US1216669A - Hacksaw-machine. - Google Patents

Description

1. DUD'LEY.. HAOKSAW MACHINE! APPLICATION FLED MAY I8. |916'.

Patented Feb. 2o, l1917'.v

JOB DUDLEY. or` HAMILTON, ONTARIO, LO'ANADA;

HaoKsAW-MAOHINE.

Specification of Letters 1321.131112.

Patented Feb. 2o, 1917.;

Y Application inea May 18,1916'. seriaino. 98,371( f a' new and luseful Hacksaw-Machine, ofA

l which thefollowing is a specification.

- My invention relates'to improvements in hacksaw machines vfor cutting or severing metalvbars, pipes and the like, andY in' which two horizontally reciprocating saw blade arms operate in vunison with each other and inv the'same vertical plane, upon the metal bar by means lof novelly constructed' mechanism in connection witha drive wheel. v

The objects of my invention are, first, -to provide an apparatus for effectivelysever-y ing .bars of hard'metallin a substantialfreduction ofthe time which was hitherto Vrequired to accomplish thatwork, secon'dyto providey a machine Vof this character which is durable andaccurate in its work, third,to provide means whereby .two saw-bladey arms can be operated simultaneously, one cutting upward and the other cutting downward, and fourth, to afford means wherebyl a continuouscutting motion is attained. Y v i 'I attain these objects by the mechanism illustrated inthe laccompanying drawing, in which y Figure 1 is a side elevation of' the ventire machine, showing the mechanism in operating position: A 1 Fig. 2 is an enlarged detail view 'of-the balance arm hubV with the nearest bearing and integral guide removed in order to more clearly illustrate the method Ofanto# matically locking saidarmg' y' '-1 Fig. 3 is a rear detail view through the line 8f3: in Fig. l of the drawing, 'and Fig-L 4 is vany enlarged detail top viewof therear slotted member,V the rear lblade arm guides, and a portionvofsthe'bladearms, f YSimilar characters of reference refer to similar parts throughout the several 0Vviews. The table B, thepostv C, andthe legs D and. E, constitute the framework' of the machine.' w p, Y The metal bar or pipe 2 windu".isi-150bev cut, isins'ertedV betweenl the jawsv3'v'and 4 of a!vi se,'the jaw 3 of which isrigidly secured' `tothe table B by means Yof a bolt', but may be longitudinallyv adjusted to aldesired posi'- tion by the manipulation: of" said?A bolt..

the.. bar 2, vwhich may' fbe of! any vreasonable 's1ze,`.is f placed in position, the jaw 4 1s tightenedagainstf` it by'means lof the screw -6 which threads through ,the upper endpart of the post CQ* A suitable'handle "Tis fixed to the opposite endfof the screw 6 for turning purposes Y l The above partsv are not new, and? do not form part ofmy invention.

-..9 .and 10 arefsaw-blade arms provided i.

with integral arched forward end portions 11 and 12V respectively and 'a saw-blade 13 is rigidlyy secured to `respectiveheads on either end of Veach said integral' arched por- .y

tion. f f

y The saw-blade arm's9 `and 10 are adapted to reciprocate y simultaneously,` the' sawblades meetingeach other as the-metal bar is cut through. 'The said arms are operated by means of the mechanism now to be described.l y

j An Aoscillatory lever 14 is fulcrumed'at its central point to a rigid bearingl onthe table B, its upper end part being: pivotally connected to a shaft 16, the opposite end of which shaft is pivotally connected to a drive wheel 17 at a perimeter;

point between its center and its The drivei'wheel'lf issuitably andsubstan- Y tially' journaled in -a v'rigidv bearingon the rear end partof thetable, and is adapted to rotate by meansof anypsuitable power. The upper end part vof the lever 14 is also pivotallyconnected to aflink'19, the oppo-v site vendl'of which link is connected in the same ymanner to an integral projection on the saw-blade 'arm 9, and a similar link 2() isconnected in like manner, to the lower end part of thelever 14 and to a similar integral projection on the saw-blade arm 10.

