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Патент USA US2137113

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Nov. 15, 1938.
' J. P. HOBART ET AL
'
2,137,113}
WORK CLAMP
Fliled Feb. '19, 1937
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‘ fa’nggrd‘é'f Krueyer, '
THE/IPA
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BY‘
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Patented Nov. 15, 1938‘
22,137,113
‘ UNITE-l5‘) STATES‘
‘
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John P. Hobart, Kalamazoo, and: Edward"{Crv
- Krueger, Otsego, Mich., assignors to'Hanimond .
5
: . ,
‘Machinery Builders, Inc., Kalamazoo, .Mmh.,.a _‘ . ‘
.comoration of‘Michiganjjj
p.
v ApplicationFebruary 19; l937g‘ksoerial
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‘
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1263562.v "
'12 Claims. ‘(ciao-#60), I
This invention relates generally to work clamps" opening. I3 in‘ line with theilbea'rin'g ll. ’ A‘cam
and'more particularly to work clamps for sawing
,ll'iisiprovi'ded with ash'ait l5'extending upwardly
andftriinming machines of the, type used by
printers;
‘V
_
‘
_
e,
through the-opening 13 andbearing ll for rotary?‘ '
movement.‘- Secured" to the upper .end'ohthe
'
‘ Themain'objects of our invention are:
shaftfis‘ af’?ngere‘pi'ece'iI6‘ forgtu'rning the cam
we
1st, tofprovide a workeclamp‘_ that is simple
and eifective in operation, which is’easy ‘to ma;
.nipulate, and positive in action.
. v
t4 into‘iand "outfof engagement: with the bottom '
suriace-fofthe'itable'5. 'The'cam “is adapted
to pass through the hole 6- when aligned; with
' 7
2nd, to provide improved means foridetach‘ably ' the‘ collaril't; *We thus provide. a veryie?icient
it? connecting the work clamp to the saw table.
and‘ effective detachable connection between the 15'
' 3rd, to provide improved means in a work clamp‘v
clamp andthe table: ’ The movement of the ?nger
' piece?l?is limited
' to
’ Other
prevent
‘objects
marring
of ofthis
theparts
invention,‘
in operation.
not‘ atthis';
astop l'l' on the top of'the-Y.
‘)Theend
wall 3. walls3and 4 of. . the base
have
e e aligned
time more particularly enumerated, will be unli end
g5 derst'ood from the ‘following 'detailed‘description ‘ laterally openingtgrooves l’8‘ioffcircular‘dovetail
ofthesaine.
'
'
V
i
cross "section for slideably supporting‘i'anf'elo'n-e" .
\
An illustrative embodiment disclosing the im
gatedx'bar l9. se'cure'dito the. innerv side offan'
elongated plate 20; .rzThe longitudinal. edges of
provernents in’ ‘work clamps 'made‘ according to‘
this invention is- shown in‘ the’ accompanying
2o
drawinggin
which:
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>
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-
'
the‘platie 12.0‘ are flush withrthe upper, and. lower
surfaces; of the endwalls- of‘the base. ‘Awork
ehgagingjaw 2| "is pivoted at 22‘ to the end of
‘
~Fig; 1‘ is‘a top plan view, parts being, broken‘
away and shown in section.
_.
' '
g ‘
thebar-JQ;
Fig. 2 is afragmentary longitudinal sectional
>
aunitrrelative to,_-the basal‘; -"
~
;
,-
p
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theiblock 23q~bar?l9 andp'late .20 are slideable as _
'
Thefblockq23- andfthe end 'walls ,3 and’ 4 of
the'base; have aligned-bores”, '12.‘! and 28 for.
Fig. 5 is ‘a transverse section‘ on line ‘5-5 of
.
if"
nal-Islot 25 in‘ the" side wall 2 of the base. Thus
Fig. 4 'is a'transverse‘ sectional view‘ on line.
44-4 of Fig. 1.
i‘
aitongue 2llijslideably co-acting withja longitudii-i
view taken'on-the line 2—'-2 of Figi 1. I ‘
25 - Fig. 3 is a view in side elevation oithefwoik
clamp in operative position.
