GB147940A - Improvements in and relating to sound transmitting and receiving apparatus - Google Patents

Improvements in and relating to sound transmitting and receiving apparatus

Info

Publication number
GB147940A
GB147940A GB19995/20A GB1999520A GB147940A GB 147940 A GB147940 A GB 147940A GB 19995/20 A GB19995/20 A GB 19995/20A GB 1999520 A GB1999520 A GB 1999520A GB 147940 A GB147940 A GB 147940A
Authority
GB
United Kingdom
Prior art keywords
attached
supports
coils
relating
receiving apparatus
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
Application number
GB19995/20A
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.)
Signal GmbH
Original Assignee
Signal GmbH
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 Signal GmbH filed Critical Signal GmbH
Publication of GB147940A publication Critical patent/GB147940A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Electromagnets (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

147,940. Signal Ges. Aug. 6, 1917, [Convention date]. Subaqueous audible signals.-Coils attached to the oscillating parts of electro-magnetic transmitters and receivers are liable, owing to the comparative looseness of their structure, to introduce excessive damping and an indeterminate inertia effect. Various expedients are adopted to avoid this difficulty. The coils may be Bakelized in grooves or slots, as shown in Fig. 1, so as to be rigid with their supports; or they may be carried by weak springs between washers of soft material, or attached to the vibrating structure at a nodal line, so as not to partake of the vibratory movement. An arrangement of the last kind is shown in Fig. 3, in which the diaphragm 1 is formed with a profile as shown at 14 so as to vibrate with a node circle at 15, where the supports for the coil 5 are attached.
GB19995/20A 1917-08-07 1920-07-09 Improvements in and relating to sound transmitting and receiving apparatus Expired GB147940A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE345579T 1917-08-07

Publications (1)

Publication Number Publication Date
GB147940A true GB147940A (en) 1921-10-10

Family

ID=33459965

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19995/20A Expired GB147940A (en) 1917-08-07 1920-07-09 Improvements in and relating to sound transmitting and receiving apparatus

Country Status (5)

Country Link
US (1) US1640538A (en)
DE (1) DE345579C (en)
FR (1) FR524959A (en)
GB (1) GB147940A (en)
NL (1) NL9442C (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920307A (en) * 1954-07-19 1960-01-05 Jersey Prod Res Co Variable gap reluctance transducer
US3725856A (en) * 1956-09-24 1973-04-03 Us Navy Push-pull transducer
US2906995A (en) * 1956-11-14 1959-09-29 Jersey Prod Res Co Variable gap reluctance transducer
US3260990A (en) * 1962-01-03 1966-07-12 Dynamics Corp America Electroacoustic transducer
US3611280A (en) * 1968-05-10 1971-10-05 Marshall E Sheehy Detection means
US3538494A (en) * 1968-11-26 1970-11-03 Hazeltine Research Inc Acoustic conversion apparatus
US4757548A (en) * 1985-12-02 1988-07-12 Fenner Jr Thomas C Speaker system and dome-shaped enclosure therefor
US4763307A (en) * 1987-01-20 1988-08-09 Frank Massa Wide-range audio frequency underwater transducer
US5117403A (en) * 1991-05-31 1992-05-26 Adolf Eberl Above and below water sound transducer
US8488415B2 (en) 2010-08-26 2013-07-16 Curtis E. Graber Submersible electro-dynamic acoustic projector

Also Published As

Publication number Publication date
FR524959A (en) 1921-09-13
US1640538A (en) 1927-08-30
NL9442C (en)
DE345579C (en) 1921-12-14

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