US3851873A - Asymmetric bars for use in gymanastics - Google Patents

Asymmetric bars for use in gymanastics Download PDF

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Publication number
US3851873A
US3851873A US00396104A US39610473A US3851873A US 3851873 A US3851873 A US 3851873A US 00396104 A US00396104 A US 00396104A US 39610473 A US39610473 A US 39610473A US 3851873 A US3851873 A US 3851873A
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United States
Prior art keywords
upright
semi
pin
stand
handrail
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Expired - Lifetime
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US00396104A
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English (en)
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B Thomasson
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B3/00—Parallel bars or similar apparatus
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/33—Transverse rod to spaced plate surfaces

Definitions

  • the upper handrail is 24 /13 1; 403 1 7 supported by uprights, each of which is divided into two sections, the lower of which is pivotally mounted 5 References Cited to a stand and to the upper section which in turn is UNITED STATES PATENTS fixed to the adjacent upright supporting the lower 1 H1 268 9/1914 M d t 272/63 handrail by use a telescoping bar through which the 6 ar .I 1,734,664 11/1929 Albach 272/63 dlstance between the handra'ls altered 3,397,882 8/1968 Reuther .6 272/63 5 Claims, 4 Drawing Figures PATENTEL DEB 31974 SHEET 2 BF 2 ASYMMETRIC BARS FOR USE IN GYMANASTICS FIELD OF THE INVENTION
  • the present invention relates to asymmetric bars as used by gymnasts. More particularly to an apparatus to increase the possibilities for adjusting the spacing of the bars without jeopardizing the perpendicularity of the handrails.
  • asymmetric bars comprise parallel horizontal bars or handrails supported at different levels by two pairs of uprights braced by tensioning cables. Since the permissible height of the handrails is controlled by international regulations, adjustment of the handrail spacing with a view to adapting them to the height of the gymnasts may only be achieved by modifying the inclination of one or both pairs of uprights, which may be pivoted to a stand.
  • the handrails are of oval cross-section and the major axis of this section should remain vertical as far as possible. With conventional apparatus, movement of the handrails closer together or further apart causes their major axes to be necessarily inclined since these handrails are integral with the uprights.
  • the hand-rails may be separated by as much as 780mm, which corresponds to an inclination of the hand-rails of more than 7 from the vertical. But it is necessary in certain circumstances to have a spacing of as much as 900mm. for the reasons above-described, which results in an inclination of more than 10 with conventional apparatus. Such an inclination hinders gymnasts considerably. This is unacceptable.
  • asymmetric bars comprising a stand, a lower handrail supported by two uprights whose position with respect to the stand of the apparatus is fixed, and an upper handrail which is supported by two uprights which may be inclined.
  • Each of the uprights of the upper handrail is formed by two tubular semi-uprights.
  • the lower semi-upright is pivotally attached at its base to the stand and is shorter than the corresponding lower tube of the lower handrail.
  • the upper semiuprighti is arranged substantially vertically and is pivotally attached to the top of the lower semi-upright by a horizontal pin arranged parallel to the handrails.
  • the bottom of the upper semi-upright is integral with one end of a substantially horizontally arranged telescopic bar, the other end of this bar being pivotally connected, by means of horizontal pin arranged parallel to the handrails, to the corresponding upright of the lower handrail.
  • the inclination of the lower semi-uprights can be varied, while the inclination of both the telescopic bars and the upper semi-uprights varies to only a negligible extent.
  • the lower semi-uprights are pivotally attached at their base to the stand by means of a single horizontal pin arranged parallel to the hand-rails.
  • This embodiment thus uses a single articulation of the lower semi-uprights to the stand.
  • the top of each lower semi-upright can thus describe an arc of a'circle centered on the pivot pin.
  • the lower semi-uprights are pivotally attached at their base to the stand by means of a double pivot comprising a first member pivoted to the stand by a pin parallel to the hand-rails, and a second memberpivoted to the first by a pin arranged parallel to the hand-rails and integral with the base of the respective semi-uprights.
  • the lower semi-upright is thus able to be rotated about one or the other of the aforesaid pins depending upon the side to which it is to be inclined.
  • the top of each lower semi-upright can thus describe, depending upon the side to which it is to be inclined, a trajectory in the form of an arc of a circle centered at one or the other of the pins of the double pivot.
  • the distance between the two pins of the double pivot is substantially equal to half the latitude for adjusting the spacing of the hand-rails and the base of each lower semiupright is placed at an equal distance from the two respective pivot pins as determined when the lower semiupright is in a vertical position. So spaced, the trajectory of the top of each lower semi-upright will describe two equal arcs the limits of which are located at the same level, which in turn is located barely lower than the level of the centers of the arcs. This latter embodiment gives the most satisfactory results: the spacing is adjustable between 540 and 900mm, the inclination of the hand-rails never exceeds 1 and variations in the level of the upper hand-rail remain less than mm.
