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Патент USA US2412255

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Dec. 10, 1946.
i
G, M_ FERGUSON
VTwEEzERs
Filed Oct. 20, l1944
2,412,255
Patented Dec. 1o, 1946
2,412,255
UNITED STATES PATENT ori-‘ICE
2,412,255`
TWEEZERS
George M. Ferguson, Portland, Oreg.
Application October 20, 1944, Serial No. 559,565
a claims. (c1. :s1-4s)`
2
This invention relates generally to tweezers,
and particularly to a pair of tweezers of the
pincers type.
`
The main object of this invention is to pro-4
vide an inexpensive and efficient form of tweezer
in which the points will be held in alignment- and
prevented from opening under excessive pres
I 8 are inserted in the resilient member 20, which '
is preferably made of rubber or itseequivalent,
and thediscs 20 are put into place and riveted
and the device is ready for use. It will be noted
that when pressure is applied to urge the points
I2 together, it compresses the material 23 of the
bushing I5 between the portions I3 and stretches
the material of the members I5 on the opposite
The second object is to construct a pair of
side of the rivet I 8. The exact position of the
tweezers of the class described which Will be 10 pivots I4 with relation to the center line of the
rivet I8 will be determined by the resiliency of
easy to manufacture, convenient to hold in the
hand, and not easily rendered inoperative.
the member I5, the strength of the members IIJ
These and other objects Will beco-me more ap
and the character of the service for which the
parent in the specification as illustrated in the
device is intended.
accompanying drawing, in which
It can be seen from the foregoing that while l
15
Fig. 1 is a plan of the device.
there is provided an ideal pivotal condition, there
Fig. 2 is a side elevation.
is also obtained the very desirable result of having
Fig. 3 is an enlarged side elevation showing
the points I2 held in perfect register by means
the pivot end of the device.
of the side discs 20, which are‘in close contact
Fig. 4 is a view similar to Fig. 3, bu-t showing 20 with the side edges 24 of the members I3.
the side disc removed.
While I have referred to the member I5 as
Fig. 5 is a transverse section taken along the
resilient and it is preferable that it should be
line 5-5 in Fig. 3.
so, it will be apparent that it could be of hard
Fig. 6 is a fragmentary plan of the pivot end
rubber or metal, inwhich case reliance is placed
- of one of the tweezer blades.
25 upon the members I0 for resiliency without de
Fig. '7 is a perspective View of the completed
parting from the spirit of this invention.
instrument.
While I have thus illustrated and described my
Similar numerals refer to similar parts
invention, it is not my desire to be limited to the
throughout the several views.
precise form shown herein, and I intend to cover
Referring in detail to the drawing, there is 30 ysuch forms and modifications of the invention
shown, by way of example only, a pair of tweezer
as fall fairly within the appended claims.
arms I0, preferably widened at the intermediate
I claim:
points I I where power is applied, and of suflicient
1. In a device of the class described, a combi
thickness to avoid the necessity of reforming the
nation of a cylindrical rubber insert having a
cross section, to avoid separation of the points
pair of parallel longitudinal slots formed in one
I2 when a considerable amount of pressure is'
side thereof on opposite sides of its center, a
tweezer arm occupying each of said slots and
applied to the device. Obviously, the members
sures.
I0 should be made of a high grade tempered '
having outwardly extending pivot pins between
steel. The ends I3 are somewhat narrower than
the intermediate `point Il, and whereas they are
the arm ends projecting beyond the endmost
commonly joined by riveting or welding, I prefer,
>end. of said insert having openings therein for
in this instance, to unite them by means of a
the reception of said pivots, and a rivet passing _
j through said discs and through said insert~
novel construction which will provide the utmost
flexibility for the arms I0, accuracy of alignment
and ease of manufacture.
limits of the rubber insert, a disc disposed at each -
2. The device as described in claim 1, char
acterized by having said discs and insert of the
same diameter, said diameter exceeding the out
ermost spacing of the adjacent ends of said
I accomplish this by forming on the ends I3,
the pivot points I4, which may be square or
rounded as desired. The portions I3 of the
tweezer arms.
3. A device of the class described, consisting
arms I0 are preferably straight, as illustrated,
and are held in spaced relationship by the resil 50 of a pair of spaced discs, a cylindrical rubber
ient cylindrical member I5 provided with slots
insert disposed between said discs, said insert
having parallel slots formed therein opening on
I6, which receive the ends I3 and have a central
hole I 'I adapted to receive a rivet I8, whose re
the same side of said insert, tweezer arms having
duced ends I9 extend beyond the ends of the
their ends occupying said slots and having pivots
projecting therefrom between the arm ends an
member I5. At each end of the member I5 is
choring in said discs and a rivet extending.r
placed a side disc 20, provided with a counter
sunk opening :2| at the center thereof. and the f
through said discs and rubber insert adapted to
smaller openings 22 for the pivots I4 0f the
hold said discs against the sidesof said tweezer
members I 0.
arms.
GEORGE M. FERGUSON.
To assemble the device, the members I I) and 60
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