DE1489382A1 - Lamp holder - Google Patents

Description

DIPL-ING. R. MERTEN5 - - - ■ _{Μ / ΏΤ}

PATENT LAWYERS Neue Mainzer Strasse 40-42 M / BI

HAITNLANWALIt telephone 283927, 28 8525

- L 84- P 3 -

Regards;

j Dr. ExpL

LINOLITE LIMITED
The Mill Works, Malmesbury,
WiIt shire / England

"Lamp holder"

The invention relates to lamp holders for electric fluorescent tubes with two ends.

Such lamp holders are usually made for a reason- body having two sockets, each of which encloses a contact for one of the tube ends; one socket is for the connection the neutral line (neutral conductor, earth conductor or central conductor) an electrical network determined and designed, while the other socket for the connection of the voltage leading Line is provided. For this purpose, a sliding shield is provided that surrounds and protects the sockets, when the fluorescent tube has been inserted. Although such ar-

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matureri are usually completely safe, the user can when changing a tube, give an electric shock «" if the lamp holder is still connected to the mains and the user in contact with the live contact.

In a lamp holder according to the invention that socket which surrounds the contact to be connected to the neutral line is connected in one piece with the base body or "permanently" attached to it and arranged so that this contact is completely surrounded and shielded, but with With the exception of an opening or recess which faces the other socket and through which the tube end can be pushed in order to come into contact with the contact, while the other socket has a movable shield or a movable end cover in which a switch element is located, which is in a "working position" when the shield is in its correct position and which is removed from the working position when the shield or cover is removed to enable insertion or removal of a lamp tube. When the switch element is in its "work" position, it is either in contact with a second element or contact to close a current circuit for contacting the tube, or it is _; Feo arranged that it can be touched by a second element or contact when this or this is moved in its working position, for example by a switching element which formed part of the Ketz switch for the holder

So if a pipe is to be replaced in this holder, the movable shield is separated from the voltage connected to the

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the standing heating conductor connected socket pushed away, so that any connection between the socket contact and the Conductor interrupted, so the socket is de-energized. The tube end can then be lifted out of the socket and then the other end can be grounded by movement in the longitudinal direction be pulled out of the opening or the recess in the wall of the socket surrounding the other contact. Since the other socket contact is connected to the neutral conductor ■, a user could not even then get electric shock if touched with fingers Fässimg komV and the contact touches. Then a new one inserted and the shield back in place whereby the. Connection between the network and the Fassuingskontakt is made.

The movable shield preferably also carries the contact for its socket, so that the socket, which is preferably made of plastic. is shaped, when the shielding is removed: has no metal parts in the contact area of the user. Reseating the shield has τ · Ad _"emnach; # two irj ^ nts., The contact is brought against the end of the tube and ■ the connection between the network and the -contact is prepared or es.wird again a contact part iii r, one, placed ^ in which. he is prepared for contact with a ·. <<. · other part of the current path to the mains conductor by actuating -Vie ^ nes. separate on / off switch or the like.: - τ: - -. ';: ·.' ■ ■■■ -. ■:; ■ -.,. ..... ■,..

The switch element carried by the movable shield is, in fact, a strip of electrically conductive material. who then _y, when the shield is in its correct position, stretches under the socket, around you

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second electrically conductive strip to touch the attached to the base body and designed for connection to the live conductor of the network.

The movable shield can conveniently carry a resilient latch with a surface protrusion on the body of the lamp holder engages so as to hold the shield in place around the socket.

A ^ embodiment of the lamp holder according to the invention is now described, for example, with reference to the drawing. It shows:

Fig. 1 is a longitudinal section in the center plane of the lamp. holder,

Fig. 2 shows a section in the plane II - H of Fig. 1,

FIG. 3 shows a section in the plane III - III of FIG. 1 with the movable shield in the normal position, (Operating position) and

Figure 4 is a plan looks _e · on the lamp holder with removed reflector and removed movable shield.

The lamp holder consists essentially of one in one Molded base body made of plastic. This body is labeled 2. -He wears a socket at each end The two ends of an elec-

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tric tube lamp 3 »which is indicated by dash-dotted lines.

The version shown in Fig. 1 4- is made in one piece with the base body 2 and shaped, in such a way that they of the main body is up. At its inner end face the socket 4- is provided with a contact 6, which is so that it is in contact with a solder bump 8 at the end of the lamp tube comes. The contact 6 extends under the socket and is attached to the base body by means of a screw 10; He is designed so that it is at the point 12 to the neutral line of the network can be connected.

The outer end of the socket has a circular opening 14, into which the tube can be pushed and which the single access to contact 6, so that the contact then, when the tube is in its position of use, is completely shielded, and that when the tube is removed only access to this contact is through the opening 14-. Plastic ribs 16 extend from both the upper frame wall downwards as well as from the lower wall upwards; they are intended to insert and center the lamp tube in the Ease the setting.

The socket at the other end of the body consists of one molded carrier or support 20 made of plastic on which the other end of the tube rests, and made up of two clasps or brackets 22, also made of plastic, which surround the tube end so that it is held in the correct position in the frame. The socket has so far no metal parts that can be used by a user could be touched.

