US2512164A - Sawing machine for block trimming - Google Patents

Description

June 20; 1950 s; w. MANN SAWING momma FOR BLOCK mums 2 Sheets-Sheet 1 Filed Sept. 24, 1946 June 20, 1950 s. w. MANN SAWING momma FOR BLOCK mums 2 Sheets-Sheet 2 Filed Sept; 24, 1946 B) BEAT/i765 AMA A/ Patented June 20, 1950 sewai-a w. Mann, deceased, late of Pittsburgh,

Pa., by Beatrice A. Mann, administratrix, Pittsburgh, Pa.

, lApplication September 24, 1946, Serial No. 698,913

This invention relates toportablesawing machines; and more particularly to those that are suitable for resurfacing wooden blocks such as the cutting blocks that are used'bybutchers, leatherworkers, etc.', the working surfaces of such --1 Claim. -(cl. 144-2) blocks becoming unevenly worn or'partlycut away during use, and therefore requiring thatupper portions thereof be sawed away to provide another level working surface.

One object of the invention'is to provide in apparatus of the character referred to, various partsthat can readily be folded upon one another and other parts that can be easily removed, to facilitate transporting of the machine.

Another object of the invention is to provide a machineof the character referredyto having an electric motor for driving a saw, the motor being mounted in an improved manner, for counterbalancing parts of the mechanism with respect to a .supporting standard therefor and which can easily be adjusted to control the belt tension and which can conveniently be applied to and removed from the supporting framework;

1In 'theaccompanying drawings, Figure 1' shows the machine in side elevation; Fig.2 is a plan view thereof; Fig. 3 is a plan view ofthe motor-supporting" bracket of Fig. 1; Fig.4 is a face view thereof Fig. 5 is an edge viewthereof; Fig; 6 is a sectional plan view, on an enlarged scale, of a portion of the apparatus of Fig. 2, and Fig.7 is an enlarged sectional ,plan view of still another portion thereof.

The apparatus is here shown as used in sawing across the upper part of a butcher block, a portion of which is shown at 9, to give a level working surface to a worn block.

The apparatus com-prises a frame having legs to, II and 12. The upper ends of the legs 10 and II are connected to a tubular upright or post 13 by means of clips l4 and bolts I5. At their lower ends, these legs are connected to a headed stud l6 that is driven into the lower end of the tube [3, by means of bars I! that have their outer ends welded to the legs and whose inner ends are flattened and have holes through which the stud It extends.

The leg l2 also is connected to the stud l6, by a bar l8. A bar I9 is rigidly connected to the upper end of the leg I2 and is connected by a bolt 20 to a wing member 2| that is welded to the upright l3. A brace 22 extends from the stud to the upper portion of the leg 12. When the bolt 20 is removed, the bars l8, l9 and 22, together with the leg 12, may be swung as a unit on the stud IE, to fold the leg i2 and the bars against one u 2 of the legs l0-l l, to facilitate transport or stor ing-of the apparatus. Leveling screws 23 are provided for the legs.

Jointed arm members 25 and 26 are rotatably supported on the standard l3, they being pivotally' connected to one another at 24. The arm 25 has bearing sleeves or collars 21 and 28 formed thereon and loosely fitting around the upright l3 so as to be rotatable about the axis of the upright and also being adjustable vertically thereon. A bear-- ing collar 29 is clamped to the upright l3 and is held at vertically-adjusted positions thereon by a clamping bolt 30. This collar normally serves as a seat or vertical thrust bearing for the sleeve por- -ti0n 28 of'the swinging arm 25. A series of holes I 3! or other suitable marking is provided on the upright l3 to serve as a scale for guidance in adjusting the collar 29, and hence the swinging frame, to desired heights, in accordance with the The outer end of the swinging arm 26 h-asa bearing 33 formed thereon for the shaft 34 of a 1 saw 35 that is provided with a pulley 36. A shield 31 is connected to the arm 26 by bracket members 38 and 39, it being of somewhat larger diameter than the saw; so as to reduce danger ofaccident contact with the saw.

A shaft that extends through the joint at 24 has secured thereto pulleys 4| and 42, the pulley 4| having driving connection with the pulley 36 by a belt 43. A belt 44 extends from thepulley 42 to a motor pulley 45. A water receptacle 45 is mounted on the arm 25 and has a hose connection 41 with a pipe 48 that extends through the shield and discharges water to the saw, thereby wetting the saw dust and preventing it scattering and blowing around. A valve 49 is provided for controlling fiow of water through the pipe 48.

