US3533504A - Apparatus for sorting fertilized and unfertilized eggs - Google Patents

Apparatus for sorting fertilized and unfertilized eggs Download PDF

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Publication number
US3533504A
US3533504A US761402A US3533504DA US3533504A US 3533504 A US3533504 A US 3533504A US 761402 A US761402 A US 761402A US 3533504D A US3533504D A US 3533504DA US 3533504 A US3533504 A US 3533504A
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United States
Prior art keywords
egg
electrodes
potential
conveyer
fertilized
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Expired - Lifetime
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US761402A
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English (en)
Inventor
Jan Bures
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Czech Academy of Sciences CAS
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Czech Academy of Sciences CAS
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/02—Food
    • G01N33/08—Eggs, e.g. by candling

Definitions

  • the invention relates to an apparatus for sorting fertilized eggs during incubation making use of electrical potentials produced in fertilized eggs.
  • Electrodes connected by means of patches soaked with a saline solutions to the egg pick up potentials generated at the shell surface (diffusion potentials due to'unequal mobilities of ions in the shell pores, local differences in shell density and in the properties of the adhering membranes) as well as potentials arising within the eg (between yolk and egg white, between the embryo and yolk or between different parts of the embryo).
  • there two potentials can be separated from each other by taking advantage of the fact that during the first days of incubation the embryo always floats to the uppermost part of the egg.
  • the overall potential difference V. at the end of the initial recording period of l to 3 minutes is, therefore, equal to the sum of the contact (V and embryonic (V potentials,
  • the invention provides an apparatus comprising an endless conveyer with an upper branch and a lower branch carrying a plurality of electrode pairs.
  • the eggs to be examined are inserted and clamped between these pairs of electrodes, one egg per pair, at the beginning of one of the branches of the conveyer.
  • a capacitor and a resistor are connected in series with each pair of electrodes through a switch.
  • the apparatus further comprises a device for opening the switch at the end of the first branch and closing it again at the end of the second branch.
  • One end of the resistor is connected with one electrodes of the pair and earthed, while the other end of the resistor facing the capacitor is connected with a contact which becomes associated with a measuring device at the end of the second branch when the egg reaches the end of the second branch of the conveyer.
  • the measuring device becomes thus connected a-cross the resistor of the RC circuit at a moment when the switch is closed and the potential V. formed-on the capacitor during the charging period is cornpared with the potential V picked up by the electrodes in the reversed position of the egg.
  • the capacitor is used as a simple memory element storing the value V for a later comparison with the actual value V BRIEF DESCRIPTION OF THE DRAWING
  • FIG. 1 illustrates a conveyer with the main elements of a measuring circuit
  • FIG. 2 illustrates an example of arranging a pair of electrodes for inserting an egg therebetween.
  • the measuring time is shortened in a simple manner by using a large number of electrode pairs carried by an endless conveyer belt. Each electrode pair is connected to a capacitor storage circuit.
  • the differential potential is ready on an amplifier connected with an amplitude discriminator and with an electromechanical switching device for placing fertilized and unfertilized eggs on separate transport means.
  • the apparatus in accordance with the invention employs a conveyer 4 which may be of the belt or chain type, or any other suitable construction.
  • the upper and lower branch of this conveyer extend in an approximately horizontal position.
  • On the conveyer there is provided a plurality of electrodes 1, 2 forming pairs of electrodes between which an egg can be clamped.
  • an egg inserting device 112 At the beginning of one branch of the conveyer 4 there is an egg inserting device 112 where eggs 3 to be tested are placed between the electrodes 11, 2.
  • FIG. 2 shows an example of embodiment of a pair of electrodes for this purpose.
  • This embodiment employs a yoke 5 made from an electroinsulating material carrying the electrodes l, 2. These electrodes are conveniently constructed as nonpolarizable Ag-AgCl electrodes.
  • Each of the pairs of electrodes l, 2 is connected through a switch 6 in series with an RC circuit comprising a capacitor 7 and a resistor 8. The electrode 2 and one of the leads of resistor 8 are grounded,
  • the second lead of the resistor is In the arrangement illustrated in FIG, 1 the upper branch of the conveyer 4 passes first through the egg inserting device 12 in which eggs are placed between the electrode pairs 1, 2, one egg per electrode pair. During the entire time in which an egg is on the upper branch of the conveyer 4; a circuit which includes the grounded conveyer 4, the electrode 2, the egg 3, the electrode 1, the closed switch 6, the capacitor 7 and the resistor 8, is closed.
  • the contacts of the switch 6 are again closed, and the contact 9 is connected to the measuring device 10.
  • electrical current begins to flow through the resistor 8 of the RC circuit 7, 8, and the electrometric device 10 records the voltage drop produced across the terminal of resistor 8 which correspond to the potential difference V.
  • V If the egg was fertilized, a rather large voltage drop can be recorded.
  • the obtained pulse is introduced into an amplitude discriminator.
  • the electromechanical switching device of the transport path in the sorting device 11 places the egg which just leaves the conveyer 4 on a nonilon the other hand, due to the fact that measurement is accomplished in two positions differing by any interfering voltages produced by nonuniformities of the shell of the egg, or for some other reasons, are balanced so that the operation of the apparatusis completely reliable.
  • An apparatus for sorting fertilized and unfertilized eggs I using electrical potentials developed in fertilized eggs during incubation comprising:
  • one of the switch contacts connected with one electrode of the pair of electrodes and the other contact connected with a combination of a capacitor and a resistor;
  • An apparatus as claimed in claim 1, comprising a sorting device controlled by signals from said measuring device.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Sorting Of Articles (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
US761402A 1967-09-20 1968-09-17 Apparatus for sorting fertilized and unfertilized eggs Expired - Lifetime US3533504A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS669967 1967-09-20

