-cutting saw is pivotally suspended at its ends, respectively, on the

cranks

21 and 54,. which saw comprises a saw frame BI and one or more stonecutting saw blades 82 secured at their ends in said saw frame. The saw frame 8| comprises a pair of slightly spaced longitudinal

tubular struts

83 and 84, and a pair of flat-sided

transverse end members

85 and 86, which are secured, respectively, at their inner sides and at their inner end portions to the opposite ends of said

struts

83 and 84. Said

end members

85 and 86 are provided with

slots

81 and 88, respectively, extending. transversely therethrough, through which slots extend

keys

89 and 9|), respectively, for holding, and adjusting the tension of the saw blades 82 in the saw frame 8|. The keys 89 are formed with heads 9| on their outer ends, for engaging the outer side of the frame end member 85, and pins 92 are secured in the inner ends of said keys extending from one side thereof through apertures 93 in the adjacent ends of the saw blades 82, respectively. In the inner ends of the keys 98 are secured pins 94 projecting from one side of said keys through apertures 95 in the adjacent ends of the saw blades 82, and the outer ends of said keys 96 are provided with vertical slots 96 extending therethrough, through which slots are driven wedges 91, which engage the outer ends of said slots and the outer side of the end frame member 86, whereby said keys 96 are drawn outwardly in the end frame member 96, and the pins 94, engaging the apertures 95 in the adjacent ends of the saw blades 82, draw said blades taut. to the desired tension between said pins 94 and the pins 92 in the inner ends of the keys 89 engaging the apertures 93 in the adjacent end of the saw blades 82 and drawing the heads 9| of said keys 89 against the outer side of the end frame member 85. The saw blades 82 are held near their ends, respectively, in suitable spaced relation, according to the desired thickness of the slabs of stone to be cut by said blades, and the ends of the blades are held in position against displacement on the key pins "92 and 94 by spacing blocks '98 and 99 and set screws I and i0! threaded in and extending through lugs I02 and I03 projecting laterally from the outer ends of the

end members

85 and 86, respectively, of the saw frame til, the ends of said set screws engaging the spacing blocks 98 and 99 at the outer side of the outermost saw blade 82,, with Said remaining spacing blocks placed between said saw blades except one of each of said blocks placed between the innermost blade 82 and the saw frame strut 34 in alignment with "said set screw, so that said spacing biocks may be tightened against said blades by said set screws for effectively holding said saw blades in their properly spaced relationship. A pair of spaced bearings I34 are bolted to the upper side of the end frame member 85 of the saw frame 8|, through which the pin 29 of crank 2'! extends and in which said crank pin is journaled, whereby one end of the saw 80 is swingably suspended on said crank pin 29. A pair of spaced bearings I05 are bolted to the upper side of the end frame 86 of the saw frame 8|, through which the pin 56 of crank 54 extends and in which said crank pin is journaled, whereby the other end of the saw 80 is swingably suspended on said crank pin 56.

A track I05 extends across and is secured to the upper side of the base beams 2 of the frame I, upon which track the wheels I01 of a flat car I08 travel, so that a block of stone I10 such as marble, may be transported on said car and brought and supported by said car under the saw 80 to enable said saw to saw said block of stone in the manner hereinafter more fully described.

The operation of our invention is as follows:

