US1867209A - Alarm selector apparatus - Google Patents

Alarm selector apparatus Download PDF

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Publication number
US1867209A
US1867209A US364720A US36472029A US1867209A US 1867209 A US1867209 A US 1867209A US 364720 A US364720 A US 364720A US 36472029 A US36472029 A US 36472029A US 1867209 A US1867209 A US 1867209A
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US
United States
Prior art keywords
relay
contact
line
dash
energized
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
US364720A
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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
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Individual
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Filing date
Publication date
Priority claimed from US320397A external-priority patent/US1967396A/en
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US1867209A publication Critical patent/US1867209A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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

  • the present application covers two improvements in the apparatus forming the subthere is shown a signal selector device which is adapted to distinguish between a proper redetermined signal and improper signals. ore specifically the device as described in' my copending application is so constructed that upon receipt of a predetermined signal an alarm is actuated.
  • the apparatus for accomplishing this consists of a relay system which measures the time interval of incoming signals, the time interval of spaces and the number of correct signals. If a signal im-.
  • One of the objects of the present invention is to prevent the selector mechanism from bea ing acted upon by ordinary signals.
  • Another object of this invention is to simplify the arrangement of the assembly which measures the length of the spaces or intervals between signals.
  • Another object is to vent the receiving relay which responds continuously to radio signals from hammering on the balance mechanism operating rod.
  • a further object of this invention is to pro vide means to simplify the space controlling ap aratus.
  • e- Morse-code signals generally used in radio telegraphy consist of dots having -a len h of an order of one-tenth of one second, an dashes of an order of three-tenths of one second. Now, if these signals are received directly in the receiving relay 54 as provided provide means to prei,
  • an auxiliary relay MN is added to the device which is controlled by the breaker of the radio relay 56.
  • the said auxiliary relay MN in turn controls 54.
  • the relay MN is retarded, for instance, by furnishing it with a copper sheath, in accordance with ordinary practice in telephone work.
  • This time-lag relay consists, for instance, of a wire FI mounted between'the contact 5 and the contact 22 of relay 42 as disclosed in my said copending application. The said wire will then be traversed by the current during the intervals of time between the 'si nals .andwill lengthen it.
  • This wire contra a contact CT in such a way that this contact is closed when the wire is hot and open when the wire is cold.
  • the hot-wire time-lag relay could evidently be replacedby any other type of retarded relay such as the dash dot and similar kind.
  • the dash controller assembly is now prepared and ready to measure the first dash. Presupposing that balance wheel 49 makes a complete swing in one second, then during the first half of the second which will be. one half the oscillation of wheel 49 rods 3 and 4 ascend, while during the second half of the second rod 3 descends and closes contact 6. The result of this is that an impulse is sent through the line 51. These movements are reproduced each second and at the end as soon as the impulses stop, contact 6 is open,
  • Line 51 is then united by way of contact 9 and line 52 to the input end of 28.
  • the latter operates at the end of the second second at the time the second impulse is passed.
  • 29 is the same as that as of 26, 27 the relay 29 will become operative immediately after the second impulse and thus causes connection of line 51 with group 30, 31 by way of its contact 10.
  • relay 30 At the end of the third second at the time of sending out the third impulse, relay 30 will operate; after this impulse relay 31 is energized and causes connection of line 51 over to the group 32, 33.
  • the electromagnets 26, 28, 30 and 32 are successively closed 1 in proportion as impulses are set into the line 51, that is to say, at the end of each second. Since it has been supposed that a four second dash is received at the end of the third second relay 30 when energized has caused current to flow into the line 47, the latter controls the group of recorder electromagnets 42, 43 and 41, 39, the electric operation ofwhich is exactly the same as that described for the set of electromagnets 26, 32, 27 and 33 etc.
  • electromagnet 42 is energized through the plus terminal of the right hand contact operated upon by relay 30, line 27, contact 13, relay 42 to minus via contact 36, and is so kept by its contact 12', while relay 41 remains shortcircuited by its keeper 13 and contact 14 of relay 3().
  • switch 55 is opened, electromagnet 54 is no longer energized, keeper 1 is released whereupon being drawn downwards by its spring 53 the balance wheel 49 is locked. Now at the same time, contact 5 leaves its upper contact, points +11 are no "longer fed and the release 26 to 32 and 27 to 33 being de-energized assume their original sets.
  • coils 20 and 21 of device 48 are equal but opposite, their action is neutralized and as a consequence contact 19" would have been opened and the flow of current in. line 64 40 would have been ineifective.
  • a selective apparatus responsive to a certain predetermined series of signal impulses separated by intervals, means for measuring the length of a particular signal impulse comprising a signal responsive device, an oscillating mechanism adapted to be set in motion thereby upon the receipt of a signal impulse and brought to rest at the end of said impulse, an electric circuit, means including said oscillating mechanism for pcriodically sending a current impulse through said circuit and a series of relay devices operativel associated with said circuit and means or successively operating said relay devices in accordance with said impulses, and means comprising a slow acting relay connected between the signal responsive device and said oscillating mechanism for rendering said oscillating mechanism operative only upon receipt of signals exceeding a predetermined length.
  • relay 48 has a I slight time lag 67 in order that relay 48 may remain energized a short instant after 26 has come to rest. Thus, the zero impulse by line effective. It is evident from what has preceded that every dash lasting longer than a second and less than 3 seconds w causes the system to be restored to zero. Every dash having system because oi: the balance wheel 49 and. b the present. improvement, namely, relay N every dash having a length less than a value predetermined by the relay MN will be communicated to the balance wheel at all.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Alarm Systems (AREA)
  • Relay Circuits (AREA)
  • Burglar Alarm Systems (AREA)
  • Electric Clocks (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
US364720A 1927-12-02 1929-05-21 Alarm selector apparatus Expired - Lifetime US1867209A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR657899T 1927-12-02
FR35676T 1928-05-22
US320397A US1967396A (en) 1927-12-02 1928-11-19 Alarm selector apparatus
US432316A US1934912A (en) 1927-12-02 1930-03-01 Alarm selector apparatus

