GB2103020A - Clamp arrangements for cooling electrical circuits - Google Patents
Clamp arrangements for cooling electrical circuits Download PDFInfo
- Publication number
- GB2103020A GB2103020A GB08220405A GB8220405A GB2103020A GB 2103020 A GB2103020 A GB 2103020A GB 08220405 A GB08220405 A GB 08220405A GB 8220405 A GB8220405 A GB 8220405A GB 2103020 A GB2103020 A GB 2103020A
- Authority
- GB
- United Kingdom
- Prior art keywords
- clamp
- arrangement according
- walls
- elongate member
- clamp arrangement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001816 cooling Methods 0.000 title 1
- 230000000295 complement effect Effects 0.000 claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims description 29
- 230000001419 dependent effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 238000000605 extraction Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20536—Modifications to facilitate cooling, ventilating, or heating for racks or cabinets of standardised dimensions, e.g. electronic racks for aircraft or telecommunication equipment
- H05K7/20545—Natural convection of gaseous coolant; Heat transfer by conduction from electronic boards
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1401—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means
- H05K7/1402—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting printed circuit boards
- H05K7/1404—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting printed circuit boards by edge clamping, e.g. wedges
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
A clamp arrangement for clamping a circuit board 1 between two opposing parallel walls 7a comprises two identical parts 13, 15 each having a first flat surface 17, 19 and a second oppositely directed surface 21, 23 consisting of a series of correspondingly angled ramps extending along the length of the surface. Each of the first surfaces faces one of the two opposing walls, the ramp surfaces fitting together in a complementary manner, and the circuit board being placed between the first surface of the first part and the adjacent wall. The other part is held in a fixed position relative to its adjacent wall. The ramp surfaces of the first part are caused to slide with respect to the complementary ramp surfaces of the other part providing a transverse component of movement, which, being limited by the width of the enclosure defined by the two walls, serves to clamp the circuit board between the first surface of the first of the parts and the adjacent wall. <IMAGE>
Description
SPECIFICATION
Clamp arrangements
This invention relates to clamp arrangements and has especial relevance to clamp arrangements for securing members in good thermal contact, particularly in environments where the mechanism is prone to large vibrational effects, e.g. in an aircraft.
Clamp arrangements for securing printed circuit boards in good thermal contact with cold walls are legion. It is the common practice to provide cold walls which have pairs of opposed slots into which the two lateral margins of a printed circuit board are inserted. The boards usually carry a heat conductive ladder the cross members of which are in close proximity to the electronic components mounted on the board, and the side members of which lie on the lateral margins of the board. A clamp mechanism is provided which serves to bias the board so that at least one of the side members of the heat conductive ladder makes good thermal contact with the cold wall.
Clamp mechanisms are well known which employ mutually slidable abutting ramp surfaces to produce a clamping effect. These devices usually, however, only produce contact between the lateral margin of the board and the cold wall at discrete points along the length of the board margin, thus creating the danger of hot spots on the board, and also are not adequate as the sole means of board retention in situations prone to vibration. Generally these devices suffer the further disadvantages that they are relatively complex to manufacture and need special mounting means to maintain them in place, the mounting means necessarily causing an extra weight burden. Furthermore such devices will often not tolerate a range of board thicknesses.
It is an object of the invention to provide a simple, light, clamp arrangement wherein these difficulties are overcome.
According to the present invention a clamp arrangement for clamping an elongate member extending between two opposing, substantially parallel walls incorporates a mechanism including: first and second removeable parts each having a first substantially flat surface, and a second oppositely directed surface consisting of a series of correspondingly angled ramps extending along the length of the surface, the two parts being disposed between said two walls so as to extend in a longitudinal direction within an enclosure defined by said two walls, and being oppositely directed with respect to each other, and positioned such that said first surface of the first part faces one of said walls, and said first surface of the second part faces the other of said walls, with the elongate member between one of said first surfaces and the adjacent wall and the respective ramp surfaces associated with each of said first and second parts fitting together in a complementary manner; fixing means mounted through a first appendage, to hold said first part in a substantially fixed position relative to said one of said walls; and actuation means mounted through a second appendage operable to cause the ramp surfaces of the second part to slide with respect to the complementary ramp surfaces of the first part, providing a transverse component of movement of said second part, relative to said longitudinal direction, which, being limited by the width of said enclosure defined by the two walls, serves to clamp said elongate member between said one of said first surfaces and the adjacent wall.
