US2693505A - Circuit-arrangement in an automatic signaling system for the numerical adjustment of a final selector under the control of pulses - Google Patents

Circuit-arrangement in an automatic signaling system for the numerical adjustment of a final selector under the control of pulses Download PDF

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Publication number
US2693505A
US2693505A US188535A US18853550A US2693505A US 2693505 A US2693505 A US 2693505A US 188535 A US188535 A US 188535A US 18853550 A US18853550 A US 18853550A US 2693505 A US2693505 A US 2693505A
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Prior art keywords
contact
pulse
contacts
selector
circuit
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Expired - Lifetime
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US188535A
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English (en)
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Buchner Robert Bertold
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Hartford National Bank and Trust Co
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Hartford National Bank and Trust Co
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Definitions

  • the invention relates to a circuit-arrangement in an automatic signalling system, for example, an automatic telephone system, for the numerical adjustment of a finalsingle-motion selector of fixed rest position under the control of pulses.
  • a pulse contact alternately supplies a start indication and a stop indication alternately to the contacts of one group and those of the other group, any further contacts having a start indication.
  • the controldevice; of the switch tests, by way of a testing arm, the character of the indication. The control device arrests the switch when the test arm reaches a marking contactwhich has a stop indication, and it causes the switch tocontinue its movement when the marking contact reached has a start indication.
  • the breaking contact In the rest position of the selector the breaking contact has a stop indication.
  • the indications are interchanged and the selector moves on until a marking contact of the other group having a stop indication is reached.
  • the pulse contact again interchanges the indications, so' that the contact at which the selector was arrested assumes a start indication and the selector moves on until a contact of the other group is reached which now has a stop indication; Hence the arrangement operates as an electric escapement.
  • the stop indication may be constituted, for example, by the presence of voltage across the marking contact, whereas a contact with start indication has no voltage and is thus not connected to a source of voltage, or
  • the stop indication may be constituted by the absence of voltage and the start indication by the presence of voltage.
  • This method has the advantage that single-motion switches may be used, which are simpler and cheaper than switches of bi-dimensional motion, registers or separate adjusting switches being dispensed with. Since the spacings between the contacts at which the selector is arrested :at the end of a pulse series may be varied within wide with self-interrupting contacts have the disadvantage that .the speed cannot be increased to a sufficiently high extent, so thatthe reliability of the adjustment is seriously affected.
  • the invention mitigates these disadvantages and provides a circuit-arrangement in which both the tens adjustment and the adjustment to the desired outlet are effected with the use of an electric escapement.
  • the invention is characterized in that the groups of contacts associated with the same tens are divided into "ice two main groups and the contacts of each tens of the first main group are arranged between contacts of a decade of the second main group.
  • the pulse contact member during a unit pulse series, supplies a stop indication and a start indication alternately to the contacts of one main group and those of the other main group such that at the adjustment to a contact of the main group during the unit pulses, the contacts of this main group exhibit the start indication.
  • Fig. 2 shows one embodiment of a circuit-arrangement according to the invention.
  • Fig. 1 shows a number of marking contacts 1 to 10 of a switch, which are contacted by the same test wiper T.
  • the wiper T engages contact 1.
  • the contacts having odd numbers are connected to a common line L1 while the contacts having even numbers are connected to a line L2.
  • the winding of rotary magnet D of the switch is arranged intermediate the wiper T and a terminal of a battery Ba, the other terminal of which is connected to earth potential. nects the line L2 to earth across its break contact. The rotary magnet D is then not energized and the switch is not in motion.
  • a pulse relay (not shown) moves the pulse member a to connect to the left, with the result that the contacts of odd numbers are connected to earth, that is to say, they assume the start indication.
  • the rotary magnet D is thus energized in a circuit passing from earth, across the make contact of a line L1, marking contact 1, test wiper T, the winding of the rotary magnet D to the battery Ba, thereby actuating the switch.
  • the unnumbered contacts arranged between the numerical contacts are connected to earth, so that when a test wiper strikes one of these contacts the rotary magnet remains energized and the switch moves on until a contact not connected to earth, that is to say, a contact exhibiting a stop indication, is reached. This, in the present case, is contact 2.
  • the switch remains on this contact till at the end of the pulse the pulse member a is moved back to the rest position.
  • the rotary magnet D is then re-energized and the switch moves to the next contact exhibiting a stop indication, that is to say, contact 3.
  • the next pulse moves the switch from contact 3 via contact 4 to contact 5, and so forth.
  • the contacts having odd numbers are consequently the contacts to which the switch can be numerically adjusted at the end of a pulse series.
  • a similar condition may prevail, if the switch reaches a contact having an odd number at an instant when a next following selection pulse has already started.
  • the contacts are engaged by the test wiper T of the final selector, D again designating the rotary magnet.
  • the contacts N, V2, 29, 20 and so forth are connected through line L1, and break contact of the relay 0 to the break contact of the pulse contact a of the pulse relay.
  • the contacts V1, 10 and so forth are connected through line L4 and break contact 0 to the make contact tact of the pulse contact a
  • the contacts 11, 31 and so forth are connected through make contact b of this relay also the line L4 and the break contact 0 to the make contact 11
  • the contacts 21, 22, 23 and so forth are connected through line L2 and break contact e of the relay E to earth and during the unit pulse series they are connected through make contact e to the line L1.
  • the busy relay C When the final selector is engaged by a group selector in the preceding stage, the busy relay C is energized through lead Ls, the rotary magnet D not being excited, since the make contact b is still open.
  • the dial pulses are supplied to the pulse relay A.
  • relay'A becomes operative andcloses through its make contact a an energizing circuit for relay B.
