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Патент USA US3098187

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July'16, 1963
_
E. L, BLElER ETAL
3,098,177
UNIVERSAL CELL FOR PR-INTED CIRCUIT BOARDS
Filed Sept. 15, 1961
2 Sheets-Sheet 1
INVENTORS.
ERNEST L. BL E/ER
BY THADDEUS n4 KUCHARSK/
MYKM
AGENT
July 16, 1963
E. L. BLEIER ETAL
3,098,177
UNIVERSAL CELL FOR PRINTED‘CIRCUIT BOARDS
Filed Sept. 15, 1961
2 Sheets-Sheet 2
_. , /
3,098,177
United States Patent "ice
Patented July 16, 1,963
1
2
3,098,177
boards and connectors comprising a spatial skeletal frame
and a plurality of pairs of spaced-apart printed circuit
UNIVERSAL CELL FOR PRINTED CIRCUIT
board channel guides spanningly supported by the frame.
BOARDS
The frame includes movable upper front and ?xed upper
'
Ernest L. Bleier, Fairport, and Thaddeus W. Kucharski, 5 rear, longitudinally extending, slotted support beams, and
Rochester, N.Y., assignors to General Dynamics Corpo
movable lower front and ?xed lower rear, longitudinally
ration, Rochester, N.Y., a corporation of Delaware
extending, slotted support beams for spannin-gly support
Filed Sept. 15, 1961, Ser. No. 133,516
ing thev plurality of pairs of printed circuit board channel
6 Claims. (Cl. 317-401)
guides in vertical and horizontal alignment at given uni—
The present invention relates to an enclosure and, 10 formly spaced points along the longitudinal axis of the
more particularly, to a universal cell for housing printed
circuit boards and electrical connectors.
Although the present invention is suited for more
?xed upper and lower support rear beams. In accord
' ance with the invention, the printed circuit boards and con
grouped and separately packaged, and plug and socket
ne-ctors are vertically supported by and between the pair
of printed circuit board channel guides. Each of the
channel guides includes apertures at the given uniformly
spaced points for receiving one end of the connectors.
The channel guides further include, at diametrically op
posite ends, T tabs‘to coact with the slots in the front
connectors are used for bringing these packages or
and rear beams.
general applications, it is particularly suited for tele
phone and computer circuit installations utilizing libraries
of printed circuit boards and plug and socket connectors.
The printed circuit boards in these libraries are judiciously
Further included are adjusting means
“modules” into cooperative electrical relation. In such 20 coupled to the movable upper front and lower front
beams for adjusting the separation distance between the
installations, it is desirable to house the printed circuit
boards and connectors in a relatively small amount of
installation space and to mount the printed circuit boards
front and rear beams.
of printed circuit board electrical connectors. The con
nectors are aligned with the printed circuit board and the
nel guides are releasable from the front and rear beams.
In operation, upon outward movement of the front
beams by the adjusting means, the channel guides and
into an enclosure which is compact, light in weight, o?ers
effective cooling, and is relatively inexpensive to manu 25 connectors are simultaneously interlocked in the frame,
the connector being captive between the pair of channel
facture.
guides and the channel guides being captive between the
Prior art printed circuit board enclosures in general
front and rear beams. Upon inward movement of the
comprise a frame having an open front, a plurality of
front beams by the adjusting means, all the connectors
pairs of printed circuit board channel guides welded or
fastened to the frame, and a panel for mounting a plurality 30 are releasable from the channel guides, and all the chan
printed circuit board channel guides. While satisfactory
Other objects and advantages of the present invention
will become apparent from the ensuing description of an
illustrative embodiment thereof in the course of which
for the purpose intended, prior art enclosures have been
reference is had to the accompanying drawings in which:
relatively inflexible to changes in printed circuit board ar
FIGURE 1 is a cutaway view in perspective of a univer
rangements. Further disadvantages reside in the pro
sal cell embodying the features of the invention;
vision of mounting and aligning the printed circuit board
FIGURE 2 is a front view of the universal cell show
channel guides with the panel mounted connectors. As
ing two electrical connectors and an edge of a printed
to cost, generally, spare printed circuit board channel
guides were included in the enclosure to allow for changes 40 circuit board;
. FIGURE 3 is a side view of FIGURE 2 in cross~section
and additions in the printed circuit board arrangements.
taken through line 3—3; and
Thus, the initial cost of the printed circuit board enclosure
FIGURE 4 is a perspective view of a printed circuit
included the cost of spare components which would
board channel guide employed in FIGURES 1-3.
probably not be used.
