FR2474773A1 - SAFETY SOCKET FOR TUBULAR LAMP WITH AXIAL CULOTS - Google Patents

Abstract

1. A safety socket for a tubular lamp having axially opposed bases, comprising elastic means (13) disposed between one base (21) of the lamp and a mount (14), these means being adapted to maintain the lamp by a clamping action exerted axially against the bases, and means (12, 36) capable of being connected to an electric supply circuit, characterized in that the safety socket comprises a cap (9) comprising two parts (10, 11) assembled together by telescopic mounting, hereinafter called for convenience sake casing (10) and sleeve (11) ; the said casing (10) being removably interfitted on a mount (14), the said cap accommodating elastic means, whilst means (12, 36) associated with the cap (9) and the mount (14) are adapted to establish an electrical connection with a supply circuit.

Description

The present invention relates to sockets intended for

  support and supply power to a lamp

tubular with axial caps.

  We already know descubbles of this kind adapted to be attached to a support and which comprise a piston subject

  the action of a spring, so that the lamp of the type

  top is held by pinching between two bushings, the pistons being otherwise connected by drivers, to the

electrical network.

  Sockets of the above kind have a disadvantage

  according to which the caps of the lamp have an outer part with respect to the sockets, so that when

  manipulations of the lamp, for its replacement or sim-

  For its installation, the operator may touch the caps where serious accidents may result, if the

  pads are under electrical voltage.

  According to other embodiments, the sockets are mounted

  on a support and it is necessary to move

  at least one socket to remove

  or setting up a lamp; in such a situation

  the risks mentioned above are found, but

  are further aggravated by the fact that the operator must

ler the bushings.

  According to yet another embodiment, the caps of the lam-

  pes are engaged in elastic clamps fixed on a support, the connection to the network being made through the

say tongs.

  As in the embodiments above, the risk of an accident can arise during the handling of

the lamp.

  It follows from the provisions mentioned above that the configuration of the current sockets, intended for tubular lamps with axial caps, leave within reach of the hands of

  the operator of the elements that can be under electrical tension.

  The subject of the present invention is a bushing the configuration of which prevents the operator from having access to the lamp caps, as well as to the electrical power supply pads, so that the operator can act in complete safety even if t4747 773

  the electrical current leads are under tension.

  A security socket according to the invention for a lamp

  tubular with axial caps is characterized in that it

  takes, in association with each base of the lamp, a

  puppy consisting of a first part and a second part

  electrically insulated telescopic rods

  by elastic means, and a base adapted to removably receive said cap, the latter being provided with a first contact element with the corresponding base of the lamp. while the base comprises a second contact element adapted, on the one hand, to be connected to a conductor

  and, on the other hand, to cooperate with the previous one.

  According to a particular arrangement, the second contact element is confined in a housing provided for this purpose inside the base being in the immediate vicinity of a mounting plate, and being set back from the

inner surface of the base.

  With such an arrangement, the caps of the lamp are

  in their entirety protected by the caps while allowing

  their electrical connection with the network, so that the operator is perfectly protected, even if the

  current leads, which are otherwise difficult to access.

  sibles, given their locations, are under-voltage.

  Such a socket, in addition to its simplicity of realization, therefore a low cost, therefore offers the guarantees

required security.

  Other features and advantages of the invention

  will emerge from the description which will follow

  FIG. 1 is an exploded perspective view of a safety socket according to the present invention, illustrating respectively the two parts of the cap, and the base; FIG. 2 is a longitudinal elevational view of a lamp each base of which is equipped with a safety socket.

  according to the invention, said bushings being shown in section;

  FIG. 3 is an elevational view of a tubular lamp

  Axial-shaped pellet, whose ends are each equipped with

ú474773

  a cap, the lamp thus equipped being shown before placement in the bases; FIG. 4 illustrates, in elevation, a phase of placing

  in place, or extraction, a lamp equipped with its capu-

  in the pedestals themselves fixed on any support, FIG. 5 is a sectional view on an enlarged scale of the zone surrounded in FIG. 4 and indicated by V; FIG. 6 is a view similar to FIG.

  variant of setting up or extracting an equi-

  its hoods in pedestals;

  Figure 7 is an enlarged view of the

  circled in Figure 6, and indicated by VII;

  FIG. 8 is a perspective view of the portion

  indicated by VIII in FIG. 5, showing in particular the axis

  of articulation of the cap on the base.

