US2405181A - Frequency determining unit - Google Patents

Frequency determining unit Download PDF

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Publication number
US2405181A
US2405181A US551984A US55198444A US2405181A US 2405181 A US2405181 A US 2405181A US 551984 A US551984 A US 551984A US 55198444 A US55198444 A US 55198444A US 2405181 A US2405181 A US 2405181A
Authority
US
United States
Prior art keywords
socket
contact
housing
opposite
determining unit
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
US551984A
Other languages
English (en)
Inventor
Bokovoy Samuel Alexander
Stuntz Hans
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.)
STC PLC
Federal Telephone and Radio Corp
Original Assignee
Standard Telephone and Cables PLC
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
Priority to BE473656D priority Critical patent/BE473656A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to US551984A priority patent/US2405181A/en
Application granted granted Critical
Publication of US2405181A publication Critical patent/US2405181A/en
Priority to ES0178453A priority patent/ES178453A1/es
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
    • H03H9/10—Mounting in enclosures
    • H03H9/1007—Mounting in enclosures for bulk acoustic wave [BAW] devices
    • H03H9/1014—Mounting in enclosures for bulk acoustic wave [BAW] devices the enclosure being defined by a frame built on a substrate and a cap, the frame having no mechanical contact with the BAW device
    • H03H9/1028—Mounting in enclosures for bulk acoustic wave [BAW] devices the enclosure being defined by a frame built on a substrate and a cap, the frame having no mechanical contact with the BAW device the BAW device being held between spring terminals

