US1882989A - Thermostatically controlled piezo-crystal - Google Patents

Thermostatically controlled piezo-crystal Download PDF

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Publication number
US1882989A
US1882989A US501537A US50153730A US1882989A US 1882989 A US1882989 A US 1882989A US 501537 A US501537 A US 501537A US 50153730 A US50153730 A US 50153730A US 1882989 A US1882989 A US 1882989A
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US
United States
Prior art keywords
chamber
crystal
temperature
frequency
chambers
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
US501537A
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English (en)
Inventor
Schumacher 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.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
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 claimed from DEL77050D external-priority patent/DE516554C/de
Application filed by Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
Application granted granted Critical
Publication of US1882989A publication Critical patent/US1882989A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
    • H03B5/34—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being vacuum tube
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
    • H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
    • H03L1/04—Constructional details for maintaining temperature constant

Definitions

  • a suitable form for one of the proposed means may be ⁇ obtained only by the present invention, in which a plurality of chambers are arranged one within the other, While the quartz crystal is placed within the innermost chamber.
  • an outer case 1 which may consist of sheet metal or Wood having a refractory lining, is provided a metal box 2, containing again another metal box 8.
  • rl ⁇ he quartz crystal is mounted in box 4l.
  • the temperatures to be maintained in the individual cases are controlled automatically by means of devices, Which are sensitive to changes of tem perature, preferably mercury thermometers ⁇ with fused-in contacts.
  • the temperature of the atmosphere surrounding the piece of quartz Q mounted in the box 4 is gauged by means of the thermometer T1.
  • the contact leads of the said thermometer are passed outside of the said arrangement by way of a blocking circuit S1. Outside of the total arrangement are provided some relays and sources of electric current (not shown) by means of which the heating coil H, in the space containing the piece of quartz is heated.
  • a blocking circuit S2 In these leads is again interposed a blocking circuit S2.
  • the leads 5 and (i connected to the quartz crystals pass to the grid circuit of the tube R, the oscillations of which are kept constant by the said quartz crystal.
  • the chamber 3 containingr both the chamber l Wit-h the piece of quartz and the tube. R with its oscillatory circuits, is n'iaintaiued at a constant temperature ⁇ with the aid of the thermometer T2.
  • Theleads from the contacts of the thermometer are again passed .to the outside by Way of a blocking circuit S3', While the heating coil H2 is provided for the maintenance of the temperature constant.
  • said heating coil however, is not arranged Within the chamber 3 in a ivay similar to that of the chamber containing the quartz crystal, hut outside of the chamber Q between the chamber l provided with heat insulation and the metal chamber Q.
  • The. leads for supplying current to the tube are passed over the filter arrangement S1, which will prevent any flou' of high frequency current by way of the leads supplying the grid, heating devices and anodes.
  • thermometers The adjustment of the thermometers is .such that b v means of the contact thermometer 'll an adjusted temperature is kept constant within a margin of :L -0.1 degreesl ccu'igi'adc.
  • thermometer 'l2 of the box 3, containing both the case with the piece of quartz and the tube with its tuning means is maintained at a predetermined temperature to an accuracy of il degree centigrade.
  • the condenser C being an adjustable condenser of high capacity, is provided With strong plates, good insulation and fine adjustment, so that in this way changes of the frequency are also avoided.
  • controlling relays It may of course appear to be simpler to mount the controlling relays directly Within the box, but it must be considered, that reare adjusted and they must lays of that class be accessible to continuous control. If these controlling relays be arranged Within the box however, control thereof is'only possible by opening the whole arrangement as represented. If these relays however are arranged outside, adjustment can be Iliade at Once in a simple manner, without the necessity of dismantling the Whole apparatus. In order to do. this, however, it ⁇ is necessary to cut in the filter circuits, as described. Furthermore it is naturally of advantage to screen oif all leads against the action of high frequency currents in well known Ways, in order to prevent the entrance of any high frequency oscillations.
  • the next circuit coupled to the coil L may be of such dimension that the resulting grid control potential is only a small portion of that necessary to keep the tube of the next amplifying step Within the negative range of its characteristic curve. By this means reactions due to changes of load are avoided in an effective manner. By means of this arrangement constancy of the frequency can be obtained, which is equivalent to that of broadcasting on equal Wave lengths when using a fundamental transmitted frequency, as used at the present time.
  • a temperature control system the combination of a plurality of chambers one Within the other, a source of oscillations, a piezo-electric crystal disposed in the innermost chamber for controlling said source of oscillations, said oscillator' and its associated circuits being disposed in the next outer chamber, and means in each of said chambers for approximately maintaining a predetermined temperature therein, the actual temperature in each of said chambers differing from said predetermined temperature by a smaller amount until the innermost chamber is reached at Which point the temperature becomes substantially constant.
  • a temperature control system the combination of a plurality of chambers one Within the other, a source of oscillations, means disposed in the innermost chamber for controlling said source of oscillations, said oscillator and its associated circuits being disposed inthe next outer chamber, and thermostats in each of said chambers for approximately maintaining a predetermined temperature therein, the actual temperature in each of said chambers being such that the temperature of the outermost chamber differs most from the predetermined temperature, the temperature of the succeeding inner chambers differing progressively less from the predetermined temperature, the temperature of the innermost chamber remaining substantially equal to said predetermined temperature.
  • a temperature control system the combination of a plurality of chambers one within the other, an oscillating vacuum tube, a piezo-electric crystal disposed in the innermost chamber for controlling the oscillations of said tube, said tube and its associated circuits being disposed in the next outer chamber, thermostatically controlled means in each of said chambers for approximately maintaining a predetermined temperature therein, the actual temperature in each of said chambers differing from said predetermined temperature by a progressively smaller amount until the innermost chamber is reached, the temperature therein being maintained substantially constant.