  • This relay is a slow-releasing relay so that it is held energized for the entire pulse series and is de-energized some time after the termination of the last pulse.
  • the armature a At the end of the first tens pulse the armature a returns to its rest position, so that a circuit is completed from earth through break contact a break contact 0 line L1, break contact N, test wiper T, make contact b make contact and the winding of rotary magnet D to battery Be.
  • the rotary magnet D is energized in this circuit.
  • the selector leaves the break contact N, but stops immediately at the next following contact, because this contact is now not connected to earth.
  • relay B If a second pulse of the tens series does not follow, relay B is de-energized, so that relay E is energized in a circuit from earth through winding of relay E, break contact 11 off-normal contact k of the selector, and make contact c to battery Ba.
  • Relay E completes a holding circuit for itself through make contact e independent of break contact 12 and connects the contacts 21, 22 and so forth, through a make contact e to the line L1 and through a make contact e the contacts 12, 13 and so forth to the line L4.
  • relay B Owing to the energization of relay A, relay B is ire-energized through a make contact 11 and is held energized for the unit pulse series.
  • This contact is connected to earth at the end of the second pulse through break contact a so that the rotary magnet D is re-energiz'ed and the selector moves to contact 12.
  • the selector is moved in a similar manner by the third unit pulse to contact 13.
  • the contact V1 acts as a preliminary contact for the first tens, that is to say, if the selector of the first pulse of the decade series stops at this contact, the selector moves after the first unit pulse to the first contact 11, associated with the first tens.
  • the tens pulse series will now be assumed to be formed by two pulses.
  • the selector is moved to contact Vi by the first tens pulse. Since after a definite time the first pulse is followed by a second, the relay B is held energized. The second tens pulse then moves the selector from contact V1 to contact 11 in exactly the same manner as did the first unit pulse in the preceding case, that is to say, the selector stops at contact V2 during the first pulse and at the end of the pulse moves to contact 11.
  • Contact 11 is the preliminary contact of the second tens.
  • relay B Since a third tens pulse does not follow, relay B is deenergized, so that, as in the preceding case, after the tens pulse series relay E is energized. Now a circuit is completed from battery Ba through break contact b line Ls, marking contact 11, brush T, break contact b and winding 01 of relay 0 to earth. Relay 0 is energized in this circuit and completes a holding circuit for itself through its make contact 0 and a second winding 02.
  • the change-over contact 0 and O commutate the pulse member a with respect to the lines L1 and L4.
  • the pulse member a may be commutated in a different manner, for example, with the use of a counting circuit in the selector or in the register, which commutates the pulse member after an even series of decade pulses.
  • Relay B is energized through make contact a and is held energized for the duration of the unit series.
  • the pulse member a At the end of the first unit pulse, the pulse member a reverts to its rest position, so that the line L4 is connected to earth through make contact 0 and break contact a The selector thus moves to contact 21.
  • the first pulse shifts the selector relatively to one contact only.
  • the second unit pulse shifts the selector to contact 22, the third pulse to contact 23, and so forth, in a manner exactly similar to that described above.
  • the first two pulses move the selector to contact 11. Upon passing this contact, relay 0 is not energized, since relay B is held energized.
  • contact 11 is earthed.
  • the selector leaves this contact and passes by the contacts 12 to 19 and 21 to 23, since they are connected to earth through break contacts e and e
  • the selector reaches contact 29 before the pulse has ceased, it stops at this contact and moves towards contact 10 on at the end of the pulse.
  • the fourth tens pulse moves the selector to contact 31, the preliminary contact of the fourth tens, whence the adjustment to the desired outlet takes place similarly to the second decade.
  • contact 30 is the preliminary contact of the fifth tens and contact 51 the preliminary contact of the sixth tens, and so forth.
  • relay C is de-energized, so that rotary magnet D is energized in the circuit of battery Ba, rotary magnet D, break contact C and off-normal contact IQ of the selector to earth, and the selector moves until in the rest position contact K opens.
  • the circuit-arrangement may bevaried' in a number of ways; thus, for example, the start indication may be constituted by non-connection of. a marking contact to earth or to a battery, while the contacts having a stop indication are connected to earth or to a battery. If desired, further contacts may be arranged between the decade contacts shown, for example, non numerical contacts and contacts of outlets to which P. B. X-lines are connected.
  • a circuit arrangement responsive to pulses of a tens pulse series and of a unit pulse series for the numerical adjustment of a final single-motion selector of fixed rest position, said selector having a test wiper and first and second groups of individual contacts, each of said groups having a subgroup representing the same tens, the contacts of the first group being disposed between the contacts of the second group, the contacts of said first and second groups being respectively designated as preliminary and intermediate contacts, said circuit arrangement comprising a pulse contact member for supplying during the periods between the beginning and end of a tens pulse series a stop indication to said preliminary contacts and a start indication to said intermediate contacts, said pulse member during a unit pulse series supplying alternately a stop indication and a start indication to the subgroup of the first group and the subgroup of the second group, commutation means coupled between said member and said first and second groups to interchange the indications supplied to said preliminary and intermediate contacts at the beginning and end of each tens pulse series, and a control device coupled to said selector and including
  • a circuit arrangement as set forth in claim 1 furthenincluding means causing the pulse contact member during a unit pulse to supply a start indication to the subgroup of the first group when after a decade pulse series the selector has been arrested and its test Wiper has reached a contact of the subgroup of the first group, and wherein said commutation means includes means to commutate said member when the selector has been arrested and its test wiper has reached a contact of the subgroup of the second group.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Relay Circuits (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
US188535A 1949-10-07 1950-10-05 Circuit-arrangement in an automatic signaling system for the numerical adjustment of a final selector under the control of pulses Expired - Lifetime US2693505A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL291944X 1949-10-07

