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Патент USA US2131821

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w
4, 193“
C. R. SCHLICHT
'
2,131.,21
SHEET METAL SEAMING TOOL
Filed Dec. 9, 1936
2 Sheets-Sheet l
w: 4, 193.&*
c. R SCHLICHT
2,13L1
SHEET METAL SEAMING TOOL
FilQd Dec. 9, 1936
2 Sheets-‘Sheet 2
29/
E 12,‘ r W
/
J/ 077.96%
" v ‘ Patented Oct. 4, 1938
'
2,131,821
UNITED :STATES PATENT OFFICE
’
7 2,131,821
SHEET METAL SEAMING TOOL
‘ Carl R. Schlicht, near La Crosse, Wis.
‘ Application December 9, 1936, Serial No. 114,984
‘
8 Claims.
(01. 113--56)
One of ‘the main objects of this invention is
to provide such a seaming tool which is simple
and economical in construction, and which is
w
comparatively easy to operate so as to conserve
" 5 ‘energy and will at the same time produce a ?rmly
clenched
seam.
'
r
A further object of this invention is to provide
a seaming ‘tool wherein the leverage of a chief
operating member, and thereby the force exerted
by the jaws on the seam, is gradually and auto
matically increased as the‘clenching operation
proceeds, so aslto produce a maximum of clench
ing pressure'at the ?nal part of each ‘clenching
,
‘ '
‘movement therebetween.
For the sake of econ
omy, these levers are made from suitable lengths
of ordinary strong metal pipes; and for the lever ,
connecting means I3 I preferably use a strong “ 5
leaf hinge, which includes a leaf l5 anda lead? It.
Said levers II and I2 are secured, respectively, to
the hinge leafs I5 and 16, preferably by welding
or securing the two levers in two openings provided in the hinge leaves[
The jaw members I‘! and H! of this tool-‘are
, ,
angle-shaped in cross-section, being substantially
in the form of angle‘plates, which comprise, re
spectively, the clenching jaw portions l1’ and I8’
step and provide a- ?rmly clenched seam.
“ll
‘
connecting them to provide pivotal or hinged
Another object of this invention is to provide ‘ serving as they active jaw portions engaging the "
‘
such a seaming tool wherein the two jaws, are
seam, and‘ the mounting’ angle portions I1’? and
differently arranged and are actuated to function ' l8" wherebythe jaw members are connected to
diiferently, so? that this tool is adapted for per
the two opposite hinge parts of hinge means It‘.
forming different bending operations by reversing
20 its positions on the seam.
‘
‘1
‘
‘ *‘Still' another object is to provide such an e?i
cient ‘seaming tool which is arranged so that it
‘can. be ‘economically ‘built by utilizingiseveral
‘standard and readily, obtainable‘members ‘for
providing several of its parts.’
>1
i i ‘
the hinge leaf l5, as by riveting it thereto, and
has its clenching portion l1’ dependingtherefrom;
connection with ‘the ‘ accompanying drawings
portion l8’ extending horizontally toward said
clenching portion l'l’,‘ adapted to be movable
ous other forms ‘and arrangements vmay be re
sorted to for carrying out the objects and pur
poses ‘of this invention‘.
In the‘ drawings:
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‘
‘
Fig. l is a top plan view of my novel seaming
tool illustrated in. its preferred form of construc
tion.
»
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‘
‘~
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‘Fig'. 2 is an elevational view of the tool in posi
1 ‘.40 tion on ‘a seam; ‘after’ completing the ?rst step of
the seaming operation.
Fig. 3 is a view‘similar to that ‘of Fig. 2, but
showing the tool in position on the seamv at the
beginning of the seaming operation. ,
‘45
ond step of the seaming operation.
-
Fig. 5 is a view similar to that shown in Fig. 4,
with the tool in said reversed position, and when
the'second'step of the seaming operation has been
completed.
‘
while the other jaw member l8 has its clenching
under hinge leaf I6‘, and it has its mounting por
tion‘ l8" provided-with means which connects it
slidably with the levers and'the hinge means.
In the form of construction shown in the
‘drawings the slidable mounting means for jaw
member l8 includes a pair of sleeves l9 secured
V on hinge leaf "3, and a pair'of shafts 20 secured
to angle portion I8", as by threading them there
in and, using locknuts 2| thereon. The shafts 20
are slidable in sleeves l9, and slidable movement 40
is thereby provided to jaw portion l8’ toward
and away from jaw portion l1’, to-and-fro under
neath hinge leaf “5.
.
