вход по аккаунту


Патент USA US2116698

код для вставки
May 10, 1938.
H |-|_ HALL
‘ 2,116,698
Filed June 1, 1936
2 Sheets-Sheet l
/%7/FVF)’/7f /%zu
May 10, 1938.
Filed June 1, 1936
2 Sheets-Sheet 2
wdgt/ATTORNEY. ’
Patented May 10, 1938
Harvey H. Hall, Denver, Colo.
Application June 1, 1.936, Serial No. 82,735
2 Claims.
for controlling such a bed.
Another object of the invention is to provide an
efficient, light weight, easily installed device which
outward but allows it to swing inward.
ated folding wall bed and has for its principal
object the provision of a highly efficient and safe
mechanism for opening and closing the bed, which
5 will eliminate the complicated and expensive oper
ating screws, cranks, levers, etc., usually employed
10 will open and close a wall bed without manual
exertion; which can be stopped, started, or re
versed at any position in its travel; which, should
the electrical supply be interrupted for any reason,
can be quickly and easily adapted for manual
operation; and which, cannot be operated while
a person is upon the bed.
Other objects and advantages reside in the de
tail construction of the invention, which is
designed for simplicity, economy, and efficiency.
(C1. 5—133)
upwardly to form a rigid head frame Hi. The
head frame is‘ solidly braced from the spring frame
iii by means of suitable rigid braces I1. The head
frame I6 is relatively low and does not project
above the usual mattress when the latter is in
place on the springs 13. A head board I8 is
pivoted to the rigid frame I6,‘ as indicated at I9.
The frame It prevents the head l8 from swinging
This invention relates to an electrically oper
These will become more apparent from the follow
ing description.
In the following detailed description of the in~
vention reference is had to the accompanying
drawings which form a part hereof. Like nu
merals refer to like parts in all views of the draw
ings and throughout the description.
In the drawings:
Fig. 1 is a side elevation of the improved bed in
place in a wall niche.
This view is taken on the
line 2-—2, Fig. 3. The bed, however, is shown
in the elevated or closed position.
Fig. 2 is a similar View illustrating the bed in
the open position.
Fig. 3 is a plan View of the head portion of the
bed, taken on the line 3-—3, Fig. 2.
Fig. 4 is an enlarged detail section taken on
the line 4-—4, Fig. 3.
Fig. 5 is a similarly enlarged view, taken on the
line 5-5, Fig. 3.
Fig. 6 is a diagram of the wiring system of the
improved bed.
Fig. 7 is a face View of the control switch.
The bed is arranged for position in a niche or
compartment i0 formed in the wall of the room.
The compartment may be formed with a door
casing l I upon which suitable doors may be
mounted for enclosing the bed when in the closed
The improved bed comprises a spring frame l2
of angle iron or any other suitable material for
supporting the usual bed springs 53.
of the bed, the usual ornamental foot
rigidly secured to the frame !2, and a
l5 are also hingedly suspended from
the frame I2. At the head, the frame
At the foot
board Hi is
pair‘ of legs
the foot of
i2 is turned
The head of the bed is supported by means of 10
a hinged diagonal brace 20 vat each side. The
braces 2i) extend from pivots 2| at their upper ex
tremities to pivots 22 at their lower extremities.
The pivots 22 are mounted in guide castings 23
which extend upwardly at each side of the head
and are secured to the side walls of the compart
ment H). The guide castings 23 are formed with
vertical roller tracks 24 and the head of the frame
i2 is provided with roller studs 25 which travel
in the tracks 24 as the ‘bed is raised and lowered.
The raising and lowering is accomplished by
means of an electric motor 26 which rotates a
cross shaft 21 through a medium of a worm drive
transmission 23. The cross shaft is mounted in
two bearing blocks 29, there being one block ad
jacent each extremity of the shaft 21, upon which
a pair of ?exible cables 3! are alternately wound
and unwound.
Each cable is secured at its one extremity to its
spool 33 and at its other extremity to a cable bar 30
32. The cable bars 32 are removably attached to
the rigid head frames It by means of wing nuts 33
and extend upwardly from the rigid head "3 to a
connection with a cable 3|.
A spring tube 34 is secured in and extends up. 35
wardly from each of the bearing blocks 29. The i
upper extremity of each of the spring tubes is
longitudinally slotted, as indicated at 35, to ex
pose a compression spring 36 contained within the
tube. A pair of spring levers 3'! is secured to
the rigid head I6, there being one of the levers 31
in alignment with each of the spring tubes 34 so
that the upper extremity of the lever will enter the
slot 35 and compress the spring 36 when the bed
is closed.
The motor 26 is automatically stopped at each
extremity of movement of the bed by means of a
“three-way” switch 4| of the toggle type. The
operating lever of the switch 4! is connected
through a ?exible member 42 with the rigid head
frame I6 so that as the bed reaches its lowermost
position the toggle is snapped upwardly and as the
bed reaches its raised position the toggle is
snapped downwardly. The motor is manually
started by means of control switch 39 which may 55
be located in a convenient position on the com
partment casing ||. The face of the control
switch is shown in Fig. '7.
