Pivotable optical shutter for blocking emission from a lightguide adapter #5

• US 5,687,268 A
• Filed: 11/27/1995
• Issued: 11/11/1997
• Est. Priority Date: 11/27/1995
• Status: Expired due to Term

• Current Assignee: Furukawa Electric North America Incorporated (Furukawa Electric Company Limited)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Towhey, James Patrick, Stephenson, Daniel Lee
• Primary Examiner(s): Ullah, Akm E.
• Application Number:
  US08/563,067
• Time in Patent Office: 715 Days
• Field of Search: 385/19, 385/78, 385/147, 369/103, 369/97, 369/111, 369/218, 354/456, 354/288, 354/478, 354/485
• US Class Current: 385/73
• CPC Class Codes: G02B 2006/4297 having protection means, e.g. protecting humans against accidental exposure to harmful laser radiation
• CPC Class Codes: G02B 6/3825 with an intermediate part, e.g. adapter, receptacle, linking two plugs
• CPC Class Codes: G02B 6/3849 using mechanical protective elements, e.g. caps, hoods, sealing membranes G02B6/3816 takes precedence; provisionally see H01R13/44
• CPC Class Codes: G02B 6/3893 Push-pull type, e.g. snap-in, push-on

Abstract

An optical shutter for use with optical fiber connector coupling adapters has a front, transverse face which is sufficient to cover the opening in the adapter. The transverse portion has a pair of pivot arms extending from either side thereof which are adapted, at their distal ends, to be pivotally connected to the coupling adapter, thereby providing a pivotal mounting for the shutter. The transverse face also has a flange extending from one end thereof to permit actuation of the shutter, i.e. opening or closing, by means of the connector to be inserted in the adapter, or after removal of the adapter.

Claims

1. An optical shutter for use with one optical coupling adapter having an open end, said optical shutter comprising:

a light blocking transverse member having first and second sides;

a first pivot arm extending from said first side in a first direction at an angle to said transverse member, said pivot arm having a free distal end;

a second pivot arm extending from said second side in said first direction, said second pivot arm having a free distal end;

said first and second pivot arms being spaced apart a distance greater than the width of the coupling adapter;

means for pivotally mounting said distal ends of said first and second pivot arms to the sides of the coupling adapter with said pivot arms straddling the coupling adapter; and

means on said light blocking transverse member for actuating said shutter to block and to unblock the open end of the adapter.

2. An optical shutter as claimed in claim 1 wherein said transverse member has upper and lower sides and said means for actuating said shutter comprises a flange member positioned on said lower side and extending outwardly therefrom.

3. An optical shutter as claimed in claim 1 wherein said means for pivotally mounting said first and second pivot arms comprises a bore in the distal end of each of said pivot arms.

4. An optical shutter as claimed in claim 1 wherein said means for mounting said first and second pivot arms comprises an arcuate slot in each of said arms.

5. An optical shutter as claimed in claim 1 wherein each of said pivot arms has a substantially uniform thickness along its length and a tapered thickness portion adjacent the means for mounting.

6. An optical shutter as claimed in claim 1 wherein said shutter is made of a thermoplastic material.

7. An optical shutter as claimed in claim 6 wherein the thermoplastic material is PBT.

8. The combination of a coupling adapter and an optical shutter wherein said adapter comprises a tubular housing having a substantially rectangular cross-section with first and second side walls having exterior surfaces, said combination comprising:

a pivot pin extending outwardly from the exterior surface of each of said first and second side walls and having a distal end;

a shutter member for said open end, said shutter member comprising;

a transverse member having first and second sides and a transversely extending face;

a first pivot arm extending from said first side longitudinally in a direction substantially normal to said transversely extending face, said first pivot arm having a distal end;

a second pivot arm extending from said second side longitudinally and substantially parallel to said first pivot arm, said second pivot arm having a distal end;

each of said pivot arms having means for pivotally mounting of the distal end of said arm to one of said pivot pins; and

said arms being spaced apart a distance greater than the distance between said exterior surfaces of said first and second side walls and less than the distance between said distal ends of said pivot pins for straddling said tubular housing.

9. The combination as claimed in claim 8 wherein said means for pivotally mounting said arms comprises a bore adjacent the distal end of each of said pivot arms, each of said bores having a diameter greater than the diameter of the pivot pin on which it is mounted.

10. The combination as claimed in claim 8 wherein said means for pivotally mounted said arms comprises an arcuate slot in each of said arms, each of said slots having a width greater than the diameter of said pivot pin on which it is mounted.

11. The combination as claimed in claim 8 wherein each of said pivot arms is of substantially uniform thickness along its length and has a reduced thickness adjacent said means for pivotally mounted said arm to one of said pivot pins.

12. The combination as claimed in claim 8 wherein said transverse member has third and fourth sides, said third side having a shutter actuating member extending outwardly from said transversely extending face.

13. The combination as claimed in claim 12 wherein said shutter actuating member comprises a flange extending across the width of said third side.

14. The combination as claimed in claim 12 wherein said fourth side has a stop member extending outwardly therefrom.

15. The combination as claimed in claim 8 wherein said tubular housing is made of a relatively hard plastic material such as polysulfone.

16. The combination as claimed in claim 8 wherein said shutter member is made of a thermoplastic material.

17. The combination as claimed in claim 16 wherein said thermoplastic material is PBT.