US 2199685 A
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Description (OCR text may contain errors)
y 7, 1940. w. A. WOOD 2,199,685
I TWEEZERS Filed April 27, 1937 I INVENTOR. WALTER A WOOD ATTORNEYS Patented May 7, 1940 UNITED STATES PATENT OFFICE The present invention relates to that type instrument knownas tweezers and more spe -cifically to tweezers having an automatic plucking action.
Among the objects of the invention is an instrument of the type indicated in which the gripping force of the jaws is maintained during the plucking movement.
Another object is a plucking device producing a lateral pull of the hair or other objectinstead of a pull normal to the surface.
Still another object is a device of the type indicated which provides for the distinctly separate actions of gripping and plucking in one 1 continuous and rapid movement of the fingers of the operator.
Other objects and advantages will be apparent to those skilled in the art upon reference to the following description and the accompanying drawing in which Figure 1 is a perspective view of the tweezers in ordinary open position.
Figure 2 is a similar view showing the position of the parts at the end of the plucking move- 5 ment.
Figure 3 is an elevational view of the tweezers showing the second position in dotted lines."
Figure 4 is a section on line 54 of Figure 3.
Figure 5 is an elevation of the gripping means.
As shown, the device comprises a jaw assembly or pincette ill (see Fig. 5), consisting of a strip of spring material having its ends ll formed into any desired shape, but preferably bluntly pointed as shown, and bent at its middle into a loop I2 to bring the ends together. Suitable means such as the small eyes l3 are also formed in the strip about midway between the loop I2 and points H.
The jaw assembly ismounted in a handle or operating member 20 also consisting of spring material. This member consists of a loop of flat stock having one end 2| turned inwardly and hinged as at 22 to one of the eyes l3, the hinge being arranged to prevent swinging of the jaw I assembly in the direction opposite to that indicated in Figure 3. The other end of loop 20 extends a little beyond end 2| and is formed into an eye 23 in which is enclosed one end of a wire link 24 whose other end connects with the other eye l3 on the jaw assembly.
In producing and assembling thedevice, the jaw assembly In is so treated that, when unrestrained, the points II are pressed together with suificient pressure to grip tightly an object to be plucked or held, and the loop handle 20 is so treated. that it tends to expand or open. These two elements are so adjusted andproportioned i that, when assembled, the'loop handle, by virtue of its expanding bias, opens the jaws of the jaw assembly to about theposition of Figures 1 and 3, against its closing bias. Further, the hinge 5 22 is so formed as to stop the element It parallel to the center line, While the eye 23 is slightly beyond a line extending through the two eyes 13 when the element I O'isin the full line position of Figure 3. 10 In the operation of the device it may be placed 7 adjacent, for example, a hair 30, with the latter between the points H. The initial pressure upon the arms or ends of the loop handle 20 allows the jaws II to close upon the hair. pressure upon the handle 20 then causes the link 24 to rotate the member 10 about the pintle of hinge 22 to the dottedline position of Figure 3, plucking the hair laterally.
Now having described the invention, and the 20' preferred embodiment thereof, it is to be understood that said invention is to be limited, not to the specific disclosure herein set forth, but only by the scope of the claims which follow:
What I claim is: 25 1. Tweezers comprising a closable handle biased to open position, a pincette assembly mounted therein including a pair of jaws biased to closed position, the bias of the handle being arranged in opposition to that of the jaws and 30 being suflicient to maintain the latter in open position. i
2. Tweezers consisting of a loop form handle of flat spring material having one of its ends 'turned inwardly and forming one member of a 5 hinge structure, a jaw assembly of loop form with its jaw forming ends extending outward of the handle and having one jaw hinged to said inturned end, and a link connecting the other end of said handle to the opposite jaw, said jaw 40 assembly being biased to closed position and said handle being biased to open position.
3. Tweezers consisting of a compressiblehandle assembly, a jaw member mounted for partial rotation therein, and means connecting a por- 45 tion of the handle member to said jaw assembly and arranged to partially rotatethe latter when said handle is compressed and return same when the pressure is relieved.
4. Tweezers consisting of a compressible handle assembly having two arms, a jaw member, rotatably mounted on one of said arms, and rotating means connecting said jaw assembly and the other of said arms.
a WAL'I'ER A. WOOD. 5