Disciplined  Oscillators

and some Time & Frequency Stuff
© Brooke Clarke 2003 - 2007



21 Dec 2005 - changed all patent # links to stable format & removed any commas
Class numbers for Disciplined Oscillators
Patents
Patent numbers from a Motorola unit in a Systron Donner Model 1037-B counter

Class numbers for Disciplined Oscillators

Patents are categorized by class and sub class numbers, although I found the patents on this page through a round about method I have arranged them on this page with a major sort on class/sub class class numbers and a minor sort on patent number.
Work in Progress (26 Jan 2003)

331 Oscillators

Sub Class 1 Automatic Frequency Stabilization using a Phase or Frequency Sensing  Means

Sub Class 3 Molecular resonance stabilization

Sub Class 158
Search for 331/158 - 773 hits Jan 2003
158 Crystal Oscillators in General - 867 hits 15 Mar 2006

368 Horology:: Time Measuring Systems or Devices

Sub Class 46 Plrual Timepiece System or System Device (e.g., Primary or Secondary Clocks):

Search for 386/46 - 77 hits on 26 Jan 2003
Sub Class 386/156
Search for 368/156

968 Horology:

901 Producing Timing Pulses (Driving Circuits for Stepping Motors
Search for 968/901 - 77 hits Jan 2003
Subclass 490; Producing Preselected Time Intervals for use as Timing Standards
Search for 968/490 - 163 hits Jan 2003
Subclass 817; Pulse Technique in General H03K; Control, Synchronization, or Stabilization of Generators in General H03L) [G04G 3/00]

Patents

6590981 System and method for secure cryptographic communications July 8, 2003 Zyfer, Inc. (Anaheim, CA)
6532194 Method and apparatus for providing certified time March 11, 2003 368/10; 368/47; 705/67; 713/173; 713/178  Intel Corporation (Santa Clara, CA)
6343050 Analog clock driven by radio signals with automatic resetting means January 29, 2002 368/47; 368/71; 368/80; 368/82; 368/187 Moneray International Ltd.
6288979 Solar-driven eternity clock September 11, 2001 Moneray International Ltd. (Kowloon, HK)
6269055 Radio-controlled clock movement July 31, 2001 Quartex, a division of Primex, Inc.
Calls U.S. Patent Documents
2118109 May., 1938 Roberts et al. 250/9.
4204398 May., 1980 Lemelson 36/47.
4316273 Feb., 1982 Jetter 368/47.
4645357 Feb., 1987 Allgaier et al. 368/187.
4650344 Mar., 1987 Allgaier et al. 368/47.
4860268 Aug., 1989 Allgaier et al. 368/47.
5077706 Dec., 1991 Ganter 368/47.
5089814 Feb., 1992 DeLuca et al. 368/21.
5144599 Sep., 1992 Blaich et al. 368/10.
5231612 Jul., 1993 Allgaier et al. 368/47.
5235563 Aug., 1993 Ganter et al. 368/47.
5253226 Oct., 1993 Ganter 368/47.
5270993 Dec., 1993 Besson et al. 368/80.
5297120 Mar., 1994 Yuzuki et al. 368/47.
5329501 Jul., 1994 Meister et al. 368/10.
5331608 Jul., 1994 Umemoto et al. 368/10.
5349570 Sep., 1994 Kaiser 368/47.
5363348 Nov., 1994 Damle 368/47.
5375018 Dec., 1994 Klausner et al. 368/47.
5408445 Apr., 1995 Allgaier et al. 368/47.
5422863 Jun., 1995 Minowa et al. 368/47.
5430693 Jul., 1995 Ganter et al. 368/47.
5444672 Aug., 1995 Kushita 368/47.
5528560 Jun., 1996 Ogiyama 368/47.
5671192 Sep., 1997 Schaffel 368/47.
6124764 Stable low-power oscillator
6011977 RF simulcasting system with dynamic wide-range automatic synchronization
5999493 Synchronization method and apparatus for isolated clock system December 7, 1999 SurVivaLink Corp
5805647 Method for detecting the beginning of time messages September 8, 1998 Temic Telefunken microelectronic GmbH
5757786 Time synchronization apparatus and a method thereof using a global positioning system of a satellite
5745656 Method for decoding transmitted information units April 28, 1998 Temic Telefunken microelectronic GmbH
5708394 Bridge-stabilized oscillator circuit and method, Karlquist; Richard K.,HP, Jan 13, 1998, 331/1R ; 331/116R; 331/139; 331/158; 331/177V; 331/183
5621771 Open loop switching frequency source utilizing closed loop stabilization
5574970 Paging system providing continvous synchronization of simulcast delay
5483665 Simulcast satellite paging system with over lapping paging reception locales
5422863 Automatically correcting electronic timepiece for selected signal receiving wireless receiver
5420831 Coho device for improving time measurement resolution
5363348  High resolution, remotely resettable time clock November 8, 1994
5280352 Circuit arrangement for time base transformation of a digital picture signal
5274545 Device and method for providing accurate time and/or frequency Dec 28, 1993 David Allan 368/156; 368/200; 368/202; 968/906; 968/907; 968/DIG1 HP Smart Clock?
Patents calling 5274545
6556512 Mobile terminal for a wireless telecommunication system with accurate real time generation
6141296 Time-of-day clock assembly
5978832 Time to completion determination in a multitasking workstation
5921938 System and method for adjusting time associated with medical event data
5805530 System, method, and device for automatic setting of clocks
5757786 Time synchronization apparatus and a method thereof using a global positioning system of a satellite
5717661 Method and apparatus for adjusting the accuracy of electronic timepieces
5640373 Secure time keeping peripheral device for use in low-power applications

