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Патент USA US2136275

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Nov- 8. 1938-
2,136,275
A. M. COLEMAN ET AL
READY STOWING AND PRESENTING ‘FOR ACCESS OF SUCH ARTICLES AS
TYPEWRITERS, SEWING MACHINES, OR OTHER APPAR ATUS
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Filed Dec. 13, 1937
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47121
Nov. 8. 1938.
» A. M‘ COLEMAN ET AL
2,136,275
READY STOWING AND PRESENTING FOR ACCESS OF SUCH ARTICLES AS
TYPEWRITERS, SEWING MACHINES, OR OTHER APPARATUS
>
Filed Dec. 1:5,
193?
$9 ,
'
3 Sheets-Sheet 2
_Nov. 8, 1938.
A. M. com-:rvumv ET At '
2,136,275
READY STOWING AND PRESENTING FOR ACCESS OF SUCH ARTICLES AS
TYPEWRITERS, SEWING MACHINES, OR OTHER APPARATUS
'
Filed Dec. 13, 1937
5 Sheets-Sheet 5
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Patented Nov. 8, 1938
2,136,275
' UNITED STATES
PATENT OFFICE
2,136,275
READY STOWING AND' PRESENTING FOR
ACCESS OF SUCH ARTICLES‘ AS TYPE
WRITERS, SEWING MACHINES, OR OTHER
APPARATUS
Alfred Montague Coleman, Charles Claude Bater,
and George Arthur. Lee, London, England
Application December 13, 1937, Serial No. 179,616
In Great Britain October 17, 1936"
12 Claims‘.
This invention relates to means for enabling
articles such as typewriters, sewing machines, or
other apparatus to be stowed and presented for
access.
5
The invention has for an object the provision
of ’means for the above purpose, which are oper
able with little effort on the part of the user,
whilst occupying small space, whereby it may be
embodied in an article of furniture.
10
,
Another object of the invention is -to incor
porate in such means the important feature of
means for preventing its movement from one posi
tion to another, whilst the article, e. g. typewriter,
itself is in such a position or condition‘ that it
15 1might su?er damage through being moved.
A further object of the invention is to provide
means for the purpose stated, constructed as a
unitary structure, whereby it comprises a com
plete device easily ?ttable in an article of furni
20 ture, such as a pedestal of an of?ce desk.
In a
primary application of the invention the means
are adapted for mounting a typewriter so as to
enable it to be stowed in the space normally occu
pied in a desk pedestal by, say, two upper drawers,
25 and to be readily moved from that accommoda
tion to one outside the pedestal and at a reason
able height and rigidly supported and equally
capable of ‘being returned to its stowed position.
In the accompanying drawings an embodiment
30 of’ the means according to the present invention
is illustrated. The device shown is for use in
stowing and presenting for access a typewriter.
It will be appreciated, however, that the invention
is applicable to ‘other articles, machines, instru
35 ~ ments or the like, which are required sometimes
to be stowed and sometimes to be exposed and
raised for access, e. g. gramophone mechanism,
sewing machines, or maybe wash basins which
form part of ships cabin or like accommodation.
40 Normally the article to be stowed will be rested
on a movable platform which for convenience
will hereinafter be called the support.
' In the drawings:
Figure 1 is a cross section through a desk com
45 partment forming the housing for a typewriter
when stowed showing the device installed.
Figure 2 is an enlarged view showing the de
tails of the spring adjustment means.
Figure 3 is an enlarged fragmentary view show
50- ing the locking means for retaining the tray in
its extended and. raised positions, and a feeler
safety device.
56.
Figure 4 is a plan view of Figure 3.
Figure 5 shows in detail the slideway in which
the support is movable.
,
((1312-27)
Figure 6 is an enlarged-fragmentary view show
ing means‘ for preventing premature view and
sliding of the tray during lowering from the raised
position.
Figure 7 is a diagrammatic perspective view of
the device.‘
In Figure -1 there is shown a compartment ll!
of suf?cient dimensions to accommodate a type
writer generally indicated in broken lines at H.