‘
A“ block ‘23' is secured torthe bar‘l'9 and. hasl
~
~ the passage of a rod .29.. Thebo're26 in the. end '
i Fig. 6 is a transverse section ‘on'line 6%6 of ' wall3;is~fprovided with. aeplug: 3J1 constituting a
Fig; 1.
' Fig. '7 is an‘enlarged view'in' end elevationfof
theiwork engaging jaw.
“
‘
30.1
stop ~for, the rod 29.; A barrel 3! is secured to
the end‘ wall 4' and is provided with a closurei32;
Disposed in»the—-barrel betweengthe-closure _32
'
Qur clamp is an improvement over clamps of
and the-outer end'o'f .the rod‘ 29' is a compression
the type‘ disclosed in the paten‘tsgto Walter. S. ' spring. 33 acting/to resiliently'bias the rod 29 ~
Runnels,‘ £582,307, ‘dated ,April 27,1926, andto
toward theqplug 30. Thus the rod 29 is free to‘
Cornelius Koets, 1,841,822'dated January ‘19, 1932. be " moved» longitudinally a to “a 1 limited extent
=‘Refe‘rring'to'the‘ drawing, lY'is a base having '_ against the force‘ of‘ the- compression spring‘33.
a longitudinal side wall 2 terminating in opposite
On the irod-la-forslideable movement, is pro
vided ayoke .Mghaving a longitudinal‘ bore. for 46
on the'table 5 of the sawing‘ and trimming ‘ma-‘ [the passage ,oiv‘the rod: A=wedgeqj35 is pivoted
chine. The table 5'is‘vv provided with a hole 6 at 36. toftheyoke midwayof the ends thereof andv
.end walls‘tl and 4. ‘This base isadapt'ed to rest ‘
and an inclined edge slot 1, see Fig. 3. The base I has a curved surface 31 adapted to quicklyiene
of the clamp ‘has a dependingportion.‘ 8 ‘over
gage the-rodand'draw‘the-bottom half of the
hanging‘the table 5 adjacent the slot 1.- ?A stud bore 38 into ‘uniform clamping relation with the
8 is threaded" through the~'base 'porti'onl?i yfor .
rod throughout‘the-lengthof the' yoke.
This
longitudinal adjustment and'is adapted to en- ' iska v'eryimportant feature of my. invention.‘ i
gage the inclined'slot to hold-one end of theibase
u in place on'the table. The stud ‘is ‘securedin
adjusted position by a lock nut‘ 10. -
' ’
.
The end wall 3 of the? base is provided with
'
‘
“The block 23‘ a_nd;yoke 3.4- are'resiliently drawn:
towardieach other by,means of a compression
springja‘acting on~a screw member‘ 39 threaded 50
a vertical bearing H‘ and has a conical collar 12
inthelgblock andfhaving-its head 40 in a bore 4|.
in the yoke; see‘Fig. 2.‘ This“ arrangement pro
secured to the bottom thereof. to ?t within the
vides‘a very effectiveconnectionrbetween the yoke
55- hole 6 in the‘tablei- The collar has‘v an eccentric 1 ‘' and theblocka:
2.’,
2,137,113
A hand lever 42, having a ball grip 43, is piv
oted at 44 to the top of the block 23, and is held
in inclined upright position by means of a com—
pression spring 45 having one end bearing against
the block and the other end against the lever.
The lever 42 is connected to the wedge 35 by
.means of a link 46, the link being connected to
the leverI-at 4‘!' and to the edge at 48. With the
parts in‘ the position’shown in Fig. 2, the jaw bar
10 l9 may be adjusted longitudinally relative to the
base I by pulling or pushing the hand lever 42
as desired.
Thus the jaw 2| is moved into *en-
gagement with the work, andthe hand lever is
swung downwardly to a substantially horizontal
15
position as shown by Fig. 3.
,
,
'
‘a
The initial movement of the hand lever causes
the link 46 to turn the wedge 35 into locking en
gagement with the rod 29. Continued downward
movement of the hand lever causes the connec-'
20 tion 41 between the link and lever to be raised
into a substantially horizontal position, as shown
lever to said wedge so that the latter is turned
slightly when the hand lever is swung downward
ly toward the horizontal, said last named spring
acting to hold the parts temporarily‘ in such po
sition with the wedge, link and hand lever pivots
in substantially the same plane.
