US3414283A

US3414283A - Device for adjusting the safety opening of magnetic attachments for ski

Info

Publication number: US3414283A
Application number: US558652A
Authority: US
Inventors: Georges P J Salomon
Original assignee: Individual
Current assignee: Individual
Priority date: 1965-06-25
Filing date: 1966-06-20
Publication date: 1968-12-03
Anticipated expiration: 1985-12-03
Also published as: DE1578889B2; FR1448333A; DE1578889A1

Description

Dec. 3, 1968 G. P. .1. SALOMON 3,414,233

DEVICE FOR ADJUSTING THE SAFETY OPENING OF MAGNETIC ATTACHMENTS FOR SKI 5 Sheet -Sheet 1 Filed June 20,

Fig:7

INVENTOR.

Dec. 3, 1968 G. P. J. SALOMON 3,414,283

DEVICE FOR ADJUSTING THE SAFETY OPENING OF MAGNETIC ATTACHMENTS FOR SKI Filed June 20, 1966 3 Sneets-Sneet WI I/ I I04 I07 I01 105 106 102 108 I \I v/ 122 I21 123 126 127 I28 I24 I26 I27 I25 I23 Dec. 3, 1968 G. P. J. SALOMON 3,414,283

DEVICE FOR ADJUSTING THE SAFETY OPENING OF MAGNETIC ATTACHMENTS FOR SKI Filed June 20, 1966 5 Sheets-Sheet 5 Flg=16 a 1 19.17 Lb s FigrZO I NVEN TOR.

United States Patent 4 Claims. oi. 28011.35)

ABSTRACT OF THE DISCLOSURE A setting device for the safety opening of a magnetic attachment for ski in which the setting is obtained in modifying the ratio between the stress on the ski boot and the pull of the magnetic element.

The instant invention relates to a device for the adjustment of the safety opening of a magnetic attachment for ski.

Magnetic safety attachments for skis are known in which the adjustments thereof are obtained merely by changing the point of application of the force of the magnet on a lever supporting it and receiving the abnormal thrust applied by the boot of the user.

This adjusting means, however, is rather uncertain and if the mechanism is housed in a casing, the latter must be removed. Also, the amount of adjustment permitted is often small and the mass, weight and volume of the movable members of the device are notable.

The present invention proposes to overcome these disadvantages in a simple and efficient manner.

An object of the instant invention is to obtain an adjustment of the safety opening of magnetic attachments for skis by variation of the ratio existing between the thrust exerted by the boot and the magnetic holding force, to permit obtaining the opening of the attachment for various values of the thrust exerted by the said boot, that is, more specifically to cause variation in the torque necessary for this opening.

To this end, the invention provides for various embodirnents allowing variation of this torque which is obtained by changing the ratio of application of the magnetic thrust, by a more or less important use of the magnetic flux of at least one magnet, by arrangement of mechanical means the adjustable forces of which adding or subtracting from the strength of this magnet, or still, by the combination of these means.

The invention will be best understood with reference to the appended drawing and the following description having reference to non-limitative embodiments:

FIGURES 1 and 2 are longitudinal cross-sectional views of an embodiment of the invention comprising a magnet adjustable on a lever and lying on a keeper;

FIGURE 3 is a longitudinal cross-sectional view of an embodiment of the invention comprising a magnet adjustable on a threaded screw and supporting a slide bar;

FIGURE 4 is a longitudinal cross-sectional view of an embodiment of the invention comprising a magnet resting on a movable slotted keeper;

FIGURE 5 is a longitudinal cross-sectional view of an embodiment of the invention comprising a magnet resting on a partly magnetic keeper;

FIGURES 6, 7 and 8 are plan views of the devices illustrated in FIGURES 4 and 5;

FIGURES 9, 10, 11 and 12 are longitudinal cross-sectional views of other embodiments of the device according to the invention;

FIGURE 13 is a cross-sectional view of an adjustable device according to the invention, acting by variation of the magnetic flux;

FIGURE 14 is a longitudinal cross-sectional view according to line XIV--XIV of FIGURE 15;

FIGURE 15 is a lateral cross-sectional view according to line XVXV of FIGURE 14;

FIGURE 16 is a front view in longitudinal crosssection of an adjusting device with compression spring having an additional action;

FIGURE 17 is a front view in longitudinal cross-section of an adjusting device with compression spring having a differential action;

FIGURE 18 is a front view in longitudinal cross-section of an adjusting device with tension spring giving an additional action;

FIGURE 19 is a frontal view in longitudinal cross-section of an adjusting device with a traction spring having a differential action;

FIGURE 20 is a front view in longitudinal cross-section of an adjusting device with differential action according to still another embodiment of the invention.

In FIGURE 1, the magnet 1 slides on the lever 2, the end 4 of which is connected directly or not to the jaw holding the boot of the user. The magnet lies on a keeper 3 solid with ski 5. The magnet is limited in adjustment by the abutment 6 and can be locked by the screw 7.

