US3665482A - Tracking antenna with anti-backlash spring in gear train - Google Patents

Tracking antenna with anti-backlash spring in gear train Download PDF

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Publication number
US3665482A
US3665482A US122807A US3665482DA US3665482A US 3665482 A US3665482 A US 3665482A US 122807 A US122807 A US 122807A US 3665482D A US3665482D A US 3665482DA US 3665482 A US3665482 A US 3665482A
Authority
US
United States
Prior art keywords
aerial
differential
driven gear
installation
axis
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
US122807A
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English (en)
Inventor
Richard Cresswell
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co Ltd
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 Marconi Co Ltd filed Critical Marconi Co Ltd
Application granted granted Critical
Publication of US3665482A publication Critical patent/US3665482A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
    • H01Q3/08—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying two co-ordinates of the orientation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19623—Backlash take-up
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19628—Pressure distributing

Definitions

  • SHEET 1 BF 2 ANGLE AXIS WmZni wax/m $160M BY x 5111070 This invention relates to steerable aerial installations.
  • One of the most important examples of such an installation is that in which an aerial is required to track a target such as a satellite.
  • a satellite tracking aerial is required to track a target such as a satellite.
  • a satellite tracking aerial is required to track its target with great accuracy, a requirement which also applies to other steerable aerial installations.
  • a satellite tracking aerial is, as is well known, required to move in elevation and hour angle.
  • the driving gear for hour angle movement commonly comprises a bull gear carrying the so-called hour angle platform, i.e.
  • the reduction gear ratio between motor and pinion may be over 3,000 to l.
  • the present invention seeks to overcome the above mentioned difficulties by simple and relatively inexpensive means which shall be purely mechanical in nature and do not involve the cost of providing anumber of motors, specially arranged and fed to exert different ratios of torque for the mere purpose of taking up backlash or play.
  • a steerable aerial installation includes a driven gear from which the aerial is carried; a pair of driving gears engaging said driven gear to drive the same; a pair of high reduction ratio gearboxes each in the drive to one or other of said driving gears; a differential having driving means driven by a source of driving power and a pair of differentially related driven means each driving one or other of said gearboxes; and spring bias means arranged to provide substantially constant bias of the drive to one gearbox with relation to that to the other.
  • the differential is of the sun and planet gear wheel type and provides the drives to the gearboxes from the shafts of its sun wheels.
  • the spring bias means is a spring operatively connected between the cage member of the differential and one of the planet gear wheels of the differential.
  • FIG. I is a general schematic perspective view of one form of steerable serial installation in accordance with the present invention
  • FIG. 2 is a similar perspective view to a larger scale in more detail of the drive arrangement of FIG. 1.
  • l is an aerial reflector mounted on a platform 2.
  • This reflector is illuminated by a primary radio source indicated conventionally at R and carried by supports S.
  • the platform 2 is pivotally mounted about an elevation axis 3 in a U shaped bracket 4 on an hour angle platform 5.
  • the hour angle axis is indicated by the broken line so referenced.
  • the movement of the aerial reflector 1 about the elevation axle 3 is provided by a jack arrangement consisting of a screw 6 connected in trunnions 7 at one end to the platform 2, and a nut member 8 which is on the screw and is rotatable b means not shown.
  • the motor 10 drives via a belt 18 the cage member 19 of a differential 11 the sun or output gear wheels 20 of which drive through shafts 22 and bevel gears at 12 the two reduction gear boxes 13.
  • the differential planet wheels driving the sun wheels 20 are referenced 21.
  • a substantially constant torque spring 23 operatively connected between the cage member 19 and one of the planet gear wheels 21 is arranged to provide a substantial constant torque spring bias of the drive to one of the gearboxes 13 in relation to that of the other.
  • the gear boxes 13 are designed to provide a high reduction gear ratio (a practical although not limiting value being of the order of 3000 l) in the drive to the driven gear wheel 15 through the pinion gear wheels 14.
  • the directions of rotation of the shafts and gears is indicated by arrows.
  • a steerable aerial installation including a driven gear from which the aerial is carried; a pair of driving gears engaging said driven gear to drive the same; a pair of high reduction ratio gearboxes each in the drive to one or other of said driving gears; a differential having driving means driven by a source of driving power and a pair of differentially related driven means each driving one or other of said gearboxes, and spring bias means arranged to provide substantially constant bias of the drive to one gearbox with relation to that of the other.

