US2098547A - Time controlled system - Google Patents

Description

Nov. 9, 1937. E. B. JACKSON TIME CONTROLLED SYSTEM Filed Oct. 15, 1934 .lllllllllR l I l II Patented Nov. 9, 1937 UNITED I STATES PATENT v OFFICE TIME oou'momzsn SYSTEM Application @ctcher 15 1934, Serial No 348,314

'"wention relates in general to time s s and more particularl to syslurality of secondary apparaand controlled by a and in' which each secondary odic'ally corrected. and s inchro aster clock.

' of the invention is to cove type which is e2 e and which requires 0 toses are e or master a oataws "crevice k n each secondaz;

o open the to the secondary mined chronological re oi the invention relau 1e above device is current is main g the synchroz" rative such secondary stopped in the ore o a d other objects am. specificaliy mentioned move rstood from a perusal of :1 when read in connect;

lo the accoz of the invention; and emetic diagram showing a medi .e invention.

o the drawing in detail, the master hown in Fig. 1 comprises an" usual nute impulse contact device *3 for suitahie sending out the usual minute impulses to the secondary; usual or suitable corrective rapid impulse contact device 2 for periodically sending out a series of rapid impulses to the secondary apparatus, (for example, one every two seconds over a period of thirty seconds) a contact device 3 controlled by master apparatus time for periodically cutting in ancient the rapid impuise con tact device 2 (for example, from fifty-nine minutes and fifteen seconds to fiftg nine minutes and forty-five seconds) a reiay t to controlling all of the impulses se t out by the master apparaa resistance 5 f enabling a con lnuous weak eurcent to he ed periodical y to Zine the aster app etoe to the secondary ap master J- -e mm a contacts 2 the conductor t8, the weak coherent suonty resistance conductor through the cam-wont out contacts 22 conductor 23, resistance and conductor N to the conductor leading to the secondary apparatus.

The circuit controlling device fit of the secondary anoaratus of Fig. 1 comprises a reckahle line conductor 32.

and a spring dog it! pivotally mounted on an aim. 3b which carries the armature ill for the driving magnet l. This pivoted spring dog 29 is normally prevented from engaging the actuating arm it of the contact 26 by means of a circular disc 32 on the shaft 33 of the driven ratchet 36 but is enabled to engage this actuating arm in a certain position of the secondary apparatus when the notch 35 in the circular disc 32 comes opposite the pin 36 on the pivoted dog flll. In this position. the pin on the pivoted dog enters the notch Elli on the circular disc and in so do-= ing engages the end of the actuating arm 2'1], opening the circuit for the drive magnet l and closing the circuit for the weak current magnet The circuits for the secondary apparatus of Fig. l comprise a circuit for the driving magnet l and a circuit for the small weak current magnet The circuit for the driving magnet l is from the line conductor 25 through the conductor ill, oscillatable contact 2%, contact 38, conductor magnet l and conductors till and (ll to the other The circuit for the weak current magnet ll is from the conductor 37!, through the contacts 26 and lll, conductor 36, magnet 9 and conductor ill to the line conductor 62.

In operation, the repeating relay l is energized once each minute by the momentary closure of minute contact l, and atcontacts lli connects the battery or other source of current it to the v conductors 2b and 32 extending to the secondary These minute impulses pass through.

apparatus. the secondary magnets l and operate the associated apparatus step by step.

Each time magnet l is energized, the dog rocks on its pivot lli, since the pin it strilres against the periphery of the disc When the secondary apparatus is in position 5b, the notch 35 in disc 32 lies opposite the 1 1. 1 36 on dog 29, so that when the next impulse energizes magnet 77, the pin it will enter the notch 3th.;

Referring now' to the master clock circuit, at approximately five minutes, or any other desired time, before the master clock reaches position tt, contacts 2'22 are closed by cam ll, thereby connecting the resistance 5 across the 'impulsing contacts d5 of relay l. The resistance t is made sumciently high so that the continuous current which flows over the circuit during the synchro nizing period is insufficient to interfere with the release of the secondary magnets l, but is sumcient to hold up the small relays t once they are operated. Contacts 22 are opened shortly before (for example, ten seconds) the master clock sumed for the purpose of explanation only, does not interfere with the regular advancing operations of the secondary apparatus by the master clock. During this time, the regular minute im-= pulses and the fast accelerating impulses are sent out by the operation of relay l in theregular ltl manner. At each impulse contacts dd close, thereby connecting the full potential of the current source it to the line and bringing about the operation of the secondary magnets. When aceaecr the contacts open at the end of each impulse, the magnets release since the current through resistance i5 is insumcient to maintain them operated.