An electric motor 5| has a base 52 that is bolted to a bracket 53. The bracket has wings 54 that contain inclined notches 55 that are engageable with the end portions of a pin 56 that is supported in extensions 51 that project rearwardly from the lower portion of the arm 25. The motor can therefore be conveniently applied to and removed from the stand and can also be tiltably adjusted around the pin 56, as a pivot, as will be hereinafter explained.

The bracket 53 has an upstanding slotted arm 58 which is insertible upwardly into a yoke 59 that is carried by the upper portion of the arm 25. A screw 6| has threaded connection with the yoke 59 and has formed thereon a shoulder 82. The inner end of the screw has a reduced portion 63 that will extend into the slot in the upper end of the arm 58 when the parts are in assembled position.

When the framework proper is in assembled position somewhat as shown in Fig. 1, the motor 5| can be placed thereon by lifting ituntil the bracket arm. 58 projects upwardlythrough the yoke 59, whereupon inward and lowering movement of the motor will cause the bracket slots 55 i to engage the pin 56 and thereby support the motor on the frame. The screw 5| at this time will have been retracted far enough, relative tothe, yoke 59 to permit tilting of the, motor clockwise so that the belt 44 can conveniently be applied to its pulleys 42 and 45. Thereupon, the screw 6| will be turned to move it inwardly on the yoke,

' naled on the arm, a bracket carried by the sleeve in oppositely-extended relation to the said arm,

'andhaving tiltable movement thereon about a horizontal axis, adjacent to the lower end of sleeve, anarm carried by the bracket and projecting therefrom in a direction transverse to said horizontal, axis, a set screw having threaded engagement with an-upper portion of the sleeve with its reduced pointed end 63 entering theslot l in the arm 58 and its shoulder 52 bearing against the outer face of said arm. The motor 5| will thereby be-swung ina counterclockwise direction to give the required tension to thebelt 4 When the. parts are so assembled, the screw 6| will prevent accidental disengagement of the motor from the supporting pin 56. v

The motor circuit is controlled by a switch 6! that controls the circuit of wiring at 65 and 66. A terminal block 61 on the arm has a socket 68 to receive a plug from a house-lightingv circuit or the like, to supply current to the wiring f5 and 56 and the motor 5|.

A pin H1 is insertible through the bearing sleeve 21, when the swinging frame is fully raised on the upright I3. The arms 25-26,the motor 5| and their associated parts will thus be supported by the pin 10, on the upper end of the upright, while adjusting the. collar 29 tothe desired height. Removal of the pin ill will then let the frame drop into position to be supported by the collar29.

It will be seen that the saw frame can be moved into various positions with respect to the,

the arm 26 with thearm 25, the saw can bemoved over a wide area, without the necessity of shifting thesaw stand. Also, the arms 25 and 28 may be folded toward the plane of the legs I0 and",

and engageable with said arm to adjust the bracket about its horizontal axis, a motor mounted on the bracket in ,counterbalancingrelationto said armiandsaw', the motor shaft being verna cally disposed and having a pulley on its lower end, a driving connection between the pullevand' the. saw, and a'retaining device engageable with l anuppersportion of the sleeve andcmovableinto andfout-of position above the upper end oithe post forreleasably supportingthe sleeve oncthe,

upper end'oi' the postwhile adjustingthe sleevesupponting bearingiat aplane below the sleeve. 1

1 BEATRICE A. MANN, Administr trircof the Deceased.

" REFERENCES CITED I file ofv this patent;

UN ITED- STATES PATENTS Number Name. Date v 354,498 'Vandon Kerchove a-- De c.1 4,188 '6 1,040,419 Rightmire Oct. 8, 1912 1,083,160 Villinger a; Dec. 30, 1,183,813 Green May 16,1916 1,273,043. Densmore Juiy e, 1911s.;

' 1,27 ,092 Mann 'Aug. 20,1918} 1,528,346 Stampen Mar. 3, 1925., 1,559,926 Adair Nov. 3,;925; l,7Q8,903. Schroder Apr. 9,. 1'92 9 Estate of; Seward W. M 5

-B'oic c Aug. 1 3,1 19,49,;

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