EMC COLOSIO PDF

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Year of fee payment: Colosiio is provided a lamp holding device 1 comprising a supporting element 14 made of an electrically insulating material and having a housing space An electrically insulating hollow body 49 is disposed within the housing space 15 and is set to receive an end portion 3 of a lamp 2. Said hollow body 4 has a pair of electric contacts 7 each of which can be associated with a respective conductive element projecting from the end portion 3 of the lamp 2.

Each electric contact 7 comprises first and second resilient counter-elements 9, 10 which are both movable between an opened position to enable passage of the respective conductive element and a constraint position to lock the conductive element.

Each resilient counter-element has a contact surface 9 a10 a adapted to abut onto a respective side wall of the conductive element. The present invention relates to a lamp holding device. Lamp holders, generally made of an electrically insulating material, further allow assembling of same to bodies of lighting apparatus of different kinds constituting spotlights or floodlights, for example. In more detail, the present invention advantageously applies, as a lamp holding device, to the lamps of new conception identified by the abbreviation, which lamps have a rated voltage of V and an impulse voltage of V.

Extending from the opposite side of the bulb is an end portion from which two electric-connection elements project the shape of which is adapted to enable association with respective electric contacts.

In particular, the connection elements extend opposite each other and transversely to the longitudinal extension of the lamp. Generally, each connection element has a substantially parallelepiped conformation with a square cross-section, in which four faces are defined at least one of which is arranged to be associated with a respective electric contact of the lamp holding device.

It is known that lamp holding devices of the above mentioned type consist of a ceramic body of a substantially cylindrical conformation in which a bore for passage of the lamp is formed. In more detail, the bore has a substantially elongated shape in which two opposite ends are defined to enable passage of the electric contacts. In this manner when the lamp is inserted into the bore, the lamp is rotated around its longitudinal axis in such a manner that its end portions are disposed in correspondence with two electric contacts bayonet coupling.

Generally, the electric contacts consist of laminar portions made of a conductive material metal and are inserted into suitable spaces formed in the ceramic body on opposite sides of the passage bore for the lamp. Each electric contact is connected to a power cord by means of a suitable welding, and has a conveniently shaped flat surface to get in contact with a respective face of a connection element.

In this manner, when the lamp is inserted in the ceramic body, the lamp itself is rotated until respective faces of the two connection elements abut against the respective flat surfaces of the electric contacts. Also known are lamp-i holding devices in which the electric contacts consist of a resilient flat spring.

In this case, when the lamp is rotated about its longitudinal axis the connection element abuts against the spring which is maintained in a compressed state. Advantageously, by the resilient thrust of the flat spring, the electric contact is maintained steadily associated with the connection element to ensure a continuous electric connection. Known lamp holding devices further have suitable seats such arranged as to enable housing of fastening screws to associate the device itself with any frame, such as a structure of lighting apparatuses like spotlights or floodlights, for example.

The screws are fitted in respective through holes formed in the ceramic body and disposed on opposite sides of the lamp. To facilitate mounting operations of the device, the screws are inserted from the bulb portion of the lamp so as to arrange the respective head towards the outside of the ceramic body. The above described known art however has some important drawbacks.

First of all, it is to be pointed out that the above described lamp holding devices are not very reliable as regards the electric connection between the device contacts and the lamp connection elements.

In colosuo, due to possible movements of the holding device, the lamp may slightly rotate causing separation of the connection elements from the electric contacts. Also in the described solution in which the electric contacts emf of a flat spring, an unintentional slight movement of the cilosio can cause separation of the connection elements from the electric contacts, which will bring about lack of distribution of electric energy. Furthermore, a further drawback resides in that known devices enable insertion and energising also of lamps having operating features different from the provided ones.

In fact, due to the structure of the electric contacts, any connection element can get into engagement with the electric contacts irrespective of its shape. It is in fact to be noted that an electric connection is defined through coupling of a face of each connection element with a respective flat surface of the electric contact.

