US3388251A - Device for the cooling or heating of objects arranged on a specimen carrier - Google Patents

Device for the cooling or heating of objects arranged on a specimen carrier Download PDF

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Publication number
US3388251A
US3388251A US378872A US37887264A US3388251A US 3388251 A US3388251 A US 3388251A US 378872 A US378872 A US 378872A US 37887264 A US37887264 A US 37887264A US 3388251 A US3388251 A US 3388251A
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United States
Prior art keywords
carrier
specimen carrier
specimen
cooling
stem
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Expired - Lifetime
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US378872A
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English (en)
Inventor
Grasenick Fritz
Gessner Siegfried
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Individual
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Individual
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00—Furnaces of a kind not covered by any of groups F27B1/00 - F27B15/00
    • F27B17/02—Furnaces of a kind not covered by any of groups F27B1/00 - F27B15/00 specially designed for laboratory use
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/44—Sample treatment involving radiation, e.g. heat
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes
    • G02B21/24—Base structure
    • G02B21/30—Base structure with heating device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/02—Details
    • H01J37/20—Means for supporting or positioning the object or the material; Means for adjusting diaphragms or lenses associated with the support

Definitions

  • the invention relates to a device for the cooling or heating of objects arranged on a specimen carrier, particularly of preparations used in electronic microscopy, wherein the specimen plate comprising a stem is axially displaceable, if necessary, tiltable and rotatable about its axis.
  • a conventional cooling device comprises a cylindrical, double-jacketed vessel receiving the coolant and inserted in the treatment chamber, closed on top by means of an annular cover presenting a tubular extension protruding into the interior of the cooling chamber, the surface of said extension being surrounded by a cooled body consisting of ring segments resting on one side on the surface of said extension while being displaceable axially against the action of a spring on the other side.
  • the specimen plate can be moved close to the said cooling body in heat-conducting communication with the coolant via the annular cover of the cooling chamber.
  • the specimen plate is provided with an electric heating element for the occasional heating of the specimen plate.
  • the high degree of thermal inertia of the heating element is an objectionable feature.
  • the power supply. to the spatially displaceable specimen plate presents considerable difficulties.
  • the convention device comprises a large number of component parts requiring relatively high precision machining, making their manufacture comparatively costly. During the cooling of the specimen plate, heat abduction from the specimen plate to the coolant is impaired by the use of mobile intermediate elements and the surface contact between the cooling body and the specimen plate required to ensure uniform heat transfer is no longer assured when the specimen plate is inclined, however slightly.
  • a specimen carrier which can be moved close to a cooling body in heat-conducting communication with the coolant and/or a heated body and is elastically connected with its shaft so as to permit of limited axial displacement of the specimen carrier in relation to the said stem as well as of inclination of the said specimen carrier about an axis of tilt situated in the plane of the carrier for the purpose of moving the said carrier into operative association with the cooling and/ or heated body.
  • This design provides for positive application of the specimen carrier close to the cooling and/or heated against said body under a uniform pressure over the entire periphery of said carrier, so as to obtain the largest possible contact area, thereby ensuring positive heat transfer from the carrier to the cooling body and/ or from the heated body to the carrier.
  • the absence of mobile parts in the device as hereinabove described alone facilitates the transfer of heat.
  • Moderate inclination of the specimen carrier in relation to the contact surface of the cooling and/or heated body before contact with said contact surface is established will not have any adverse effect as the articulated elastic connection between the carrier and the stem compensates the sloping position in the cooling and/or heating phase.
  • the stem comprises a flange at its carrier end, said fiange seiz- 3,383,251 Patented June 11', 1968 ice ing a fastening ring inserted in a cylindrical recess on the underside of the carrier loosely from behind, a helical compression spring engaging in the underside of the carrier being provided in a concentrical stepped-down bore of the shaft.
  • This particularly simple design is not only inexpensive to manufacture but also advantageous in view of the cooling or heating effect thereby achieved.
  • the concentric action of the spring on the plate ensures uniformity of pressure applied to contact surfaces over the entire preiphery of the carrier even if the latter assumes an inclined position, provided the same does not exceed the tilting range of the plate toward the shaft.
  • the carrier and the shaft are in contact with each other alongside narrow bearing surfaces only, so that the specimen carrier is the chief beneficiary of the cooling and/or heating effect and will quickly take on the desired temperature.
  • the shaft comprises a flange at its carrier end, said flange engaging in a fastening ring inserted in a cylindrical recess on the underside of the carrier with a clearance, a star-shaped spring, an annular corrugated spring or the like clamping element being provided in the recess between the annular fiange and the carrier.
  • FIG. 1 shows a sectional view through the longitudinal axis of the device according to the invention
  • FIG. 2 is a section through a detail on the line IIII of FIG. 1,
  • FIGS. 3 and 4 each showing an axial cross-sectional view of an example of the specimen carrier according to the invention
  • FIG. 5 is a top view of the embodiment shown in FIG. 4 with the specimen carrier removed.
