US2579784A - Vibrator - Google Patents

Vibrator Download PDF

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Publication number
US2579784A
US2579784A US661216A US66121646A US2579784A US 2579784 A US2579784 A US 2579784A US 661216 A US661216 A US 661216A US 66121646 A US66121646 A US 66121646A US 2579784 A US2579784 A US 2579784A
Authority
US
United States
Prior art keywords
ring
disc
casing
chamber
outlet passage
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
US661216A
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English (en)
Inventor
Broden John Gustaf Mauritz
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.)
Kockums Mekaniska Verkstads AB
Original Assignee
Kockums Mekaniska Verkstads AB
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 Kockums Mekaniska Verkstads AB filed Critical Kockums Mekaniska Verkstads AB
Application granted granted Critical
Publication of US2579784A publication Critical patent/US2579784A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
    • G10K9/20—Sounding members
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/02—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by gas; e.g. suction operated
    • G10K9/04—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by gas; e.g. suction operated by compressed gases, e.g. compressed air

Definitions

  • One object of the invention is to provide a vibrator for converting with high emciency a direct-current in a pressure medium, such as air or gas, into a pulsating current, the said vibrator consisting of an oscillating member, suitably of the diaphragm type, which is arranged between a chamber onthe one side and one end of both an inlet and outlet passage for the pressure medium on the other side.
  • a pressure medium such as air or gas
  • Another object is to provide a. vibrator the oscillating member of which during the opening and closing of the said connection moves in resonance with the column of the pressure medium in the outlet passage.
  • a further object is to provide a self-controlled vibrator for signal apparatus which comprises a resonator or outlet passage which partly reflects and partly radiates the oscillation energy or transmits it in some other manner.
  • Fig. l of the drawing shows diagrammatically a longitudinal section through a vibrator according to the invention for a signal apparatus.
  • Figs. la and 1b are diagrammatic views illustrating various parts and forces acting thereon during the assemblance of the vibrator.
  • Fig. 1c is a sectional view to an enlarged scale of part of the vibrator.
  • Fig. id is a sectional view taken on the line ldld, Fig. 1c.
  • Figs. 2 and 3 show variants for the fixing of the oscillating member.
  • the vibrator according to Fig. 1 comprises a casing I with a cover 2, both provided with a flange 3 and 4, respectively, said flanges being connected to each other by means of bolts 5.
  • the inlet passage 6 and the outlet passage 1 are provided with screw threads 8 and 9 for the connection of an inlet tube for the compressed air and a horn or resonator H] which communicates with the passage 1.
  • the inlet passage 6 opens into an annular chamber II in the casing l, the said chamber ll surrounding the inner end of the outlet passage 1 which is formed by a tube3'l extending into the casing and having an annular edge l9.
  • the oscillating member consists of two discs or diaphragms l2 and i3 of which the disc I2 is circular and substantially unperforated, whereas the disc [3 is circular and provided with a large central hole so that it has the form of a ring.
  • the ring I3 has a somewhat larger external diameter than the disc 12.
  • the flanges 3 and 4 each have an outer, l4 and I5, and an inner, It and H, annular contact face or edge, of which the outer edges l4 and I5 are laid against one another when the flanges are tightened up, and the inner edges I6 and Ill clamp the ring 13 between them.
  • a gap 18 is formed serving the purpose when the bolts 5 are drawn up, of causing the flange 4 to bend in towards the gap l8, thereby causing the ring l3 to be subjected to forces directed radially outwards around its entire circumference
  • the contact edges Ii, [5 should be so constructed that they come into contact with each other before the contact edges [6, ll clamp the ring l3 between them.
  • Fig. la shows the flanges 3 and 4 at the moment the contact edges l4 and I5 come into contact with each other as a result of the action of the force F exerted by the bolts 5.
  • the contact edge ll Upon continued action of said force, the contact edge ll will be moved towards edge IS.
  • the flange 4 may then be regarded as a lever having its fulcrum at point P, and the endof the lever or edge I! will move along a circular path as indicated by the arrow C.
  • the force f' (Fig. 1b) which clamps the ring i3 between the edges H and [6, will consequently be directed slightly towards the left, as viewed in Figs. la and 1b, and may be regarded as the resultant of a vertical force iv and a horizontal force in.
  • the outlet passage 7 is constructed in such a manner that its contact edge 19 against the ring l3 lies in a plane which differs from another plane determined by the contact edge It. In Fig. l the first plane lies below the latter one. In consequence of this, when the ring 13 is clamped between the cover and the casing, the ring 13 will lie with'its inner peripheral portion pressed against the edge 19 of the outlet passage and will assume a certain curvature.
