US1634508A - Composite blade for scissors, shears, etc., and cutter therefor - Google Patents

Description

July 5,1921. IL PATRICK 63 50s COMPOSITE BLADE FOR SCISSORS, SHEARS, ETC. AND CUTTER THEREFOR Filed April 16, 1925 azew ( I By Attorr leys,

INVENTOR Patented Jul 5; 1927.

'- Isaac PAT IC -or JAMAIcmnEw YORK; I

coivirosrrn BLADE Eon sorssons, sn'EAIts, IElTQ, Ann CUTTER menses.

hp pl ic ationjfiled April .16, 1925} Serial mfaasos. I ,j-

This invention relates toconiposite blades for scissors, shears an'd'the llke, one part ot which is a detachable cutter, .andis replace-- able by another when the edge thereof becomes dull, and also to a cutter, and aims to provide improvementsthereinl" c The invention provides composite blades for. scissors or shears of an improved construction whereby, a secure connection be tween the parts 'of' said blade is obtained.

The, improved construction is simple and well suitedi 'or large scale manufacture.

vTheinvention provldes a cutter or cutting part, which,' with the partsof the fastening I means formedthereon, is readily made from' a fiat strip of metal. v v

Certain pref-erred embodiments of the invention are illustrated in theaccompanying drawings, wherein,

Figure l is a side view of'the scissors. or

shears opened as in cutting, provided with I the improved composite blade.

' Fig. 2 is'an enlarged edge view of. the scise sols-with parts thereot, shown in section;

plane of the line 33 ofFig. 2.-

Fig. 4 is a transverse section taken on the plane ottheline 4-4 of Fig. 2.

Fig. 5 .isan edge view of the cutter ele- Fig. 6 is a top plan view of the' cutterele ment.

Figs. 7, 8 and 9 are detailvie ws'ofamodi fication of the cutter blade sh own in the preceding figures.

, Referring first to Figs. ltoi6 of the draw-1' ings, numerals 10, 11 indicate a pair of blades'having handles 12, 13 forming a scissors,.th e blades of which are pivoted, as in dicated at 15, and saidzblades being adapted to be opened and closed by the opening and closing of the handles 1 2,; 13in the usual andwell understood manner. One or both of the blades 10, 11 is a composite blade, and

as herein shown, both of said blades are of this type. The composite blade comprisesa cutteror cutting portion 17 and a supporting portion 18.

' The cutter 17 is preterablyin the form of a thin flatstrip of metal having a sharpened edge 20 thereon constituting a cutting edge.

The supporting portion 18 oncits inner face is provided with a shallow recess .22 in which the. cutter 17 is adapted to be fit or he and be fastened; The said supporting portion 18 at 3 is atransverse section takenonithe the lower part or to the} re ar of the" recess I 22 opposite-the cuttingedgeQO (whenisaid cutter-is insaidrecess)'-ispreferably p'IQY-f act of cutting. v

Means are provided for fastening the cut-" j ter 17" and theportion 18 together, and preferably these vmeans are. provided at or near thetwo ends of the cutter. These ineansare of such a character that the cutter- '17 'is sub manufacture, packing and. use. w

The fastening means 30 at the inner end of the cutter 17 is conveniently a prolonga- 'stantially fiat and is very QWell suited to tion 31 of the flat'fecessQQ to' o'r near the},

pivot .32of the scissors. Tlie cutter 17 -is' conveniently.providedlwith a tongue 33 projecting longitudinally thereof in the plane of the faces of the flat sides adapted to fit in" the prolonged portion ,31 of the recess 22.

The supporting portion 18 is provided with means for holding the inner end of the cut:

ter againstlthe,shou1der'25 thereon, and this means is conveniently ashoulder 3ft opposite the, shoulder 25, the shoulders'34 and 25 being spaced the width of the tongue 33' of the cutter 17, the part 31 of theg reccss is' at a part of the scissors which is normally covered,-or partly covered by theopposite blade during the normal use of the scissorsin cut.-

ting,.and the oppositeblade serves to'hold the cutter. 17 against the broad face of. the

recess 22.;