In FIGURE 2, the magnet 11 is held locked on the casing 12 by a clamping screw 13 extending across an elongated slot 14 allowing adjustment thereof, the said magnet lying over a keeper 15 as an extension of lever 16.

In FIGURE 3, the magnet 21 slides on slide-bars 22 solid with ski 5 by rotation of the operating screw 23', the keeper 24 being an extension of the lever 25.

In FIGURE 4, the magnet 31 is solid with the lever 32 and rests on a keeper 33 having a slot 34 and a nut 35 which, during operation of the screw 37, allows the said keeper 32 to slide longitudinally on the sliding members 36 solid with the ski 5 and to more or less locate the said slot beneath the magnet thus ensuring, through variation in the bearing surfaces in contact, the adjustment of the holding torque of the device.

In FIGURE 5, the magnet 41 which is fast with the lever 42 rests on a movable keeper made up of two parts one of which 43 is magnetic and the other 44 is permeable to the flux of the said magnet.

These two parts are joined by a nut 45 which, through rotation of the screw 46, longitudinally displaces the said keeper on the slide members 47 to more or less vary the amount of non-magnetic surface covered by the said magnet and, thus, the adjustment of the holding torque of the device by variation in the resistance of the magnetic circuit.

In FIGURE 6 are illustrated the shape of the keeper 33 and, in dotted lines, the extreme positions taken by the magnet; position 51 where the bearing surface between the latter and the keeper is nil and, consequently, the force of the latter is also nil, position allowing easy deharnessing of the boot; position 52 where the bearing surface between the keeper and the magnet is complete and, consequently, the force of attraction of the latter is maximum.

In FIGURE 7 are also illustrated the

positions

61 and 62 of the magnet, positions corresponding to the nonmagnetic and

magnetic bearing surfaces

43 and 44 of the keeper allowing, by longitudinal sliding of the said keeper, variation in the holding torque of the device going from a maximum to zero.

FIGURE 8 illustrates the two

extreme positions

71 and 72 of the magnet on the non-magnetic and

magnetic portions

73 and 74 defining an oblique joint that permits a more accurate adjustment of the mechanism.

In FIGURE 9, the magnet is made up of two

polar masses

81, 82 in contact with the keeper 83 solid or fast with the lever 84 and the magnetic circuit of which is closed by a movable counter-plate 85 the magnetic portion of which during sliding over slide-members 86 through rotation of the operating screw 87 through nut 88 gives more or less resistance to the magnetic circuit of the mechanism and, consequently, adjusts the holding torque of the latter.

In FIGURE 10, the magnet 91 slides on the lever 92, a locking screw 93 holding it in position on the latter. The said magnet rests on a second magnet 94 secured on the ski and acting as a keeper.

In FIGURE 11, the magnet 101 which slides on the lever 102 is held on the latter by the abutment 103 the end 104 of which is fast directly or indirectly to the jaw receiving the boot of the skier. This magnet which is retained in position by the screw 105 rests on a second magnet 106 sliding on the slide members 107 solid with ski 5 through rotation of the operating screw 108. This latter device allows two types of adjustment.

In FIGURE 12, the keeper 131 is solid or fast with lever 132 resting on magnet 133 through the sliding plate 134 the

magnetic portions

136 and 137 of which more or less decrease the sections of magnetic flux flow of the said magnet according to the movement of the plate 134 in the direction of arrow 138. A non-magnetic portion 139 separates the said counter-plate 134 into two poles in order to avoid short-circuiting of the magnetic flux of the said magnet.

In FIGURE 13, the magnetic flux flowing through magnet 111 according to arrow 112 must fiow through the rotating pin 113 having

non-magnetic portions

114 and 115 which, during rotation thereof according to arrow 116 of said pin, allows the variation from maximum to zero of the flux flowing through the said magnet. A quarter of a turn of the said pin is sufficient to provide all of the adjustments.

In FIGURE 14, the magnet 121 that receives the keeper 122 is formed with two sliding grooves 123 provided on two

poles

124 and 125, the said groove receiving a plate 126 covered at the upper surface thereof with a nonmagnetic sheath 127. Plate 126 is introduced according to arrow 128 between the two poles of the said magnet, the latter plate more or less short-circuiting the magnetic circuit of the magnet depending on how much it has been moved along the grooves 123.

FIGURE illustrates the sliding grooves 123 provided on the two

poles

124 and 125 of the said magnet and the arrangement of the non-magnetic sheath 127 that prevents the said plate from communicating to the keeper the magnetic flux that it absorbs.

In FIGURE 16, the jaw 1-61 transmits the abnormal thrusts to the beak 162 of a lever 163 fast with the keeper 164. The latter can only move away from the magnet 165 if the thrust that it receives is sufficient to overcome the strength of a compression spring 166 located in a casing 167 of the lever 163 and the compression of which is adjustable by the screw 168 of the casing 169.