In one arrangement said first and second appendages are each secured to one of said opposed walls.
In an alternative arrangement said first and second appendages are each secured to said elongate member.
Preferably said first and second parts are identical.
Preferably said first and second parts each have at one end a projection, and at the other end a slot within an adjunct, the two parts interfitting by means of the projection associated with each part being a sliding fit in the slot associated with the other part.
In this case preferably said fixing means consists of a first screwable element which extends through the first of said appendages and passes through said slot associated with the second part to contact said projection of the first part, operation of the first screwable element causing said abutment of the first part to bear against said second appendage.
Similarly said actuation means suitably consists of a second screwable element which extends through said second appendage, and passes through said slot associated with the first part to contact said projection of the second part.
Preferably a spring element acts on said adjunct of the second part, biassing it towards a position such that the clamp mechanism is nonoperative. In this case operation of the second screwable element causes the second part to act against the bias of said spring element.
In an alternative arrangement said actuation means is a lever arrangement which in operation acts on a plunger to cause it to pass slidably through said second appendage and extends into said slot associated with the first part to contact said projection of the second part.
In the latter arrangement said lever arrangement preferably has a position in which the clamp mechanism is locked in its operative position, and the position of said plunger is suitably capable of manual adjustment such that the pressure exerted on the elongate member by the clamp mechanism when in its operative position can be predetermined.
Three clamping arrangements in accordance with the invention will now be described, by way of example only, with reference to the accompanying drawings in which:
Figure 1 is a plan view of a box containing a printed circuit board clamped therein by the first clamping arrangement to be described;
Figure 2 is a cross sectional view of the first clamping arrangement with the mechanism in its operative position;
Figure 3 is a perspective view of part of the clamping arrangement of Figure 2;
Figure 4 is a cross sectional view of a part of the second clamping arrangement to be described with the mechanism in its non-operative position;
Figure 5 is a sectional view along the line V-V in Figure 4 showing a lever arrangement in the non-operative position;;
Figure 6 is a sectional view corresponding to
Figure 5 showing the lever arrangement in the operative position;
Figure 7 is a top end view of the clamp arrangement of Figure 5;
Figure 8 is a view of part of the third clamping arrangement to be described mounted on a printed circuit board, the mechanism being in an operative position;
Figure 9 is a sectional view along the line IX-IX of Figure 8, showing the mechanism in a non-operative position;
Figure 10 corresponds to the view of Figure 9 with the mechanism in an operative position; and
Figure 11 is a view in the direction of the arrow of Figure 10.
Referring firstly particularly to Figure 1 the printed circuit boards 1 (one only being shown) are disposed in the box 3, which has a lid 3a. The lateral marginal portions of each board are located in guide means in the form of slots 5 defined between adjacent pairs of ribs 7a formed on opposite side walls 7 of the box, the ribbed side walls constituting cold walls for dissipating heat generated by the electronic components 8 mounted on one major surface 9 of the board, and also providing physical support for the board. To aid heat dissipation the board 1 carries a heat conductive ladder the cross members (not shown) of which lie in close proximity to the electronic
components 8, and the side members 11 of which extend along the lateral marginal portions 9a of one major surface 9 of the board.In the base 3b of the box there are provided electrical connectors
(not shown) which mate with further connectors
(not shown) provided at the bottom of each of the
circuit boards 1.
Referring now primarily to Figure 2 in respect of
each slot 5 there is provided a removeable
mechanism 12 including two identical, oppositely
directed elements 13, 1 5. Each element has a first flat major surface 1 7. 19 and a second major
surface 21, 23 comprising a regular series of
correspondingly angled ramps extending along the surface 21, 23, each ramp making an angle of 20C with the flat surface 17, 19. The two elements are arranged with their long axes extending vertically within the slot 5 such that the flat surface 1 7 of the first element 13 is directed towards one wall 7a of the slot 5, and the flat surface 1 9 of the second element 15 is directed towards a marginal portion 25a of the major surface 25 of the board 1.The two elements are further positioned such that their respective ramp surfaces 21, 23 fit together in a complementary manner.
