WO1989007965A1 - Dispositif de localisation de ski de neige - Google Patents

Dispositif de localisation de ski de neige Download PDF

Info

Publication number
WO1989007965A1
WO1989007965A1 PCT/AU1989/000091 AU8900091W WO8907965A1 WO 1989007965 A1 WO1989007965 A1 WO 1989007965A1 AU 8900091 W AU8900091 W AU 8900091W WO 8907965 A1 WO8907965 A1 WO 8907965A1
Authority
WO
WIPO (PCT)
Prior art keywords
ski
diaphragm
locating device
acoustic generator
snow ski
Prior art date
Application number
PCT/AU1989/000091
Other languages
English (en)
Inventor
Martin Lee
Simon Hunt
Original Assignee
Martin Lee
Simon Hunt
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 Martin Lee, Simon Hunt filed Critical Martin Lee
Publication of WO1989007965A1 publication Critical patent/WO1989007965A1/fr

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/24—Reminder alarms, e.g. anti-loss alarms
    • 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
    • A63C11/003—Signalling devices, e.g. acoustical or visual

Definitions

  • This invention provides a novel snow ski locating device for locating a loose ski in snow.
  • the present invention provides a simple but reliable device which will enable a loose ski to be readily located by tracing a sound signal emitted from the ski as soon as it becomes loose.
  • a snow ski locating device for locating a loose ski in snow, comprising a battery driven acoustic generator for mounting on a snow ski and switching means adapted in use of the device to hold the acoustic generator in a silent condition when the ski is attached to a ski boot but to switch the acoustic generator to a sound generating condition on separation of the ski from the boot.
  • the switching means may comprise a magnet for attachment to the boot and a magnetic proximity switch electrically connected with the acoustic generator and conditioned by proximity of the magnet to hold the acoustic generator in a silent condition but effective on movement of the magnet out of such proximity to activate the acoustic generator to generate a sound signal.
  • the acoustic generator and magnetic proximity switch may be housed together with a driving battery for the acoustic generator within a hollow casing adapted for attachment to a snow ski.
  • the device may also include a manually actuable means conditionable to deactivate the acoustic generator.
  • the manually actuable means may comprise a second magnet movable manually from a position in proximity with the magnetic proximity switch so as to condition the switch to deactivate the acoustic generator and a remote position in which it does not affect the condition of the proximity switch.
  • Figure 1 is a horizontal cross-section through a sound emitter unit of a device constructed in accordance with the invention
  • Figure 2 is a cross-section on the line 2-2 in Figure i;
  • Figure 3 is a cross-section on the line 3-3 in Figure i;
  • Figure 4 is an electric circuit diagram of the electrical components of the device
  • Figure 5 is a horizontal cross-section through a modified sound emitter device;
  • Figure 6 is a cross-section on the line 6-6 in Figure
  • Figure 7 is an enlarged cross-section of a clapper arm incorporated in the sound emitter device of Figure 5;
  • Figure 8 illustrates an alternative kind of sound emitter unit for a device constructed in accordance with the invention
  • Figure 9 is a plan view of the sound emitter unit illustrated in Figure 8.
  • Figure 10 is a diagrammatic cross-section through the unit illustrated in Figures 8 and 9;
  • FIG 11 is a circuit diagram for the unit illustrated in Figures 8 to 10.
  • Figures 1 to 3 illustrate a sound emitter unit adapted to be attached directly to a ski and to operate in conjunction with a small magnet to be attached to the ski boot with which the ski is engaged for skiing. More specifically, the magnet may be installed under the arch of the foot, or in the heel of the ski boot, and the sound emitting device 11 may be attached directly to the ski at the appropriate position or may be incorporated in the boot attachment mechanism.
  • the emitting device may be attached by any convenient means, for example, by one or more fixing screws or by double sided adhesive tape.
  • the attachment mechanism or binding will generally comprise a flat plate portion to engage the underside of the ski boot and the sound emitter unit may be attached to that plate.
  • Sound emitter unit 11 comprises a casing 12 having a central boss portion 13, a floor portion 14 and an outer cylindrical peripheral wall 15.
