US2264210A - Means for mounting objects in electron microscopes - Google Patents

Means for mounting objects in electron microscopes Download PDF

Info

Publication number
US2264210A
US2264210A US290916A US29091639A US2264210A US 2264210 A US2264210 A US 2264210A US 290916 A US290916 A US 290916A US 29091639 A US29091639 A US 29091639A US 2264210 A US2264210 A US 2264210A
Authority
US
United States
Prior art keywords
cylinder
rod
electron
vacuum
aperture
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US290916A
Inventor
Krause Karl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US2264210A publication Critical patent/US2264210A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • H01J37/18—Vacuum locks ; Means for obtaining or maintaining the desired pressure within the vessel

Definitions

  • This invention relates to means for. mounting objects in an electron-microscope.
  • Electron-microscopes provided with means for mounting objects are known in which a conical metal body is arranged in a conical guide. It is, however, known that conical guides require grease for satisfactory operation.
  • the means according to the invention consist of an optically ground bar provided with a number of openings at right-angles to its axis for receiving objects.
  • the bar is guided in a sleeve and the sleeve and bar are additionally sealed outside the electronmicroscope by a packing.
  • the use of grease as a sealing agent is unnecessary and at the same time a number of objects can be inserted in the object carrier which may be brought successively into the path of the rays for examination.
  • the known air lock arrangements only a single object is provided or two plates or films inside a cone.
  • ve chambers are provided, the number of which could be further increased if necessary.
  • a further advantage is seen in the exchanging of the objects. This is effected, according to the invention, for example by simply rotating the bar with an object holder so that the object can drop out and it is not necessary to push the object out by means of a more or less long rod.
  • the invention also makes it possible to provide for cooling or heating by the arrangement of passages which may be of great importance in examining delicate organic preparations if these, for example, are liable to be frozen by extensive cooling.
  • the arrangement according to the invention is illustrated diagrammatically and by way of example in the accompanying drawing.
  • the gure is a cross section of one constructional example.
  • a tube c passes through the vacuum space a of an electron-microscope b.
  • an optically ground rod d is arranged having a number of openings ce1-e5.
  • the objects are inserted in the openings, for example by means of the object holders f, as seen in the opening es which is shown broken away.
  • the object rod d and the sleeve c are further sealed outside the electron-microscope b by a packing g.
  • a passage h parallel to the axis of the rod d may be provided in addition to the object chambers for the passage of cooling liquid or of electrical conductors.
  • the invention further provides, between the tube c and the rod d, an annular hollow space i which is connected to a vacuum pipe.
  • an electric discharge tube a cylinder extending through the discharge tube and sealed with respect thereto, said cylinder having an aperture therein for the passage of electrons therethrough, a rod slidable in said cylinder for supporting an object to be analyzed adjacent said aperture, and the periphery of said rod tting the inner surface of said cylinder in a vacuum-tight manner whereby the object carried by said rod may be longitudinally moved with respect to said aperture without altering the pressure within said discharge tube.
  • a cylinder extending through the tube and sealed with respect thereto, said cylinder having an aperture therein for the passage of electrons therethrough, a rod slidable in said cylinder and having transverse openings therein for receiving objects to be subjected to the electrons adjacent said aperture, and the. peripheral surface of said rod engaging the inner surface of said cylinder in a vacuum-tight manner whereby the objects arranged in the openings of said rod may each be positioned adjacent said aperture without disturbing the vacuum within said discharge tube.
  • a vacuum electron tube a cylinder extending transversely through the electron tube and sealed with respect thereto, said cylinder having an aperture therein extending transversely therethrough for the passage of electron rays through the aperture, a rod slidable in said cylinder and having openings spaced therealong each extending transversely through the rod for receiving objects to be subjected to the electron rays passing through said aperture, and the peripheral surface of said rod fitting the inner surface of said cylinder in a vacuum-tight manner whereby the rod may be rotated and longitudinally moved in the cylinder without disturbing the vacuum Within said electron tube.
  • a vacuum electron tube a cylinder extending transversely through the electron tube and sealed with respect thereto, said cylinder having an aperture therein extending transversely therethrough for the passage of electron rays through the aperture, a rod slidable in said cylinder and having openings spaced therealong each extending transversely through the rod for receiving objects to be subjected to the electron rays passing through said aperture, the peripheral surface of said rod fitting the inner surface of said cylinder in a vacuum-tight manner whereby the rod may be rotated and longitudinally moved in the cylinder without disturbing the vacuum within said electron tube, and said cylinder having an annular space outside said electron tube for removing air trapped within said openings.
  • a vacuum electron tube a cylinder extending transversely through the electron tube and sealed with respect thereto, said cylinder having an aperture therein extending transversely therethrough for the passage of electron rays through the aperture, a rod slidable in said cylinder and having openings spaced therealong each extending transversely through the rod for receiving objects to be subjected to the electron rays passing through said aperture, the peripheral surface of said rod fitting the inner surface of said cylinder in a vacuum-tight manner whereby the rod may be rotated and longitudinally moved in the cylinder without disturbing the vacuum without said electron tube, and packing means for further sealing the periphery of the rod with respect to said cylinder.
  • an electric discharge tube a cylinder extending through said tube and sealed with respect thereto, said cylinder having a transverse aperture therethrough for the passage of electrons, a rod slidable and rotatable in said cylinder and having transverse openings therethrough for receiving objects to be subjected to the electrons passing through said aperture, the peripheral surface of said rod engaging the inner surface of said cylinder in a vacuum-tight manner whereby the objects arranged in the openings of said rod may each be positioned adjacent said aperture Without disturbing the vacuum within the discharge tube, and said rod having an axially extending passage therein.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Electron Sources, Ion Sources (AREA)