As best seen in Figure 3 at opposite ends of each of the elements 13 and 1 5 there is a projection 27 or 29 and an adjunct 31 or 33 through which a slot 35 or 37 extends. The two elements 13, 1 5 are arranged in an interlocking configuration, the projection 27 or 29 associated with each element being a sliding fit in the slot 37 or 35 in the other element.
Referring again particularly to Figure 2, at the bottom of each slot 5, through the base 3b of the box 3 is a tapped hole 39 through which a screw 41 extends into the slot 5. This screw 41 further extends into the slot 37 in the adjunct 33 of the element 15 to contact the end surface of the projection 27 of the element 13. The screw 41 is adjustable to cause the adjunct 31 of the element 13 to abut the underside of a ledge 7b extending perpendicular to the wall 7a at the top of the slot 5, thus securing the element 13 in the slot 5 with its surface 17 against the wall 7a of the slot 5.
A compression spring 43 positioned between the adjunct 33 of the element 15 and the base 3b of the box 3 around the screw 41 serves to bias the element upwardly.
A clamping screw 45 extends through a tapped hole 47 in the ledge 7b and the slot 35 in the adjunct 31 of the element 13 to contact the end surface of the projection 29 of the element 15.
Rotation of the clamping screw 45 serves to push the element 15 downwards within the slot 5 relative to the element 13 against the action of the' spring 43. The mutual sliding of the ramp surfaces 21,23 causes the element 15 to also have a horizontal component of motion which, being constrained by the width of the slot 5 serves to drive the side member 11 a of the heat conductive ladder on the marginal portion 9a of the major surface 9 of the board 1 into intimate contact with the adjacent rib 7a of the cold wall 7.
It will be understood that as the two elements 13, 1 5 are identical, the ramp surfaces are regularly distributed over the surfaces 21, 23 and flat surfaces 17, 19 extending virtually the length of the mechanism are presented to the rib 7a of the wall 7 and the marginal portion 25a of the surface 25 of the board 1, the clamping pressure obtained is evenly distributed over the marginal portion of the board. The clamping action thus provides a solid retention of the board, with good thermal transfer and vibration performance. The action of the clamping screw 45 is positive and responsive since the ramp angle is quite large and the mechanism can tolerate quite large variations in board thickness.
The elements 13 and 15 are suitable precision moulded in reinforced thermosetting or thermoplastic resin to combine strength, repeatability, lightness and low cost. As the elements are identical only one mould need be produced. Assembly of the elements into the slots 5 is quick and simple, and so the elements may be easily replaced if necessary.
Referring now also to Figures 4, 5, 6 and 7, the second clamping arrangement is essentially the same as the first arrangement, with the exception of the clamping screw 45 which is replaced by a lever arrangement. Accordingly the parts of the arrangement shown in Figures 4,5,6 and 7 which are identical to those in the arrangement of the previous Figures are denoted by the same reference numerals.
As can be best seen in Figure 4, to accommodate the lever arrangement, the ledge 7b at the top of the slot 5 is replaced by a ledge 7c extending perpendicularly to the wall 7a, and situated a short distance down from the top of the box 3 into the slot 5. An externally threaded neck section 51 a of an annular housing 51 also having a body section Sic of larger diameter than the neck section joined by a shoulder section 51 b screws into a tapped hole 52 formed through the ledge 7c, trapping a nylon washer 53 between the top of the ledge 7c, and the shoulder section Sib.
Within the body section 51 c of the housing there is a tapped sleeve nut 55 which is a sliding fit within the body section Sic, downwards movement of the sleeve nut being limited by the shoulder section 51 b of the housing. Screwed into the sleeve nut 55 is a threaded adjuster 57, having at its top end a slot 59, and at its lower end a rod portion 61 which extends through the neck section 51 a of the housing into the slot 5, the adjuster and sleeve nut together thus forming a plunger. To the end of the rod portion 61 which extends into the slot 5 is attached a ferrule 63 which further extends into the slot 35 in the adjunct 31 of the element 13 to contact the end surface of the projection 29 of the element 1 5.
The spring 43 acting through the second element
15 tends to push the sleeve nut 55 upwards within the body section Sic of the housing.