Accordingly, one object of the present invention is to 45 _ Referring now to the drawings and more particularly
to FIGURE 1, a printed circuit board 2 is shown partly
provide a novel and improved universal cell for mounting
inserted in the universal cell 1 in phantom view by dotted
libraries of printed circuit boards and electrical connectors.
lines. The universal cell 1 can accommodate, as required,
It is another object of the present invention to provide
a plurality of printed circuit boards 2 in spaced parallel
a novel and improved universal cell for printed circuit
relation. The universal cell 1 comprises a spatial skeletal
boards and electrical connectors which is low in cost to
frame having vertical right and left wall members 6' and
manufacture, easy to maintain, and may be modi?ed at a
4, respectively, and a plurality of pairs of printed circuit
relatively low cost.
board channel guides 40. The right wall member 3‘ is
It is still another object of the present invention to pro
omitted from FIGURE 1 in order to show the details of
vide a universal cell characterized by the provision of a
the invention. However, the right wall member 3 is
means for facilitating the alignment and the insertion
shown in FIGURE 2. The right and left wa'll members
and removal of printed circuit boards from their respec
3 and 4 include right and left notched rack mounting
tive electrical connectors.
flanges 5 and 6, respectively, for mounting the cell in a
It is yet another object of the present invention to pro
cabinet or rack. Each of the right and left wall mem—
vide quick removal and/ or addition of supporting struc
bers 3i and 4 further include inwardly turned upper right
ture ‘for printed circuit boards and electrical connectors
and upper left wall brackets 7 and 8, respectively, lying
to effect modi?cation of the printed circuit board and
substantially in a ?rst plane. Each of the right and left
capacity of the cell.
wall members 3 and 4 further include inwardly turned
Another object of the present invention is to provide
lower right and lower left wall brackets 9 and 10, respec
self-alignment between the individual printed circuit
tively, lying in a second plane.
boards and their associated electrical connectors.
The frame further ‘includes similarly shaped, movable
It is still another object of the present invention to 65
provide a skeletal cell having interlocking novel means for '
upper front and ?xed upper rear printed circuit board
releasably interconnecting printed circuit board channel
support beams 11 and 12, respectively, and movable lower
guides and electrical connectors so as to form a mechan
front and ?xed lower rear printed circuit board support
beams 13 and 14, respectively, formed-up from sheet
The present invention accomplishes the above-cited ob 70 metal blanks to achieve strong, light-weight members.
Each of the upper and lower front and rear support beams
jects by providing a universal cell for printed circuit
ically rigid construction.
3,098,177
.43.
11, 12, 13 and 14 include a longitudinally extending chan
nel 15, which not only increases the moment of inertia
of the beams but also serves as a receptacle for a resilient
member 62. The resilient member 62, which may be a
sponge rubber or similar material, will be discussed more
in detail later in conjunction with the channel guides 40
and connector 50.
the lower rear support beam 14 while supported on the
lower right and left brackets 9" and 110‘.
The lower front support beam 13 is movable towards,
and away from, the lower rear support beam incremen
tally in response to movement of two adjusting screws
l34-.
The adjusting screws 34 are supported in a horizontal
position by a lower right bent-up bracket '35 on vertical
Each of the upper and lower front and rear beams 11,
wall member 3 and lower left bent-up bracket 36 on ver
12, 1'3 and 14» include slotted, outwardly extending guide
tical wall member 4. The adjusting screws 34 extend
mounting ?anges 16. The slotted, guide mounting ?anges 10 through clearance holes in bent-up brackets 35 and 36,
16 include a plurality of horizontally extending slots 17
respectively, and are threaded into aligned threaded holes
39 on the right and left sides of the lower front support
axis thereon. The horizontal slots ‘17 communicate with
beam 13.
an outside edge 13 of the guide mounting ?ange 16. Each
Referring now to FIGURES l and 4, there is shown in
of the upper and lower front and rear beams 11, 12, 13 15 FIGURE 4 the printed circuit board channel guide 40
and .14 include a vertically, inwardly extending, slotted
formed-up from a blank of sheet metal. The channel guide
channel bar 19 having vertically extending slots 20 simi
40 includes a base 41, right and left side pieces 42 and
lar in shape to the horizontally extending slots 17 and
43, respectively, a proximal T tab 44, and a distal T tab
aligned along similar points along the longitudinal axis
45. The right and left side pieces 42 and 43 extend for
thereon. The vertical slots 26 are adapted to receive the 20 wardly from ‘the base 41 in a direction diametrically
channel guides 40‘.
