US1770294A

US1770294A - Motor-operated saw

Info

Publication number: US1770294A
Authority: US
Inventors: Blundell Ira George
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-03-12
Filing date: 1928-03-12
Publication date: 1930-07-08
Anticipated expiration: 1947-07-08

Description

y 1930. G. BLUNDELL 1,770,294

MOTOR OPERATED SAW Filed Marph 12; 1928 5 Sheets-Sheet 1 0 3Q Inventor v 17?; c Hum/Z Q q B %wew% qy July 8, 1930. G. BLUNDELL MOTOR OPERATED SAW Filed March 12, 1928 3 Sheets-Sheet 2 g .17 )3 Z 3 2 ll W 2 z 4 w 0 r 0 W w X N E BIVW/ Hu O 0 /0 Ur Inventor July 8, 1930.

l. G. BLUNDELL MOTOR OPERATED SAW V s Shets-Sheet 5 Filed March 12, 1928 Patented July 8, 1939 V'IRA GEORGECBLUN-DELL, or SPARKS, NEVADA IMQTQB-OPEBATED saw- A pplicationfiled l llarch 12,1928. serial No, 261,009.

, The presnt'invnbionrelates-to improvements inwood sawlng machines and has for its principal object to'provide a moto'roperated saw'that-will at all times be positive and efficient in its operation;

A further object of the invention i's-to provide a motor operated'saw that includes a rotatable saw carrying shaft, a sliding care riage or table being mounted on a stationary basev for feeding the material to the saw blade.

A further objectis to provide a motor operated saw of the above mentioned character which is simple in construction, inexpenslve, strong and durable, and further 'well adapted tothe purpose for which it-is deslgned. V

V Figure 4 is a sectional view', tak'enapproximately on the line 1 ofFigur'e 2, looking iii-the direction of the arrows.

Figure 5 is a rear side elevation. Figure 6 is a detail perspective view of the s'lidable carriage or table. I 1 i i Figure 7 is a detail illustrating the coupliing between the driven shaft and the drive s aft. Y v I In the drawings, wherein for the purpose of illustration is shown the preferred em-' 7 bodiment of my invention, the numerals'l and 2 designate a pair of longitudinally ex- .tending spaced beams. vmembers 3; extend transverselyacross the upper faces of these beams. Runners 4 are secured tojthe bottom faces of these beams, the ends of the runners'being disp'osedup 0 wardly against the respective endsuof the beams as clearly shown in the drawings.

Other objectsfofthe invention will become 7 Suitable bracing I 'An.engine supporting f rame designated generally 1 by the numeral 5; is arranged on the forwardiends'of the beams, and an in ternal combustion-engine of any well known construction is supported on this frame, in

any appropriate ,inannerithe engine being designated generally by the numeralfi. The

,racliator 7thatis opjeratively associated with the engine issupported at the'fro'nt end of the'frame 5 and also supported on the frame at one side of-the engine is the gasolinetank 8, the v supporting'bracket therefor being shown at "9, with reference 'more particularly to Figure 1 of the drawings. Suitable stand- ;ards 10 and ll' le'xtend'u pwardly from the" 'oppositelend portions of the ba'seformed by the

longitudinal beams

1 and 2, these standjards being arranged at the front side of the machine Similar standards 12and 13 extend upwardly from the opposite sides of the machine andthesevertical standards are arranged in' pairs. i i 4 An elongated rail l' 'extendsj across the outer faces ofthe vrear pair of

standards

12 and 13, as more clearly shown in Figure 5 and the forward e n'd of this rail is secured to the rear portion of the engine supporting frame 5. Suitable rollers 15 are carr'iedby the rail 14, and the purpose thereof will be hereinafterfmore fully described. 7

Cross bars 16 and 17 extend transversely acrossthe'upper ends of the respective pairs of standards; Suitablejbearings 18 are arrangedonthe upper faces of the cross bars 16 I and 17in, alignment with each other, for

accommodatingthe longitudinally extending driven shaft 19. A circular saw blade 20 is secured onthe rear end of the driven shaft 19 for disposition adjacent the outer side face,

of the rearwardmost cross bar216, asclearly shown in Figure 2. f

A. socket 21 isoperatively associated with the'drive shaft of the engine 6 and fitted in the outer end of-this socket and rotating therewith, is the stub shaft 22, that is arranged in horizontal alignment with theiforward end of the driven shaft 19 and a pulley '23 affords a coupling betweenthe adjacent 7 ends of the drive and driven shafts the ad- "jacent ends of the drive and driven shafts being keyed in the respective ends of the pulley as shown very clearly in Figure 7 This pulley 23 may be employed for driving other machinery and in Figure 2, there is illustrated the use of the pulley in driving an emery wheel 24 which is secured on one end of a stub shaft 25, supported in the outer end of the transverse arm 26, whichis secured to the outer face of the cross bar 17. The other end of the stub shaft has arranged thereon a small pulley 27 and a belt 28 is trainedover the

