Method for crimping wet spun cellulose triacetate
US 3201747 A
Abstract available in
Claims available in
Description (OCR text may contain errors)
Aug. 17, 1965 L. BLANCHET 3,201,747
MIXED TYPE TERMINAL SUPPORTS, AND CORRESPONDING TERMINAL BARS Filed Dec. 29. 1961 3 Sheets-Sheet 1 'Aug. 24, 1965 .1.- w SOEHNG EN METHOD FOR CRIMPING WET SPUN CELLULOSE TRIACETATE Filed April 26, 1961 5 Sheets-Sheet 2- Aug. 24, 1965 ,1. w. SOEI- INGEN METHOD FOR CRIMPING WET SPUN CELLULOSE TRIACE'I'ATE s Sheets-Sheet 3 Filed April 26, 1961 .-W @W w 3,291,747 MKXED TYPE TERMINAL SUPPORTS, AND QURRESPSNIIKNG TERMINAL BARS Lucien itianchet, 35 Rue du Qinq Mars, Colombes, Seine, France Filed Dec. 29, 1951, Ser. N 163,199 Claims priority, application France, Jan. 5, 1961, 84%,911, Patent 1,2845%; Dec. 14, 1961, 882,002, Patent 84%,791 The portion of the term of the patent subsequent to Feb. 12, 197i has been disclaimed 5 Qlaims. (ill. 339-498) This invention relates to a new mixed type terminal support of insulating plastic material which is adapted to cooperate by sliding or clipping with the assembly rail of a connection bar for electric conductors, the said mixed support being characterized by the fact that it has at its upper part at least one central metal terminal the base of which is buried in the plastic material, and at its bottom part a metal connecting element with double wire clamp, this mixed support making it possible either to connect together separately the conductors connected to each metal terminal and those connected to the aforesaid connecting element wtih double wire clamp, while the latter may if desired be earth conductors for the earthing of the metal sheaths of the conductors connected to the aforesaid metal terminals, or on the other hand to connect together all the conductors connected on the said mixed support, in such a manner for example as to obtain from a common entry conductor a large number of branches corresponding to all or part of the other conductors connected to the said mixed supports; while .a looping conductor between a central terminal and the connecting ele ment with double wire clamp can if desired be provided when the said connecting element is insulated from the said metal terminal or terminals.
The metal connection element provided at the bottom part of the mixed insulating support can be buried in the insulating material constituting that support, or may be introduced through the bottom into the said insulating support after the latter has been moulded, and can be then immobilized by clipping to the bottom part of the said support before the latter is mounted on a bar, the said bottom part having for that purpose suitable internal bosses.
The aforesaid metallic connection element may also be introduced by the side into a suitable cavity provided between two blocks of moulded insulating material solid with a plate of slight thickness forming an intermediate partition between neighboring supports, and may be locked in the said cavity by friction by means of a rib provided with bosses cooperating with a cavity out into the bottom middle portion of the said connecting element.
The mixed support according to the invention may also have on its front faces or at the top part of one of the two aforesaid blocks of insulating material, labeling grooves provided above the orifices permitting connection of certain conductors to the said metal connecting element.
The mixed support may likewise have bosses permitting the mixing of individual covers of suitable shape, or intermediate partitions adapted to cooperate with covers serving to protect the terminals corresponding to the condoctors of each of the circuits connected to the bar.
These bosses are housed in the upper part of the aforesaid thin plates in the corresponding embodiment, so as to cooperate directly with covers of circuits of different shape which may be mounted to pivot around circular nipples provided on the end partitions of the bar or on certain intermediate partitions acting as circuit separators.
The mixed supports having thin plates can be mounted to be contiguous on the bars and all directed in the same United States Patent 0 direction, each thin plate then forming an intermediate partition in relation to the neighboring support.
They may also be mounted in alternating directions, so as to permit shunting between neighboring terminals.
The mixed supports having thin plates can likewise be provided with an additional intermediate partition provided with nipples adapted to cooperate by clipping with cavities provided in the two aforesaid blocks of insulating material, so as to insulate the said metallic connecting element completely.
At its upper part the said additional partition may have the same shape as the aforesaid thin plate, or on the other hand may be of smaller height in order to permit shunting between neighboring terminals.