Description

K. KR'AUsE 2,264,210 MEANS FOR MOUNTING OBJECTS IN ELECTRON MICROSCOPES Nov. 25, 1941.
Filed Aug. 18, 1939 W n e Ov w W. r a l n V Q? Q wf f r; N7 L ,nu l l Q x Q m Q M &\^/ z L Patented Nov. 25, 1941 MEAN S FOR MOUNTING OBJECTS IN ELEC- TRON IMICROSCOPES Karl Krause, Berlin, Germany Application August 18, 1939, Serial No. 290,916
` In Germany November 19, 1937 (Cl. Z50-49.5)
6 Claims.
This invention relates to means for. mounting objects in an electron-microscope.
Electron-microscopes provided with means for mounting objects are known in which a conical metal body is arranged in a conical guide. It is, however, known that conical guides require grease for satisfactory operation.
In contradistinction thereto, the means according to the invention consist of an optically ground bar provided with a number of openings at right-angles to its axis for receiving objects. The bar is guided in a sleeve and the sleeve and bar are additionally sealed outside the electronmicroscope by a packing.
By means of the optically ground bar according to the invention the use of grease as a sealing agent is unnecessary and at the same time a number of objects can be inserted in the object carrier which may be brought successively into the path of the rays for examination. In the known air lock arrangements only a single object is provided or two plates or films inside a cone.
In the arrangement illustrated in the accompanying drawing as a constructional example, ve chambers are provided, the number of which could be further increased if necessary.
A further advantage is seen in the exchanging of the objects. This is effected, according to the invention, for example by simply rotating the bar with an object holder so that the object can drop out and it is not necessary to push the object out by means of a more or less long rod.
The invention also makes it possible to provide for cooling or heating by the arrangement of passages which may be of great importance in examining delicate organic preparations if these, for example, are liable to be frozen by extensive cooling.
The arrangement according to the invention is illustrated diagrammatically and by way of example in the accompanying drawing. The gure is a cross section of one constructional example.
Referring to Figure l, a tube c passes through the vacuum space a of an electron-microscope b. In the cylinder c an optically ground rod d is arranged having a number of openings ce1-e5. The objects are inserted in the openings, for example by means of the object holders f, as seen in the opening es which is shown broken away. The object rod d and the sleeve c are further sealed outside the electron-microscope b by a packing g.
In order that the temperature of the object may be controlled without affecting the vacuum, a passage h parallel to the axis of the rod d may be provided in addition to the object chambers for the passage of cooling liquid or of electrical conductors.
In order, when exchanging objects, to pump out the openings in the rod and to intercept any air, the invention further provides, between the tube c and the rod d, an annular hollow space i which is connected to a vacuum pipe.
During these operations the vacuum in the interior, apart from small quantities of air which enter, is completely maintained, so that rapid operation is ensured (for example in a series of examinations). It is possible to introduce a number of objects into the high vacuum space at one time. By the use of an optically ground bar which bears against the inner surface of the tube c with a suction eiect and, on account of the provision of the packing, it is not necessary to use grease. The invention can, therefore, also be employed when cooling with liquid is used.
While the invention has been described with reference to specic structural details it will be appreciated that changes may be made therein. Such modications may be made without departing from the spirit and scope of the invention as set forth in the appended claims.
I claim:
l. In an electron microscope, an electric discharge tube, a cylinder extending through the discharge tube and sealed with respect thereto, said cylinder having an aperture therein for the passage of electrons therethrough, a rod slidable in said cylinder for supporting an object to be analyzed adjacent said aperture, and the periphery of said rod tting the inner surface of said cylinder in a vacuum-tight manner whereby the object carried by said rod may be longitudinally moved with respect to said aperture without altering the pressure within said discharge tube.
2. In a vacuum electric discharge tube, a cylinder extending through the tube and sealed with respect thereto, said cylinder having an aperture therein for the passage of electrons therethrough, a rod slidable in said cylinder and having transverse openings therein for receiving objects to be subjected to the electrons adjacent said aperture, and the. peripheral surface of said rod engaging the inner surface of said cylinder in a vacuum-tight manner whereby the objects arranged in the openings of said rod may each be positioned adjacent said aperture without disturbing the vacuum within said discharge tube.
3. In an electron microscope, a vacuum electron tube, a cylinder extending transversely through the electron tube and sealed with respect thereto, said cylinder having an aperture therein extending transversely therethrough for the passage of electron rays through the aperture, a rod slidable in said cylinder and having openings spaced therealong each extending transversely through the rod for receiving objects to be subjected to the electron rays passing through said aperture, and the peripheral surface of said rod fitting the inner surface of said cylinder in a vacuum-tight manner whereby the rod may be rotated and longitudinally moved in the cylinder without disturbing the vacuum Within said electron tube.
4. In an electron microscope, a vacuum electron tube, a cylinder extending transversely through the electron tube and sealed with respect thereto, said cylinder having an aperture therein extending transversely therethrough for the passage of electron rays through the aperture, a rod slidable in said cylinder and having openings spaced therealong each extending transversely through the rod for receiving objects to be subjected to the electron rays passing through said aperture, the peripheral surface of said rod fitting the inner surface of said cylinder in a vacuum-tight manner whereby the rod may be rotated and longitudinally moved in the cylinder without disturbing the vacuum within said electron tube, and said cylinder having an annular space outside said electron tube for removing air trapped within said openings.
5. In an electron microscope, a vacuum electron tube, a cylinder extending transversely through the electron tube and sealed with respect thereto, said cylinder having an aperture therein extending transversely therethrough for the passage of electron rays through the aperture, a rod slidable in said cylinder and having openings spaced therealong each extending transversely through the rod for receiving objects to be subjected to the electron rays passing through said aperture, the peripheral surface of said rod fitting the inner surface of said cylinder in a vacuum-tight manner whereby the rod may be rotated and longitudinally moved in the cylinder without disturbing the vacuum without said electron tube, and packing means for further sealing the periphery of the rod with respect to said cylinder.
6. In an electron microscope, an electric discharge tube, a cylinder extending through said tube and sealed with respect thereto, said cylinder having a transverse aperture therethrough for the passage of electrons, a rod slidable and rotatable in said cylinder and having transverse openings therethrough for receiving objects to be subjected to the electrons passing through said aperture, the peripheral surface of said rod engaging the inner surface of said cylinder in a vacuum-tight manner whereby the objects arranged in the openings of said rod may each be positioned adjacent said aperture Without disturbing the vacuum within the discharge tube, and said rod having an axially extending passage therein.
KARL KRAUSE.
US290916A 1937-11-20 1939-08-18 Means for mounting objects in electron microscopes Expired - Lifetime US2264210A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEK148599D DE708778C (en) 1937-11-20 1937-11-20 Device for introducing objects into the electron microscope
GB22102/39A GB532340A (en) 1937-11-20 1939-07-29 Improved means for mounting objects in an electron-microscope

