WO1992009508A1 - Method and device for detecting household metal objects in household refuse to be removed - Google Patents

Method and device for detecting household metal objects in household refuse to be removed Download PDF

Info

Publication number
WO1992009508A1
WO1992009508A1 PCT/NL1991/000244 NL9100244W WO9209508A1 WO 1992009508 A1 WO1992009508 A1 WO 1992009508A1 NL 9100244 W NL9100244 W NL 9100244W WO 9209508 A1 WO9209508 A1 WO 9209508A1
Authority
WO
WIPO (PCT)
Prior art keywords
refuse
holder
metal
warning signal
household
Prior art date
Application number
PCT/NL1991/000244
Other languages
French (fr)
Inventor
Cees-Jan Van Galen
Johannes De Jonge
Original Assignee
Galen Cees Jan Van
Johannes De Jonge
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 Galen Cees Jan Van, Johannes De Jonge filed Critical Galen Cees Jan Van
Priority to EP92900562A priority Critical patent/EP0558605B1/en
Priority to DE69107475T priority patent/DE69107475T2/en
Publication of WO1992009508A1 publication Critical patent/WO1992009508A1/en
Priority to GR950400682T priority patent/GR3015606T3/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
    • B65F1/00—Refuse receptacles; Accessories therefor
    • B65F1/14—Other constructional features; Accessories
    • B65F1/1426—Housings, cabinets or enclosures for refuse receptacles
    • B65F1/1431—Housings, cabinets or enclosures for refuse receptacles having a waste disposal chute integrally connected to a work top or the like, the refuse receptacle remaining static
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
    • B65F1/00—Refuse receptacles; Accessories therefor
    • B65F1/14—Other constructional features; Accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
    • B65F2210/00—Equipment of refuse receptacles
    • B65F2210/152—Material detecting means
    • B65F2210/1525—Material detecting means for metal