U.S. Patent Documents
2786972 Mar., 1957 Dreier et al. 368/47.
3590573 Jul., 1971 Dietsch 368/47.
3811265 May., 1974 Cater 368/48.
3881310 May., 1975 Gerum et al. 368/47.
3974457 Aug., 1976 Bates et al. 331/43.
4020628 May., 1977 Vittoz 368/4.
4117661 Oct., 1978 Bryant, Jr. 368/47.
4187518 Feb., 1980 Martin et al. 368/47.
4254494 Mar., 1981 Maeda 368/200.
4282595 Aug., 1981 Lowdenslager et al. 368/200.
4290130 Sep., 1981 Lowdenslager et al. 368/200.
4315332 Feb., 1982 Sakami et al. 368/47.
4407589 Oct., 1983 Davidson et al. 368/200.
4440501 Apr., 1984 Schulz 368/47.
4448543 May., 1984 Vail 368/202.
4473303 Sep., 1984 Suzuki 368/202.
4501502 Feb., 1985 Van Orsdel 368/47.
4513259 Apr., 1985 Frekking 368/202.
4525685 Jun., 1985 Hesselberth et al. 368/47.
4575848 Mar., 1986 Moore et al. 371/61.
4582434 Apr., 1986 Plangger et al. 368/47.
4602375 Jul., 1986 Inukai 375/109.
4633421 Dec., 1986 Watson, Jr. et al. 364/569.
4633422 Dec., 1986 Brauer 364/569.
4708491 Nov., 1987 Luitje 368/200.
4768178 Aug., 1988 Conklin et al. 368/47.
4803708 Feb., 1989 Momose 364/200.
4899117 Feb., 1990 Vig 368/202.
4903251 Feb., 1990 Chapman 368/200.
4921467 May., 1990 Lax 368/200.
4993003 Feb., 1991 Fechner et al. 368/47.