It will be assumed that the secondary apparatus S2 is fast and reaches position bit before the master clock. When the next impulse is re'= ceived, magnet l operates and in this position the pin on the dog 29 can enter the notch in disc in doing so,.it mechanically operates the armature ll of relay 9, thereby opening contacts and 2t andclosing contacts 26 and 13. In order to make sure that the armature 3i will complete its movement, it may be desirable that the contacts and 26 should not be opened until the contacts 26 and 53 are closed. For this purpose the contacts 38, 2t and :33 may be of the make-before-brcak type, the contact 38 being biased to follow downwardly with the contact it until the contacts'iti and 413 are closed, after which the contacts 38 and 2b are opened by further movement of the contact 26. ing of contacts 38 and it opens the circuit of magnet l, allowing the magnet to release and advance the secondary apparatus into position The closing of contacts 2t and d3 completes "the locking circuit for relay El and this relay is mains in position 5%.

Apparatus, such as St which is slow or on time will continue to be advanced by the regular minute impulses and by the rapid accelerating impulses, if slow, received during the fifty-ninth minute. When Sl reaches position W, the notch 35 in disc 32 will be opposite the pin 36 on the dog 29. When the next impulse is received, contacts 38 and 26 will be opened and contacts it and ltl closed. This opens the circuit to magnet l, which releases and advances Si into position 59, and completes the locking circuit to relay 9, which is held operated by the sustained weak current. All the secondary apparatus is now held inoperative in position 59.

Shortly before the master clock reaches position lit, contacts 22 are opened, removing resistance b from the circuit and cutting on the weal: current. Relays t accordingly release, opening their locking circuits at contacts it and again preparing the impulsing circuits to magnets l at contacts 38. When the master clock reaches position til, the regular minute impulse is transmitted to these magnets, advancing the secondary apparatuses into position Eli and into synchronismwith the master clock. be stated that the pin 36 on the dog 29 can enter the notch 35 in the disc 32 only when the magnet l is energized with the apparatus in position 53. The relays therefore, cannot be again operated until the succeeding synchronizing period.

It will be noted that the armatures of relays ii and the associated contacts are mechanically Y operated when magnets l are energized with the secondary apparatuses in position 58. This construction necessitates the location of the relay in the secondary apparatus adjacent to the magnet so that the necessary mechanical connections can be made to efiect the above operation In some cases, the space maybe limited so that the The open- It should relay cannot be placed adjacent to the magnet and the mechanical operation of the relay armature can'notreadily be accomplished. The modiiication shown in Figure 2 of the drawing was de- 5 signed for cases which space was limited as this modification "permits the placing of the relay anywhere in the secondary apparatus and, it necessary, outside of the apparatus altogether.

The principle operation of the circuit of m Figure 2 is practically the same as that of Figure 1., The master clock; MI is identical in all respects will the master clock M of Figure 1, The armat e levels 3!) of the secondary magnets l are c wded with cted dogs 28 which cooperate same manner as the corres oohding parts Figure 1. The melmer of operating relays '5, ioweyer, is somewhat difierent. secondary apparatus of Fig. 2 comprises Li e driving mac-wet l, a ratchet and pawl mechsm 8 driven 1 said driving magx iet, a small weal: c zrrent set 9 controlled by secondary time, "cable of holding armature under the influence of the current from he master ctoc M to the co -gcl or the weak current ETOHL the connector 55 through actor contacts 63 and conductor 59.

When a secondary apparatus, ste l-l 53, is position 58 and its magnet I is energised by the her-it impulse, the pin 36 on the dog 29 enters the notch 35 in disc 32 and operates the lever 58. This 1 closes contacts 52 and 53 which complete the cirll cult from the line through the winding or" relay 9.