opposite to the proximal and distal T tabs 44 and 45,
The upper rear support beam 112 is ?xed perpendicu
‘respectively. The right and left side pieces 42 and 43
larly to the upper right wall bracket 7 and the upper left
are ‘spaced apart a given distance slightly more than
Wall bracket 8 in the ?rst plane by any suitable manner,
the thickness of the printed circuit board 2 to receive
such as weld-ing. Likewise, lower rear support beam 14 is 25 one edge of the printed circuit board 2. The proximal
?xed perpendicularly to the lower right wall bracket 9 and
and :distal T tabs 44 and 45 are similar in shape, each
the lower left wall bracket 10 to form a self-standing,
having a neck portion '46 only slightly narrower than the
rigid frame structure.
horizontal slots 17 in the slotted mount-ing ?ange 16 and
The upper front support beam 11 is movably supported
a head portion 47 which is wider than the horizontal
on upper right wall bracket 7 and upper left wall bracket 30 slots 17. The length of the neck portion 46 is slightly
8 in the ?rst plane. The upper front support beam 11
longer than the thickness of the slotted horizontal mount
includes at its right and left sides elongated holes 21 over
ing ?ange 16. The ‘base ‘41 includes a rectangular open
the upper right and upper left wall brackets 7 and 8, re
ing 48 near the ‘distal T (tab 45. The rectangular open
spectively. The elongated hole 21 has a major axis which
ing 48 includes a rim 49. The rectangular opening
is parallel to the vertical right and left wall members 3
48 and rim 49 will be ‘discussed more in detail in con
and 4. The elongated hole 21 is adapted to receive an
junction with the mounting details of the electrical con
disposed at uniformly spaced points along the longitudinal
upper shoulder screw 22.
The upper shoulder screw 22
nector 50.
is threaded into a threaded hole, not shown, in upper
Referring to FIGURE 1 again, a pair of channel guides
wall brackets 7 and 8. The upper shoulder screw 22 has
'40 are coupled to the cell 1. One of the channel guides
a shank slightly longer than the material thickness of the 40 40 in the pair is spanningly supported on the lower ‘front
upper front support beam 11 to permit the upper front
beam .13 and the lower rear ‘beam 14. The proximal T
tab 44 is held captive in a horizontal slot 17 in the lower
support beam 11 to move towards, or away from, the
front support beam '13 and the distal T tab 45 is held cap
upper rear support beam 12 while supported on top of the
tive in a corresponding horizontal slot 17 in the lower rear
upper right and the upper left wall brackets 7 and 8,
respectively.
45 support beam 14. The other one of the channel guides
40 in the pair is spanningly supported by the upper front
The upper front support beam 11 is moved in the ?rst
beam 11 and the upper rear beam 12. The other one
plane towards, or away from, the upper rear support beam
of the channel [guides 40* is suspended by the proximal T
12 incrementally in response to movement of two adjust
tab 44 and the [distal T tab 45 on mounting ?ange 16 of
ing screws 23. The two adjusting screws 23 are supported
in a horizontal position by an upper bent-up right bracket 50 the upper front and upper rear beams 11 and 12 respec
tively. The upper and lower front and rear beams 11,
25 on vertical right wall member 3 and an upper bent-up
12, 13 and 1-4 are shown in a locked position in FIG
left bracket 26 on vertical wall 4. The adjusting screws
URES l-3. ‘In this locked position, the front and rear
23 extend through clearance holes in upper bent-up right
beams are spaced apart a given distance substantially
and left brackets 25 and 26', respectively, and are threaded
equal to the separation distance between the proximal
into aligned threaded holes 29 on the right and left sides
and distal T tabs 44 and 45, respectively.
of the upper front support beam 11.
