LOCK INDICATOR

• US 3,824,819 A
• Filed: 04/16/1973
• Issued: 07/23/1974
• Est. Priority Date: 04/16/1973
• Status: Expired due to Term

• Current Assignee: Ralph E. Neary
• Original Assignee: Ralph E. Neary
• Inventors: Neary, Ralph E.
• Primary Examiner(s): Wolfe, Robert L.
• Application Number:
  US05/351,512
• Time in Patent Office: 463 Days
• Field of Search: 70/438,432,441,433,431,DIG.60
• US Class Current: 70/432
• CPC Class Codes: E05B 41/00 Locks with visible indication as to whether the lock is locked or unlocked indicator lights E05B17/10
• CPC Class Codes: Y10T 70/8027 Condition indicators
• CPC Class Codes: Y10T 70/8189 Contactual feeler

Abstract

A lock indicator has a lock body with a lock plug rotatable in the body about an axis. The lock plug has an inner end face and an outer end face as well as a bore extending through the plug between the end faces. A rod is slidable in the bore and has a follower end in abutment with a cam on the end of a driver bar rotatable about the axis and adapted to slide the rod against spring pressure to project the rod from the outer face of the body when the driver bar is rotated relative to the plug. The driver bar is usually rotated by a hand control on the interior side of the lock.

Claims

1. A lock indicator comprising a lock body, a lock plug rotatable in said body about an axis and having an inner end face and an outer end face, means defining a bore in said plug extending between said end faces, a rod slidable in said bore and having a follower end, a driver bar rotatable about said axis relative to said plug, and a cam on said driver bar in engagement with said follower end and adapted to slide said rod in said bore when said driver bar is rotated relative to said plug.

2. A device as in claim 1 in which said rod extends alongside of and parallel to said axis and said cam includes an axially undulatory surface spaced from said axis and in line with said follower end.

3. A device as in claim 1 including a spring urging said follower end of said rod toward said cam.

4. A device as in claim 3 in which said spring is disposed in said bore surrounding said rod.

5. A device as in claim 4 in which said bore includes a shoulder and said pin includes a shoulder and said spring bears against both of said shoulders.

6. A device as in claim 1 in which said plug has a counter bore in one end centered on said axis and intersecting said bore, and said cam is disposed in said counter bore.

7. A device as in claim 6 including a disc on said driver bar adjacent said cam, and a ring cap on said plug encircling said driver bar and abutting said disc.

8. A device as in claim 7 in which said ring cap and said plug have interengaging threads.

9. A device as in claim 1 in which said rod has an indicator end and sAid cam slides said rod from a position with said indicator end substantially flush with said outer end to a position with said indicator end projecting from said outer end.