Definitions

  • the invention relates to a method and a device for detecting, at or close to the place of use such as a house or catering establishment, household metal objects such as forks, knives, spoons and the like in household refuse to be removed by guiding the household refuse past metal detecting means and generating a warning signal in the presence of a metal object.
  • a device for detecting metal objects in refuse is known from US-4,742,339.
  • the device comprises a refuse bin and a metal detecting ring mounted thereon. The moment a metal object passes the ring an alarm goes off so that the object can be retrieved from the refuse bin.
  • the drawback to this system is that if the alarm is not noticed the metal object will still disappear into the refuse. This is in addition an unpleasant task for the person who has to retrieve the object from the refuse, particularly when the refuse bin is very full.
  • the object of the present invention is to provide a method for detecting metal objects in refuse with which the above-mentioned drawbacks are avoided. This is achieved by the invention in that the refuse discharge is interrupted when a warning signal is generated. By interrupting the refuse discharge metal objects will be unable to still disappear into the refuse. A metal object will not end up deep in the refuse bin, whereby retrieving the object from the refuse becomes very much less unpleasant.
  • the refuse is preferably fed to a holder and a discharge opening for the refuse is only opened when there is no warning signal and the holder is almost completely full.
  • the relatively limited contents of the holder simpli ⁇ fies recovery of the object. When no object is present in the holder the refuse discharge is continued normally.
  • a device for performing the method according to the invention preferably comprises means for discharging refuse; metal detecting means for detecting metal objects in the refuse; and means connected thereto for generating a warning signal
  • the discharge means further comprise a holder for temporary storage of refuse, which holder is provided with a discharge opening closed off by closing members and is connected to means for detecting an almost completely filled holder and to the means for gene- rating a warning signal in such a manner that the closing member can only be opened when the holder is almost com ⁇ pletely filled and in the absence of a warning signal.
  • the metal detecting means can be based on any suitable metal detecting system. Use is preferably made however of magnetometry.
  • magnetometry is that disposable non-ferrous metal articles such as alumi ⁇ nium coffee milk containers are not detected. Only the ferrous objects are detected. In most cases these are precisely the objects which should not be thrown away with the refuse.
  • the metal detecting means are formed by a modified version of the coil of a so-called "flux valve" compass.
  • the coil is a detector which generates an electrical signal the ampli- tude and phase of which are proportional to the amplitude and orientation of the external magnetic field acting along its axis. This external magnetic field will often be the magnetic field of the earth.
  • the operation of the modified coil in the present invention is based on amplifying a variation in the electrical signal, which variation occurs when a ferrous object is held in the vicinity of the coil.
  • the objects for detection are preferably stored when not in use in the vicinity of one or more magnets whereby the objects become magnetic and can cause a still better detectable variation of the coil.
  • an electronic signal is likewise transmitted to the closing members whereby these remain closed. It will only be possible to operate the closing members of the discharge opening when the metal objects present have been removed from the re ⁇ fuse. After the removal of detected metal objects the closing members are preferably opened by means of manual operation, in the form for example of a pulse contact. When the bin is full and in the absence of metal objects, open ⁇ ing takes place automatically by the means for determining the refuse level in the holder.
  • the holder can for instance be received in a work surface.
  • the placing of the metal detecting means may vary.
  • the means can be arranged in the closing members or in the work surface along the edge of the holder.
  • the closing members are preferably provided with one or more scrapers for optimal removal of refuse from the members.
  • fig. 1 shows a partially broken away perspective view of a preferred embodiment of a device according to the present invention
  • fig. 2 shows a perspective view of a second em ⁇ bodiment of the invention.
  • Fig. 1 shows a work surface 1 in which a holder 2 is accommodated.
  • the discharge opening 3 of the holder 2 is closed by two closing members 4 mutually connecting at an angle and hingeably joined to the walls 5 of the holder 2.
  • the closing members 4 comprise metal detecting means 6.
  • Situated in the holder 2 is a quantity of refuse 7 having therein a metal object 8.
  • the sensors 9 detect that the holder is almost completely filled.
  • the holder 2 is situ ⁇ ated above a large refuse bin 10 which in turn can be placed in a cupboard 11 under the work surface l. In ano ⁇ ther embodiment the holder can optionally be mounted onto a refuse bin.
  • the sensors 9 detect that the holder 2 is almost full.
  • a time threshold during which the sen- sors must detect an almost completely filled holder before the closing members are opened.
  • a signal 12 thereof is transmitted to a processing unit 13.
  • the proces ⁇ sing unit 13 checks whether metal objects are still situa ⁇ ted in the refuse. When this is not the case a signal 15 passes to the control mechanisms 16 of the closing members 4, whereby the discharge opening 3 is opened and the refuse 7 disappears into the large refuse bin 10.
  • the control mechanisms 16 of the closing members 4 are blocked and the discharge opening 3 remains closed.
  • Figure 2 shows a second embodiment of a device according to the invention.
  • the refuse is supplied from the direction of the arrows 17.
  • second metal detecting means 18 Situated along the edge of the holder 2 are a number of second metal detecting means 18. At the moment a metal object passes the second metal detec ⁇ ting means 18 a warning signal is generated.
  • the advantage of this construction is that it can be determined relative ⁇ ly quickly whether a metal object has found its way into the holder, whereby this object can be removed quickly and does not have to be fished out of a large quantity of refuse.
  • a metal object nevertheless finds its way into the holder and is not removed therefrom, it is still detec ⁇ ted by the first metal detecting means 6.
  • These first metal detecting means prevent the closing members 4 of the holder 2 being opened.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Processing Of Solid Wastes (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Sorting Of Articles (AREA)
  • Refuse Collection And Transfer (AREA)
  • Refuse Receptacles (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The invention relates to a method and a device for detecting, at or close to the place of use such as a house or catering establishment, household metal objects such as forks, knives, spoons and the like in household refuse to be removed by guiding the household refuse past metal detecting means and generating a warning signal in the presence of a metal object.

