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Патент USA US3052034

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Sept. 4, 1962
3,052,025
D. D. RING
TENSION ADJUSTER FOR CLIPPER HEADS
Filed June 25, 1961
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ary blade 12. The central portion 43 of the strap 26
is spaced from the stationary blade 12.
3,052,025
TENSION ADJUSTER FOR CLIPPER HEADS
Donald D. Ring, 315 E. 6th St., Grand Island, Nebl'.
Filed June 23, 1961, Ser. No. 119,081
6 (Ilaims. (Cl. 30—221)
The strap 26 has ears 44 on its ends which extend
inwardly over the movable blade 16, the ears extending
downwardly from the strap 26 at right angles thereto.
The foregoing structure forms no part of the present
invention except in combination therewith.
In accordance with the present invention, the ears 44
This invention relates to a novel adjuster for the springs
of heads of electric hair clippers.
are made to serve as supports for mounting means of
The primary object of the invention is the provision
of an adjuster of the kind indicated which enables ac
3,052,625
Patented Sept. 4, 1962
10
tension adjuster members 46, which comprise primary
nuts 48 which can be lateral lugs extending horizontally
from the outer sides of the cars 44, as shown in FIGURES
l, 2 and 3, provided with threaded bores 49 extending
fail to exert adequate tension on the movable blade of a
therethrough, and overlying the spring arms 36. Tension
clipper head, due to loss of tension by the spring, wear
of the movable and/or stationary blades, or reduction 15 adjusting means in the form of threaded adjuster mem
bers or screws 50, preferably having Allen type sockets
in thickness of the blades resulting from regrinding of
52, in their outer ends, are threaded through the bores
the blades.
49 and have rounded inner ends 54, which bear against
Another object of the invention is the provision of a
curate and balanced compensatory adjustments of the
tension of arms of clipper head springs where the springs
the undersides of the spring 36, at points intermediate
simple; e?icient, and easily used adjuster of the character
indicated above, which is adapted to be easily mounted 20 the ends thereof. Lock nuts 56 are threaded on the
screws 50, from their outer ends, and bear against the
on the stationary blade of a clipper head, as on the socket
lugs 48 so as to lock the screws 50‘ in adjusted position.
forming strap of an Oster type of clipper head, such as is
In use and operation, whenever the tension of the
disclosed in Patent No. 2,928,171 dated March 15, 1960'.
springs 34 on the movable blade 16, is insufficient for
A further object of the invention is the provision of an
adjuster of the character indicated above, which involves 25 proper cutting action, the lock nuts 56 are loosened and
the screws 50 turned, so as to push against the spring
tension adjusting screws, to bear on sides of the clipper
arms 36 and thereby increase the pressure of the head
head springs, which are individually and independently
30 of the spring 34 in the groove 28 of the movable
adjustable, and lockable, whereby the tension of the spring
blade 16. The screws 50 are turned in or out of the
can be accurately and evenly adjusted so as to eliminate
lug bores 4-9 until the bead 301' exerts uniform or balanced
unbalanced tension on the movable blade of a clipper
pressure, throughout its length, in the groove 28, whereat
head.
the lock nuts 56 are retightened to retain the adjusted po<
Other important objects and ‘advantageous features of
sitions of the screws 501 and thereby the adjusted tension
the invention will be apparent from the following descrip
tion and the- accompanying drawings, wherein, for pur
of the spring 34.
While there has been shown and described herein a pre
poses of illustration only, a speci?c form of the inven 35
ferred form of the invention, it is to be understood that
tion is set forth in detail.
the invention is not necessarily con?ned thereto, and that
In the drawings:
any change or changes in the structure of and in the
FIGURE 1 is a top plan view of a clipper head equipped
relative arrangements. of components thereof are contem
with a tension adjuster of the present invention;
4-0 plated as being within the scope of the invention as de?ned
FIGURE 2 is an end elevation thereof;
by the claims appended hereto.
FIGURE 3 is an enlarged longitudinal section taken
What is claimed is:
on the line 3—3 of FIGURE 1; and
1. In an electric hair clipper head, a stationary blade,
FIGURE 4 is an enlarged transverse section taken on
a movable blade slidably engaged with one side of and
the line 4-—4 of FIGURE 1.
Referring in detail to the drawings, wherein like nu 45 reciprocable endwise relative to the stationary blade, a
spring ?xed to the stationary blade and having arms
merals designate like parts throughout the several views,
overlying the movable blade, and adjuster means movably
an electric hair clipper head 10 is shown, which com
mounted on the stationary blade and bearing against the
prises a lower stationary blade 12 having a longitudinal
spring arms.
channel 14, in its underside, along which slides an upper
2. In an electric hair clipper head, a stationary blade,
movable blade 16, which is narrower than the stationary 50
a movable blade slidably engaged with one side of and
blade 12. Midway between the ends the movable blade 16
reciprocable endwise relative to the stationary blade, a
is formed, in its edge 18, remote from its teeth 20, with
spring ?xed to the stationary blade and having arms
a notch which is composed of a relatively narrow parallel
overlying the movable blade, and adjuster means mounted
sided portion 22 and a wider ?ared portion 24. The
notch, with a socket-forming strap 26, on the upper side 55 on the stationary blade and bearing against the spring
arms comprising screw means threadedly carried by the
of the stationary blade 12, forms a socket for receiving
stationary
blade.
the oscillating drive tongue (not shown) of an electric
3. In an electric hair clipper head, a stationary blade,
clipper, whereby the movable blade 16 is reciprocated
a movable blade slidably engaged with one side of and
endwise relative to the stationary blade 12, in the opera
tion of the clipper.