Publications (1)

Publication Number Publication Date
US2264210A true US2264210A (en) 1941-11-25

Family

ID=25984878

Family Applications (1)

Application Number Title Priority Date Filing Date
US290916A Expired - Lifetime US2264210A (en) 1937-11-20 1939-08-18 Means for mounting objects in electron microscopes

Country Status (5)

Country Link
US (1) US2264210A (en)
BE (1) BE435809A (en)
DE (1) DE708778C (en)
FR (1) FR858324A (en)
GB (1) GB532340A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2420561A (en) * 1944-04-27 1947-05-13 Gen Electric Electron microscope structure
US2421722A (en) * 1944-12-30 1947-06-03 Rca Corp Specimen holder assembly
US2508317A (en) * 1947-07-08 1950-05-16 Hartford Nat Bank & Trust Co Electronic microscope
US2510349A (en) * 1948-11-01 1950-06-06 Rca Corp Rod-type specimen stage for electron optical instruments
US2512947A (en) * 1946-08-30 1950-06-27 Hartford Nat Bank & Trust Co Electron microscope
US2602899A (en) * 1950-02-23 1952-07-08 Gen Electric Introduction of specimens into discharge vessels
US2849619A (en) * 1948-10-01 1958-08-26 Siemens Ag Electron microscope having a multiplespecimen carrier
US2858444A (en) * 1954-07-14 1958-10-28 Siemens Ag Object-holding device for electron microscopes
US3222496A (en) * 1962-04-18 1965-12-07 Int Resistance Co Apparatus for working materials by means of an electron beam
US3356844A (en) * 1963-07-02 1967-12-05 Centre Nat Rech Metall Rotatable sample changer for an electron probe microanalyzer having means for maintaining a vacuum in the analysis chamber

