DE2031212A1 - Device for controlling the charging process of a buffer battery - Google Patents

Description

SODE C O, Sociote des Compteurs, 1211 G en e ν e

deGeneve

Device for controlling the charging process of a buffer battery

The present invention relates to a device for controlling the charging process of the backup battery a subscriber station in telephone systems.

Telephone exchanges are known whose subscriber intercom stations do not require any additional energy sources, since the operation of their individual operating organs | can be covered by the loop current of the telephone system. In contrast, there are telephone exchanges whose subscriber stations, such as coin-operated stations and the like, briefly require amounts of energy to operate their electrical organs that cannot be covered by the loop of the telephone system. Such stations are provided with backup batteries, which have to be sufficiently charged via the subscriber line from the control center during breaks in the conversation to be able to

301 SODECO ./.

109847/1016

2031

to ensure proper operation of these stations ,, It but difficulties arise ^ when on a telephone = central subscriber stations of the first-mentioned type provided with additional energy sources can be connected should. To make this possible, it is necessary * kost = Carry out playful changes and adaptations in the headquarters.

The present invention is based on the object of creating a device of the type mentioned first in the telephone exchanges in a simple manner, which controls the charging process of the backup battery required to feed the operating organs of the subscriber's speeches without additional information from the central office ₉ whereby no changes need to be made in the control center itself ο

The task is solved according to the invention in that the device can be connected to the subscriber line as an independent unit and has a detector for also coming from the TeilsaeSjjnerleitung © control signals gw®Icfe®r eeiaersaits © in contact pair «ines U» eohfclt®r® swacksi To » im & ibsoMit? Mg I $ f Tail = user line from © iner ~ in the ¥ @ rnäprQ®hz®ntrs, l® controls the existing direct current source»

301 30DBC0 '109847/1016

An embodiment of the invention is based on the Drawing, the figure of which represents a schematic circuit diagram, explained in more detail.

According to the drawing, there is a control device the charging process of a backup battery from a detector 1 of the control signals of the subscriber line a, b. The detector 1 is designed in a known manner and controls a Relay, whose contact pair 3 is a backup battery 4 of the subscriber station 2 for the duration of the rest breaks between calls, including calls over subscriber line a, b, to the DC power source in the control center 9 switches. The subscriber microphone unit has the usual design in addition to the buffer battery also one via the fork contact HU of a handset 5 and a capacitor J5 to the two subscriber line wires a, b switched bell 7 and other components, such as taxi pulse counter, microphone feed circuit with back loss, which are denoted by 8.

The device for controlling the charging process of the buffer battery 4 is designed as an independent unit and can also be connected to the subscriber line a, b, in the main distributor of the control center 9. Included do not have to enable the buffer battery 4 to be charged Changes can be made in the control center 9.

301 soDsoo 109847/1015 ./.

The detector 1 for the control signals} which is used to switch the backup battery on and off. 4 from the direct current source of the control center 9, receives these signals exclusively from the subscriber line a »b when lifting the handset 5? when calling another person or when weighing the handset 5 after the end of a conversation »The signaling of the state of the subscriber station 2 to the detector 1 to carry out the switching process can be carried out with the help of the stabilized charging current of the buffer battery 4, which is always smaller than the lowest Current of the telephone system, whereby its size can serve as a criterion for the initiation of the charging process. If the current flowing through the loop drops to the level of the charging current, the contact pair 3 of the relay in the detector 1 is switched to charge and the buffer battery 4 is charged. If the current in the loop rises above the level of the charging current when lifting the handset 5 or when making a call, the detector 1 switches off the subscriber line a ₅ b from the direct current source 10 of the control center 9 »

The state of the subscriber station 2 can also be transmitted to the detector by audio frequency signals from the subscriber station 2 or be signaled by time-coded direct current pulses of the charging current.

301 SODECO 109847/1015

The device described does not need any additional information from the control center 9 to function properly ; the information from the subscriber line a, b is sufficient for this. It is simple and can be switched on as an independent unit in the main distributor of the center 9, with no changes in this regard in the center 9 being necessary.

30, SODEOO, 09847 / 101.8

Claims (6)

SODECOo Societe des Compteurs de & en! V © PATENT CLAIMS 1. Device for controlling the charging processa of the buffer battery a subscriber station in telephone systems, characterized in that they are an independent unit can be connected to the subscriber line (a, b) and one Detector (1) exclusively from the subscriber line (a, b) originating control signals, v / which in turn a contact pair (3) of a switch for the purpose of on = and Disconnection of the subscriber line (a, b) from one in the Telephone exchange (9) controls existing direct current source (10). 2. Device according to claim 1 ,. characterized in that they let to scarf TBAR in the main distribution frame of the telephone exchange (9). 3. Device according to claims 1 and 2 _S characterized in that the control signals originating from the subscriber line Ca ₉ bj are formed by dea sfabilSsiertiSE Lsdeetroa i © s buffer circles ₈ where deeoea dröee © as a criterion for the dl® initiation d «ü ladevorgsnges 301 SOBEOO, 09847/1015 4. Device according to claims 1 and 2, characterized in that from the subscriber line (a, b) originating Control signals are audio frequency signals. 5. Device according to claims 1 and 2, characterized in that that the control signals coming from the subscriber line (a, b) are time-coded direct current pulses of the buffer circuit. 6. Device according to claims 1 and 2, characterized in that the control signals originating from the subscriber line (a, b) are call signals. Dr.SZ/mv 30, SOBEOO 109847/1015 Blank page