  According to the embodiment chosen and shown in the figures, in particular in FIG. 1, a bushing of

  according to the invention comprises a hood indicated overall

  balancing at 9 comprising a first portion 10 and a second portion

  of part 11, spaced by elastic means consisting of

  the occurrence by two springs 12, 13, concentric respectively

  contact and compression; the socket also includes

  a base 14 intended to be fixed to any desired support

represented in 15.

  Part 11 of the cap shows in the example of

  illustrated, nonlimiting, a globally tubular form

  quadrangular section with open ends,

  and it is adapted to be engaged in the part 10 of the capu-

  chon without significant play; the part 11 advantageously comprises

  on its inner faces longitudinal ribs 20 ser-

  to guide the base 21 of the lamp 22, it will be noted that this portion of the cap could be devoid of such ribs so that this portion 11, depending on whether it has ribs or not, can receive a lamp with

caps of different diameters.

  The ribs 20 extend locally inside the portion 11 having a truncated end 20A, destined

  forming a stop at the lamp 22.

  On the opposite side where the part 11 receives the lamp, this part 11 comprises on each of its faces a notch 25 intended to form clearances to allow the insertion of the spring inside said part 11, in such a way that end of the compression spring 13 builds

on funds 25A notches 25.

  On one side, the part 11 has a long opening

  tudinal 26 whose utility will appear later.

  As for the portion 10 of the cap, it is in the form of a tubular element closed at one end by a bottom 28, the other end being open to allow 1 '

Part 11 commitment.

  This portion 10 has a lower face 29, and an upper face 30; in the lower face is formed a hole 31, while the upper face has sides

  overflowing and gripping means 32 to be sail--

  lant compared to the base 14; it will be noted that the aforementioned gripping means is situated between two support planes 33, 34,

  (see also figure 8) whose utility will appear later.

  Substantially in the angle formed by the bottom 28 and the inner face

  29, a longitudinal slot 35 is provided to

  put the passage of a first contact element indicated

globally in 36.

  Such a first contact element is in the form of a blade having a plane section 36A extended by a

  heel 36B with 36C return; the plane section 36A being

  designed to be plated by the two aforementioned springs 12, 13, on

  the bottom 28 of the part 10, while the heel 36B is in conformity

  to protrude from the outer face of the

background 28.

  When Part 11 is engaged in Part 10, after

  implementation of the first contact element 36, and

  spells 12, 13, we assemble by a sliding assembly said

  parts; for this purpose, a hole 31 is

  vet 40 whose 40A rod is adapted to cooperate with the slot

  longitudinal 26 formed in part 11.

  This produces a cap assembly in which the two parts 10, 11 are telescopic and the

  different elements are captive, Part 11 being

  held at a distance from the part 10 by the compression spring

sion 13.

  The cap 9 thus formed is intended to be fitted on a base of a lamp, (part 11 of the cap) and in the base 14 (part 10 of the cap); this base comprises a base 50 with fixing holes 52 to a support, which

  base is bordered by vertically extending sides

  respectively lateral 53, 54, and bottom 55.

  In the angle formed by the base 50 and the bottom side having an outer boss 56, there is formed in the latter but inside the base a housing 57 adapted to receive a second contact element 58, while either side of this housing openings 59, 60, are provided

  to allow the passage of a driver.

  We will notice about the aforementioned housing that it allows

  the second contact element 58 to be recessed by

  to the bottom 55 of the base in such a way that it is not practical

not accessible.

