U.S. patent number 3,882,554 [Application Number 05/433,232] was granted by the patent office on 1975-05-13 for retractable bed.
Invention is credited to Frederic E. Glass.
United States Patent |
3,882,554 |
Glass |
May 13, 1975 |
Retractable bed
Abstract
A retractable bed has a frame with pairs of legs standing
against opposite walls of a room and horizontal room spanning
members extending between tops of the legs against the ceiling of
the room, a bed platform, four retracting lines slidably extending
from the corners of the bed platform vertically upward to the
horizontal members, along the horizontal members, and downward at
one pair of legs, a counterweight adjacent to a pair of legs
attached to the retracting lines, four support lines extending from
the corners of the bed platform over pulleys at the tops of the
legs, and slack take-up weights at the ends of the support lines
over the pulleys limiting the travel of the support lines over the
pulleys and up slack in the support lines when the bed platform is
retracted upward to the horizontal members balanced by the
counterweight. The retracting lines pass over the pulleys mounted
on a single shaft disposed over the counterweight so that a sheave
and endless rope may rotate the shaft to raise and lower the bed
platform between retracted and sleeping positions.
Inventors: |
Glass; Frederic E. (New York,
NY) |
Family
ID: |
26996419 |
Appl.
No.: |
05/433,232 |
Filed: |
January 14, 1974 |
Related U.S. Patent Documents
|
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
|
349933 |
Apr 11, 1973 |
|
|
|
|
243311 |
Apr 12, 1972 |
|
|
|
|
Current U.S.
Class: |
5/10.1;
5/83.1 |
Current CPC
Class: |
A47C
17/84 (20130101) |
Current International
Class: |
A47C
17/00 (20060101); A47C 17/84 (20060101); A47c
017/40 () |
Field of
Search: |
;5/10,63,66,83,84 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Nunberg; Casmir A.
Attorney, Agent or Firm: Tailer; Peter L.
Parent Case Text
CROSS REFERENCES TO RELATED APPLICATIONS
This application is a continuation-in-part of my patent application
Ser. No. 349,933 filed Apr. 11, 1973, which, in turn, is a
continuation-in-part of my patent application Ser. No. 243,311
filed Apr. 12, 1972 both now abandoned.
Claims
I claim:
1. A retractable bed comprising, in combination, a frame having
transverse members and two pairs of legs supporting the ends of
said transverse members to span a room adjacent to the ceiling, a
bed platform smaller than the span of said room, support lines
fixed to the cornes of said bed platform, pulley means at the ends
of said transverse members over which said support lines run, slack
take-up weights on said support lines beyond said pulley means
limiting travel of said support lines over said pulley means
securing said bed platform in a lowe sleeping position with said
support lines extending upward and outward from the corners of said
bed platform to said pulley means at the ends of said transverse
members, four retracting lines extending vertically upward to said
transverse members from the corners of said bed platform and
extending slidably along said transverse members to extend downward
adjacent to one pair of said legs, and a counterweight fixed to
said retracting lines substantially balancing the weight of said
bed platform as said platform is retracted upward against the
ceiling, said slack takeup weights taking up slack in said support
lines as said bed platform is retracted.
2. The combination according to claim 1 wherein said transverse
members each have a central member and two end members telescoping
into the ends of said central member to fixed therein to span a
room.
3. The combination according to claim 2 wherein said central member
are the length of one dimension of siad bed platform, and with the
addition of central assemblies containing pulleys over which said
retracting lines run, said central assemblies being fixed at the
ends of said central members and wherein said legs have screw jacks
at their lower ends jamming said frame between floor and
ceiling.
4. The combination according to claim 1 with the addition of a
shaft journalled at one end of said transverse membes, said shaft
having sheaves mounted thereon over which said retracting lines run
and from which said counterweight hangs.
5. The combination according to claim 4 with the addition of a
single sheave mounted on said shaft, and an endless loop disposed
over said single sheave, pulling said loop rotating said shaft
retracting and lowering said bed platform.
6. The combination according to claim 1 wherein said legs are
tubular and said pulley means are at the tops of said legs, said
slack take-up weights hanging from said support lines within said
tubular legs.
7. The combination according to claim 1 wherein said counterweight
is an elongated flat weight hanging between a pair of said
legs.
8. The combination according to claim 1 with the addition of first
and second sheaves independently journalled at the ends of said
transverse members over which said retracting lines run and from
which said counterweight hangs, and an elastically twistable shaft
connecting said first and second sheaves.