3. A clamp comprising a base,'an elongated jaw
bar moveably supported at the side of said base,
a block ?xed to said jaw bar, a hand lever piv
oted to said block, means acting to elevate the
~ free end of said hand lever, a yoke, a spring biased
rod, a rod engaging wedge pivoted to said yoke to
engage said rod'between the ends of the yoke, a
‘link connecting said hand lever to said wedge so
1 that when the hand lever is swung downwardly
the wedge is turned to engage said bar and lock
the yoke "and bar together, and spring means
urging said block and yoke toward each other and
acting to hold the parts in temporarily locked 20
relation when the linkand hand lever are sub
byKFig. 3, forcing the spring 33 to act through
stantially inline with one another.
the parts on the work engaging jaw 2| to hold
the; work in effectively clamped position. The
4. A clamp for use‘with a table having an open
ing and an inclined edge slot, comprising a base
adapted to rest on‘said table having a depending 25
25 work is released by merely touching the lever to
break the toggle lockformed by the positioning
of the centers 44, 41 and 48in substantially the
same
plane;
,
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r
>
.
From the above description of our‘ work clamp
so, it.will be apparent to those skilled in the art
that-we ‘provide one which is very effective and
ef?cient, easy to mount and ‘remove from‘ the
table, and simple to manipulate.
We‘claim:
35
slightly, and link ineans connecting the hand
:1
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‘
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-~
.
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“l. A clamp comprising a ‘base having a longi
tudinal‘ side wall terminating in opposite end
walls, an elongated bar slideably engaging said
end walls so that the parts‘ are held in assembled
relation with the bar freely moveable longitu
40. dinally relative to the base, a work' engaging'jaw
on the end of said bar, a block secured to said
bar, said end walls having aligned bores, a rod
extending’through said bores‘for limited longi
tudinal movement, spring means resisting longi
45. tudinal movement of said rod relative to the base,
a yoke normally moveable relative to said rod, a
portion overhanging said table adjacent said slot,
a stud threaded through said portion for longi
tudinal adjustment and adapted to engage said
inclined slot-to hold one end of said base in place
on the table, and a lock-nut onsaid stud for se 30
curing it in adjusted position, the base- having a
vertical; bearing near the other end thereof, a
conical collar secured to said base to ?t within
said hole in the table and having an eccentric
opening in line with said» bearing, a camhaving 35
an eccentric shaft'extending upwardly through
said opening and bearing. and a finger piece se
cured to the upper end of said shaft for turning
said cam into and out of engagement with the
bottom surface of said table, the cam being adapt 40
edto pass through said hole when aligned with
said
collar.
_
-;
;
,
, '
5. A clamp for use with a table having an open
ing and an inclined edge slot, comprising a base
adapted to rest on said table and having a de 45
pending means adaptedv to engage said inclined
slot to hold one end ‘of said base in place on the
table, the base having a vertical bearing near the
other end thereof, a conical collar :secured to said
base to ?t within said hole in the table and hav-' 50
tosaid
wedge,
spring
means-between
said
block
501
and‘ lever acting to hold said lever, in its normal ing an eccentric opening in line with said hear
position, and ‘spring means urging said block‘ and ing, a cam vhaving an eccentric shaft extending
wedge pivoted to said yoke and being normally
out of "engagement with said rod, a hand lever
pivoted to said block, a link‘ connecting said lever
yoke together; operative movement of said lever
first ‘causing said link to actuate said wedge into
55. locking engagement with said rod and then forc
ing the yoke away from‘ the block so that the
action of the spring means on'the rod is trans
mitted to said work engaging jaw, the connection
between the.’ link and lever being also moved into
60. the line of centers of the lever pivot and the con—
nection between the link and wedge whereby the
upwardly through said opening and bearing, and
a ?nger piece secured to the upper end of said
shaft for turning said cam into and out of en
gagement with the bottom surface of said table,
the cam being adapted to pass through said hole
55
when aligned with said collar.
.