` It can be seenlthat lthe rotation, of `the wheel 17 willcause the saw-blade' arms' 9 and 10 to reciprocallyosc'illate by means of l the above 'described mechanism! [21 .are -parallel perpendicular members rigidly-secured to'therear end partof the table B, and provided with vparallel horizontal vvslots' 22; *The* rear `V en d parts of f the arms'9 and v10 are'lgadapted to slide between saidmembers 2l", and Vare retained at a uniform distance fapartby means ofv-boltsQS" which ,pass through the same, their ends protrudinginthe Vsaid slots. y Y

144It maybe 4said.thatthe length of theslots 22, and the distance traversed by the end table B, and at its upper end part to a ver- .A

`; tical bracket 26 which is rigidly securedv by eoV means of bolts `to the said table flush with the side thereof, as shown in Fig. 3 of the drawing. The said `guide 24 is retained .at substantially the same distance from the side of the table B andbracket 26 as the width of the saw-blade arms 9 and 10, by means of a bushing 27 around the bolt at itsupper end part, and at its lower ,end part by a balance arm hub 29 hereinafter to be described. Y

lIhe arrangement of the guide 25 is similar to that `of the guide 24, excepting for its lower end part which is retained from the table by means of a bushing around a bolt 30. l

The lower saw-blade arm 10 is tens-ioned against the material which is being out, by means of a balance lever 31, which is pi-voted at its central hub 29 to a bearing 32 on the lower end part of the guide 24. The said bearing is also the heretofore described means for securing the lower end part of the guide 24 to the face of the table B.

- The said balance lever is provided with an integral rounded frontend part 33 adapted to engage with the integral arched .portion 12 of the saw-.blade arm 10 as shown. The opposite and rear end of said vbalance lever is provided with a counter weight 34 which is considerably heavier than the sawblade arm 10. It can be seen that by this means, the said saw-blade arm is always tensioned against the material which is being cut.

When the material is cut through, the two saw-blade arms will naturally `contact with each other, and the weight of the upper arm 9 combined .with that. of the lowerl arm 10, resisting the counter weight 34, will bring said arms to a point lower than that of actual commencement of work. This act automatically lock-s the `'balance lever' 31,-in the manner to be described, in order that there may be no pressure when the ymach-ine is not in use. v

A vertically slidable latch jlts loosely between the guide 24 ,and theface of :the

table VB, its ends protruding ,through Wertically d-isposed guide slotsv36 in the said guide and table. 'Ihe hub 29 i-s .provided with a notch 37V which is substantially the same width as the slots .36. IVhen the balance lever 31 is tilted as when the machine is operating, the latch 35 rests upon the circumference of the hub 29, but when the cutting operation is finished, and the weight of the sawfblade'arms 9 and 10 causes the balance lever 31 to level, the notch 37 VYin the hub 29 arrives flush with the slots 36 allowing the latch 35 to descend into the "said notch, thereby eiectively locking said balance lever.

VAs illustrated in the drawing, the respective saw-blades y1.3 are set` slightly in from the faces of the arms 9 and 1:0, in order that they may not touch one another when the said arms contact.

Having fully described my invention, what I claim and desire to secure by Letters Patent, is

1. In a haclsaw machine ,of the charac- I ter described, :a table, a rear projecting memaforesaid arm and to operate upwardly in i the same yertical plane therewith, means for oscillating said arms, a balance lever fulcrumed to the frame, a counter weight secured to one end of said lever, an integral rounded portion` on the yopposite rend of said lever and tensioned against the upwardly acting saw-blade arm, and means for automatically locking said ylever when the machine is not operating. c i

,13. In a hacksaw machine of the character described, the combination of a frame and table, vertically disposed guide varms rigidly secured to said frame, horizontal sawblade arms adapted to reci-,procally oscillate in one vertical plane land between said guide arms, a rear projecting member secured to said table and provided with parallel horizontal slots7 -means on ithe :rear ends of said saw-bladeiarms adapted to engage with said slots, and means lon said table to oscillate said arms, substantially, and for 'the purpose specified.

4. iIn a hacksaw machine of :the character described, the combination of a frame and table, vertically disposed, front, and lateral guides rigidly secured -to said yframe in alinement, horizontal saw-blade arms adapted to .reciprocally voscillate in one vertical plane determined by s aidguides, afrear projecting member secured Lto said table and 151;

provicled with horizontal slots, means on In witness whereof, I have hereunto afthe rear ends of said saw-blade arms adaptfixed my Signature atv Hamilton, Ontario,

ed to engage with said slots, means on the Canada. table to osollate said arms, and a balance i A lever fulorumed to the frame and tensioned upwardly against the upwardly acting arm, Witness: substantially as set forth. ,Y H. G. HUNDRY.

Y JoB DUDLEY.

Homes of this patent may be obtainedvfor ve cents each, by addressing the Commissioner of Patents, Y

Washington, D. C.

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