Referring now to iFIGURE 2, there is shown a {front
Lower front support beam 13 is movably supported in
view of the cell 1 having a plurality of pairs of channel
a manner substantially similar to the mounting of the
guides 40 in preselected positions. It will be noted that
upper front support beam 11. The lower front support 60 some of the pairs of channel guides 40 are purposely left
beam 13 is movably supported on top of the lower right
out. In accordance with the present invention, the chan
wall bracket ‘9‘ and lower left wall bracket 10 in the sec
nel guides 40 can be added, removed, or rearranged to
ond plane. The lower front support beam 13 includes,
suit a particular need. The minimum spacing between
adjacent channel guides in FIGURE 2 is predicated upon
at its right and left sides, elevated elongated holes 31 over
the lower right and lower left wall brackets 9‘ and 10, 65 the width of the electrical connector 50 and/ or the height
of components located on a side of the printed circuit
respectively. The elongated hole 31 has a major axis
board 2. Other types of electrical connectors may oc
which is parallel to the vertical right and left wall mem
cupy less lateral space and, accordingly, the channel guides
bers '3- and 4. The elongated hole 31 is adapted to receive
a lower shoulder screw 33.
The lower shoulder screw
33 is threaded in a threaded hole, not shown, in lower
wall brackets ‘9' and 110', respectively. The lower shoulder
screw 33 has a shank slightly longer than the cross
sectional height of the support beam 13 to permit the
40 may be spaced closer together.
Referring now to 'FIGURE 3, there is shown a cross~
sectional view of FIGURE 2 taken through line 3-3
showing the universal cell 1 and features of the invention
more in detail. As was stated before, the upper rear
and lower rear beams 12 and 14 are ?xed to the right and
lower support beam v1‘3 to move towards, or away from 75 left vertical wall members 3 and 4.
The channels 15
3,098,177
5
in each of the upper and lower rear beams 12 and 14
are diametrically opposed to one another. Traversing
6
a' desired slot 17v on the upper rear beam 12 by the
distal tab 45. The channel ‘guide 40 is then pivoted on
the dist-a1 tab 45 1and guided into the vertical slot 20 of
each of the channels 15 are a pair of channel guides 40,
the upper rear beam 12 and urged towards the upper
shown in sectional view. The rectangular openings 48
in each of the channel guides 40 traverses the channels UK front beam 11 and placed in a corresponding vertical
slot 20 and horizontal slot 17 on the upper front beam
15 in the upper and lower rear beams 12 and 14 to per
11. The channel guide 41) is then moved towards the
mit mounting of the connector 50 in a manner to be de
upper rear beam 12 to a position where the rectangular
scribed below.
opening 48 fully traverses the channel 15 in the upper
The electrical connector 50 includes an upper and
beam 12. Likewise, the other corresponding chan
lower mounting tang 51 and 52, respectively. The upper 10 rear
nel guide 411 is hooked into a diametrically opposite slot
and lower mounting tangs 51 and 52 project into channels
17 in the lower rear beam 14 by the distal T tab 45.
15 of the upper and lower rear beams 12 and 14. The
The channel guide 40 is then pivoted on the distal T tab
upper and lower tangs 51 and 52 include upper and lower
45 and guided into the vertical slot 20' of the lower rear
notches 53 and 54, respectively, communicating with the
beam
14 and urged towards the lower front beam 13' and
15
trailing edge 55 of the connector 50. The upper notch
placed in a corresponding vertical slot 20 and horizontal
53 includes a vertical surface 56 (and a horizontal surface
slot 1'7 on the lower front beam 13. The channel guide
57. The lower notch 54 includes a vertical surface 58
and a horizontal surface 59. The distance between the
40 is then moved towards the lower rear beam 14 to a
position where the rectangular opening 48 fully traverses
upper and lower notches 53‘ and 54 is substantially equal
the channel 15. The cell is now ready to accept an elec
to the separation distance between the pair of channel 20 trical connector ‘50'. If desired in this position, channel
guides 40 which are interposed between the upper and
guides may be added or removed and locked in place
lower rear beams 12 and 14. And, more speci?cally,
upon movement of the front support beams 11 and 13.
the separation distance between the horizontal surface
In order to add the electrical connector 50, the lower
57 and horizontal surface 59 is substantially equal to
tang 52 is inserted into the channel guide openings 48,
25
the separation distance of the bases 41 of the pair of
which traverses the lower rear beam 14. The electrical
channel guides 40. The thickness of the upper and lower
connector 50 is then pivoted on the resilient member 62
tangs 51 and 52 is only slightly less than the width of
‘disposed in the channel 15. As was mentioned before,
the rectangular opening 48 so that excellent alignment
the resilient member 62 may be omitted, in which case,
is achieved between the channel guides 40 and the con
30 the connector is pivoted about notch 54. The resilient
nector 50 and printed circuit board 2.
member 62, if present, is compressed to allow the elec
_ The upper and lower tangs 51 and ‘52 {further include
upper and lower leading edge surfaces 60 and 6'1, each
spaced a given horizontal distance ‘from the vertical sur
faces 56 and 58, respectively. The given horizontal dis
tance bears a relationship with the channels 15 in the
upper and lower support beams 12 and 14 and the chan
nel guides 40. FIGURE 3 shows the channel guides 40
secured between the upper and lower front and rear
beams 11, 12, 13‘ and 114, and the connector 50 being
held captive between the pair of channel guides 40.