60 reciprocable endwise relative to the stationary blade, a
spring ?xed to the stationary blade and having arms
overlying the movable blade, mounting means on said
stationary blade, and adjuster means mounted on the
mounting means and bearing against the spring arms, com
nylon bead 30 on the adjacent edge of the bight portion
prising threaded adjuster members carried by the mount
or cross member 32 of a U-shaped spring 34. The spring 65 ing means, and lock nut means on the threaded adjuster
34 has outwardly bowed arms 36, extending laterally from
members adapted to be tightened against the mounting
The outer side of the movable blade 16 is formed
with a longitudinal groove 28, located between the teeth
20 and the edge 18, in which is seated longitudinally a
the ends of the cross member 34, which are out of contact
with the movable blade 16. The spring arms 36 have
free end portions 38 which are secured by means of screws
means.
4. In combination, an electric hair clipper head com
70 prising a stationary blade having a toothed edge, a mova
40 passing therethrough and through end portions 42 of
ble blade slidably bearing against one side of the sta
tionary blade and having a toothed edge, said movable
the socket-forming strap 26 and threaded into the station
3,052,025
4
.
blade being narrower than the stationary blade and posi- V
adjuster members on said lugs bearing against the spring
tioned along the toothed edge of the stationary blade and
arms, said tension adjuster members comprising screws
spaced from the other edge of the stationary blade, the
other edge of the movable blade having a central notch,
threaded through said lugs and having inner ends bearing
against the spring arm at locations intermediate their
ends.
6. In combination, an electric hair clipper head com
a strap ?xed on said one side of the stationary blade
between the movable blade and the other edge of the
stationary blade and having a central portion facing said
prising a stationary blade having a toothed edge, a mova
notch to de?ne a socket for an actuator tongue, a U
ble blade slidably bearing against one side of the sta
shaped spring having a cross member disposed longitudi
tionary blade and having a toothed edge, said movable
nally of the movable blade and lateral arms on the ends 10 blade being narrower than the stationary blade and posi
tioned along the toothed edge of the stationary blade and
of the cross member, the spring legs being outwardly
bowed out of contact with the movable blade and having
spaced from the other edge of the stationary blade, the
free end portions, said free end portions being secured
other edge of the movable blade having a central notch,
to said one side of the stationary blade at the ends of
a strap ?xed on said one side of the stationary blade
the central portion of the strap, the outer side of the mova 15 between the movable blade and the other edge of the
stationary blade and having a central portion facing said
ble blade having a longitudinal groove in which the cross
member of the spring bears, outstanding ears on opposite
notch to de?ne a socket for an actuator tongue, a U
ends of said central portion, lateral lugs on said ears
shaped spring having a cross member disposed longitudi
overlying and spaced from the spring arms, and tension
nally of the movable blade and lateral arms on the ends
against the spring arms at locations intermediate their 20 of the cross member, the spring legs being outwardly
bowed out of contact with the movable blade and having
free end portions, said free end portions being secured
5. ‘In combination, an electric hair clipper head com
prising a stationary blade having a toothed edge, a mova
to said one side of the stationary blade at the ends of
ble blade slidably bearing against one side of the sta
the central portion of the strap, the outer side of the mova
tionary blade and having a toothed edge, said movable 25 ble blade having a longitudinal groove in which the cross
blade being narrower than the stationary blade and posi
member of the spring bears, outstanding ears on opposite
ends of said central portion, lateral lugs on said ears
tioned along the toothed edge of the stationary blade and
overlying'and spaced from the spring arms, and tension
spaced from the other edge of the stationary blade, the
adjuster members on said lugs bearing against the spring
other edge of the movable blade having a central notch,
a strap ?xed on said one side of the stationary blade 30 arms, said tension adjuster members comprising screws
threaded through said lugs and having inner ends bearing
between the movable blade and the other edge of the
stationary blade and having a central portion facing said
against the spring arms at locations intermediate their
notch to de?ne a socket for an actuator tongue, a U
ends, and lock nuts threaded on the outer ends of the
screws and bearing against the lugs.
shaped spring having a cross member disposed longitudi
arms.
'
nally of the movable blade and lateral arms on the ends 35
of the cross member, the spring legs being outwardly
bowed out of contact with the movable blade and having
free end portions, said free end portions being secured
to said one side of the stationary blade at the ends of
the central portion of the strap, the outer side of the mova 40
ble blade having a longitudinal groove in which the cross
member of the spring bears, outstanding ears on opposite
ends of said central portions, lateral lugs on said ears
overlying and spaced from the spring arms, and tension
References Qitezl in the ?le of this patent
UNITED STATES PATENTS
548,189
1,505,333
1,764,614
1,888,688
1,956,042
2,928,171
Gillette ______________ __ Oct. 22, 1895
Gray _______________ __ Aug. 19, 1924
Dremel ______________ __ June 17,
Oster ________________ __ Nov. 22,
Oster _______________ __ Apr. 24,
Oster ________________ _._ Mar. 15,
1930
1932
1934
19601
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