US2412704A - Portable saw - Google Patents

Description

Dec. 17, 1946.

4; c. JAQUE'S PORTABLE S AW Filed Feb. 18, 1946 3 Sheets-Sheet 1 IN 1 11A 1 uk.

JOHN C. JAQUES.

ATTORNEYS Dfli. 17, 1946. J c JAQUES 2,412,704

PORTABLE S W Filed Feb. 18, 1946 3 SheetsSh eet 2 JOHN C. JAQUES.

INVENTOR.

' ATTORNEYS J. C. JAQUES PORTABLE SAW Dec. 17, 1946.

Filed Feb. 18, 1946 3 Sheets-Sheet 3 INVENTOR.

JOHN C. JAQUES" ATTORNEYS Patented Dec. 1 7,1946

PORTABLE SAW John C. Jaqucs, Denison, Tex.

Application February is, 1946, sem No. 848,351

8 Claims. (Cl. 143-43) This invention relates to new and useful improvements in portable saws.

One object of the invention is to provide an improved portable saw of the type known as one-man DOWEX SaIWS.

Another object of the invention is to provide an improved saw of the type described which is compact and simple in construction and wherein the load is substantially equally balanced forward and rearward of the transverse supporting axle, thus making for easy handling and reducing the physical exertion required in operating the saw.

A further object of the invention is to provide a simple and compact power plant and drive conveniently arranged and controlled.

Still smother object of the invention is to provide an improved saw mechanism and mounting therefor which positions the saw in advance of the portable support and provides for adjustments whereby horizontal and vertical sawing may be done, as well as contributing to a clean out constructlon.

A construction designed to carry out the invention will be hereinafter described together with other features of the invention.

The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings,

wherein an example of the invention is shown, 30

and wherein:

Fig. 1 isa side elevation of a portable saw con-. structed in accordance with the invention,

Fig. 2 is a. plan view of the same,

Fig. 3 is an enlarged transverse, sectional view taken on the line 3-3 of Fig. 2,

Fig. 415 a plan view of the belt tightener,

Fig. 5 is a partial view of the saw driving mechanism, partly in elevation and partly in section,

Fig. 6 is an enlarged transverse, sectional view taken on the line 66 of Fig. 1,

Fig. 7 is a side elevation of the same,

Fig. 8 is a transverse view of the rear torque tube mounting, and

Fig. 9 is a side elevation of the same.

In the drawings, the'numeral I ll designates a horizontal frame which converges toward its front end. Between the transverse center of the frame and its front end. said frame is secured on a transverse axle H by U-bolts l2 supported. in ground wheels II, which places said transverse center well back of the axle. A front standard I3 is fastened on the front end of the frame and stantially at the transverse center thereof.

2 The front standard I 3 has a semi-circular clamp or collar member I! secured to its upper end and a complementary clamp member i6 is hinged thereto at it. See Figures 6 and '1. The members i5 and it constitute a split clamping collar. The collar members 95 and it have complementary longitudinal lips it. A screw-threaded linch pin i9 is screwed throiigh the lips and by swinging the handle of the pin, the collar members are tightened or loosened about a torque tube 28 extending through the collar,

The rear end of the torque tube is supported in a collar member [15' similar to the member it and secured on the upper end of the rear standard it. See Figures 8 and 9. The upper. collar member it is hinged to the member it at H andboth members have lips it connected by a linch pin is, whereby the torque tube may be clamped or loosened. The rear end of the tube is formed with an outwardly-directed annular flange 29 which abuts the rear end of the adjacent clamp collar. The forward end of the tube, which extends forwardly of the standard it, has an outwardly-directed annular flange 22 which is bolted to the rear side of a gear box or head 23. See Figures 1 and 2. This box has a cap plate 24 bolted thereon. A depending sleeve 25 has an annular flange 26 at its upper end bolted to the under side of the box.

A vertical saw shaft 27 is journalled in roller bearings 28 and 29, respectively, at its lower and i upper ends. A bevel gear 30 fastened on the upper angles by rotating the torque tube 20. A group of teeth or lugs 34 (Figures 2 and 7) are arcuately arranged on the tube contiguous to the front.

edges of the collar members l5 and I6 and a latch 35 pivoted on the member I6, is adapted to engage between the teeth to hold the tube against rotation, once said tube has been rotated to the desired position. The linch pins I9 and I3 are employed to fastenthe tube in the clamp collars.