  • the casing is closed by an annular lid 16 so as to define a hollow annular interior space 17.
  • the central boss 13 has a screw hole 18 for a screw to hold the annular lid 16 and the casing 12 together.
  • a mounting screw hole 35 is also provided to enable robust attachment of the casing to the ski.
  • the casing is preferably made of a strong plastics material.
  • Cap 16 carries an annular printed circuit board 21 on which there is mounted a reed relay 22, or piezo electric resonator unit 23 and a lithium battery 24, together with resistors and a transistor to complete the electrical circuit as described below.
  • the printed circuit board and the electrical components are thus housed within the casing when the cap 16 is fitted.
  • a small permanent magnet 25 is attached to the floor of the casing and the cap is rotatable on the casing so that the printed circuit board and electrical components can be rotated relative to the casing and therefore relative to permanent magnet 25 by manual manipulation of the cap.
  • the top and edge surfaces of the cap may be moulded or indented to provide finger grips for convenient manual manipulation.
  • the cap body interfaces may be sealed by O rings 26, 27 or by appropriate knife edge or labyrinth seals.
  • Piezo electric sounder unit 23 comprises a conventional piezo disc resonator 31 with a resonant cylinder 32 and acoustic sounding board cap 33. This unit is electrically connected with the reed relay 22, the battery 24, three resistors and a transistor as indicated in the circuit diagram illustrated in Figure 4.
  • the reed relay has a normally ON switch so that the piezo sounder unit will be electrically energized unless the reed relay is activated by proximity of a magnet.
  • the sounder unit may be switched off by rotating the cap so that the reed relay 22 is brought into close proximity with the permanent magnet 25 as illustrated in Figure 1.
  • the reed relay can be moved away from magnet 25 and the sounder unit will then be switched to an operative condition in which the resonator will be energized to emit an acoustic signal unless the reed relay switch is held open by proximity of the boot magnet.
  • the sounder unit will activated to emit a sound signal.
  • the condition of the sounder unit is determined by the position of both the magnet 25 and the boot magnet which is indicated by the number 34 in Figure 4.
  • the circuit may be modified to imcorporate a time delay to prevent emission of annoying sound signals when the ski is removed intentionally and before the cap can be rotated to deactivate the sounder unit.
  • a coupling hole may be provided and may be sealed with a thin polyester (Mylar) film to prevent ingress of water.
  • Figures 5 to 7 illustrate a modification of the sounder unit by which sound may be more loudly generated by employing a clapper mechanism 36 such that the resonant vibrations of a clapper arm 37 can be directly dissipated against the cap 16.
  • the clapper arm can be excited by a piezo plate and the piezo and metal clapper arm assembly can be attached at the base of the clapper arm directly to the cap and spaced to provide the most efficient operation.
  • the free end of the clapper arm is designed so that at its maximum excursion it will hit the cap and so directly and efficiently generate a loud sound in conjunction with the sounding board cap structure.
  • FIGS 8 to 11 illustrate an alternative form of sound generator unit in which the sound generation is accomplished by means of an electro-magnetically driven, fairly rigid, diaphragm 41.
  • Disc 41 may be a stainless steel or titanium disc up to 0.5 mm thick and is made with a centrally located magnetic pole piece 42 through which it is driven by an electro-magnetic driver 43 comprised of a driver pole piece 44 and solonoid coil 45.
  • the electro-magnetic driver and the disc are attached to a mounting structure 46 comprising inner and outer cylinders 47, 48 connected by radial ribs 49.
  • the upper edge of the outer cylinder is attached directly to the periphery of the diaphragm disc.
  • the apparently rigid diaphragm Due to the magnitude of the driving force generated between the diaphragm pole piece and the electro-magnetic driver, the apparently rigid diaphragm is able to be deflected with sufficient oscillatory amplitude to produce an appreciable, external sound pressure level.