The machine is carried on a tray l2, which is slid 10
ably carried between guides l3 and locked therein
by a catch not shown, which is releasable to allow
withdrawal of the-tray for cleaning and like pur
poses. In normal operation of the means the tray
is securely locked to the guides I3. The tray and 15
guides form a support for the typewriter, which
support is carried between the two inwardly op
posed U section channels l4 forming guides, there
being interposed between the guides l3 and chan~
nels l4 ball races comprising a- cage IS with balls 2,0
l6, as shown in Figure 5. By this arrangement
the comparatively effortless and smooth inward
andoutward movement of the support is obtained.
By using balls l6 of su?‘iciently small diameter
excessive movement of the cages I5 is prevented.
Stops are provided at each end of the channels
M to retain the cages, and the latter are con
nected to move together by a bar ISA.
To prevent any risev of the platform before its
complete withdrawaL'or outward horizontal slid
ing has been accomplished, there are attached
to the inside of the guide l3, i. e. to the type
301
writer support, downwardly extending legs 18
terminating in rollers l9, which rollers l9 en
gage the top'?ange of a further set of ?xed guide
rails 20. The guides form part of the frame
work of the device and are ?xed low down to
the walls of the compartment and are suitably
braced. When the platform l2 has reached the
limitof its horizontal travel, the rollers l9 dis
engage from the guide rails 20, through cut away
parts 2| and vertical movement of the support
and the structure carrying it can now take place.
A' steady upward lift is obtained by the action
of a strong torque spring 22 (Figure 2) which
acting through a peripherally grooved half
pulley attachment 23 compensates for variation
in the torque exerted by the spring 22 through
out the rising and falling movement of the struc
ture, whereby a substantially constant force on 50
the structure throughout the range of movement
is obtained. The spring acting through the cable
24 attached peripherally to the half-pulley 23
gives a partial rotation to a robust rocker arm 25
which by reason of a parallel linkage with a fur
55,
2
2,186,275
ther arm 26 prevents any oscillation of the plat
form about the pivots 21. There are, of course,
two lifting arms 25 and two arms 26 one of
each of which is located on the respective sides
of the tray platform, the arms 25 being con
nected by a transverse strut 25' to which the
cable 24 is connected. The lifting arms 25, 26
are mounted for pivoting on two stout upstanding
ment except when the tray is in its lowermost
position.
Figure 7 is a pictorial view showing to a re
duced scale the platform in its extended position
and a “typewriter” indicated in broken lines,
ready for use.
The device as a whole and as described, lends
itself to being built as a frame or chassis capable
incorporation in furniture as a unit. The
pillars in the form of triangular plates 28 situ ‘ of
arrangement
more especially of the half-pulley
10 ated one each side of the compartment in, and and parallel arms is such that the device is suf
rigidly attached to the framework. The parallel ?ciently compact for the requirements of the
links terminate at their forward ends in pivotal
connections 21 with a robust star-shaped bracket o?ice furniture trade.
What We claim is:
29, ?rmly attached to which are the U-shaped
1. Article transferring and positioning means 15
15 channel members 14.
including a support for the article, a supporting
Referring now to the enlarged details, Figure 2
is an arrangement for adjusting the tension in frame, a vertically movable structure carried by
the lifting spring 22. A worm wheel 32 freely said frame and slidably carrying said support for
borne on the half-pulley spindle 30 has anchored horizontal movement, a pulley rotatably mounted 20
in said supporting frame, a pinion rotatable in
20 to it one end of the spring 22. Rotation of the said supporting frame, a torsion spring of which
worm 3| in any conventional manually oper
able manner adjusts the tension between the
worm Wheel and the half-pulley attachment. It
will be appreciated that by adjustment of the
25 spring articles of varying weights may be carried
on the support, whilst it is further possible to
vary the force required to cause rising and/or
falling of the structure.
Figure 3 shows an arrangement for positively
30 locking the tray l2 in its uppermost position, and
the arrangement is such that looking is automatic.