For driving the saw shaft, a bevel gear 38 is fastened on the forward end of a drive shaft 31 in the gear box 23 and meshes with the gear 30. The shaft is journaled in roller bearings 38 at the end of the tube. The rear end of the drive a rear standard 14 is secured on the frame subshaft extends from the tube and has, fastened thereon a twin-groove driven pulley 39. A power plant in the form of a to the opposite end of said lever.

vent stripping of the gears; also, by releasing the 3 gasoline engine II and a fuel tank I is mounted on the rear end of the frame l0. v

A twin-groove drive engine shaft is somewhat less in diameter than the pulley 39. V-belts 43 connect the pulleys; These belts are of such length as to require a belt tightener to make them track in the grooves of the pulleys. An idler pulley l5 Journaled on a shaft extending rearwardly from the upper end of .a' tightener arm 41 engages. the inner.

faces ofthe belts; The arm ispivoted at its lower end on a-stud 48 extending from the side of the standard I4. A forwardly extending bracket 49 is secured to one side of the engine 40 and a bell-crank lever 50 is pivoted on this bracket;

the forward end of said lever being connected to the tightener arm by an angular link 5| and the pitman 52 of a hand lever 53 beingLpivoted A pair of rearwardly extending handle bars 54 have their forward ends attached to segment plates 55, fastened on each side of the rear end of he frame III, by bolts 56. Each plate has a plurality of holes 51 arranged concentrically to the bolts 56. I Bolts 58 extending through the handle bars are engaged inthe holes to fasten said bar at various inclinations. The bars have hand grips- 59 at their rear ends and are connected by a bridle'bar B0. The hand lever 53 is pivoted to the left-hand,

right-hand handle bar 54 (Fig. 2). The rear end of a throttle rod 62 is pivoted to the lever 61, while its forward end is attached to the throttle of the engine (not shown). When the engine lllis running, the belts 43 will be loose and motion will not be imparted to the pulley 39 until the belts are tightened by the pulley; therefore, a clutch is not required. To drive the saw 3|, the operator merely has to squeeze the hand lever 53 toward the grip 59 which will pull the pitman 52 rearwardly, thereby actuating the lever 5|! to swing the arm 41 outwardly and cause the idler pulley 45 to tighten the belts 43.

The belt drive is very advantageous because if the saw should stall, the belts will slip and prepressure on the hand lever 53 a certain amount of belt slippage will result and the speed of rotation of the saw must thus be controlled. The weight of the parts forward of the axle l I will be substantially equal to the weight of the elements back of said axle and when the saw is being used, the load forward of the axle will substantially counterbalance the load rearward of said axle. This disposition of loads makes the saw easy to manipulate and minimizes the labor. The foregoing description of the invention is explanatory thereof and various changes in the size, shape and materials, as well as in the de-' tails of the illustrated construction may be made, within the scope of the appended claims, without departing from the spirit of the invention.

What I claim and desire to secure by Letters Patent is:

, 1. A portable saw including, a frame mounted on ground wheels, a pair of upstanding standards spaced longitudinally on the frame, releasable clamps on the upper ends of the standards, a longitudinal torque tube removably secured in-s'aid 1 clamps and overhanging the front end of the frame, a circular saw suspended from the front end of thetube. saw driving means extending '75 pulley 42 fastened on the i I with the belt tightener.

- through the tube connected with the saw, an enine mounted on the frame in ,rear of the stand- 'ards, and a flexible readily disconnectable driving connection between the engine and the saw driving means, the only connections between the torque tube and saw frame being the engagement of, the tube in the pair of clamps and the flexible driving connection between the engine and the saw driving 'r'rieans, whereby the entire torque l0 tube along with the circular saw may be removed by disconnecting the flexible driving connection and releasing the pair of clamps.

2. A portable saw including, a frame mounted onground wheels, a pair of upstanding standards spaced longitudinally on the frame, releasable clamps on the upper ends of the standards, a

a pulley disposed at the rear end of the torque tube and connected to the saw driving means, an engine mounted on the frame inrear of the standards, a vertical belt drive between the engine and the pulley connected to the saw driving means, a. handle bar extending rearwardly from the frame, a belt tightener mounted on the frame between the engine and the torque tube and having a pulley engaging the belt drive, and actuating means mounted on the handle bar connected 3. A portable saw including, a frame mounted on ground wheels, a pair of upstanding standards I spaced longitudinally on the frame, releasable clamps-on the upper ends of the standards, a longitudinal torque tube removably secured in said clamps and overhanging the front end of the frame, a circular saw suspended from the front end of the tube, saw driving means extending through the tube connected with the saw, a" pulley disposed at the rear end of the torquetube and connected to the saw driving means, an engine mounted on the frame in rear of the standards, a vertical belt drive between the engine andthe pulleyconnected to the saw driving means, a handle bar extending rearwardly from the frame, a belt tightener mounted on the frame between the en- 50 .gine and the torque tube and having a pulley engaging the belt drive, and actuating means r mounted on the handle bar conne'cted with the belt tightener, the only connections between the torque tube and saw frame being the engagement of thv tubein the pair of clamps and the belt drive between the engine and the saw driving means, whereby the entire torque tube along with the circular saw may be removed by disconnecting the belt drive and releasing the pa of clamps. r

