U.S. patent number 3,794,398 [Application Number 05/238,439] was granted by the patent office on 1974-02-26 for convertible desk and conference table.
Invention is credited to Eugene A. Lindsay.
United States Patent |
3,794,398 |
Lindsay |
February 26, 1974 |
CONVERTIBLE DESK AND CONFERENCE TABLE
Abstract
A convertible desk and conference table having a table-top
surface supported by a pillar means. The table-top surface includes
a central section and two wing sections disposed along and
rearwardly of the central section to define an open area. A leaf
conforming in shape to the open area is disposed on guides beneath
the central section of the table-top surface. A pair of camming
ramps are disposed adjacent the sides of the wing sections and
operate to raise the leaf upward to the table-top surface. The
convertible desk and conference table is changed from a desk
configuration to a conference table configuration by pulling the
leaf along the guides and up the camming ramps. The leaf is then
joined with the central section of the table-top surface to
complete the formation of the conference table.
Inventors: |
Lindsay; Eugene A. (Kenilworth,
IL) |
Family
ID: |
22897900 |
Appl.
No.: |
05/238,439 |
Filed: |
March 27, 1972 |
Current U.S.
Class: |
312/241 |
Current CPC
Class: |
A47B
13/081 (20130101); A47B 37/00 (20130101); A47B
1/05 (20130101); A47B 2200/0079 (20130101) |
Current International
Class: |
A47B
37/00 (20060101); A47B 1/05 (20060101); A47B
1/00 (20060101); A47B 13/08 (20060101); A47b
085/00 () |
Field of
Search: |
;312/241,239,330,204
;108/73,75,84,65,66,69 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
500,539 |
|
Mar 1920 |
|
FR |
|
420,178 |
|
Jan 1911 |
|
FR |
|
Primary Examiner: Gilliam; Paul R.
Claims
What is claimed is:
1. A convertible desk and conference table comprising:
a generally U-shaped table-top surface including a central section
having a rear edge and a pair of wing sections extending along and
rearwardly of the central section to define an open area in said
table-top surface, said wing sections each having a side edge along
said open area, said table-top surface providing a working surface
for use as a desk and as a conference table;
a leaf conforming in shape to the open area of said table-top
surface and providing a relocatable working surface in a conference
table configuration of said convertible desk and conference
table;
means for supporting said leaf beneath the central section of said
conference table and directing said leaf into position in said open
area, said means engaging the lateral edges of said leaf and being
operative to change said convertible desk and conference table from
a desk configuration to a conference table configuration and from a
conference table configuration to a desk configuration;
said means for supporting and directing said leaf including guide
means for vertically and horizontally supporting said leaf beneath
the central section of said table-top surface, said guide means
including a pair of guides, the guides being arranged in complement
with each other;
camming ramp means for raising said leaf upward to said table-top
surface, said camming ramp means being associated with the side
edges of said wing sections; and
support means for holding said leaf in abutment with the rear edge
of the central section of said table-top surface.
2. A the convertible desk and conference table of claim 1 wherein
said pillar means includes at least two pillar structures, one of
said pillar structures being disposed beneath each of said wing
sections.
3. The convertible desk and conference table of claim 2 wherein
each of said pillar structures includes at least two vertically
disposed legs, said legs being connected to a bottom portion of
said wing sections of said table-top surface.
4. The convertible desk and conference table of claim 1 wherein
said support means for holding said leaf includes a mortise in the
rear edge of the central section of said table-top surface and a
tenon in said leaf, said tenon mating with said mortise.
5. The convertible desk and conference table of claim 1 wherein the
open area of said table-top surface is generally rectangular in
shape.
Description
The present invention relates to a convertible desk and conference
table which can be utilized in either a desk configuration or in a
conference table configuration and includes a structure for
facilitating the conversion of the convertible desk and conference
table from one configuration to another.
More particularly, the invention relates to a convertible desk and
conference table having a table-top surface including a central
section and a pair of wing sections extending along and rearwardly
of the central section to define an open area adjacent the rear
edge of the central section of the convertible desk and conference
table. A leaf conforming in shape to the open area of the table-top
surface is utilized for filling the open area when the convertible
desk and conference table is in the conference table configuration.
Means is provided for storing the leaf beneath the central section
of the table-top surface and for permitting the leaf to be moved
into the open area of the table-top surface to form the conference
table configuration.
One aspect of the convertible desk and conference table embodying
the present invention is that the conversion from the desk
configuration to the conference table configuration can be
performed without removing or disturbing materials which are
located on the desk. Also, the convertible desk and conference
table embodying the present invention can be changed from the
conference table configuration to the desk configuration without
distrubing the materials on the desk portion of the convertible
desk and conference table.
Convertible units of furniture which can be changed from one
configuration to another configuration, such as a convertible desk
and conference table, often require complex linkages to perform the
conversion. These linkages take up space within the convertible
furniture unit and make more difficult the manufacture of the
convertible furniture unit. Additionally, the complex linkages
typically require precise alignment and may become inoperative or
difficult to operate if misaligned. The convertible desk and
conference table of the present invention overcomes these
difficulties by providing a structure for performing the conversion
from one configuration to another configuration which has a minimum
of moving parts and is not susceptible to misalignment.
Other aspects and objects of the present invention will become
evident from the detailed description and the drawings which
demonstrate one form of the invention, in which drawings:
FIG. 1 is a perspective view of a convertible desk and conference
table embodying the present invention in a desk configuration;
FIG. 2 is an elevational sectional view of the convertible desk and
conference table taken along line 2--2 in FIG. 1;
FIG. 3 is a top view of the convertible desk and conference table
of FIG. 1 in a desk configuration and illustrates a chair for use
therewith;
FIG. 4 is a top view of the convertible desk and conference table
of FIG. 1 in a conference table configuration;
FIG. 5 is a sectional view taken along line 5--5 in FIG. 3;
FIG. 6 is a sectional view taken along line 6--6 in FIG. 4; and
FIG. 7 is a detail view illustrating a form of connection used in
the convertible desk and conference table of FIG. 1.
Referring to drawings, a convertible desk and conference table
embodying the present invention is indicated generally by the
numeral 10. The convertible desk and conference table 10 is
generally U-shaped and in the desk configuration has an open area
20 for receiving a chair 21. A leaf 24 is located beneath the
convertible desk and conference table 10 in the desk configuration,
with the leaf being removed and placed in the open area 20 in the
conference table configuration, shown in FIG. 4.
The convertible desk and conference table 10 includes a table-top
surface 12 supported by pillar structure 14 and 14a. The table-top
surface 12 includes a central section 16 and a pair of wing
sections 18 and 18a which extend along and to the rear of the
central section 12 to define the open area 20. The open area 20, as
best illustrated in FIG. 3, is preferably rectangular in shape and
receives the chair 21. The open area 20 serves as a work area for a
person using the convertible desk and conference table 10 in the
desk configuration. The leaf 24 has a shape conforming to the open
area 20 and is disposed beneath the central section 16 of the
table-top surface 12 on L-shaped guides 22 and 22a when the
convertible desk and conference table 10 is arranged in the desk
configuration illustrated in FIGS. 1,2 and 3.
In order to change the convertible desk and conference table 10
from the desk configuration to the conference table configuration
illustrated in FIGS. 4 and 6 the leaf 24 is grasped and pulled
rearwardly along the guides 22 and 22a. The leaf 24 engages camming
ramps 26 and 26a and is raised upward by the ramps to the table-top
surface 12. The location of the leaf in an intermediate position as
it is raised by the ramps 26 and 26a is shown in phantom in FIG. 5
and indicated by the number 24'. The leaf 24 is then joined with
the central section 16 of the table-top surface 12, in a manner to
be detailed, to complete the change to the conference table
configuration.
The convertible desk and conference table 10 is changed from the
conference table configuration to the desk configuration by
disengaging the leaf 24 from the central section 16 of the
table-top surface 12 and placing the leaf 24 on the guides 22 and
22a. The leaf 24 is then moved forwardly, down the camming ramps 26
and 26a, and along the guides 22 and 22a to the position beneath
the central section 16 of the table-top surface 12.
Referring to FIG. 1, the pillar structure 14 preferably includes a
front interior leg 28, a rear interior leg 30 and an outer leg 32,
each of which are vertically disposed and connected to the wing
section 18 of the table-top surface 12. A T-bar support 34 is
connected to the lower portions of the front interior leg 28, the
rear interior leg 30 and the outer leg 32 to strengthen the legs
and provide structural rigidity to the pillar structure 14.
The pillar structure 14 formed from the interior leg 28 and 30, the
outer leg 32 and the T-bar support 34 provides a particularly
suitable structure for supporting the wing section 18 of the
table-top surface 12. However, other structural arrangements can be
used to form the pillar structure 14. For example, the front
interior leg 28 and the rear interior leg 30 could be utilized
alone without the outer leg 34 to form the pillar structure 14. If
desired a support bar could connect the lower portion of the legs
28 and 30. Thus, the invention is not limited to any particular
arrangement for the pillar structure 14 and various types of
structure can be utilized to support the wing section 18 of the
table-top surface 12.
The wing section 18a of the table-top surface 12 is supported by
the pillar structure 14a which is substantially identical to the
pillar structure 14. The elements of the pillar structure 14a are
indicated with the same numerals as are the corresponding elements
of the pillar structure 14 with the exception that the letter a is
added to the numerals identifying the elements of the pillar
structure 14a. Thus, the T-bar support 34a of the pillar structure
14a corresponds to the T-bar support 34 of the pillar structure 14
and performs the same function as the T-bar support 34.
A storage compartment 36a may be provided beneath the wing section
18a and the central section 16 of the table-top surface 12. The
storage compartment 36a is coupled to the front interior leg 28a
and the rear interior leg 30a of the pillar structure 14a and may
also be coupled to the underside of the table-top surface 12. A
similar storage compartment 36 may be provided beneath the wing
section 18 and the central section 16 of the table-top surface 12
and is similarly coupled to the front interior leg 28 and the rear
interior leg 30 of the pillar structure 14. The storage compartment
36 may also be coupled to the underside of the table-top surface
12. The extent and capacity of the storage compartments 36 and 36a
can be varied to meet the requirements for a given application of
the convertible desk and conference table 10.
If desired a communication center could be installed in one of the
storage compartments 36 and 36a to provide a compact installation
for this equipment which is typically used with a desk. By
installing the communications center in one of the storage
compartments 36 and 36a the communication equipment such as a
telephone need not be placed on the table-top surface 12. This
results in better utilization of the working area on the
convertible desk and conference table 10.
Referring to FIGS. 2 and 3 the L-shaped guides 22 and 22a operate
to horizontally and vertically retain the leaf 24 beneath the
central section 16 of the table-top surface 12. The guides 22 and
22a are arranged in complement with each other and extend
rearwardly from the central section 16 to the camming ramps 26 and
26a, respectively. The vertical sides of the guides 22 and 22a
confine the horizontal movement of the leaf 24 while the horizontal
legs of the guides 22 and 22a provide vertical support for the leaf
24.
The camming ramps 26 and 26a are disposed adjacent the side edges
of the wing sections 18 and 18a, respectively, of the table-top
surface 12 and are utilized to raise the leaf 24 upward to the
table-top surface 12. The profile of the camming ramp 26a is best
illustrated in FIGS. 5 and 6. The profile of the camming ramp 26 is
a mirror image of the camming ramp 26a and in other respects is
substantially identical to the profile of the camming ramp 26a.
In order to facilitate grasping of the leaf 24 during changing of
the convertible desk and conference table 10 from the desk
configuration to the conference table configuration a recessed
portion 38 is provided in the leading edge of the leaf 24.
Preferably, the recessed portion 38 is centrally located between
the sides of the leaf 24. The central location of the recessed
portion 38 permits a balanced force to be applied to the leaf 24
and thereby prevent turning and consequent jamming of the leaf 24
as it is pulled along the guides 22 and 22a.
The rear edge of the central section 16 of the table-top surface 12
includes mortises 40 for mating with tenons 42 located on the
trailing edge of the leaf 24 when the convertible desk and
conference table 10 is placed in the conference table
configuration. A typical construction of the mortise 40 on the
central section 16 of the table-top surface 12 and the tenon 42 on
the leaf 24 is shown in FIG. 7. The tenon 42 can comprise a
rectangular fitting 44 having base edges which are coupled to the
leaf 24 by suitable fasteners 46. Alternatively, the tenon 42 could
comprise a rectangular bar which is wedges into a rectangular
aperture in the leaf 24. The tenon 42 mates with the mortise 40 and
forms a mortise and tenon joint to provide a support means holding
the leaf 24 in abutment with the central section 16 of tee
table-top surface 12.
Other structures could be utilized to hold the leaf 24 in abutment
with the central section 16 of the table-top surface 12 and the
invention is not limited to the use of any particular support means
for holding the leaf 24 in abutment with the central section 16 of
the table-top surface 12. For example, dowels could be affixed in
the trailing edge of the leaf 24 for mating with circular aperture
in the central section 16 of the table-top surface 12. Also,
support tabs (not shown) could be arranged adjacent the side edges
of the wing sections 18 and 18a and the rear edge of the central
section 16 of the table-top surface 12 for engaging the bottom
portion of the leaf 24 and holding the leaf in abutment with the
central section 16 of the table-top surface 12.
The convertible desk and conference table 10 is changed from the
desk configuration to the conference table configuration by
grasping the recessed portion 38 of the leaf 24 and moving the leaf
rearwardly along the guides 22 and 22a to the camming ramps 26 and
26a. As the leaf 24 continues to be moved rearwardly the camming
ramps 26 and 26a raise the leaf 24 upward to the table-top surface
12. When the leaf achieves the position shown in phantom in FIG. 5
and indicated by the numeral 24', a downward force is applied to
the leading edge of the leaf to rock the leaf on elevated portions
27 and 27a adjacent the camming ramps 26 and 26a, respectively. The
leaf 24 can also be lifted from below to aid in raising the
trailing edge of the leaf. The leaf 24 is then moved forwardly and
the tenons 42 in the trailing edge of the leaf mate with the
mortises 40 in the central section 16 of the table-top surface 12.
Thus, in the conference table configuration of the convertible desk
and conference table 10, the leaf 24 is supported by the elevated
portions 27 and 27a, and the mortises 40 and tenons 42 which form
the support means for holding the leaf 24 in abutment with the
central section 16 of the table-top surface 12.
The convertible desk and conference table 10 is returned from the
conference table configuration to the desk configuration by moving
the leaf 24 rearwardly to disengage the moritses 40 from the tenons
42, and lowering the trailing edge of the leaf 24 to the guides 22
and 22a. The leaf 24 is then moved forwardly along the guides 22
and 22a and is lowered by the camming ramps 26 and 26a. The forward
movement of the leaf 24 along the guides 22 and 22a continues until
the leaf is in place beneath the central section 16 of the
table-top surface 12.
It is to be understood that various modifications can be made to
the disclosed convertible desk and conference table without
departing from the scope of the invention, and it is intended to
cover in the appended claims all such modifications as fall within
the true spirit and scope of the invention.
* * * * *