The upper and lower tanks 51 and 52 are prevented from
moving vertically by the horizontal surfaces 57 and 59
on upper and lower tangs 51 and ‘52. The channel guides
40 also urge the connector against the edge of the chan
nel 15 preventing the connector 501 from moving towards
the front or rear of the cell 1. The rim 49 in the chan
trical connector 50 to pass under the upper rear beam 12.
The upper tang 51 is then inserted up into a corresponding
opening 48, which traverses the upper rear beam 12.
The resilient member 62, disposed in each of the chan
nels 15 in the upper and lower beams 12 and 14, yield
ingly holds the electrical connector 51} in a neutral posi
tion such that the ?rst upper and lower notches 53 and
54, respectively, are in alignment with the pair of chan
nel guides 40». If the resilient member 62 is omitted,
the connector 50 is “hooked” onto the pair of channel
guides 46' by the horizontal surfaces 57 and ‘59 of upper
and lower tangs 51 and 52, respectively.
,- After the connector is hooked on the pair of channel
guides 40, the adjusting screws 23 and 34, respectively,
are turned in the proper direction, the front beams 11
and 13 are moved away from the rear beams 12 and 14,
nel guide prevents the connector 50 from moving lat
respectively. The upper and lower front beams 11 and
erally. Thus, the connector 50 is not only held in align
13 urge the channel guides 40‘ towards the front beams
ment with channel guides 40 but actually held in place
and, at the same time, the channel guides 40‘ urge the
by the channel guides. It should also be noted that the 50 connector 50 to move under the rear support beams 12
electrical connector ‘50' “floats” between the upper rear
and 14 until the upper and lower leading surfaces 64)
beam 12 and the lower rear beam 14 in channels .15.
and 61, respectively, abut the side of the channel 15 of
Referring to FIGURES l and 3, a resilient member 62
the upper and lower rear beams 12 and 14, respectively.
?lls the channel 15 of each of the support beams 11, 12,
Rim 41$ in each of the channel guides 41) coacts with
13 and 14 and extends slightly above the channel. The
notches 53 and 54. Thus, in accordance with the inven
resilient member 62 is interposed between the channel
tion, the channel guides 4t} and connectors 50‘ are simply
guides 40 and the support beams 11, 12, 13 and 14. The
locked into place, upon horizontal movement of the
resilient member 62 yieldingly urges the channel guides
upper and lower front beams 11 and 13.
40 inwards putting a drag on printed board 2 which may
It will be obvious to those skilled in the art that the
be inserted between the pair of channel ‘guides. The 60 invention may ?nd wide application with appropriate
resilient member 62 also dampens vibrations in the sup
modifications to meet individual design circumstances but
port beams 11, 12, 13 and 14 and the channel guides 40‘.
without substantial departure from the essence of the
The resilient member 62, while desirable, may be omitted
invention. For example, the proximal and distal T tabs
without hindering the operation of the invention.
44 and 45' may have a modi?ed shape still having a head
65
The operation‘ of the cell will ?rst be explained in con
portion and a neck portion. It is not, therefore, desired
junction with the insertion of channel guides 40 and
that the invention be limited to the speci?c arrangement
electrical connector 50‘. Before adding the channel guides
shown and described herein, and it is intended in the ap
Y40 and the connector 50, the upper and lower front beams
pended claims to cover all such modi?cations as fall
11 and 13 are moved inwardly in‘ response to the turning
within the true spirit and scope of the invention.
of the adjusting screws 23 and 34, respectively, in the
What is claimed is:
appropriate direction. The upper and lower front beams
1. In ‘a universal cell for slidably mounting a plurality
11 and 13‘ may be moved inwardly until stopped by the
of
printed circuit boards in spaced, parallel relation, the
shoulder screws 22 and 33, respectively, coacting with
combination comprising, a load-bearing frame including
one end of the elongated holes 21 and 31, respectively.