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Insertion of a non suitable lamp into the holding device gives rise to important drawbacks, such as smc of the lamp if it is overpowered because the operating features of the lamp are different from the expected ones. A further drawback relates to positioning of the seats for the hooking screws distributed in the ceramic body. In fact the ceramic body, generally made of steatite, is very fragile. This fragility is due not only to the material of which the body is made, such as said ceramic material, but also to the fact that the body itself has a very wide cavity and very thin walls in order to enable a bayonet coupling of colosi lamp.

Therefore, tightening of the screws could cause breaks and cracks in the ceramic body which will give rise to damage of the whole device. In addition, due the presence of a crack in the ceramic body no electric insulation exists between the energised parts and the screw. Under this situation, the screw head being is disposed externally and in sight could be dangerously energised. The technical task underlying the present invention is to devise a lamp holding device capable of substantially obviating the mentioned drawback.

Within the scope of this technical task it is an important aim of the invention to devise a lamp holding device, in particular for lamps identified by the abbreviation PGJ5 having a rated voltage of V and an impulse voltage of V, capable of ensuring a steady electric contact between the lamp and the electric contacts even in the event of slight movements of the whole device.

Another important aim of the invention is to devise a lamp holding device capable of enabling coupling exclusively with a single preestablished lamp type, i. In more detail, it is an aim of the present invention to make the holding device only adapted for coupling with lamps having given operating features.

Finally, it is a further aim of the present invention to make available a lamp holding device adapted for coupling with a respective frame without damaging the structure thereof. The technical task mentioned and the aims specified are substantially achieved by a lamp holding device of the type comprising the features described in the appended claims. Description of a preferred colosil not exclusive closio of a device in accordance with the invention is now given hereinafter and illustrated in the accompanying drawings, in which:.

With reference to the drawings, the lamp holding device in accordance with the invention has been generally denoted at 1. It is to be pointed out that the present invention has been conceived in relation to lamps 2 of a new conception with a connection or base identified by the abbreviation Emf having a rated voltage of V and an impulse voltage of V. For the sake of clarity during the present specification, identified by the term lamp is a lamp exclusively having the above mentioned features.

This lamp 2 consists of a light emitting bulb 2 a made of glass or other transparent material. The bulb 2 a colisio a substantially elongated conformation and extends along a respective longitudinal axis.

The lamp further has an end portion 3 of a substantially cylindrical conformation and extending from the opposite side of the bulb 2 a along said longitudinal axis. The end portion 3 has two conductive elements extending from respective opposite sides, along one identical direction transverse to the longitudinal extension of the end portion 3.

Advantageously, each conductive element has a parallelepiped conformation with a square cross section in which four side walls are defined. The holding device 1 comprises a hollow body 4 which is electrically insulated and is set to receive the end portion 3 of lamp 2. In detail, the hollow body 4 better shown in FIGS. The hollow body 4 further has a through slot 5 made in the middle of the hollow body 4 and set to receive the end portion 3 of lamp 2.

In more detail, the slot 5 consists of a central hole 5 a and two side portions 5 b disposed on opposite sides of the central hole 5 a and adapted to enable passage of the conductive elements of the end portion 3.

Two diametrically opposite apertures 6 are formed at the inner surface 4 b of the body 4each of said apertures being disposed in side by side relationship with a side portion 5 b of the slot 5 see in particular FIG. Each aperture 6 is suitably arranged and shaped for receiving an electric contact 7. In particular, each electric contact 7 is advantageously made of metal and can be associated with a respective conductive element projecting from the end portion 3 of the lamp 2 to connect the lamp 2 to suitable electric-energy transmitting means A shown in the accompanying drawings.

In more detail, shown in FIG. Alternatively, cables A can be disposed on opposite sides of the device, as shown in FIG. In particular, each electric contact 7 comprises a first and a second resilient counter-element 910 both movable between an opened position to enable passage of the respective conductive element and a constraint position to lock said conductive element.

Advantageously, each resilient counter-element 910 has a contact surface 9 a10 a susceptible of abutment against a respective side wall of the conductive element of the lamp 2.

Still more particularly, as shown in FIG. The first and second resilient counter-elements 910 consist of two portions projecting towards the centre of the hollow body 4which are of laminar conformation as well. In detail, each resilient counter-element 910 consists of a thin plate such bent as to define a slide surface 9 b10 b contiguous to the respective contact surface 9 a10 a.