Definitions

  • Fhis invention relates to oscillator or resonator units for crystal controlled oscillator circuits. It consists of an improved and simplified structural arrangement specially designed to reduce the number of parts to a minimum. As a result there is substantial economy in costs and labor in production, including reduced tooling, stocking of parts and fewer operations in assembling. It further ofiers material advantages over constructions as heretofore employed particularly with respect to the total elimination of welding or soldering required in the making of a holder unit having rigidly secured terminals and contact members. Thereby there is avoided all danger of detrimental efiect incident to loose solder or flux acid influence on the contacts and contained parts.
  • the improved features and structure are such as to be particularly well adapted for incorporation in the end or top loading, plug-in terminal types of resonator units wherein a maximum of compactness is desirable. Its features are further specially adapted for units of the type having generally rectangular sockets for the insert elements and wherein provision is made for electrical contact at diagonally opposite corners of the socket, an arrangement suitable to many desirable types of crystal mounting.
  • Fig. 1 is a view in side elevation of the improved oscillator unit
  • Fig. 2 is a plan view thereof with the cover removed;
  • Fig. 3 is a central, longitudinal vertical section of the housing, crystal and contact assembly forming the resonator unit;
  • Fig. 4 is a cross sectional view at right angles thereto;
  • Fig. 5 is a longitudinal sectional view of the cover member
  • Fig. 6 is a perspective view of the improved combined terminal pin and contact.
  • the housing or holder for the crystal element and the contacts and mounting parts is formed of molded insulating material consisting of an inclosing body or base portion 1 formed with a top opening, rectangular socket 2 for the insert parts and to which is attached,
  • the socket 2 formed in the body member I is of rectangular cross sectional contour having its side and end walls parallel to the similarly contoured external surface of the body portion and has its bottom wall formed with symmetrically disposed transversely extending bosses 8 to provide for a limited area supporting contact with the insert elements.
  • the dimensions of the socket are such as to receive the usual insert elements composed of the crystal 9 and cooperating oppositely positioned, electrodes It which are of rectangular plate formation and of a relative size to be received by the socket in a manner to insure of positioning in proper cooperative relation for attaining the desired resonant action.
  • the width of the socket is likewise such as to permit of the reception of the coil spring I I having the turns thereof at its opposite extremities enlarged to be of a, diameter substantially corresponding to the longitudinal dimension of the socket portion with the required tolerance for its reception.
  • the improved contact arrangement in accordance with the present invention provides for a greatly simplified and advantageous structure wherein the usual plug-in type of terminal pins and the contacts or contact plates associated with the respective pins are integrally formed for rigid assembling with the housing by uniting therewith in the molding operation.
  • the production is simplified to a material degree, accurate alignment is readily obtained and also rigidly retained in the assembly.
  • objectionable factors as presented by welded and soldered assemblies of pins and contacts as heretofore employed, are eliminated.
  • the terminal pins l2 having the usual rounded extremities for plug-in electrical connection, are formed at their inner portions with deformations or bonding ribs I 3 for mechanical bonding with the molded housing and have integrally formed therewith the inwardly or upwardly extended contact plates Id.
  • the contact extension is desirably of flattened or plate formation, extending parallel to the axis of the pin, and has its upper extremity beveled or tapered at its inner side.
  • the contact plate extensions of the respective pins are oppositely positioned and partially embedded in the side walls of the housing so as to occupy diagonally opposite corner positions in the rectangular socket with inward exposure of the contact surfaces.
  • the housing is formed with complementary vertical bearing ribs or shoulders i5 similarly projected within the socket at the other of the diagonally opposite corners thereof. These shoulders are likewise formed with tapered upper portions for inward deflection of the insert elements and provide, with the contact extensions, symmetrically disposed bearing shoulders or surfaces for engagement by the insert elements.
  • the insert elements comprising the resonator or crystal, the electrode plates on each side thereof and the spring are assembled as indicated.
  • the cover member is formed on its under or inner side with integrally transverse ribs !6 operative in a manner similar to that of the housing ribs 8 to provide limited area contact with the insert elements for reduction in damping of the desired vibrations.
  • a frequency determining unit of the character described comprising a housing member provided with a socket for th reception of a resonator element, said housing being of molded insulating material and having integral, combined terminal pin and contact plate elements molded therein and having their contact portions extending within the socket, a crystal element and opposite electrodes associated therewith received within the socket with one electrode engaging one of the contact plates and a spring interposed to engage the opposite of said electrodes and the other of said contact plates for closing of the electrical circuit.
  • a frequency determining unit of the character described comprising a housing member provided with a rectangular socket for the reception of a resonator element, said housin being of molded insulating material and having integral, combined terminal pin and contact plate elements molded therein and having their contact portions vertically extending within diagonally opposite corner positions of the socket, a crystal element and opposite electrodes associated therewith received within the socket with one electrode engaging one of the contact plates and a coil spring interposed to engage the opposite of said electrodes and the other of said contact plates for closing of the electrical circuit.
  • a frequency determining unit of the character described comprising a housing member provided with a rectangular socket for the reception of a resonator lement, said housing being of molded insulating material and having integral, combined terminal pin and contact plate elements molded therein and having their contact portions extending within the socket at opposite sides thereof, a crystal element and opposite electrodes associated therewith received within the socket with one electrode engaging one of the contact plates and a coil spring interposed to engage the opposite of said electrodes and the other of said contact plates for closing of the electrical circuit and a cover member secured to the housing for the sealing of the socket.
  • a frequency determining unit of the character described comprising a housing member provided with a socket for the reception of a resonator element, said housing being of molded insulating material and having integral, combined terminal pin and contact plate elements molded therein and having their contact plates extending within the socket at diagonally opposite corners thereof, a crystal element and opposite electrodes associated therewith received within the socket with one electrode engaging one of the contact plates and a coil spring interposed to engage the opposite of said electrodes and the other of said contact plates for closing of the electrical circuit, said contact plates being positioned to project into the socket and said socket having inward shoulder projections diagonally opposite to the contact plates for symmetrical support of the insert parts.
  • a frequency determining unit of the character described comprising a housing member provided with a rectangular socket for the reception of a resonator element, said housing being of molded insulating material and having integral, combined terminal pin and contact plate elements molded therein and having their contact portions vertically extending within diagonally opposite corner positions of the socket, a crystal element and opposite electrodes associated therewith received Within the socket and electrically connected to the contact plates.
  • a frequency determining unit of the character described comprising a housing member procontact plates, said contact plates being positioned to project into the socket and said socket having inward shoulder projections diagonally opposite to the contact plates for symmetrical support of the insert parts.
  • a frequency determining unit of the character described comprising a housing member provided with a rectangular socket for the reception of a resonator element, said housing being of molded insulating material and having integral, combined terminal pin and contact plate elements molded therein and having their contact portions extending within the socket at opposite sides thereof, a crystal element and oppositeelectrodes associated therewith received within the socket and electrically connected with the contact plates, a cover member secured to the housing for the sealing of the socket and said contact plates being partially embedded in the side wall of the socket and having inwardly beveled extremities.

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
US551984A 1944-08-30 1944-08-30 Frequency determining unit Expired - Lifetime US2405181A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE473656D BE473656A (en, 2012) 1944-08-30
US551984A US2405181A (en) 1944-08-30 1944-08-30 Frequency determining unit
ES0178453A ES178453A1 (es) 1944-08-30 1947-06-14 Mejoras en aparatos determinadores de frecuencia

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US551984A US2405181A (en) 1944-08-30 1944-08-30 Frequency determining unit

Publications (1)

Publication Number Publication Date
US2405181A true US2405181A (en) 1946-08-06

Family

ID=24203477

Family Applications (1)

Application Number Title Priority Date Filing Date
US551984A Expired - Lifetime US2405181A (en) 1944-08-30 1944-08-30 Frequency determining unit

Country Status (3)

Country Link
US (1) US2405181A (en, 2012)
BE (1) BE473656A (en, 2012)
ES (1) ES178453A1 (en, 2012)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429826A (en) * 1945-07-12 1947-10-28 Walter E Kuenstler Crystal holder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429826A (en) * 1945-07-12 1947-10-28 Walter E Kuenstler Crystal holder

Also Published As

Publication number Publication date
BE473656A (en, 2012)
ES178453A1 (es) 1947-08-01

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