US3543806A - Extendible boom - Google Patents

Extendible boom Download PDF

Info

Publication number
US3543806A
US3543806A US684241A US3543806DA US3543806A US 3543806 A US3543806 A US 3543806A US 684241 A US684241 A US 684241A US 3543806D A US3543806D A US 3543806DA US 3543806 A US3543806 A US 3543806A
Authority
US
United States
Prior art keywords
tabs
seam
wide
boom
edge
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
US684241A
Inventor
Frank C Rushing
Albert B Simon
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Application granted granted Critical
Publication of US3543806A publication Critical patent/US3543806A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • H01Q1/1235Collapsible supports; Means for erecting a rigid antenna

Definitions

  • Straitiff ABSTRACT An improved extendible boom of the unrolled thin wall strip, self-forming, hollow tube-type having overlapping tabs both inside and outside at its longitudinally extending seam; the improvement wherein the tabs of each seam edge consist of an alternating series of wide and narrow tabs with tapered side edges, with the wide tabs of one seam edge overlapping narrow tabs and abutting the tapered side edges of wide tabs, of the other seam edge.
  • FIGS. 1 and 2 are fragmentary views of the extendible boom showing details of the improved locking tab construction in .unengaged and engaged positions. respectively.
  • the extendible boom I of the present invention is formed of a narrow, elongated strip II of thin springlike material, such as heat treated metal a few thousandths of an inch thick, which is rolled onto a reel (not shown) and held in its rolled up state for storage. When released lengthwise from the reel under proper control and guidance it curls together edgewise and forms itself continuously into a hollow tubular shape as a rod or boom.
  • a narrow, elongated strip II of thin springlike material such as heat treated metal a few thousandths of an inch thick
  • opposing series of wide and narrow tabs and 16, respectively, are formed alternately in continuation along the longitudinal edges 12 of the strip 11; the narrow tabs I6 of one edge being opposite to the wide tabs 15 of the other edge.
  • the two side edges 17 ofat least each of the wide tabs 15 are tapered or slanted equal degrees in diverging directions progressively inward of such edges, and so alined at opposite edges of the strip across the seam that such edges 17 of the wide tabs 15 on one seam side abut the tapered-side edges 17 of the adjacent wide tabs 15 of the opposite seam side when the seam is formed by causing such wide tabs 15 to overlapthe narrower tabs 16, as in FIG. 2, or vice versa.
  • This arrangement prevents longitudinal clearance between the wide tabs 15 due to the slope of the abutting tapered or slanted side edges 17, while the overlap of tabs, narrow and wide, both inside and outside the boom I0 provides resistance to folding collapse of the seam both inwardly as well as outwardly.
  • a taper having a considerable component at right angles to the direction of seam extension in the region of contact assures locking action against longitudinal movement during twisting of the boom, while any longitudinal component of such taper forwardly facilitates the introduction of such tabs on opposite seam sides to one another when the seam springs together during erection of the boom.
  • a taper of 10 from being perpendicular to the longitudinal axis of the boom is suitable, for example, for the tapered side edges 17 in their region of contact.
  • An improvement in an extendible boom comprising: an elongated relatively thin springlike strip having a series of tabs formed on each of its opposite longitudinal edges for assuming overlapping positions to form an abutting seam therebetween when the strip is free to curl together edgewise into a cylindrical configuration; the improvement thereof wherein; the series of tabs on each strip edge consists of alternate wide and narrow tabs, the wide tabs of one edge being alined with the narrow tabs ofthe other edge for mutually overlapping relationship therebetween to form the seam; and
  • the wide tabs each have inwardly diverging side edges so located that each side edge of the wide tabs of one seam side contacts a point on the tapered edge of the adjacent wide tabs of the other seam side coexistent with the aforesaid mutually overlapping relationship with the narrow tabs.