Description

METHOD AND DEVICE FOR DETECTING HOUSEHOLD METAL OBJECTS IN HOUSEHOLD REFUSE TO BE REMOVED
The invention relates to a method and a device for detecting, at or close to the place of use such as a house or catering establishment, household metal objects such as forks, knives, spoons and the like in household refuse to be removed by guiding the household refuse past metal detecting means and generating a warning signal in the presence of a metal object.
Particularly in restaurants and hotels large quantities of cutlery disappear into the refuse annually. This naturally involves high costs. A way of detecting the cutlery in the refuse is therefore desirable.
A device for detecting metal objects in refuse is known from US-4,742,339. The device comprises a refuse bin and a metal detecting ring mounted thereon. The moment a metal object passes the ring an alarm goes off so that the object can be retrieved from the refuse bin. The drawback to this system is that if the alarm is not noticed the metal object will still disappear into the refuse. This is in addition an unpleasant task for the person who has to retrieve the object from the refuse, particularly when the refuse bin is very full.
The object of the present invention is to provide a method for detecting metal objects in refuse with which the above-mentioned drawbacks are avoided. This is achieved by the invention in that the refuse discharge is interrupted when a warning signal is generated. By interrupting the refuse discharge metal objects will be unable to still disappear into the refuse. A metal object will not end up deep in the refuse bin, whereby retrieving the object from the refuse becomes very much less unpleasant.
The refuse is preferably fed to a holder and a discharge opening for the refuse is only opened when there is no warning signal and the holder is almost completely full. The relatively limited contents of the holder simpli¬ fies recovery of the object. When no object is present in the holder the refuse discharge is continued normally. A device for performing the method according to the invention preferably comprises means for discharging refuse; metal detecting means for detecting metal objects in the refuse; and means connected thereto for generating a warning signal, wherein the discharge means further comprise a holder for temporary storage of refuse, which holder is provided with a discharge opening closed off by closing members and is connected to means for detecting an almost completely filled holder and to the means for gene- rating a warning signal in such a manner that the closing member can only be opened when the holder is almost com¬ pletely filled and in the absence of a warning signal.
The metal detecting means can be based on any suitable metal detecting system. Use is preferably made however of magnetometry. The advantage of magnetometry is that disposable non-ferrous metal articles such as alumi¬ nium coffee milk containers are not detected. Only the ferrous objects are detected. In most cases these are precisely the objects which should not be thrown away with the refuse.
In a preferred embodiment of the invention the metal detecting means are formed by a modified version of the coil of a so-called "flux valve" compass. The coil is a detector which generates an electrical signal the ampli- tude and phase of which are proportional to the amplitude and orientation of the external magnetic field acting along its axis. This external magnetic field will often be the magnetic field of the earth. The operation of the modified coil in the present invention is based on amplifying a variation in the electrical signal, which variation occurs when a ferrous object is held in the vicinity of the coil.
For optimum operation of the modified coil the objects for detection are preferably stored when not in use in the vicinity of one or more magnets whereby the objects become magnetic and can cause a still better detectable variation of the coil.
When a warning signal is generated an electronic signal is likewise transmitted to the closing members whereby these remain closed. It will only be possible to operate the closing members of the discharge opening when the metal objects present have been removed from the re¬ fuse. After the removal of detected metal objects the closing members are preferably opened by means of manual operation, in the form for example of a pulse contact. When the bin is full and in the absence of metal objects, open¬ ing takes place automatically by the means for determining the refuse level in the holder. The holder can for instance be received in a work surface. The placing of the metal detecting means may vary. The means can be arranged in the closing members or in the work surface along the edge of the holder. The closing members are preferably provided with one or more scrapers for optimal removal of refuse from the members.
When not in use, the holder can optionally be closed off by means of a cover. Further details and features will be elucidated in the annexed drawings, in which: fig. 1 shows a partially broken away perspective view of a preferred embodiment of a device according to the present invention; and fig. 2 shows a perspective view of a second em¬ bodiment of the invention.
Corresponding reference numerals refer to cor¬ responding components.
Fig. 1 shows a work surface 1 in which a holder 2 is accommodated. The discharge opening 3 of the holder 2 is closed by two closing members 4 mutually connecting at an angle and hingeably joined to the walls 5 of the holder 2. The closing members 4 comprise metal detecting means 6. Situated in the holder 2 is a quantity of refuse 7 having therein a metal object 8. The sensors 9 detect that the holder is almost completely filled. The holder 2 is situ¬ ated above a large refuse bin 10 which in turn can be placed in a cupboard 11 under the work surface l. In ano¬ ther embodiment the holder can optionally be mounted onto a refuse bin.
In the situation shown the sensors 9 detect that the holder 2 is almost full. To prevent the closing members opening every time refuse passes over the sensors there will preferably be a time threshold during which the sen- sors must detect an almost completely filled holder before the closing members are opened. A signal 12 thereof is transmitted to a processing unit 13. On the basis of sig- nals 14 coming from the metal detecting means 6 the proces¬ sing unit 13 checks whether metal objects are still situa¬ ted in the refuse. When this is not the case a signal 15 passes to the control mechanisms 16 of the closing members 4, whereby the discharge opening 3 is opened and the refuse 7 disappears into the large refuse bin 10. When however the metal detecting means 6 generate a signal 14 that metal is still to be found in the refuse, the control mechanisms 16 of the closing members 4 are blocked and the discharge opening 3 remains closed.
Figure 2 shows a second embodiment of a device according to the invention. The refuse is supplied from the direction of the arrows 17. Situated along the edge of the holder 2 are a number of second metal detecting means 18. At the moment a metal object passes the second metal detec¬ ting means 18 a warning signal is generated. The advantage of this construction is that it can be determined relative¬ ly quickly whether a metal object has found its way into the holder, whereby this object can be removed quickly and does not have to be fished out of a large quantity of refuse. When a metal object nevertheless finds its way into the holder and is not removed therefrom, it is still detec¬ ted by the first metal detecting means 6. These first metal detecting means prevent the closing members 4 of the holder 2 being opened.
*****

