EP0280375A1
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EP
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Continuously variable microdiaphragm
Assignee: Technology Foundation STW
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Filing: 1988-02-23
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Granted: —
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Expires: 2008-02-23
Abstract
Abstract A continuously variable microdiaphragm has an aperture (3) of which the shape of the cross section remains the same when the aperture becomes greater or smaller. The aperture is lozenge-shaped and is bounded by two recesses each disposed in a separate diaphragm strip (1a, 1b; 2a, 2b). Each of these strips is fixed on or forms part of a transmission leg (4, 5, 30, 31). These legs can be shifted symmetrically relative to each other.
Inventors
- 👤 Godefridus Jacobus Brakenhoff
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 17:30
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/02; G21K1/04; G02; G02B; G02B5/00; G02B5/005; H; H01; H01J; H01J37/00; H01J37/02; H01J37/04; H01J37/09
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
65 words
Microdiaphragm having an adjustable aperture between 0.5 and 1,000 µm, characterized in that a lozenge-shaped opening (3) is bounded by two recesses, each disposed in a separate diaphragm strip (1a, 1b; 2a, 2b), each of said strips being fixed on or forming part of a transmission leg (4, 5, 30, 31), while means are present for shifting the transmission legs symmetrically relative to each other.
Claim 2
Dependent Claim
65 words
Microdiaphragm having an adjustable aperture between 0.5 and 1,000 µm, characterized in that a lozenge-shaped opening (3) is bounded by two recesses, each disposed in a separate diaphragm strip (1a, 1b; 2a, 2b), each of said strips being fixed on or forming part of a transmission leg (4, 5, 30, 31), while means are present for shifting the transmission legs symmetrically relative to each other.
Claim 3
Dependent Claim
28 words
Microdiaphragm according to Claim 1, characterized in that the said recesses are V-shaped and are disposed in the end edge of a diaphragm strip (1a, 1b; 2a, 2b).
Claim 4
Dependent Claim
47 words
Microdiaphragm according to Claim 2, characterized in that each of the diaphragm strips is made up of two plates (1a, 1b; 2a, 2b) which are fastened on each other and have slanting end edges, two slanting end edges lying behind one another always forming a V-shaped recess.
Claim 5
Dependent Claim
42 words
Microdiaphragm according to one of the preceding claims, characterized in that each of the transmission legs (4, 5) is a U-shaped lever which is symmetrically connected by means of a tilting point (6, 7) to a tilting mechanism (8, 9, 10, 11).
Claim 6
Dependent Claim
80 words
Microdiaphragm according to Claim 4, characterized in that the tilting mechanism comprises a rectangular bar structure with a bottom bar (8), two uprights (10, 11) standing perpendicular to said bottom bar and connected thereto and to the levers by means of a tilting point (6, 7), and a bridge piece (9) connected to the uprights (10, 11) and running parallel to the bottom piece (8), while an expandable member (12) is placed between bottom piece (8) and bridge piece (9).
Claim 7
Dependent Claim
36 words
Microdiaphragm according to one of Claims 4 or 5, characterized in that an adjusting screw (15, 16) is added to each U-shaped lever (4, 5) to permit adjustment of the outlet size of the aperture (3).
Claim 8
Dependent Claim
26 words
Microdiaphragm according to Claim 5, characterized in that the expandable member (12) is a column of piezoelectrical material which is connected to an electrical current source.
Claim 9
Dependent Claim
51 words
Microdiaphragm according to one of Claims 1 to 3, characterized in that the transmission legs (30, 31) are connected by means of hinges (32, 33) to legs (34, 35) to which a drive unit (39) is added and which are connected by means of hinges (36, 37) to a block (38).
Claim 10
Dependent Claim
39 words
Microdiaphragm according to Claim 8, characterized in that the transmission legs (30, 31), the legs (34, 35) to which the drive unit (39) is added and the block (38) are made in one piece through the provision of slits.
References Cited (Backward Citations)
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