EP0077046A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Lightbulb socket
Assignee: LO Juntec HB
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Filing: 1982-10-08
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Granted: —
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Expires: 2002-10-08
Abstract
Abstract A lightbulb socket (1) includes first and second contact members (25, 26) for electric contact between two conductors (23, 23') and the central and side electrodes (10 and 11 respectively), and means (12) for receiving the base (9) of the bulb (8), said receiving means being by spring action held in a first position in relation to a shell of the socket when the bulb is unscrewed from the receiving means and being movable to a second position In relation to the shell against said spring action when the bulb is screwed into the receiving means, coupling elements (17, 17') arranged between the conductors and the contact members on one hand breaking the contact therebetween when the receiving means is held in said first position and on the other hand closing the circuit to the bulb when the receiving means is brought to said second position. The same member (17, 17') serving as a coupling element also serves as a spring for moving the receiving means (12) to said first position.
Inventors
- 👤 Lars Juntti
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 20:35
CPC Classifications
H; H01; H01R; H01R33/00; H01R33/965; H01R33/9651; H01R33/9653
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
179 words
Socket for lightbulbs, comprising first and second contact members(25,26) for electric contact between two electric conductors(23,23') connected to the bulb-socket and the central and side electrodes(10,11) respectively of the bulb(8), and means(12) for receiving the base(9) of the bulb, said receiving means being by spring action held in a first position in relation to a shell(2,3) of the socket when the bulb is unscrewed from the receiving means(12), and being movable to a second position in relation to the shell(2,3) against said said spring action when the bulb is screwed into the receiving means, coupling elements(17,17') disposed between the conductors(23,23'-) and said contact members(25,26) on one hand breaking the contact therebetween when the receiving means is held in said first position and on the other hand closing the electric circuit to the bulb when the receiving means is brought to said second position, characterized in that one and the same member(17,17') simultaneously serves partly as a coupling element between a conductor and a contact member and partly as a spring for moving the receiving means to said first position.
Claim 2
Dependent Claim
179 words
Socket for lightbulbs, comprising first and second contact members(25,26) for electric contact between two electric conductors(23,23') connected to the bulb-socket and the central and side electrodes(10,11) respectively of the bulb(8), and means(12) for receiving the base(9) of the bulb, said receiving means being by spring action held in a first position in relation to a shell(2,3) of the socket when the bulb is unscrewed from the receiving means(12), and being movable to a second position in relation to the shell(2,3) against said said spring action when the bulb is screwed into the receiving means, coupling elements(17,17') disposed between the conductors(23,23'-) and said contact members(25,26) on one hand breaking the contact therebetween when the receiving means is held in said first position and on the other hand closing the electric circuit to the bulb when the receiving means is brought to said second position, characterized in that one and the same member(17,17') simultaneously serves partly as a coupling element between a conductor and a contact member and partly as a spring for moving the receiving means to said first position.
Claim 3
Dependent Claim
126 words
Bulb socket according to claim 1, characterized in that the first or central contact member(25) is resiliently movable between a first position when the bulb(8) is removed from the receiving means (12) and a second position when the bulb is screwed into the receiving means, and includes an extension (25)',25") from the zone of contact with the central electrode (10) of the bulb to the zone of said second contact member (26) for bringing about electric contact between said two contact members when the bulb is unscrewed from the receiving means and thereby causing shortcircuiting of the current in case the coupling elements (17,17') would fail and not properly break the contact between the conductors (23,23') and the contact members (25,26) when the bulb is unscrewed.
Claim 4
Dependent Claim
167 words
Bulb socket according to claim 1 or 2, wherein the receiving means (12) and the two contact members (25,26) for the central and side electrodes (10,11) of the bulb base (9) are located above a partition (4) of insulating material included in the socket, said coupling elements (17,17') being located underneath said partition, characterized in that the combined coupling and spring element (17,17') consists of an electrically conductive, bent or curved spring leaf which at one point is attached to the underside of the partition (4) and which at a point spaced apart from the point of attachment is mechanically connected to a leg (14) of the receiving means (12) which passes through the partition, a connector element (24,24') belonging to the contact member (25,26) in question - which element also passes through the partition ( 4) -- being located above the spring leaf so as to contact the spring leaf (17,17') when this is straightened out by screwing the bulb (8) into the receiving means (12).
Claim 5
Dependent Claim
23 words
Bulb socket according to claim 3, characterized in that two identically shaped spring leaves (17,17') are provided for the two contact members (25,26).
Claim 6
Dependent Claim
54 words
Bulb socket according to claim 3 or 4, characterized in that the receiving means (12) consists of an internally threaded ring (13) from which project at least two legs (14) which extend through apertures (15) in the partition (4) and include means (19,20) for mechanically engaging the free ends of the spring leaves (17,17').
Claim 7
Dependent Claim
91 words
Bulb socket according to claim 5, characterized in that said means comprise not only a shoulder (19) which is located below the free end of the spring leaf and by means of which the spring-force is transmitted to said legs (14), but also a shoulder (20) which is located above the free end of the spring leaf and the purpose of which is to carry away an eventually stuck spring leaf upon moving an associated leg by the action of the spring-force from the spring leaf acting on the other leg.
Claim 8
Dependent Claim
52 words
Bulb socket according to anyone of claims 3 to 6, characterized in that the connector element (24) passing through the partition (4) serves not only as a connector between the coupling element (17,17') and the associated contact member (25,26), but also as means for attaching the contact member to the partition (4).
Claim 9
Dependent Claim
52 words
Bulb socket according to anyone of claims 2 to 7, characterized in that the extension (25') of the first contact member (25), provided for the purpose of shortcircuiting, extends directly from the zone of contact with the central electrode (10) of the bulb to the zone of the second contact member (26).
Claim 10
Dependent Claim
38 words
Bulb socket according to anyone of claims 3 to 8, characterized in that the partition(4) is part of a sleeve(3) enclosing the receiving means(12), said sleeve being stiffly connected to a closed base member(2) included in the socket.
References Cited (Backward Citations)
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