US2714161A - Vibration arrester for multi-element antenna arrays such as used in television and f. m. - Google Patents

Vibration arrester for multi-element antenna arrays such as used in television and f. m. Download PDF

Info

Publication number
US2714161A
US2714161A US25098151A US2714161A US 2714161 A US2714161 A US 2714161A US 25098151 A US25098151 A US 25098151A US 2714161 A US2714161 A US 2714161A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
element
vibration
television
elements
antenna
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
Inventor
Arthur H Featherstun
Original Assignee
Arthur H Featherstun
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
Grant date

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • H01Q1/20Resilient mountings
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S343/00Communications: radio wave antennas
    • Y10S343/02Satellite-mounted antenna

Description

July 1955 A. H. FEATHERSTUN ,1

VIBRATION ARRESTER FOR MULTI-ELEMENT ANTENNA ARRAYS SUCH AS USED IN TELEVISION AND F. M.

Filed Oct. 12. 1951 INVENTOR APTHUE H. F634 THEEJ TU/V,

United btates Patent VIBRATION STER FQR MULTI-ELEMENT ANTENNA ARRAYS SUCH AS USED IN TELE- VISION AND F. I /l.

Arthur H. Featherstun, Mount Vernon, Ill. Application October 12, U51, Serial No. 250,981 4 Claims. (Cl. 250-33) This invention relates to antenna structure, and more particularly to means for preventing excessive vibration of the elements of antennas of the type employed for television and frequency modulation reception.

A main object of the invention is to provide novel and improved means for damping the vibration of the elements of antennas, such as the elements employed in television and frequency modulation antennas, said means being very simple in construction, being easy to install, involving a minimum amount of modification of existing structures, and providing effective damping of the vibration which would otherwise occur in the elements, whereby damage and breakage of the elements are avoided.

A further object of the invention is to provide an improved vibration arresting means for the elements of antennas, such as television and frequency modulation antennas, said means involving inexpensive components, being adaptable for fabrication on the elements at the time of manufacture, or for clamping on existing antenna elements, and providing an effective arrangement for preventing excessive vibration of the elements, whereby bending and breakage to said elements is prevented and the etficiency of the antenna is maintained over long periods of time without requiring repair or servicing.

Further objects and advantages of the invention will become apparent from the following description and claims, and from the accompanying drawings, wherein:

Figure l is a perspective View of a television antenna provided with a vibration-damping means according to the present invention;

Figure 2 is an enlarged cross-sectional view taken on the line 2-2 of Figure l, and showing the specific structure involved in the vibration damping means;

Figure 3 is a side elevational view of the structure of Figure 2;

Figure 4 is a cross-sectional view taken on the line 4-4 of Figure 3;

Figure 5 is an end elevational view of the structure of Figures 2 and 3;

Figure 6 is a longitudinal cross-sectional view taken through a modified form of vibration-damping means according to the present invention, which may be employed on the elements of an existing antenna, or which may be optionally installed on the elements during the manufacture of the antenna;

Figure 7 is a side elevational view of a further modified form of vibration-damping means especially adapted to be installed on existing antennas and showing the manner of connection of the vibration-damping means to an element of an existing antenna;

Figure 8 is a cross-sectional view taken on the line 88 of Figure 7.

Referring to the drawings, and more particularly to Figures 1 to 5, 11 generally designates a television antenna structure comprising the vertical mast 12, the horizontal boom 13 clamped to the mast in the usual manner, the folded dipole 14 secured to one end of the 2,714,16l Patented July 26, 1955 boom 13 in the usual manner, and the horizontally extending, rod-like elements 15 secured to the boom 13. As shown in Figure 1, the elements 15 are secured rigidly at their mid-portions to the boom 13, and the respective ends of the elements are free. In the case of the conventional antenna structure, the elements 15 are free to vibrate under wind forces or other causes, and when the vibration occurs at a frequency close to the natural frequency of vibration of the element, the amplitude of the vibration may become so excessive as to cause the element to snap oif adjacent to its point of connection to the boom 13. In this manner, a great number of elements become broken and require replacement, especially where the antenna is mounted at a considerable elevation and is exposed to heavy wind forces.