A locking bar 33 is carried by a pin and slot
arrangement 35 on the housing so as to ‘be slid
able thereon. Locking detents 33A at the ex
tremities of the bar 33 engage in apertures 34 in
the bracket 29. It will be appreciated that during
the ?nal upward movement of the structure the
detents 33Aare displaced against the action of a
return spring 36, and ?nally engage the apertures
40 34. Unlocking is rendered impossible until a
feeler arm 37 is enabled to swing freely across
a plane. Should the feeler meet with any 0b
structions (such as a protruding “typewriter”
platen carriage) unlocking is prevented. Refer
45 ring to Figures 3 and 4 it will be seen that the
unlocking is effected from the front of the sup
port [2 by means of the handle 38 which is pivoted
at one end and free to act within the limit of
a slot 39 at the other. Thrust is transmitted
through an arm 40 to the bell-crank lever 4|
50
and thence by links 42 and 43, to impart rota
tion to a spindle 44, which carries the feeler arm
3'! and the unlocking lever 45, which on rotation
contacts with the block 45A and carries the look
55 ing bar 33 against the springs 36 and releases
the catches 38A. The feeler 31 by reason of its
excessive movement compared to that of the bell
crank lever 4| will effectively prevent premature
' unlocking of the platform I2 if any obstruction is
60 met during its swinging movement. A return
spring 46 is provided in the above arrangement.
Figure 6 shows an enlarged view of the gravity
look, (not shown in Figure 1) whereby hori
zontal inward movement of the platform [2 is
prevented
until complete vertical downward
65
movement is completed. There is provided on the
underside of the U-shaped channel guide I4 a
downward extending lug l4 carrying an arm 49
pivoted at 48 and notched at one end to receive
70 the edge of the back angle member of the ex
tended platform [2. When the weighted end of
the arm 49 is clear from engagement with the
surface of the ?xed guide rail 20, the notched end
will engage the rear edge of the platform angle
75 and so effectively prevent any horizontal move
one end is secured to said pulley and the other
end is secured to said pinion, a worm engaging
said pinion, a shaft carrying said worm and ro
tatable for effecting adjustment of the initial 25.
straining of the spring, locking means to prevent
vertical movement of said support except in one
extreme position of horizontal movement, and
locking means to prevent horizontal movement
of said support except in or near one extreme
3.0:
position of vertical movement.
2. Article transferring and positioning means
including a support, vertically movable means
carrying said support, horizontally movable means
carrying said support, locking means for re
straining the movement of the support, and a‘
feeler element co-operating in release of said look
ing means and depending on freedom of move
ment through a de?ned area for such co-oper
40
ation.
3. Article transferring and positioning means
including a support for the article, the article
being movable relative to the support and requir
ing to be within certain dimensional limits to
permit operation of the device; a structure carry 45
ing said support whereby it is adapted to be
withdrawn from a stowage space and thereafter
raised and lowered, locking means to prevent
movement of said support, a feeler element co
operating in the release of the locking means
and depending on freedom of movement through
a de?nite area for such cooperation, the freedom
of movement of the feeler element being inter
rupted in the projection of part of the article
beyond the dimensional limit, and means for pre 55
venting release of said locking means except after
a completed movement of the feeler element.
4. An article transferring and positioning means
for use with articles of which a part is liable
to project beyond a dimensional limit, compris 60
ing a support for the article, a structure carry
ing said support whereby it is adapted to be
withdrawn from a stowage space and thereafter
raised and lowered; locking means to prevent
downward vertical movement of said support from 65
its uppermost position, a pivoted feeler element
adapted to sweep a plane into which the part
might project, means for releasing said locking
means, and a connection between said releasing
means and said feeler element to cause the latter 70
to pivot on operation of the releasing means, and
to complete its movement before release of the
locking means.
5. An article transferring and positioning means
for use with articles of which a part is liable to
2,136,275
project beyond a dimensional limit, comprising
a support for the article, a supporting frame,
ranged to exert through said element, connection
vertically movable means carried by said frame
and slidably carrying said support for horizontal
counter-balancing the movement exerted by said
movement, balancing means adapted to exert a
substantially constant force on the vertically mov
able means throughout its range of vertical move
ment, aiding its upward movement and restrain
ing its downward movement, locking means to
N) prevent downward vertical movement of said ver
tically movable means from its uppermost posi
tion, a feeler element cooperating with the look
ing means to permit release of the latter and
requiring a predetermined movement for such co
operation, the said predetermined movement of
the f-eeler element being interrupted where the
article projects in part beyond the dimensional
limit, and means for preventing release of said
locking means except after a completed movement
of the feeler element.
