US1537130A - Power-operated sawing mechanism - Google Patents

Description

May 12, 1925.

E. NIXON PQWER OPERATED SAWING MECHANISM Filed Sept-15, 1922 2 Sheets-Sheet l May 12, 1925. 1,537,130

E. NIXON POWER OPERATED SAWING MECHANISM Filed Sept. 15, 1922 2 Sheets-Sheet 2 Patented May 12, 1925.

UNITED STATES PATENT OFFICE.

EARL NIXO'N, OF BOLIVAR, IENNSYLVANIA.

POWER-OPERATED SAWING MECHANISM.

Application filed September 15, 1922. Serial No. 588,428.

To all whom it may concemf Be it known'that I, EARL N xon, a citizen of the United States, residing at Bolivar, in the county ,of estmoreland; and State of Pennsylvania, have invented certain new and useful Improvements in Power-Operated Sawing Mechanisms, of

mechanism, and a novel type of saw frame permitting of the'use of a full length saw blade to effect sawing of meatand other articles. a

Other objects and advantages of this invention will be apparent during the course of the following detailed description.

In the accompanying drawings, forming a part of this specification, and. wherein similar reference 'characters'designate corresponding parts throughout the several views, I r

Figure 1 is-afside elevation ofjthe improved power operated sawing mechanism, showing the saw arrangement thereof in full and' dotted lines to designate various positions thereof. 7 a p a Figure 2 is a longitudinal cross sectional view, taken substantially on the line 2'2 of Figure 3.

Figure 3 is a side elevation partly in section, showing cooperating features of the improved power operated saw.

Figure 4 is a transverse cross sectional View, taken substantially on the line 4- 1 of Figure 3.

Figure 5 is a rear elevation of the mounting of the improved power operated saw.

Figure 6 1s a fragmentary View, partly in section, showing the manner in which the improved power operated saw may be movably supported.

In the drawings, wherein for the purpose of illustration is shown but thepreferred embodiment of this invention, the letter A generally indicates the improved sawing mechanism, which principally comprises a work table 13; power operated saw C; sup porting frame D; and counter balance mechanism E. v o

The work table B may be of any approved type, including the ordinary chop ping block 10,'support-ed as by legs 11,

The improved power operated saw 0 may includea casing 13, preferably cast of al-u- 'minum or similar light material, including the "box portion 14 which provides a chamber 15 therein, and a cover 16 whlch is detachably positioned over one side of the box portion 1 1, as by the detachable counter sunk screw elements 17. The box portion 14 may have the rear handle 18 thereon of any formation. A frame 2O ispreflerably slidably carried by the casing 13, which includes upper and lower portions 21 and 22 respectively, ,-hav ing certain straight line portions thereof which slidably extend into the chamber15 of the casing 13' through apertures- 23provided in the front wall 2 1 of the casing 13.

its outer end, beingsubstantially U-s'haped in formation, to provide the lowermost substantially horizontalToffset portion 26,

Y which extends substantially parallel with the main portion 27 thereof, and in spaced connected relation therewith, as by a bight portion 28; The ends of the portions 21 and 22 extending'into the chamber of thecasi-ng The lowermost portion 22 of the frame 20 1s ofnove'l formation at 13 are guided as by lugs 30 rigid with said 1 i casing 13, and providing passageways 31 for j z said frame 20. A cross bar 33 preferably connects the portions 21 and 22 of the,

frame 20 within the chamber 15. The for ward end 34' of the frame portion 21 is downturned and provides a pin orother device 35 for the securing of an end of a saw. blade 36 thereto the opposite end of said saw blade 36 being connected as by an adjustable device 37 to the depending end of the frame portion 26, and substantially as is illustrated in Figures 1 and 3 of the drawings. The provision of the novel type of frame portion 22 permits the use of a relatively long blade 36, since when the" frame 20 is in its most retracted position with respect'to the casing 13, as is illustrated in Figure 1 of the drawings, the frame portion 26 lies immediately below the lower wall 39 of the casing 13, and in over Gil lapping relation therewith, whereby the blade 36 is also in overlapping relation with said casing 13.

