US2737718A - Scissors - Google Patents

Description

March 13, 1956 MAUNU 2,737,718

SCISSORS Filed Jan. 17, 1955 Hugo l Maunu INVENTOR.

United States Patent SCISSORS Hugo I. Maunu, Palo, Minn. Application January 17, 1955, Serial No. 482,178

Claims. 01. 30-226) The present invention relates to new and useful improvements in scissors and has for its primary object to provide, in a manner as hereinafter set forth, a device of this character which is adapted to be used either for straight cutting or pinking. I

Another very important object of the invention is to provide, in a pair of scissors of the aforementioned character comprising pivotally connected straight cutting, pinking and combinations blades, novel means for selectively lockingtlie latter to either'ofthe first two named blades for actuation thereby for coaction with the other of said first two named blades.

Other objects of the invention are to provide a combination scissors of the aforementioned character which will be comparatively simple in construction, strong, durable, compact, light in weight and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawing wherein like characters of reference designate corresponding parts throughout the several views, and wherein:

Figure 1 is a view in side elevation of a pair of scissors constructed in accordance with the present invention; showing the combined straight cutting and pinking blade in neutral or inoperative position;

Figure 2 is a side elevational view, showing the blades v set or adjusted for straight cutting;

Figure 3 is a side elevational view, showing the blades straight cutting and pinking blade;

Figure 6 is a detail view in perspective of the blade loclt or latch;

Figure 7 is a cross sectional view, taken substantially.- I

on the line 77 of Figure 3; and

Figure 8 is a cross sectional view, taken substantially on the line 8-8 of Figure 2.

Referring now to the drawing in detail, it will be seen that the embodiment of the invention which has been illustrated comprises a pair of blades 10 and 11 of suitable metal which are pivotally connected at one end, as at 12. The blades 10 and 11 comprise, respectively, on their pivoted ends, integral operating handles or levers l3 and 14.

The blade 10 includes a straight cutting edge 15. As illustrated to advantage in Figure 1 of the drawing, the blade 11 comprises a conventional pinking edge 16. The blade 11 further includes, on its back portion, an inwardly projecting stop flange 17, the purpose of which will be presently set forth.

The pivotal connection 12 of the blades 10 and 11 is in the form of a countersunk screw or bolt having threaded on one end portion thereof a retaining nut 18. A coil ICC spring 19 (see Figure 4) is mounted on the pivot screw 12 between the nut' 18 and the adjacent blade for yieldingly urging the blades toward each other.

Also having one end portion journaled on the pivot screw 12, between the blades 10 and 11, is a combined straight cutting and pinking blade 20. The blade 20 comprises a straight cutting edge' 21 for coaction with the straight cutting edge 15 of the blade 10. The blade 20 further comprises a conventional pinking edge 22 for coaction with the pinking edge 16 of the blade 11. This edge 22 of the blade 20 further includes an oppositely projecting, lateral stop flange 23 which is engageable with the straight cutting edge 15 of the blade 10 when the device is set for pinking, and engageable with stop flange 17 when set for cutting. l I

The pivoted end portion of the blade 20 has formed therein a substantially T-shaped slot 24 for registryof the stemthereof with notches 25 and 26 in the'corresponding portions of the blades 10 and 11, respectively. Journaled forlateral swinging movement in opposite directions in the slot 24 between the blades 10 and 11 and frictionally engaged with said blades is a latch 27 comprising a bar 29. The bar 29 of latch 27 is 'engageable in eitherof the notches 25 or 26 for selectively locking the blade ZQyto the blades 10 ;and f11 for'operation in unison therewith. The latch 27 further comprises a substantially segmental head 28 on one end of the bar 29, said head being substantially in the form of a cam and including a flat 30 for abutting engagement with the inner faces or sides of the blades 10 and 11 when said latch is in either of its operative or locking positions. The head or cam 28 of the latch 27 is journaled in the inner or head portion of the substantially T-shaped slot 24 and the bar 29 is operable through the stem portion of said slot for engagement in the notches 25 and 26. The bar 29 includes an enlarged, substantially triangular outer or free end portion 31.

It is thought that the operation or use of the scissors will be readily apparent from a consideration of the foregoing. Briefly, when the scissors are to be used for straight cutting, the blade 20 is positioned in parallelism with the blade 11 in abutting engagement with the flange 17 and locked thereto by engaging the latch 27 in the notch 26. Thus, when the blades 10 and 11 are actuated, the straight cutting edge 21 of the blade 20 coacts with the straight cutting edge 15 of the blade 10 in an obvious manner. When it is desired to use the device for pinking, the latch 27 is swung to intermediate or inoperative position, as shown in full lines in Figure 4 of the drawing. In this manner, the blade 20 is released from the blade 11. The blade 20 is then swung into parallelism with the blade 10 with the flange 23 abutting the cutting edge 15 of said blade 10. The latch 27 is then swung into the notch 25 for locking the blade 20 to the blade 10 for operation in unison therewith. Then, when the blades are actuated through the medium of the handles 13 and 14, the pinking edge 22 of the blade 20 coacts with the pinking edge 16 of the blade 11. The cam or head 28 of the latch 27 is of a slightly greater diameter than the distance between the yieldingly connected blades 10 and 11. Thus, when the latch 27 is engaged in either of the notches 25 and 26 of the blades 10 and 11, respectively, the flat 30 abuts the opposed face of the other blade for retaining said latch in its set position.

It is believed that the many advantages of a pair of scissors constructed in accordance with the present invention will be readily understood and although a preferred embodiment of the device is as illustrated and described, it is to be understood that changes in the details of construction may be resorted to which will fall within the scope of the invention as claimed.

What is claimed is:

l. A pair of scissors of the character described comprising: a straight cutting blade, at pinking blade, and a combined straight cutting and pinking blade pivotally connected at one end, means for selectively locking the combined blade to either of the first two named blades for operation in unison therewith and for coaction with the other of said first two named blades, and means for actuating the blades.

2. A pair of scissors of the character described comprising: a straight cutting blade, 21 pinking blade, and a combined straight cutting and pinking blade pivotally connected at one end, means for selectively locking the combined blade to either of the first two named blades for operation in unison therewith and for coaction with the other of said first two named blades, and means for actuating the blades, said first two named blades having notches in the pivoted end portions thereof, and a latch pivotally mounted on the pivoted end portion of the combined blade and engageable selectively in the notches.

3. A pair of scissors comprising: a straight cutting blade, a pinking blade, a pivot connecting said blades at one end, a combined pinking and straight cutting blade journaled on the pivot between the first and second named blades, and means for releasably locking the third named blade to either of the first two named blades for coaction with the other of said first two named blades.

4. A pair of scissors comprising: a straight cutting blade, a pinking blade, a pivot connecting said blades at one end, a combined pinking and straight cutting blade journaled on the pivot between the first and second named blades, and means for releasably locking the third named blade to either of the first two named blades for coaction with the other of said first two named blades, the straight cutting blade and the pinking blade having notches in the pivoted end portions thereof, said means including a latch pivotally mounted for swinging movement on the pivoted end portion of the combined pinking and straight cutting blade and engageable selectively in the notches.

5. A pair of scissors comprising: a pair of blades pivotally connected at one end, a third blade mounted between said pair of blades and pivotally connected thereto at one end, said third blade having a substantially T-shaped slot in its pivoted end portion, said pair of blades having notches in the pivoted end portions thereof, and a substantially T-shaped latch journaled in the slot and engageable selectively in the notches for locking the third blade to either of said pair of blades for operation in unison therewith.

References Cited in the file of this patent FOREIGN PATENTS 7,766 Great Britain Mar. 31, 1898

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