US2457145A - Mounting for piezoelectric crystals - Google Patents

Mounting for piezoelectric crystals Download PDF

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Publication number
US2457145A
US2457145A US639291A US63929146A US2457145A US 2457145 A US2457145 A US 2457145A US 639291 A US639291 A US 639291A US 63929146 A US63929146 A US 63929146A US 2457145 A US2457145 A US 2457145A
Authority
US
United States
Prior art keywords
crystal
mounting
piezoelectric crystals
base
plate
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
US639291A
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English (en)
Inventor
Gray Frank
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US2457145A publication Critical patent/US2457145A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/05—Holders or supports
    • H03H9/0504—Holders or supports for bulk acoustic wave devices
    • H03H9/0528—Holders or supports for bulk acoustic wave devices consisting of clips

Definitions

  • This invention relates to mountings for piezoelectric crystals; and has for its object to provide a mounting that is of simple manufacture while ensuring a secure grip upon the crystal and attaining the correct electrical conditions.
  • Fig. 1 is a front view of a crystal holder assembly in accordance with the present invention, the cover being sectioned in order to expose the elements.
  • Fig. 2 is a plan view thereof, the cover again being sectioned for the purpose stated;
  • Fig. 3, 4 and 5 are front view, side view and plan view respectively, on an enlarged scale, of the contact and supportingspring which appears in the earlier figures as the means carrying the crystal.
  • a base-plate I of insulating material has a closetting cover 2 also of insulating material.
  • a quartz crystal 3 Within the chamber defined by this base-plate I and cover 2, and mounted on the base-plate, is a quartz crystal 3.
  • This crystal 3 consists of a square lamina 4 with electrode coatings 5 on the central portions of its main faces.
  • the electrode coatings 5 are in electrical connection with respective terminals 6 in the form of plug-pins projecting from the under-side of the base-plate l.
  • the present invention is concerned with the mounting of the crystal and the connection of its electrodes to the terminals.
  • the quartz crystal 3 is gripped cornerwise between the two spring brackets 1 of which one is shown on an enlarged scale in Figs. 3, 4 and 5.
  • the spring brackets 1 are of L-shape with a fixing limb 8 and an upstanding limb 9,
  • the ilxing limb 8 lies flat on the top of the base-plate I against which it is clamped by means of a nut II! screwed onto the threaded shank I I which passes through a hole I2 in the xing limb 8 and which is integral with the plug-pin 6 forming the terminal.
  • a shake-proof washer I3 underlies the nut I0, and a rectangular stud I4 on the base-plate I fits into a corresponding rectangular recess I in the fixing limb 8 so that the spring bracket cannot turn about the shank I I.
  • the two brackets 1 when in place hav-e their upstanding limbs 9 in parallel at a distance apart appropriate to the dimensions of the crystal 3.
  • Each of the upright limbs 9 is formed near its top end with a V-shaped recess I6, the angle of the V being rather less than say 85.
  • a gripping pressure being exerted both along the diagonal between the two brackets and also across each corner by reason of the acuteangle of the V.
  • the crystal is rmly held against movement in any direction within the plane of the crystal, but the springs are made of a material thin and springy enough to allow the crystal to oscillate to any frequency.
  • Each bracket 1 is also formed with two Wings'trips I1 .which extend up on either side of the upright limb 9 parallel but at right angles thereto, being integrally connected with the upright limb 9 at thelower ends and having their free upper ends on a level with the recess I6.
  • the wings are bent inwards towards one another, and near their free-ends are formed with inward projections I: thus the two co-operating wings exert a gripping pressure depth-wise upon the quartz lamina 4 across its corner.
  • Each of the central electrode coatings 5 on the quartz crystal has two extensions I9 to adjacent corners of the lamina 4, so that however the crystal is inserted into its holder, still the two electrode coatings will make electrical connection, one with a wing I1 on one bracket 1 and the other with a wing on the other bracket.
  • wires 20 are taken from the brackets 1 to the appropriate one of the extensions I9 at the top and bottom of' the crystal, being soldered at their ends.
  • a mounting for a piezo-electric crystal in the form of a square lamina comprising two spring strips mounted parallel to one another and each having a free end provided with a V-shaped recess, said recesses being adjacent and facing one another, said recesses being shaped so that said V has an angle slightly less than one right angle for receiving opposite corners of the crystal and for exerting a gripping pressure transverse to the diagonal between said corners.
  • a mounting for a piezo-electric crystal a-ccording to claim l further comprising two pairsl of wings, one pair being mounted on each of said strips, the wings of each pair being arranged to grip the crystal depthwise at the said opposite corners.