V 6. A clamp for use with a table having an open
ing, comprising a base adapted to rest on said 60
table and having a vertical'bearing; a conical col
force of the block-yoke spring means temporarily ' lar secured to said base to ?t within said hole in
holds the parts in such position with the lever thetable and having an eccentric opening in line
with said bearing, a cam having an eccentric shaft
substantially ‘horizontal. ‘
'
65'.
2. A clamp comprising a ‘spring biased'rod, a
jaw bar disposed in spaced parallel relation to
said'rod, a’block ?xed to said jaw'bar, a'hand
lever pivoted to said block,hmeans urging said
hand lever toward upper inclined position, a yoke
70 slideable on said rod, means acting to urge said
extending upwardly through said vopeningand 65
bearing, and means secured to said shaft for turn
ing said cam into and out of engagement with
the bottom. surface of said table, the cam being
adapted to pass through said 'opening when
aligned with said collar.
‘
'7. A clamp comprising a spring biased rod, 'a
block and yoke toward'each other, a wedge piv
oted to said yoke above'said rodintermediate of
jaw bar arranged in spaced parallel relation to
the length of the yokeand having a cammed sur
said rod, a hand lever pivoted to said‘ jaw bar, a
yoke normally slidable relative tov said rod and
face for smoothly engaging said rod to lock the
yoke in place thereon when the wedge» is turned‘
70
having a longitudinal bearing therefor, a wedge 75
'
3
2,137,113
‘pivoted to said yoke midway of the ends thereof
and having a curved surface adapted to quickly
engage said rod and, draw the bottom half of
said bearing into clamping relation with said rod
throughout the length of the yoke, link means
connecting said hand lever to said wedge to turn
the latter. into, engagement with the rod when
the hand lever is actuated tomove said yoke rela
tive to said jaw bar, and means acting to hold said
hand lever in position with'the rod ‘connected v
through said yoke to said jaw bar.
8. A clamp comprising'a rod, a block, a hand
lever pivoted to said block, a yoke normally slid
able relative to said rod and having a longitudinal
bearing therefor, a wedge pivoted to said yoke
end of said rod so that the .rod
biased toward 'saidlstop.
_
is resiliently ‘
‘
10. A clamp comprising a rod, a yoke normally
slidable relative to said rod and having a longi
tudinal bearing therefor, and a wedge pivoted to
said yoke between the ends thereof and having a
curved surface adapted when turned to engage
said rod and draw the bottom half of said bear
ing into clamping relation with‘said rod through
out'the length‘ of the yoke without marring the
parts.
:
.
l
r
g.
11. A clamp comprising a base, a rod slidably
mounted in said base, means preventing move- ' '
ment of thevrod in one directiomspring means
tending to prevent movement of the rod in the 15
between the ends thereof and having a curved _ other direction, a jaw bar disposed for move
surface adapted to quickly engage said rod and
ment in, substantial parallelism to said .rod’s
draw the bottom half of said bearing into clamp- ' movement, operating means mounted upon said
ing relation with said rod throughout the‘ length
of the yoke, means connecting said hand lever to
said wedge to turn the latter into engagement
with the rod when the hand lever is actuated to’
move said yoke relative to said block, and means
acting to hold said hand lever in position with
the rod connected-through said yoke to said block.
9. A clamp comprising a base'having end walls
provided with aligned bores, a stop in the bore
of one end wall, a rod extending through the‘
bore in the other end wallrand terminating-at
said stop, a barrel secured tov said last named
end wall, and a compression spring disposed in
said barrel between the end'thereof and the outer '
jaw bar, agripping mechanism slidablyreceived
upon the slidablymounted rod, and means coop
20
eratively associated between the operating means '
andrithe gripping mechanism whereby the-gripr
ping mechanism is rendered effective to grip and
also the operating means and thegripping'means
aregmoved‘ apart for‘ the purpose described.
25
12. A combination of elements as set forth in
claim 11 in which the ‘cooperatively associated ,
means includes a toggle lever lconnection'gsaid» ‘
J toggle
tially straight
lever‘ connection
line position
beingduring
movable
one
to phase
substané
of 30
its movement.
'
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>
JOHN P. VI-IOBART,
‘
‘ EDWARD C. KRUEGER. l
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