  • a cylindrical cooling jacket 1 is provided, e.g. inside a treatment chamber (not shown), which can be designed, for example, as a container serving to produce a vacuum, said cooling jacket being closed on top by a ring 2 and enclosing the specimen carrier 7.
  • the specimen carrier 7 is mounted on a tilting platform 3 in such a manner as to be rotatable around an axis extending in perpendicular relation to its plane, the tilting platform 3 carrying the specimen carrier 7 being pivoted on a supporting frame 4 and rotatable around an axis extending in parallel relation to the plane of the specimen carrier 7.
  • the specimen carrier 7 and the central part of the tilting platform 3 are shown in elevation in FIG. 1.
  • the supporting frame 4 comprises two horseshoe-shaped ring segments 17 and 18 superjacent in spaced relation to each other, and interconnected at their open ends by brackets S and 5 respectively and on their closed end by another bracket 19.
  • the supporting frame 4 is mounted on slide bars 20, 20' traversing the bracket 19 and maintained in position at their upper extremities by means of a ring 21 in such a manner as to be shiftable in the longitudinal direction of the device.
  • the ring 21 is further supported by columns 22, 22' provided outside the supporting frame 4.
  • the supporting frame 4 is displaced by means of a threaded spindle 23 rotatably mounted with its upper extremity in the ring 21, the said spindle traversing the bracket 19 and co-operating with a female thread 24 provided in same.
  • a grooved shaft 25 traversing the bracket 5 is provided,
  • a cooled body comprising a tube 6 extending through the ring 21 of the holder and the horseshoeshaped ring segment 17 as far as the area of the supporting frame 4, the said tube presenting a flange 27 at its upper extremity, said flange being mounted on the ring 2 of the cooling jacket 1.
  • the specimen carrier 7 is elastically connected with its stem 8 presenting a flange 9 at its carrier end, said flange seizing a fastening ring 11 screwed into a cylindrical recess on the underside of the plate 7 and provided with blind bores for the insertion of a wrench, loosely from behind.
  • the stem 8 is provided with a concentrical stepped-down bore 12 in which a helical compression spring 13 is inserted, the lower extremity of which rests on the shoulder of the bore 12, while its other extremity acts on a projection on the underside of the carrier 7.
  • a tubular sleeve 16 tops the shaft 8.
  • a starshaped spring 14 is located in the cylindrical recess 10 between the flange 9 and the specimen carrier 7, the bent-up spring arms of which act on the underside of the carrier 7, whereas the central area of the spiral spring 14 is elastically applied against the flange 9 of the stem 8.
  • FIG. 3 indicates the maximum tilt of the stem 8 possible in relation to the plate 7 as shown by the dotted line illustrating the tilt of the flange 9.
  • the limited axial displaceability and tiltability of the specimen carrier in relation to the stem 8 permits positive application of the carrier 7 against the tube 6 thus ensuring efficient and rapid cooling or heating of the specimen carrier 7, as the case may be.
  • a heated body such as a heated ring arranged in concentrical relation to the cooling body and axially displaceable, said ring being moved close to the specimen plate for the purpose of heating the latter.
  • a heated body such as a heated ring arranged in concentrical relation to the cooling body and axially displaceable, said ring being moved close to the specimen plate for the purpose of heating the latter.
  • the cooling body and the heated body opposite each other, the plate being brought into contact with any of these bodies in its topmost or bottommost position, as the case may be.
  • a plurality of compression springs distributed over the periphery of the flange 9 for the purpose of producing the pressure required for the application of the plate 7 to the cooling body or to the heated body, or flexible Washers made of rubber or the like could be substituted for the 4- springst
  • the flange 9 itself could constitute the spring means, the carrier being secured to it at the outer periphery.
  • a device for the cooling or heating of articles, particularly of preparations used in electron microscopy, in a treatment chamber comprising a specimen carrier to receive the article to be treated, means for displacing, tilting and rotating the said specimen carrier about an axis thereof, at least one body having a temperature diflerent from that of the said specimen carrier which may be brought into a heat conductive contact with the said body, and a stern elastically connected with the specimen carrier on the side of the specimen carrier facing away from the surface carrying the article thus to thereby permit a limited amount of axial displacement and inclination of the specimen carrier in relation to the said stem for the purpose of achieving uniformity of the heat-conductive contact between the specimen carrier and the said body.
  • the specimen carrier has a cylindrical recess on the side carrying the said stem, and in which a fastening ring is provided inserted in said recess, said stem having a flange at the extremity thereof facing the specimen carrier, said flange being arranged in the said recess of the specimen carrier between the latter and the said fastening ring, the outside diameter of the said flange being larger than the internal diameter of the said fastening ring, and in which a prestressed spring is provided between the said specimen carrier and the stem.
  • a device in which a concentric stepped-down bore is provided in the said stem, and in which a helical compression spring is provided resting with one of its extremities in the said bore of the stem and with its other extremity on the side of the said specimen carrier carrying the said stem.
  • the specimen carrier has a cylindrical recess on the side carrying the said stem, and in which a fastening ring is provided inserted in said recess, said stem having a flange at the extremity thereof facing the specimen carrier, said flange being arranged in the said recess of the specimen carrier between the latter and the said fastening ring, the outside diameter of the said flange being larger than the internal diameter of the said fastening ring, and in which a prestressed spring is provided between the said specimen carrier and the stem, said prestressed spring consisting of a star-shape arranged in the said recess of the specimen carrier between the latter and the said flange.

