Browse Prior Art Database

COMBINATION BACK-UP BATTERY AND NEGATIVE BATTERY CONTACT

IP.com Disclosure Number: IPCOM000006635D
Original Publication Date: 1992-Aug-01
Included in the Prior Art Database: 2002-Jan-17
Document File: 1 page(s) / 60K

Publishing Venue

Motorola

Related People

Dwight Brooks: AUTHOR [+3]

Abstract

Many factors must be considered in the design of pagers today. Four of the most critical are low cost, small size, robotic assembly, and reliability. Most designs strive to reduce piece parts, eliminate special handling in the factory and make replacement in the field easy as part of their goals up front in a program.

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MOTOROLA INC. Technical Developments Volume 16 August 1992

COMBINATION BACK-UP BATTERY AND NEGATIVE BATTERY CONTACT

by Dwight Brooks, Stefan Penna and Gus Suarez

  Many factors must be considered in the design of pagers today. Four of the most critical are low cost, small size, robotic assembly, and reliability. Most designs strive to reduce piece parts, eliminate special handling in the factory and make replacement in the field easy as part of their goals up front in a program.

  This proposed solution is cost effective because it is composed of only one stamped and formed member that upon processing achieves four separate functions namely; negative primary cell contact, negative back-up cell contact, positive back-up cell contact as well as act- ing as a carrier for the back-up cell (see Figs. 1 and 2). The process of this part in the factory has a better yield than the conventional design due to the fact that it is reflowable and does not require post reflow soldering (This saves on cycle time, factory space, equipment cost

and maintenance), also the part is reflowable without the necessity of a separate carrier due to fact that the large base is very stable. The contact is split during the same operation that separates the PCB from the array again eliminating the need for an extra piece of equip- ment. The cell cost is lower since no secondary lead attachment is required. Finally, the cell is easily replaced in the field without the need of soldering (which i...