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Патент USA US2403623

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July 9, 1946-
~ F. c. WALLACE
2,403,623
CLAMP OPERATING' TOOL
Filed June 26, 1944
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INVENTOR.
C’.. LL/ :L_/.fa c' E
BY
f
2,403,623
Patented July 9,1946
’l UNITED STATES PATEN T
OFFICE
2,403,623 f
CLAMP OPERATING TOOL
Frank C. Wallace, North Hollywood, Calif., as
ysignor to HermanA H. ‘Helbush, Los Angeles,
Calif.
Application June 26, 1944, serial iva-542,190
4 Claims. (Cl. 29e-270)
1
My present invention has to do with improve-`
ments in clamp holding and operating tools and,
while it is adaptable for other uses, it is designed
primarily for the purpose of holding spring
actuated sheet metal fasteners or clamps while
compressing the spring which normally urges the
plunger of the clamp into retracted position.l For
instance, fasteners of this general >type are
shown in my Patents Nos. 2,266,929 and 2,271,879.
Several problems have presented themselves
in providing efficient tools for holding ‘ and
operating such clamps.
One of those problems
has been the fact that an operator must fre
quently use clamps of different sizes and lengths
and all the operating tools heretofore have been
suitable for only a single length of clamp, re
quiring that theV operator vcarry a plurality of
operating tools and changing from one to the
other as the different sized clamps are
encountered, all of which requires considerable
additional time and labor as well as'duplication
ofv equipment.
Another respect in which such clamp holding
and operating tools have been objectionable has
been their lack of any practical safety means for
`nation of - one of the practical embodiments
thereof. I wish it understood in this connection,
however, that the speciñc details of construction
which I shall now describe are merely illustrative
isince, with the understanding of the invention
to be had therefrom, various modifications within
the ‘broader scope of the invention as ldefined by
the claims will occur to those working in Vthis
art.
In connection with the following description I
shall refer to the accompanying drawing, in
which:
'
Fig. 1 is a side elevation with part of the
housing removed, the device being shown in
inoperative position;
Fig. 2 is a View like Fig. 1 except that the parts A
are shown in clamp operating position;
Fig. 3 is a section taken on line 3-3 of Fig. 2,'
Fig. 4 is a top plan View'. taken on line 4-4 of
Fig. 2, with parts broken away for illustrative
purposes;
Fig. 5 is a view similar to Fig. 4 but with no
parts being broken away;
~
Fig. 6 is a view similar to Fig. 1 but showing
i' thefclamp-receiving cradle in an adjusted posi
positively securing the fastener or clamp in the \
tion andA showing a clamp in position in the tool;
tool against accidental escape while the spring
of the clamp is being compressed. Such clamps
usually emp‘ioy a very strong spring which must
be .compressed in order to protract the clamping
element from the body of the clamp, and unless
the clamp is meticulously centered in the holding
tool, the clamp is apt to fly out laterally and
and
- strike and injure a workman.
Numerous very
~
Fig. ’7 is a section on line 'l-1 of> Fig. 5.
In the drawing I show at 5 a pistol-shaped
-housing or body comprised of a pair of oppo
sitely disposed channeled sides 5a,- 5bl secured
together by rivets 6. To facilitate assembly and
to strengthen the housing I provide a guide 1
comprised of a U-shaped or ychanneled member .
-~ whose bottom wallvla is spot Welded to the side
serious accidents have resulted from this short
member 5a and whose sides 1b extend above the
coming of prior tools.v
plane of the sides of the side member 5a, to ñt
It is among the objects of my present invention
between the sides of the side member 5b when
to provide a holding and operating tool of this
assembled.
.
character which may be quickly and simply ad
A channeled operating lever I0 is a fulcrumed
40
justed to take different sized fasteners.
between sides 5a, 5b by a cross pin II, the lower
It is another object to provide a tool of this
end Ilia` of the lever projecting out of the housing
character comprising a holding element and a
for manual manipulation. The upper or inner
plunger which are so operatively connected to an
end of the lever presents bifurcations I0b. One
actuating lever as to be simultaneously moved in
opposite directions, so that the fulcrum and 45 of the bifurcations has provided therethrough
a curved slot I2 for the purpose to be described,
consequently the manual effort necessary for
the side wallr of the slot providing a shoulder I2a.
operationfare reduced to a minimum.
A cradle member I5 ofr U-shaped cross section
Another lobject vis to provide a tool of this
is mounted in the housing to reciprocate through
character embodying novel and highly efliclent
safety means for retaining 'a fastener in operat 50 the end opening I6 provided by the left-hand end
of the housing, the inner or right-hand end Ilia
lng condition and against accidentalv escape from
of the cradle member having a longitudinal slot
the', tool.
I'I in its bottom wall to pass the bifurcations Illb,
Another ob'ject is the provision of a clamp
and said inner end provides a guideway for a
holding and operating tool which is extremely>
simple and efficient in construction and opera 55 plunger 20, which latter element is U-sliaped in
tion, .capable of economical manufacture and.
which has long life.
i,
plan section andr has secured to its end wall a y
clamp-engaging plunger element 2l which pro
jects axially of the cradle I5 to engage the spring
Still further features of novelty and advantage
pressed plunger P of a clamp A (see Fig. 6).
are provided byV my invention but those will be
The inner -ends of the lever bifurcations Iûb are
come obvious from the following detailed expla 60
2,403,623
3
pivotally connected to the plunger element 2| by
If it be desired to adjust the tool to receive a
means of a link 23 and cross pins 22.