One of the channel guides 40 may now be hooked into 75 upper and lower ‘front, longitudinally extending, opposed
3,098,177
guide support beams and upper and lower rear, longi
tudinal-ly extending opposed guide support beams, said
upper front and upper rear beams spaced a given ?rst
distance apart, said lower front and lower rear beams
spaced a distance substantially equal to said given ?rst
distance apart, each of said upper and lower front beams
presenting outwardly directed front mounting ?anges
lying substantially in given upper and lower parallel
8,
front and upper rear beams, the other one of said guides‘
in said pair of guides being spanningly supported by said
lower front and lower rear beams at points along the
longitudinal axis of said lower front and lower rear
beams in opposition to said corresponding ones of said
given points along the longitudinal axis thereon, whereby
said pair of guides are vertically and horizontally aligned
to receive said one of said printed circuit boards edgewise,
planes, respectively, each of said upper and lower rear
each of said guides having ?rst and second headed tabs
beams presenting outwardly directed rear mounting 10 on a side opposite to said ‘grooves in said guides, said ?rst
?anges lying substantially in said upper and lower planes,
‘and second headed tabs being spaced a given distance
respectively, each of said outwardly directed front and
apart substantially equal to said given ?rst distance, said
rear mounting ?anges on said upper and lower front and
headed tabs including a neck portion slidable in said
rear beams including similarly aligned slots communicat
given slots in said mounting ?anges, and means coupled
ing with the outwardly directed edge thereof spaced at 15 to
said frame for varying the separation distance between
given points along the longitudinal axis of said upper
said beams from said given ?rst distance to a given second
front and lower front and upper rear and lower rear
separation distance, said given second separation distance
beams, respectively, a plurality of pairs of readily detach
being
less than said given ?rst separation distance, where
able, similarly shaped, grooved printed circuit board
by said pair of guides are secured to said mounting ?anges
guides, one of said guides in said pair being spanningly
when said mounting ?anges are separated said given ?rst
supported by said upper front and upper rear beams at
separation distance and detachable when said mounting
corresponding ones of said given points along the longi
?anges achieve said given second separation distance.
tudinal axis of said upper front and upper rear beams,
3. In a universal cell for slidably mounting a plurality
the other one of said guides in said pair of guides being
plate-like circuit cards in spaced, parallel relation, the
spanningly supported by said lower front and lower 25 of
combination comprising, a load-bearing frame including
rear beams at points along the longitudinal axis of said
upper and lower front, longitudinally extending, movable,
lower front and lower rear beams in opposition to said
opposed card guide support beams and upper and lower
corresponding ones of said given points along the longi
rear,
longitudinally extending, ?xed, opposed card guide
tudinal axis thereon, whereby said pair of guides are
support
said upper front and upper rear beams
vertically and horizontally aligned to receive said one of 30 spacedabeams,
given ?rst separation distance apart, said lower
said boards edgewise, each of said guides having ?rst
front and lower rear beams spaced a distance substan
and second distorted T tabs on a side opposite to said
tially equal to said given ?rst separation distance, each
grooves in said guides, said ?rst and second distorted T
of said upper and lower front beams presenting outwardly
tabs being substantially normal to the longitudinal axis
directed front mounting ?anges lying substantially in
of said guides, said ?rst and second distorted T tabs 35
given upper and lower parallel planes, respectively, each
being spaced a given distance apart substantially equal
of said upper and lower rear beams presenting outwardly
to said given ?rst distance, said distorted T tabs includ
directed rear mounting ?anges lying substantially in said
ing a stem- portion slidable in said given slots in said
upper and lower planes, respectively each of said out
mounting ?anges, and means coupled to said frame for
wardly directed front and rear mounting ?anges on said
varying the separation distance between said beams from
upper
and lower front and rear beams including similarly
said given ?rst separation distance to a given second
aligned slots communicating with the outwardly directed
separation distance, said given second separation distance
edge thereof spaced at given points along the longitudinal
being less than said given ?rst separation distance, where
axis of said upper and lower front and upper and lower
by said pair of guides are secured ‘to said mounting
rear beams, respectively, a plurality of pairs of readily
?anges when said mounting ?anges are separated said 45 detachable,
similarly shaped, grooved guides, one of said
given ‘?rst separation distance and detachable when said
guides
in
said
pair ‘of gniides being spanningly supported
mounting ?anges achieve said second separation distance.
