Патент USA US2136639код для вставки
Nov. 15, 1938. K. PQSCHWEIMER ‘ 2,136,639 CIRCUIT ARRANGEMENT FOR CARRIER CURRENT TELEPHONE SUPPLY SOURCES Filed Nov. 9, 1956 2 Sheets-Sheet l INVENTOR ' Kuiséw SCHWEIMER BY 9 ' v _ , 4,0144 ATTORNEY NOV. 15, 1938. K_ p_ SCHWEIMER R ‘2,136,639 CIRCUIT ARRANGEMENT FOR CARRIER CURRENT TELEPHONE SUPPLY SOURCES Filed Nov. 9’, 1936 2 Sheets-Sheet 2 3 N ' _ ' I I i _- -_- -_- _- ' 3% i/PéL/Wi 5/ S2 $3 $4 _% "L; . ‘L__ ILF. m RAD/0 APPARATUS "- 5 : i pw i] 'pw RELAY 2 C £E~w :' ‘ z 1 < z 7. ‘G IFVE E- I RELAY VNV PG W 220 VOLT . A 6 LINE INVEN TOR. KLAl/S PETER SCHWEIMER BY ATTORNEY. 2,136,639 Patented Nov. 15, 1938 UNITED STATES PATENT OFFICE 2,136,639 CIRCUIT ARRANGEMENT FOR CARRIER CURRENT TELEPHONE SUPPLY SOURCES Klaus Peter Schweimer, Berlin-Grunewald, Ger many, assignor to Allgemeine Elektricitats Gesellschaft, Berlin, Germany, a corporation of Germany Application November 9, 1936, Serial No. 109,872 In Germany November 25, 1935 7 Claims. This invention relates to an improved carrier current telephone supply source. The object of this invention is to provide an emergency, auxiliary source for wired radio ap 5 paratus which is particularly intended for the supply of carrier-current telephony along power lines. The invention essentially consists of a pilot relay designed to test the level of the line potential at certain intervals, which is re-con H O nected under the same magnetic condition with the power system in which the relay operates in the presence of normal voltage on the line. Addi tional supervisory relays are provided for the purpose of checking up on the voltage condition 15 of the station storage battery acting as an aux iliary or emergency source, and of the converter or inverted recti?er. It is known from the prior art to operate high frequency telephony equipment from the mains, that is to say, all of the currents required for the feed of the tubes and the relays are taken from the alternating current line; it is also. known in the art to provide auxiliary or emergency sources of supply so that such auxiliary source 25 of current is automatically connected whenever the line voltage happens to fall below a de?nite pre-arranged level. However, certain dif?culties arise in the operation of these schemes in prac tice. Some of the trouble consists in that a state 30 of potential is liable to arise in which the auto matic switching relay just happens to be ener gized by a potential being at one time slightly above, and at another time somewhat below the level where the change~over occurs, with the re 35 sult that the relay is caused to operate all the released, the said relay, by way of a change-over contact, is immediately thereafter connected again with a source of potential and maintained in energized condition so that, when the clock work reconnects the supervisory relay with the line voltage, this operation is brought about in the presence of energization. In other words, in each supervisory action the relay is called upon to merely ascertain whether by chance the volt age has fallen below the limit and level which it requires to keep its keeper or armature inva state of attraction. One exempli?ed embodiment of the invention is illustrated by way of example in. Fig. 1 of the 15 annexed drawings schematically and Fig. 2 shows a diagram of the time delay and auxiliary relay portion of the invention. Fig. 3 shows a com— plete circuit diagram with the relays and their 20 corresponding contacts in line. Referring to the drawings, HF is the radio frequency appaartus, say, a radio frequency transmitter and receiver equipment for a radio frequency telephony along lines (wired radio) more particularly over power lines, remote-con circuits. In lieu of the radio frequency appara tus there could be connected also some other current-consuming device which is to be supplied with voltage under conditions as permanently as possible, with this condition that for service rea sons the potential so supplied should never fall below the normal feeding level. The radio fre quency apparatus HF is united with the supply line by way of the relay contacts 53 and .94, for ‘ example, a supply line working with alternating tear of the relay contacts, but also unfavorable action upon the auxiliary source of supply, the installation to be so fed, and the switching means used therefor. Now, according to the invention the said draw~ backs are avoided by that, after the change-over relay has been caused to respond, preferably after the release of the relay energized from the line voltage, the high-frequency communication ap~ paratus or other mains-supplied apparatus is fed current of 220 v. It will be understood that the arranged adjustable interval of time. Arrange ments with this end in view are preferably so 50 made that, after the release of the relay with supervisory action, the auxiliary source of supply is connected only when the source of direct cur rent to energize the same, such as the station or storage battery, is ready for operation and serv 25 trol, tele-mechanical, telemeter'ing and similar time. This not only means very rapid wear and from the auxiliary source of supply for a pre 60 (Cl. 171-97) supervising the line voltage has been actually type of construction of the radio frequency equip ment is immaterial in the present connection; for this reason such details as the lines serving for signal transmission and communication etc. have been omitted in the drawings. Also connected with the alternating current line N is a trans former T in whose secondary circuit is connected in series with a relay Pw by way of the “back” contact of a change-over contact a2, a recti?er G or a rectifier circuit arrangement, and a resist ance W. E denotes an emergency or auxiliary source of supply, such as a storage battery mount ed in a power station wherein the equipment for wired radio is installed. The voltage of the said storage battery E is supervised by the aid of a distinct relay Pg. GW indicates a motor gen erator, an inverted converter or recti?er. The ice. Moreover, it is preferable to cause connec~ tion of the auxiliary source of supply as a func tion of the response of the voltage supervisory relay only when a distinct relay serving to super vise the voltage of the auxiliary source of supply voltage of this converter device is checked up by 55 the agency of a separate relay S. In Fig. 2 relays U, V denote auxiliary relays, Zt is a clockwork, and M shown in Fig. l is a tripping relay. has also been caused to respond, After the relay arrangement is as follows: Now, the operation of the above-mentioned 60 2 2,136,639 Suppose the voltage of the alternating current supply line N drops a certain amount su?icient to cause the direct current