Claims

1. Method for detecting, at or close to the place of use such as a house or catering establishment, household metal objects such as forks, knives, spoons and the like in household refuse to be removed by guiding the household refuse past metal detecting means and generating a warning signal in the presence of a metal object characterized in that the refuse discharge is interrupted when a warning signal is generated.
2. Method as claimed in claim 1, characterized in that the refuse is supplied to a holder and that a dis¬ charge opening for the refuse is opened only in the absence of a warning signal and when the holder is almost complete¬ ly filled.
3. Device for performing a method as claimed in any of the preceding claims, comprising means for discharg¬ ing refuse; metal detecting means for detecting metal objects in the refuse; and means connected thereto for generating a warning signal, characterized in that the discharge means further comprise a holder for temporary storage of the refuse, which holder is provided with a discharge opening closed off by closing members and is connected to means for detecting an almost completely filled holder and to the means for generating a warning signal in such a manner that the closing member can only be opened when the holder is almost completely filled and in the absence of a warning signal.
4. Device as claimed in claim 3, characterized in that the holder is received in a work surface.
5. Device as claimed in claim 3 or 4, character- ized in that the metal detecting means are incorporated in the closing members.
6. Device as claimed in claim 3 or 4, character¬ ized in that the metal detecting means are incorporated in the work surface along the edge of the holder.
7. Device as claimed in any of the claims 3-6, characterized in that the holder is closed off by means of a cover.
8. Device as claimed in any of the claims 3-7, characterized in that the closing member is provided with scrapers for removing residual refuse therefrom.
9. Device as claimed in any of the claims 3-8, characterized in that the metal detecting means are formed by a modified version of the coil of a so-called "flux valve" compass.
10. Device as claimed in claim 9, characterized in that the coil is modified such that in the presence of a metal object the variation which occurs in the electrical signal of the coil is amplified.
*****
PCT/NL1991/000244 1990-11-30 1991-11-29 Method and device for detecting household metal objects in household refuse to be removed WO1992009508A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP92900562A EP0558605B1 (en) 1990-11-30 1991-11-29 Method and device for detecting household metal objects in household refuse to be removed
DE69107475T DE69107475T2 (en) 1990-11-30 1991-11-29 METHOD AND DEVICE FOR PERCEIVING METAL HOUSEHOLD EQUIPMENT IN HOUSEHOLD WASTE TO BE DISCHARGED.
GR950400682T GR3015606T3 (en) 1990-11-30 1995-03-23 Method and device for detecting household metal objects in household refuse to be removed.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9002633A NL9002633A (en) 1990-11-30 1990-11-30 METHOD AND APPARATUS FOR DETECTING HOUSEHOLD METAL OBJECTS IN HOUSEHOLD WASTE
NL9002633 1990-11-30

Publications (1)

Publication Number Publication Date
WO1992009508A1 true WO1992009508A1 (en) 1992-06-11

Family

ID=19858066

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1991/000244 WO1992009508A1 (en) 1990-11-30 1991-11-29 Method and device for detecting household metal objects in household refuse to be removed