  • FIG. 1 is a side elevational view of asymmetric bars according to the invention in the vertical position
  • FIG. 2 illustrates the adjustment of bars provided with a single pivot at the base of the lower semiuprights
  • FIG. 3 illustrates the adjustment of bars provided with a double pivot at the base of the lower semiuprights
  • FIG. 4 is a partial sectional view of a double pivot to an enlarged scale.
  • FIG. 1 shows the asymmetric bars from the side, comprising lower and upper hand-rails 2 and 3 respectively, of which only the ends may be seen.
  • the handrails 2 and 3 are fixed by means of an arrangement of uprights to a stand 4 resting on the ground.
  • the lower hand-rail 2 is supported at its ends by two uprights 5.
  • the uprights 5 are fixed with respect to the stand 4 in a vertical position.
  • Each upright 5 comprises a lower tube 6 into which is slidably mounted an upper tube 7 of smaller diameter. It is thus possible to adjust the lower hand-rail 2 to the desired level. It should be noted that the hand-rail 2 may only be displaced in a vertical plane and consequently that the major axis of its oval cross-section always remains vertical. The lower hand-rail 2 may not be inclined to the vertical at all.
  • the upper hand-rail 3 is supported at its ends by two uprights 8, each comprising two parts 9 and I1 pivoted to each other, hereinafter referred to as semi' uprights.
  • a lower semi-upright 9 is formed by a tube which is slightly shorter than the lower tube 6 of the upright 5. It is pivoted at its lower end to the stand 4 by means of a single or double pivot 12 allowing it to move in only one plane. perpendicular to the hand-rails 2 and 3. The distance d between the pivot 12 and the base of the uprights 5 corresponds to the means spacing between the hand-rails 2 and 3.
  • the lower semi-uprights 9 may be kept in a vertical position as shown in FIG. 1, or be inclined inwards or outwards, thus forming an angle A with the vertical.
  • An upper semi-upright 11 comprises a tube lla pivoted at its lower end to the top of a respective lower semi-upright 9.
  • the pin 13 of this pivot is horizontal.
  • each tube Ila Slidably mounted in each tube Ila is a tube 11b of lesser diameter. supporting the upper hand-rail 3 and making it possible to locate the latter at the desired level.
  • the major axis of the oval cross-section of the upper hand-rail 3 forms an angle B, shown with the vertical equal to the inclination of the upper semi-uprights 11 to the vertical.
  • the angle B represents the angle formed by the major axes of the cross-sections of the two hand-rails. since that of hand-rail 2 remains vertical.
  • Uprights 5 and 8 located on opposite sides of the asymmetric bars are connected to each other by means of a telescopic bar 14 which is substantially horizontal.
  • the end of the bar 14 located adjacent to the upright 5 is pivoted to the latter by a horizontal pin 15 arranged parallel to the hand-rails.
  • the pin 15 is located slightly below the top of the tube 6 and at the same level as the pivot pin 13 uniting the two semi-uprights 9 and 11 provided lower semi-upright 9 is in the vertical position, which corresponds to the view shown in FIG. 1.
  • the other end of the bar 14, located adjacent to the upright 8, is integral with the base of the upper semiupright 11 with which is formed an angle C of
  • the bar 14 comprises an elbow 16 at its end adjacent to the upright 5 and is slightly inclined from the horizontal such that the pins i5 and 13 are substantially at the same level.
  • the length of the telescopic bar 14 is altered. This has the effect of giving the lower semi-upright 9 an inclination A to the vertical. in one direction or the other.
  • the pin 13 for pivoting the semi-uprights 9 and 11 moves along an arc of a circle 17, centered on the axis of rotation 18 of the pivot 12; its level varies and consequently the telescopic bar 14 assumes a certain inclination B to the horizontal, equal to the inclination B of the upper semi-upright II to the vertical.
  • the lower semi-upright 9 is inclined by an angle A to the vertical. its upper end 13 having described from the mean position designated by T an arc TM of dimension A and of radius R. If N designates the point of intersection other than M of the direction of the telescopic bar 14 with the circle 17, the dimension of angle 8 is equal to:
  • V2 (TM TN) This dimension clearly varies according to the ratio of the length of the semi-upright 9 to the distance d, but the figure shows that. if the angle A is quite small. the angle B is in turn much smaller still than the angle A. It should be noted that whatever the direction of inclination of the lower semi-upright 9. the direction of inclination of the telescopic bar 14 will always be the same. consequently. the upper semi-upright 11 is always inclined towards the outside of the apparatus. The inclination of the two semi-uprights 9 and 11 inevitably involves a lowering of the upper hand-rail 3, but this remains negligible provided that angle A is not too great.
  • the device according to the invention is compared with a device currently on the market. in which the upper hand-rail 3 is supported by rigid uprights 21, represented in dot-dash line in FIG. 2, the lowering of the hand-rail 3 may be less with the standard device but its inclination D is clearly greater than the inclination B obtained with the new device.