Publications (1)

Publication Number Publication Date
US1867209A true US1867209A (en) 1932-07-12

Family

ID=27445048

Family Applications (2)

Application Number Title Priority Date Filing Date
US364720A Expired - Lifetime US1867209A (en) 1927-12-02 1929-05-21 Alarm selector apparatus
US432316A Expired - Lifetime US1934912A (en) 1927-12-02 1930-03-01 Alarm selector apparatus

Family Applications After (1)

Application Number Title Priority Date Filing Date
US432316A Expired - Lifetime US1934912A (en) 1927-12-02 1930-03-01 Alarm selector apparatus

Country Status (4)

Country Link
US (2) US1867209A (fr)
BE (2) BE356113A (fr)
FR (2) FR657899A (fr)
GB (2) GB301753A (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424579A (en) * 1943-03-10 1947-07-29 Int Standard Electric Corp Electric signaling system
US2462875A (en) * 1944-08-15 1949-03-01 Standard Telephones Cables Ltd Automatic alarm signaling system
US2505566A (en) * 1945-07-23 1950-04-25 Bell Telephone Labor Inc Signaling system
US2533765A (en) * 1947-01-29 1950-12-12 Radio Electr Soc Fr Selector apparatus for alarm signals
US2577283A (en) * 1946-08-14 1951-12-04 Bendix Aviat Corp Code identification system
US2589806A (en) * 1947-07-03 1952-03-18 Bell Telephone Labor Inc Selective signaling system
US2658188A (en) * 1948-06-29 1953-11-03 Bell Telephone Labor Inc Pulse position dialing system with direct time measuring apparatus
US2708744A (en) * 1951-04-12 1955-05-17 James T Neiswinter Selective signaling system
US2739180A (en) * 1952-10-21 1956-03-20 American Telephone & Telegraph Message address intercommunicating telegraph system
US2828358A (en) * 1953-02-13 1958-03-25 Int Standard Electric Corp Multiple telegraph signal regenerators
US2856457A (en) * 1952-06-26 1958-10-14 Int Standard Electric Corp Printing telegraph distortion indicator
US3360777A (en) * 1964-07-16 1967-12-26 Kolm Ind Pulse receiver responsive to plural code groups having predetermined time separation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2487678A (en) * 1945-10-05 1949-11-08 Harold A Stickel Code selective device

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424579A (en) * 1943-03-10 1947-07-29 Int Standard Electric Corp Electric signaling system
US2462875A (en) * 1944-08-15 1949-03-01 Standard Telephones Cables Ltd Automatic alarm signaling system
US2505566A (en) * 1945-07-23 1950-04-25 Bell Telephone Labor Inc Signaling system
US2577283A (en) * 1946-08-14 1951-12-04 Bendix Aviat Corp Code identification system
US2533765A (en) * 1947-01-29 1950-12-12 Radio Electr Soc Fr Selector apparatus for alarm signals
US2589806A (en) * 1947-07-03 1952-03-18 Bell Telephone Labor Inc Selective signaling system
US2658188A (en) * 1948-06-29 1953-11-03 Bell Telephone Labor Inc Pulse position dialing system with direct time measuring apparatus
US2708744A (en) * 1951-04-12 1955-05-17 James T Neiswinter Selective signaling system
US2856457A (en) * 1952-06-26 1958-10-14 Int Standard Electric Corp Printing telegraph distortion indicator
US2739180A (en) * 1952-10-21 1956-03-20 American Telephone & Telegraph Message address intercommunicating telegraph system
US2828358A (en) * 1953-02-13 1958-03-25 Int Standard Electric Corp Multiple telegraph signal regenerators
US3360777A (en) * 1964-07-16 1967-12-26 Kolm Ind Pulse receiver responsive to plural code groups having predetermined time separation

Also Published As

Publication number Publication date
FR657899A (fr) 1929-05-28
GB301753A (en) 1929-05-23
US1934912A (en) 1933-11-14
BE356113A (fr)
BE360487A (fr)
FR35676E (fr) 1930-03-27
GB312234A (en) 1930-05-22

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