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Патент USA US2118379

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May 24, 1938.
j
H. A. GREEN
ï
DAVENPORTCLAMP
`
~
original Filed Märch 13, 1955
2,118,379
`
5 sheets-sheet l
.l ilu
\
HARRY A. @Rf-:5N
IN VEN TOR.v
A TTORNEYS.
“tay 24, `i938.
'
, ÈH, AD GREEN
>
DAVENPORT-
CLAMP
-
2,118,379
I
. Original Filed March 15, 1955
5 Sheets-Sheet 2
TIG.;
I 2.-'
HARRY A. ¿FREE/v
INVEN TOR.
BY
ATTORNEYS. v
May 24, 1938.
_
_
H. A. GREEN 1
2’M89379
DAVENPORT CLAMP'
l
‘original Filed Maron 15, 1935
s sheets-sheet s
HARRY A. GREEN
'
.
l
BY
JNVENTOR.
~
ÁO
A'TToRNEYS.
2,118,379
Patented May 24, 1938
UNITED STATES
PATENT ori-‘ICE
2,118,379
DAVENPORT CLAMP
Harry A. Green, Portland, Oreg.
Application March 13, 1935, serial No. 10,848
Renewed November 3, 1937
9 Claims.
(Cl. 1114-291)
This invention relates to improvements lin curved back sections and outwardly diverging
arm rest sections.
,
machines for assembling furniture and is par
I attain the foregoing objects by providing a
ticularly adapted for uniting and securely clamp
ing together the various structural elements of machine comprising two» frame sections, one of
said sections lying- in a horizontal plane, the
15r davenports.
Heretofore, in the construction of furniture of other in a substantially upright plane, and both
this character it was necessarir to assemble the
structural elements thereof into individual units
and then assemble these various units into a
10 completed piece . of furniture. This sort of
progressive assembly Work required the use of
numerous hand-clamps vnot only in the assem
bling of each individual element or unit but also
in the assembling of the individual units into
15 an entire unit. The inaccuracies and inefii
ciencies of such methods of clamping furniture'
together in the assembly operation are obvious
and particularly since it is impossible by such
hand-clamping methods to apply clamping force
20 equally and simultaneously on all of the parts
of the frame in order that all the doweled por
tions will be forced together to the fullest exn
tent and the alignment and desired form of
frame work maintained. Moreover, such hand
25 clamping by means of various auxiliary clamping
devices also increases the time of manufacture,
and thereby increases the cost of production.
Accordingly, therefore, the principal object of
my invention is to provide a machine adapted to
.3,0 receive a completely assembled davenport with
the various parts thereof loosely joined together,
and adapted thereafter, by a single operation on
the part of the operator to exert clamping force
equally and simultaneously to all the parts to
3,5 securely unite them to their limits of abutment
intov finally assembled form.
.
Another object of the invention is the provisio
of means for automatically locking the machine
in its operative clamping position to securely
4:0y hold the various elements in their united posi
tions to receive reinforcing members such as
blocks, braces, and the like. Also, during the
application of these various reinforcing elements
the previously united structural elements of the
davenport are permitted to dry to thereby in
sure a more permanent union between all of the
elements. .
'
of said sections united with each other along
their adjacent edges. I also provide a plurality
of adjustably mounted worlc‘ abutments, and
a plurality of individually adjustable clamping 10
elements which are adapted to be moved simulta
neously toward the work being dealt with. Said
abutments and clamping elements being pro
vided on both the upright and horizontal frame
members.
,
15
These and other objects will appear as my in~
vention is more fully hereinafter described in
the following specification, illustrated in the ac
companying drawings and ñnally pointed out in
the appended claims.
20
In the drawings:
Figure 1 is a top plan view of my new and
improved machine, with parts removed for con
venience of illustration, and showing a portion
of a davenport frame in operative engagement 25
with the machine.
Figure 2 is a front elevation of the machine
showing the frame work of the back rest of the
davenport in operative engagement with the up
right frame members of the machine.
.
30
Figure 3 is an'end elevation of Figure 1, look
ing in the direction of the arrow in Figure 1.
