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US1665622A - Calling device - Google Patents

Calling device Download PDF

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Publication number
US1665622A
US1665622A US538497A US53849722A US1665622A US 1665622 A US1665622 A US 1665622A US 538497 A US538497 A US 538497A US 53849722 A US53849722 A US 53849722A US 1665622 A US1665622 A US 1665622A
Authority
US
United States
Prior art keywords
signal
relay
shoulders
drum
movable element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US538497A
Other languages
English (en)
Inventor
Chauveau Louis Lucien Eugene
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US1665622A publication Critical patent/US1665622A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L15/00—Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code
    • H04L15/24—Apparatus or circuits at the receiving end
    • H04L15/26—Apparatus or circuits at the receiving end operating only on reception of predetermined code signals, e.g. distress signals, party-line call signals

Definitions

  • AThe present invention relates to an apparatusbelonging to the category of selective calling devices.
  • the particular object of the invention is to cause the actuation of a call indicating device such as a lamp, bell, etc., inlresponse to a series of signals having a predetermined duration and succeeding each other at predetermined time intervals, such as, a letter or combination of letters, or numbers, of the Morse code.
  • This apparatus is particularly applicable to receiving. stations for wireless or wire telegraphy or telephony.
  • the apparatus comprises an element movable preferably at a. uniform speed to traverse a certain course ⁇ for causing the operation of the call. ⁇
  • the lmovable element acauses the operation of a switch which maintains a restoring magnet of the movable element deenergized during the time intervals corresponding to the silent periods of the selected series of call signals.
  • the received signals maintain the magnet in the deenergized condition. If the operation caused by the movable element and the action of the ⁇ signals received f do not correspond, i. e. if the series of signals received is not the one for which the apparatus isl adjusted, the movable element is restored to its normal position of waiting condition, and the calling element is not actuated.
  • an electromagnet 1 of the plunger type is provided with a core -2 of soft iron suspended at the'end of a string 3.
  • the string may be wound ona drum 4 rotatable around a shaft A5.
  • the drum 4 is provided with a restoring spring 4 such as a coiled spring having one end connected to the drum and the other to the shaft. The adjustment of the arrangement is such that when theelectromagnet 1 is not energized, its core 2Adescends and through the agency of the string 3 causes drum 4 to rotate.
  • a toothed wheel 6 throughk lthe agency of a pawl 7.
  • the toothed wheel is mounted on a common shaft with a pinion 8. Through the agency of a worm on shaft 9, the pinion actuates a fan 9.
  • the core 2 rises and the ⁇ drum 4 is rotated in the other direction by its spring ⁇ the pawl 7 slides back overthe teeth of wheel 6.
  • the operation is the same-as in the usual ratchet and pawl arrangement.
  • the pawl 7 moves in one direction it can drive the ratchet wheel 6, but when it moves in the opposite direction it slides over the teeth of wheel 6 imparting no motion thereto.
  • the regulator comprising the fan and the parts connected thereto affects the speed of the core 2 only during the descent of the latter, the rising due to magnetization of the core being lsubstantially instantaneous.
  • VThe c ore 2 carries a controller 10 having a certain number ofV Contact shoulders 10,
  • the sending of the signaly by the calling i station actuates the relay signall 13 connected to the receiverwhereby, when the letter corresponds to the arrangement of the shoulders on member 10, the relays v12 and 13 are successively actuated. This'is accomplished y i.
  • the relay 12 controls and the relay 13 the contact 15, V15. These contacts are mounted and so connected that thecontacts 14, 14' f both of the relays 12 and 13 must cooperate to close ther battery circuit through the electromagnet 1. If both relays ⁇ 12 and 13 are deenergized the circuit of the electromagnet 1 is closed, the normally closed circuit being as follows; plus poleofl battery ative When the controller and signal responsive means supplement each other.
  • a plunger mounted to descend by gravity a certain distance during ay period corresponding to the call, governing means for regulating the speed of descent of said plunger, means for connecting said governing means to said plunger when said yplunger is traversing its course, resetting and means for governing the descent of said plunger, a normally closed circuit including a coil cooperating with said plunger for preventing its descent, a controller corresponding to the callconnected to said plunger, means responsive to signals, means for causing said controller and signal respon' sive means to cooperate to maintain an open circuit When the cont-roller andk signal responsive means supplement each other.
  • a calling device for operation under the action of signals formed by short and long electrical impulses, said impulses being combined in any desired manner to produce a signal
  • a calling device for operation under the action, of signals formed by short and long electrical impulses, said impulses being combined in any desired manner to produce a signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
US538497A 1921-03-22 1922-02-23 Calling device Expired - Lifetime US1665622A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR412575X 1921-03-22

Publications (1)

Publication Number Publication Date
US1665622A true US1665622A (en) 1928-04-10

Family

ID=8897793

Family Applications (1)

Application Number Title Priority Date Filing Date
US538497A Expired - Lifetime US1665622A (en) 1921-03-22 1922-02-23 Calling device

Country Status (4)

Country Link
US (1) US1665622A (fr)
DE (1) DE412575C (fr)
FR (1) FR543176A (fr)
GB (1) GB177488A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462875A (en) * 1944-08-15 1949-03-01 Standard Telephones Cables Ltd Automatic alarm signaling system
US2487178A (en) * 1947-06-04 1949-11-08 Martha W C Potts Divided channel telegraph system
US2489638A (en) * 1944-12-11 1949-11-29 Ipsophon Patentgesellschaft A Arrangement for switching on and initiating processes by means of telephone calls
US2598356A (en) * 1949-11-19 1952-05-27 Mcgraw Electric Co Remote switch control
US2669706A (en) * 1950-05-09 1954-02-16 Bell Telephone Labor Inc Code selector
US2812509A (en) * 1953-08-31 1957-11-05 Sperry Rand Corp Private line system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1019375B (de) * 1953-06-22 1957-11-14 Landis & Gyr Ag Empfangseinrichtung mit Synchronwaehlern fuer nach dem Impulsverfahren arbeitende Zentralfernsteueranlage mit Tonfrequenzueberlagerung auf Starkstromnetzen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462875A (en) * 1944-08-15 1949-03-01 Standard Telephones Cables Ltd Automatic alarm signaling system
US2489638A (en) * 1944-12-11 1949-11-29 Ipsophon Patentgesellschaft A Arrangement for switching on and initiating processes by means of telephone calls
US2487178A (en) * 1947-06-04 1949-11-08 Martha W C Potts Divided channel telegraph system
US2598356A (en) * 1949-11-19 1952-05-27 Mcgraw Electric Co Remote switch control
US2669706A (en) * 1950-05-09 1954-02-16 Bell Telephone Labor Inc Code selector
US2812509A (en) * 1953-08-31 1957-11-05 Sperry Rand Corp Private line system

Also Published As

Publication number Publication date
GB177488A (en) 1923-04-03
DE412575C (de) 1925-04-24
FR543176A (fr) 1922-08-29

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