pulleys

23 and 27 The invention further comprehends the provision of a carriage or table for sup porting the material to be sawed and this unit is designated generally by the numeral 29 in Figure 6. This carriage or table comprises a pairof parallel spaced front and

rear side bars

30 and 31 respectively, and extending transversely .be-

tween these side bars are the parallel spaced rails 32. vA metal plate 33 is secured on the bottom face of the rear endportion of each rail 32 and these rails are spaced with respect to each other insuch relation as to dispose the rails in position over the several rollers 15, and the metal plates 33 will ride over these rollers asclearly shown in the drawings. As is further illustrated in the drawings, the rails 32 are of such length as to extend beyond the respective sides of the

beams

1 and 2, andthe ends of the cross bars 16 and 17. These cross rails 32 provide bracing means for the carriage or table 29, and additional bracing members 34 are provided.

A pair of boards 35 extend across the forward ends of the forwardmost pair of cross rails to provide a support for the piece of wood that is to be cut into small pieces by the circular saw blade 20 and extending upwardly from the front side bar 30 is the stop 36. This stop is in the form of a piece .of wood that extends for the full length .of the side bar 30 and the same is formed with a slot 37, adjacent the rear end portion thereof to accommodate the teeth of the circular saw blade 20. r I V The carriage or table 29 is adapted for slidable movement across the rear end portion of the machine and as heretofore explained, the

rear end portions of the cross rails 32 ride over the rollers 15.

The supporting means for the front side of the carriage or table 29 comprises a pair of leg members designated by the numeral 38.

These leg members are hingedly secured at their lower ends to the beam 1, as at 39,while the upper ends of the legmembers are hingedly secured tothe front side .rail 30 as at 40. Itis of course to beunderstood that the leg members 38 are notdisposed in the same vertical plane with the cross rails 32, so that said cross railswill not interfere with the swingingmovement of the hinged 16g members able brackets shown at 43.

An arm 44 is fixedly secured at its rear end to the rod 42.

A transversely extending foot actuated treadle 45 is hingedly secured at its rear end to the rear longitudinally extending beam 2 as at '46, at apointbelow the sliding carriage or table 29, and this swinging foot treadle is operatively connected to the forward end of the arm 44 by means of the chain 47. A

spring 48 is associated WltlltllG foot treadle for normally holding the same in a raised position and this feature is more clearly illustrated in Figure 4 of the drawings.

The operation of my improved wood sawing machine may be briefly stated as follows:

lVhen the parts are arranged as shown in Figure 2, the sliding carriage or table 29 is in its forward'most position. A log or other piece of wood which is to be cut up, is placed across the forward portion of the carriage as shown in Figure 3, so that the same will extend across the board 35 and will rest against the stop 36. With the engine 6 in operation,

rotary movement will be imparted to the saw carrying shaft 19. The material is then fed rearwardly against the saw blade 20 by pushing rearwardly on the sliding carriage or table 29, until the saw blade has cut entirely through the material and has entered the slot 37. It will be observed upon considering Figure 3, that the supporting legs 38 are disposed at an incline when the carriage or table is in its forwardmost position, whereas, when the carriage has moved to its rearwardmost position, these front supporting legs are disposed substantially vertically as shown in Figure 4. The rollers 15 cooperate with the metallic plates 33 to facilitate the free sliding movement of the carriage across the rear end portion of the machine and the carriage may be returned to its normal position by pulling the same forwardly. The table will reciprocate with a slight tilting motion of thefront portion thereof due to the hinged effect afforded by the provision ofthe leg members 38. The operator may control the speed at whichthe saw carrying shaft rotates by actuating the throttle lever 41, through the medium of the foot pedal 45 that is located in machine can be constructed at a very low cost.

Instead of employing runners, wheels may be associated with the base of the machine whereby the same is rendered portable so that it can be moved from place to place, whenever. desired.

While I have shown the preferred embodiment of my invention, it is to'be understood that minor changes in the size, shape,and arrangement of parts may be resorted to with p out departing from the spirit of the inventtion or the scope of the appended claim.

Having thus described my invention, what the bars, means for operatively connecting the forward end of the driven shaft with the drive shaft of the engine, a circular saw blade 1 secured on the rear end portion of the'driven shaft for rotation,therewith,a carriage arranged for slidable movement transversely across the frame for feeding the material to V be cut to the saw blade, supporting means for the slidable carriage, said supporting means comprising leg members hingedly secured at their lower ends to the base, the upper ends of the leg members being hingedly secured to the forward'end portion of the slidable carriage, a rail extending across the rear pair a of standards, rollers carried by the rail, and

extending'upwardly therefrom, the rear portion of the cariage adapted to'travel over said rollers.

In testimony whereof I affix IRA GEORGE 'BLUNDELL.

my signature