US1187394A - Hook-finishing machine. - Google Patents

Description

B. E. SAWYER.

HOOK FINISHING MACHINE.

APPLICATION FILED JULYIQ, ISIS.

1 ,1 87,394. Patented June 13, 1916.

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TMI COLUMBIA PLANOCIRAPH c B.v E. SAWYER.

HOOK FINISHING MACHINE.

APPLICATION FILED 1uLY19, 1915.

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BURNSIDE E. SAWYER, 0F FITGHBURG, MASSACHUSETTS.

HOOK-FINISHING- MACHINE.

Specification of Letters Patent.

Patented June 13, 1916.

Application filed July 19, 1915. Serial No. 40,585.

' To all whom it may concern:

Be it known that I, BURNsIDn E. Sawrnn, a citizen of the United States, residing at Fitchburg, in the county of \Vorcester and State of Massachusetts, have invented a new and useful Hook-Finishing Machine, of which the following is a specification.

This invention relates to a finishing machine, particularly designed for forming a tapered notch at the end of a crochet hook. The formation of this notch has been heretofore largely a hand operation, but by the use of my improved machine the hand operations are substantially eliminated.

It is the principal object of my invention to provide a hook finishing machine by which a hook and a rotating cutter may be given such relative movements that the notch formed by the cutter shall extend around substantially three sides of the hook, this form of notch being essential in this product.

With this object in view, one important feature of my invention relatesto the provision of a cylindrical work support for holding the hook in the desired angular position during the cutting or finishing operation.

Another feature of my invention relates to the provision of suitable devices for moving the work support angularly relatively to the cutter, thereby bringing different portions of the hook in position to be operated upon by the cutter.

Further features. of my invention relate to certain devices, arrangements, and combinations of parts which will be hereinafter de scribed and more particularly pointed out in the appended claims.

The preferred form of my invention is shown in the drawings, in which Figure 1 is a side elevation of the finishing machine; Fig. 2 is a front elevation thereof; Fig. 3 is an enlarged plan view of the work support and the rotating cutter, with their associated parts; Fig. 4c is an enlarged end elevation of a portion of the work support taken in the direction of the arrow 4- in Fig. 3; Fig. 5 is a front elevation of the work support, portions thereof being broken away, and the bearings thereof being indicated in dotted lines; Figs. 6 and 7 are plan view and side elevation of a blank suitable for forming a crochet hook, and Figs. 8 and 9 are a plan view and side elevation of the same blank after the finishing operation has been performed.

The machine comprises in its essential parts a cylindrical work support 10 and a rotating cutter 11, together with suitable supporting and actuating devices by which the work support and cutter may be given the necessary relative movements. The work support 10 is mounted in bearings 12 and 13 (Fig. 5) formed in a bracket or casting 14: (Fig. 1) which may be secured by bolts 15 to an angle plate 16.

The work support itself comprises two cylindrical bearing portions 17 and 18 (Fig. 5), the portion 17 having a pinion 19 formed thereon, which pinion is of slightly larger diameter than the portion 17, thus providing a shoulder 20 which prevents axial movement of the work support toward the left, as shown in Fig. 5. The bearing portion 18 is also formed in two diameters,'thus providing a shoulder 21 which prevents axial move ment of the work support in the opposite direction.

A segment gear 22 (Fig. 1) is pivotally mounted at 23 upon an upward extension of the bracket 14: and meshes with the pinion 19 previously described. The segment gear 22 is provided with an upwardly extending handle 24: by which it may be manually op erated, thereby giving the cylindrical work support a partial rotation in its bearings.

A pair of stops 25. and 26 secured to the outer face of the bracket l lengage projecting parts of the work support, thereby limiting its angular movement in both directions. The stop 25 is shown in operative engagement in Fig. 1 and the stop 26 is similarly engaged in Fig. 4. y

In order to yieldingly retain the work support in any angular position a block of friction material 27 (Fig. 4) is secured to the upper edge of the stop 25, being held in position by a clamping plate 28 andscrews 29. One end of the block 27 engages the outer end of the work support 10 with suflic'ient pressure to retain the work support yieldingly in any desired position.