The two blades 10,11 are preferably, re

silie ntly drawn together at the pivotal con-I l nection, and tothis end, said connection is conveniently in the form of a hollow rivet32 havingla' head 36, and ,its opposite'end 3'7.

turned over; and confining between said ends and theblades .one or more spring washers 38. Theparts of thescissors as thus far dew scribed are substantially those as. described. in my applications'Ser. No. "(42,829, filed October 10, 1924, and Sen No. 23,505, filed April- 16,,1 925, I I I U Themain feature of novelty of the present invention residesin the means at thesouter end of the cutter for fastening it to the supe portingpart. As herein shown,.these means conveniently comprise a tongue and groove connection, the tongue or tongues .40 being, formed integrally with the cutter l7, and;

preferably extending in a ldirectionflongitudinally With respect to the cutter. Sa'id tongueseO are" also preferably so formed that a portion thereof 11 lies Within' the planes of the faces 01": the cutter 1?" and with parts 12 disposed in' planes"in 3 clined to the planes of the faces of the cutter and--- preferably 'inplanes inclined to the longitudinal dimension of the cutter. It is desirable that the tongues are resilient, and notwithstanding that they are formed from the"metal oi the blade of the cutter Which;isjpreferably of high quality spring steel, additional resiliency J is provided for thenn'by cutting openings 13 at the juncture ofsaicl tongues with the body of the cutter 17 To receive these tongues, the supporting part 18 is formed with a recess is at the inner face thereof adjacent the rear edge of the supportingfpart'to' a depth-corre spending to the thickness oi 'the cutter'17, and of a length substantially equal to" that ofthe'portion diet the tongues 10. And communicating With said recess are the inclined recesses 46 cut in the rear edge of the" supporting member 18, and adapted to recei've the angular portions 42' of. thetongues 10. p

In 'themo'dification'shown in Figs; 7, 8 and 9,'the tongnes 10" are formed with a portion 11' similarlydispos'ed with respect the cutter, asjsth'e' part 41 W th respect to the cutter17, but the inclined portion'sf42, it- Will be noted, have a muchless degree ofm clination With respect to theplanes of the cutter" than "these shown" in" the; preceding figures. Alsofinsteadbtf 1I1Clll1l recessesto' receive the 'portions42y, therearedgeof the supporting part 18 is'formedf Wit-h 'a'recess or roove 464111" its rear side, the faces of which eig't'eiid siibst'antially pa al parallel to the planes of the faces? of the critter 17, and the Width of said recess is'sub stai'itial'ly equal to the thickness of the cutter 17 or tongues 42. lVhen a cutter is fastened toa support through the medium of means. stichas hereinbefore describedas positioned atthewarender thebmd, it will beeppre'ciate'd that because of theres'il'ienoy of thetongues and the tendency" of the inclined parts'thereoffto assume their original "orfiat ositional the blade from Which they are f formed; that said "fastening means will tend" to cau's'efthe 'cutter'l'? to lie flat Within the" To fur recess 22 in the supporting pa'rt. thei insu're the-proper'engageinent and alignment of the cutter 17 on the support18'and to're'sist canting or twisting of the cutter in the recess 22, the"cutter'may provided withoiieorn'iore ribs 50,51 projecting from itsfbackpface 'an'd ada'pt'ed to fit into corresponding recesses of" depressions 52, 53

formed injthe supporting part 18*ot' the blade,i the' ribs and slots being preferably formed with parallel Walls: The formations piece blades.

to the inner face or thesupport ng part '18,*and thererore,

eseaes maintaintheirfproper' relation or (tension).

W'Vlien a cutter 17 becomes dullj'it maybe replaced by another,'the parts of 'thefasten iiig-mea-ns at the outer end of'the'scissor's being forced 'orsprungapart by the an ertion of 'a "sharp instrument 'between' thecutter' and its support, and the inner end 33.0fthe' cutter slid outwardly out of the portion3l of the reces's'22. The new cutter is replaced by placing 'theextension' 33 in the prolonga tion 31 I of 'the 're'cess and then snapping "the ears" 4:0 or 40 into their receiving" recess from the rearside' otthe blade.

