US3893125A - Motor operated telescopic antenna for vehicles - Google Patents

Motor operated telescopic antenna for vehicles Download PDF

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Publication number
US3893125A
US3893125A US419427A US41942773A US3893125A US 3893125 A US3893125 A US 3893125A US 419427 A US419427 A US 419427A US 41942773 A US41942773 A US 41942773A US 3893125 A US3893125 A US 3893125A
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United States
Prior art keywords
cable
housing
motor
winch
indentations
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Expired - Lifetime
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US419427A
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English (en)
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Bellomayre Michel De
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Individual
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Individual
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/08—Means for collapsing antennas or parts thereof
    • H01Q1/10—Telescopic elements
    • H01Q1/103—Latching means; ensuring extension or retraction thereof

Definitions

  • the [58] Fk'ld 323/903 cable is formed into a spiral within a flat housing, the ingoing cable coiling into the housing from the interior [561 Rekrences Cited of the spiral in such manner that the spiral is thrust UNITED STATES PATENTS 2/l94l Paton 343/903 against the inner periphery of the housing.
  • This invention relates to radio antennae and more specifically to the device for actuating telescopic antennae, notably telescopic automobile antennae.
  • an electric motor operates through a cable which is attached to the end strip of the telescopic whip antenna and which the motor winds in to retract the antenna or unwinds to extend it; in the former case the cable operates by pulling the end strip of the antenna and in the latter case by pushing it (the cable being prevented from buckling since it is channelled through the telescopic strips).
  • This cable is usually a relatively flexible Nylon cable which a winch mechanism driven by the motor draws from a magazine in order to push out the antenna or, conversely, drives back into the magazine in order to retract the antenna.
  • the present invention overcomes these various drawbacks by providing an appropriately devised telescopic antenna actuating device which operates through the agency of a long, flexible element which a motor unwinds or winds in such manner that the longitudinal centerline of said element forms a flat spiral housed in a flat magazine, that is caused to extend or retract the antenna by means of a winch mechanism comprising means for engaging with said element, which element is formed with evenly spaced openings along its length.
  • said element is a cable or ring of at least substantially circular section in its portions devoid of openings
  • the device is so contrived that the cable winds into the magazine from the interior of the spiral, and in so doing thrusts the previously formed cable spiral against the inner periphery of the magazine.
  • FIG. I is a front elevation view of the device
  • FIG. 2 is a rear elevation view, the cable magazine being assumed removed;
  • FIG. 3 is a sectional view through the line IIIIII of FIG. 2;
  • FIG. 4 is an electrical wiring diagram for control of the electric motor
  • FIG. 5 shows a detail of the winch mechanism
  • FIG. 6 shows a cable length in side elevation
  • FIG. 7 shows the cross-section of the cable through the line VII-VII in FIG. 6.
  • FIG. 8 illustrates a coupling capable of being mounted on the motor shaft.
  • FIGS. 9 and 10 show the component parts 20 and 21, respectively, of the coupling element shown in FIG. 8.
  • reference numeral 1 designates a known type of telescopic antenna the several strips of which telescope into one another and into a barrel 2 fast inside the car body.
  • the antenna is actuated in the usual way by means of a Nylon cable 3 which penetrates into the foot of barrel 2 and has its other end attached to the terminal strip of the antenna.
  • Cable 3 passes from a housing 4 into the foot of barrel 2.
  • Barrel 2 consists of a cable-coiling magazine 5 and a cable guiding and driving mechanism, the necessary drive being supplied by an electric motor 6 capable of rotating in both directions and controlled by a manual switch usually located on the dashboard.
  • a useful innovation provided by the present invention resides in the very flat shape of the housing. This particularity stems primarily from the design of the magazine provided for the cable 3 and from the nature and appropriate location of the drive means from the motor to winch 7, which means are contained in the housing and include a torque limiter of simple construction adapted to operate on the electric circuit of the motor if there is resistance in excess of a predetermined value.
  • the magazine proper shown in FIGS. 2 and 3, is formed by an oblate annular gutter 8 of U-shaped cross-section which is open towards the center and very slightly wider than the diameter of cable 3.
  • the latter which may be guided by a set of rollers and an access duct, enters the gutter through the opening in the U and coils therein into a single-layer spiral, the tightly coiled turns 3a of which are crowded and apply against the peripheral end of the gutter.
  • the width of the gutter is substantially equal to the gauge of cable 3, it is impossible for the turns 3a to overlap, and consequently the cable coils up in a twodimensional vertical space.
  • winch 7 is driven off drive gear ing comprising a ring-gear l2 incorporated in coupling 10 and a worm-gear 13 the shaft 14 of which is driven by motor 6.
  • a further innovation provided by this invention resides in the disposition of worm-gear 13 and its shaft 14 (see FIG. 2), or more precisely in their ability to shift longitudinally over a short distance limited by stop means, or, more exactly (as shown in FIG. 3), through being displaced by a peg 25 into which the oblate end 14a of shaft 14 is slidable, the lower end of housing 4 likewise forming an abutment.