Other References

"In Search of the Best Clock", M. A. Weiss, D. W. Allan and Trudi K. Pepp, Apr., 1989.
"An Ultra-Precise Time Synchronization System Designed by Computer Simulation", D. W. Allan, L. Fey, H. E. Machlan, and J. A. Barnes, Jan. 1986.
"A Study of the NBS Time Scale Algorithm", M. A. Weiss, D. W. Allan and Trudi K. Peppler, Apr. 1989.
"An Analysis of a Low Information Rate Time Control Unit", Lowell Fey, James A. Barnes, and David W. Allan, Apr. 1966.
"Time and Frequency (Time-Domain) Characterization, Estimation, and Prediction of Precision Clocks and Oscillators", David W. Allan, Nov. 1987.
"Control Of The Frequency And Phase Of An Atomic-Clock By An External Reference", Stein et al., International Conference on Frequency Control and Synthesis, University of Surrey, Guildford: Apr. 7-10, 1987.
5265070 Receiving device with timekeeping function
5237332 Receiver distortion correction circuit and method
5220333  Method and apparatus for determining universal coordinated time from Loran-C transmissions June 15, 1993 Austron Inc.
5146184 Atomic clock system with improved servo system Len Cutler Sep 8, 1992 331/3 ; 331/79
5128909 Advanced clock measurement system
5052026 Bit synchronizer for short duration burst communications
4993003 Apparatus for updating time-of-day information in a signal
4907172 Character generator with clocking circuitry
4823328 Radio signal controlled digital clock
6466517 Global travel clock
  6118320 Clock input circuit
 5930697 Heterodyne receiver with synchronous demodulation for receiving time signals
  5923618 Leap-second cure for 1999 GPS rollover problem
  5921938 System and method for adjusting time associated with medical event data
  5881022 Frequency shifing device and method for automatic clock adjustment
  5818851 Method for detecting the time messages in the faulty signal of a time-signal transmitter
  5805647 Method for detecting the beginning of time messages
  5596552 Circuit for resetting time of timer
  5469411 Method and apparatus for accurate time maintenance and display
  5448533  Method and apparatus for accurate time maintenance and display
  5297120 Radio wave-standardized electronic timepiece
  5289497 Broadcast synchronized communication system
6141296 Time-of-day clock assembly
5978832 Time to completion determination in a multitasking workstation
5921938 System and method for adjusting time associated with medical event data
5805530 System, method, and device for automatic setting of clocks
5757786 Time synchronization apparatus and a method thereof using a global positioning system of a satellite
5717661 Method and apparatus for adjusting the accuracy of electronic timepieces
5640373 Secure time keeping peripheral device for use in low-power applications
  5274545 Device and method for providing accurate time and/or frequency 368/156; 368/200; 368/202; 968/906; 968/907; 968/DIG1
 2786972 Commercial Power Frequency Cordless Synchronous CLock Mar., 1957 Dreier et al. 318/16; 318/85; 318/724; 368/47; 379/55.1; 968/510; 968/DIG1
 3590573 System for Synchronizing Timing Devices Jul., 1971 Dietsch 368/59; 318/127; 368/47; 368/187; 968/510; 968/512; 968/518; 968/DIG1
 3811265 Coded Time Indicating Transmission System May., 1974 Cater 368/48; 368/52; 968/927; 968/DIG1
 3881310 Clock Adapted to be Synchronized by Alternating Current in a Wireless Manner May., 1975 Gerum et al. 368/47; 368/52; 968/490; 968/510; 968/DIG1
5274545 Device and method for providing accurate time and/or frequency
5134638 Shift register connection between electrical circuits
4103250 Fast frequency hopping synthesizer
 3974457 Time and frequency control unit Aug., 1976 Bates et al.
331/1A; 327/160; 331/39; 331/41; 331/43; 331/175; 377/50; 377/54; 455/257
3560880 Crystal Oscillator with Automatic Compensation for Frequency Drift due to Aging Feb., 1971 Easton et al. 331/158; 331/175
2959742  Constand Frequency Source Nov 8, 1960 E. P. Flech 331/14; 331/26; 331/35; 331/165
3428916  Compensated Crystal Oscillators Feb 18, 1969 331/116R; 331/109; 331/176; 331/177V
 3662269 Remote Drift Rate Compensator for Frequency Standards May., 1972 Osborne et al. 455/71; 331/35; 331/175; 455/76; 455/119; 968/922; 968/DIG1
2658146 Servo System Nov 3 1953 331/30; 318/606; 331/2; 331/13; 331/36R; 334/28 - motor control oscillator frequency
3488605  Oscillator with Digital Counter Frequency Control Circuits Jan 6, 1970 331/17; 331/1A; 331/18; 331/36C; 331/175
3560880 Crystal Oscillator with Automatic Compensation for Frequency Drift due to Aging Feb., 1971 Easton et al. 331/158; 331/175
3569613  Color Subcarrier Oscillators May 9, 1971 RCA 348/507 -
 4020628 Automatic regulation of an electronic watch May., 1977 Vittoz 368/4.
 4117661 Precision automatic local time decoding apparatus Oct., 1978 Bryant, Jr. 368/47.
 4187518 Timing device Feb., 1980 Martin et al. 368/47.
 4254494 Accuracy correction in an electronic timepiece Mar., 1981 Maeda 368/200.
 4282595 Method for digital frequency trimming an oscillator in an electronic timepiece Aug., 1981 Lowdenslager et al. 368/200.
