US3511089A - Test apparatus for enabling accurate adjustment of the force necessary for releasing safety ski bindings - Google Patents

Test apparatus for enabling accurate adjustment of the force necessary for releasing safety ski bindings Download PDF

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Publication number
US3511089A
US3511089A US695457A US3511089DA US3511089A US 3511089 A US3511089 A US 3511089A US 695457 A US695457 A US 695457A US 3511089D A US3511089D A US 3511089DA US 3511089 A US3511089 A US 3511089A
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United States
Prior art keywords
boot
test apparatus
ski
bindings
force
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Expired - Lifetime
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US695457A
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English (en)
Inventor
Michel Del Pedro
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.)
SCHWEIZERISCHE BERATUNGSSTELLE
SCHWEIZERISCHE BERATUNGSSTELLE fur UNFALLVERHUTUNG BFU
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SCHWEIZERISCHE BERATUNGSSTELLE
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C11/00—Accessories for skiing or snowboarding
    • A63C11/26—Devices for use in mounting ski-bindings to skis, e.g. jigs; Testing or measuring devices specially adapted therefor
    • A63C11/265—Devices for testing or measuring the release force of safety ski bindings

Definitions

  • test apparatus for enabling accurate adjustment of the force necessary for releasing safety ski bindings which includes at least one support means defining a surface lying in a horizontal plane and mounted to be free to move in all horizontal directions. Means are associated with such support means for securing thereto a ski boot held by such bindings to a ski and means are provided for exerting an adjustable and measurable pure torque on the support means while leaving the latter free to move in all horizontal directions.
  • the lateral freeing of the boot from the binding depends not only on the torque M offered by the respective part of the bindings, but also on a resisting moment M which is composed partly of the resistance offered by parts of the bindings that engage the rear of the boot, and partly of the friction between the boot and the upper surface of the ski which friction is usually attributable to the skiers weight and the force with which the bindings press the boot against the ski.
  • An object of the invention is to provide test apparatus for enabling adjustment of the force necessary for releasing safety ski bindings in which there is applied to the boot to free it laterally a pure torque of adjustable and measurable magnitude.
  • a further object of the invention is to provide test apparatus so constructed as to enable adjustment of the bindings including means for applying to the boot to free it in a forward direction an upward force of adjustable and measurable magnitude.
  • this upward force for freeing the boot in the forward direction is applied simultaneously with the pure torque for freeing the boot in the lateral direction
  • a further object is to provide a construction for such test apparatus will enable it to be used in connection with all the various types and constructions of ski bindings which are in use and on the market.
  • FIG. 1 is a side view in section of the test apparatus, with a schematic, isometric illustration of the drive shaft;
  • the test apparatus includes a box-like housing 1 with a detachably fastened cover 2, which incorporates two circular openings 3, of which only one is illustrated.
  • a support plate 4 in the shape of a circular disc, is held more or less precisely coaxial with respect to each opening by means of leaf springs 5, which are secured to the side wall of each opening 3.
  • the support plate 4 is freely movable in all horizontal directions.
  • the underside of each support plate rests upon ball bearings 6, which are located in the groove of a ring or ball-bearing race 7 for each respective opening 3.
  • Each ring 7 incorporates several-cg.
  • rods 8 which extend radially from the ring and project through respective helical openings 9 that are provided in the depending wall of a ring 10 which is L-shaped in cross section and suitably fastened to the underside of the cover 2.
  • One of the rods 8 has a hand grip 8a which projects upwardly in the space between the plate 4 and the edge of the opening 3. The grip enables the ring 7 to be rotated, whereby, in consequence of the helically shaped openings 9, the plate 4 can be raised or lowered.
  • the ski boot X is in part secured to the ski S by a conventional toe iron U, which grips the welt at the toe of the boot and permits a lateral freeing of the boot, and by a heel iron V, Which grips the welt at the boots heel and permits the boot to free itself in a forward direction.
  • the cover 2 is further provided with means 11 and 12, respectively located in front and behind each opening 3, for securely holding the ski S on the cover.
  • Each lever 16 further incorporates a tongue 16a which projects through an opening 4a in the support plate 4 and is acted upon in an upward vertical direction by a cross bar 22, which is mounted intermediate its ends to the upper end of the rod 23 of a piston that operates in a hydraulic cylinder 24.
  • Angle irons 25 mount the latter on the plate 4.
  • Each of the cylinders 24 and 31 is connected to a common pump or to respective pumps that is (are) motor or hand operated, whereby a pressure of adjustable and measurable magnitude can be exerted on the fluid in the cylinder 24 and/or 31.
  • a pressure of adjustable and measurable magnitude can be exerted on the fluid in the cylinder 24 and/or 31.
  • the skier who desires to have the toe and/or heel iron, U and/r V, of his bindings tested stands with his skis S on the top of the cover 2, as shown.
  • the skis are fixed to the cover by the means 11 and 12, and, also as part of the preliminary adjustments, the height of each plate 4 is so adjusted with respect to the thickness of the ski and of the ski boot sole that the clamipng jaws 20 and 21, when the lever 16 is in its horizontal position, are located opposite the boot sole and the tongue 21a of a jaw 21 engages the underside of the heel part of the boot sole.
  • the screws 19 are then turned to clamp each boot between the jaws 20 and 21.
  • the toe iron U is tested and adjusted by operating the cylinder 31, which, together with the lateral arm 27, acts as a torquer that exerts a measurable torque which is proportional to the fiuid pressure on the drive shaft 26.
  • the torque on the shaft is transmitted via the plate 4, levers 16, and jaws 20 and 21 to the soles of the ski boots X. Since the plate 4 and, of course, all members mounted on it are free to move in any horizontal direction, a pure torque is exerted on the boot sole.
