US2612920A - Hacksaw - Google Patents

Description

HACKSAW F. F. WILLIAMS Oct. 7, 1952 Filed Aug. 28. 1950 Patented Oct. 7, 1952 This invention pertains to hacksaws, and relates particularlyto the novel construction of a hacksaw wherein the cutting blade is anchored in adjusted `"positions l firmly against rotation "about its longitudinal axisf It is a principal object of th'ep'resent invention to'f'provide a hacksaw in Whichfthe cutting blade is held securely and firmly initsfoperative position.-`

Another object of thisinvention is the provision cfa hacksaw'wherein the cutting blade is secured againstrotati'on or other displacement `about its longitudinal axis.

"Another object of-this invention is the provision of a hacksaw. the blade of which may be adjusted to "operative positions both in the' plane of the frame andA at right angles thereto.

Still another object of this invention is the provision of a hacksaw which is adjustable to accommodate blades of different lengths.

\ Another object of this invention is the provision of a hacksaw which is adjustable to a` keyhole type saw `useful when Working in a confined environment. y j

Still` another object of this invention is the provision of a hacksaw, the blade 4of whichmay be vsecured against rotation without binding of the securing mechanism. l

Still another object of thislinvention is the pros vision of a hacksaw having the foregoing advantages,` yet being of simple, inexpensive construction;

These and other objects and advantages of the present invention will appear from the following detailed description taken in connection with the accompanying drawing, in which:

Fig. 1 is a side view of a hacksaw embodying the features of this invention;

j Fig. 2 is aside view of a modified form of hacksaw embodying the features of this invention;

Fig. 3 is a sectional view taken along the line 3-3 in Fig. 1; and Fig. 4 is a fragmentary sectional view taken along the line 4-4 in Fig. 1.

The hacksaw of the present invention includes lthe main body section I provided at one end with a hand grip 2. In the embodiment illustrated, the main body section is constructed of metal bent, as shown in Fig. 3, to form a channel member of U-shaped cross section. An extension member 3 is proportioned to be received slidably the section I in the directlonlof theterm'lnal endl within the forward end of section I, i. e. the end v opposite handle 2. Notches 4 provided at spaced intervals along the extension 3 detachably engage the pin 5 secured between the sides of the channel member I at the forward end of the latof thehandle 2. l forwardly of and adjacent the anchor arm lj by'l means of pivot pin IU secured between the sides" of the body section I. 'The "adjusting leverfisf provided with` van Velongated slot `II extending` obliqueiy with respect to its longitudinal axisithe said slot receiving the pivot pin ID, as shown; lA` threaded adjustment screvs7`l lf2 projects rearwardly" toward handle 2 from" the lever 9 and eidiexidls,"4 slidabiy through a hole la provided in the anchor arm. As indicated in the drawing, the hole 1I3 is preferably elongated in the direction of. the; longitudinal dimension of thearichorI arm to acilever9.'` w j p An adjusting Wing "nutV I 4 is threaded upon the screw `I3. "Irhe4 forward end I5 of thenut is rounded forabutment with `the anchor arrnffl. Inl this manner,` the nut may `beA tightened against the anchor arm whenzthe screw positioned obliquely Withrespect to the latter wi'thoutcasing binding of the parts.

Lugs I6 and I'I project laterally from the sides of the terminal end ofextensi-on 3 and the adjusting leverv 9, respectively, to receive the apertured ends of the cutting blade 6. A second lug I8 is similarly provided on the lever 9 to accom` Inodate the assembly shown in Fig. 2.

, The terminal end of extension 33 is bent at a right angle to form a flange I9 from which the lug 20 projects. In similar manner, the adjust-` ing lever 8 is bent to form flange 2I supporting the lug 22. The lugs v2li and 22 accommodate installation of the cutting blade 6 in a plane extending perpendicular to the plane of the frame.

Referring now to Fig. 1 of the drawing, the cutting blade 6 is installed upon the frame in the following manner: Wing nut I4 is unthreaded toward the end of screw I2 sufficiently to pivot the lever 9 toward the end of extension 3 and draw the lugs I6 and I'I together a distance which will permit mounting of the blade I5 thereon. The nut I4 is'then threaded onto screw I2 to draw An adjusting lever Bis mounted oommodate tho slight pivotaro of me 'adjusting y .3. the lever 9 rearwardly and secure the blade between the said lugs. As Vthe nut is tightened, the lever 9 shifts automatically relative to the anchor arm l by virtue of the slot Il, whereby to align the screw l2 properly within the hole I3 in the anchor arm.

In the modification shown in Fig. 2, the installation of the cutting blade 6 is substantially as rdescribed hereinbefore with the exceptions that the modified extension 3 is used and the blade is mounted atl one end upon lug I8'.` This' construction permits vthe use of the hacksaw for y lationgand removalnf` cutting blades. The provision of the adjustinglever. its attached .adjustl ing scr-ew 4and the anchor .arm insures the. positive attachment of the cutting blade to the frame and obviates the possibility of `displacement of. theblade during the cutting operation.'

lt, will be apparent tok those skilled in rthe art Jthat various modications and .changes may be made. inthe structural details-described hereinbefore without ydeparting from the sc-opeland spirit of this invention.. Accordingly, the foregoingdescripton is to be 'considered as merely illustrative, the scope of the 'present invention being.. 'defined lby theappended claims. y

' AIP'Iav'ing now describedfmy invention. and the manner in which Vi'lhezsarne maybe used, what l- Ql-a'irn 'as newV and des'ire to secure by Letters Pat-- encis'.:

LLAhacks-awcormprising a frame, an anchor a-r'rn firmly secured ytoffand projecting from the iframe, -angadjus'ting leverfhaving a slot therein extending obliqluely to its longitudinal axis, `pivot means extending throughsaid slot and securing the lever a-djustably to `the frame, .adjusting means releasably interengaging'the anchor .arm

modates withl facil-ity and speed the: instal- `arm iirmlyv secured 'to and projecting from the frame and having a hole therein adjacent its free end, an adjusting lever having a slot therein .extending obliqu-ely to its longitudinal axis, pivot means extending through said slot and `securing viframe and having an elongated -hole therein adjacent its free end, an adjusting lever h-avinga slot `therein extending obliquely to its longitudinalv axis, pivot means extending through said slot vand securing the lever adjustably to the frame, an adjusting screw on the lever extending slidahly through the hole in the anchor arm. and means on th-e frame and adjusting the lever for detachably mounting av cutting blad-e therebetween. j Y

4. A hacksaw comprising a frame, an anchor arm firmly secured "to and projecting. fromithe frame and having a hole therein adjacentjits; free: end, an` adjusting Ylever having a slotl therein extending ohliquely to itslongitudinal axis, pivot.

means extending through said slot and securing the'lever adjustably to the frame, an adjusting screw on the lever extending sli-dably through thellfiole "in the anchor arm, a, nut engaging the screw :for abutment with the anchork arm, jsaid nut being rounded on the end abutting the an chor arm to permit angular A.positioning .of lthe lscrew relative to the anchor arm., and means lon the frame randadjusting lever fior detachably m'ountingacuttin'g blade` therebetween. v

. v .FRED E'. WILLIAMS.

- REFERENCES CITED The .following references are of recorelin1 the liley of this patent.: l

Number Name- V,941504 l Ducharme .Nov. .3Q,l9.09 1,471,214 Sieben Oct. '16,' 1923` 1,792,024 Maly y i"Feb. l0, 1931 FOREIGN PATENTS Number ycountry DateV 487,814 Germany Dec. 116, 19'292

Images