  • the invention has considerable advantage even with a pivot 12 of the single type.
  • pivot 12 of the double type similar to the pivots which make it possible to open a door from either direction.
  • a pivot of this type is illustrated in FIG. 4 in an enlarged scale.
  • This double pivot 12 uses an intermediate member 22 pivoted to the stand 4 by a pin 23 and to a member 24 integral with the base of the semi-upright 9 by a pin 25.
  • the pins 23 and 25 are parallel to the hand-rails and are located on either side of the base of the semiupright 9 and at an equal distance from the latter provided the semi-upright 9 is in the vertical position.
  • L designates the distance separating the pins 23 and 25 which is slightly less than the length of the member 22.
  • This member 22 may occupy a horizontal position, as shown in full line in FIG. 4, by resting on a plate 26 forming the base of the stand 4. It may also occupy an inclined position, as shown in dot-dash line in FIG.
  • the member 24 is pivoted to one end of the member 22 and its free end is directed towards the other end of the member 22. Locking means integral with the member 22, constituted by abutments not shown, prevent the member 24 from descending below the member 22. Thus, the member 24 may occupy a position parallel to the member 22, as shown in dot-dash line, or even a position inclined above the member 22, as shown in full line.
  • the aperture 27 is sufficiently long to allow the member 24 to project above the stand 4.
  • the axis 28 of the semiupright 9 is arranged to be perpendicular to the member 24 at a distance L/2 from the pin 25.
  • the base of the semi-upright 9 and the member 24 form a rigid arrangement.
  • the semi-upright 9 is inclined towards the outside, as shown in full-line, the member 22 remains horizontal, whereas the member 24 is raised by pivoting about the pin 25.
  • the upper i In contrast to the single-pivot embodiment, the top of end of the semi-upright 9 describes an arc of a circle 29 whose axis is the same as that of the pin 25.
  • the radii 32 and 33 joining the centers of rotation 23 and 25 to the top of the semi-upright 9 each describe an angle A. chosen such that the top of the semiupright 9 may be displaced between two extreme positions separated by a distance 2L.
  • the adjustment latitude 2L is 360mm.
  • the distance separating the pins 23 and 25 is l80mm.
  • the pivot 12 has its center located at a distance D equal to 720mm. from the base of the uprights 5 supporting the lower hand-rail 2.
  • the angle formed by the extreme positions of the semiupright 9 is approximately equal to 2A; to obtain the same possibilities of adjustment with a single pivot, it is thus necessary that the angle A has substantially the same dimensions as the maximum angle of inclination to the vertical assumed by the lower semiupright 9 in the ease of the single pivot.
  • the double pivot has an additional advantage owing to the fact that the pin 13 undergoes less variations in height, and the inclination B of the telescopic bars 14 and consequently, the inclination of the upper handrail 3 are further reduced.
  • the results obtained have proven very satisfactory.
  • the inclination of the upper hand-rail 3 remains less than 1 and the latter undergoes fluctuations of height less than 5mm., while the spacing may be regulated between the extreme values of 540 and 900mm.
  • Adjustable asymmetric bars for use in gymnastics comprising a stand
  • each of said at least one lower handrail supporting upright being fixedly mounted to said stand in a vertical position and means for adjusting the level of said lower handrail with respect to said stand;
  • each of said at least one upper handrail supporting upright being inclinable and comprising two semiuprights, the lower of said sembuprights being pivotally attached at its lower end to said stand and having its upper end located at a level lower than the upper end of said lower hand-rail, and the upper of said semi-uprights being arranged sub stantially vertically and being pivotally attached at its base to the top of said lower semi-upright by means of a pin arranged substantially parallel to said handrails; telescopic bar arranged substantially horizontally pivotally connecting .said upright of said lower handrail and being fixedly connected to said upper semi-upright of the adjacent inclinable upright of said upper handrail.
  • each of the at least one lower semiupright is pivotally attached to said stand by means of a simple pin.
  • each of the at least one lower semiupright is pivotally attached to the stand by means of a double pivot comprising a first member pivoted by means of a first pin to the stand, and a second member pivoted by means of a second pin to said first member, said second member being fixedly attached to the lower end of said lower semi-upright.
  • Adjustable asymmetric bars in accordance with claim 1 wherein said lower handrail upright comprises a lower tube and an upper tube telescoping into said lower tube for slidable movement for adjusting the level of said lower handrail.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Steps, Ramps, And Handrails (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Escalators And Moving Walkways (AREA)
US00396104A 1972-09-25 1973-09-10 Asymmetric bars for use in gymanastics Expired - Lifetime US3851873A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7234464A FR2200751A5 (el) 1972-09-25 1972-09-25