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE943659C (en) * 1943-03-04 1956-05-24 Bosch Gmbh Robert Device for rotating and moving objects in evacuated rooms
DE901451C (en) * 1944-01-08 1954-01-11 Siemens Ag Device for adjusting objects in corpuscular beam apparatus
DE902286C (en) * 1948-10-01 1956-04-19 Siemens Ag Object table for inserting several objects for corpuscular beam devices
DE898502C (en) * 1950-10-14 1953-11-30 Siemens Ag Object lock for corpuscular beam devices, especially electron microscopes
DE968396C (en) * 1951-05-06 1958-02-13 Zeiss Carl Fa Electron microscope with electrostatic imaging lenses

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2420561A (en) * 1944-04-27 1947-05-13 Gen Electric Electron microscope structure
US2421722A (en) * 1944-12-30 1947-06-03 Rca Corp Specimen holder assembly
US2512947A (en) * 1946-08-30 1950-06-27 Hartford Nat Bank & Trust Co Electron microscope
US2508317A (en) * 1947-07-08 1950-05-16 Hartford Nat Bank & Trust Co Electronic microscope
US2849619A (en) * 1948-10-01 1958-08-26 Siemens Ag Electron microscope having a multiplespecimen carrier
US2510349A (en) * 1948-11-01 1950-06-06 Rca Corp Rod-type specimen stage for electron optical instruments
US2602899A (en) * 1950-02-23 1952-07-08 Gen Electric Introduction of specimens into discharge vessels
US2858444A (en) * 1954-07-14 1958-10-28 Siemens Ag Object-holding device for electron microscopes
US3222496A (en) * 1962-04-18 1965-12-07 Int Resistance Co Apparatus for working materials by means of an electron beam
US3356844A (en) * 1963-07-02 1967-12-05 Centre Nat Rech Metall Rotatable sample changer for an electron probe microanalyzer having means for maintaining a vacuum in the analysis chamber

Also Published As

Publication number Publication date
GB532340A (en) 1941-01-22
DE708778C (en) 1942-01-26
BE435809A (en) 1939-08-31
FR858324A (en) 1940-11-22

Similar Documents

Publication Publication Date Title
US2264210A (en) Means for mounting objects in electron microscopes
GB576003A (en) Improvements in and relating to electron microscopes
US3191028A (en) Scanning electron microscope
GB1355365A (en) Electron guns
JPH01309243A (en) Object lens assembly of environment scanning electron microscope
US2292087A (en) Evacuated electronic apparatus
US3761709A (en) Method and apparatus for observing biological specimens using a scanning electron microscope
US2602899A (en) Introduction of specimens into discharge vessels
US3679900A (en) Specimen holder transfer mechanism for an electron microscope
US9875878B2 (en) Sample holder and analytical vacuum device
US5036205A (en) Apparatus for the transfer and in-situ reactions under a controlled atmosphere, of specimens for transmissive electron microscopy
US2215641A (en) Electrode sealing-in
US2618750A (en) Apparatus for supplying charge material to mass spectrometers
US3596087A (en) Spark source mass spectrometers and sample insertion probe therefor
EP1519399A2 (en) Particle beam apparatus with cooled anti-contamination shield and/or sample holder
JP5839672B2 (en) Low vacuum soft X-ray experimental equipment
US2467224A (en) Neutralization of electrostatic charges in electron-optical instruments
DE1573970A1 (en) Vacuum lock and probe for introducing samples into a mass spectrometer
EP3139397A1 (en) Transport device, treatment device, vacuum device, and charged particle beam device
Donaldson et al. Effects of glass contamination and electrode curvature on electrical breakdown in vacuum
US3135855A (en) Electron beam heating devices
US3446960A (en) Device for measuring electron-beam intensities and for subjecting materials to electron irradiation in an electron microscope
US2843751A (en) Design, construction, and application of a device for obtaining radiographs of microscopic objects in a commercial model electron microscope
DE1539718C3 (en) Electron emission microscope
US3470412A (en) Apparatus for exchanging the filament of an electron gun