A pair of depending ears 25 are provided on
short clamp, this may be accomplished by holding
the cradle member l 5 by being cut from the sides
the lever against movement and inverting the
tool while pushing inwardly on the outer end of
thereof and bent downwardly, and between those
the cradle member I5,
ears the outer end of a link 25 is pivotally con- ' ‘
of the link 26 to move along the slot I2 and engage
nected by a pin 21. The opposite or inner end of
link 2E carries a cross pin 28 which projects into
behind the shoulder l2a of the slot (see Fig. 6).
The spring 30 normally urges the parts into the
the slot l2, being adjustable therealong between
' inoperative position of Figs. 1 and 6, thus urging
the positions of Figs. 2 and 6. That is, for rela
tively long clamps A, the pin would be set to pull
against the left-hand end of the slot l2 (see Figs.
l and 2) and for relatively short clamps the
pin would pull against the other end oi the slot
the cradle member outwardly and causing the
This causes the pin 28
upper end of the lever to swing to the right, mov
ing the piston member 20 inwardly of the housing.
I claim:
1. A clamp-operatingr tool comprising a body,
(see Fig. 6), being prevented from accidentally 15 a telescopic member carried by the body, said
escaping from the latter position of adjustment
telescopic member consisting of a pair of ele
,
ments mounted for longitudinal movement in op
From the right-hand end of the cradle mem
posite directions _relative to each other, one of
ber l5 there is a depending arm 29 to the outer
said elements being trough-shaped to provide a
end of which a compression spring 30 Ais secured 20 U-shaped cradle presenting stop means -for sta
as by a loop, the opposite end of the spring be
tionarily retaining a clamp in position to be en
ing anchored to the side member 5a of the hous
gaged by the other element, means for simulta
ing by being looped through an eye 3l struck out
neously moving said elements in opposite direc
of the material of the side member.
tions, said means including a lever, and means
The top portions of the side members 5a, 5b 25 fulcruming the lever between its ends in the body,
at their left-hand ends are cut away as shown at
said lever being operatively connected to one of
35 in Fig. 5 to permit a clamp A to be dropped into
the elements at one side of the fulcrum and oper
and removed from the cradle i5.
atively connected to the other element at the
To secure the clamp A against outward longi
other side of the fulcrum.
tudinal and upward lateral movement in the 80
2. A clamp-operating tool comprising a body,
cradle, I inwardly emboss in each of the opposite
a telescopic member carried by the body, said
'sides of the cradle member a stop element 4B,
telescopic member consisting of a pair of ele
which is in the shape of an inverted L (see Fig. 2) ,
ments mounted for longitudinal movement in op
the cradle member'being long enough that the
posite directions relative to each other, one of
distance between the inner end of the top por 35 said elements providing a cradle presenting
tion llûa of the stop element and the' outer end
means for stationarily retaining a clamp in posi
of the plunger iinger 2l is sufiicient to enable that
tion to be engaged by the other element, means
portion of the clamp A between its inner stop
for simultaneously moving said elements in op
shoulder S and the right-hand end of the fastener
posite directions, and means for longitudinally
plunger P to be dropped into the cradle through 40 adjusting one of said elements relative to the
the open top. After being thus dropped into the
other.
cradle, a slight tipping of the cradle or a slight
3. A clamp-operating tool comprising a body,
inward movement of the plunger finger 2l will
a lever, means pivotally fulcruxning the lever be
move the stop shoulder S of the clamp into en
tween its ends in the body, a cradle member re
gagement with the lower portion 49h of the Stop 45 ciprocally mounted in the body, a plunger mem
element andbeneath the portion 40a thereof, so
_ber carried by the body for movement axially
that the clamp cannot escape from the cradle
relative to the cradle member, means carried by
until again moved to the right to clear the stop
the cradle member to stationarily retain a clamp
element portion 40a.
in position to be engaged by the plunger member,
by the shoulder I2a.
, In operation, the parts of the tool are in the 50 said lever presenting a curved slot at one side
of the fulcrum, a link pivotally connected at one
position shown in Fig. l. First the clamp is
dropped into the cradle I5 through the housing
end to the cradle member, said link having a
lateral projection at its other end extending into
the housing and the lever lll and pressing them
said slot and being adjustable into positions en
together, the cradle member I5 and the plunger 55 gageable against either end of the slot, and means
member 2€) are caused to slide or telescope rela
operatively connecting the plunger member to
tive togeach other-that is, the cradle member
the lever at the other side of the fulcrum.
l5, by virtue of being connected to the lever below
4. A clamp-operating tool comprising a body,
the fulcrumed end il, is pulled inwardly, while
a lever pivotally secured to the body, a clamp
the plunger member 20, by virtue of being con 60 compressing member movably carried by the body,
nected to the lever above the fulcrumed end ll,
a clamp-retaining cradle longitudinally slidably
is pushed outwardly, so that the plunger P of
mounted in the body for movement relative to the
the clamp is forced into the body of the clamp
compressing member, and means for simulta
to protract the outer end W of the clamp from
neously moving said member and cradle relative
opening 35 and by grasping the handle portion of
the clamp body, compressing the clamp spring T.
During this movement the clamp cannot laterally
escape from the cradle since the sides and bot
tom of the latter prevent downward or sideways
escape and the overhan-ging portion 45a of the
stop element prevents upward escape. To re 70
lease the clamp the operation is in the reverse
direction.
to each other comprising link elements opera
tively connected at one end to the cradle and
clamp-compressing member, respectively, and ad
justably connected at their other ends to the
lever.
Y
FRANK C. WALLACE. l
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