  • the diaphragm is made quite rigid in this configuration (to support the heavy point loads that may be impressed upon it in use) covering the diaphragm with snow, ice, water, mud or other such materials only slightly affects the radiated sound pressure level.
  • the electro-magnetic driver assembly can be fitted into the mounting structure and appropriately jigged the required distance from the diaphragm pole piece with a removable spacer or other means.
  • the driver can then be fixed in position by a glue or other attachment means and the spacer and jig removed leaving an extremely robust properly air gapped diaphragm pole piece and driving system assembly which is then free to float within the body of the sound generating unit.
  • the mounting structure forms a sufficiently rigid structure complimented by its high inertia such that actuation of the driver electro-magnet deflects the diaphragm as required rather than wasting energy in less efficient acoustic vibration of other members.
  • the pole piece air gap must not be allowed to vary significantly over the expected useful lifetime of the divide. Increasing the gap significantly reduces the driving force available, which in turn, diminishes the diaphragm's oscillatory amplitude and attenuates the radiated sound pressure level. Decreasing the air gap prevents sufficient diaphragm oscillatory amplitude which will also attenuate the radiated sound pressure level.
  • the diaphragm To prevent permanent distortion of the diaphragm, and hence a possible significant alteration of the pole piece air gap, the diaphragm must not be loaded such that it can be stressed past its elastic limit.
  • the mount ensures the diaphragm is not unduly stressed.
  • the upperside of the mount ribs are recessed very slightly below the level of the diaphragm underside plane, so that if the diaphragm is severely compressed during use, the diaphragm deflects elastically onto a mount rib (or ribs) which, being significantly more rigid than the diaphragm disc, can absorb, or transmit, this force so preventing yield (permanent deformation) of the diaphragm disc.
  • the mount in turn, can be made slightly smaller than the inside of the sound emitter body so that under severe diaphragm load conditions, the bottom surfaces of the mount may contact the body. Then very large loads on the diaphragm can be transmitted right through to the ski with no permanent diaphragm material deformation so still maintaining the narrow air gap required between the magnetic pole pieces upon removal of the diaphragm load.
  • the ON/OFF magnet, electronic components, battery and reed switch fit conveniently between the ribs of the mount via the printed circuit board.
  • the printed circuit board may be attached to the bottom of the mount provided suitable mounting lugs, projecting through holes in the pcb, still allow the mount to transmit force through to the body rather than directly through the printed circuit board.
  • the mount,lugs can be used to both attach the printed circuit board to the mount and as diaphragm force transmitting projections.
  • the diaphragm in this configuration, may move sufficiently that the inductance of the electromagnetic driver system will vary significantly and in sympathy with the diaphragm motion. Also, the inductance may vary significantly, too, in accordance with the flux density of the ferrite (or other) core and diaphragm pole piece(s). In this manner a complex, non-linear, coupled resonant system (ferro-resonant) can be achieved to provide increased sound generation at optimum efficiency. It is further possible to design the system so that one or more mechanical resonances of the diaphragm assembly couple with the electronic resonance (or ferro-resonant) driver configuration.
  • a soft magnetic diaphragm pole piece will produce sound at twice the driven frequency and will produce inductance variations at twice the driving frequency. (The magnetic force attracts the diaphragm pole piece independent of driver polarisation) . If the diaphragm pole piece is permanently magnetised then the diaphragm pole piece will be attracted when the magnetic poles are opposite and repelled when the driver and diaphragm pole pieces are similarly polarised. In this instance, the sound output frequency will be equal to the driving frequency and the inductance variations due to the moving pole piece (diaphragm) will vary at the same frequency.
  • the electronic circuit changes little. Rl becomes the driving inductor solenoid and the piezo element is replaced by the two conventional capacitors illustrated.