The supporting portion '18 of the blade may be formed of analuminunior other alloy such as now known, possessing sameness and strength similar to steel by" :lie-sha1'3ing or casting. By this method, close uniformity.

in thesiz'e and s hape' of the supporting portions 18 of theblades may be obtained,

which would thusrender the substitution or renewal" oicutters 17' being made Without diiiiculty; A uniformtit betweenithe supporting part 18 and the cutterl'f used to Te 1 place other cutters 1 is thus "obtained.

The invention,itisto'be hnclerstood, receive 'ot-l'iei 'embodrments than those herein specifically illustrated and described, and-' may i be applied to othertypes of seiss'ors' or 'shears than herein illustrated. v

VVhatIcl'ai n is e A v 1.- Pa cempositetime cm riing a'jcut ter and a supporting partand meaiisffor fastening 'said parts together, said-c 'tte-rbeing, a flat plate eeinprising resilieii mean t they reariedge" thereof extending longitucii nall'y' 'With respect t0 the "cutter,- said nieah's: engag ng over the rear edge of the support-'- ing part. Y

'iie

2. A composite bladeconip'risinga cutterand a supporting part and means for fasten? ing said parts together, said cutter 1 being aflat platecomprisinga pair'of oppositely disposed aligned tongues on the rear edgethereof engaging over "the'rear edge lofth' supporting part.

3. compositeblade comprising a cutter aiid'a'supporti'ng part, and means forfastening said' parts together coinprising a groove in' the rear edge'bfithesupportingl part and a tongue on the rearedge of the cutter adapted it be received in thegroove from" the rear side of thesupportingpart i 4. A composite blade comprising a cutter and a supporting part, and neans for-fasten.- ing said parts together, said cutter being a flat plate and said fastening means comprisng oppositely disposed parts on the cutter at the rear edge thereof eXtending longitudinally with respect to the'cutter' and C11Sf posed in planes inclined to the planes of the faces of the cutter. a i y I 5. A composite blade comprising a cutter and a supporting part, and means for fastening said parts together, said cutter being a fiat plate and saidfastening means comprising a tongue and groove connection between said parts at the rear edges thereof, said to ngue and groove extending longitudinally or the blade.

6. A composite blade comprising a cutter and a supporting part, and-means for fastening said parts togeth r, saio cutter being a fiat plate andsaid fastening ineans comprising a tongue and groove connection between said parts at the rear edges thereof, said tongue extending longitudinally With respect to the cutter and having its free end bent to incline it angularly With respect to the cutter. v

7. A composite blade comprising a cutter and a supporting part, and means for fastening said parts together, said cutter being a flat plate and said fastening means comprising parts on the cutter at the rear edge there-' of extending longitudinally with respect top the cutter disposed in planes inclined to the planes of the faces of the cutter, and a recess in therear of said supporting part adapted to receive, from the rear of said part the inclined parts on the cutter.

8. A composite blade comprising a cutter, and a supporting part, having a longitudinal recess onits inner face into Which said cutter is adapted to fit,a shoulder on the supporting part at the rear ofthe recess for supporting said cutter opposite its cutting.

edge, a groove in said shoulder having a depth corresponding to the thickness of the cutter, a second groove in the rear of the supporting part communicating with the first groove and a tongue onthe cutter adapted to fit in said grooves.

9. A composite blade comprising a cutter,

and a supporting part having a longitudinal recess on its inner face into Which said out ter is adaptedto fit, a shoulder on the sup-i porting part at the rearof the recess for supporting said cutter opposite its cutting edge, means for fasteningsaid partstogether comprising a tongue and groove connection 7 near the outer end ofth'e blade, said tongue 7 being formed on the'rear edge of the cutter and engaging in a groove in the rear of the supporting part, said tongue being resilient and adapted to co-act With the all of said groove to urge the face of the cutter to lie fiat Within its recess.

10. A cornposite blade comprisinga cutter, and a supporting part having a longitudinal recess on its inner face into which said cutter is adapted to fit, a shoulder on the support ing part at the rear of the recess for supporting said cutter opposite its cutting edge, means for fastening said parts together comprising a pair of oppositely disposed aligned tongues at the rear edge of the cutter near the outer end of the blade, said tongues having their free ends incl ned to the planes of the faces of the cutter, and a groove inotlie.

ISAAC PATRICK.

Images