  The second contact element 58 is also fixed in its housing by means of a screw 60 passing through a passage 61 formed in the boss 56 and screwed into an internal thread

  to this effect in said contact element 58, this screw ensures

  simultaneously connecting the conductor to said second contact element. We notice that the head of the screw 60 is

  clearly set back from the surface of the boss 56.

  The bottom side 55 has at its upper edge a central notch 65 on either side of which are

  formed of the ears respectively 66, 67.

  In FIG. 2, each base 21 of a lamp 22 is equipped with a cap 9, as described above, and the caps

  are each engaged in a base 14 fixed to a support some-

conch, such as a ruler 15.

  In this figure we see that each second contact element 58 is connected with a conductor 80 connected to a source of electrical power, and that the electrical connection

  between these second contact elements and the corresponding caps

  of the lamp is ensured through the first

  contact 36 and the preferential contact spring

  12 while the compression springs 13 maintain the lamp by pinching, because they are compressed during the insertion of

9 on the bases.

  In Figure 3, it is clearly seen that the

  22 whose caps are equipped with caps 9 has a length

  total length L significantly greater than the dimension

between the two bases 14.

  Note that such an arrangement allows not only to ensure the maintenance of the lamp 22 between the bases 14, but also to allow good contact between the first and

  second contact elements respectively 58 and 36.

  In addition, the parts of caps 10, 11, and the base 14 being made of insulating moldable material, the caps

  21 of the lamp are protected while at the same time

  transferable to the operator, since they are capped in

  their entirety by said caps.

  With regard to putting in place a lamp whose

  are equipped with hoods as above, two possibi-

  are offered to the operator.

  According to a first possibility, the lamp is engaged face-to-face between the bases, as illustrated in FIGS.

and 7.

  To do this, the operator exerts an axial pressure (arrows F) on each cap 9 so as to reduce, by

  compression of the spring 13, the length L to a length

  less than that between the bases, which has the simultaneous effect of bringing the free ends of the contact springs 12 on the end face of the caps 21; however, the lamp can easily be engaged between the pedestals

  until the lower faces 29 of the cap portions

  chons 10 arrive in abutment on the bases 50 of the bases 14.

  The pressure can be released if this has not been done during the insertion, the release of the pressure on the parts of the caps having the effect of releasing the compression springs 13 and thus to press the bottom 28

247477? 3

  parts 10 against the bottom walls 55 of the bases

  thus maintaining the lamp between the bases 14; quite at the end of insertion, the first and second contact elements are applied against each other by the action of the compression spring 13 thereby establishing the electrical connection. Note that as soon as the beginning of the insertion of the lamp between the bases, the operator no longer has any possibility of access to the elements that can be under voltage, as otherwise the caps of the lamp are protected in full, total security is achieved and the same goes for the same when the lamp has to be extracted from

  the fact that, contrary to the foregoing, the conne-

  electrical connection between caps and caps is interrupted

  from the beginning of the extraction of the lamp bases.

  According to another possibility illustrated in FIGS. 4 and 4, the lamp is tilted about a pivot axis (see also FIG. 8) formed by the cooperation of the bearing planes 33, 34 formed in the part 10 of the cap. , with the free edges of the ears 66, 67, formed in the base. For this purpose, (FIG. 5 in particular) the lamp is presented inclined with respect to the bases 14 and one of the caps is inserted in a base; then push (arrow Fl) on the free cap at the same time it is inserted into its corresponding base; it is noted that the contact elements respectively 36 of the cap thus inserted do not provide the electrical connection, as long as

  the caps are not brought into abutment in their base.

  According to this way of doing things, total security is also

  especially because the operator has no opportunity at any time to have access to

to be energized.