Description

United States Patent Inventors Frank C. Rushing;
Albert B. Simon, Ellicott City, Maryland 684,241
Nov. 20, 1967 Dec. 1, 1970 Westinghouse Electric Corporation Pittsburgh, Pennsylvania in corporation of Pennsylvania Appl. No. Filed Patented Assignee EXTENDIBLE BOOM 1 Claim, 2 Drawing Figs.
US. Cl. 138/156, 52/108; 343/877 Int. Cl. 013 1/12 Field olSearch 113/8,12;
138/1S6,162,16917l;156/218;220/75, 76; l61/(lnquired); 52/108; 182/41; 343/877 [56] References Cited UNITED STATES PATENTS 167,796 9/1875 Somers 138/170X 207,606 9/1878 Ketcham 138/169 219,645 9/1879 Miller 220/76 556,819 3/1896 Hartman 138/156 828,899 8/1906 Parker 220/76 Primary Examiner-Laverne D. Geiger Assistant Examiner- Edward J Earls Attorneys-F. H. Henson, E. P. Klipfel and D. F. Straitiff ABSTRACT: An improved extendible boom of the unrolled thin wall strip, self-forming, hollow tube-type having overlapping tabs both inside and outside at its longitudinally extending seam; the improvement wherein the tabs of each seam edge consist of an alternating series of wide and narrow tabs with tapered side edges, with the wide tabs of one seam edge overlapping narrow tabs and abutting the tapered side edges of wide tabs, of the other seam edge.
Patented Dec; 1, 1970 3,543,806
FI G.I
INVENTOR WITNESSESI F k C R a ran u s mg Albert B.Simon FIG.2
sxrsunmu: BOOM BACKGROUND OF THE INVENTION SUMMARY OF THE INVENTION In accord with the present invention, the employment of wide tabs with tapered side edges which overlap narrower tabs and abut at their tapered side edges corresponding edges of adjacent wide tabs, eliminates clearance between tabs along the seam and prevents backlash during subjection of the boom to a torsional moment, as in employment of the boom for rotary positioning of a sensor or device at its end.
BRIEF DESCRIPTION OF THE DRAWING In the drawing: FIGS. 1 and 2 are fragmentary views of the extendible boom showing details of the improved locking tab construction in .unengaged and engaged positions. respectively.
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawing, the extendible boom I of the present invention, as heretofore, is formed of a narrow, elongated strip II of thin springlike material, such as heat treated metal a few thousandths of an inch thick, which is rolled onto a reel (not shown) and held in its rolled up state for storage. When released lengthwise from the reel under proper control and guidance it curls together edgewise and forms itself continuously into a hollow tubular shape as a rod or boom.
In accord with the present invention, opposing series of wide and narrow tabs and 16, respectively, are formed alternately in continuation along the longitudinal edges 12 of the strip 11; the narrow tabs I6 of one edge being opposite to the wide tabs 15 of the other edge. The two side edges 17 ofat least each of the wide tabs 15 are tapered or slanted equal degrees in diverging directions progressively inward of such edges, and so alined at opposite edges of the strip across the seam that such edges 17 of the wide tabs 15 on one seam side abut the tapered-side edges 17 of the adjacent wide tabs 15 of the opposite seam side when the seam is formed by causing such wide tabs 15 to overlapthe narrower tabs 16, as in FIG. 2, or vice versa. This arrangement prevents longitudinal clearance between the wide tabs 15 due to the slope of the abutting tapered or slanted side edges 17, while the overlap of tabs, narrow and wide, both inside and outside the boom I0 provides resistance to folding collapse of the seam both inwardly as well as outwardly. A taper having a considerable component at right angles to the direction of seam extension in the region of contact assures locking action against longitudinal movement during twisting of the boom, while any longitudinal component of such taper forwardly facilitates the introduction of such tabs on opposite seam sides to one another when the seam springs together during erection of the boom. A taper of 10 from being perpendicular to the longitudinal axis of the boom is suitable, for example, for the tapered side edges 17 in their region of contact.
We claim: I. An improvement in an extendible boom comprising: an elongated relatively thin springlike strip having a series of tabs formed on each of its opposite longitudinal edges for assuming overlapping positions to form an abutting seam therebetween when the strip is free to curl together edgewise into a cylindrical configuration; the improvement thereof wherein; the series of tabs on each strip edge consists of alternate wide and narrow tabs, the wide tabs of one edge being alined with the narrow tabs ofthe other edge for mutually overlapping relationship therebetween to form the seam; and
the wide tabs each have inwardly diverging side edges so located that each side edge of the wide tabs of one seam side contacts a point on the tapered edge of the adjacent wide tabs of the other seam side coexistent with the aforesaid mutually overlapping relationship with the narrow tabs. I
US684241A 1967-11-20 1967-11-20 Extendible boom Expired - Lifetime US3543806A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US68424167A 1967-11-20 1967-11-20