At the top end of the body section 51 c of the housing is a circular aperture 65, through which fits a cam shaft 67 of truncated circular cross section. The cam shaft 67 is attached at right angles to a lever 69 in such a way that when the lever 69 is in a vertical position the flat portion 67a of the surface of the cam shaft rests on top of the sleeve nut 55, as shown in Figures 4 and 5.
Through the cam shaft 67 there is a hole 71 positioned such that when the lever is in its vertical position, the hole is coaxial with the housing 51, and the slot 59 in the adjuster 57 is accessible to, for example, a screwdriver as best shown in Figure 7.
To effect movement of the second element 15 relative to the first element 13 to achieve a clamping action, as explained above in relation to the first clamping arrangement, the lever 69 is rotated within the aperture 65 from its vertical position to a horizontal position. As depicted in
Figure 6, as the distance of the curved surface 67b of the cam shaft 67 from the centre of rotation, is further than that of the flat surface 67a, the sleeve nut 55 is pushed downwards within the body section 51 c of the housing through the distance d indicated in the drawings, the ferrule 63 thus pushing the second element 15 downwards within the slot 5.
Adjustment of the clamp mechanism to tolerate differing board 1 thicknesses, and also predetermination of the pressure to be exerted by the clamp mechanism can be achieved by means of the positioning of the threaded adjuster 57 within the sleeve nut 55 when the lever 69 is in its vertical position as indicated above. This gives an adjustment range of a distance x as indicated in
Figure 4 of the drawings. The sleeve nut 55 is prevented from rotating within the body portion 51 c of the housing during such adjustment by the abutting cam shaft 67. Typically the adjustment range x is 3.2 mm. thus allowing the clamp mechanism to be effective over a wide range of circuit board thicknesses, whilst the locking action distance dis 0.4 mm.
It will be appreciated that the position of the lever 69 gives an indication of whether the clamp is operative, i.e. whether the lateral portion of the board 1 is maintained in close contact with the cold wall rib 7a. It will also be appreciated that the box lid 3a can only be fitted on the box 3 when the clamp is operative, i.e. the lever is in a horizontal position, the nylon washer 53 allowing the housing 51 to be rotated within the tapped hole 52 so that the axis of rotation of the lever 69 is at right angles to the board 1.
Referring now also to Figures 8, 9, 10 and 11 the third clamping arrangement is similar to the second arrangement, except that the mechanism is attached to the printed circuit board 1 rather than being attached to the box. This third clamping arrangement is housed in a box similar to that described in relation to the first clamping arrangement except that it has ribs 100 which do not have ledges and there are no tapped holes in the base of the box.
Referring particularly to Figure 8, in respect of each lateral margin of each board 1 there is provided a U-section channel member 81, the web portion of which extends along the marginal portion 25a of the board on the surface 25 of the board opposite to the side members 11 of the heat conductive ladder. Referring now also to
Figure 9, the channel member 81 is secured by rivets 83, 85 through its web to the board 1, the channel member extending slightly beyond the upper end of the board.Two elements 87, 89 similar to the elements 13, 1 5 described in the previous arrangements, lie within the channel member 81, with the flat surface 91 of the element 87 lying along the web of the channel member, the respective ramp surfaces 95, 97 of the two elements fitting together in a complementary manner as described herebefore in relation to the other arrangements.
At the lower end of the board 1, attached to the channel member 81 is a post 99, having a tapped hole through which a screw 101 extends to contact the end surface of a projection 103 of the element 89. A compression spring 105 is positioned between the adjunct 107 of the element 87 and the post 99.
At the top end of the board is a lever arrangement similar to that described in the second clamping arrangement. This consists of a housing 109 which fits in, and is attached to the upper end of the channel member 81. Within a bore formed in the housing 109 and extending in the direction of the length of the channel member
81 there is a tapped sleeve nut 111 which is a slidable bit within the bore. Screwed into the sleeve nut 111 is a threaded adjuster 113, having
a slot 115 formed at its upper end, the Idler end
of the adjuster extending into the slot 11 7 in the
adjunct 119 of the element 89 to contact the end
surface of the projection 121 of the element 87.