  • the drive system described precedingly may be so devised that, when the antenna reaches the limit of its extension and the motor is subsequently reversed to retract the antenna, the drive is capable of operating under no load through an angular distance of close on one complete revolution in order to produce a jarring effect easily capable of overcoming frictional resistance and possible jamming.
  • FIG. 8 accordingly shows a coupling preferably made of a molded synthetic material in two mutually engaging parts 20, 21, of which 20 is coupled to the driving shaft 19 (the motor shaft) and the other part 21 with the driven shaft 14 (which drives the winch) through the agency of holes 200, 2lc, respectively, of incompletely circular shape.
  • the part 20 enters and adjusts itself inside the part 21 forming a sheath around it and that it is formed with two diametrically opposed ribs 20a, 20b located at different heights and adapted to bear against associated ribs 21a, 21b, whereby to produce the torque for driving shaft 14.
  • ribs 20a, 20b contact the other sides of ribs 210, 2 lb after having revolved under no load through nearly 360 (less the angular space occupied by each rib).
  • Switch 15 is connected, in a to-and-fro configuration with a manually operated switch or selector 30 (FIG. 4), into the excitation circuit of electric motor 6, the field winding of which is designated at 60.
  • the circuit will be closed once more only if selector 30 is subsequently moved to its lower contact stud, whereupon motor 6 will rotate in the opposite direction and extend the antenna until contact 16 trips upwardlyv
  • the travel of worm-gear 13 is used to trip the tumbler switch 15, which has the dual effect ofimmediately stopping electric motor 6 and preparing its excitation circuit for a subsequent rotation in the opposite direction.
  • one and preferably both flanges of winch 7 are formed with teeth or projections 7a and the cable 3 is formed with matching lateral indentations 3a (readily obtainable by molding).
  • These indentations are clearly shown in FIGS. 6 and 7. It will be appreciated from an examination of FIG. 7 that any two consecutive lateral indentations have their respective walls parallel to the cable axis and inclined to each other at an angle preferably in the region of 20, in order to ensure good action on the cable.
  • a device for actuating a telescopic antenna comprising a flat housing of annular shape having an interior periphery and an exterior periphery, a long, flexible cable of solid polymeric material formed with evenly spaced indentations along its length with at least substantially circular cross-section in its non-indented parts, said housing having a central opening for reversibly receiving and storing said cable, a motor which reversibly actuates through the agency of a drive winch said cable in such manner that the longitudinal centerline of said cable forms a flat spiral within said housing, said drive winch having means for engaging with said cable indentations, cable guiding means in said housing for directing said cable into the housing from the interior of the spiral and in such manner that the ingoing cable thrusts the previously formed cable spiral against the inner periphery of the housing.
  • a device as claimed in claim 1 including a cable magazine in the housing which is shaped as an annular gutter of U-shaped cross-section opening inwardly and of an inner width slightly greater than the diameter of the cable.
  • a device for actuating a telescopic antenna comprising a long, flexible cable driven by motor means, said cable having spaced indentations along its length and includes a substantially circular cross-section in its non-indented parts, the longitudinal centerline of said cable forms a flat spiral within a flat housing, said cable to respectively extend or retract the antenna through the agency of a drive winch having means for engaging said cable, means associated with the housing for receiving said cable at a location thereof such that said cable coils into the housing from the interior of the spiral and in such manner that the ingoing cable thrusts the previously formed cable spiral against the inner periphery of the housing, said drive winch means for engaging said cable includes two similar driving flanges formed with upstanding ribs adapted to cooperate with corresponding sets of indentations formed on the cable.
  • a device for actuating a telescopic antenna comprising a long, flexible cable driven by motor means, said cable having spaced indentations along its length and includes a substantially circular cross-section in its non-indented parts, the longitudinal centerline of said cable forms a flat spiral within a flat housing, said cable to respectively extend or retract the antenna through the agency of a drive winch having means for engaging said cable, means associated with the housing for receiving said cable at a location thereof such that said cable coils into the housing from the interior of the spiral and in such manner that the ingoing cable thrusts the previously formed cable spiral against the inner periphery of the housing, said housing being of substantially circular shape and contains said winch and a torque limiter, a motor operatively connected with said winch, the axis line of said motor passing through a place located substantially half-way along the radius of the flat housing, in a direction perpendicular to the direction of extension and retraction of the antenna, said torque limiter includes a driven member adapted to shift over a short distance longitudinally of
  • the motor includes a shaft which is connected to the winch shaft through a coupling comprising a driving member and a driven member, the driving member being formed at a determinate distance along its length with a single driving rib on its periphery that is adapted to bear against one side of a corresponding rib formed on the driven member, for a particular direction of rotation of the motor, and against the opposite side of said corresponding rib for the opposite direction of rotation of the motor.
  • said drive winch means for engaging with said cable indentations includes a flange having projecting ribs spaced to intermesh with corresponding indentations formed in said cable.
  • said guide means includes roller means which guide said cable into said flat housing.

