GB611738A - Improvements in piezo-electric crystal vibrators - Google Patents

Improvements in piezo-electric crystal vibrators

Info

Publication number
GB611738A
GB611738A GB3441645A GB3441645A GB611738A GB 611738 A GB611738 A GB 611738A GB 3441645 A GB3441645 A GB 3441645A GB 3441645 A GB3441645 A GB 3441645A GB 611738 A GB611738 A GB 611738A
Authority
GB
United Kingdom
Prior art keywords
adhesive
plate
plates
wires
grid
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
GB3441645A
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.)
BENJAMIN SPALDING SMITH
ERIC WIGLEY PRATT
Original Assignee
BENJAMIN SPALDING SMITH
ERIC WIGLEY PRATT
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 BENJAMIN SPALDING SMITH, ERIC WIGLEY PRATT filed Critical BENJAMIN SPALDING SMITH
Priority to GB3441645A priority Critical patent/GB611738A/en
Publication of GB611738A publication Critical patent/GB611738A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/02Details
    • H03H9/05Holders; Supports
    • H03H9/10Mounting in enclosures
    • H03H9/1007Mounting in enclosures for bulk acoustic wave [BAW] devices
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/02Details
    • H03H9/02007Details of bulk acoustic wave devices
    • H03H9/02086Means for compensation or elimination of undesirable effects
    • H03H9/02094Means for compensation or elimination of undesirable effects of adherence
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46Filters
    • H03H9/54Filters comprising resonators of piezoelectric or electrostrictive material
    • H03H9/58Multiple crystal filters

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

611,738. Compound sheet materials. SMITH, B. S., PRATT, E. W., and WRIGHT, C. S. Dec. 19, 1945, No. 34416. [Class 140] [Also in Groups XXXIX and XL(c)] In a piezo-electric crystal vibrator consisting of crystal plates s adhesively secured between metal plates, each adhesive joint embodies a grid of soft metal wires or other filaments so as to ensure a predetermined thickness of the adhesive layer when the parts are pressed together. The invention is described as applied to a sub-aqueous compressional wave sender and receiver as in Specification 611,739, [Group XL(c)], in which it is required to stick quartz plates to a steel plate b<1>. The parts are cleaned with methylated spirit and while heated are coated with a solution of a polyvinyl acetal resin in methylated spirit. A ring plate i carrying a grid j of fine copper wires or plastic filaments is laid on the adhesive coating, and the whole is heated to drive off the solvent and to bind the adhesive to the steel. When the plate has cooled the ring i is forced downwards to break off the wires at the outer edge of the plate b<1>. A desired pattern of quartz plates is arranged on the plate b<1> by means of a template which is then removed. Another face plate is similarly prepared, and an interplate is prepared by coating both faces with adhesive and a grid of wires. The two face plates are then applied to the opposite faces of the interplate and the whole is heated to about 160‹C with about 1 ton pressure and allowed to cool with full pressure maintained. This gives a constant thickness layer of adhesive in the finished unit, being slightly less than the original diameter of the wire as this is somewhat flattened in the process.
GB3441645A 1945-12-19 1945-12-19 Improvements in piezo-electric crystal vibrators Expired GB611738A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3441645A GB611738A (en) 1945-12-19 1945-12-19 Improvements in piezo-electric crystal vibrators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3441645A GB611738A (en) 1945-12-19 1945-12-19 Improvements in piezo-electric crystal vibrators

Publications (1)

Publication Number Publication Date
GB611738A true GB611738A (en) 1948-11-03

Family

ID=10365372

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3441645A Expired GB611738A (en) 1945-12-19 1945-12-19 Improvements in piezo-electric crystal vibrators

Country Status (1)

Country Link
GB (1) GB611738A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8779326B2 (en) 2006-11-08 2014-07-15 Tel Solar Ag Method and apparatus for laser beam alignment for solar panel scribing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8779326B2 (en) 2006-11-08 2014-07-15 Tel Solar Ag Method and apparatus for laser beam alignment for solar panel scribing

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