Means is also provided herein for increasing th
Fig. 4 is an elevational view of the tool on'the
seam, but shown in its reversed position from that
shown in Fig. 2, and at the beginning of the sec
‘
other jaw member is slidably mounted on the de
vice to provide a sliding movement to it toward
and away from its companion jaw member. ‘In
this illustrated construction the jaw member I’!
has its mounting portion l1" secured underneath
These and various other objects and advantages
are attained with this invention, as will become
apparent from the following description taken‘ in
‘3'0 wherein the invention is shown‘ in its preferred
form of construction, it being apparent that vari
35
One ‘of these jaw members is ?xedly connected
to a‘hinge part and its associated lever, while the
r
My invention is illustrated in the‘ drawings in
its preferred form of construction. comprising a
pair of operating levers II and‘ I2 and means 13
clenching force of the levers upon the jaw mem
4:5
bers .during the seaming operation, and in the
form illustrated this means includes a collar 22
mounted slidably on lever H, and a pair of links
23 connected to the collar by pivot pins 24. A
clevis or yoke-shaped‘ member 25 is ‘secured to
angle portion l8", by bolts 26 or the~1ike, and
this member 25 is pivotally connected to the free
ends of said links 23, as by means of pivot pins
24'. extending outward from. the arms of the yoke
member, as best shown in Fig. 1. ‘
.
‘
55
2
2,131,821
In operating this seaming tool it is ?rst placed
as indicated in Fig. 3, so that the hinge means
rests upon the superposed ?anges or bent por
tions 2'! and 28 which have been previously pro
vided at the joining edge portions of the sheets of
metal 29 and 30 to be connected by the seam. The
jaw portion I8’ is placed at the outside of the
depending portion 28’ of the superposed portion
28; and the jaw portion I ‘l’ is placed to bear
10 against the opposite edge partof the superposed
portions 2"! and 28, to serve as the holding‘ jaw.
Then, upon moving lever ll away from lever 12,
the links 23 draw jaw member 18 forward and
and the ?rst said connecting means to mount
this jaw member for slidable movement toward
and away from said one jaw member, and means
operatively connected to the slidable jaw mem
ber and being connected with the said one lever
to have movement longitudinally thereof,
whereby the force applied thru the levers to the
jaw members is automatically increased during
the seaming operation.
2. A seaming tool comprising a pair of levers 10
and means connecting them for relative pivotal
movement, a pair of jaw members one of which
served as the active or clenching jaw during this
includes an attaching portion and a depending
jaw portion, means ?xedly connecting one of said
levers with the said attaching portion, the second 15
jaw member including an upper mounting por
tion and‘ a jaw portion extending therefrom to
ward said depending jaw portion, means con
?rst step, while the other jaw portion ll’ served
necting the said mounting portion operatively
as the holding jaw, and gradually swung down
ward against the upstanding‘ part _3-lv of the seam,
with the ?rst said connecting means to provide
said second jaw member with slidable movement
relative'to‘ the ?rst said connecting means, and
means operatively connected with the said mount
ing portion and with the said one lever to operate
force its jaw portion 98’ against the depending‘
15 portion 28’ to bend it underneath seam portion 22',
completing the ?rst step of theseaming opera
tion, as illustrated in Fig. 2. The‘ jaw portion I8"
as shown in Fig.32. Thus, when'slidable jawpor
tion 18' ?rst‘ bends the over-lapping portion 28’
inwardly around the outer edge of portion '21, the
25 heel. or angle part of jaw member I‘! bears against
said second jaw member,v thereby adapting the 25
the opposite edge part of the superposed portions
tool for different bending operations by revers
21 and 28, as shownin Fig. 3, and in the directly
ing it on the seam.
opposite direction to the pressure exerted by the
3. A- seaming' tool comprising a pair of levers
bending'upper edgerv part'of seam portion .28’,
and means connecting them for relative pivotal
30 where the holding effect of} jaw member ll is at
amaximum,
,
i
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_
:
.
_
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During the movement. of thevarious parts, in
performing this ?rst step of thelseaming opera-.
tion, the shafts 20 have slid further‘ into sleeves
i9; and at the sametimacollar 22 has slid down
ward on lever ‘I l, toward hinge leaf l5. vThus the
leverage of lever l I has been, gradually and auto
matically'increased during its operative move
ment away from lever 12, thereby likewise in
creasing the'force and. clenching e?ect of jaw !8"
upon the seam, and more particularly during the
?nal part of each seamingvstep and. at the time
when the greatest-clenching force is most valu
able, to produce a-tightlylclosed seam.
.