Publications (1)

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US3851873A true US3851873A (en) 1974-12-03

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US00396104A Expired - Lifetime US3851873A (en) 1972-09-25 1973-09-10 Asymmetric bars for use in gymanastics

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US (1) US3851873A (el)
CA (1) CA977787A (el)
DE (1) DE2343406C3 (el)
FR (1) FR2200751A5 (el)
GB (1) GB1397210A (el)
IT (1) IT994607B (el)
NL (1) NL152763B (el)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2878166A1 (fr) * 2004-11-25 2006-05-26 Olivier Miceli Dispositif destine a l'apprentissage d'exercices perilleux, pour la gymnastique sportive, reglable en ecartement avec l'agres de gymnastique tel que la barre fixe ou les barres asymetriques

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2423236A1 (fr) * 1978-04-20 1979-11-16 Nouansport Barres asymetriques
FR3132414A1 (fr) 2022-01-28 2023-08-04 Psa Automobiles Sa Circuit de refroidissement reconfigurable

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE73336C (de) * G. N. KNAUER, Kgl. Postexpeditor, in Lindau, Bayern Hausturngeräth
US1111268A (en) * 1914-05-19 1914-09-22 Fred Medart Mfg Company Gymnasium parallel bars.
US1734664A (en) * 1928-08-10 1929-11-05 Fred Medart Mfg Company Gymnasium parallel bar
US3397882A (en) * 1965-01-29 1968-08-20 Reuther Richard Parallel bars and cable support therefor
US3473801A (en) * 1967-02-27 1969-10-21 Nissen Corp Parallel bar conversion kit
US3486750A (en) * 1967-01-11 1969-12-30 Jerome A Krawitz Uneven parallel bars
US3653658A (en) * 1970-02-12 1972-04-04 William E Robertson Adjustable gymnastic bar supported by a-frames

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE73336C (de) * G. N. KNAUER, Kgl. Postexpeditor, in Lindau, Bayern Hausturngeräth
US1111268A (en) * 1914-05-19 1914-09-22 Fred Medart Mfg Company Gymnasium parallel bars.
US1734664A (en) * 1928-08-10 1929-11-05 Fred Medart Mfg Company Gymnasium parallel bar
US3397882A (en) * 1965-01-29 1968-08-20 Reuther Richard Parallel bars and cable support therefor
US3486750A (en) * 1967-01-11 1969-12-30 Jerome A Krawitz Uneven parallel bars
US3473801A (en) * 1967-02-27 1969-10-21 Nissen Corp Parallel bar conversion kit
US3653658A (en) * 1970-02-12 1972-04-04 William E Robertson Adjustable gymnastic bar supported by a-frames

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2878166A1 (fr) * 2004-11-25 2006-05-26 Olivier Miceli Dispositif destine a l'apprentissage d'exercices perilleux, pour la gymnastique sportive, reglable en ecartement avec l'agres de gymnastique tel que la barre fixe ou les barres asymetriques

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Publication number Publication date
DE2343406B2 (de) 1977-05-12
DE2343406A1 (de) 1974-04-11
FR2200751A5 (el) 1974-04-19
NL152763B (nl) 1977-04-15
DE2343406C3 (de) 1978-09-14
CA977787A (en) 1975-11-11
GB1397210A (en) 1975-06-11
IT994607B (it) 1975-10-20
NL7313140A (el) 1974-03-27

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