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  • Toys (AREA)
  • Gear Transmission (AREA)
US122807A 1970-03-13 1971-03-10 Tracking antenna with anti-backlash spring in gear train Expired - Lifetime US3665482A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1207970 1970-03-13

Publications (1)

Publication Number Publication Date
US3665482A true US3665482A (en) 1972-05-23

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ID=9998054

Family Applications (1)

Application Number Title Priority Date Filing Date
US122807A Expired - Lifetime US3665482A (en) 1970-03-13 1971-03-10 Tracking antenna with anti-backlash spring in gear train

Country Status (3)

Country Link
US (1) US3665482A (ja)
JP (1) JPS5525525B1 (ja)
GB (1) GB1267117A (ja)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3947000A (en) * 1973-03-19 1976-03-30 Wavin B.V. Extruder drive
US4251819A (en) * 1978-07-24 1981-02-17 Ford Aerospace & Communications Corp. Variable support apparatus
US4305307A (en) * 1979-12-18 1981-12-15 The United States Of America As Represented By The Secretary Of The Air Force Anti-backlash gear drive
US4626864A (en) * 1984-03-12 1986-12-02 Polarmax Corporation Motorized antenna mount for satellite dish
US4691207A (en) * 1984-09-04 1987-09-01 Nissho Iwai American Corporation Antenna positioning apparatus
US4819002A (en) * 1985-10-02 1989-04-04 Societe Nationale D'etude Et De Construction De Moteurs D'aviation "S.N.E.C.M.A." Device for orienting and angularly positioning the axis of rotation of a rotatable load
US5085619A (en) * 1989-03-02 1992-02-04 Fanuc Ltd. Dual pinion anti-backlash tensioner for a robot
US5882158A (en) * 1996-05-31 1999-03-16 Deckel Maho Gmbh Drive assembly
US6002376A (en) * 1997-05-02 1999-12-14 Nec Corporation Antenna driving apparatus
US8512199B2 (en) 2010-07-26 2013-08-20 Rethink Robotics, Inc. Minimizing backlash utilizing series elastic elements
US8686680B2 (en) 2011-06-13 2014-04-01 Rethink Robotics, Inc. Dual-motor series elastic actuator
US20140190321A1 (en) * 2013-01-09 2014-07-10 Illinois Tool Works Inc. Pipe machining apparatuses and methods of operating the same
WO2014134688A1 (en) * 2013-03-08 2014-09-12 Commonwealth Scientific And Industrial Research Organisation Anti backlash gearbox and system
US20160173665A1 (en) * 2013-05-31 2016-06-16 Kathrein-Werke Kg Modular adjusting device, in particular for rf devices
US9399306B2 (en) 2013-01-09 2016-07-26 Illinois Tool Works Inc. Pipe machining apparatuses and methods of operating the same
US9409298B2 (en) 2012-04-13 2016-08-09 Rethink Robotics, Inc. Flexure elements for series elastic actuators and related methods
US9732990B2 (en) 2013-09-23 2017-08-15 Esolar Inc. Biased drive assemblies for heliostats
US10029320B2 (en) 2013-01-09 2018-07-24 Illinois Tool Works Inc. Pipe machining apparatuses and methods of operating the same
US10328493B2 (en) 2013-01-09 2019-06-25 Illinois Tool Works Inc. Pipe machining apparatuses and methods of operating the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2536591B1 (fr) * 1982-11-23 1985-09-20 Thomson Brandt Support d'antenne de telecommunications par satellite geostationnaire et ensemble forme par un tel support et son antenne
FR2671885B1 (fr) * 1991-01-17 1996-11-22 Pierre Robert Dispositif d'orientation et d'ajustement, selon au moins l'une des trois directions de l'espace, de la position d'une piece notamment d'une antenne d'emission ou de reception d'ondes electromagnetiques.
KR940007715B1 (ko) * 1992-01-06 1994-08-24 삼성전자 주식회사 360˚감지가 가능한 센서 회전장치