The tool is then reversed‘ in its position upon
the seam, for performing the next step of the
seaming operation, as shown in Fig. 4. The jaw
ing. one of them ?xedly with respect to one lever,
means for mounting the second jaw on said con
necting means to be slidable relative thereto and
to the second lever, and means connected with
said second jaw and including a member mounted 35
for longitudinal‘ slidable movement on the said
one lever, whereby the force applied thru the
levers to the jaws is automatically increased dur
ing thezseaming operation.
4. The subject matter set forth in claim 3, and
wherein the said one jaw has a depending plate
like jaw portion, and the second jaw has a plate
like lower jaw portion extending horizontally to
ward said depending jaw portion to move toward
it and away therefrom, thereby adapting the tool
for different bending operations by reversing it
on the seam.
portion l8’ then bears against the upstanding
5. A tool for seaming sheet metal, comprising
part 3| of the seam, and serves- as the holding
50 jaw; while the jaw portion ll’ bearson the-outer
a hinge of two pivotal portions, a lever secured
to each portion, a jaw ?rmly secured to one hinge
portion, a second jaw, means mounting it slid
ably on the'second hinge portion, and means con
edge of the overlapped and superposed, portions
28, 21 and 28', and‘ serves as-the active or'clench
ing jaw. Then, as the‘ tool is- actuated by swinging
lever H away from lever l2, this active jawvll’
and the superposed-seam portions are brought
down into the position shownain' Fig. 5, thereby
completing the second‘ step of the seaming opera
tion, and providing a tightly interlocked seam. 7
It should be noted that inbothrof these steps of
60 the seaming operation the lever I2: serves as a
stationary or holding lever; while ,le-ver, ' H is
moved by swinging it outwardlyaway from lever
l2, thus functioning as the active lever; Like
wise‘ note that, jaw‘ member H, which‘ is ?rmly
65 secured‘ to the swingable lever‘ H, is swung‘during
both steps of the seaming, operation; while jaw
member la is provided with‘ slidablemovement
relative to theother jaw member and parts.
I claimzl
70
.
'
a
.
l.v A seaming tool comprising a pair of levers
and a pair of jaw members, means connecting
the levers for relative pivotal‘: movement, means
for mounting one of said ,jaw'members ?xedly
with one of said levers: and the said connecting
means, means between, the second jaw member
30
movement, a pair of jaws and means for mount
nected with said second jaw and provided with
means embracing one of said levers to be slidable
longitudinally thereon, whereby to increase auto ,55
matically the leverage of said one‘ lever and'
thereby the force applied thru the levers on the
jaws during the seaming operation.
'6, The subject matter set forth in claim 5, and
wherein the ?rst said jaw has‘ a depending por
tion, while the second jaw has a lower plate-like ‘
co
portion and its slidable mounting means adapts
it to slide inwardly and upwardly toward the
hinge during operation and thereby form a
tightly clenched seam.
65
7. A tool for seaming sheet metal, comprising
a pair'of levers and hinge means having a lever
secured to each of its opposite hinge portions, a
pair of angle-shaped jaw members, one having an
upper mounting portion secured to a hinge por 70
tion and lever and also having a relatively broad
jaw portion depending therefrom, the second
jaw-member having a relatively broad jaw por
tion extending below the‘ hinge means and to
ward the idependingiportion, means for mounting 75
3
2,181,821
the second jaw member on the second hinge por
tion and provide sliding movement inwardly to
ward the depending jaw portion and slightly up
wardly toward the hinge means, and means con
nected with said slidable jaw member and being
connected with said one lever to move longitudi
nally thereon,- whereby to automatically and
gradually increase the leverage of said one lever
and thereby the force exerted thru the levers on
10 the jaws during the seaming operation and pro
ber having an upper mounting portion and hav
ing a plate-like jaw extending therefrom hori
zontally toward the depending jaw, slidably con
nected companion means having one means se
cured to the mounting means of the second jaw 5
member and having the other means secured at
a slant on the second hinge leaf to provide the
horizontal jaw an inward and slightly upward
sliding movement toward the depending jaw and
the hinge, and means including a member slid
vide a tightly clenched seam, said tool being
able on one of the levers also link means con
adapted for different seaming operations by re
nected to said member and to the mounting
means of said second jaw member, whereby the
force exerted thru the levers on the jaws auto
versing it on the seam.
8. A tool for seaming sheet metal, comprising
15 a pair of levers and a leaf hinge having a lever
secured to each of the hinge leaves, a pair of jaw
members, one having an upper mounting portion
secured to a hinge leaf and having a plate-like
jaw depending therefrom,’ the second jaw mem
10
matically and gradually increaseb during the 15
being adapted for different seaming operations by
operative movement of the levers, and the tool
reversing it on the seam.
CARL R. SCHLICHT.
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