4. A portable'saw including, a frame mounted on ground wheels, a pair of upstanding standards spaced longitudinally on the ,frame, releasable clamps on the upper ends of the standards, a saw unit including an elongate torque tube, a circular saw suspended from the front end of the tube, saw driving means extending through the tube I and connected with the saw, a pulley disposed at the rear end ofthe torque tube and connected to the saw driving means, said saw unit being removably secured as a unit in the releasable clamps so as to be supported and held by the upstanding standards, the forward end of the torque tube overhanging the frame, an engine mounted on the frame in rear of the standards, a flexible a readily disconnectable endless drive between the engine and the pulley carried on the new unit, and means for controlling transmission of power by the endless drive, the saw unit being removable as a unit by disengaging the endless drive from the pulley and releasing the clamps.

5. A portable saw including, a frame mounted on ground wheels, a pair of upstanding standards spaced longitudinally on the frame, releasable clamps on the upper ends of the standards, a longitudinal torque tube removably secured in said clamps and overhanging-the front end of the frame, a circular saw suspended from the front end of the tube, saw driving means extending through the tube connected with the saw,

a pulley disposed at the rear end of the torque tube and connected to the saw drivin means, an engine mounted on the frame in rear of the standards, a belt drive between the engine and the pulley carried by thesaw unit. a handle bar extending rearwardly from the frame, a belt tightener mounted on the frame having means engaging the belt drive, and actuating means mounted on the handle bar connected with the belt tightener, the saw unit being removable as a unit by disengaging the belt drive from the pulley and releasing the clamps.

6. A portable saw including, a frame mounted on ground wheels, a torque tube mounted longitudinally on the frame. a circular saw suspended from the front end of the tube, saw driving means extending through the tube connected with the saw, a pulleydisposed at the rear end of the torque tube and connected 'to the saw drivin means, an engine mounted on the rear of the frame and having a forwardly directed pulley disposed beneath the saw driving pulley, said pulleys having their rotational axes parallel to the iongitudinal axis of the torque tube, a vertical belt drive between the two pulleys, a belt tightener mounted on the frame having a roller engaging the belt drive between the upper and lower pulleys, and means extending longitudinally of. the frame for actuating the belt tightener.

7. A portable saw including, a frame mounted on ground wheels, a torque tube mounted longitudinally on the frame, a circular saw suspended from the front end of the tube, saw driving means extending through the tube connected with the saw, a pulley disposed at the rear end of the torque tube and connected to the saw driving means, an engine mounted on the rear of the frame andlhaving a forwardly directed pulley disposed beneath the saw driving pulley, said pulleys having their rotational axes parallel to the longitudinal axis of the torque tube, a vertical belt drive between the two pulleys, a belt tightener mounted on the frame having a roller engaging the belt drive between the upper and lower pulleys, a handle bar extending rearwardly from the frame, and actuating means mounted on the handle bar connected with the belt tightener.

l 8. A portable saw including, a frame mounted on ground wheels, a pair of upstanding standards spaced longitudinally on the frame, releasable clamps on the upper ends of the standards, a saw unit including an elongate torque tube, a circular saw suspended from-the front end of the tube, saw driving means extending'through the tube and connected with the saw, a pulley disposed at the rear end of the torque tube and connected to the saw driving means, said saw unit being removably secured as a unit in the releasable clamps so as to be supported and held longi tudinaily with respect to the frame by the upstanding standards, the forward end of the torque tube overhanging the frame, an engine mounted on the frame in rear of the standards and having a forwardly directed pulley disposed beneath the saw driving pulley, said pulleys having their rotational axes parallel to the longitudinal axis of the torque tube, a vertical belt drive between the two pulleys, a belt tightener mounted on the frame having a roller engaging the belt drive between the upper and lower pulleys. and means for actuating the belt tightener.

JOHN C. JAQUES.

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