relay Pw included in the tion battery, whenever the voltage of the latter has dropped below a pro-arranged level. The bell L could also be directly operated from a contact secondary circuit of the transformer T to be re leased. The consequence is that the relay Pw of relay Pg so that the response thereof would be independent of the release of relay Pw. What is claimed is: closes its back contact pw. If the voltage of the storage battery has been adequately high, the relay Pg has responded and keeps also its contact pg closed. The converter GW, as a result, is start ed and generates an alternating current voltage. A short while after connection of the converter GW the relay S connected in parallel thereto will be caused to respond and operate, closing its con tacts sl, s2 and s5 and changing over its make 15 and-break contacts 33 and $4 to make connection to converter GW. The radio frequency apparatus HF will then be fed from the station battery by way of the converter GW and the contacts 83 and 34. At the contact s2 is made a response circuit for the relay U so that when the relay Zt has not yet responded, and relay M at contact vi and contact pm is disconnected from the supply cur rent source. Relay U responds, makes its contact ul , with the result that relay V is caused to oper 25 ate, the latter, in turn, closing its contact 212. At the contact 1.52, the relay Pw supervising the line voltage has been connected to the works poten tial, with the result that the same has a chance to become re-energized. But previously by way 30 of the contact 35, contact 712, contact m, the back contact 3320 had been bridged, with the result that also the shifting over of the contact M and the renewed responding of the relay Pw occa sioned thereby will be unable to lead to the dis 35 connection of the converter GW. After a certain interval of time the response time-lag relay Zt, after expiration of lag of a mechanical or thermal time measuring means op tionally attached thereto, is caused to respond and to break at its contacts at the response cir cuit for relay U. As a result, the said relay U is caused to open its contact ul and it connects at its contact 2L2, while in back position, the ener gized relay Pro with the transformer T and thus the power line N. During the brief length of time it takes contact u to shift, the ?eld in the relay Pw is maintained, so that the relay is again merely called upon to determine whether the power line will furnish sufficient potential in 50 order that it may keep connected therewith. After the relay U, by opening of contact at has been released again and as a result also the relay V, and after relay Pw has been caused to respond again, relay M is caused to respond, that is, from minus by way of contacts pw, 1L3 and contact 21! to plus. Relay M is provided with a slight time lag response; it responds after a certain while, and it breaks at its contacts m the holding circuit for the relay S and the circuit of the converter 60 GW so that the latter is disconnected again. If, however, after the relay Pw had been re connected with the power line, it was released again, the consequence would have been that the converter GW would not have been disconnected 65 because in this instance relay M would have been unable to fully respond, so that the feed circuit for the converter GW would have been preserved. A state of non-operativeness of the storage or station supply source E is brought preferably to 70 the attention of the supervising personnel in the station by that some alarm device such as a bell L which is actuated by the aid of the contact pg serving as a voltage supervisor relay for the sta 1. A circuit arrangement of auxiliary supply sources for wired radio apparatus normally con nected to a main supply line, comprising an aux iliary source of voltage, a main line relay which 10 serves to supervise and test the line voltage, means for causing said main line relay to respond when the line voltage has dropped below, or has exceeded, a certain level, said means comprising a time delay mechanism cooperating with a plu 15 rality of contacts to repeat the test at de?nite time intervals, and provides re-connection to the supply-line voltage which will be effected only when the voltage-supervisory relay has stayed a certain length of time in a state corresponding to the normal main line voltage. 2. An arrangement according to claim 1, with this characteristic feature that the relay super vising the line potential is always re-connected to the power line when the relay windings are in a magnetic condition which corresponds to the nor 25 mal state of line voltage. 3. An arrangement according to claim 1, with this characteristic feature that the relay super vising the power line potential, after it has been 30 caused to release, is connected with an auxiliary voltage, and that it is re-connected with the power line in attracted state. 4. An arrangement according to claim 1, with this characteristic feature that the auxiliary source of current is subjected to supervisory ac tion from a distinct relay, a current converter device being connected so as to be made a func tion of the said relay, after release of the relay supervising the power-line potential. 5. An arrangement according to claim 1, with this characteristic feature that the voltage state of the converter, is supervised by a further relay, and that the emergency source of current is con nected With the apparatus to be fed only when the converter has reached the proper operating state. 6. A circuit arrangement for auxiliary supply source of apparatus normally connected to a main line' supply source, comprising a main line relay coupled to said main line supply source, an aux 50 iliary battery supply source, a second relay con nected to said auxiliary supply source and said main line relay, a time delay relay cooperating with a plurality of contacts to provide a recon nection to said main line supplyv after said aux iliary supply has been connected to said appara tus for a predetermined time providing said main supply has again obtained its normal line voltage. 7. A. circuit arrangement for auxiliary supply source of apparatus normally connected to a 60 main line supply source, comprising a main line relay coupled to said main line supply source, an auxiliary battery supply source, a recti?er, a sec ond relay connected to said auxiliary supply soiu‘ce, said recti?er and said main line relay, a time delay relay cooperating with a plurality of contacts to provide a reconnection to said main line supply after said auxiliary supply has been connected to said apparatus for a predetermined time providing said main supply has again ob 70 tained its normal line voltage. KLAUS PETER SCHWEIMER.