US2250589A - Cutting device - Google Patents

Description

July 29, 1941- D. J. Lo PICCOLO CUTTING DEVICE Filed Oct. 16. 1939 INVENTOR D0 cl logllmh &

ATTORNEY Patented July 29, 1941 This invention relates to cutting: devices, and Y has particular although not exclusivev applicability to. electrically operateddevices for .cutting and .trimming loose threads on seamsof a gar- 'ment during the finishing process thereof.

In the manufacture of various types of garments, certain trimming andfinishing operations are very frequently left tospecial operators who remove all loose hanging threads and straighten out seamed edges by the use of conventional shears; and :due to the. 'fact that. considerable caution must be exercisednot to damage the garment during this process, this operationisoften both time-consuming and expensive;v It is hence one ofthe objects of my invention to facilitate this operation by providing an electrically 0perated device, readily controlled by hand, for quickly and cleanly performing the necessary finishing steps without the danger of-dam a ge to the garment l It is also within the contemplation of my invention to enable the above -referred-to opera- 7 time to be performed without danger of injury to the operator. v 1 g 1 I And it is further within the contemplation of my invention to enable certain forms and modifications thereof to Joe conveniently employed, not only as a finishing implementasaforesaid, but also" for the cutting of patterns outiof p'aper or cloth, the trimming of sections offurp for hair cutting and other cutting r name Other objects, "features and advantages will appear from" the drawing and the description hereinafter givenfl q I g Referring tothe drawing, V M V Figure 1 is a perspective view of th; Quttingdeviceconstituting my invention, shown connected by a flexible cable to a suitably suspended motor.

Figure'2 is a longitudinal section of my invention showing a portionof the actuating means in relation to the movable blade member, this sec-- 7 tion being taken substantially along line 2'2 of Figure 3.

Figure 3 is a section of Figure Ztaken substantially along line 3--3 of Figure 2. g

Figure 4 is a fragmentary plan view of the movable blade member and eccentric actuating means therefor. v

Figure 5 is a fragmentary longitudinal section substantially similar to that of Figure 2, showing a modification of my invention.

Figure 6 is an enlarged-fragmentaryplan view of the movable blade member and eccentric actuating means of the structure of Figure 5.

Figure?- is a fragmentary elevation showing a method of employing th device of either Figures 2 or 5 for cutting a pattern. 7 Figure 8 is a fragmentary elevation of another modification of my invention showing bent cutmember is! and-the casing H].

ting elements suchyas are adapted for cutting hair, and fur, and:-

.Figure 9,. is a fragmentary plan View of the device of Figure -8.

Q In the drawing, the 'body portionqlfl comprises a hollow casing. shaped to renderfit convenient for manual grasping,lthe interior of ,said'casing containing portions of the actuating mechanism to be hereinafter described. Y .Immovablyattached to the; forward portion of; casing l0 isthe combination. guide and blade member [L -the attachment; being preferably j effected through the medium of 'screw' means 12 extending through Member H'fconsists of a stationary blade member [3 and a guard member M in spaced relation theret said-guard andblade membershaving a common juncture The apparatus is providednwith' a'. movable blade member 1.5,.preferably pivotally mounted upon the casing .IO by'meansof pin 16' extending through the hole at IT. in member lTl. tMounte'd over said pinit is. the helical spring 1.8 normally urging the movable cutting member .I 5 into abutment with member] I; f 1 In theformillustratediin Figures 2;and 3;.the

:innermos't termi'nal. portion :19 of said movable 7 member -I 5fis bifurcated,:a block-2E! being slidably positionedwithin: the slot.2 I; thereof.Rotative1y positioned within-the :hole..22:in-.the blockiis the eccentric 23;forming part of :the eccentric shaft 24 vupon;Whizzhltlue gearlfiiisimounted andlimmovab-ly aiiixed. The pins 26 extending-from oppositeside's' ofshaft 24 are rotatively mounted Withinthe body of the casing as indic'ate'd. '-In operative. engagement with gear. 25 is'the1wor m :21 mounted on the worm shaft 'z flf'connected by suitable coupling meansat 2 9V to a flexible shaft 3fli.shown in the preformed form illustrated" as .being contained 'withinfthe flexible tubin'g all. e The said flexible shaft 39 operati-velyconhected to the motor 32,. l I

In the preferredform of this invention, the edges 33 and 34 of the movable and stationary blade members, respectively, are in intersecting "relation, leaving the forward portions of said edges diverging outwardly. The cutting portions of-the coactingb-lade members l3 and I5 do not extend to the foremost tips of their respective members, but begin at a. point short of the forwardterminals of said members, such. as a point at 35, and extend rearwardly therefrom. The

proportions of the blade members and thelrel'ative movement of the movable bladeinember I51 p over stationarymember 13 are such that the c0,- 7

actingfcutting portions of a members 13 and '15 never' extend forwardly beyond said "point 35,.

therebyalways leaving a gap 36 for receiving and supporting threads and other materials to be cut, as will clearly hereinafter appear. It willf cutting movement of member 4|.

tends further forwardly than movable member I5 and is in underlying relation with respect 7 thereto,thereby providing a protective means therefor.

