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Патент USA US3069761

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Dec. 25, 1962
s. T. DEAKIN
‘
3,069,751
MANUFACTURE OF MULTIPLE CONTACT DEVICES
Filed Oct. '7, 1958
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Inventor:
STANLEY THOMAS DEAKIN
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By:
Attorneys
United States Patent O?lice
1
3,069,751
MANUFACTURE OF MULTIPLE CONTACT
DEVICES
Stanley Thomas Deakin, Ewell West, England, assignor to
Associated Electrical Industries (Woolwich) Limited, a
British company
Filed Oct. 7, 1958, Ser. No. 765,764
Claims priority, application Great Britain Oct. 10, 1957
4 Claims. (Cl. 29—155.5)
3,069,751
Patented Dec. 25, 1962
2
The tallow is mixed with the pitch and the wood ash is
added subsequently. This mixture is placed in a layer
on a strip of material 1. If the mixture is subsequently
added it becomes tacky and adhesive.
The strip 1 is pressed under a guide roller 4 and over
a roller 5 which may be heated so as to apply heat to
the adhesive material if required. Heat may be sup
plied to the roller 5 by means of hot air or other ?uid
?owing through a duct 6 from a suitable source of heat.
The strip 1 then passes over a block 7 which has an upper
This invention relates to the manufacture of multiple
contact devices of the kind in which an array of contacts
is embedded in recesses or apertures in an insulating
surface 8. A plurality of ducts 9 are located above the
surface 8 and are supported in a holder ‘11. The ducts
9 are arranged in accordance with the required pattern
of contact members. The contact members are fed one
base member in accordance with a predetermined pattern.
The invention has an important application in socket 15 by one in succession down each of the ducts 9 and on
to the upper surface of the adhesive layer 3 on the strip
contacts for plug-in type components, such as thermionic
1 and adhere thereto. The strip 1 is subsequently
valves and transistors, used in printed circuits.
pressed over the roller 12. As the strip 1 passes under
Printed circuits are usually formed on an insulating
the ducts 9 contact members drop down so as to adhere
panel and’ the socket contacts pressed into apertures cut
in the panel and held there ‘by the resilience of the con 20 to the layer 3 in the required pattern and groups of con
tact members 14 are formed at successive positions on the
tact. Valve sockets for instance will be usually arranged
strip 1 as the strip 1 moves across the ends of the ducts
around a pitch circle whilst sockets for other components
under the action of the rollers.
will be arranged in appropriate patterns.
After the contact members have been a?ixed to the
Normally in apparatus such, for instance, as a radio
receiver employing printed circuitry, there will be a 25 layer 3 it may be necessary to store the strip 1 before
the contact members are inserted within the apertures
number of components and hence the ?tting of the
of a printed circuit. It will therefore be convenient to
socket contacts into the aperture on the insulating board
roll up the strip to store it. ‘If the strip is rolled means
can be a lengthy and laborious operation adding appre
must be provided to prevent the adhesive layer 3 from
ciably to the cost of production.
The object of the present invention is to provide an 30 adhering to other protions of the strip and also to pre
vent damage to the contact members. For this surface,
improved method of inserting contact members within
after the contact members have been placed in position,
an insulating body.
the adhesive layer may be coated with a layer of French
According to the present invention a method of insert
chalk or other absorbent powdered material or a layer
ing contact members within apertures arranged in a pat
tern in a vbody of insulating material comprises the steps 35 of paper may be placed over the portion of the adhesive
layer not covered by the contact members. Alternatively
of pressing said contact members in accordance with
a sheet of foam rubber or other compressible material
said pattern on a strip of material having an adhesive
may be placed on the adhesive layer so as to extend either
surface, placing said strip of material over said body so
in strips transverse to the strip 1 and between each suc
that said contact members are aligned with said apertures,
cessive groups of contact mmbers, or in strips encircling
placing each of said contact members into the corres
ponding aperture so that said contact members are re
each group, or in one or more strips extending longitudi
tained within said apertures and removing said strip of
nally along the strip .1 outside each group of contact
material so as to leave said contact members within said
members. This is illustrated in FIG. 2 which shows two
apertures.
longitudinally extending strips of foam rubber 15, 16
The contact members may be arranged in repetitive 45 extending one on each side of the groups of contact
groups on the adhesive surface.