The spring 105, acting through the element 89
tends to push the sleeve nut 111 upwards within
the housing 109.
At the top end of the housing 109 is a circular
aperture 123, through which extends a cam shaft
125 similar to that described in the second
clamping arrangement, a lever 127 again being
attached to the cam shaft. The cam shaft 125 also
extends through a corresponding circular aperture
129 in the part of the web of the channel 81
which extends beyond the top of the circuit board
1. The flat portion 1 25a of the surface of the cam
shaft rests on top of the sleeva nut 91 when the
lever 127 is in a vertical position as shown in
Figure 10. With the lever 127 in this position the
slot 115 in the adjuster 113 is accessible to a
screwdriver, and thus adjustment of the position
of the adjuster within the sleeve nut 111 is
possible.
As explained in relation to the second clamping
arrangement a clamping action is achieved by
positioning the adjuster within the sleeve nut so that the mechanism and board assumes the approximate width of the slot formed between the
ribs 100, and then rotating the lever 127, and
hence the cam shaft 125 within the apertures
123, 129 such that the lever 127 is in the position
shown in Figures 8, 10 and 11.
A A second, independent lever 131 is pivoted to
the first major surface 9 of the board at 133 as
shown in Figure 8. This lever has a nose portion
135 positioned so that when the board 1 is fully
inserted in a slot in the box, it contacts the top
surface of one of the walls 100. Hence when the
clamping arrangement is inoperative, rotation of
the lever 131 clockwise as viewed in Figure 8, will
cause the nose portion 135 to lean on the wall
100, to aid the extraction of the connector at the
lower edge of the board 1 from the mating
connector at the base of the box.
It will be appreciated that whilst in the third
clamping arrangement described herebefore with
reference to Figures 8 to 11 the mechanism is
actuated by a lever arrangement, a mechanism
actuated by a clamping screw arrangement as
described in the first clamping arrangement of
Figures 2 and 3 may alternatively be used in an
arrangement in which the mechanism is attached to tothe member e.g. printed circuit board which the
arrangement serves to clamp.
Claims (16)
1. A clamp arrangement for clamping an
elongate member extending between two opposing, substantially parallel walls incorporating a mechanism including: first and second removeable parts each having a first substantially flat surface, and a second oppositely directed surface consisting of a series of correspondingly angled ramps extending along the length of the surface, the two parts being disposed between said two walls so as to extend in a longitudinal direction within an enclosure defined by said two walls, and being oppositely directed with respect to each other, and positioned such that said first surface of the first part faces one of said walls, and said first surface of the second part faces the other of said walls, with the elongate member between one of said first surfaces and the adjacent wall and the respective ramp surfaces associated with each of said first and second parts fitting together in a complementary manner; fixing means mounted through a first appendage, to hold said first part in a substantially fixed position relative to said one of said walls; and actuation means mounted through a second appendage operable to cause the ramp surfaces of the second part to slide with respect to the complementary ramp surfaces of the first part, providing a transverse component of movement of said second part relative to said longitudinal direction which, being limited by the width of said enclosure defined by the two walls, serves to clamp said elongate member between said one of said first surfaces and the adjacent wall.
2. A clamp arrangement according to Claim 1 in which said first and second appendages are each secured to one of said opposed walls.
3. A clamp arrangement according to Claim 1 in which said first and second appendages are secured to said elongate member.
4. A clamp arrangement according to Claim 3 in which said appendages are at opposite ends of a channel member secured to said elongate member and within which said first and second members lie.
5. A clamp arrangement according to Claim 4 in which said channel member is of substantially
U-shaped section and is secured to the elongate member with its web contacting said elongate member.
6. A clamp arrangement according to any one of the preceding claims in which said first and second parts are identical.
7. A clamp arrangement according to any one of the preceding claims in which said first and second parts each have at one end a projection and at the other end a slot within an adjunct, the two parts interfitting by means of the projection associated with each part being a sliding fit in the slot associated with the other part.
8. A clamp arrangement according to Claim 7 in which said fixing means consists of a first screwable element which extends through the first of said appendages and passes through said slot associated with the second part to contact said projection of the first part, operation of the first screwable element causing said abutment of the first part to bear against said second appendage.