  Note (Figure 2 in particular) that a clearance J is formed between the bottom wall 28 of the portion 10 of the cap and the bottom side 55 of the base; such a game being obtained by

  the contact 36B heel 36B with the second element

  contact 59 so that it is ensured that a good

  electrical connection is established at the level of the contacts.

  It follows that the manipulations of a tube lamp

  axial-ended tube equipped with sockets according to the invention

  can be done without running any kind of dan-

  ger to the operator. Naturally, the invention is not limited to the embodiment chosen and shown, which is, on the contrary, capable of modification without departing from the scope

  of the invention, it is thus that the contact elements for

  They should have a different configuration and be arranged at another location, which will in any case be the furthest possible from the point of articulation, the first contact element 58 being advantageously recessed with respect to a housing which receives it. Similarly, it is conceivable that the cap and the base could have a section different from that shown, for example circular or otherwise, without the general provisions of the parts in question.

  cause are significantly altered.

Claims (14)

  1. Security socket for tubular lamp with axial caps, characterized in that it comprises, in association with each base of the lamp, a cap consisting of a first portion and a second portion telescopically mounted and to spacing by elastic means, as well as a base   adapted to removably receive said cap, this last   denier being provided with a first contact element with a base of the lamp, while the base comprises a second contact element adapted on the one hand, to cooperate with the previous one,   and, on the other hand, to be connected to a driver.   2. Security socket according to claim 1, characterized   ridiculous in that the first cap part is intended   to be inserted into a pedestal, and it is arranged to receive   see the first contact element in such a way that this   last has a section outside the said first   tie for cooperation with the second contact element, while the second portion of the cap is adapted to all the base of the lamp.   3 Security socket according to any one of   previous indications, characterized in that the two parts   the cap are assembled by means of a sliding   sea a definite stop of race in spacing.   4. Security socket according to claim 3, characterized   in that the aforementioned sliding assembly is constituted by a longitudinal slot formed in the second part of the cap, this light being able to cooperate with a stud   reported on the first part of the cap.   5. Security socket according to any one of the   previous indications, characterized in that the first   contact piece is constituted by a blade having a rectilinear section extending inside the first part of the cap and a heel forming the aforementioned external section,   and in combination with this lameun contact spring, pre-   fermentally frustoconical, the free end of which is   born to bear on the end face of a base of the lamp.   6. Security socket according to any one of the   preceding claims, characterized in that the means   elastic spacing of the first and second parts of   cap is a compression spring, concentric with   contact fate, one end of which bears on at least one shoulder arranged for this purpose in the second part, while the other end bears on a bottom wall of the first part.   7. Security socket according to claim 1, characterized   characterized in that the base comprises a housing in which is inserted a second contact element, this housing being provided in a vertical wall in the vicinity of a base of attachment of the base on a support, the housing being such that said second element of contact is slightly behind by   relative to the inner surface of this wall.   8. Security socket according to any one of the   previous indications, characterized in that the second element   contact is a stud fixed by screw in the housing pre-   quoted said screw jointly ensuring the connection of a driver.   9. Security socket according to claim 7, characterized   in that the vertical wall of the base forms a stop the first part of the hood.   10. The security pin according to claim 7, characterized   in that the upper free edge of the vertical wall   the base forms a pivot axis to the cap.   11. Security socket according to claim 10, characterized   characterized in that the aforementioned pivot axis is constituted by two edges located on either side of a notch, formed in the free end portion of the vertical wall, and on which are supported shoulders formed by   and other of a gripping means arranged at the end of a pa-   top king of the first part of the hood.   12. Security socket according to any one of the   previous indications, characterized in that the cap and   the base are made of moldable insulating material.   13. Security socket according to any one of the   previous indications, characterized in that the second part   The end of the cap comprises guide ribs for the base of the lamp, one end of the guide ribs being   further capable of constituting a stop at the corresponding end of the compression spring.   14. Security socket according to claim 7, characterized   characterized in that openings are provided on each side   other of the aforementioned housing for the passage of a driver.