'
6. An article transferring and positioning means
including a supporting platform, cooperating
guide elements for compelling horizontal move
ment of the platform, a ?xed guide bar’ arranged
25
below the platform, elements depending from the
platform and cooperating with the guide bar to
prevent relative vertical movement of the plat
form during a predetermined horizontal travel,
means for releasing the elements with respect to
30 the guide bar at a predetermined point in the
horizontal travel of the platform to free the plat
form for vertical movement, members secured to
the sides of the platform, levers connected at
one end to the members, ?xed supports to which
the levers are pivoted intermediate their ends,
and means for exerting a pull on the ends of the
levers remote from the members to counterbalance
the weight of the article upon the platform, said
means being adjustable.
40
3
-
7. An article transferring and positioning means
including a supporting platform, cooperating
guide elements for compelling horizontal move
ment of the platform, a fixed guide bar arranged
below the platform, elements depending from the
45 platform and cooperating with the guide bar to
prevent relative vertical movement of the plat
form during a predetermined horizontal travel,
means for releasing the elements with respect to
the guide bar at a predetermined point in the
horizontal travel of the platform to free the
platform for vertical movement, members secured
to the sides of the platform, levers connected at
one end to the members, ?xed supports to which
the levers are pivoted intermediate their ends,
55 means for exerting a pull on the ends of the levers
remote from the members to counterbalance the
weight of the article upon the platform, and
means carried by the support with which the plat
form cooperates to engage and interlock with said
60 members when the platform has been moved
through a predetermined vertical path.
8. Article transferring and lifting means com
prising a support for the article; a supporting
frame; a support carrying elevator means con
nected to the supporting frame and movable in a
vertical sense; a lever controlling the movement
of said elevator means; guide means permitting
horizontal movement of said support relative to
the elevator means; a rotary element borne by
said frame; a connection between said element
and said lever; and resilient means resisting rota
tion of said element in one direction and ar
and lever a movement equalizing and uniformly
elevator means, support and article carried there
by on said lever throughout the whole range of
vertical movement of said elevator.
9. Article transferring and lifting means com
prising a support for the article; a supporting
frame; a support carrying elevator means con
nected to the supporting frame and movable in a
vertical sense; a lever controlling the movement
of said elevator means; guide means permitting
horizontal movement of said support relative to
the elevator means; a pulley of varying radius
rotatably borne in said frame; a ?exible connec
tion between. said lever and said pulley; resilient
means resisting rotation of said pulley in one
direction, and arranged to exert through said
pulley, connection and lever a movement equaliz
ing and uniformly counter-balancing the move 20
ment exerted by said elevator means, support and
article carried thereby on said lever throughout
the whole range of vertical movement of said
elevator.
10. Article transferring and lifting means as
claimed in claim 8, further comprising means for
adjusting the movement exerted by the resilient
means through said element connection and lever.
11. Article transferring and lifting means com
prising a support for the article; a supporting 30
frame; a support carrying elevator means con
nected to the supporting frame and movable in a
vertical sense; a lever controlling the movement
of said elevator means; guide means permitting
horizontal movement of said support relative to 35
the elevator means, a rotary element borne by
said frame; a connection between said element
and said lever; and resilient means resisting ro
tation of said element in one direction and ar
ranged to exert through said element, connec
40
tion and lever a movement equalizing and uni
formly counter-balancing the movement exerted
by said elevator means, support and article car
ried thereby on said lever throughout the whole
range of vertical movement of said elevator; a 45
locking means for preventing vertical movement
of said elevator means except in one extreme hori
zontal position of said support; and further look
ing means for preventing horizontal movement
of said support except in or near one extreme
position of vertical movement thereof.
12. Article transferring and lifting means com
prising a. support for the article; a supporting
frame; a support carrying elevator means con
nected to the supporting frame and movable in a 55
vertical sense; a lever controlling the movement
of said elevator means; guide means permitting
horizontal movement of said support relative to
the elevator means; a rotary element borne by
said frame; a connection between said element
and said lever; a torsion spring resisting rota
tion of said element in one direction and arranged
to exert through said element, connection and
lever a moment equalizing and uniformly counter
balancing the movement exerted by said elevator 65
means, support and article carried thereby on
said lever throughout the whole range of vertical
movement of said elevator.
ALFRED MONTAGUE COLEMAN.
CHARLES CLAUDE‘ BATER.
GEORGE ARTHUR LEE.
70
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