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3396594A (en) * 1966-02-25 1968-08-13 Designartronics Inc Anti-backlash means for gear trains

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3396594A (en) * 1966-02-25 1968-08-13 Designartronics Inc Anti-backlash means for gear trains

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3947000A (en) * 1973-03-19 1976-03-30 Wavin B.V. Extruder drive
US4251819A (en) * 1978-07-24 1981-02-17 Ford Aerospace & Communications Corp. Variable support apparatus
US4305307A (en) * 1979-12-18 1981-12-15 The United States Of America As Represented By The Secretary Of The Air Force Anti-backlash gear drive
US4626864A (en) * 1984-03-12 1986-12-02 Polarmax Corporation Motorized antenna mount for satellite dish
US4691207A (en) * 1984-09-04 1987-09-01 Nissho Iwai American Corporation Antenna positioning apparatus
US4819002A (en) * 1985-10-02 1989-04-04 Societe Nationale D'etude Et De Construction De Moteurs D'aviation "S.N.E.C.M.A." Device for orienting and angularly positioning the axis of rotation of a rotatable load
US5085619A (en) * 1989-03-02 1992-02-04 Fanuc Ltd. Dual pinion anti-backlash tensioner for a robot
US5882158A (en) * 1996-05-31 1999-03-16 Deckel Maho Gmbh Drive assembly
US6002376A (en) * 1997-05-02 1999-12-14 Nec Corporation Antenna driving apparatus
US8512199B2 (en) 2010-07-26 2013-08-20 Rethink Robotics, Inc. Minimizing backlash utilizing series elastic elements
US8686680B2 (en) 2011-06-13 2014-04-01 Rethink Robotics, Inc. Dual-motor series elastic actuator
US9409298B2 (en) 2012-04-13 2016-08-09 Rethink Robotics, Inc. Flexure elements for series elastic actuators and related methods
US20140190321A1 (en) * 2013-01-09 2014-07-10 Illinois Tool Works Inc. Pipe machining apparatuses and methods of operating the same
US10029320B2 (en) 2013-01-09 2018-07-24 Illinois Tool Works Inc. Pipe machining apparatuses and methods of operating the same
US10835960B2 (en) 2013-01-09 2020-11-17 Illinois Tool Works Inc. Pipe machining apparatuses and methods of operating the same
US9399306B2 (en) 2013-01-09 2016-07-26 Illinois Tool Works Inc. Pipe machining apparatuses and methods of operating the same
US10730120B2 (en) 2013-01-09 2020-08-04 Illinois Tool Works Pipe machining apparatuses and methods of operating the same
US9610636B2 (en) * 2013-01-09 2017-04-04 Illinois Tool Works Inc. Pipe machining apparatuses and methods of operating the same
US10328493B2 (en) 2013-01-09 2019-06-25 Illinois Tool Works Inc. Pipe machining apparatuses and methods of operating the same
US9962768B2 (en) 2013-01-09 2018-05-08 Illinois Took Works Inc. Pipe machining apparatuses and methods of operating the same
WO2014134688A1 (en) * 2013-03-08 2014-09-12 Commonwealth Scientific And Industrial Research Organisation Anti backlash gearbox and system
US9531851B2 (en) * 2013-05-31 2016-12-27 Kathrein-Werke Kg Modular adjusting device, in particular for RF devices
US20160173665A1 (en) * 2013-05-31 2016-06-16 Kathrein-Werke Kg Modular adjusting device, in particular for rf devices
US9732990B2 (en) 2013-09-23 2017-08-15 Esolar Inc. Biased drive assemblies for heliostats

Also Published As

Publication number Publication date
GB1267117A (ja) 1972-03-15
JPS5525525B1 (ja) 1980-07-07

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