A suggested circuit diagram of the electrical
connections to the driving motor is illustrated
in Fig. 6. In this diagram the main feed wires
are indicated at 38. One of the feed wires leads
directly to armature of the motor 26. The sec
ond feed wire is in series with an electric over
~10 load circuit breaker 40. The control switch 39
is of the three-pole, double-throw type. One
of the poles, indicated at 43, cooperates with the
switch 4| to form a three-way control circuit
44 so that after the switch 4| has broken the
i. . L1 circuit to the motor it can be again closed
by swinging the pole 43 in the opposite direction.
The second feed leads through the overload cir
cuit breaker 4D and the three-way circuit 44 to
the motor.
The remaining two poles of the switch 39 are
employed to reverse the current ?ow relation
between the motor armature and ?eld so as to re
verse the direction of rotation of the motor.
Let us assume that the bed is in the open
position of Fig. 2 and that it is desired to fold
it into the compartment | 0. The operator throws
the reversing switch 35 to the “up” position.
This completes the circuit through the three
way switch 4| and the pole 43 to the motor 26
and also connects the armature-?eld circuit
of the motor to cause the latter to rotate in the
proper direction to elevate the bed.
The motor drives the shaft 21 so as to cause
the cables 3| to be reeled upon the spools‘ 30.
The cables pull downwardly upon the head of
the frame I2, causing the roller studs 25 to travel
downwardly in their tracks 24.
The braces 2|]
act as fulcrums so that as the head moves down
wardly, the foot will move upwardly. This action
l2 passes into the
compartment past the dead center position of
the brace pivots 2| and 22. As the bed ap
proaches this dead center position, the levers 31
enter the slots 35 and compress the springs 36
which act as a cushion to stop the motion of the
bed. This also causes the ?exible member 42 to
actuate the three-way switch 4| to the open side
40 continues until the frame
of the circuit 44 thereby stopping the motor 26.
When the motor stops the springs 36 remain
50 under compression.
When it is desired to lower the bed, the con
trol switch 39 is thrown to the “down” position,
which causes the current to ?ow through the
closed side of the three way circuit 44 to the
.motor so that the shaft 2'! will be rotated in the
reverse direction. This unreels the cable 3|.
Since the cables 3| can not exert a pushing ac
tion to force the bed over the dead center posi
tion to the point where gravity will operate there
60 on, the springs 36 are provided. These springs
will expand as soon as the cables 3| begin to
relax so as to push upon the levers 2'! upwardly
to swing the frame |2 outwardly past the dead
center position. The weight of the bed will then
65 keep the cables taut as they unreel.
The legs l5 are actuated solely by gravity to
swing to the suspended or supporting positions.
The head of the bed l8 cannot move backwardly
since it is prevented by the rigid portion |B. A
loose ?exible spring 43 constantly pulls the head
backwardly so that when the bed folds it will be
drawn to the position of Fig. 1 against the back
wall of the compartment Hi.
It is desired to call attention to the overload
circuit breaker 4!]. This may be any of the
standard types for opening an electric circuit
when the load thereon reaches a certain pre
determined quantity. This circuit breaker is set
so that it will open the circuit should the weight
to be lifted by the motor exceed the normal
weight of the bed and bedding and acts as a
safety to prevent the bed from being accidentally 15
or intentionally closed while occupied.
It is also desired to call attention to the re
movable cable bars 32. It might happen that the
electrical supply would fail when it became de~
sirable to lower the bed. In such a case, the wing 20
nuts 33 could be removed to release the bars 32
and their cables so that the bed could be raised
or lowered by hand.
While a speci?c form of the improvement has
been described and illustrated herein, it is desired 25
to be understood that the same may be varied,
within the scope of the appended claims, with
out departing from the spirit of the invention.
Having thus described the invention, what is
claimed and desired secured by Letters Patent
1. An electrically operated folding bed com
prising: a bed frame; means for hingedly sup
porting said frame so that it can swing upwardly
from open to folded position; electricallyoperated 35
means for elevating said frame to the latter posi
tion; levers projecting from said frame; spring
tubes positioned in the paths of said levers and
provided with slots for the reception of said
levers and springs contained within said tubes to 40
be compressed by said levers as said bed frame
reaches its fully elevated position.
2. An electrically operated folding bed com
prising a bed frame, a fulcrum tiltably mounting
the frame at a point in advance of the head 45
end thereof for vertical swinging movement from
a lowered horizontal position to a raised vertical
position, vertical guides slidably engaged by the
head end of the bed frame back of its points of
pivotal mounting for guiding the bed frame dur 50
ing its swinging movement, a rotatably mounted
shaft extending transversely of the bed adjacent
lower ends of the guides at the head end of the
bed frame, bars disposed vertically against the
rear face of the head of the bed frame and de
tachably secured adjacent opposite sides of the
bed frame at a point above the fulcrum when
the bed frame is in its lowered position, reels
carried by said shaft, ?exible members wound
upon said reels and extending upwardly and 60
secured to said bars, and an electric motor for
rotating said shaft to wind the ?exible mem
bers upon the reels and exerting pull upon the
head end of the bed frame to swing the bed to
the raised position.
Без категории
Размер файла
437 Кб
Пожаловаться на содержимое документа