In the case of the said metallic connecting members are provided to efiect the simultaneous earthing of metal sheaths enclosing the diiferent conductors, the bars pro-- duced by means of the said mixed supports may in addi-- tion have, either on the assembly rails, or on metal terminal clamps cooperating with the said rails a general terminal permitting simultaneous earthing of all the metal connecting elements of the double wire clamp type of the different supports of the same bar, and also the as-- sembly rail and the metal terminal clamps of the said ban.
Independently of the possibilities of shunting the ter-- minals, the metal connecting elements belonging to neigh-- boring supports of a bar can likewise be shunted by means of external looping conductors, preferably con nected on the same side of the said bar in relation to the metal terminals of the latter.
When the bars are designed to be equipped with pivoting circuit covers, half of the bosses provided on the upper part of the aforesaid thin plates, and the additional intermediat partitions if provided, effect the closing by clipping of the said covers, the other half of the said bosses supporting the interior of these covers in the hori zontal closed position of the latter.
The said pivoting covers are preferably provided with a set of inside grooves and a set of outside grooves adapted to receiv two reference labels visible respectively before and after closure of the said covers, while the labels introduced into the inside grooves can also be printed back and front in order to permit reading by transparency of the printing shown on the back, through the slight thickness of the translucent plastic material of which the said covers are made.
When the metal connecting element is solid with at least one terminal and is designed to be introduced from the side, the top insulating block of the mixed support must have over half its thickness slots for the passage of the terminal screws, the base of which is solid with the said metal connecting element.
Other characteristics of the present invention will be better understood on reading the following description of various forms of construction of mixed supports and bars according to the invention, which are given by way of non-limitative example, this description being given with reference to the accompanying drawings, in which:
FIGURE 1 is a View in perspective of a first form of construction of a mixed support according to the invention.
FIGURE 2 is a view in perspective, exploded at the bottom part, of the same form of construction of a mixed support, before assembly by clipping of the double wire clamp connecting element.
FIGURE 3 is a longitudinal section through the mixed support shown in FIGURE 1, on the line III-III in FIG- URE 4.
FIGURE 4 is a vertical section of the same mixed support along the line in FIGURE 3.
FIGURE 5 is an exploded perspective view of a second form of construction of a mixed support, designed for introduction of the double wire clamp connecting element from the side.
FIGURE 6 is a median section of the mixed support shown in FIGURE 5, after mounting of the double wire clamp connecting element.
FIGURE 7 is an exploded view in perspective of the bar constituted by juxtaposition of mixed supports of the type illustrated in FIGURES 1 to 4.
FIGURE 8 is a view in perspective of a pivoting cover adapted to be clipped on nipples on end partitions or on intermediate insulating partitions acting as circuit separators.
FIGURE 9 is a section showing the method of cooperation of a circuit cover in FIGURES with the bosses provided at the top part of the mixed supports of the type illustrated in FIGURES and 6, and with the articulation and closure nipples provided on the end partitions or circuit separators of the corresponding bars.
FIGURE is a longitudinal view in elevation, with partial section, of a bar equipped with mixed supports of the type illustrated in FIGURES 5 and 6, and provided with pivoting circuit covers.
FIGURE 11 is a section of a mixed support of the type illustrated in FIGURES 1 to 4, equipped for the purpose of connecting a common inlet conductor to five different outlet conductors, and
FIGURE 12 is a section of a third form of construction of a mixed support comparable to that shown in FIG- URE 11, but comprising two terminals connected metallically to the double wire clamp connecting element, this third embodiment consequently making it possible to connect a common inlet conductor to seven different outlet conductors.
It is seen in FIGURE 1 that the new support has in its middle part a raised insulating portion 1 inside which is buried the head 2 of a central terminal, of which the screwthread is visible at 3 in the different FIGURES 1 to 3.
In FIGURES 1 and 2 are also seen nipples4 permitting the fixing of individual covers or intermediate insulating partitions for the central terminals.
It is obvious that the head 2 can be immobilized by any suitable means inside the insulating material, so as not to be able to turn in relation to the latter, and may in particular have a bore parallel to the assembly rail and filled with insulating material during the molding, thus forming an assembly. plug.
The support visible in FIGURES 1 to 3 also has on its front faces grooves 5 intended to receive marking labels.