 4290130 Digital frequency trimmed electronic timepieceSep., 1981 Lowdenslager et al. 368/200.
 4315332 Electronic timepiece radio Feb., 1982 Sakami et al. 368/47.
 4407589 Error correction method and apparatus for electronic timepieces Oct., 1983 Davidson et al. 368/200.
 4440501 Method of automatic adjustment of self-contained radio-clock by means of time mark Apr., 1984 Schulz 368/47.
 4448543 Time-of-day clock having a temperature compensated low power frequency source  May., 1984 Vail 368/202.
 4473303 Electronic timepiece  Sep., 1984 Suzuki 368/202.
 4501502 Apparatus and method for timekeeping and time correction for analog timepiece  Feb., 1985 Van Orsdel 368/47.
 4513259 Closed loop temperature compensated frequency reference  Apr., 1985 Frekking 368/202.
 4525685 Disciplined oscillator system with frequency control and accumulated time control Jun., 1985 Hesselberth et al. 368/47.
 4575848 Methods and apparatus for correcting a software clock from an accurate clock Mar., 1986 Moore et al. 371/61.
6205091 Method and apparatus for controlling a solar-powered radio-controlled timepiece when a storage element is inadequately charged
6128337 Multipath signal discrimination
6069850 Method and apparatus for driving a battery-backed up clock while a system is powered-down
5970400 Adjusting the timing and synchronization of a radio's oscillator with a signal from an SATPS satellite
5940458 Method and compensating for time error of time/frequency generator using global positioning system
5921938 System and method for adjusting time associated with medical event data
5901115 Analog radio clock with time zone conversion
5899957 Carrier phase differential GPS corrections network
5881022 Frequency shifing device and method for automatic clock adjustment
5757786 Time synchronization apparatus and a method thereof using a global positioning system of a satellite
5657297 Clock apparatus having high accuracy
5621703 Radio wave-corrected timepiece
5596552 Circuit for resetting time of timer
5557585 Broadcast signal receiver which automatically sets an internal clock
5469411 Method and apparatus for accurate time maintenance and display
5448533 Method and apparatus for accurate time maintenance and display
5440313 GPS synchronized frequency/time source
5422863 Automatically correcting electronic timepiece for selected signal receiving wireless receiver
5375018 Location acquisition and time adjusting system
5367572 Method and apparatus for personal identification
5329500 Video cassette recorder having automatic time setting function
5297120 Radio wave-standardized electronic timepiece 368/47
5274545 Device and method for providing accurate time and/or frequency
5265070 Receiving device with timekeeping function
5237614 Integrated network security system
5168520 Method and apparatus for personal identification
5138707 Method of operating a timer in a digital data processing system
4823328 Radio signal controlled digital clock
4768178 High precision radio signal controlled continuously updated digital clock 368/47; 375/356; 968/907; 968/922; 968/DIG1 Precision Standard Time Model 1020
4933920 Sidereal clock 368/15; 368/155; 368/184; 368/200; 968/902; 968/938; 968/DIG1 - switches between 50  and 60 Hz to get sidereal time
4920365 Electronic digital timepiece having a separate key for controlling the switching of the display from standard to daylight savings time
4899117 High accuracy frequency standard and clock system 331/3; 331/44; 331/47; 331/176; 368/56; 368/202
A high accuracy atomic frequency standard and clock which utilizes a micrmputer (sic). The microcomputer compensates for aging and temperature variations in the atomic standard and its slave crystal oscillator and generates an error signal which is used to either correct the frequency of the slave crystal oscillator or to adjust the number of clock pulses per unit time interval. No C-field adjustment is employed.  A reference standard is connected to an atomic standard and the error signal is used by a microcontroller to adjust the output frequency of a crystal oscillator that is locked to the atomic atnadard.  This avoids the problem of having a Rb standard which after about 7.5 years has drifted outside the range where it can be brought back on frequency.
4476445
4885778 Method and apparatus for synchronizing generation of separate, free running, time dependent equipment 
4582434 Time corrected, continuously updated clock Apr., 1986 Heath Company (St. Joseph, MI) Plangger et al. 368/46; 368/47; 968/907; 968/922; 968/DIG1
3530663 Automatic and Continuous Time Adjusting Device for a Clock Sep., 1970 Marti.  368/184; 331/105; 331/172; 368/47; 714/814; 968/907; 968/922; 968/DIG1
 4117661 Precision automatic local time decoding apparatus Oct., 1978 Bryant, Jr. 368/47.
 4234958 Radio synchronized time-keeping apparatus and method Nov., 1980 Pipes et al. 375/356; 368/47; 375/371; 968/922; 968/DIG1
  4440501 Method of automatic adjustment of self-contained radio-clock by means of time mark Apr., 1984 Schulz 368/47.