The saw reciprocating means 40 is provided as a part of the improved power operated saw C, which includes a worm wheel or gear 41 rotatably mounted as by a pin 42 within the chamber 15 of the casing 13, at the most rearward end thereof adjacent the handle 18. A worm shaft 44 is preferably rotatably mounted within the chamber 15, having opposite ends thereof carried by the top and bottom walls 45 and 39 respectively of the casing 13, so that said worm shaft is in meshing relation with the teeth of the gear wheel 41. In order to effect proper mounting of the worm 44, certain bearing lugs 46 have been provided extended inwardly of the chamber 15 and preferably integral with the casing 13. The 'top end of the worm shaft 34 extends outwardly of the top wall 45 of the casing 13, and is connected as by a universal joint 48 with a flexible drive shaft 49 of any approved type. A connect ing rod 50 is eccentrically pivoted, as at 51, to the worm gear 41, and at its other end is oscillatively connected, as at 52, to the cross bar 33 midway of the ends of the latter.

Referring to the supporting arrangement D, the same includes a substantially L-shaped frame member 52, which includes a leg 53,

of straight line formation, which is provided upon its rearward offset end 54 with a plate 55 adapted for detachable connection to a suitable lug 56 provided as a part of the easing 13. The other leg portion 57 of the frame member 52 depends forwardly of the saw 0, and has a ring shaped socket end 58 adapted for lateral sliding upon the horizontally positioned guide rod 59 which is supported upon a side 60 of the chopping block 10 in spaced relation therewith, as by supporting brackets 61. A diagonal cross brace may be provided for bracing the leg portions 53 and 57 of the frame member 52 to maintain them in stable relation.

Referring to the counter balance mechanism E, the same preferably includes a tubular guide barrel 66 which is vertically mounted, as by a bracket 67 the latter being connected in rigid manner upon the front surface 60 of the chopping block 10, so that the barrel 66 extends upwardly from the chopping surface 68 of block 10. The upper end of the tubular member 66 is preferably provided with a roller or pulley 69 adapted to receive a flexible cable 70 which is trained thereover. One end of the cable 70 may have a counter weight 71 thereon which is adapted for reciprocable disposition in the longitudinal passageway 72 of the tubular guide 66. The opposite end of the cable 70 is prefe ably attached, as by a clamping clip 73, to the guide member 52 adjacent its offset connecting end 54.

In operation, the flexible cable 49 is connected at its ends remote from the saw G to a suitable power source (not shown) as the shaft of a motor.

Upon operation of the shaft 49, the worm 44 will be rotated, so that the wheel 41 will be moved in order to reciprocate the saw frame 20 through the connecting rod 50, so that the blade 36 may travel back and forth in the ordinary manner for cutting purposes. The operator, of course, grasps the handle 18 and it is merely necessary to lower the saw C onto the article to be out, which is ordinarily mounted upon the block 10. This lowering operation is manually effected, since the counterweight 71 is adapted to facilitate upward swinging of the free end of the saw into the position substantially illus trated by the dotted lines in Figure 1 of the drawings. The saw C may be laterally adjusted over the chopping block 10 by reason of the lateral sliding connection of the frame 52. with the guide supporting bar 59, the

cable 70 permitting of this sliding due to its flexibility.

, From the foregoing description of this invention, it can be seen that a relatively simple, yet compact and practical power oper ated saw mechanism has been provided, which utilizes novel methods of mounting and arrangement of parts so that a full length saw blade may be utilized which will not interfere with the reciprocating mechanism thereof.

Various changes in the shape, size and arrangement of parts, may be made to the form of the invention herein shown and described, without departing from the spirit of this invention or the scope of the claims.

I claim:

1. A device of the class described comprising a supporting arrangement having a handle thereon, a saw blade, a frame having upper and lower strips slidably extending through said supporting arrangement, the upper strip being provided with a downturned forward portion and adapted for connection with a saw blade, the lower strip having its forward end portion carried downwardly and then rearwardly and having its free end portion extending downwardly and adapted for connection with a saw blade, whereby a relatively long blade may be used which is adapted for exterior overlapping relation with respect to said supporting arrangement when in rearward position with respect thereto, and means carried by said supporting arrangement for reciprocation of said saw.

2. In a saw device, a casing having one end provided with upper and lower openings, a blade carrying frame having upper and lower strips slidably passing through the openings in said casing, the upper strip having its outer end portion provided with a depending arm adapted for connection with a saw blade and the lower strip having its outer end portion extended downwardlyand then rearwardly in a plane for extending beneath the casing when moved rearwardly move beneath the casing when moved rearwardly, a cross bar connecting said stri 8 Within the casing and operating'means int e casing connected With the cross bar for i1nparting reciprocating i movement to the frame.

EARL NIXON.

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