In FIGURES 2 and 3 can be seen the double wire clamp connecting element 6 which is buried in the lower part of the terminal support at sufiicient distance from the assembly rail to permit suitable insulation between the said rail and the said connecting elements when the latter are not used for earthing an assembly of metal sheaths surrounding different high-frequency conductors connected to the different terminals 3.
The conductors intended to cooperate with the element 6 enter through bores 7 which can be seen in FIGURES 1 to 3, the conductors then passing into the bores 8 provided in the element 6, the conductors being clamped by means of pressure screws 9 which may cooperate with devices making it possible to prevent the shearing of the conductors by the end of the said screws 9, and with insulating braking pins 9;: inserted in two bores visiblein FIGURES 2, 3, and 4.
In FIGURES 2 and 3 it is seen that in the embodiment equal to thatof the nipple 4 and intended to hold in position the base of intermediate partitions having a thickness equal to twice that of the nipples 4, so as to permit contiguous assembly neighboring supports.
The double wire clamp metallic connecting element illustrated in FIGURE 5 and designated by the reference numeral 13 is of a known type having clamp shoes preventing the shearing of the conductors subjected to the action of the clamp screws.
The top part of this connecting element is housed inside a cavity 14 provided in a block 15 of moulded insulating material solid with a thin plate 16 serving as intermediate partition in relation to the neighboring mixed supports, the base portion 13a of the said connecting element bearing against a second block 17 of molded insulating material likewise solid with the plate 16.
This base has a cavity 18 cut in it, inside which is placed a rib 19 of the block 17, this rib being provided with two increased thicknesses 7,0 rubbing against the said cavity, while its elasticity permits the locking of the connecting element 13.
In this embodiment, the block 15 has two grooves 21 inside which there may for example be placed two reference labels for the terminal support in question, and the indication of the reference can be read by transparency through the insulating material constituting the said mixed support.
The block 15 is in addition pierced with two bores 22 permitting the passage of a screw-driver controlling the turning of the screws 23 of the connecting element 13.
As has been indicated above, the mixed supports constituted by the assembly of the blocks 15 and 17 and of the plate 16 are designed to clip at their bottom part on assembly 'rails of bars of conventional type.
They may be juxtaposed one behind the other and directed all in the same direction, or they may be directed inopposite directions when shunting is desired between the terminals placed at the upper part of two neighboring mixed supports, while an intermediate partition can be provided either solely at the level of the connecting elements or over the entire height of the mixed support, the said intermediate partition 24, provided with connecting nipples 25illustrated in broken lines in FIGURE 5 and adapted to cooperate with three cavities 26 in the block 15, preventing in particular all contact between the central terminals 27 of neighboring mixed supports when the said supports are directed face to face.
The intermedite support 24 has bosses 28 similar to those of the plate 16 and intended to cooperate with a special cover, as will be seen from the description referring to FIGURES 8 and 9.
The bottom part 13a of the connecting element 13 is likewise visible in FIGURE 6, as well as the rib 19 and the bottom nipple 25 of the intermediate partition 24.
At 29 in FIGURE 7 is seen a type of intermediate partition having a narrower base and adapted to be held in position by the cooperation of the edges 12a of this base with the aforesaid shoulders 12. The edges 30 of these plates take up position against the inside portion 31 of the bosses 32 visible in FIGURES 1 to 3, inside which bosses are provided bores 33 permitting the operation of the screws 9.
The bar illustrated in FIGURE 7 in exploded perspective view has an assembly device 34 the rail of which is shown broken,,while a section of it is visible at 34a.
In the left-hand part of FIGURE 7 three contiguous terminal supports have been shown. It is possible to see the position taken up, after mounting on nipples 4, by three intermediate plates 29 similar to those illustrated on the right-hand half of the figure.
At the right-hand end of the assembly device 34 is illustrated. an end plate 35 assumed to be mounted on the aforesaid device Y34 and having nipples 36 permitting the fixing of a'cover 37.
At the other end of the cover 37 is situated a second end plate 35, illustrated unmounted, and adapted to cooperate by clipping with the device 34, the nipples 36 being illustrated in broken lines on the said plate.
It is quite clear that the assembly of the intermediate plates, the end plates, and the cover 37 could be replaced by individual covers supported on nipples 4 and likewise etlecting the insulation between contiguous terminals 3.