Relay is operated lay the current impulse and at contacts 58 and 56 seems the circuit to the secondary magnet l which releases and advances the secondary apparatus into position 59. The release of l also opens contacts 52 5 and, 53, thereby opening the original operating circuit of This relay, however,

is now held. cpe'l ed over its locking circuit including contacts 553 and 50 which were closed when the relay 3 operated, Relay" 8 is held operlo ated by the wee, c rent maintained on the line during the sync misting period as explained in connection with cre 1,

Slow apparatl W apparatus on time, such as 533, will continue o operated by the regular minute "impulses a lay the rapid ac celera'mg impel" rom the master cloc splashed. hen reaches pos ion cezlves the succeeding impulse,

contacts 52 ,J are bring about the opera of rel 9, the cleel izatlcn of the 1 a: Y of the appaiiuo 12W. Q contacs ll of the up of relay a ow in "ore 2 master cloolz are 1enological a" operatand means cons all of c -a ielay for maincllh means in operated l a secondas apparatus for use in a time controlled system, clack mechanism, an operating magnet for advancing said mechanism, a relay for opening the circuit of said magnet, means controlled by said magnet and operative only armature, a relay, contacts controlled directly by said armature and operative only upon energize.- tion of said magnet when said apparatus is in a predetermined chronological position for completing an operating circuit for said relay, and means controlled by said relay for opening the circuit to said magnet and for closing a locking circuit to hold said relay operated when said contacts are opened by the deenergization of said magnet.

6. In a corrective time controlled system, master apparatus and secondary apparatus connected by a two-wire control circuit, an operating magnet in said secondary apparatus connected to said circuit, means in said master apparatus for transmitting regular operating impulses and rapid accelerating impulses over said circuit to operate said magnet to advance said secondary apparatus, means effective when said secondary ape p-aratus reaches a predetermined chronological position for preventing continued advance thereof, and means in said master apparatus for transmitting a sustained relatively weak current over said circuit to said secondary apparatus to maintain said last means effective.

7. In a corrective time controlled system, master apparatus and secondary apparatus connected by a two-wire control circuit, clock mechanism in said secondary apparatus, means in said secondary apparatus responsive to impulses transmitted from said master apparatus over said circuit for advancing said clock mechanism, means for preventing continued advance of said mechanism when it reaches a predetermined chronological position, and other means operated by said master apparatus over said circuit to maintain said preventing means efiective, said maintaining means being released when said master apparatus reaches a corresponding chronological position to again permit advance of said clock mechanism by received impulses. V

8. A corrective arrangement for a time controlled system comprising master apparatus and secondary apparatus connected by a control circuit, means in said master apparatus for transmitting normal operating impulses and rapid accelerating impulses over said circuit and for transmitting a relatively weak sustained current,

thereover for a period during which a plurality of said normal impulses and all of said accelerating impulsesare transmitted, means in the secondary apparatus for periodically preventing continued advance thereof at a predetermined point in its cycle of operation, and means controlled by said sustained current for maintaining said last means effective.

9. In a corrective time controlled system, master apparatus and secondary apparatus connected by a two-wire control circuit, means for advanc ing said secondary apparatus responsive to impulses transmitted over said control circuit from said master apparatus, means for preventing continued advance of said secondary apparatus when it reaches a predetermined chronological position, holding means for maintaining said last-named means effective, and means in said master apparatus for transmitting a relatively I weak current over said control circuit to said secondary apparatus to maintain said holding ineans in operative position until said master apparatus reaches a corresponding chronological position.

10. In a master clock for use in a corrective time controlled system, an outgoing two-wire con- 'trol circuit, means for transmitting normal operating impulses over said circuit at one rate, means for transmitting a number of accelerating impulses over said circuit at a greater rate, and means for transmitting a sustained relatively weal; current impulse over said circuit during the time a plurality of said normal impulses and all of said accelerating impulses are transmitted.

11; In a master clock for use in a corrective time controlled system, an outgoing two-wire control circuit, means for transmitting over said circuit a plurality of normal operating impulses at regular intervals, means for transmitting a plurality of rapid accelerating impulses, during the interval between two ofsaid normal impulses, and means for maintaining in said circuit a relatively weak continuous current for a period during which a plurality of said normal impulses and all of said accelerating impulses are transmitted thereover.

12. In a master clock for use in a corrective time controlled system, an outgoing control circuit, a source of current, a pair of contacts for connecting said source of current to said circult, means for closing said contacts to transmit a series of normal operating impulses at regular

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