Landscapes

  • Crystals, And After-Treatments Of Crystals (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
US501537A 1929-12-18 1930-12-11 Thermostatically controlled piezo-crystal Expired - Lifetime US1882989A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL77050D DE516554C (de) 1929-12-18 1929-12-18 Einrichtung zur Frequenzkonstanthaltung von durch Piezokristalle gesteuerten Roehrensendern

Publications (1)

Publication Number Publication Date
US1882989A true US1882989A (en) 1932-10-18

Family

ID=7284103

Family Applications (1)

Application Number Title Priority Date Filing Date
US501537A Expired - Lifetime US1882989A (en) 1929-12-18 1930-12-11 Thermostatically controlled piezo-crystal

Country Status (4)

Country Link
US (1) US1882989A (enrdf_load_stackoverflow)
AT (1) AT125430B (enrdf_load_stackoverflow)
FR (1) FR707865A (enrdf_load_stackoverflow)
GB (1) GB356042A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731564A (en) * 1951-11-05 1956-01-17 Edelstein Harold Barium titanate temperature control
US2970226A (en) * 1956-11-20 1961-01-31 Texas Instruments Inc Electronic timing device
US3007023A (en) * 1958-03-05 1961-10-31 Amphenol Borg Electronics Corp Temperature control device for a frequency standard generator
US3013104A (en) * 1957-07-18 1961-12-12 Video Instr Company Inc Heat bank for transistorized circuits
US20090145559A1 (en) * 2004-11-19 2009-06-11 Webasto Ag Roller blind system for a motor vehicle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2170930B (en) * 1985-02-07 1988-10-05 Sherritt Gordon Mines Ltd Quadrupole mass spectrometers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731564A (en) * 1951-11-05 1956-01-17 Edelstein Harold Barium titanate temperature control
US2970226A (en) * 1956-11-20 1961-01-31 Texas Instruments Inc Electronic timing device
US3013104A (en) * 1957-07-18 1961-12-12 Video Instr Company Inc Heat bank for transistorized circuits
US3007023A (en) * 1958-03-05 1961-10-31 Amphenol Borg Electronics Corp Temperature control device for a frequency standard generator
US20090145559A1 (en) * 2004-11-19 2009-06-11 Webasto Ag Roller blind system for a motor vehicle

Also Published As

Publication number Publication date
GB356042A (enrdf_load_stackoverflow) 1931-09-03
FR707865A (fr) 1931-07-16
AT125430B (de) 1931-11-10

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