by said upper front and upper rear beams at correspond
2. In a universal cell for slidably mounting a plurality
ing ones of said given points along the longitudinal axis
of printed circuit boards in spaced, parallel relation, the
of said upper front and upper rear beams, the other one
50
combination comprising, a load-bearing frame including
of said guides in said pair of guides being spanningly sup
movable upper and movable lower front, longitudinally
ported by said lower front and lower rear beams at points
extending, opposed guide support beams and ?xed upper
along the longitudinal axis of said lower front and lower
and ?xed lower rear, longitudinally extending, opposed
rear beams in opposition to said corresponding ones of
guide support beams, said movable upper front and ?xed
said given points along the longitudinal axis thereon,
upper rear beams spaced a given ?rst distance apart, said 55
whereby said pair of guides are vertically and horizon
movable lower front and ?xed lower rear beams spaced
tally aligned to receive one of said plate-like cards edge
a distance substantially equal to said given ?rst distance
wise,
each of said guides having ?rst and second dis
apart, each of said upper and lower front beams present
ing outwardly directed front mounting ?anges lying sub
torted T tabs on a side opposite to said grooves in said
stantially in given upper and lower parallel planes, re 60 guides, said ?rst and second distorted T tabs being sub
stantially normal to the longitudinal axis of said guides,
spectively, each of said upper and lower rear beams pre
said ?rst and second distorted T tabs being spaced a
senting outwardly directed rear mounting ?anges lying
given distance apart substantially equal to said given ?rst
substantially in said upper and lower planes, respectively,
each of said outwardly directed front and rear mounting
separation distance, said distorted T tabs including a stem
?anges on said upper and lower front and rear beams 65 portion slidable in said given slots in said mounting
including similarly aligned slots communicating with the
?anges, and means coupled to said frame and said upper
outwardly directed edge thereof spaced at given points
and lower front beams for varying the separation dis
along the longitudinal axis of said upper front and lower
tanee between said upper front and rear beams and be
front and upper rear and lower rear beams, respectively,
tween said ‘lower rear and front beams from said given
a plurality of pairs of readily detachable, similarly shaped, 70 ?rst separation distance to a given second separation dis
grooved printed circuit board guides, one of said guides
tance, said second separation distance being less than
in said pair being spanningly supported by said upper
front and upper rear beams at corresponding ones of
said given ?rst separation distance, whereby said pair
of guides are secured to said mounting ?anges when said
said given points along the longitudinal axis of said upper 75 mounting ?anges are separated said given ?rst separation
3,098,177
9
distance and detachable when said mounting ?anges
achieve said given second separation distance.
4. A universal cell for releasably mounting printed
circuit board connectors and printed circuit boards of
uniform width and thickness in spaced, parallel relation
comprising, a box-like, rectangular, skeletal frame having
a movable upper front beam and a ?xed upper rear beam
lying in an upper plane and a movable lower front beam
and a ?xed lower rear beam lying in a lower plane sub
10
ialigned slots communicating with the outside edge there
of for receiving said proximal and distal headed tabs, re
spectively, to cause one of said guides in said pair of
guides to. be spanningly supported by said upper ‘front
and upper rear beams, respectively, said lower, outwardly
directed, mounting ?anges of said lower front ‘and lower
rear beams having aligned slots communicating with the
outside edge thereof for receiving said proximal and distal
tabs to cause said other one of said guides in said pair
stantially parallel to said upper plane, ?rst means for 10 of guides to be spanningly supported by said lower front
and lower rear beams, respectively, each of said .guides
moving said upper front beam in said upper plane sub
in said pair of guides including an ‘elongated hole trans
stantially parallel to said upper rear beam from a ?rst
verse to said longitudinal channels in said upper rear and
given separation distance from said upper rear beam to
lower rear beams for receiving an end of one of said
a second separation distance from said upper rear beam,
said ?rst separation distance being more than said sec 15 electrical connectors, each of said connectors including
ond separation distance, second means for moving said
lower front beam in said lower plane substantially paral
lel to said lower rear beam from one separation distance
from said lower rear beam to another separation dis
notched means coacting with said elongated holes in each
of said guides in said pair of guides for securing said
connector between said pair of guides, and releasing
means coupled to said frame for moving said upper front
tance, said one separation distance being substantially 20 and lower front beams to cause said connector and said
pair of guides to be releasable from said frame.