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H89382

For the socket 20 is a shield or an end cover 24 provided. The shield 24 is on the base body held under corresponding shoulders 26 as a result of the engagement of a shoulder (not shown). Shoulders are molded in one piece with the base body. The arrangement 'is made so that the shield to the outside of the socket can be pushed away and removed from the body to expose the socket, so that a lamp tube in the Socket can be inserted or removed from it.

When the shield is in the correct position (operating or use position), it completely surrounds the socket and consequently also the end of the tube. The shield is provided with a contact for the socket in the form of a strip 30 which is arranged so that it can contact a solder bump 32 at the end of the lamp tube _e the contact 30 extends below the holder and the outer end 34 · forms a circuit he element, which is in a working position above a second switching element 36 at the end of a conductor strip 38th The strip 38 is connected to the base body at 40 and is designed for connection to the live conductor of the network at 42.

The switch element 36 is in its rest position in the drawing (out of order) shown. It is in the operating position (working position) against the spring tension of the strip moved by means of a square cam member 44 which is rotated by means of a pull cord 46 and part of the power switch of the lamp holder

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Each time the cord 46 is pulled, the cam member 44 is rotated 45 ° and held in the new position after the cord is released by a ratchet device shown generally at * ~ D (FIG. 4). The first pull on the cord from the position shown places the switch in the "on" position with the edge of the cam member lifting the strip 38 so that the element 36 contacts the element 34. In this position the current path to the tube is closed.

When the cord is pulled again, the contact strip lowers 38 in its "off" position and the current path is interrupted.

When the shield 24 is pushed away from the fit, the element 34 is brought out of its operative position, in der.es ..? xLas element 36 touches when the power switch is on "A" .. stands, .or it is in a position in which it is through; the element 36 can be touched when the main switch or power switch is off so that the Contact. 30 is not energized. Ba yourself the element 34 is unfolded to the base of the socket, it is not accessible and cannot be accidentally touched.

When the shielding is pushed back on again, the element 34 brought back into its working position and the tube can be switched on and off at the main switch using the pull cord turned off. .

The shield or end cap 24 is shown in its Position in which the contact touches the tube end and the switch

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terelements 34 and 36 are engaged by means of a pawl held in the form of two spring levers 52, one on each side, having. The ends of the spring levers are shaped so that. they over one of the mount element 20 extending downward Projection 54 slide (ride) and then through this Lead are kept. (see Fig. 1). Since the electric lamp tube is only removed from the neutral socket by longitudinal movement can be, it must first always be lifted out of the other version for the purpose of removal. And this can only happen if the cap (shield) 24 has been removed beforehand the switch 34- »36 is always open when the lamp is straight is removed from the holder or inserted into it. So the arrangement is perfectly safe.

If so desired, a second switch device can also be used be provided in such a way that when the shield 24 is removed, only the live socket is switched off, but also the connection between the network and the neutral contact 6 is interrupted.

The arrangement shown is with a socket 56 for a electric shaver (shaving socket) and provided with an insulated reflector 58. The reflector 58 is on the base body fastened by a screw 60 and at the same time acts as a shield the contact strips 6 and 36.

It should be emphasized that the main switch for the tube has been omitted or at any other location in the holder. In such an arrangement, the switch

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H o CJ ο ο ζ.

element 36 permanently in a position for contact with the movable Element 34- whenever the latter is in its working position is located.

Patent claims:

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Claims (6)

Pat en tan sayings Λ}) lamp holder for electric tube lamps with two ends, consisting of e: <nem base body and ge a socket surrounding the connection contact for the two tube ends, characterized in that the socket which receives the contact to be connected to the neutral conductor is integral with the Base body is molded or permanently attached to it and is arranged so that the contact is completely surrounded and shielded with the exception of the leaving of an opening or recess which faces the other socket and through which the tube end passes for the purpose of contacting the contact, and that the The other version has a movable shield or a movable end cover which contains a switch element which is in a working position (in the sense of the above description) when the shield is in its normal position and which is removed from this working position when the shield or the cover is removed to a take out or a put a lamp tube to make β possible 2) lamp holder according to claim 1, characterized that it has an externally operable switch, and that a second switch element in and can be moved except for a position in which it touches the switch element carried by the movable shield 909812 / 08U2 can ren when the shield is in its intended position on the holder. 3) lamp holder according to claim 1, characterized g e - k e η η ζ calibrates that the switch element in its working position is always arranged so that it touches a fixed contact that is attached to the under the voltage-carrying mains conductor located near the socket can be connected. 4) lamp holder according to claims 1-3 * thereby characterized in that the movable shield carries the contact for her composure. 5) lamp holder according to 'claims 1-4, d a d u r c h g e k e indicates that he has a spring latch having the movable shield in place on "your holder holds against the tension of a spring. 6) lamp holder according to claim 5, cL a d u r c h g e k e nnz e i 'c'h h et that the movable shield a ■ Kiinkengli'ed made of resilient material, and that the body of the holder is formed with a protrusion which is in engagement with the latch member when the shield is in place. - 909812/0802