9. The combination according to claim 8 wherein said first and
second sheaves are between said transverse members and contain
pairs of aperture, and wherein said shaft has forked ends engaging
said pairs of apertures connecting said sheaves, and with the
addition of a single sheave mounted to rotate with said first
sheave, and an endless loop disposed over said single sheave so
that pulling said loop rotates said first and second sheaves
retracting and lowering said bed platform.
10. The combination according to claim 1 wherein said support lines
extend from the ends of said bed platform to said pulley means;
wherein said support lines cross at the ends of said bed platform;
and with the addition of compression members extending between the
ends of said transverse members of said frame.
Description
BACKGROUND OF THE INVENTION
Small modern apartments are difficult to furnish in a conventional
manner. A bed is particularly cumbersome as it remains a large
unfunctional unit when not in use. Conventional convertible sofa
beds cannot be made in light aesthetic forms. Thus there is a need
for the retractable bed of this invention which disappears against
the ceiling when not in use freeing all the floor space under
it.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a perspective view of the retractable bed of may
invention;
FIG. 2 is a perspective view of a fragment of the bed platform with
support and retracting lines attached thereto;
FIG. 3 is an exploded perspective view of a central pulley assembly
fixed to the broken away end of a center member of a horizontal
member with broken away ends of a transverse member and a
telescoping member positioned for assembly;
FIG. 4 is a perspective view of a support pulley assembly with a
support line passing therethrough having a take-up weight fixed to
the end of the support line;
FIG. 5 is a perspective view of a broken away end of the frame of
the retractable bed showing a counterweight suspended between a
pair of legs;
FIG. 6 is a perspective view of a lower end of a leg having a screw
adjuster fixed thereto and showing a cover removed therefrom;
FIG. 7 is a perspective view of a broken away end of a
counterweight holder;
FIG. 8 is a perspective view of a broken away end of a cover for
the holder of FIG. 7;
FIG. 9 is a perspective view of a broken away end of the frame of
the retractable bed with support and retraction lines removed
showing a modification thereof;
FIG. 10 is a side view of a flexible connecting rod;
FIG. 11 is a side view of a sheave modified to receive one end of
the connecting rod of FIG. 10; and
FIG. 12 is a perspective view of a modification of my retractable
bed.
DESCRIPTION OF THE PREFERRED EMBODIMENT
As shown in FIG. 1, the retractable bed of my invention has a frame
10 supported by its two pairs of legs 11. Extending between the
tops of the pairs of legs 11 are transverse member 12 each having a
central member 13 from which telescoping end members 14 and 15
extend. A bed platform 16 is supported in a lowered sleeping
position by four support lines 17 and is raised into a retracted
position by four vertical retracting lines 18 and 18' which are
fixed to counterweight 19.
As shown in FIGS. 4 and 5, support pulley assemblies 20 and 20'
have lower shanks 21 which fit into the tops of the tubular legs
11. The bodies 25 of assemblies 20 and 20' each contain a recess 22
within which a pulley 23 is journalled on an axle 24. A vertical
bore 26 extends upward from the bottom of each shank 21 to
communicate with a recess 22 so that each support line 17 can be
threaded up through bore 26 and recess 22 over a pulley 23. A slack
take-up weight 27 is fixed to the end of each support line 17 to
hang within a tubular leg 11. Thus weights 27 take up slack in the
support lines 17 as bed platform 16 is raised and the weights 27
are larger than the bores 26 so that they are stopped by shanks 21
to hold bed platform 16 at a desired sleeping level.
Horizontal shanks 29 projecting from the bodies 25 extend into the
ends of the tubular members 14 and 15. Resilient pads 30 are fixed
on top of the bodies 25 to bear against the ceiling of a room when
the bed of my invention is installed. Assemblies 20 and 20' are
identical except that assemblies 20' are journalled to receive a
shaft 28.
As shown in FIG. 3, central assemblies 31 are clamped on both ends
of each center member 13. The telescoping members 14 and 15 slide
within the members 13. The body 32 of each central assembly 31
contains a recess 33 within which a pulley 34 is journalled on a
bolt 35 which is turned axially into body 32. Further screwing of
bolt 35 into assembly 31 causes it to engage and deform the end of
a central member 13 to fix it within clamping frame 36 and lock a
member 14 or 15 from sliding within member 13. A passage aperture
37 is provided next to the top of pulley 34. This aperture 37 is
only used in one pair of assemblies 31 to accommodate a retracting
line 18'. A shank 38 receives the end of transverse channel 39
about it so that the channels 39 secure the transverse members 12 a
spaced distance apart.