 4602375 Jul., 1986 Inukai 375/109.
 4633421 Dec., 1986 Watson, Jr. et al. 364/569.
 4633422 Dec., 1986 Brauer 364/569.
 4708491 Nov., 1987 Luitje 368/200.
 4768178 Aug., 1988 Conklin et al. 368/47.
 4803708 Feb., 1989 Momose 364/200.
 4899117 Feb., 1990 Vig 368/202.
 4903251 Feb., 1990 Chapman 368/200.
 4921467 May., 1990 Lax 368/200.
 4993003 Feb., 1991 Fechner et al. 368/47.

  4823328 Radio signal controlled digital clock
4768178 High precision radio signal controlled continuously updated digital clock 368/47; 375/356; 968/907; 968/922; 968/DIG1
4117661 Precision automatic local time decoding apparatusOct., 1978 Bryant, Jr. 368/47; 340/825.26; 375/355; 455/502; 968/924; 968/DIG1
 4440501 Method of automatic adjustment of self-contained radio-clock by means of time mark Apr., 1984 Schulz 368/47; 368/202; 968/907; 968/922; 968/DIG1
 4525685 Disciplined oscillator system with frequency control and accumulated time control Jun., 1985 Hesselberth et al. 331/10; 331/11; 331/18; 331/25; 331/64; 368/47; 375/362
 4556988 Indoor unit of receiver for broadcasting satellite Dec., 1985 Yoshisato 455/182.2; 455/183.1; 455/192.2; 455/208; 455/260; 455/302
 4582434 Time corrected, continuously updated clock Apr., 1986 Plangger et al. 368/46; 368/47; 968/907; 968/922; 968/DIG1
4650344 Radio controlled timepiece
4633422 Apparatus for and method of compensating for variations due to aging
4586005 Enhanced analog phase interpolation for Fractional-N frequency synthesis

4525685 Disciplined oscillator system with frequency control and accumulated time control June 25, 1985 331/10; 331/11; 331/18; 331/25; 331/64; 368/47; 375/362 - although this is a WWVB patent it's called out in the Spectracom 8195 data sheet.  spec 1E-10 GPS disciplined xtal oscillator

3731210 May., 1973 Mollod 331/10.
3890619 Jun., 1975 Mounce 343/385.
4499433 Autolock for resonators for frequency standards Feb 12, 1985 Class 331/3; 331/94.1
4105946 Aug., 1978 Ikeda 331/10.
4160183  Oscillator having a quartz resonator cut to compensate for static and dynamic thermal transients
4161734 Jul., 1979 Anderson  343/450.
4184122 Jan., 1980 Clark et al. 328/133.
4215308 Jul., 1980 Kusters 324/78.
4264967 Apr., 1981 Fujita et al. 368/156.
4303893 Dec., 1981 Goldberg 331/1.
4305041 Dec., 1981 Frerking 328/155.
4305045 Dec., 1981 Metz et al. 331/25.
4318063 Crystal oscillator compensated for g-sensitivity 331/158; 331/116R
4313217  Jan., 1982 Beuscher 455/226.