  • the magnitude of the force acting on the toe iron U to free the boot laterally can be precisely determined, and is the quotient of the torque mentioned above divided by the spacing between where the toe and heel irons U and V grip the welt.
  • the value of the force at which the toe iron is released (whether inwardly or outwardly, depending on the rotational direction in which the torque is applied) is set in a known manner by adjusting the iron U, in accordance with the skiers physique.
  • the weight of the skier plays no role, since it is automatically taken into account during the test.
  • the testing and adjusting of the heel iron V can be combined with those of the toe iron, or carried out separately.
  • the combining of the two tests is rendered possible by the fact that the means for producing and transmitting the force for raising the rear of the boot and causing release of the heel iron are all mounted on the support plate 4.
  • These means comprise the hydraulic cylinder 24, the cross bar 22, the levers 16, and the rear clamping screws 19 with their jaws 21 and tongues 21a. The operation of these parts does not affect the previously described testing and adjustments of the toe iron U.
  • the force exerted on the heel iron V is equal to that applied to the cross bar 2 by the piston in cylinder 24, multiplied by the distance between the line of application of the two levers 16, and divided by the distance from this axis to where the heel iron V grips the welt.
  • the size of the ski boot will vary, of course, in accordance with the size of the skier, but this will have virtually no affect on the test, provided that the distance from the common axis of rotation of the levers 16 to where the iron V grips the welt is always the same. This provision can be facilitated by marking the upper face of the plate 4, or the top of the cover 2, to indicate the correct position of the ski boot heel.
  • Test apparatus for enabling accurate adjustment of the force necessary for releasing safety ski bindings, inoluding at least one support means defining a horizontal plane and mounted to be free to move in all horizontal directions, means associated with said support means for securing thereto a ski boot held by the bindings to the ski, and means for exerting an adjustable and measurable pure torque on said support means while leaving the latter free to move in all horizontal directions.
  • test apparatus is defined in claim 1, wherein said last-mentioned means includes a drive shaft incorporating two Cardan joints, a torquer for driving said shaft, and a driving hub for connecting said shaft tosaid support means.
  • test apparatus as defined in claim 2, including means for producing and exerting on the boot an adjustable and measurable force for causing release of the boot in a forward direction.
  • test apparatus as defined in claim 3, including two spaced parallel levers located to lie along respective sides of the boot, respective means mounting said levers on said support means to pivot about a common axis, at least one pair of jaws between which the boot is clamped, one of each jaw being mounted on a respective said lever and movable therealong, force producing means, and means incorporated in each said lever for receiving and transmitting the force of said last-mentioned means to cause release of the boot in a forward direction.
  • test apparatus as defined in claim 1, wherein said last-mentioned means includes a flexible shaft, a torquer for driving said shaft, and a driving hub for connecting said shaft to said support means.
  • test apparatus as defined in claim '1, including means for producing and exerting on the boot an adjustable and measurable force for causing release of the boot in a forward direction.
  • test apparatus as defined in claim 6, including two spaced parallel levers located to lie along respective sides of the boot, respective means mounting said levers on said support means to pivot about a common axis, at least one pair of jaws between which the boot is clamped, each jaw of said pair being mounted on a respective lever and movable therealong, force producing means, and means incorporated in each said lever for receiving and transmitting the force of said last-mentioned means to cause release of the boot in a forward direction.
  • test apparatus as defined in claim 7, including a housing, a horizontal cover for said housing, at least one opening in said cover, a horizontal further support means mounted on said cover below said opening, means for raising and lowering said further support means, means associated with said further support means for mounting thereon said support means in said opening for movement in all horizontal directions, and means for resiliently centering said support means in said opening.
  • test apparatus as defined in claim 8, including a depending wall attached to the underside of said cover and at least partly surrounding the periphery of said opening, at least one helical opening in said Wall, a ball bearing race located within the confines of said wall, a plurality of rods extending from said race and projecting through said helical opening for supporting the race, and ball bearings in said race for bearing said support means.
  • each jaw has a tongue which engages the underside of the boot.
  • test apparatus as defined in claim 7, including means for bringing each jaw into and out of engagement with the boot.
  • test apparatus as defined in claim 1, including a housing, a horizontal cover for said housing, at least one opening in said cover, a horizontal further support means mounted on said cover below said opening, means for raising and lowering said further support means, means associated with said further support means for mounting thereon said support means in said opening for movement in all horizontal directions, and means for resiliently centering said support means in said opening.
  • test apparatus as defined in claim 13, including a depending wall attached to the underside of said cover and at least partly surrounding the periphery of said opening, at least one helical opening in said wall, a ball bearing race located within the confines of said wall, a plurality of rods extending from said race and projecting through said helical opening for supporting said race, and ball bearings in said race for hearing said support means.
  • test apparatus as defined in claim 13, including two said openings, one for each ski.
  • test apparatus as defined in claim 13, including means on said cover for securing the ski against movement with respect to said support means.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
US695457A 1967-01-11 1968-01-03 Test apparatus for enabling accurate adjustment of the force necessary for releasing safety ski bindings Expired - Lifetime US3511089A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH35567A CH467082A (de) 1967-01-11 1967-01-11 Verfahren zum individuellen Einstellen der Auslösekräfte an Sicherheits-Skibindungen und Vorrichtung zur Ausführung desselben

