AUTOMATIC POWER SHUT OFF FOR PAGER

Publishing Venue

Motorola

Related People

Abstract

As pagers get smaller, more and more factors work against long, economical battery operation. The fact that some of the new pagers tend to fall, in the user's mind, into the category of a pen or pencil makes them unlikely to think about turning the unit off when the day is through. When the pager is of a form factor that it will not stand unsupported in an upright position, this can be remedied as follows: Equip the pager with a miniature position sensitive switch (such as a mercury switch) mounted in the radio, such that when the radio is placed on a flat sur- face, contact is broken. The switch is placed in series between the battery and the radio circuitry ahead of the on-off switch, (if on-off is used).

0 M

MOTOROLA Technical Developments Volume 6 October 1986

AUTOMATIC POWER SHUT OFF FOR PAGER

by Mort Weinberg

   As pagers get smaller, more and more factors work against long, economical battery operation. The fact that some of the new pagers tend to fall, in the user's mind, into the category of a pen or pencil makes them unlikely to think about turning the unit off when the day is through. When the pager is of a form factor that it will not stand unsupported in an upright position, this can be remedied as follows:

Equip the pager with a miniature position sensitive switch (such as a mercury switch) mounted in the radio, such that when the radio is placed on a flat sur- face, contact is broken. The switch is placed in series between the battery and the radio circuitry ahead of the on-off switch, (if on-off is used).

Another application would be in parallel with the on-off switch such that either automatic on-off or a manual override to the on condition could be provided, allowing the pager to be on while lying on a flat surface.

0 Motorola, Inc. 1986

MO7VROLA Technical Developments Volume 6 October 1986

FIG,

PHYSICAL DESCRlPllON

RADIO PAGING bEVlCE~ iN THE IN-USE POSlTlON

POSITION SENSITIVE

SWITCH CONTACT

CLOSED

BLOCK DIAGRAM APPROACH 1

POSITION

SEt#;Fh

FIG. 3

ON-OFF CONTACT SWITCH

BAllERY OR )--

POWER - SOURCE

BLOCK DIAGRAM APPROACH 2

FIG. 3 ON-OFF SWITCH

BATTERY OR

POWER SOURCE

SWITCH CONTACT...