  • the disc I2 is inserted with a slight radial clearance in a recess 22 in the cover 2. Thus, it has a certain movement in its own plane.
  • the depth of the recess 20 is such that the disc i2 in its mounted position presses against the inner annular edge portion of the ring l3, and by means of the same pressure at its circumference, it lies against the bottom of the. circular recess 20.
  • an annular space 38 having a triangular cross-section will thus be formed.
  • will be formed between the cover 2 and the disc
  • the discs l2 and I3 are placed in recesses in the cover and screws 22 are screwed into the cover 2 around the circumference of the ring 13, the said screws holding the ring l3 in position by means of their heads without clamping the ring tight.
  • the disc i2 is thereby also held in position although it possesses a certain axial movement.
  • the cover with the discs can easily be set in its correct position with respect to the casing and screwed up tight by the bolts 5.
  • recesses 23 are provided corresponding to the heads of the screws 22.
  • may be entirely closed, but in order to prevent the occurrence of too high an internal pressure in the chamber which might render the starting of the vibrator diificult or even impossible in some cases, the chamber 2
  • this hole 24 is arranged in an inner projection 25 which extends from the cover into the chamber and is provided on the outside with a bore 26 having a relatively large diameter.
  • a corresponding hole 21 may be formed in the disc
  • the annular space 36 with the triangular cross-section between the discs l2 and I3 is in connection with the chamber 2
  • 2 may be provided with one or more holes 29 which directly connect the chamber with the annular space 36.
  • FIG. 2 a variant of the method for fixing the discs I2 and I3 is shown.
  • the contact edge of the casing against the ring I3 is replaced by a packing 3d.
  • the figure shows further how an annular passage 3
  • This arrangement has for its object to secure a satisfactory seal between the casing and the ring I3 and, in the event of compressed air leaking out between these parts notwithstanding, to lead this compressed air out to the atmosphere and prevent the compressed air from finding its way into the chamber 2
  • Fig. 3 shows a third method of fixing the ring
  • the outlet passage 7 has a special form which is described more particularly in connection with the Figures 4 and 5.
  • the mode of operation of the vibrator is as follows:
  • this leakage may be insuihcient and in order to be on the safe side an artificial leak is advantageously introduced in the form oi the hole 24. replaced by the hole 2'! which provides for a restricted communication between the chamber 2
  • the connection through the recess 28 and over the gap between the disc I2 and the cover 2 may be re placed by the hole 29 in the disc l2.
  • a vibrator comprising a casing, an inlet passage for the supply of fluid under pressure into said casing, a tube extending into said casing and it having an annular edge at its inner end, said tube forming an outlet passage for said fluid, a sound amplifying member communicating with said outlet passage, a vibratory diaphragm ring supported at its outer periphery in an air-tight manner by said casing and bearing at its inner periphery against said annular edge, a vibratory diaphragm disc supported at its periphery by said casing and bearing against the inner periphery of said ring, said disc and said ring and said casing forming between them an annular space, said ring being located between said inlet passage and said annular space, a substantially closed chamber on one side of said disc in opposite relation to said space and said outlet passage, and an open communication between said space and said chamber, said ring and said disc being operative by the differential between the pressures prevailing on both sides thereof to force said ring out of contact with said annular edge
  • a vibrator comprising a casing, an inlet passage for the supply of fluid under pressure into said casing, a tube extending into said casing and
  • the hole 24 may be having an annular edge at its inner end, said tube forming an outlet passage for said fluid, a sound amplifying member communicating with said outlet passage, a vibratory diaphragm ring supported at its outer periphery in an air-tight manner by said casing and bearing at its inner periphery against said annular edge, a vibratory diaphragm disc supported at its periphery by said casing and bearing against the inner periphery of said ring, said disc and said ring and said casing forming between them an annular space being substantially triangular in cross-section, said ring being located between said inlet passage and said annular space, a, substantially closed chamber on one side of said disc in opposite relation to said space and said outlet passage, and an open communication between said space and said chamber, said ring and said disc being operative by the differential between the pressures prevailing