Referring now to Figs. 3, 4t and 5, the work support 10 is provided with an opening 30 extending axially through the sup port. As shown in Fig. 4 this opening is formed as a longitudinal rectangular slot disposed radially along one diameter of the cylinder. A. hook rest 31 extends axially through this slot or opening,and is provided in its upper edge, with a suitable groove for receiving the hook blank. At its right hand in the desired positionyand manually operated means for giving the work support.

end, a stop 32 is provided for positioning the hook longitudinally.

The radial position of the rest 31 in the slot is determined by a radially adjustable.

- tion 17 of the work support 10 and the outer end of the hook rest 31 is secured by i a bolt-and-slot connection to the projection 35, by which means the hook rest is rigidly retained in any desired angular position. A clamping plate 36 extends axially through the opening or slot 30 above the rest 31, and isadapted to engage the upper side of aho'ok blank, positioned on the rest, thereby securing the blank within the groove in the upper face of the hook rest. The clamping device shown in the drawings comprises i a short shaftorstud 37 (Fig. 3)"rotatable in a middle portion 38 which connects the bearing portions of the Work support. The

shaft 37 is'provided With'acam 39 posito force the timed to engage the plate 36 g The shaft 37 same against the hook blank.

isalso provided with an extension 40 hav 'ing a squared end 41 to whlch a socket wrench 42 may be applied for turning the shaft.

The parts desired angular relation to'the axis of the work support, means for clamping the hook and hook a partial rotation. V I will now describe the arrangements for supporting and driving the cutter 11. The

cutter is mountedjupon'. one end of a short" horizontal shaft 43 (Fig. 3) rotatable in bearings 44-44 formed in the outwardly projecting arms of a vertical cutter slide 45. The slide 45' is movable in a dove-tailed guideway 46, vertical adjustment therein being secured by turning a handle 47 f mounted upon the upper end of a slide .screw 48 (Fig. 2). 1

The guideway 46 is formed in an up- 1wardly extending projection at the front end of a carriage 49 which is movable horizontally between] guides 50Ise'cured to a. base-plate 51. The plate 51 is provided p.150

with slots 52. upon its opposite edges through which bolts 53 extend into an extension. of the angle plate 16. By loosening these bolts the angular positionof the carriage may be. varied relatively to the axis or the work support. its rear end thus far; described provide means for supporting a hook blank in any support. through j approximately the carriage 49 is provided with a downwardly extending arm 54 (Fig. 1) having a slot-and-pin connection with an upwardly extending arm 55 forming one portion of a bell-crank pivoted to a fixed support at 56. The horizontal arm 57 of the bellcrank is connected by a rod 58 to a treadle 59 pivoted to the floor at 60.

The machine is shown herein as mounted upon the bed 61 of a work bench62. A coiledspring 63 is connected atits upper endto the bed 61 and at its lower end to the arm 57 the spring acting to raise the arm 57 thus moving the carriage 49 to the rear. 1

stop-plate 64 is adjustably secured to thecarriage 49 by bolts 65 and limits the for ward'movement of the carriage.

The cutter shaft 43 may be driven in any convenient manner and I have herein shown the shaft as provided with a pulley 66 which is connected by abelt 67- to a motor 68' mounted above the machine. This motor may be controlled by opening and closing the circuit (39 by means of a knife switch 70 operated by a depending rod or arm 71. Any othersuitable control mechanism may be substituted if desired.

Having described the details of the mechanism I will now explain the operation of the machine. The hook blanks as brought to the machinehave the form shown in Figs. 6 and 7 two parallel sides of the blank being slabbed off for a certain distance from one end (Fig. 6) and'the two remaining sides having the corners rounded off as shown in Fig. 7. The blank thus prepared is placed upon thefhook rest of the work support as shown in Figs. 4 and 5 and is secured therein by turning the shaft 37 and the cam 39 to force theclainp 36 downwardly against the upper side of the hook. The treadle 59 is then pressed downwardly, moving the carriage 49 forwardly and bringing the cutter 11' into position to cut a tapered notch into oneside of the blank. \Vhile the cutter remai'nsi'n its forwar'd poa sition the segment gear 22 is turned by 7 means of the handle 24, revolving the work fourths of a revolution. and. thus presenting three sides'of the blank. to-theaction of the cutter. After the cutting operation is completed the tr'eadle 59' is released. and the spring 63 returns the carriage 49 to its rearward position. At the same time the handle 24 is swung upwardly turning the work support lO to its normal position. The form of'tlie hook, after the cutting or finishing operation is completed is shown in plan and elevation in Figs. 8 and '9';