In FIGURE 17, the abnormal stresses transmitted by

levers

172 and 173 to the keeper 171 tend to separate the said breech from the magnet 174, this separation being more or less facilitated by the action of a compression spring 175 bearing, on the one hand, in a housing 176 of the lever 173 and, on the other hand, in a threaded sleeve 177 threaded on the casing 178 fast with the ski 179. The sleeve ensures the adjustment of the device.

In FIGURE 18, the

levers

181 and 182 transmit to the keeper 183 the abnormal stresses which tend to separate the latter from the magnet 184. This separation is more or less counteracted by a tension spring 185, the riveted end 187 of which pivots on a lug 186 of the lever 182 and the opposite end of which is secured to a screw 188 mounted on the casing 189 to ensure adjustment of the releasing torque of the device.

In FIGURE 19, the lever 191 transmits the abnormal thrusts to lever 192 which tends to separate the keeper 193 with which it is solid, from magnet 194. This separation is facilitated by a tension spring 195 pivotally mounted on the end 196 of the lever 192 and secured on a screw 199 mounted on the casing 198. The latter screw ensures adjustment of the holding torque of the device.

In FIGURE 20, a spring 201 tends to separate the keeper 203 from the magnet 202. The action of spring 201 is adjustable by the operating screw 204 causing displacement of a nut 205 slidable over slide members 206 of a casing 207. One end of the said spring 201 is fixed to the said nut while the opposite end is held, not by the magnet, the breech or the casing, but on a cam 208 solid with the lever 209 supporting the jaw that holds the boot on the ski 210.

Many changes can be made to the shape, color, dimensions and proportions of the various component parts of the present invention without departing from the scope thereof, the said parts susceptible of being obtained in various materials or combinations of materials capable of withstanding any treatments.

Besides, the various adjusting systems, above described, can be used either alone or simultaneously, on all attachments, on all skis and be combined with other adjustment devices, flexibility or safety devices without for that being outside the scope of the present invention.

I claim:

1. In a device for the adjustment of the safety opening of a magnetic attachment for ski, the combination comprising:

(a) a magnet member;

(b) a magnetizable keeper member mounted on the ski;

(c) a boot attachment including an operating jaw movable for releasing said boot from said attachment upon said boot being subjected to a force of a predetermined magnitude, the said jaw having a projecting lever on which said magnet member is secured; (d) means mounting one of said members on said ski and further means mounting the other member on said jaw whereby said members may be separated upon application on said jaw of a force greater than a said predetermined magnitude; and

(e) means to adjust the relative overlap position of said members to adjust the force therebetween resisting said predetermined force, the said adjusting means comprises means to slidably displace said keeper member on said ski relative to said magnet member and means defining on said keeper member magnetic and non-magnetic areas.

2. In a device for the adjustment of the safety opening of a magetic attachment for ski, the combination comprising:

(a) a magnet member fixed to said ski;

(b) a magnetizable keeper member consisting of a pivotable lever projecting from a jaw and movable to and from said ski;

(c) a boot attachment including said jaw movable for releasing said boot from said attachment upon said boot being subjected to a force of a predetermined magnitude;

(d) means mounting one of said members on said ski and further means mounting the other member on said jaw whereby said members may be separated upon application on said jaw of a force greater than said predetermined magnitude; and

(e) means to adjust the relative overlap position of said members to adjust the force therebetween resisting said predetermined force, the said adjusting means consisting of a plate having portions of magnetic material and portions of non-magnetic material slidably displaceable between said magnet member and said keeper member.

3. In a device for the adjustment of the safety opening of a magnetic attachment for ski, the combination comprising:

(a) a magnet member fixed to said ski;

(b) a magnetizable keeper member consisting of a pivotable lever projecting from an operating jaw and movable to and from said magnet member;

(d) means mounting one of said members on said ski and further means mounting the other member on said jaw whereby said members may be separated. upon application on said jaw of :a force greater than said predetermined magnitude; and

(e) means to adjust the relative overlap position of said members to adjust the force therebetween resisting said predetermined force, the said adjusting means consisting of a precompressed adjustable spring biasing said keeper member against said magnet memher.

4. In a device for the adjustment of the safety opening of a magnetic attachment for ski, the combination comprising:

(a) a magnet member fixed to the ski;

(c) a boot attachment including the said operating jaw upon said boot being subjected to a force of a predetermined magnitude;

(e) means to adjust the relative overlap position of said members to adjust the force therebetween re- SiSting said predetermined force, the said adjusting means consisting of a pretensioned adjustable spring biasing said keeper member away from said magnet member.

References Cited UNITED STATES PATENTS 2,276,826 3/ 1942 Crowther. 3,165,328 1/1965 Malone. 3,246,907 4/ 1966 Chisholm. 3,251,607 5/1966 Wren.

FOREIGN PATENTS 1,387,319 12/1964 France.

LEO FRIAGLIA, Primary Examiner.

movable for releasing said boot from said attachment MILTON SMITH, Assistant Examine"-