Figure 4 is a detailed top plan view of one
of the adjustable and movable clamping mem
bers.
f
35
Figure 5 is a longitudinal sectional View
through Figure 4.
Figure 6 is an end elevation of Figure 5 as
viewed from the left hand side.
Referring now more particularly to the draw- 40
ings, my invention consists of a horizontal frame
member generally indicated at l, which is sup
ported at its front side by suitable legs 2 and 3
provided With casters 4. This frame will be
hereinafter referred to as the horizontal frame. 45
Supporting the rear edge of the horizontal
frame is an upright frame generally indicated
at 5 which consists of vertical members 6 and 1,
A still further object of the invention is the
provision of a machine of this character where
and a transverse member 8. The rear corners
of the horizontal frame are secured to the ver- 50
in the clamping members and abutments are all
tical members 6 and 1 of the upright frame by
any suitable means, such, for instance, as bolts,
individually adjustable and thus adapted to op
erate upon davenport frames of various sizes
and which may vary from the rectangular and
55A which are provided with rearwardly inclined or
rivetsl or the like. The lowermost ends of the
end members 6 and 'l are secured as at 9 to a
transverse member Ill which extends from the 55`
2,118,379
legs 3 and 4 rearwardly beyond the point of at
tachment of the end members 6 and 1 and ter
minates as at II in connection with upright
braces I2, which at their uppermost ends are
Cl secured to the transverse member 8 of the up
right frame for stabilizing the same. 'I'hus it
and is also pivotally connected as at 39 with a
pair of parallel links dll. These links extend
from the collar 31 toward the actuating shafts
and are operatively connected therewith by
means of arms «il carried by collars 4Ia which
are secured to the shafts by any approved means,
will be seen that I provide a substantial and
such as set screws, or the like, not shown.
rigid structure consisting of a horizontal frame
shafts shown in Figures 4 and 5 may represent
and an upright frame.
any one of the shafts I3, I1, I8 and 22.
The upright frame may
10 be slightly inclined rearwardly to receive, in
proper working relation, the correspondingly in
The
The
links are pivotally connected as at 42 to the 10
lower ends ofthe arms 4I so that rotation
clined back rest of a davenport, as shown in Y of the actuating shaft will cause the platform
to move in either direction toward or away from
the work being dealt with and which work rests
upon the tops of the channel members which 15
tional manner.
form the supporting tracks. The relation of the
Figures 2 and 3 and which consists of upright
members I2a and transverse members 12b which
15 are doweled and glued together in the conven
25
30
35
40
45
50
55
60
Extending full length of the upright frame is
platform to the actuating shaft may be adjusted
a shaft I3 which is rotatably mounted at its ends
in suitable bearings I4 which are mounted to- the
end members 6 and 1. On this shaft I mount
a beveled gear I'5 Yin operative engagement with
by means of the threaded shaft 34 which when
rotated in either direction will advance or re
tard the platform with respect to its support. 20
Upon the upper surface of the platform I pro
a companion gear I6 which is secured to one Ívide any suitable form of clamping member
end of a shaft I1 which is rotatably mounted
which may be in the form of an angle bar as
within the upright frame and disposed at right indicated at 43. This abutment is movable with
angles to the shaft I3. A similar shaft I8A ex
the platform and engages under pressure with 25
tends full length of the horizontal frame and is the work being dealt with as the actuating shaft
journaled in the ends thereof by suitable bear
is rotated. Within the frame 25, I provide a sta
ings I9. This shaft is alsov provided with a tionary abutment 43A which is identical with
beveled gear 26 cooperatively engaging with a the movable clamping members except that it
companion gear 2I which is secured to the end is not connected with an actuating shaft for lon 30
of a transverse shaft 22' which is rotatably gitudinal movement inthe frame but instead is
mounted Within the horizontal frame and dis
adjustable lengthwise of the frame torform a
posed at right angles to the shaft I8. Y Both of limit stop for the work. The platforms which
said shafts I3 and I8 extend entirely through are slidably mounted within the frames 26 and
the end members of the machine and are op
21 are operatively connected with the shafts I3
eratively interconnected by means of links 23 and I1 by means of the links 4D, arms 4I and
which are actuated by a handle 24, whose one collars Ma, as aforesaid.