  • a vibrator comprising a casing, an inlet passage for the supply of fluid under pressure into said casing, a tube extending into said casing and having an annular edge at its inner end, said tube forming an outlet passage for said fluid, a sound amplifying member communicating with said outlet passage, said casing comprising two parts, each part having an external flange, bolts securing said flanges to each other, said flanges having interengaging contact faces located outside said bolts and contact faces located inside said bolts, a vibratory diaphragm ring supported at its outer periphery between said last-named contact faces and bearing at its inner periphery against said annular edge, the distance between said first-named contact faces in a position of the casing parts'with their flanges facing each other with untightened bolts being slightly smaller than the distance between said secondnamed contact faces less the thickness of said diphragm ring, a vibratory diaphragm.
  • a vibrator comprising a casing, an inlet passage for the supply of fluid under pressure into said casing, a tube extending into said casing and having an annular edge at its inner end, said tube forming an outlet passage for said 7.
  • annular space a substantially closed chamber on one side; of; said discopposite. relation to said space and said utle passa e a d an, pen comm nica o b tweensaid space and said chamber, said ring and said disc beingoperative by the, difierential be-v tween thev pressures. prevailing in both sides thereof to force saidrii out of contact with; said annul r d n s id is ut f C n a t. th
  • a vibrator comprising a casing, an inlet passage; for; the supply of; fluid underpressure intosaid casing, atubegextending into said casing and having an annular edge at its inner end, said tube forming an outlet passage for said fiuid, a sound amplifying member communicating with said, outlet passage, a vibratory diaphragm; ring supported at. its outer periphery. in; an air-tight mannerby said casing; and bearing at its. inner periphery against said annular edge, a; vibratory diaphragm .discsupported, at its periphery. by said; casing andbearingagainst the inner periphery of R disc.
  • 6,.A vibrator comprising a. casing, an inlet passage for the supply of fiuid under. pressure into said casing, a tube extendingv into said casing andhaving an annular edge at its inner end, said. tube, formingan outletpassage for said fluid,,a,
  • said casing forming between them an annular speec said ring being located between said, inlet passage and said annularspace, and a substantilly closed. chamber on one side of said disc in opposite relation to. said space and said outlet. passage, said, disc having an aperture'forming an open communication between said space. and said chamber, said ring and said disc being operative. by the differential between the pressures. prevailing on both sides. thereof to force said ring out. of contact with. said annular edge and said. discv out of contact with said. ring, whereby to permit; flow of. fluid from: said inlet passage to said outlet passage and into saidspace. and said chamber, andv to seatsaid disc on. said. ring and:
  • A. vibrator comprising a casing, an inlet passage for the supply of fluid under pressure into said casing, a tube extending into said casing. and having an annular edge. at its inner end, said tube forming an outlet passage for. said fluid,
  • a soundamplifying member communicating with said outlet passage, a vibratory diaphragm ring supported atits outer periphery in an air-tight, manner by said casing and bearing at its inner periphery againstsaid annular edge, a vibratory diaphragm disc supported at its periphery by saidcasing and'bearing against the inner periphcry of said ring, said disc, and said ring and said casing forming between themv an annular space, said ring being located between said inlet passage and said annular space, a substantially closed chamber on one side of said disc in opposite relation to said space and said outlet passage, said; disc, having a restricted opening between said chamber and said outlet passage, and an open communication between said spaceiand said chambersaid ring and said disc being operative by the differential between the pressures prevail ing on both sides thereof to force said ring out of contact with said annular edge andsaid disc out of contact with said ring, whereby to permit flow of fluid, from said inlet passage to said outletpassageand
  • Avibrator comprising a casing, an inlet pas.- sage, for the. supply of. fluid under pressure into. said casing, a, tube. extending into said casing andhayingan. annular edge at its inner end,.said' tube forming;anoutletpassage for said'fluid, a sQlmd; amplifying member communicating with said outlet passage, as vibratory diaphragm ring. supported at its outer, periphery in an air-tight manner by said. casing and bearing.
  • a vibratory diaphragm disc supported at its periphery by said casing, and bearing against the inner periphery of; said ⁇ ring; said disc and said ring and said casing iormingbetween them an annular space, said ring being located between said inlet passage and said annular space, a substantially closed chamber onone side of said disc in opposite-relation to said space andsaid outlet passage, said chamber having; a restricted communication with-theambient air, and an openycommunication' between said" spacef and said.
  • said ring andsaidj disc being operative by the differential-between the pressures prevailing on bothsides thereof" to, force said ring out of contact with said-annular edge and said'discj out oficontact withusaidring, whereby to permit new of. fluid fromrsaid' inlet passage to saidjoutletpassage and into said space and said chamber, and