The contact members may be fed through a plurality
of ducts on to the adhesive surface, the outlet ends of
which ducts are arranged in the required pattern so that
the contact members, as fed on to the adhesive surface, 50
conform to the required pattern. The strip of material
may be fed continuously or in steps across the ends of the
ducts.
In order that the invention may be more readily under
members 14.
As an alternative, or in addition to, the
strips 15, .16, transversely extending strips 17 may be
placed between the groups of contact members.
The
strips of compressible material 15, 16 may conveniently
be applied to the strip 1 as shown in FIG. 1 by unwind
ing the strips of compressible material from a drum 18‘.
Only one strip 15 is illustrated in the ?gure.
When the strips of rubber or other compressible ma
terial, or other protective devices as described above are
stood reference will now be made to the accompanying 55 in position on the strip 1, the strip, with the contact
drawing in which:
members 14, may be rolled up and stored until required
FIG. 1 is an illustration of apparatus used for affixing
for use, the thickness of the compressible material pre
venting damage to the contact members and also pre
contact members to a strip of material having an ad
venting the adhesive layer from sticking to portions of
hesive layer on one surface;
FIG. 2 is a perspective view of the strip with the con 60 the strip.
FIG. 3 illustrates how the contact members are in_
tact members adhering to one surface in accordance with
a required pattern, and
serted in apertures in a printed circuit board, or other
board of insulating material having apertures of ‘a cer
FIG. 3 is a side view, sectioned, of an apertured plate
tain pattern. The board 21 is shown in section through
illustrating how the contact members are pressed into
the apertures.
65 the apertures 22. The contact members 14, which are
With reference to FIG. 1 a strip of ?exible material 1,
shown as sockets but may, of course, be any suitable
type of pin, socket or connector, adhere to the surface
which may be plastic, cloth, paper or any other suitable
of the layer 3 and are placed over the corresponding
material, is wound off a drum 2. The strip of material
apertures 22 of each group and are then pressed into the
1 has a layer of adhesive material 3 on its upper surface.
apertures by the action of an operator’s thumb 23 or by
This adhesive material may be of any suitable type. One
type which has been found satisfactory in use is a mix
other suitable means. The contact members are so shaped
ture of pitch, wood ash and tallow in the ratio 511:1.
with lips 24 and ?anges 25 that they are retained with
3,069,751
3
4
in the apertures 22 by the action of the lips and the
contact devices comprising the steps of placing in accord
?anges engaging respectively with opposite surfaces of
ance with a required pattern on an adhesive surface of
a strip of material a plurality of contact members of
the plate 21. The strip‘ of foam rubber 15 is com
pressed as the contact members are pressed in the aper
tures and prevents the adhesive layer 3 from. adhering to
the upper surface of the plate 21. The use of French
chalk or paper as described above will also prevent the
adhesive layer 3 from adhering to the plate 21.
the type adapted to be self-retaining in suitably shaped
apertures, placing non-adhesive compressible material
having a thickness greater than the height of said con
tact members onto said adhesive surface between at least
some of said contact members, placing said strip of ma
terial over an insulating body formed with apertures ar
When the contact members are retained in position
within the aperture 22 the strip 1 is removed from the 10 ranged in accordance with the required pattern so that
said compressible material is compressed and said con
upper surfaces of the ?anges 24 leaving the contact
tact members are inserted into respective apertures and
members in position Within the apertures. The strip 1 is
retain themselves therein and ?nally removing said strip‘
?rst laid over the surface of the plate 21 so that the
of material together with said compressible material
contact members may be pressed into each group of
apertures. The method of inserting the contact mem
from said contact members so as to leave said contact
members within said apertures.