The saw carriage I and saw 80 being raised to a suitable elevation by the saw carriage feed mechanism, through the medium of the pulley 23, shaft I9, beveled pinions I8 and I6, screwshafts II and threaded openings I5, through which said screw rods extend in threaded engagement therewith, and a block of stone, such as marble H0, being placed upon the flat car I08 and said car rolled along the track I06 to a position where said block of stone rests directly under said saw 80, the motor 34 is started, whereupon the crank shaft 26 and crank 21 are rotated clockwise, as illustrated in Fig. 1 of the drawings, through the medium of the motor shaft 31 and pulleys 35, and the belts 35 extending over said motor pulley and the pulleys 38 secured on said crank shaft 25, while the crank shaft 53 and crank 54 are rotated counterclockwise, from the crank shaft 26, through the inedium of beveled pinion 63, beveled gear 64, transmission shaft 65, universal joint 56;" slip joint 61, beveled gear 58 and beveled pinion 69, and the saw 80 is reciprocated and oscillated by said cranks 21 and 54, as illustrated in Figs. 6, 7 and 8 of the drawings, which movement of said saw causes the saw blades to cut the block of stone I In on an are indicated I I2 in Figs. 6, 7 and 8 of the drawings. During the reciprocating and oscillating movements of the saw 80 in cutting the stone on an arc, as aforesaid, the saw blades 82 assume different positions, i. e., from an inclined position, extending downwardly from a point coinciding with the center of the crank shaft 53 to a point directly below the crank shaft 26, as shown in Fig. 6, to a horizontal position slightly below said crank shafts, as shown in Fig. "7, and from said horizontal position to an inclined position extending'in the opposite direction from that shown in Fig. 6, from a point coinciding with the center of the crank shaft 26 to a point directly below the crank shaft 53, as shown in Fig. 8 of the drawings. The movements of the saw '80 from one position to another, as "illustrated in Figs. 6, '7 and 8, causes the distance between the crank shafts '26 and 53; the length of the transmission shaft 65; and the relative positions of the transmission shaft sections 10 and TI to vary, which variations are provided for by the pivoted crank shaft bearing 49 on the pivot rod 44, by the slip joint 61, and by the universal joint 66, said bearing and said slip joint providing, respectively, for the variation in distance between said crank shafts and the variation in the length of said transmission shaft, and said universal joint providing for the relative variation of the position of the axes of the transmission shaft sections I0 and I I. Water is fed to the saw blades 82, in any suitable manner, to prevent said blades from overheating, and to wash out of the cuts, made in the stone by the saw blades, the saw cuttings of the stone and the mud formed by the stone saw dust and said water, during the operation of the saw 80. Applicants saw, in cutting the stone on an arc, contacts and cuts the stone at one point, only, at any time, with all of the pressure of the saw applied to said point during the cutting operation of the saw, as illustrated in Figs. 6 to 8 inclusive. As the saw cuts the stone, the saw blades 82 are moved downwardly to maintain the cutting edges of said blades in sawing contact with the stone, by means of the feed mechanism (not shown) through the medium of the pulley 23, shaft I9, beveled gears I8 and beveled pinions I6, screw rods II and threaded openings I5 in the end blocks 9 of the saw carriage "I, the threads of which openings are engaged by the threads of said screw rods.

In the use of our stone sawing machine any suitable stone saw blade may be used, such as a plain edge toothless blade, an ordinary toothed blade, or a diamond-tooth blade.

We do not limit our invention to the exact construction and arrangement disclosed herein, since various changes therein may be made without departing from the spirit of the invention.

We claim:

1. A stone-sawing machine including a pair of crank shafts, fixed bearings, in which one of said crank shafts is journaled, floating bearings in which said other crank shaft is journaled to permit said latter crank shaft to be moved toward or away from said first crank shaft, during rotation of said crank shafts in opposite directions, means for rotating said crank shafts as aforesaid, cranks on said crank shafts, respectively, a saw pivotally mounted at its ends on said cranks, respectively.

2. A stone-sawing machine as claimed in claim 1 in which the means for rotating the crank shafts includes means for rotating said crank shaft journaled in said fixed bearings, a transmission shaft formed in three sections, means whereby one of the end sections of said transmission shaft is rotated at its outer end by said crank shaft journaled in said fixed bearings, means whereby said crank shaft journaled in said floating bearings is rotated by the outer end of the other end section of said transmission shaft, a universal joint connecting the inner end of said first named end section of said trans- 7. mission shaft to the adjacent end of the intermediate section of said transmission shaft, and a slip joint connecting the inner end of said last named end section of said transmission shaft to the adjacent end of said intermediate section of said transmission shaft.

3. A stone-sawing machine including a pair of crank shafts, fixed bearings, in which one of said crank shafts is journaled, floating bearings in which said other crank shaft is journaled to permit said latter crank shaft to be moved toward or away from said first crank shaft, during rotation of said crank shafts in opposite directions, means for rotating said crank shafts as aforesaid, cranks on said crank shafts, respectively, a saw pivotally mounted at its ends on said cranks, respectively, said means for rotating said crank shafts in opposite directions comprising means for rotating in one direction, said REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 333,510 Frenier Jan. 5, 1886 432,183 Frenier July 15, 1890 2,135,047 Carpenter Nov. 1, 1938 2,411,585 Minkler et al Nov. 26, 1946