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US419427A 1972-11-29 1973-11-27 Motor operated telescopic antenna for vehicles Expired - Lifetime US3893125A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7242384A FR2208204B1 (enrdf_load_stackoverflow) 1972-11-29 1972-11-29

Publications (1)

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US3893125A true US3893125A (en) 1975-07-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
US419427A Expired - Lifetime US3893125A (en) 1972-11-29 1973-11-27 Motor operated telescopic antenna for vehicles

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US (1) US3893125A (enrdf_load_stackoverflow)
JP (1) JPS4997548A (enrdf_load_stackoverflow)
DE (1) DE2359270A1 (enrdf_load_stackoverflow)
FR (1) FR2208204B1 (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4153825A (en) * 1978-04-26 1979-05-08 General Motors Corporation Electric switch and actuator for an antenna drive system
US4190841A (en) * 1977-12-27 1980-02-26 Harada Industry Co., Ltd. Car antenna system with bimetallic control means
US4209792A (en) * 1978-11-22 1980-06-24 General Motors Corporation Antenna cable drive and storage drum with stop mechanism
US4323902A (en) * 1980-10-03 1982-04-06 General Motors Corporation Power antenna with resilient mounting means
FR2505117A1 (fr) * 1981-05-01 1982-11-05 Sony Corp Appareil de projection video
US4426650A (en) 1979-05-04 1984-01-17 American Electronic Laboratories, Inc. Tape erectable antenna mast

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3200444A1 (de) * 1982-01-09 1983-07-21 Wilhelm Sihn jr. KG, 7532 Niefern-Öschelbronn Teleskopantenne mit betaetigungseinrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2233222A (en) * 1936-11-23 1941-02-25 Packard Motor Car Co Motor vehicle antenna
US2709220A (en) * 1954-01-25 1955-05-24 Nat Electronic Mfg Corp Extensible and retractible antenna
US2838953A (en) * 1953-10-08 1958-06-17 Casco Products Corp Power-operated radio antenna

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2233222A (en) * 1936-11-23 1941-02-25 Packard Motor Car Co Motor vehicle antenna
US2838953A (en) * 1953-10-08 1958-06-17 Casco Products Corp Power-operated radio antenna
US2709220A (en) * 1954-01-25 1955-05-24 Nat Electronic Mfg Corp Extensible and retractible antenna

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190841A (en) * 1977-12-27 1980-02-26 Harada Industry Co., Ltd. Car antenna system with bimetallic control means
US4153825A (en) * 1978-04-26 1979-05-08 General Motors Corporation Electric switch and actuator for an antenna drive system
US4209792A (en) * 1978-11-22 1980-06-24 General Motors Corporation Antenna cable drive and storage drum with stop mechanism
US4426650A (en) 1979-05-04 1984-01-17 American Electronic Laboratories, Inc. Tape erectable antenna mast
US4323902A (en) * 1980-10-03 1982-04-06 General Motors Corporation Power antenna with resilient mounting means
FR2505117A1 (fr) * 1981-05-01 1982-11-05 Sony Corp Appareil de projection video

Also Published As

Publication number Publication date
JPS4997548A (enrdf_load_stackoverflow) 1974-09-14
FR2208204A1 (enrdf_load_stackoverflow) 1974-06-21
FR2208204B1 (enrdf_load_stackoverflow) 1978-02-10
DE2359270A1 (de) 1974-06-12

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