At the left-hand end of FIGURE 7 is illustrated a terminal clamp 38 which can be immobilized in relation, to the device 34 by means of a screw 39, the end of which is riveted on the middle portion of an anchoring spring 49, and the clamping of which tends to lock the claws 41 of the said terminal clamp against the bottom part of the bosses 42 of the assembly device 34, the base of the said anchoring spring bearing against the lower part of the device 34.
In the example illustrated in FIGURE 7, it has been assumed that all the conductors 43 and 43a connected respectively to the different terminals 3 and entering from the two sides of the bar are conventional highfrequency coaxial conductors having a conductive metal sheath insulated from the central conductor by an intermediate insulating sheath.
Metal sleeves 44 and 44a, which are often called ferrules, make it possible to connect electrically the metal sheaths or the conductors 4?), 43a to the two series of earthing conductors designated respectively by the reference numerals 45 and 46 for the conductors arriving from the front of the bar, and by the reference numeral 45a for the conductors arriving from the rear of the bar.
The conductors 45 and 45a are respectively designed to connect the metal sheaths of two symmetrical conductors 43 and 43a connected on the same terminal 3 to a Connecting element 6 situated in line with the said terminal.
With regard to the conductors 4d, they serve to connect the metal sheaths of the different conductors 43 to the connecting elements 6 or" the neighboring mixed supports, all of the said elements 6 and metal sheaths being thus brought to the same electrical potential.
On the left-hand part of FIGURE 7 it is seen that the last conductor 46, connected to the metal sheath of a conductor 43 connected to the last terminal of the bar, is connected to a terminal 47 which is shown mounted on the metal terminal clamp 38 but which could also have been mounted for example on the assembly device 34, the terminal 47 thus permitting the simultaneous earthing of all the metal sheaths of conductors, of all the connecting elements 6, of the terminal clamps 38 in electrical contact with the assembly rail 34, and of the said rail itself.
It should be observed that the plates 35 could be replaced by end plates of a slightly different shape and designed to be mounted by clipping on the nipples 4 of the last terminal supports, instead or" being mounted direct on the assembly device 34.
It is also possible to provide assemblies of insulating material forming at the same time terminal clamps and end partitions, the terminal 47 being then necessarily mounted on the rail 34.
It has similarly been assumed that the metal sheath of the conductors 43a has only one wire 45a connecting to the element 6 of each terminal support, without providing a second looping conductor running to the connecting element 6 of the neighboring terminal support.
It is easy to understand that the siting of the looping connections is immaterial, and that it would for example be just as easily possible to provide looping connections placed alternately on one side and on the other side of the bar, on sheaths of conductors 43 and 43a connected respectively to successive terminals.
FIGURES 8 and 9 illustrate a circuit separator 48 on which there are mounted, on each side of the partition constituting it, nipples 49 which are adapted to clip at the ends of the profiled cover 52 inside the cavity 50 formed by the rolled edge 5'1 of the said cover.
It is also possible to mount the said cover on the nipples 49' by opening out the top part of the said separator 43, the elasticity of the material constituting the said separator making it possible to introduce the nipple 49 into the end of the cavity St).
The clipping of the rolled edge 51 is effected by first placing the cover 52 in the vertical position.
The bar can then be closed by pivoting the cover 52; around the nipples 4% as far as the horizontal position shown in FIGURE 9, the other edge 53 of the said cover clipping over the nipples 54 of the circuit separators 48.
This clipping of the edge 53 on the nipples 54 is efiected at the same time as it is clipped on to the different bosses 28 of the intermediate partitions 24 or plates 16, which are turned in the same direction as the nipples 54.
It shouldbe observed that the nipples 49 and 54 shown in FIGURE 8 have been placed on each side of the circuit separator 48 at the same height.
In other cases, it is possible, particularly when using, particularly for certain circuits, single terminal supports mounted on a bar equipped, for other circuits, with mixed supports, to stagger in height the nipples placed on each side of the partitions 43, so as to place difieren-t covers 52 at different heights, the intermediate partitions 34 having in this case a smaller height on one of the two circuits.