equal to said ?rst separation distance and said other one
6. In a universal cell for releasably mounting printed
separation distance being substantially equal to said sec
circuit boards and coacting printed circuit board electrical
ond distance, a plurality of pairs of spaced-apart longi
connectors in spaced, parallel relation, orthogonally be
tudinal printed circuit board guides of uniform length
for orthogonally receiving said printed circuit boards be 25 tween ?rst and second parallel planes, the combination
comprising, a skeletal frame of generally parallelepiped
tween said upper and lower planes, said printed circuit
board guides having a longitudinal groove on one side
for receiving one edge of said printed circuit board and
spaced-apart proximal and distal headed tabs on the dia
con?guration having like constructed, longitudinally ex
tending, movable, upper front, and ?xed, upper rear beams
having upper, outwardly directed, mounting ?anges lying
metrically opposite side thereof, upper coupling means 30 in said ?rst plane and movable, lower front and ?xed,
lower rear beams having lower, outwardly directed mount
ing ?anges lying in said second plane, said upper rear
coacting with said proximal and distal headed tabs for
beam and lower rear beam being opposed with respect to
securing one of said guides in said pair of guides to said
?xed to said upper front beam and said upper rear beam
upper front beam and said upper rear beam in response
each other, each of said upper rear and lower rear beams
having a longitudinal channel along the opposing surfaces
thereof, a plurality of longitudinal pairs of similarly con
structed grooved guides having opposed receiving chan
nels for slidably mounting said printed circuit boards and
releasably
mounting said printed circuit board electrical
rear beam, lower coupling means ?xed to said lower front
beam and said lower rear beam coacting with said proxi 40 connectors therebetween, each- of said guides in said pair
of guides including proximal and distal headed tabs
mal and distal tabs for securing one of said pairs of
spaced a given distance apart on opposite ends thereof,
guides to said lower front beam and said lower rear beam
said upper, outwardly directed, mounting ?anges of said
in response to positioning of said lower front beam in
to positioning of said upper front beam in said ?rst sepa
ration distance, said one of said pair of guides being re
leasable in response to said upper front beam being posi
tioned in said second separation distance from said upper
upper front and upper rear beams having aligned slots
said one separation distance from said lower beam, said
communicating
with the outside edge thereof for receiv
45
other one guide of said pair of guides being releasable in
ing
said
proximal
and distal headed tabs, respectively, to
response to said lower front beam being positioned in said
cause one of said guides in said pair of guides to be span
other one separation distance from said lower rear beam,
ningly supported by said upper front and upper rear
and said upper and lower coupling means further pro
beams, respectively, said lower, outwardly directed mount
viding for vertical and horizontal alignment of said pair
50 ing ?anges of said lower front and lower rear beams hav
of printed circuit board guides.
ing ‘aligned slots communicating with the outside edge
5. ‘In a universal cell for releasably mounting printed
thereof for receiving said proximal and distal tabs to
circuit boards and coacting printed circuit board electrical
cause said other one of said guides in said pair of guides
connectors in spaced, parallel relation, orthogonally be
to be span-ningly supported by said lower front and lower
tween ?rst and second parallel planes, the combination
beams, respectively, each of said guides in said pair
comprising, a skeletal frame of generally parallelepiped 55 rear
of guides including an elongated hole transverse to said
con?guration having like constructed, longitudinally ex
longitudinal channels in said upper rear and lower rear
beams for receiving an end of one of said electrical con
nectors, each of said ends of said connectors being dis
in said ?rst plane and movable, lower front and ?xed,
posed in said channels of said upper rear and lower rear
lower rear beams having lower, outwardly directed mount 60 beams, said connector including notched means coacting
tending, movable, upper front, and ?xed, upper rear beams
having upper, outwardly directed, mounting ?anges lying
ing ?anges lying in said second plane, said upper rear
beam and lower rear beam being opposed with respect to
with said elongated hole in each of said guides in said
pair of guides for securing said connector between said
each other, each of said upper rear and lower rear beams
pair of guides, and releasing means coupled to said frame
having a longitudinal channel along the opposing surfaces
moving said upper front and lower front beams to
thereof, a plurality of longitudinal pairs of similarly 65 for
cause said connector and said pair of guides to be releas
constructed guides each having a printed circuit board
able from said frame.
receiving channel for slidably mounting said printed cir
cuit boards and releasably mounting said printed circuit
board electrical connectors therebetween, each of said
guides in said pair of guides including proximal and dis 70
tal headed tabs spaced a given distance apart on opposite
ends thereof, said upper, outwardly directed, mounting
?anges of said upper front and upper rear beams having
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,701,346
Powell _______________ __ Feb. 1, 1955
2,967,284
2,976,510
Bailey et al. ___________ __ Jan. 3, 196-1
Blain _______________ .._. Mar. 21, 1961
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