end is secured to the shaft I8. Thus it will be
In addition to the abutments and clamping
seen that actuating the handle from one posi
membersV above described I also provide a ñxed
tion to another, such for instance, as fro-m the abutment 44 arranged transversely of the hori 40
full line position to the dotted line position shown zontal Vframe and secured thereto by any ap
in Figure 3, will cause both of said shafts to proved means. This abutment may be in the
rotate, and also cause the transverse shafts I3 form of an angle bar having spaced adjustable
and 22 to rotate. Within the upright frame I abutments .45 threadedly mounted thereon.
securely mount a plurality «of supplemental Along the rear edge ofthe horizontal frame I 445
frames generally indicated at `25,726 and 21. also provide ñxed abutments 46 likewise provided
Each of said frames consists of a pair of par
with adjustable abutments 41. Within the frame
allel channel members arranged face to face 25, I provide an adjustable abutment 41a
to form tracks for the adjustment or movement mounted to a support 41h which is carried by
of the abutments or clamping members therein. the transverse members lä'ì’c of the frame 25.
50
The horizontal frame is likewise provided with
At the right-hand side of the horizontal frame
supplemental frame members which are general
I provide another supplemental frame indicated
ly indicated at 28, 29 and 30. VInasmuch as these at 48 within which one of the platforms is slid
various members are substantially identical with ably mounted and operatively connected to the
each other in construction, a description of one shaft 22. This platform is provided with a
will suiñce for all. As best illustrated in Figures clamping element 49 having adjustable abut
4 to 6 inclusive, the movable clamping members _ments 50 threadedly mounted thereon.
consist of a platform 3| which constitutes one
On the platforms which are slidably mounted
of the work rests andY whose upper surface lies Within the frames 28 and 36 in the horizontal
flush with the top surface of the channel mem
frame I pro-vide upstanding clamping members`
bers so that a smooth surface is presented across
5I provided with adjustable abutments 52, which
theY tops of the channels and the platform. The
end walls of the platform extend downwardly
as at 32 and outwardly as at'33. The portions
65 k33 acting as a sliding support for the platform,
are adapted to bear against the outer ends of
the arms of the davenport frame, as best shown
in Figure 3.
are adapted to move from end to end in the di
rection of the length of the channel members.
Extending entirely through the downwardly
turned walls 32 is a threaded shaft 34 which is
70 rotatably mounted therein and held in place at
one of its ends by a nut 35, and at its opposite
end by any approved form of actuating collar
For accommodating work of various heights 65
the entire frame 21, in the vertical frame, is slid
able vertically in the channel membersrat Vboth
of its ends. For convenience in adjusting the
frame 21 to various heights I provide a sc_rew
shaft 21a whichV is secured as at'21h'to one side
of the frame 21.
The opposite end of the screw
Threadedly mounted upon the
shaft extends through the transverse member 8
and is provided with a nut 21o, which, when
shaft 34 is an internally threaded collar 31 which
is secured to the underside of the platform 3'I,
rotated will raise or lower the frame 21. When
an adjustment is t'o‘be made vthe setscrew in the
or handle 36.
2,118,379
collar Ma. is ñrst loosened» so that the links 40
and their connection to theshaft I'I are free to
3
tions, a-work clamping member-secured to each
work rest, Yadjustable abutments opposing said
work rests, .and a single operating means con
nected with all said work clamping ymembers and
which are to be united in the assembling of the ' adapted to operate the same simultaneously.
