Mechanisms for reducing risk of shock during installation of light tube

• US 8,894,430 B2
• Filed: 08/28/2013
• Issued: 11/25/2014
• Est. Priority Date: 10/29/2010
• Status: Active Grant

• Current Assignee: Ilumisys Incorporated (Altair Engineering Incorporated)
• Original Assignee: Ilumisys Incorporated (Altair Engineering Incorporated)
• Inventors: Simon, David, Ivey, John, Kosarek, Philip, Mackiewicz, Craig
• Primary Examiner(s): Gilman, Alexander
• Application Number:
  US14/012,047
• Publication Number:
  US 20140003054A1
• Time in Patent Office: 454 Days
• Field of Search: 439/226, 362/221, 362/650, 362/234, 315/121, 313/300, 200/341
• US Class Current: 439/226
• CPC Class Codes: F21K 9/272 Details of end parts, i.e. the parts that connect the light source to a fitting; Arrangement of components within end parts F21K9/278 takes precedence
• CPC Class Codes: F21K 9/278 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21V 25/04 breaking the electric circuit
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01R 33/96 with switch operated by engagement or disengagement of coupling
• CPC Class Codes: H05B 45/3578 Emulating the electrical or functional characteristics of discharge lamps
• CPC Class Codes: Y10T 29/49002 Electrical device making

Abstract

Disclosed herein is an LED-based light for replacing a fluorescent bulb in a conventional fluorescent light fixture. The LED-based light includes a housing having a first end opposing a second end, a circuit board disposed within the housing and extending along a longitudinal axis of the housing, at least one LED mounted to the circuit board, at least one end cap disposed on one of the first and second ends of the housing, the end cap including a switch and at least one electrically conductive pin configured for physical and electrical connection to the light fixture; and circuitry configured to provide a current path between the at least one LED and the at least one electrically conductive pin, wherein the switch is configured to selectively disconnect the current path.

Claims

1. An LED-based light for replacing a fluorescent bulb in a conventional fluorescent light fixture comprising:

at least one LED;

an elongate housing for the at least one LED;

an end cap disposed at a first end of the housing, the end cap including at least one electrically conductive pin configured for physical and electrical connection to the light fixture;

a pin cover extending from the end cap, the pin cover substantially enclosing the at least one pin in a protracted position, and supported for retraction into the end cap from the protracted position to at least partially expose the at least one pin;

circuitry configured to provide a current path between the at least one LED and the at least one electrically conductive pin; and

a system for retracting the pin cover from the protracted position and selectively disconnecting the current path, the system including a movable projection coupled to the pin cover, wherein manual movement of the projection actuates retraction of the pin cover from the protracted position and engages a switch to create an open circuit condition in the current path.

2. An LED-based light, comprising:

at least one LED;

an elongate housing for the at least one LED;

an end cap disposed at a first end of the housing, the end cap including at least one pin configured for connection to a fluorescent light fixture;

a pin cover, the pin cover substantially enclosing the at least one pin in a protracted position, and supported for retraction from the protracted position to at least partially expose the at least one pin; and

a system for retracting the pin cover from the protracted position, the system including a movable projection coupled to the pin cover, wherein manual movement of the projection actuates retraction of the pin cover from the protracted position.

3. The LED-based light of claim 2, wherein the projection is supported for slidable movement along an outer circumferential portion of the LED-based light.

4. The LED-based light of claim 2, wherein the projection is supported for movement in a direction of a longitudinal axis of the housing.

5. The LED-based light of claim 2, wherein the projection is defined by one of a slide lever or a button supported for slidable movement in a direction of a longitudinal axis of the housing within a groove defined along an outer circumferential portion of the LED-based light.

6. The LED-based light of claim 2, wherein the pin cover extends from the end cap in the protracted position, and is sized and supported for retraction into the end cap from the protracted position.

7. The LED-based light of claim 2, wherein the end cap includes a bi-pin configured for connection to a fluorescent light fixture, and the pin cover includes a pair of insulating sleeves concentric with the respective pins of the bi-pin.

8. The LED-based light of claim 2, wherein the pin cover is biased against retraction from the protracted position.

9. The LED-based light of claim 2, wherein the system for retracting the pin cover from the protracted position includes a locking mechanism configured to latch the pin cover in the protracted position and selectively unlatch the pin cover for retraction from the protracted position.

10. The LED-based light of claim 9, wherein manual movement of the projection actuates the locking mechanism to unlatch the pin cover for retraction from the protracted position.

11. The LED-based light of claim 9, wherein manual movement of the projection in a first direction actuates the locking mechanism to unlatch the pin cover for retraction from the protracted position, and wherein, with the projection moved in the first direction, manual movement of the projection in a second direction transverse to the first direction actuates retraction of the pin cover from the protracted position.

12. The LED-based light of claim 11, wherein the first direction is radially inward to a direction of a longitudinal axis of the housing.

13. An LED-based light, comprising:

at least one LED;

an elongate housing for the at least one LED;

an end cap disposed at a first end of the housing, the end cap including at least one pin configured for connection to a fluorescent light fixture; and

a pin cover extending from the end cap, the pin cover substantially enclosing the at least one pin in a protracted position, and supported for retraction into the end cap from the protracted position to at least partially expose the at least one pin.

14. The LED-based light of claim 13, wherein the pin cover extends from a base of the end cap in the protracted position and defines an outer surface sloping from the base towards a longitudinal axis of the housing.

15. The LED-based light of claim 14, wherein the pin cover is supported for retraction into the end cap from the protracted position in response to a force applied to the outer surface in a direction radially inward to a direction of the longitudinal axis of the housing.

16. The LED-based light of claim 14, wherein the pin cover includes a frustoconical body defining the outer surface.

17. The LED-based light of claim 13, wherein the end cap includes a bi-pin configured for connection to a fluorescent light fixture, and the pin cover includes a body substantially enclosing the bi-pin in the protracted position, with the body defining a pair of apertures for passing the respective pins of the bi-pin during retraction from the protracted position.

18. The LED-based light of claim 13, wherein the end cap includes a bi-pin configured for connection to a fluorescent light fixture, and the pin cover includes a pair of insulating sleeves concentric with the respective pins of the bi-pin.

19. The LED-based light of claim 13, wherein the pin cover is biased against retraction from the protracted position.