The element 15 is usually formed of hollow, tubular stock, as shown in Figure 2, and in accordance with the present invention, the element is crimped at 16, 16, as well as at the end of the element, as shown at 17, t0 define a tubular housing element 18. Loosely mounted in the housing element 18 is a damping weight element 19, which may comprise a short length of heavy gauge, rubber-covered Wire, such as No. 6 gauge rubber-covered Wire, having the copper conductor portion 20 and the rubber sheath 21. The damping weight 19 may have a length of the order of one inch, and the length of housing element 18 may be of the order of two and one-half inches, whereby the damping weight 19 is freely movable longitudinaly in the housing element and is also freely movable to some degree in a direction at right angles to its axis.

Both ends of each element 15 are similarly provided with the vibration-arresting means, as above described, whereby when the element 15 tends to vibrate, the damping elements 19 in the housing portions 18 at the ends of the element shift in position and prevent the free portions of the element from vibrating at their natural resonant frequencies. Thus, the amplitudes of vibrations of the free portions of the element 15 are kept reasonably low, and the stresses produced in the element 15 as a result of such vibrations are kept below the values at which breakage of the element would occur.

Referring now to Figure 6, a modified form of vibration-damping means is disclosed comprising a hollow plug element 22 of plastic material or other similar durable material formed with a reduced hollow stem portion 23 having a longitudinal drain slot 30 and with a cavity 24 communicating with the stem portion 23 by a passage 25. Loosely positioned in the cavity 24 is a weighted ball 26 which is free to move longitudinally in the cavity 24, as well as in a direction transverse to the axis thereof. The reduced tubular portion 23 of the vibration arrester is secured in the end of the antenna element, shown at 15, and may be secured therein in any suitable manner, as by a tight frictional fit. The vibration-arresting means may be secured in the end of the element 15 either during the manufacture of the antenna, or after the antenna has been installed. The operation of the device is similar to the operation of the form of the invention disclosed in Figures 1 to 5, namely, when vibration of the free portions of the element 15 occur, the weight element 26 shifts its position in the cavity 24 and prevents the free portions of the element from vibrating at their natural resonant frequency.

In the form of the invention shown in Figures 7 and 8, a hollow plug element 22 having a reduced portion 23 is clamped to the end portion of an antenna element, shown at 35 and which is provided with opposed clamping channel elements 37, 37 engaged around the reduced portion 23' of the vibration arrester. Plug element 22' is formed with a longitudinal drain slot 30', as shown. A clamping bolt 38 is provided for exerting the required clamping pressure on the reduced portion 23 to rigidly secure the vibration-arresting device to the end portion of the horizontally extending antenna element 35. As in the previous embodiments of the invention, when the element 35 begins to vibrate, the weighted ball 26 inside the housing portion 22' shifts its position and prevents the element from vibrating continuously at its natural resonant frequency. This maintains the amplitude of vibration at a low value and prevents breakage of the element, as above described.

While certain specific embodiments of an improved vibration-arresting means for the free element portions of television and frequency modulation antennas have been disclosed in the foregoing description, it will he understood that various modifications within the spirit of the invention may occur to those skilled in the art. Therefore, it is intended that no limitations be placed on the invention except as defined by the scope of the appended claims.

What is claimed is:

1. In a multi-element antenna array, the combination of a horizon-tally extending element having at least one free end, and vibration damping means comprising a housing rigidly secured to said free end and having an internal cavity extending in. the same direction as said element, and a movable damping weight contained in said cavity, said Weight comprising a unitary body having a volume which occupies a substantial portion of the volume of said cavity but which is substantially smaller both longitudinally and transversely than said cavity,

whereby the weight is free to move both transversely and longitudinally in the cavity.

2. In a. multi-element antenna. array, the combination of a horizontally extending element having free ends, respective elongated housings rigidly secured to said free ends and having internal cavities extending in the same direction as said. element, and respective damping weights movably disposed in said cavities for free movement therein, each of said weights. comprising. a unitary body having a volume which. occupies. a substantial portion of the volume of itsv respective. cavity butwhich. is substantially smaller both longitudinally and transversely than said cavity, whereby the weights are free to move both transversely and longitudinally in the cavities.