3. A davenport clamp comprising. two frame
completed frame, are ñrst provided with drilled
sections
secured together at one side, one of said
holes in certain of the members and dowel pins
in the companion members; the dowels'being sections lying in a horizontal plane and the other
adapted to ñrmly engage within the’drilled holes, in a vertical‘plane, both of said sections being
joined together along the rear edge of the hori
10 all in accordance with the usual practice in the
zontal frame, spaced, independently adjustable
construction of furniture. In Vpreparing furni
move
The along
various
thestructural
shaft.:
elements
»
of davenports
l -
ture frame work for use with my invention, these
various structural elements are first joined to
gether loosely, i. e., they are’ joined together with
15
sufficient hand pressure so that the entire lunit
may be lifted from the assembly bench 'and placed
upon the horizontal frame and work rests of my
machine with certain structural elements bear
ing against the ñXed abutments on the machine.
20 Following this, the operator of the machine
presses downwardly upon the handle 24 to simul
taneously actuate all of the shafts I3, I'I, I8 and
22, which will move all of the clamping members
against the various structural elementsl of the
davenport in opposing directions,.so that all of
the elements will be forced together to their abso
lute limit of abutment. Rotation of shaft I8 will
drawthe clamping elements 5I and 43 against
the front of the davenport structure, and rota
30 tion of shaft 22 will push the abutments 50 against
the. end of the davenport. Rotation of the shaft
I3 draws clamping element 43, in the vertical
frame, against the transverse member I2?) of the
davenport structure and rotation >of shaft Il'
35 draws the clamping element'in frame 21 against
the end of the davenport structure.' With the
actuating handle thus in its down position it will
remain locked in this position by reason'of vthe
relation of the links 23 to the shafts VI3 and I8
The turning of the shafts
moves the Work rests and abutments, the ñnal
40 and to the handle.
adjustments of the abutments against the work
being made by rotating the screws.
Although I have shown hand actuating means
45 for rotating the actuating shafts it is to be under
stood that automatic means may be used which
may be either in the form of an air actuated
lever, or an electrically actuated lever, or I may
choose to connect the actuating handle with a
50 foot
pedal within convenient reach of the
operator.
While I have shown a particular form of ern
bodiment of my invention, I am aware that many
minor changes therein will readily suggest them
55 selves to others skilled in the art without depart
ing from the spirit and scope of the invention.
What I claim as new and desire to protect by
Letters Patent isz
1, A davenport clamp comprising, two frame
60 sections, one of said sections lying in a horizontal
plane and the other upright, spaced, independ
ently adjustable work rests provided on each of
said frame sections, a work clamping member se
cured to each work rest, adjustable abutments
65 opposing said work rests, and operating means
connected with said work rests for simultaneously
advancing them toward their respective. abut
ments.
2. A davenport clamp comprising two frame
70 sections secured together at one side, one of said
sections lying in a horizontal plane and the other
in a verticalY plane, both of said sections being
joined together along the rear edge of the hori
zontal frame, spaced, independently adjustable
75 work rests provided on each of said frame sec
work rests provided on each of said frame sec
tions, a work clamping member secured to each
work rest, adjustable abutments opposing said
Workrests, operating means connected with all 515
of said Work clamping members and adapted to
operate the same simultaneously, and means for
temporarily locking said operating means in posi
tion when the work clamping members have been
i20
moved into active position.
4. A davenport clamp comprising, two frame
sections, one of said sections lying in a horizontal
plane and the other in a vertical plane, both of
said sections being joined together along the rear
edge of the horizontal frame, spaced independ
ently adjustable work rests provided on the op
posite ends and one side of said horizontal frame
section, said work rests being provided with work
clamping members and adapted to engage oppo
site ends and one side of the work, an adjustable.
abutment provided at one end of said upright
frame section, a work rest comprising a work
clamping member provided on the opposite end
of .said uprightframe, said abutment and work
clamping member adapted to engage both ends
of the upper portion of the work, an intermedi
ate and adjustable work clamping member pro
vided on said upright frame section for engaging
the top edge of the work, means for adjusting
said clamping members relatively to the work,
operating means connected with all of said work
clamping members and adapted to operate the
same simultaneously.