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The slide surfaces 9 b10 b are set to abut against the conductive element during movement cklosio the respective resilient elements 910 from the constraint position to the opened position, to enable passage of the conductive element, as better clarified in the following. Advantageously, the first resilient counter-element 9 extends transversely of the second resilient counter-element 10so that the respective surfaces 9 a10 cllosio are disposed along respective planes perpendicular to each other.

In addition, each electric contact 7 further has an abutment element 11 facing the first resilient element 9 and having a respective surface 11 a. The abutment element 11 too has a laminar conformation and the respective surface 11 a is parallel to the contact surface 9 a of the first resilient element 9 and set to abut against a side wall of the conductive element of lamp 2.

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Under this situation, fmc first colosip counter-element 9second resilient counter-element 10 and abutment element 11 define a holding space 13 for the respective conductive element see in particular FIG. Advantageously, when the end portion 3 is inserted into the body 4the conductive element appears to be adjacent to the slide surface ekc b of the first resilient element 9 and out of the mentioned holding space Following a rotation of lamp 2 around its longitudinal axis, the conductive element is brought towards the first and second resilient elements 910 and abuts against the slide surfaces 9 colosoo10 a thereof.

Due to the thrust action of the conductive element on the first and second resilient elements 910said elements 910 take their respective opened position to enable passage towards the holding space The resilient element 10 pushes the conductive element in parallel to the central axis of lamp 2 and in the opposite direction to said coloio 2so that said lamp is maintained in contact with the upper surface 4 a of the lamp holder. In this manner the conductive element is located in the holding space 13 and three out of the four faces abut against the respective contact surfaces 9 a10 a and 11 a.

The device 1 further comprises a supporting element 14 made of an electrically insulating material, preferably plastic material, and having a respective housing space 15 within which the above mentioned hollow body 4 is housed. As better illustrated in FIG. Extending opposite to the inner surface 14 a is an outer surface 14 b set to abut against hooking means 16 described in more detail in the following.

Furthermore, the supporting element 14 has a passageway 15 a connecting space 15 with the outer surface 14 b. This passageway 15 a is placed at a central position and is adapted to enable passage of the electric cables A secured to contacts 7 for current distribution. As better shown in FIG. In cooosio manner the whole hollow body 4 that, as above said, is made of a ceramic material and therefore has features of great fragility, appears to folosio protected by the supporting element It is also to be pointed down that the hollow body 4 can be in engagement in a reversible manner with the supporting element 14 colosoo means of suitable connecting elements of known type and therefore not further described or illustrated in detail.

As above said, the device 1 further has hooking means 16 to secure the supporting element 14 to a frame, a ceiling light colosip any other support.

US20080132117A1 – Lamp Holding Device – Google Patents

As shown in detail in FIG. In particular, the junction element is made up of a holed disc having a substantially circular peripheral extension and in coaxial engagement with the outer surface 14 b of the supporting element The hooking means 16 is further provided with a pair of screws 17 housed within respective cavities 18 made in the junction element 17 b. Under this situation, the screws 17 have respective heads 17 a facing the outer surface 14 b of the supporting element Advantageously, the junction element 17 b has at least one projecting portion 8 facing the supporting element and adapted to be inserted into a suitable opening 19 formed in the outer surface 14 b see in particular FIG.

In particular, the junction element 17 b has two projecting portions 8each of which has a flat spring 8 a on top for engagement into a recess 8 b formed in the supporting element 14 at said opening In this way, as shown in FIG.

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Advantageously, screws 17 enable mounting emx the junction element 17 b to a respective frame or support denoted at B in FIGS. It is to be pointed out that advantageously the hooking means ecm can be associated with the device 1 also in the condition showing the hollow element 4 inserted into the housing space colosik of the supporting element Operation of the lamp holding device 1 in accordance with the invention described above mainly as regards structure, is as follows. Firstly, lamp 2 is associated with the hollow element 4.

In particular, the end portion 3 of lamp 2 is inserted into slot 5 as above described. Once insertion of the end portion 3 has been completed, the lamp 2 is rotated around its longitudinal axis.