Itwill be notedthat the work support 10 revolves infixed bearings, whereas both the threevertical and horizontal-position of the cutter shaft 43 as well as its angular relation to the work support 10 may be adjusted as desired.

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Furthermore, the angular relation of the hook rest 31 with reference to the work support may be varied by means of the adjusting screw 33 and the bolt-and-slot connection to the projection 35. The several adjustments described provide for variations in the depth and inclination of the notch for different sizes and styles of hooks.

Having thus described my invention it will be evident that changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope thereof as set forth in the claims,

and that the invention can be used for finishing other articles than the one mentioned, and I do not wish to be otherwise limited to the details herein disclosed, but

WVhat I do claim is 1. A finishing machine having, in combination, a cylindrical work support, a work rest extending longitudinally through an axial opening in said support, means for securing said rest in adjusted angular position in said support, means for clamping the work in position on said rest, a rotarycutter, a stand therefor, guideways for said stand, means for advancing said cutter and stand along said guideways to operative position adjacent to said work, and manually operated means for partially rotating said cylindrical support while said cutter is in operative position.

2. A hook finishing machine having, in combination, a cylindrical work support, a hook rest extending through an axial opening in said support, means for securing said rest in adjusted angular position in said support, means for clamping the hook in position on said rest, a rotary cutter, means for advancing said cutter to operative position adjacent to said hook, manually operated means for partially rotating said cylindrical support while'said cutter is in operative position, and a pair of oppositely disposed stops effective to limit the angular movement of the work support in both directions.

3. A hook finishing machine having in combination a cylindrical work support, a hook rest extending through an axial opening in said support, means for securing said rest in adjusted angular position in said support, means for clamping the hook in position on said rest, a rotary cutter, means for advancing said cutter to operative position adjacent to said hook, manually operated means for partially rotating said cylindrical support while said cutter is in operative position, and a pair of oppositely disposed stops effective to limit the angular movement of the work support in both directions, one of said stops having a frictiondevice mounted thereon and engaging the outer end of.

the work support to yieldingly retard the angular movement thereof.

4:. In a hook finishing machine a cylindrical work support having an axial opening therethrough, a hook rest extending through said support, a screw adjustable radially in combination, a support for a hook blank ro-' tatable in fixed bearings, manually operated means to partially rotate said support, a rotary cutter and shaft, bearings for said shaft, adjustable vertically and angularly relatively to said support, means to secure said hearings in adjusted position, means to advance said cutter in a predetermined horizontal path to operative position, and means to rotate said cutter.

6. A hook finishing machine having in combination a rotatable Work support, means to position and secure a hook blank in said support at any desired angle to the axis thereof, manually operated means eifective to give said support a partial rotation, a rotary cutter, a stand for said cutter, guideways along which said stand is movable in a predetermined straight path, means to withdraw said cutter and stand normally to a position removed from said hook blank, means to advance said cutter and stand along said guide-ways toward the blank, and an adjustable stop to limit the latter movement.

7. A hook finishing machine having, in combination, a rotatable work support, means to position and secure a hook blank in said support at any desired angle to the axis thereof, manually operated means effective to give said support a partial rotation, a rotary cutter and a shaft, bearings for said shaft formed on a vertical slide, means to move said slide vertically, a carriage supporting said slide, manually operated means to move said carriage forward, and additional means to return said carriage to rearward position, said carriage being also adjustable angular-1y in a horizontal plane.

In testimony whereof I have hereunto set my hand.

BURNSIDE E. SAWYER.

Copies of thin patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G."

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