Publications (1)

Publication Number Publication Date
US3543806A true US3543806A (en) 1970-12-01

Family

ID=24747268

Family Applications (1)

Application Number Title Priority Date Filing Date
US684241A Expired - Lifetime US3543806A (en) 1967-11-20 1967-11-20 Extendible boom

Country Status (1)

Country Link
US (1) US3543806A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6112474A (en) * 1998-01-27 2000-09-05 Paine; David L. Retractable web column
US6217975B1 (en) 1996-03-25 2001-04-17 Rolatube Technology Limited Extendible member
US6256938B1 (en) * 1987-04-30 2001-07-10 Rolatube Technology Limited Elongate hollow element
US20050126106A1 (en) * 2003-12-12 2005-06-16 Murphy David M. Deployable truss having second order augmentation
US20060207189A1 (en) * 2005-03-15 2006-09-21 Pryor Mark K Deployable structural assemblies, systems for deploying such structural assemblies and related methods
US20060272265A1 (en) * 2005-04-08 2006-12-07 Pryor Mark K Deployable structural assemblies, systems for deploying such structural assemblies and related methods
US20110308174A1 (en) * 2010-06-22 2011-12-22 Nicholas Meyer Erectable and retractable rod device

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6256938B1 (en) * 1987-04-30 2001-07-10 Rolatube Technology Limited Elongate hollow element
US6217975B1 (en) 1996-03-25 2001-04-17 Rolatube Technology Limited Extendible member
US6112474A (en) * 1998-01-27 2000-09-05 Paine; David L. Retractable web column
US20050126106A1 (en) * 2003-12-12 2005-06-16 Murphy David M. Deployable truss having second order augmentation
US7694486B2 (en) 2003-12-12 2010-04-13 Alliant Techsystems Inc. Deployable truss having second order augmentation
US20100101172A1 (en) * 2003-12-12 2010-04-29 Alliant Techsystems Inc. Deployable truss having second order augmentation
US8006462B2 (en) 2003-12-12 2011-08-30 Alliant Techsystems Inc. Deployable truss having second order augmentation
US20060207189A1 (en) * 2005-03-15 2006-09-21 Pryor Mark K Deployable structural assemblies, systems for deploying such structural assemblies and related methods
US8042305B2 (en) 2005-03-15 2011-10-25 Alliant Techsystems Inc. Deployable structural assemblies, systems for deploying such structural assemblies
US20060272265A1 (en) * 2005-04-08 2006-12-07 Pryor Mark K Deployable structural assemblies, systems for deploying such structural assemblies and related methods
US7694465B2 (en) 2005-04-08 2010-04-13 Alliant Techsystems Inc. Deployable structural assemblies, systems for deploying such structural assemblies and related methods
US20110308174A1 (en) * 2010-06-22 2011-12-22 Nicholas Meyer Erectable and retractable rod device

Similar Documents

Publication Publication Date Title
US4256146A (en) Flexible composite tube
US3543806A (en) Extendible boom
US3696568A (en) Collapsible, extendible double tubular structure
US3177987A (en) Intermittently-lapped extendible boom
GB1441742A (en) Tubing
EP0915313A3 (en) Fin tube heat exchanger
US3601940A (en) Extendible boom
US1777782A (en) Externally and internally finned tube and method therefor
US2841183A (en) Collapsible tubing with protective rib
US3987927A (en) Bead joint
US3085596A (en) Collapsible tubing
US2745076A (en) Electrical connector
US441846A (en) Daniel n
US2025206A (en) Welding electrode
US3287668A (en) Delay line for traveling wave tubes, especially for millimeter-waves, constructed from a plurality of laddershaped structures, bent to form a spiral line
US1941151A (en) Flexible metallic tube
US1155460A (en) Armor for flexible articles.
US1134119A (en) Cable-armor.
ES488718A1 (en) Coil spring having a small axial and radial overall size
GB1508005A (en) Barbed wire
US1017243A (en) Car construction.
US2067665A (en) Veneered tubing
GB2012910A (en) Flexible Metallic Sleeve or Hose
US2198405A (en) Electric cable
US1348793A (en) Tube