As shown in FIG. 6, each leg 11 has a bottom plug 40 having a lower
flange 41 inserted upward within it. Plug 40 contains a threaded
aperture 42 to receive a screw jack 43 therein. Jack 43 has a foot
45 on which it is rotated by turning a nut 44 welded to it. Foot 45
has a resilient floor pad 46 fixed under it. A cover 47 slips about
the bottom of each leg 11 and is slid downward to hide screw 43.
The rear edges of cover 47 are cut away to accommodate a standard
baseboard of a room.
As may be seen in FIGS. 1 and 2, bed platform 16 is a frame having
sides 48 and ends 49 disposed about a mattress support board 50.
Cleats 51 and 52 or the like are used to adjustably secure lines
17, 18 and 18' to the corners of platform 16.
Referring again to FIG. 5, the support pulley assemblies 20' have
the shaft 28 journalled to extend through them. Two sheaves 53 are
fixed to shaft 28. Each sheave 53 contains two grooves to receive
the lines 18 and 18'. A single sheave 54 on one end of shaft 28 has
an endless loop of rope 55 pass over it so that pulling a run of
loop 55 will retract or lower bed platform 16.
As may be been in FIGS. 7 and 8, counterweight holder 60 has upper
and lower flanges 61 and 62 between which weights 63 are slipped to
balance the weight of platform 16 and any bedding thereon. Lines 18
and 18' are fixed to upper flange 61. Cover 64 has a top 65 and
ends 66 to completely conceal weights 63. Counterweight 19 remains
between a pair of legs 11 to take little space.
The retractable bed of my invention enjoys a number of advantages.
Since the bed platform 16 is supported in the lowered sleeping
position by lines 17, the only load these lines 17 impose on member
12 is in compression. The much lighter retraction load which only
includes the weight of platform 16 and bedding is taken by lines 18
and 18'. Only this lighter retraction load imposes a bending load
on member 12. Thus both members 12 and the entire frame 10 may be
fabricated from relatively light materials at a practical cost.
Further, the frame 10 can be elongated or shortened to span any
room as the members 14 and 15 telescope into the central member 13.
Elaborate cross bracing for rendering the frame 10 rigid is not
required as the screw jacks 43 jam and lock each leg in a fixed
position between the floor and ceiling. The pads 30 and 46 prevent
damage to an apartment and prevent the legs 11 from slipping. Since
the retractable bed is completely selfsupporting and does not need
to be bolted or otherwise fixed permanently in place, it may be
easily moved and it meets with the approval of landlords.
FIGS. 9-11 show a modification of this invention. Sheaves 53' and
53" are mounted to rotate independently on assemblies 20'.Sheave
53' has sheave 54' mounted to rotate with it, sheave 54' having an
endless loop of rope 55, as shown in FIG. 5, pass about it.
Sheaves 53' and 53" contain pairs of apertures 70. A connecting rod
71 has U-shaped forked ends 73 which enter the pairs of apertures
70. Rod 71 should be of three-sixteenth inch to one-fourth inch
steel to allow it to twist.
This modification functions as follows. If users sit on a side of
bed platform 16 as shown in FIG. 1, the support lines 17 on that
side may stretch to lower the loaded side so that the retracting
lines 18 and 18' on the low side slip over the sheave 20' on the
low side. This misaligns the retracting lines 17 so one side of the
platform 16 retracts higher than the other. With the above
modification, connecting rod 71 twists to accommodate any unequal
stretching of support lines 17 and then springs to realign the
sheaves 53' and 53" and evenly retract platform 16.
FIG. 12 shows a modification of my retractable bed in which the
support lines 17' are crossed at each end of the bed platform 16.
This modification prevents even gentle sideways swinging of the bed
platform 16 and thus stabilizes it against any substantial motion
in normal use. The crossed lines 17' tend to pull the assemblies 20
and 20' inwardly so that light compression members 80 and 81 should
be inserted between the pairs of assemblies 20 and 20'.
While my invention has been shown and described in the best forms
known, it will nevertheless be understood that this is purely
exemplary and that modifications may be made without departing from
the spirit of the invention.
* * * * *