Publications (1)

Publication Number Publication Date
US3511089A true US3511089A (en) 1970-05-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
US695457A Expired - Lifetime US3511089A (en) 1967-01-11 1968-01-03 Test apparatus for enabling accurate adjustment of the force necessary for releasing safety ski bindings

Country Status (6)

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US (1) US3511089A (de)
AT (1) AT277026B (de)
CH (1) CH467082A (de)
DE (1) DE1648721B1 (de)
FR (1) FR1554019A (de)
SE (1) SE324311B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686950A (en) * 1969-12-24 1972-08-29 Salomon Georges P J Adjustment of ski bindings

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3988931A (en) * 1975-05-08 1976-11-02 Perryman John S Apparatus and method for measuring muscular strength of lower human extremities

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH394005A (de) * 1962-04-25 1965-06-15 Perren Roman Einrichtung zur Einstellung und Prüfung von Sicherheitsskibindungen
US3222922A (en) * 1961-06-12 1965-12-14 Isaac Peter Ski and boot relative torque indicators
US3228239A (en) * 1961-10-17 1966-01-11 Beausacq Alfred Raymond De Apparatus for measuring the stresses applicable to skier's shoes
US3289472A (en) * 1965-04-22 1966-12-06 Gordon C Lipe Ski binding release checking device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192767A (en) * 1963-04-30 1965-07-06 John O Outwater Torque measuring device for determining the safety of ski foot fastenings

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3222922A (en) * 1961-06-12 1965-12-14 Isaac Peter Ski and boot relative torque indicators
US3228239A (en) * 1961-10-17 1966-01-11 Beausacq Alfred Raymond De Apparatus for measuring the stresses applicable to skier's shoes
CH394005A (de) * 1962-04-25 1965-06-15 Perren Roman Einrichtung zur Einstellung und Prüfung von Sicherheitsskibindungen
US3289472A (en) * 1965-04-22 1966-12-06 Gordon C Lipe Ski binding release checking device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686950A (en) * 1969-12-24 1972-08-29 Salomon Georges P J Adjustment of ski bindings

Also Published As

Publication number Publication date
DE1648721B1 (de) 1971-08-26
CH467082A (de) 1969-01-15
FR1554019A (de) 1969-01-17
SE324311B (de) 1970-05-25
AT277026B (de) 1969-12-10

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