3. In a multi-element antenna array of the character described, the combination of a horizontally extending boom, a horizontal element rigidly secured at its mid portion to said boom, respective tubular housings rigidly carried at the ends of said element and having internal cavities extending in the same direction as said element, and respective damping weights loosely disposed in said housings for free movement therein, each of said weights comprising a unitary body having a volume Which occupies a substantial portion of the volume of its respective cavity but which is substantially smaller both longitudinally and transversely than said cavity, whereby the weights are free to move both longitudinally and transversely in the cavities.

4. in a multi-element antenna array, the combination of a horizontally extending boom, 2. horizontal element rigidly secured at its mid portion to said boom, respective tubular housings rigidly carried at the ends of. said element and having internal cavities extending in the same direction as said element, and respective elongated damping weights loosely disposed in said housings for free movement therein, each Weight comprising a unitary body having a volume which occupies a substantial portion of the volume of its respective cavity but which is substantially smaller both longitudinally and transversely than said cavit whereby the weights are free to move both longitudinally and transversely in the cavities.

References Cited in the file of this patent UNITED STATES PATENTS 2,155,052 Byland' Apr. 18, 1939 2,195,041 Von- Schlippe' Mar. 26, 1940 2,302,670 Buchanan Nov. 24, 1942 2,462,961 Harker Mar. 1, 1949 2,586,043 Hodgson-et al Feb. 19, 1952 FOREIGN PATENTS 652,318 Great Britain Apr. 1 8-, 1951

US2714161A 1951-10-12 1951-10-12 Vibration arrester for multi-element antenna arrays such as used in television and f. m. Expired - Lifetime US2714161A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US2714161A US2714161A (en) 1951-10-12 1951-10-12 Vibration arrester for multi-element antenna arrays such as used in television and f. m.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2714161A US2714161A (en) 1951-10-12 1951-10-12 Vibration arrester for multi-element antenna arrays such as used in television and f. m.

Publications (1)

Publication Number Publication Date
US2714161A true US2714161A (en) 1955-07-26

Family

ID=22949980

Family Applications (1)

Application Number Title Priority Date Filing Date
US2714161A Expired - Lifetime US2714161A (en) 1951-10-12 1951-10-12 Vibration arrester for multi-element antenna arrays such as used in television and f. m.

Country Status (1)

Country Link
US (1) US2714161A (en)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2866195A (en) * 1954-02-23 1958-12-23 Neil C Powlison Television receiving antenna
US3031046A (en) * 1959-07-03 1962-04-24 United Aircraft Corp Sandwich structure
US3210765A (en) * 1961-06-12 1965-10-05 Collins Radio Co Antenna element damping device
US3277486A (en) * 1962-06-12 1966-10-04 Manfred F Kuebler Method and means for damping nutation in a satellite