4358742 Transimpedance oscillator having high gain amplifier Nov 9, 1982, Singer, 331/158 ; 331/108D
4283691 Crystal oscillator having low noise signal extraction circuit,  Aug 11, 1981, Burgoon; John R.,HP, 331/116R ; 331/158 (HP 10811)
4079280  Quartz resonator cut to compensate for static and dynamic thermal transients, Kusters; John A.,HP,   March 14, 1978,  310/318; 310/361; 331/37; 331/60; 331/69; 331/158; 331/176

Patent numbers from a Motorola unit in a Systron Donner Model 1037-B counter

Based on the following patents this may be an ovenized crystal oscillator that outputs a frequency that's an integer multiple of the crystal oscillation frequency.

Class 219 Electric Heating
     200 Heating Devices / 209 Electrical Devices / -210 Crystal or other vibratory device
    / 482 With power supply and voltage or current regulation or current control means490 Automatic regulating or control means/-503 Inductive reactor means (e.g., auto transformer)

Class 310 Electrical Generator or Motor Structure
    311 Piezoelectric elements and devices / 341 With temperature modifier and/or gas or vapor atmosphere control/-343 With heating element
    311 Piezoelectric elements and devices / 348 With mounting or support means / 351 Suspended by thin member / -353 Contact at edges only

Class 327 Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems
    113 Frequency or repetition rate conversion or control / 117 Frequency division / -118 Having discrete active device (e.g., transistor, triode, etc.)
    -129 Generating sinusoidal output

Class 331 Oscillators
    18 With reference oscillator or source / -19 Spectrum reference source
    50 Cascade or tandem connected / -51 Frequency dividers
    50 Cascade or tandem connected / -52 Semiconductor (e.g., transistor)
    50 Cascade or tandem connected / -53 Frequency multiplier
    68 with Outer Casing or Housing /-69 With temperature modifier
    107R Solid State Active Element Oscillator / 108R Transistors / 111 Relaxation oscillator / 113R Multivibrator type
            "-116R Electromechanical resonator controlled  
            "-117R L-C type
    -172 with Synchronizing, Trigering or Pulsing Circuits
       "/ -173 Triggering or pulsing (e.g., burst generators)
    -177R with Frequency Adjusting Means

Class 334 Tuners
     11 Tuner Unit Directly Responsive to Voltage and/or Current Varation / 14 Reactance tuning / -15 Semiconductor reactance circuit

3217270 Frequency Changer with Sync Input and Sync Potential Controls Nov 9, 1965, Motorola  331/173; 331/51; 331/52; 331/53; 331/113R; 331/117R; 331/172
3252109 Crystal Oscillator and Oven Assembly, May 17, 1966, Motorola  331/69; 219/210; 310/343
3322982 Temperature Control Oven, May 30, 1967, Motorola  310/343; 219/210; 219/503; 331/19; 331/69 - adjustable thermal path between thermistor and case to allow matching heater to case path in order to minimize the effect of ambient temp changes. i.e. on the same isothermal line.
3333122 Electrical Device, July 25, 1967, Motorola  310/353 - Crystal mounting method
3478225 Frequency Dividing System Including Transistor Oscillator Energized by Pulses Derived from Wave to be Divided, Nov 11, 1969, Motorola  327/118; 327/129; 331/117R; 331/173
3503011 Voltage Controlled Tuning, March 24, 1970, Motorola  331/177V; 331/116R; 334/15

Michael Fischer Palo Alto (HP)
Class 327 - Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems
    -1 Specific Signal Discriminating (e.g., Comparing, Selecting, etc.) without subsequent control
            -2 Phase

6351153  Phase detector with high precision  Feb 26, 2002 327/2; 327/3; 327/10; 327/12 - improvement on the HP K34-59991A Linear Phase Comparator
5723989 Phase-measurement device  March 3, 1998 327/3; 327/2

2410156 Electronic Timing Device, Oct 29, 1946, 368/58; 327/118; 340/332; 968/564; 968/946; 968/DIG.1- Interesting Vacuum Tube Clock Counter patent - References to using Binary arithmetic and to using feedback to change the scale of the counter.

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