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Reciprocating Pumps (AREA)
  • Vibration Prevention Devices (AREA)
US661216A 1945-04-28 1946-04-11 Vibrator Expired - Lifetime US2579784A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2579784X 1945-04-28

Publications (1)

Publication Number Publication Date
US2579784A true US2579784A (en) 1951-12-25

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ID=20426333

Family Applications (1)

Application Number Title Priority Date Filing Date
US661216A Expired - Lifetime US2579784A (en) 1945-04-28 1946-04-11 Vibrator

Country Status (7)

Country Link
US (1) US2579784A (da)
DE (1) DE852967C (da)
DK (1) DK69476C (da)
ES (1) ES173354A1 (da)
FR (1) FR928843A (da)
GB (1) GB610745A (da)
NL (1) NL71133C (da)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2884892A (en) * 1954-12-01 1959-05-05 Nathan Mfg Corp Pneumatic sound producing device
US2918895A (en) * 1957-03-14 1959-12-29 Roy D Buell Fluid powered horn
US3420207A (en) * 1965-10-27 1969-01-07 Kockums Mekaniska Verkstads Ab Pneumatic diaphragm oscillators
US3429294A (en) * 1965-08-24 1969-02-25 Kockums Mekaniska Verkstads Ab Sound transmitter for gaseous operating fluid
US3710752A (en) * 1971-01-11 1973-01-16 Mercor Corp Locomotive warning horn

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1138344B (de) * 1958-09-10 1962-10-18 Keiichi Shintaku Schallerzeuger
DE1183839B (de) * 1961-10-24 1964-12-17 Service Electric Company Ltd Schallsender

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1281877A (en) * 1913-08-19 1918-10-15 Etienne Teste Automobile-horn.
US1663648A (en) * 1927-10-04 1928-03-27 Cooper Clark Whistle
US1730425A (en) * 1929-10-08 Acoustic device
US1757459A (en) * 1923-05-02 1930-05-06 Western Electric Co Sound-translating system
US2161995A (en) * 1935-07-22 1939-06-13 Arthur T Cahill Speaker and listening device
US2273968A (en) * 1940-10-22 1942-02-24 Westinghouse Air Brake Co Pneumatic horn

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1730425A (en) * 1929-10-08 Acoustic device
US1281877A (en) * 1913-08-19 1918-10-15 Etienne Teste Automobile-horn.
US1757459A (en) * 1923-05-02 1930-05-06 Western Electric Co Sound-translating system
US1663648A (en) * 1927-10-04 1928-03-27 Cooper Clark Whistle
US2161995A (en) * 1935-07-22 1939-06-13 Arthur T Cahill Speaker and listening device
US2273968A (en) * 1940-10-22 1942-02-24 Westinghouse Air Brake Co Pneumatic horn

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2884892A (en) * 1954-12-01 1959-05-05 Nathan Mfg Corp Pneumatic sound producing device
US2918895A (en) * 1957-03-14 1959-12-29 Roy D Buell Fluid powered horn
US3429294A (en) * 1965-08-24 1969-02-25 Kockums Mekaniska Verkstads Ab Sound transmitter for gaseous operating fluid
US3420207A (en) * 1965-10-27 1969-01-07 Kockums Mekaniska Verkstads Ab Pneumatic diaphragm oscillators
US3710752A (en) * 1971-01-11 1973-01-16 Mercor Corp Locomotive warning horn

Also Published As

Publication number Publication date
GB610745A (en) 1948-10-20
NL71133C (nl) 1952-11-15
DK69476C (da) 1949-06-27
DE852967C (de) 1952-10-20
ES173354A1 (es) 1946-09-01
FR928843A (fr) 1947-12-09

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