DE1282747B (en) * 1962-04-30 1968-11-14 Anton Kathrein Aelteste Spezia dipole antenna
US3419871A (en) * 1965-10-23 1968-12-31 Comm Structures Inc Antenna feedhorn support structure
US3612222A (en) * 1970-02-18 1971-10-12 Kearney National Inc Pole damping system
US3826340A (en) * 1973-09-19 1974-07-30 H Brokaw Vibration damper for slender vertical structures
US3911199A (en) * 1974-04-26 1975-10-07 Westinghouse Electric Corp Seismic motion-damper for upstanding electrical equipment
US4472024A (en) * 1981-01-07 1984-09-18 Olympus Optical Co. Ltd. Apparatus for driving objective lens
US4953672A (en) * 1988-04-28 1990-09-04 Nippon Cable System, Inc. Control cable system with device for reducing vibration
US6348899B1 (en) 2000-05-24 2002-02-19 David M. Bergstein Antenna mast adapter
US6435323B2 (en) 1999-12-16 2002-08-20 Texas Tech University Distributed aerodynamic and mechanical damping of cables with active smart control
US6439359B1 (en) * 1998-09-02 2002-08-27 Tokai Rubber Industries, Ltd. Damper for vehicles
US6494444B2 (en) 2000-03-01 2002-12-17 Tokai Rubber Industries, Ltd. Vibration damping device for vehicles
US6536566B2 (en) 2000-02-28 2003-03-25 Tokai Rubber Industries, Ltd. Vibration-damping device for vehicles
US6554112B2 (en) 2000-09-08 2003-04-29 Tokai Rubber Industries, Ltd. Vibration-damping device for vehicle
US6598718B2 (en) 2001-03-30 2003-07-29 Tokai Rubber Industries, Ltd. Vibration damping device having a flock coating
US6641119B2 (en) 2001-01-29 2003-11-04 Tokai Rubber Industries, Ltd. Vibration-damping device having independent mass member
US6705440B2 (en) 1999-08-23 2004-03-16 Texas Tech University Cable stay damper band and method of use for reduction of fluid induced cable vibrations
US6719108B2 (en) 2000-03-27 2004-04-13 Tokai Rubber Industries, Ltd. Virbration damping device for vehicles
US6722481B2 (en) 2001-09-25 2004-04-20 Tokai Rubber Industries, Ltd. Vibration-damping device
US6854721B2 (en) 2001-02-19 2005-02-15 Tokai Rubber Industries, Ltd. Vibration-damping device
US20050132945A1 (en) * 2003-12-17 2005-06-23 Tokai Rubber Industries, Ltd. Noise reducing device
US20050217955A1 (en) * 2004-04-01 2005-10-06 Minor Ray C Pole vibration damping assembly and method
US20050253317A1 (en) * 2004-05-14 2005-11-17 Tokai Rubber Industries, Ltd. Vibration-damping device for vehicles and method of manufacturing the same
US6991077B2 (en) 2001-09-28 2006-01-31 Tokai Rubber Industries, Ltd. Vibration damping device
US20070221460A1 (en) * 2006-03-23 2007-09-27 Tokai Rubber Industries, Ltd. Vibration damping device for internal combustion engine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB652318A (en) *
US2155052A (en) * 1936-04-27 1939-04-18 Dresag A G Means for destroying the energy of mass oscillations of solid bodies
US2195041A (en) * 1935-09-23 1940-03-26 Messerschmitt Boelkow Blohm Means for damping oscillations
US2302670A (en) * 1941-10-14 1942-11-24 James A Buchanan Accelerometer
US2462961A (en) * 1945-01-24 1949-03-01 United Aircraft Corp Propeller blade vibration absorber
US2586043A (en) * 1950-10-14 1952-02-19 Northrop Aircraft Inc Kinetic boom damper