5. A davenport clamp comprising two frame
sections, one of said sections lying in a hori 45
zontal plane and the other in a vertical plane,
both of said sections being joined together along
the rear edge of the horizontal frame, spaced,
independently adjustable work rests provided on
the opposite ends and one side of said horizontal 50
frame section, said work rests adapted to engage
opposite ends and one side of the work, certain
of said work clamping members provided with
upstanding abutments, said upright frame section
provided with a work rest at one end and an 65
abutment at the opposite end, said last mentioned
work rest being adjustable relatively to the work,
an adjustable work clamping member provided on
the said upright frame section for engaging the
top edge of the work, operating means connected 60
with all of said work clamping members and
adapted to operate the same simultaneously, and
means for temporarily locking said operating
means in position when the work clamping mem
bers have been moved into active position.
165
6. A davenport clamp comprising, two frame
sections, one of said sections lying in a hori
zontal plane and the other in a vertical plane,
both of said sections being joined together along
the rear edge of the horizontal frame, work rests 70
provided on the opposite ends and one side of
said horizontal frame section, said work rests
adapted to engage opposite ends and one side
of the work, and one of said work rests compris
ing a work clamping member operable to eifect 75
4
2,118,379
a clamping action on the work, an adjustable
abutment provided at one end of said upright
frame section, and a work clamping member pro
vided on the opposite end of said upright frame,
an intermediate and adjustable work clamping
member provided on said upright frame section
for engaging the top edge of the work, means
for adjusting all of said clamping members re1atively to the work, operating means connected
provided on each of said frame sections, a worl;
clamping member secured to each Work rest, said
Work rests slidably mounted upon guide elements
carried by the frame sections, respectively,
longitudinally andV transversely arranged rotat
with all of said Work clamping members and
able shafts journaled in said frame sections, re
adapted to operate the same simultaneously, and
means for temporarily locking said operating
spectively, »gears `connecting said longitudinal and
transverse shafts, respectively, operating arms
means in position when the work clamping mem
bers have been moved into active position.
15
sections, >one ofsaid sections lying in a hori
zontal plane and 1the other in a vertical plane,
both of said sections being joined together along
the rear edge ofl the horizontal frame, Work rests
7. A davenport clamp comprising, two frame
sections, one of said sections lying in a hori
zontal plane and the other in a vertical plane,
both of said sections being joined together along
the rear edge of the horizontal frame, spaced
20 apart and adjustable Work rests provided on 'the
opposite ends and one side of said horizontal
frame section, said Work rests adapted to engage
opposite ends and one side of the Work, and one
of said work rests comprising a work clamping
25 member operable to elîect a clamping action on
the Work, certain of said work clamping mem
bers provided with upstanding abutments, said
upright frame section provided with a Work rest,
said last mentioned work rest being adjustable
30 relatively to the work, an adjustable abutment
provided at one end of said upright frame, an
adjustable Work clamping member provided on
said upright frame section for engaging the top
edge of the work, operating means connected
with all of said work clamping members and
adapted to operate the same simultaneously, and
means for temporarily locking said operating
means in position when the work clamping mem
bers have been moved into active position.
8. In a davenport clampI comprising, two frame
10
carried by said shafts, links adjustably intercon
necting said arms >and said work rests respective
ly, and means for rotating said shafts simulta
15
neously and thereby forcing said clamping ele
ments simultaneously upon the Work.
9. In a davenport clamp, two frame sections,
one of said sections lying in a horizontal plane
and the other in a vertical plane, both ofl said
sections being joined together along the rear
2.0
edge of the horizontal frame, spaced, independ
ently adjustable work rests provided V,on each of '
said frame sections, a Work clamping member se
cured to each work rest, means for adjusting
Vsaid work rests and said Work clamping elements
25
relatively tothe work, said work rests slidably
mounted >upon guide elements carried by the
frame sections, respectively, Vadjusting screws
threaded in said clamping members, longitudinal 30
ly and transversely arrangedrotatable shafts
journaled in said frame sections, respectively,
gears connecting said longitudinal and transverse
shafts, respectively, operating arms carried Yby
said shafts, links connecting said arms and said
adjusting screws, respectively, and means for ro
tating said shafts simultaneously and thereby
forcing said clamping elements simultaneously
upon the Work.
HARRY A. GREEN.
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