Publications (1)

Publication Number Publication Date
US3533504A true US3533504A (en) 1970-10-13

Family

ID=5414624

Family Applications (1)

Application Number Title Priority Date Filing Date
US761402A Expired - Lifetime US3533504A (en) 1967-09-20 1968-09-17 Apparatus for sorting fertilized and unfertilized eggs

Country Status (6)

Country Link
US (1) US3533504A (da)
DE (1) DE1782542A1 (da)
DK (1) DK116694B (da)
FR (1) FR1583332A (da)
GB (1) GB1195940A (da)
NL (1) NL6813447A (da)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1118267A1 (en) * 2000-01-21 2001-07-25 Michael Cohen A method and system for verification of fertilization of poultry eggs
US6488156B1 (en) * 1999-01-20 2002-12-03 Michael Cohen Method and system for verification of fertilization of poultry eggs

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3427373A1 (de) * 1984-07-25 1984-12-13 Ludwig-Bärtels, Gisela, 7400 Tübingen Photonen-phononen-behandlungsgeraet und seine anwendung
RU2161404C1 (ru) * 1999-07-19 2001-01-10 Западно-Сибирская зональная опытная станция по птицеводству Способ определения оплодотворенности яиц птицы
FR2963537B1 (fr) * 2010-08-05 2012-08-03 Ceva Sante Animale Procede de determination de la position d'une aiguille d'injection et/ou de prelevement dans un oeuf et systeme correspondant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6488156B1 (en) * 1999-01-20 2002-12-03 Michael Cohen Method and system for verification of fertilization of poultry eggs
EP1118267A1 (en) * 2000-01-21 2001-07-25 Michael Cohen A method and system for verification of fertilization of poultry eggs

Also Published As

Publication number Publication date
FR1583332A (da) 1969-10-24
DK116694B (da) 1970-02-02
GB1195940A (en) 1970-06-24
NL6813447A (da) 1969-03-24
DE1782542A1 (de) 1971-09-09

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