Battery missing indicator

• US 5,191,855 A
• Filed: 02/26/1990
• Issued: 03/09/1993
• Est. Priority Date: 02/26/1990
• Status: Expired due to Term

• Current Assignee: Pittway Corporation (Honeywell International Inc.)
• Original Assignee: Pittway Corporation (Honeywell International Inc.)
• Inventors: Conforti, Fred J.
• Primary Examiner(s): Cuchlinski, Jr., William A.
• Assistant Examiner(s): Beres, John L.
• Application Number:
  US07/485,221
• Time in Patent Office: 1,107 Days
• Field of Search: 116/200, 116/280, 206/333, 429/90, 429/96, 429/97, 429/98, 429/100, 361/343, 361/344, 340/568, 340/636, 340/628, 340/629, 340/630
• US Class Current: 116/280
• CPC Class Codes: G08B 17/00 Fire alarms; Alarms responsive to explosion
• CPC Class Codes: G08B 17/113 Constructional details
• CPC Class Codes: G08B 29/181 due to failing power supply

Abstract

A battery powered condition detecting unit includes first and second battery retaining prongs which in the absence of a battery come in contact with a blocking flange on a cover thereby making it impossible to latch the cover to the unit. In the presence of a battery, the free ends of the battery retaining prongs are spread apart so that the blocking flange drops therebetween allowing the cover to be latched to the unit.

Claims

1. An apparatus for inhibiting latching of a cover to a base of a battery powered unit in the absence of a battery comprising:

a base;

a cover;

first and second spaced apart, substantially identical, deflectable, non-latching, elongated battery retaining members biased toward one another and carried on one of said base or said cover, said members each having a free, battery retaining end wherein said ends are deflectable away from one another in response to the presence of the battery;

a blocking flange carried on the other of said base or said cover, wherein said flange engages at least one of said ends in the absence of the battery thereby inhibiting latching of said cover to said base; and

a latch mechanism carried at least in part on one of said base or cover displaced from said members.

2. An apparatus as in claim 1 wherein said blocking flange engages both of said ends.