In the operation of this device, the operative rotation of the worm shaft 28 is transmitted through worm 2'! and gear to eccentric shaft 24. within the block 20 causes a reciprocating movement of said block and a consequent rocking movement of the movable blade member l5 about its pivot I1. It is of course understood that in the practical application of this apparatus the speed of rotation of shaft 28, through the medium of flexible shaft 34 and motor 32, will cause rapid pivotal oscillations of the movable blade member l5 across the coacting stationary blade member l3. In this manner any thread or other material positioned between said cutting portions of the blade members will be subjected to the cutting action thereof.

As previously indicated, the cutting portions of the said blade members extend rearwardly from point 35, at all times leaving a space 36 in advance thereof. This will permit a thread or material which is to be cut to be operatively received and held between" the stationary blade 13 and the guard member l4 and movable blade 15, thereby facilitating the cutting action. This completely eliminates'the danger of repelling the material to be out before it reaches the cutting portion. Such a danger would be particularly present if the cutting portions extended to the very terminals of the blade members, especially where fine and light material such as fibres,

threads and hair are to be cut.

If upstanding threads or hairs are to be'cut, the lowermost surfaces 3'! of members l3 and I4 may be placed flush upon the material from 1" which such threads or hairs extend-the guard member and the position of the cutting edges rendering the material safe against accidental -mutilation. Should it be desired to obtain a closer cutting action, the upper surfaces 38 of the-blade members l3 and I5 can be placed contiguous to the material from which the threads or hairs'extend. I

In Figure 5 is shown a modification of my invention-in which the stationary blade member 39 and guard member 40 are substantially in one plane, the pivotally mounted movable member 4| being coactively disposed with respect to stationary blade member 39, substantially similar to the structure hereinaboveset forth. However,

The resultant rotation of the eccentric 23 trio 46 will not only cause a pivotal oscillation of themovable blade member 4|, but also a slight longitudinal movement rearwardly during the This is obviously due to the lateral and rearward thrust of eccentric 46. The block 43 permits the said pivotal and longitudinal movements inasmuch as it is, as aforesaid, rotatively mounted on pin 44 and in slidable engagement with the walls of slot 42.

Due to the simultaneous cutting and rearward movement of the blade member 4| the material will be drawn slightly rearwardly, preventing the usual folding or gathering of material as it is .tion illustrated in Figure 5 is preferred therefor.

Figures 8 and 9 show the movable blade member 52 and the combination blade and guard member 53 bent out of the plane of the longitudinal axis of the casing 54, the arrangement being adapted to facilitate the cutting of threads, hairs, fibres and the like.

It is of course understood that the various embodiments above-described and shown in the drawing are illustrative of my invention and not employed by way of limitation, inasmuch as numerous changes and modifications may be made within the scope of the appended claims without departing from the spirit of this invention. 1

What I claim is: v

1. A cutting device of the class described comprising a hollow casing adapted for manual grasping, a stationary blade member affixed to the casing, acooperable movable blade member, a pivotal mounting for the movable member associated with the casing, said movable member containing a slotted portion' adjacent said mounting, a guiding block rotatably mounted over said pivotal mounting and in slidable engagement with said slotted portion, an eccentric shaft extending transversely with respect to said movable blade and rotatably mounted upon the walls of said casing, an eccentric on said shaft rotatably. engageable with .said movable member for imparting thereto a rockingmovement and a longitudinal sliding movement with respect to said block, and driving means operatively associated with said eccentric shaft.

2. A cutting device of the class described comprising a hollow casing adapted for manual grasping, a stationary blade member afiiXed to the casing, a cooperable movable blade member, a pivotal mounting for the movable member associated with the casing, said movable member containing a laterally enclosed slottedportion intermediate the ends of the member, a" guiding block within said slotted portion and rotatably mounted over said pivotal mounting, said block being in slidable engagement with said slotted portion, an eccentric shaft extending transversely with respect to said movable blade and rotatably mounted upon the walls of said casing, an eccentric on said shaft rotatably engageable with the rear portion of said movable member for imparting thereto a-rocking movement and a longitudinal sliding movement-withrespect to said block, and driving meansfoperatively associated with said eccentric shaft; 1

DOM INIC J LO PICCOLO. Y

Images