9. A clamp arrangement according to Claim 7 or Claim 8 in which said actuation means consists of a second screwable element which extends through said second appendage, and passes through said slot associated with the first part to contact said projection of the second part.
10. A clamp arrangement according to any one of
Claims 7 to 9, in which a spring element acts on said adjunct of the second part, biassing it towards a position such that the clamp mechanism is non-operative.
11. A clamp arrangement according to any one of Claims 1 to 6 in which said actuation means is a lever arrangement which in operation acts on a plunger to cause it to pass slidably through said second appendage and extends into said slot associated with the first part to contact said projection of the second part.
12. A clamp arrangement according to Claim 10 or Claim 11 in which said lever arrangement comprises a member providing a cam surface which on operation of the lever arrangement acts on the end of the plunger remote from said projection of the second part to cause the other end of the plunger to contact said projection of the second part.
13. A clamp arrangement according to Claim 11 or Claim 12 in which said lever arrangement has a position in which the clamp mechanism is locked in its operative position, and the position of said plunger is suitably capable of manual adjustment such that the pressure exerted on the elongate member by the clamp mechanism when in its operative position can be predetermined.
14. A clamp arrangement for clamping an elongate member extending between two opposing, substantially parallel walls, substantially as hereinbefore described with reference to
Figures 2 and 3 or Figures 4 to 7 or Figures 8 to 10 of the accompanying drawings.
15. A mechanism adapted for mounting on an elongate member to form a clamping arrangement according to Claim 3, 4 or 5 or any one of Claims 6 to 14 when dependent on Claim 3.
16. A printed circuit board having secured to a marginal edge thereof a mechanism according to
Claim 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08220405A GB2103020B (en) | 1981-07-30 | 1982-07-14 | Clamp arrangements for cooling electrical circuits |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8123353 | 1981-07-30 | ||
| GB08220405A GB2103020B (en) | 1981-07-30 | 1982-07-14 | Clamp arrangements for cooling electrical circuits |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2103020A true GB2103020A (en) | 1983-02-09 |
| GB2103020B GB2103020B (en) | 1985-03-20 |
Family
ID=26280297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08220405A Expired GB2103020B (en) | 1981-07-30 | 1982-07-14 | Clamp arrangements for cooling electrical circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2103020B (en) |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2166004A (en) * | 1984-10-19 | 1986-04-23 | Camloc Ind Fixing | Printed circuit board mounting apparatus |
| FR2575024A1 (en) * | 1984-12-19 | 1986-06-20 | Snecma | Fixing and heat-transfer device for a card carrying electronic components |
| US4721155A (en) * | 1986-05-07 | 1988-01-26 | United Technologies Corporation | Sawtooth card retainer |
| DE3644173C1 (en) * | 1986-12-23 | 1988-06-16 | Messerschmitt Boelkow Blohm | Clamping element for printed circuit boards |
| US4751963A (en) * | 1986-07-03 | 1988-06-21 | Hughes Aircraft Company | Thermal conductance retainer for electronic printed circuit boards and the like |
| EP0289686A1 (en) * | 1987-05-07 | 1988-11-09 | United Technologies Corporation | Spring loaded multi-wedge card retainer |
| EP0308584A1 (en) * | 1987-09-25 | 1989-03-29 | Deutsche Aerospace AG | Retainer for electronic cards |
| US4829402A (en) * | 1987-06-30 | 1989-05-09 | Lockhart Industries, Inc. | Circuit board retainer and panel assembly |
| US4953059A (en) * | 1986-03-06 | 1990-08-28 | United Technologies Corporation | Spring loaded multi-wedge card retainer |
| DE3937961A1 (en) * | 1989-11-15 | 1991-05-16 | Telefunken Systemtechnik | Clamping system for circuit plates in housing - has threaded elements moved by screw bar to clamp against housing |
| US5220485A (en) * | 1990-04-18 | 1993-06-15 | Harris Corporation | Heat removing edge guide system and related method |