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US2693505A true US2693505A (en) 1954-11-02

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US188535A Expired - Lifetime US2693505A (en) 1949-10-07 1950-10-05 Circuit-arrangement in an automatic signaling system for the numerical adjustment of a final selector under the control of pulses

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US (1) US2693505A (en, 2012)
BE (1) BE498516A (en, 2012)
CH (1) CH291944A (en, 2012)
DE (1) DE838621C (en, 2012)
FR (1) FR1028851A (en, 2012)
NL (2) NL149217B (en, 2012)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767247A (en) * 1953-04-23 1956-10-16 Automatic Elect Lab Arrangements for single-motion numerical switches in telephone systems

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1648009A (en) * 1927-11-08 Machine-switching selector-switch
US1877883A (en) * 1931-10-19 1932-09-20 Associated Electric Lab Inc Automatic telephone system
US1903207A (en) * 1931-03-02 1933-03-28 Associated Electric Lab Inc Telephone system
US1914384A (en) * 1931-11-09 1933-06-20 Associated Electric Lab Inc Telephone system
US2057890A (en) * 1934-05-09 1936-10-20 Siemens Ag Telephone system
US2291481A (en) * 1940-06-22 1942-07-28 Bell Telephone Labor Inc Telephone system
FR895485A (fr) * 1942-06-12 1945-01-25 Materiel Telephonique Systèmes de téléphonie automatique ou semi-automatique
US2416086A (en) * 1944-01-12 1947-02-18 Siemens Brothers & Co Ltd Automatic selecting switch
US2454809A (en) * 1941-06-10 1948-11-30 Int Standard Electric Corp Telephone system utilizing register controlled final selector switches
US2506200A (en) * 1943-12-13 1950-05-02 Ericsson Telefon Ab L M Device for selection of groups of lines within automatic telephone exchanges
US2547043A (en) * 1942-03-13 1951-04-03 Int Standard Electric Corp Automatic control of selectors by register potential matching

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1648009A (en) * 1927-11-08 Machine-switching selector-switch
US1903207A (en) * 1931-03-02 1933-03-28 Associated Electric Lab Inc Telephone system
US1877883A (en) * 1931-10-19 1932-09-20 Associated Electric Lab Inc Automatic telephone system
US1914384A (en) * 1931-11-09 1933-06-20 Associated Electric Lab Inc Telephone system
US2057890A (en) * 1934-05-09 1936-10-20 Siemens Ag Telephone system
US2291481A (en) * 1940-06-22 1942-07-28 Bell Telephone Labor Inc Telephone system
US2454809A (en) * 1941-06-10 1948-11-30 Int Standard Electric Corp Telephone system utilizing register controlled final selector switches
US2547043A (en) * 1942-03-13 1951-04-03 Int Standard Electric Corp Automatic control of selectors by register potential matching
FR895485A (fr) * 1942-06-12 1945-01-25 Materiel Telephonique Systèmes de téléphonie automatique ou semi-automatique
US2506200A (en) * 1943-12-13 1950-05-02 Ericsson Telefon Ab L M Device for selection of groups of lines within automatic telephone exchanges
US2416086A (en) * 1944-01-12 1947-02-18 Siemens Brothers & Co Ltd Automatic selecting switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767247A (en) * 1953-04-23 1956-10-16 Automatic Elect Lab Arrangements for single-motion numerical switches in telephone systems

Also Published As

Publication number Publication date
BE498516A (en, 2012)
NL149217B (nl)
DE838621C (de) 1952-05-12
NL74001C (en, 2012)
FR1028851A (fr) 1953-05-28
CH291944A (de) 1953-07-15

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