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  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Clinical Laboratory Science (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)
US378872A 1963-07-11 1964-06-29 Device for the cooling or heating of objects arranged on a specimen carrier Expired - Lifetime US3388251A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT558463A AT239877B (de) 1963-07-11 1963-07-11 Einrichtung zur Kühlung oder Erwärmung von auf einem Objektteller angeordneten Gegenständen

Publications (1)

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US3388251A true US3388251A (en) 1968-06-11

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US378872A Expired - Lifetime US3388251A (en) 1963-07-11 1964-06-29 Device for the cooling or heating of objects arranged on a specimen carrier

Country Status (7)

Country Link
US (1) US3388251A (de)
AT (1) AT239877B (de)
CH (1) CH421548A (de)
DE (1) DE1220166B (de)
GB (1) GB1071182A (de)
NL (1) NL144433B (de)
SE (1) SE306974B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4301371A (en) * 1979-04-12 1981-11-17 Balzers Aktiengesellschaft Holding device for electron-microscope specimens
US4427891A (en) 1979-09-20 1984-01-24 Georges Adrien J P Variable temperature stage device for electron microscope
US4532426A (en) * 1983-06-17 1985-07-30 Hughes Aircraft Company Wafer height correction system for focused beam system
CN108896595A (zh) * 2018-06-15 2018-11-27 昆明理工大学 一种保护探头的扫描电镜试样台

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140393A (en) * 1961-03-22 1964-07-07 List Hans Apparatus for the irradiation or vacuum-coating of specimens
US3168646A (en) * 1961-04-13 1965-02-02 List Hans Device for varying the spatial position of specimens in electron microscopes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140393A (en) * 1961-03-22 1964-07-07 List Hans Apparatus for the irradiation or vacuum-coating of specimens
US3168646A (en) * 1961-04-13 1965-02-02 List Hans Device for varying the spatial position of specimens in electron microscopes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4301371A (en) * 1979-04-12 1981-11-17 Balzers Aktiengesellschaft Holding device for electron-microscope specimens
US4427891A (en) 1979-09-20 1984-01-24 Georges Adrien J P Variable temperature stage device for electron microscope
US4532426A (en) * 1983-06-17 1985-07-30 Hughes Aircraft Company Wafer height correction system for focused beam system
CN108896595A (zh) * 2018-06-15 2018-11-27 昆明理工大学 一种保护探头的扫描电镜试样台

Also Published As

Publication number Publication date
CH421548A (de) 1966-09-30
AT239877B (de) 1965-04-26
NL6407764A (de) 1965-01-12
NL144433B (nl) 1974-12-16
GB1071182A (en) 1967-06-07
SE306974B (de) 1968-12-16
DE1220166B (de) 1966-06-30

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