| FR2717342A1 (en) * | 1994-03-11 | 1995-09-15 | Thomson Csf | Retractable pcb support for magnetic circuit |
| WO2000041450A1 (en) * | 1998-12-30 | 2000-07-13 | Honeywell Inc. | Adapter kit to allow extended width wedgelock for use in a circuit card module |
| WO2004093510A1 (en) * | 2003-04-07 | 2004-10-28 | Honeywell International Inc. | Electronic assemblies having supports for circuit boards |
| WO2008147902A3 (en) * | 2007-05-22 | 2009-01-29 | Material Innovations Inc | Retainer and thermal displacement apparatus for electronic components |
| WO2011090920A1 (en) | 2010-01-20 | 2011-07-28 | Wavetherm Corporation | Wedge based circuit board retainer |
| FR2979793A1 (en) * | 2011-09-02 | 2013-03-08 | Airbus Operations Sas | Clamping device for clamping electronic module i.e. electronic board, in slideway in aircraft, has control unit that is placed laterally with regard to support element and bit according to orthogonal axis in plane defined by axis |
| WO2017093112A1 (en) * | 2015-12-01 | 2017-06-08 | Melecs Ews Gmbh | Electronic device having a cooling apparatus, and an associated assembly method |
| EP3270671A1 (en) * | 2016-07-11 | 2018-01-17 | Hamilton Sundstrand Corporation | Zero insertion force card guide |
| DE102017127607A1 (en) * | 2017-11-22 | 2019-05-23 | Liebherr-Elektronik Gmbh | Fixing device for fixing one or more printed circuit boards to a housing wall |
-
1982
- 1982-07-14 GB GB08220405A patent/GB2103020B/en not_active Expired
Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2166004A (en) * | 1984-10-19 | 1986-04-23 | Camloc Ind Fixing | Printed circuit board mounting apparatus |
| FR2575024A1 (en) * | 1984-12-19 | 1986-06-20 | Snecma | Fixing and heat-transfer device for a card carrying electronic components |
| US4953059A (en) * | 1986-03-06 | 1990-08-28 | United Technologies Corporation | Spring loaded multi-wedge card retainer |
| US4721155A (en) * | 1986-05-07 | 1988-01-26 | United Technologies Corporation | Sawtooth card retainer |
| EP0245195A3 (en) * | 1986-05-07 | 1988-02-24 | United Technologies Corporation | Sawtooth card retainer |
| US4751963A (en) * | 1986-07-03 | 1988-06-21 | Hughes Aircraft Company | Thermal conductance retainer for electronic printed circuit boards and the like |
| DE3644173C1 (en) * | 1986-12-23 | 1988-06-16 | Messerschmitt Boelkow Blohm | Clamping element for printed circuit boards |
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| WO2004093510A1 (en) * | 2003-04-07 | 2004-10-28 | Honeywell International Inc. | Electronic assemblies having supports for circuit boards |
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| WO2008147902A3 (en) * | 2007-05-22 | 2009-01-29 | Material Innovations Inc | Retainer and thermal displacement apparatus for electronic components |
| US8764338B2 (en) | 2007-05-22 | 2014-07-01 | James Charles Calder | Retainer and thermal displacement apparatus for electronic components |
| EP2526746A4 (en) * | 2010-01-20 | 2017-04-05 | Wavetherm Corporation | Wedge based circuit board retainer |
| WO2011090920A1 (en) | 2010-01-20 | 2011-07-28 | Wavetherm Corporation | Wedge based circuit board retainer |
| FR2979793A1 (en) * | 2011-09-02 | 2013-03-08 | Airbus Operations Sas | Clamping device for clamping electronic module i.e. electronic board, in slideway in aircraft, has control unit that is placed laterally with regard to support element and bit according to orthogonal axis in plane defined by axis |
| WO2017093112A1 (en) * | 2015-12-01 | 2017-06-08 | Melecs Ews Gmbh | Electronic device having a cooling apparatus, and an associated assembly method |
| EP3270671A1 (en) * | 2016-07-11 | 2018-01-17 | Hamilton Sundstrand Corporation | Zero insertion force card guide |
| DE102017127607A1 (en) * | 2017-11-22 | 2019-05-23 | Liebherr-Elektronik Gmbh | Fixing device for fixing one or more printed circuit boards to a housing wall |
| US10973145B2 (en) | 2017-11-22 | 2021-04-06 | Liebherr-Elektronik Gmbh | Fixing apparatus for fixing one or more printed circuit boards to a housing wall |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2103020B (en) | 1985-03-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |