Light

• US 4,521,833 A
• Filed: 08/17/1984
• Issued: 06/04/1985
• Est. Priority Date: 08/20/1983
• Status: Expired due to Fees

• Current Assignee: Heinz Wolter
• Original Assignee: Heinz Wolter
• Inventors: Wolter, Heinz
• Primary Examiner(s): Lechert, Jr., Stephen J.
• Application Number:
  US06/642,001
• Time in Patent Office: 291 Days
• Field of Search: 362/116, 362/100, 362/189, 362/200, 362/205, 362/208, 362/295, 70/456 R
• US Class Current: 362/116
• CPC Class Codes: E05B 17/103 on keys E05B17/106 takes precedence; attached to key rings A44B15/005; on key bags or wallets A45C11/32
• CPC Class Codes: F21L 2/00 Systems of electric lighting devices systems employing both electric and non-electric light sources or exchangeable light sources F21L27/00
• CPC Class Codes: Y10T 70/8676 Key holders

Abstract

The invention concerns a light within whose handle-forming plastic housing (2) a button-cell battery (3) provided with a circumferential and a center surface pole can be brought into the switch-contact position against the force of a compression spring (6), a portion of the center surface pole (MP) of the button-cell battery coming into contact with a portion of a ring-shaped contact blade (9), the compression spring being arranged concentrically to the ring-shaped section (9'"'"') which rests on the housing bottom and the circumferential pole (UP) of the button-cell battery being in continuous contact (permanent contact) with a contact spring (16) which extends substantially tangentially to the button-cell battery, and it proposes, in order to obtain a shape which is simple to manufacture, compact and reliable in use, that the compression spring (6) lie free of contact in the opening (10) of the circular ring-shaped section (9'"'"') lying on the housing bottom (7) and, in the switch-contact position of the center surface pole (MP) of the button-cell battery (3) comes onto the ring-shaped section (9'"'"' ). This shape of light can be developed so compactly that it can be used as actuating handle for a key.

Claims

1. A light, within whose handle-forming plastic housing (2) a button-cell battery (3) provided with a circumferential and a center surface pole can be brought into the switch-contact position against the force of a compression spring (6), a portion of the center surface pole (MP) of the button-cell battery coming into contact with a portion of a ring-shaped contact blade (9), the compression spring being arranged concentrically to the ring-shaped section (9'"'"') which rests on the housing bottom (7) and the circumferential pole of the button-cell battery being in continuous contact (permanent contact) with a contact spring (16) which extends tangentially to the button-cell battery, the width of which spring corresponds at least to the stroke of the button-cell battery, characterized by the fact that the compression spring (6) lies, free of contact, in the opening (10) of the circular ring-shaped section (9'"'"') lying on the housing bottom (7) and in switch-contact position of the central-surface pole (MP) of the button-cell battery (3) comes onto the ring-shaped section (9'"'"').

2. A light according to claim 1, characterized by the fact that the contact spring (16) lies within a shaft (17) of the housing (2) and that its one end intersects on the periphery of the receiving space (18) for the incandescent bulb (19).

3. A light according to claim 1, characterized by the fact that the bottom-side end turn (6'"'"') of the compression spring (6) lies in a recess (8) in the housing bottom (7) the diameter of which recess is smaller than the diameter of the opening (10) of the ring-shaped section.

4. A light according to claim 2, characterized by the fact that the contact spring (16) extends at an acute angle (angle alpha) to the receiving space (18) which is aligned parallel to the key-shank insertion shaft.

5. A light according to claim 2, characterized by the fact that the contact spring (16) which is mounted only at its two narrow ends (16'"'"', 16") is recessed in slightly tilted position to the axis of displacement of the button-cell battery.

6. A light according to claim 1, characterized by the fact that the contact blade (9) rests, via a contact lug (22) which is bent off from the plane of the ring-shaped section (9'"'"') on the other side of the contact spring (16), against the bulb base (23) and the contact lug (22) thus formed is, in addition, urged into its position of application by an elastic body (24) supported on the housing side.

7. A light according to claim 6, characterized by the fact that the elastic body (24) is of cylindrical shape, extends within a shaft (25), and has a holding-down device (26) of the housing cover (4) arranged above it.

8. A light according to claim 1, characterized by the fact that the contact spring (16) which is in continuous contact with this circumferential surface pole (UP) rests with its free end resiliently against the base (23) of the bulb and is additionally urged into application there by a resilient or spring body (FIG. 20).

9. A light according to claims 1 and 3, characterized by the fact that the ring-shaped section (9'"'"') of the contact blade (9) is provided on its edge with a plurality of claws (9") arranged substantially at equal angular distance apart, which engage in hook-like manner in the cylindrical wall of the receiving chamber (5) for the button-cell battery (3).

10. A light according to claim 1, characterized by the fact that the engagement takes place in guide shafts (32) which extend in the direction of insertion.