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB652318A (en) *
US2195041A (en) * 1935-09-23 1940-03-26 Messerschmitt Boelkow Blohm Means for damping oscillations
US2155052A (en) * 1936-04-27 1939-04-18 Dresag A G Means for destroying the energy of mass oscillations of solid bodies
US2302670A (en) * 1941-10-14 1942-11-24 James A Buchanan Accelerometer
US2462961A (en) * 1945-01-24 1949-03-01 United Aircraft Corp Propeller blade vibration absorber
US2586043A (en) * 1950-10-14 1952-02-19 Northrop Aircraft Inc Kinetic boom damper

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2866195A (en) * 1954-02-23 1958-12-23 Neil C Powlison Television receiving antenna
US3031046A (en) * 1959-07-03 1962-04-24 United Aircraft Corp Sandwich structure
US3210765A (en) * 1961-06-12 1965-10-05 Collins Radio Co Antenna element damping device
DE1282747B (en) * 1962-04-30 1968-11-14 Anton Kathrein Aelteste Spezia dipole antenna
US3277486A (en) * 1962-06-12 1966-10-04 Manfred F Kuebler Method and means for damping nutation in a satellite
US3419871A (en) * 1965-10-23 1968-12-31 Comm Structures Inc Antenna feedhorn support structure
US3612222A (en) * 1970-02-18 1971-10-12 Kearney National Inc Pole damping system
US3826340A (en) * 1973-09-19 1974-07-30 H Brokaw Vibration damper for slender vertical structures
US3911199A (en) * 1974-04-26 1975-10-07 Westinghouse Electric Corp Seismic motion-damper for upstanding electrical equipment
US4472024A (en) * 1981-01-07 1984-09-18 Olympus Optical Co. Ltd. Apparatus for driving objective lens
US4953672A (en) * 1988-04-28 1990-09-04 Nippon Cable System, Inc. Control cable system with device for reducing vibration
DE19882785B4 (en) * 1998-09-02 2005-12-15 Tokai Rubber Industries, Ltd., Komaki Use of a vibration damping device for an automobile
US6439359B1 (en) * 1998-09-02 2002-08-27 Tokai Rubber Industries, Ltd. Damper for vehicles
US6705440B2 (en) 1999-08-23 2004-03-16 Texas Tech University Cable stay damper band and method of use for reduction of fluid induced cable vibrations
US6435323B2 (en) 1999-12-16 2002-08-20 Texas Tech University Distributed aerodynamic and mechanical damping of cables with active smart control
US6536566B2 (en) 2000-02-28 2003-03-25 Tokai Rubber Industries, Ltd. Vibration-damping device for vehicles
US6494444B2 (en) 2000-03-01 2002-12-17 Tokai Rubber Industries, Ltd. Vibration damping device for vehicles
EP1132644A3 (en) * 2000-03-01 2003-06-25 Tokai Rubber Industries, Ltd. Vibration damping device for vehicles
US6719108B2 (en) 2000-03-27 2004-04-13 Tokai Rubber Industries, Ltd. Virbration damping device for vehicles
US6348899B1 (en) 2000-05-24 2002-02-19 David M. Bergstein Antenna mast adapter
US6554112B2 (en) 2000-09-08 2003-04-29 Tokai Rubber Industries, Ltd. Vibration-damping device for vehicle
US6641119B2 (en) 2001-01-29 2003-11-04 Tokai Rubber Industries, Ltd. Vibration-damping device having independent mass member
US6854721B2 (en) 2001-02-19 2005-02-15 Tokai Rubber Industries, Ltd. Vibration-damping device
US6598718B2 (en) 2001-03-30 2003-07-29 Tokai Rubber Industries, Ltd. Vibration damping device having a flock coating
US6722481B2 (en) 2001-09-25 2004-04-20 Tokai Rubber Industries, Ltd. Vibration-damping device
US6991077B2 (en) 2001-09-28 2006-01-31 Tokai Rubber Industries, Ltd. Vibration damping device
US20050132945A1 (en) * 2003-12-17 2005-06-23 Tokai Rubber Industries, Ltd. Noise reducing device
US20050217955A1 (en) * 2004-04-01 2005-10-06 Minor Ray C Pole vibration damping assembly and method
US7232017B2 (en) * 2004-04-01 2007-06-19 Kearney-National Inc. Pole vibration damping assembly and method
US20050253317A1 (en) * 2004-05-14 2005-11-17 Tokai Rubber Industries, Ltd. Vibration-damping device for vehicles and method of manufacturing the same
US7267740B2 (en) 2004-05-14 2007-09-11 Tokai Rubber Industries, Ltd. Vibration-damping device for vehicles and method of manufacturing the same
US20080018032A1 (en) * 2004-05-14 2008-01-24 Tokai Rubber Industries, Ltd. Vibration-damping device for vehicles and method of manufacturing the same
US20070221460A1 (en) * 2006-03-23 2007-09-27 Tokai Rubber Industries, Ltd. Vibration damping device for internal combustion engine

Similar Documents

Publication Publication Date Title
US2680585A (en) Vibration isolator
US4660797A (en) Mount for an exhaust system of a motor vehicle
US5791638A (en) Coil spring with ends adapted for coupling without welding
US2199083A (en) Transmission of guided waves
US2949589A (en) Microwave communication lines
US3458862A (en) Quadruply ridged waveguide and horn antenna
US4706788A (en) Vibration damped apparatus
US4546950A (en) Shock absorbing support for microphones
US3652778A (en) Insulating spacer
US6643437B1 (en) All-dielectric self-supporting optical cable and manufacturing method thereof
US2454766A (en) Broad band antenna
US2978702A (en) Antenna polarizer having two phase shifting medium
US2299218A (en) Adjustable dipole antenna unit
US6345706B1 (en) Electrical coupling assembly for a magnetorheological damper
US4282938A (en) Vibration insulation device for handle of vibratory machine
US5169110A (en) Force-damping energy-removing isolator
US3296361A (en) Universally self-adjusting fitting
US4955309A (en) Yieldable line assembly and in line shock absorber
US4712778A (en) Helical spring holder assembly
US5358224A (en) Isolator mount assembly
US2584162A (en) Impedance matching device for wave guide junctions
RU2288388C1 (en) Net beaded insulator
US2915580A (en) Spacing devices for overhead wires
US6094121A (en) Engine igniting coil device
US4149612A (en) Noise reducing resonator apparatus