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Toys (AREA)

Abstract

Un dispositif de localisation de skis perdus dans la neige, comprend un générateur sonore (23) alimenté par un pile (24), monté sur un ski, ainsi qu'un commutateur (22) destiné à commander le générateur sonore (23). Lorsque le ski est fixé à la botte du skieur le commutateur (22) retient le générateur (23) dans sa position hors-circuit. Lorsque le ski se sépare de la botte du skieur, le commutateur (22) active le générateur sonore (23) afin de faciliter la recherche du ski.
PCT/AU1989/000091 1988-03-04 1989-03-06 Dispositif de localisation de ski de neige WO1989007965A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPI710688 1988-03-04
AUPI7106 1988-03-04

Publications (1)

Publication Number Publication Date
WO1989007965A1 true WO1989007965A1 (fr) 1989-09-08

Family

ID=3772887

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1989/000091 WO1989007965A1 (fr) 1988-03-04 1989-03-06 Dispositif de localisation de ski de neige

Country Status (1)

Country Link
WO (1) WO1989007965A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999043398A1 (fr) * 1998-02-25 1999-09-02 Bruce Chittenden Dispositif de localisation d'appareil de sport
WO2016120567A1 (fr) * 2015-01-28 2016-08-04 In&Motion Dispositif de détection de la perte d'un ski

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2658087A1 (de) * 1976-12-22 1978-07-06 Roland Hasse Vorrichtung fuer skier
DE2700238A1 (de) * 1977-01-05 1978-07-13 Peter M Heckler Ski mit einer sicherheitsbindung
US4140331A (en) * 1976-02-10 1979-02-20 S.A. Des Etablissements Francois Salomon & Fils Sports equipment
DE2736600A1 (de) * 1977-08-13 1979-02-22 Bierlein & Schwarz Ortungshilfsgeraet, insbesondere fuer in schnee verborgene gegenstaende
DE2902823A1 (de) * 1979-01-25 1980-07-31 Mueller Ernst Kg Ski
FR2460691A1 (fr) * 1979-07-10 1981-01-30 Goettmann Francois Dispositifs destines a permettre de retrouver un ski perdu dans la neige
AU7503981A (en) * 1980-09-09 1982-03-18 Winter And Summer Pursuits Ltd. Ski annunciator
US4535322A (en) * 1983-08-01 1985-08-13 Yeski Frederick R Ski theft alarm and runaway ski locator
US4603328A (en) * 1984-08-15 1986-07-29 Donald Larson Ski tracking alarm
FR2593711A1 (fr) * 1986-02-05 1987-08-07 Grosjean Daniel Dis

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140331A (en) * 1976-02-10 1979-02-20 S.A. Des Etablissements Francois Salomon & Fils Sports equipment
DE2658087A1 (de) * 1976-12-22 1978-07-06 Roland Hasse Vorrichtung fuer skier
DE2700238A1 (de) * 1977-01-05 1978-07-13 Peter M Heckler Ski mit einer sicherheitsbindung
DE2736600A1 (de) * 1977-08-13 1979-02-22 Bierlein & Schwarz Ortungshilfsgeraet, insbesondere fuer in schnee verborgene gegenstaende
DE2902823A1 (de) * 1979-01-25 1980-07-31 Mueller Ernst Kg Ski
FR2460691A1 (fr) * 1979-07-10 1981-01-30 Goettmann Francois Dispositifs destines a permettre de retrouver un ski perdu dans la neige
AU7503981A (en) * 1980-09-09 1982-03-18 Winter And Summer Pursuits Ltd. Ski annunciator
US4535322A (en) * 1983-08-01 1985-08-13 Yeski Frederick R Ski theft alarm and runaway ski locator
US4603328A (en) * 1984-08-15 1986-07-29 Donald Larson Ski tracking alarm
FR2593711A1 (fr) * 1986-02-05 1987-08-07 Grosjean Daniel Dis

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999043398A1 (fr) * 1998-02-25 1999-09-02 Bruce Chittenden Dispositif de localisation d'appareil de sport
WO2016120567A1 (fr) * 2015-01-28 2016-08-04 In&Motion Dispositif de détection de la perte d'un ski

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