Country Status (9)

Country Link
EP (1) EP0558605B1 (en)
AT (1) ATE118440T1 (en)
AU (1) AU9079291A (en)
DE (1) DE69107475T2 (en)
DK (1) DK0558605T3 (en)
ES (1) ES2068023T3 (en)
GR (1) GR3015606T3 (en)
NL (1) NL9002633A (en)
WO (1) WO1992009508A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2696262A1 (en) * 1992-09-30 1994-04-01 Nord Inox Srl Device for checking and counting cutlery or other metallic objects for tableware cleaning counters.
US5576621A (en) * 1994-03-10 1996-11-19 Denver Dynamics, Inc. Hinged metal detection cover for a receptacle
NL1018955C2 (en) * 2001-09-14 2003-03-17 Arsis Ind Design Removal device for cutlery in waste destined for a dustbin, comprises dustbin cover with sensors used to fix cover in closed position if cutlery is detected
FR2866121A1 (en) * 2004-02-11 2005-08-12 Europ Distrib Materiel Abrevat Metallic detector for use at e.g. restaurant, has passage including funnel shaped input connected to horizontal tube made of shock absorbing material, and closing unit provided to close passage
JP2017035502A (en) * 2008-05-30 2017-02-16 ストライカー・コーポレイション Waste collection system for collecting solid medical waste including bag-tensioning mechanism

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113443294A (en) * 2021-06-29 2021-09-28 中科深兰(福建)环境科技有限责任公司 Solid useless portable equipment for detection

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3015952A1 (en) * 1980-04-25 1981-11-05 Blanc Gmbh & Co, 7519 Oberderdingen Work-top for sink units - has drop-down waste slops section interacting with waste bin beneath
US4494657A (en) * 1982-12-17 1985-01-22 Jerry Oldenkamp Integral housing member for removing magnetic articles from a flow of loosely packed material and method
US4742339A (en) * 1986-09-10 1988-05-03 Nelson Baziuk Cutlery detector and alarm

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3015952A1 (en) * 1980-04-25 1981-11-05 Blanc Gmbh & Co, 7519 Oberderdingen Work-top for sink units - has drop-down waste slops section interacting with waste bin beneath
US4494657A (en) * 1982-12-17 1985-01-22 Jerry Oldenkamp Integral housing member for removing magnetic articles from a flow of loosely packed material and method
US4742339A (en) * 1986-09-10 1988-05-03 Nelson Baziuk Cutlery detector and alarm

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2696262A1 (en) * 1992-09-30 1994-04-01 Nord Inox Srl Device for checking and counting cutlery or other metallic objects for tableware cleaning counters.
US5576621A (en) * 1994-03-10 1996-11-19 Denver Dynamics, Inc. Hinged metal detection cover for a receptacle
NL1018955C2 (en) * 2001-09-14 2003-03-17 Arsis Ind Design Removal device for cutlery in waste destined for a dustbin, comprises dustbin cover with sensors used to fix cover in closed position if cutlery is detected
FR2866121A1 (en) * 2004-02-11 2005-08-12 Europ Distrib Materiel Abrevat Metallic detector for use at e.g. restaurant, has passage including funnel shaped input connected to horizontal tube made of shock absorbing material, and closing unit provided to close passage
JP2017035502A (en) * 2008-05-30 2017-02-16 ストライカー・コーポレイション Waste collection system for collecting solid medical waste including bag-tensioning mechanism
US10083593B2 (en) 2008-05-30 2018-09-25 Stryker Corporation System and method for collecting medical waste that monitors the waste for objects that may have been inadvertantly discarded
US11676474B2 (en) 2008-05-30 2023-06-13 Stryker Corporation System and method for collecting medical waste that monitors the waste for objects that may have been inadvertently discarded

Also Published As

Publication number Publication date
ATE118440T1 (en) 1995-03-15
AU9079291A (en) 1992-06-25
GR3015606T3 (en) 1995-06-30
ES2068023T3 (en) 1995-04-01
DK0558605T3 (en) 1995-05-08
DE69107475T2 (en) 1995-06-14
NL9002633A (en) 1992-06-16
EP0558605B1 (en) 1995-02-15
DE69107475D1 (en) 1995-03-23
EP0558605A1 (en) 1993-09-08

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