bers is quick and accurate and greatly decreases the time
3. The process of manufacturing mulitple electrical
taken to construct a printed circuit. The plate 21 may
contact devices comprising the steps of placing in ac
be the body of a valve holder or other insulated body
cordance with a required pattern on an adhesive surface
into apertures in which contact members are to be in
serted. The strip 1 may, of course, be cut into pieces 20 of a strip of material a plurality of contact members of
the type adapted to be self-retaining in suitably shaped
after the contacts have been pressed on the adhesive
layer.
apertures, placing non-adhesive compressible material
having a thickness greater than the height of said con
A pressure sensitive adhesive sheet material, for ex
tact members on said adhesive surface so that said com
ample that sold under the name “Sellotape,” a registered
trademark, may be used for the strip 1 and this is of 25 pressible material extends longitudinally along said strip
adjacent to said contact members, placing said strip of
such a type that it is easily removed from the contact
material over an insulating body formed with apertures
members when the contact members have been placed
arranged in accordance with the required pattern so that
in position Within the apertures. The adhesive layer 3
said compressible material is compressed and said con
may not be applied to the whole of the surface of the
strip 1 but may only extend ‘over the portions of the sur 30 tact members are inserted into respective apertures and
retain themselves therein and finally removing said strip
face to which the contact members are required to ad
here. The material ‘of the adhesive layer is applied by
of material together with said compressible material
from said contact members so as to leave said contact
any suitable method well known in the art.
members within said apertures.
The strip 1 may be moved continuously or in strips
4. The process of manufacturing multiple electrical
across the ends of the ducts 9. The contact members 35
contact devices comprising the steps of placing in ac
may be fed on to the strip 1 from below if required and
cordance with a required pattern on an adhesive surface
in this case the adhesive layer will have to be coated on
of a strip of material a plurality of contacts members of
to the lower ‘surface of the strip 1.
the type adapted to be self~retaining in suitable shaped
The invention may be employed for inserting contacts
of the type described in co-pending patent application 40 apertures, placing non-adhesive compressible material
having a thickness greater than the height of said con
tact members onto said adhesive surface adjacent to said
contact members, rolling up said ‘strip so that the free
surface of said compressible material abuts against a
‘contact devices comprising the steps of placing in accord 45 non-adhesive surface on said strip and protects said con
Serial No. 749,673 in an insulating panel for a printed
circuit.
What I claim is:
1. The process of manufacturing multiple electrical
ance with a required pattern on an adhesive ‘surface of
tact members, unrolling said strip, placing said strip of
material ‘over an insulating body formed with apertures
arranged in accordance with the required pattern so that
the type adapted to be self-retaining in suitably shaped
said compressible material is compressed and said con
apertures, placing non-adhesive compressible material
having a thickness greater than the height of said con 50 tact members are inserted into respective apertures and
retain themselves therein and ?nally removing said strip
tact members onto said adhesive surface adjacent to said
of material together with said compressible material
contact members, placing said strip of material over an
a strip of material a plurality of contact members of
insulating body formed with apertures arranged in accord
ance with the required pattern so that said compressible
material is compressed and said contact members are in
serted into respective apertures and retain themselves
therein and ?nally removing said strip of material to
gether with said compressible material from said contact
members ‘so as to leave said contact members within said
50
apertures.
2. The process of manufacturing multiple electrical
from said contact members so as to leave said contact
members Within said apertures.
References 6Cited in the ?le of this patent
UNITED STATES PATENTS
2,251,326
2,281,478
2,676,765
Cullin _________ _.________ Aug. 5, 1941
Chirelstein __________ __ Apr. 28, 1942
Kaplan _____________ __ Apr. 27, 1954
2,768,429
Willis _______________ __ Oct. 30, 1956
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