The covers 52 each have two external longitudinal grooves 55, between which it is possible for example to place a label for identification of circuits, and two inside longitudinal grooves 56 between which it is possible for example to place a label identifying conductors, which label can moreover be printed on both sides, so as to avoid using the grooves 55, the transparency of the insulating material used making it possible, after the covers 52 are closed, to read the printing provided on the reverse side, for example for the identification of circuits.
The same elements are found in FIGURE 9: pivoting nipples 49, closure clip nipples 54, terminal 27, grooves 55 and 56, cover shown in section, in solid lines, with the reference numeral 52, and in chain-dotted lines in the open position, with the reference number 52a.
In this figure it is seen that in the closed position of the lid 52, one of the bosses 28 of each of the intermediate partitions 24 or of the plates 16 comes to support the inside face of the said cover, while the edge 53 is clipped on the nipples 54 and on the other boss 28 of the said partitions or plates.
In FIGURE 10 there is illustrated a bar comprising an assembly rail 57, with terminal clamps 5? of insulating material, end partitions 59 having pivoting nipples 49a and clip nipples 540:, a circuit separator 43, two pivoting nipples 49, and two clip nipples 54. I
The cover 52 is shown in section on the right-hand part of FIGURE 10, while it is shown in elevation in th closed position on the left side of that figure.
FIGURE 11 shows a diagram of connection of conductors to the mixed support illustrated in FIGURES 1 to 4, making it possible to branch oil current to five different conductors from a common-entry conductor connected to the terminal 3.
The common-entry conductor, designated by the reference numeral 6%, is clamped under the nut 3a cooperating with the terminal 3. The said terminal permitting the clamping of four conductor tags, placed respectively two by two on each side of the plane of symmetry of the bar, three branches are first obtained corresponding respectively to the conductors 61, 52 and 63.
The conductor 63 being connected at its other end to the double-wire clamp connecting element 6, which in turn is connected to three other conductors designated respectively by the reference numerals 64, 65 and 66, there are thus obtained five branches in all, corresponding to the five conductors 61, 62, 64, s5 and 66.
The double-wire clamp connecting element 67 shown in FIGURE 12 is solid metallically with two terminal screws 68 cooperating with nuts 68a. Each terminal 68 permitting the clamping of two conductor tags arriving from the corresponding side of the mixed support, it is seen that a common entry conductor 69 makes it possible to feed seven different branches corresponding to the conductcrs 70 to 76 inclusive.
It is clearly understood that it is possible to make various changes, improvements, or additions to the embodiments described, or to replace certain devices by equivalent devices, without thereby altering the general economy of the invention.
What is claimed is:
1. A terminal-carrying bar for attachment to a transverse rail, said bar comprising an integral outer member of resilient electrically insulating material provided with depending snap-attaching means for snapping it directly onto said rail an elongated integral inner member of electrically conductive material gripped within and covered by said outer member, electrical contact means near the opposite ends of and permanently electrically connected by said inner member, and an electrical terminal carried on and projecting upwardly from said outer member, said terminal being seated in a portion of said outer member above said inner member and being insulated thereby from said inner member, said outer member extending below said inner member and insulating it from contact with said rail.
2. A terminal carrying bar as claimed in claim 1 in which said outer member is provided with a recess dimensioned and shaped to matingly receive said inner member and with inwardly projecting means on at least one of two opposite walls of said recess past which said inner member can be forced only by yielding of said resilient outer member, so that said inner member is snapfitted into said recess.
3. A terminal carrying bar as claimed in claim 1 in which the inner member is electrically connected to a pair of electrical terminals.
4. A terminal carrying bar as claimed in claim 1 in which one side of said outer member is provided with a recess adapted to receive said inner member, said recess being defined between an upper outer member portion carrying said terminal, and a lower outer member portion carrying said depending means, said portions being connected by an intermediate plate forming the third side of said recess, said inner and outer members being formed with an interfitting tongue and groove, said tongue being a force-fit within said groove and serving to hold said inner member in place within said recess.
5. An assembly comprising a plurality of bars as claimed in claim 1 mounted on a common rail, a grounding terminal carried on said rail, high frequency lines connected to said central terminals, and grounding ferrules on said high frequency lines connected to said gounding terminal.
References Cited by the Examiner UNITED STATES PATENTS JOSEPH D. SEERS, Primary Examiner.
ALFRED S. TRASK, Examiner.