U.S. patent number 3,786,765 [Application Number 05/230,001] was granted by the patent office on 1974-01-22 for carrel construction.
This patent grant is currently assigned to Howe Folding Furniture, Incorporated. Invention is credited to Alan Carleton Burr.
United States Patent |
3,786,765 |
Burr |
January 22, 1974 |
CARREL CONSTRUCTION
Abstract
Carrel system support framework comprising pairs of uprights and
interconnecting cross members, is formed by inserting through the
uprights pins with circumferentially grooved ends adapted to enter
and engage the end of an opposed cross member or members; one or
more horizontal planar members are supported in cantilever fashion
from a cross member by hook and slot interconnections; backs with
laterally protruding headed hanger pins are hung between pairs of
uprights the upper ends of which are slotted to receive the hanger
pins; side panels each with a headed hanger pin projecting from one
end are supported from the uprights respectively by inserting the
hanger pins in other slots in the upper ends of the uprights; and
shelves with recessed ends are supported by and between spring-wire
brackets which are assembled in opposed relation on the opposed
faces of a pair of side panels, or a side panel and a back of one
carrel which is acting as a side panel of another carrel.
Inventors: |
Burr; Alan Carleton (East
Norwalk, CT) |
Assignee: |
Howe Folding Furniture,
Incorporated (New York, NY)
|
Family
ID: |
22863562 |
Appl.
No.: |
05/230,001 |
Filed: |
February 28, 1972 |
Current U.S.
Class: |
108/60; 312/108;
312/196; 312/111; 312/257.1 |
Current CPC
Class: |
A47B
47/00 (20130101); F16B 12/10 (20130101) |
Current International
Class: |
A47B
39/00 (20060101); A47B 47/00 (20060101); F16B
12/10 (20060101); F16B 12/00 (20060101); A47b
057/00 (); F16b 012/00 () |
Field of
Search: |
;312/108,111,140,196,257
;108/60,61,91,107,114,148 ;287/56,127,8.36DT ;211/148,176,177
;52/281,282,285 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Gilliam; Paul R.
Claims
I claim:
1. A system for forming selectively any of a number of differently
shaped carrel clusters which comprises, in combination,
at least a plurality of upright tubular support members each having
a horizontally extending base member, each of said upright members
having two pairs of holes extending through it at the same level,
the holes of each pair extending in alignment through opposite
faces of the support member,
a number of pairs of cross pins each adapted for insertion through
a pair of said aligned holes in a support member for intersecting
disposition with their ends extending beyond opposed faces of the
support,
one or more stretcher members each adapted to space apart a pair of
upright supports and to cooperate with said pins for
interconnection to the pair of upright supports between which it is
disposed, means attached to said stretcher members for receiving
said cross pins, and means to provide clearance between said cross
pins at their intersections,
each of said support members having four hanger-bolt receiving
slots equally spaced apart around its top and extending downwardly
a distance from the top thereof,
one or more members adapted to serve either as the back panel or
one of the sides of the carrel, each said member having a headed
hanger-bolt projeting outwardly from its outer ends, the heads of
the hanger-bolts being spaced from the ends of each of said members
sufficiently to allow the shank of a hanger-bolt to be dropped into
one of the slots in a support member with the head of the
hanger-bolt disposed behind the slot,
one or more carrel side members similar to the back members and
each said side member having a headed hanger-bolt projecting
outwardly from only one of its ends in position to be dropped into
one of the slots in a support member with the head of the
hanger-bolt behind the slot,
one or more horizontal planar members each adapted to be disposed
in a horizontal plane in front of one of the assembled back members
and between two opposed side members, or a side member and a back
member which is serving as a side member,
each of said stretcher members and each of said horizontal planar
members comprising means which are coactive, one with the other, to
interengage and support the horizontal planar member in cantilever
fashion in a horizontal shelf plane.
2. The system defined in claim 1 including a plurality of spring
wire members for interconnecting one or more additional horizontal
planar members to side members and/or a back member employed as a
side member, each spring wire member having end portions bent so
that they extend in the same direction in parallel relation and an
intermediate portion curving outwardly from the inner ends of the
end portions respectively in the direction of a line joining the
outer ends of the said end portions, each side member and each back
member being provided with spaced holes to receive the ends of a
spring wire member to support the spring wire members in a
horizontal position, the end edges of each said additional
horizontal planar member being provided with reentry grooves
contoured to correspond to the curvature of the intermediate
portion of a spring wire member, whereby, when an additional
horizontal planar member is inserted between two side members or a
side member and a back member serving as a side member, on a level
with opposed spring wire members mounted on said side members, or a
side member and a back member serving as a side member, the spring
wire members will be first deformed and will then spring into the
said reentry grooves in the ends of an additional horizontal planar
member and be fully engaged therein.
3. The combination of claim 1 and interchangeable foot members
having means adapted to coact with means at the lower end of each
upright support member for attachment to the upright support
members respectively disposed so as to extend outwardly from the
lower ends of upright support members respectively under each
cantilever supported shelf.
4. In a system as defined in claim 1 a foot member comprising an
elongated bar, a tenion tongue formed on one end of said bar, a
mortise opening formed in the lower end of an upright support, and
a screw support threadably insertable through said combined mortise
and tenion for joining the same while simultaneously serving as a
level adjusting foot support.
5. The carrel system defined in claim 1 in which the upper edges of
the stretcher members define channels to receive the lower edges of
the back panel members respectively and the back panel members are
supported above the stretchers respectively and in the same
vertical plane, with the lower edges of the back panel members
extending down into the channels defined by the stretcher
members.
6. The combination claimed in claim 1 in which the upright members
are tubular and are formed with one or more pairs of diametrically
aligned holes, the ends of the stretcher members define holes, and
cross pins are provided for interconnecting the ends of the
stretcher members to the upright support members respectively, the
pins being of uniform diameter and provided with circumferential
grooves adapted respectively to receive and interengage with the
walls of the upright members and the ends of the stretcher members
respectively.
7. The structure claimed in claim 6 in which the tubular uprights
are provided with diametrically opposed holes extending in one
vertical plane and other diametrically aligned holes extending in a
plane at right angles to the first mentioned plane, and the pins
have intermediate portions which are reduced in diameter and are
half round so that the intermediate portion of each pin defines a
flat face whereby pins may be inserted through the tubular uprights
in the same plane and disposed at right angles with the flat face
of one pin in abutting relation to the flat face of another pin
normal to it.
Description
FIELD OF THE INVENTION
This invention relates to a carrel system and structure comprising
parts which are preformed in such a way that a single carrel, and
clusters and groupings of carrels may be assembled quickly and
easily and with a minimum number of parts. The parts are so
preformed that they may be assembled in the same way and without
modification regardless of whether they are employed to form
carrels arranged side by side, or back to back, or with one carrel
disposed at a right angle to another.
In prior art carrel knockdown structure workmen when assembling a
cluster of carrels had to prepare parts at the place of assembly to
conform to the disposition of the carrels within a cluster, and if
a change in design of a cluster was decided upon at least some of
the parts had to be reprepared before they could be reassembled in
the new design. Thus, for example, in one prior art type of
structure hooks for engaging and supporting stretchers were
attached at the place of assembly to particular faces of uprights,
the particular face or faces depending upon the grouping of carrels
which was desired. If two or more carrels were to be assembled side
by side the workmen would attach the hooks to particular faces of
the uprights, but if carrels were to be assembled back to back some
of the hooks would have to be moved to other faces of the
uprights.
By the structure disclosed herein the interengagement of the parts
of a single carrel assembly and especially of a cluster or grouping
of carrels is greatly simplified and the inventory of parts which a
school or other user has to have on hand is reduced to a
minimum.
This invention will be best understood by reading the following
description in connection with the drawings in which,
FIG. 1 is a perspective view of a carrel structure embodying the
invention with the parts in exploded relation,
FIG. 2 shows a pair of carrels in full lines in side by side
relation, with another pair of carrels, indicated in dotted lines,
disposed in back to back relation to them,
FIG. 3 shows an assembly of four carrels with each carrel disposed
at a right angle with respect to two of the other carrels, in a
pinwheel arrangement,
FIG. 4 shows another arrangement of carrels disposed at a right
angle one to another in diagonal rows,
FIG. 5 is a top plan view partly in section showing one end of a
cross member or stretcher connected to an upright by a pin and
retainer ring assembly, with a side panel projecting from the
upright at right angles to the stretcher, and with a spring-wire
bracket projecting from its inner face into the recessed edge of a
shelf which it is supporting,
FIG. 6 is a top plan view showing the upper end of an upright
formed with four downwardly extending slots spaced apart angularly
by 90.degree., with an end of a back panel supported from the
upright by means of a hanger pin seated in one of the slots of the
uprights with its head disposed on the inside of the upright, and
also showing a side panel similarly supported and extending at
right angles to the back panel,
FIG. 7 is a front elevation partly broken away showing one end of a
stretcher supported from an upright by means of a pair of
interconnecting pins of special design which is the subject of
copending application Ser. No. 230,003 filed Feb. 28, 1972 and also
showing the stretcher provided with an opening in its face and a
slot in its lower edge, and a hook-like attaching bracket which
extends rearwardly from a horizontal planar member and is inserted
through the opening and the slot in the stretcher and serves to
support the horizontal planar in cantilever fashion, and also
showing how the horizontal planar when in assembled position may be
interconnected with a panel by means of a screw or bolt,
FIG. 8 is an exploded view showing three stretchers disposed in
relation to a four-sided tubular upright, each stretcher being
formed with end plates which are apertured to receive pins passed
through aligned sets of holes in the upright and also showing a
foot member adapted to be detachably engaged at the lower end of
the upright and extending in the opposite direction from a foot
member which may be formed integrally with the upright,
FIG. 9 is a front elevation of a vertical section through the
upright showing a pair of stretchers supported from opposite faces
of the upright by a pair of interconnecting pins, and showing
retainer rings disposed on the interconnecting pins respectively in
a manner diferent from that illustrated in FIG. 7 where the pins
are supporting only one stretcher; this figure also shows in cross
section a pair of pins extending through the upright at right
angles to the pins which are interconnecting the opposed pair of
stretchers, with the cross pins, because of the special
construction of the pins being disposed at the same levels and in
the same horizontal planes as the respective first mentioned pair
of pins, and,
FIG. 10 is a top plan view taken on the lines 10--10 of FIG. 9
showing a pair of interconnecting pins disposed at right angles and
extending through the upright at the same level, with each end of
each pin being connected to a stretcher, so that in this
arrangement four stretchers extend from four different faces of an
upright thus indicating a disposition of four carrels in a pinwheel
cluster such as is shown in FIG. 3.
DESCRIPTION
As shown in the illustrated preferred embodiment of the invention
the elements of a single carrel structure made in accordance with
the invention comprise two upright support members 10 which are
tubular and substantially square in cross section. Extending in one
direction from the uprights at their lower ends are the foot
members 12 which may be integral with the uprights and may be
mounted on adjustable glides 14 by means of which compensation for
unevenness in a floor surface may be made. One of the glides is
aligned with an upright 10 and may serve for the attachment to the
upright of another foot member 16 by being inserted through a hole
17 (FIG. 8) provided in finger means 18 projecting from one end of
foot member 16 and received in an opening 19 provided for in the
lower end of the uprights.
The horizontal planar and side panels of a single carrel are
supported in cantilever fashion and extend in the same direction as
the feet 12. The additional feet 16 are employed when a pair of
carrels is constructed in back to back relation.
Each of the uprights 10 is formed with slots 20 extending
downwardly from the top in all faces of the upright. At a lower
level below the slots 20 the uprights are provided with one or more
pairs of holes 22 aligned horizontally. Through these pairs of
holes pins 24 are inserted to engage and support stretcher members
26 by which a pair of uprights 10 are spaced apart and
interconnected.
The stretchers 26 may also serve as wireways through which
electrical conduits may be led for attachment for example to
electrical apparatus such as a film projector or a sound
reproducing device, or to lighting means. It will be noted that in
the uprights 10 between upper and lower pin receiving holes 22
larger apertures 28 are provided through which if desired
conductors may be led up inside the uprights from their lower ends
and may be directed into apertures provided in the ends of the
stretcher-wireways 26. The use of cross members or stretchers 26 as
wireways is well known and forms no part of this invention.
Within each stretcher member or cross member 26, adjacent to each
end but spaced inwardly from the ends, vertical end plates 30 are
provided, as is shown in FIGS. 7-10, and each end plate is
apertured to receive one or more pins 24 which have been inserted
through horizontally aligned holes 22 in an upright 10. Preferably
the pin receiving apertures in the end plates 30 take the form of
keyhole slots, as shown in FIG. 8. For attachment to an upright 10
an end of a stretcher 26 is brought into alignment with the
projecting end of a pin or pins projecting from the upright, and
after receiving the projecting end of the pin or pins in the larger
portion of an opposed keyhole slot or keyhole slots the stretcher
end is lowered allowing the projecting end of the pin or pins to
enter the narrow end of the keyhole slot or slots where the edge of
the portion of the end plate defining the slot or slots enters a
circumferential groove provided in the surface of the opposed pin
or pins, thereby interengaging the stretcher with the pin or pins.
The plates 30 are spaced inwardly from the ends of a stretcher
sufficiently so that when the end plate has become seated in a
groove in the projecting pin means the end portion of the stretcher
extending beyond the cross plate will extend to, and be in abutting
relation with a face of the upright.
After a pair of stretchers has been interconnected to and between a
pair of uprights the next step in assembling a carrel is to attach
a horizontal planar member and this is done by inserting hook-like
means 34, which project rearwardly from each top, into pairs of
slots 36 and 38 provided in the face and in the bottom of the
stretcher 26. As is best seen in FIG. 1 each horizontal planar
member 40 comes equipped with a pair of angle brackets 42 depending
from its lower surface adjacent its ends respectively, and the
upper, horizontal flanges 42a of these brackets are extended
rearwardly and bent downwardly to provide first an inclined portion
and then a portion disposed at a right angle to the flange 42a,
forming a hook-like member which when inserted through a slot 36 in
a face of the cross member 26 and then downwardly into a slot 38 in
the bottom of the cross member, serve to position the horizontal
planar member 40 in a horizontal plane, extending at a right angle
with respect to the stretcher member 26. The horizontal planar
member is thus supported in cantilever fashion.
In the assembly the next step is to attach the side panels 48. The
side panels are alike in structure and each has extending from one
end a hanger pin 50 which may be essentially a lag screw with a
washer-like head 58 disposed on the shank of the screw in abutting
relation to the polyagonal head 60 of the lag screw. For shipment
the lag screws may be fully screwed into the side panels
respectively but at the time of assembly they are unscrewed
slightly to provide a space between the end of the panel and the
head 58 to enable the shank of the lag screw to be inserted in a
slot 20 in the upright with the enlarged head of the hanger pin
disposed inside the upright, in abutting relation to the inner
surface of the upright. In this way a pair of side panels are
quickly placed in position and are supported in cantilever fashion
extending along the ends of the horizontal planar member 40.
Each of the side panels 48, and each of the vertical flanges of
brackets 42 depending from the horizontal planar member 40, are
formed with holes which, when the top and side panels are in place,
come into alignment, and bolts 64 may be inserted through the pairs
of aligne holes to tighten the assembly.
The backs 70 are next assembled. They are provided with hanger
bolts 72, projecting from each end of the back. The hanger bolts 72
may be similar to the hanger bolts 56 which project from an end of
each side panel and are described above. The back is quickly placed
in position by dropping the hanger bolts 72 into the slots 20 of
opposed pairs of uprights. The upper edges 74 of the stretchers are
channel shaped and when a back 70 is lowered into position by
insertion of the hanger pins into opposed slots 20 in an opposed
pair of uprights 10, the lower edge portion of the back is aligned
with the upper edge of the stretcher and enters the channel 74,
thus giving further support and stability to the lower end of the
back.
A basic carrel is now assembled. However a shelf is usually desired
as part of a carrel assembly and shelves 80 are provided the ends
of which are recessed with recesses 82 shaped to conform to the
contour of opposed spring wire brackets 84 which are bail shaped
and are mounted on the opposed faces of opposed pairs of side
panels by inserting the bent over end portions 86 of the brackets
in preformed holes 88 provided in the side panels respectively. The
holes 86 are deep enough so that a bracket 84 may be mounted on
each face of a side panel, as for example when a pair of carrels
are assembled in side by side relation, in which case the
intermediate side panel will be common to both of the carrels.
After a pair of spring wire brackets are positioned a shelf may be
quickly placed in position by holding the shelf in horizontal
position and moving it against the forward ends of the supporting
brackets which enter and become engaged in the sculptured ends of
the shelf providing a firm support for the shelf.
In some carrel assemblies, such for example as shown in FIG. 3 and
4, a back panel of one carrel may be employed as a side panel of a
adjoining carrel and for this reason holes 88 for mounting brackets
84 are also provided extending through the back panels. These holes
are not visible in an assembled carrel as they are hidden by a
shelf.
When two carrels are arranged in back to back position there is a
back panel and a cross member or stretcher which are common to two
carrels. In order to be available for this use stretchers may be
made so that they are similarly apertured in both faces and also
provided with two sets of slots in its lower edge to receive the
hook-like members projecting rearwardly from the tops and support
the tops projecting from it in opposite directions. Of course when
carrels are disposed in back to back position the detachable foot
members 16 are attached to the uprights and extend in the same
directions as one of the horizontal planar members.
Difficulty is often encountered in inserting a screw member such as
the hanger pins 50 and 72 in the edgees of panels made of plastic,
powdered wood and the like without expanding and splitting the
panel and accordingly in preparing the side panels and the back
panels of this assembly the hanger pins are preferably inserted in
the manner described and claimed in copending patent application
Ser. No. 230,002 filed Feb. 28, 1972.
For some carrel clusters such for example as those shown in FIG. 3,
the middle upright 10a may support the abutting ends of four
stretchers projecting outwardly from the four faces of the upright
and therefore spaced from one another by rotary angles of ninety
degrees. For supporting three or four stretcher ends from the same
upright and at the same level preferably pins are emmployed of the
kind described and claimed in my copending patent application, Ser.
No. 230,003 filed Feb. 28, 1972. Such pins are indicated in FIGS.
8, 9 and 10. They are not only grooved circumferentially at each
end to engage edge portions of the end plates of opposed
stretchers, but the pins are also formed so that one pin may be
crossed over another and inserted through an upright at right
angles to the other pin and in the same plane. To accomplish this
each pin 24 is provided with a portion 90 of reduced diameter, of
predetermined length and disposed between the ends of the pin so as
to provide a short end portion 92 of full diameter and a longer end
portion 94 of full diameter. When two pins are to be inserted
through an upright at the same level one pin is first inserted
through a pair of horizontally aligned holes 22 with the longer end
portion 94 of the pin as the leading end. The other pin is then
inserted through a set of cross holes 22 which are disposed at
right angles to the set of holes through which the first pin is
inserted, with the short end portion 92 of the pin as the leading
end. The provision of a short end portion 92 followed by a long
reduced portion 90 enables the second pin to be inserted into the
upright at an angle and moved forward at the angle until the short
end passes over the reduced portion 90 of the first inserted pin,
after which the second pin may be lowered to a straight line
position so that its leading end portion 92 can be aligned with,
and inserted through, the opposed hole 22 in the far side of the
upright, since, after the end portion 92 of the second pin passes
over the first pin, its reduced portion 90 will be disposed against
and slide over the reduced portion 90 of the other pin, allowing
both pins to be disposed in the same plane.
For making a pin 24 adapted when inserted through an upright to
engage and support a stretcher from one face of the upright, or
from two opposite faces of the upright, the short end portion of
the pin is provided with a single groove g-1 and the long end
portion 92 is provided with two circumferential and axially spaced
grooves g-2 and g-3. When the pin is to be used to support only one
stretcher it will be inserted through an upright 10 to the extent
illustrated in FIG. 7, and the inner groove g-3 of the pair of
grooves in the end portion 94 is used to engage the slot defining
edge portion of the plate 30 in the opposed end of the stretcher, a
retainer ring 96 may be placed in groove g-1 in the shorter end
portion of the pin, in abutting relation to the outer face of the
upright 10, the function of ring g-6 being to hold the pin in the
desired position and prevent it from moving axially in the
direction of the longer end portion 94, which might result in
detachment of the stretcher from the upright.
When stretchers are to be supported from opposite faces of an
upright the pins 24 are disposed projecting equal distances beyond
the opposed faces of the upright, and the groove g-2 is used to
engage the opposed stretcher end plate 30 of one stretcher end, the
plate 30 of the oppositely extending stretcher is engaged in groove
g-1, and the retaining ring 96 is placed in groove g-3, as is shown
in FIG. 7, 9 and 10.
By means of the coacting attachment means provided herein,
including the slots 20 from the tops of the upright members and the
hanger pins 72 projecting from the ends of the backs; the slots 20
in the uprights and the hanger pins 56 projecting from one edge of
the side panels; the interconnecting pins 24 coacting with the slot
defining edge portions of the plates 30 at the respective ends of
the stretchers; the spring wire brackets, and the means for
mounting them on one or both sides of the side panels and in some
instances from one face of a back which is serving as a side panel
in some of the cluster arrangements, coacting with the shelf
members having sculptured ends to receive and interengage with the
said spring wire brackets; and the provision of demountable foot
members 16 which may be quickly added to help provide carrel
clusters of various groupings, the parts needed to form one carrel,
or several carrels arranged in clusters of different shapes and
designs, may be quickly assembled on the spot where needed with a
minimum of time and effort.
If desired the hanger pins of the back and the side panels may be
tightened up after they have been dropped into the opposed slots 20
in the upright members and for this a box wrench may be employed.
If screws are used to interconnect the side flanges of brackets 42
depending from a top 40 with the opposed side panels, a screw
driver, preferably a phillips screw driver, may be employed, and
for making sure that the hanger pins of the back and side panels
are fully inserted in the grooves 20 in the uprights, and also for
making sure that the hook members 34 extending from the tops are
fully inserted in the coacting pairs of slots provided in a face
and in the bottom of the stretchers, a rubber mallet may be
employed. At the most only three tools, a screw driver, a wrench
and a rubber mallet are required for assembling the carrels.
It will be apparent that if desired carrels of different sizes can
be intermixed in a variety of arrangements.
If desired for improving the appearance of an assembled carrel or
carrels, the cap members 100 may be provided for fitting over the
grooved tops of the upright member 10, and the caps 102 may be
provided on the outer ends of the foot members.
* * * * *