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
US639291A 1945-01-23 1946-01-05 Mounting for piezoelectric crystals Expired - Lifetime US2457145A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1798/45A GB588452A (en) 1945-01-23 1945-01-23 Improvements in or relating to mountings for piezo electric crystals

Publications (1)

Publication Number Publication Date
US2457145A true US2457145A (en) 1948-12-28

Family

ID=9728195

Family Applications (1)

Application Number Title Priority Date Filing Date
US639291A Expired - Lifetime US2457145A (en) 1945-01-23 1946-01-05 Mounting for piezoelectric crystals

Country Status (4)

Country Link
US (1) US2457145A (en(2012))
BE (1) BE476120A (en(2012))
ES (1) ES178067A1 (en(2012))
GB (1) GB588452A (en(2012))

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2850651A (en) * 1954-03-02 1958-09-02 P R Hoffman Company Piezoelectric crystal support
US3849681A (en) * 1969-06-06 1974-11-19 Cts Corp Piezoelectric crystal units with malleable terminals and epoxy-filler sealant
US3857146A (en) * 1972-04-13 1974-12-31 Suisse Horlogerie Method of making a quartz bar resonator
US3980911A (en) * 1974-02-11 1976-09-14 Cts Corporation Support structure and housing for piezoelectric crystal
US6548940B1 (en) * 1998-07-02 2003-04-15 Murata Manufacturing Co., Ltd. Speaker

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0070417B1 (de) * 1981-07-02 1986-03-26 Schott Glaswerke Halterung für eine Schwingquarzscheibe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1965591A (en) * 1933-03-29 1934-07-10 Louis A Gebhard Piezo-electric crystal holder
GB508657A (en) * 1937-12-20 1939-07-04 British Thomson Houston Co Ltd Improvements in and relating to methods of supporting piezo-electric crystals
US2329497A (en) * 1942-04-01 1943-09-14 Rca Corp Art of mounting piezoelectric crystals
US2392429A (en) * 1944-03-28 1946-01-08 Bell Telephone Labor Inc Piezoelectric crystal apparatus
US2409838A (en) * 1945-02-13 1946-10-22 Gen Electric Crystal mounting

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1965591A (en) * 1933-03-29 1934-07-10 Louis A Gebhard Piezo-electric crystal holder
GB508657A (en) * 1937-12-20 1939-07-04 British Thomson Houston Co Ltd Improvements in and relating to methods of supporting piezo-electric crystals
US2329497A (en) * 1942-04-01 1943-09-14 Rca Corp Art of mounting piezoelectric crystals
US2392429A (en) * 1944-03-28 1946-01-08 Bell Telephone Labor Inc Piezoelectric crystal apparatus
US2409838A (en) * 1945-02-13 1946-10-22 Gen Electric Crystal mounting

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2850651A (en) * 1954-03-02 1958-09-02 P R Hoffman Company Piezoelectric crystal support
US3849681A (en) * 1969-06-06 1974-11-19 Cts Corp Piezoelectric crystal units with malleable terminals and epoxy-filler sealant
US3857146A (en) * 1972-04-13 1974-12-31 Suisse Horlogerie Method of making a quartz bar resonator
US3980911A (en) * 1974-02-11 1976-09-14 Cts Corporation Support structure and housing for piezoelectric crystal
US6548940B1 (en) * 1998-07-02 2003-04-15 Murata Manufacturing Co., Ltd. Speaker

Also Published As

Publication number Publication date
BE476120A (en(2012))
GB588452A (en) 1947-05-22
ES178067A1 (es) 1947-07-01

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