GB890039A - Improvements in particle size analyzer - Google Patents
Improvements in particle size analyzerInfo
- Publication number
- GB890039A GB890039A GB4261660A GB4261660A GB890039A GB 890039 A GB890039 A GB 890039A GB 4261660 A GB4261660 A GB 4261660A GB 4261660 A GB4261660 A GB 4261660A GB 890039 A GB890039 A GB 890039A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- aperture
- commutator
- objects
- iris
- 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
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
- G06M11/00—Counting of objects distributed at random, e.g. on a surface
- G06M11/02—Counting of objects distributed at random, e.g. on a surface using an electron beam scanning a surface line by line, e.g. of blood cells on a substrate
- G06M11/04—Counting of objects distributed at random, e.g. on a surface using an electron beam scanning a surface line by line, e.g. of blood cells on a substrate with provision for distinguishing between different sizes of objects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
- G01N21/5907—Densitometers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Exposure Control For Cameras (AREA)
Abstract
890,039. Counting-apparatus. ZEISS-STIFTUNG, CARL, [trading as ZEISS-C. [Firm of]]. Dec. 12, 1960 [Dec. 10, 1959 (2)], No. 42616/60. Class 106 (1). In apparatus for counting objects in categories according to size, the aperture of an adjustable iris diaphragm is projected on to the objects, counters are associated with contacts connected with the diaphragm setting member and mechanical means are provided for varying the width of the aperture intervals associated with the individual counters, further means being provided for ensuring that the distance between successive aperture intervals is zero. As described for counting objects into fortyeight size categories, forty-eight counters 3 are provided, together with a totalizing counter 4. An illuminated ground glass disc 6 has a central transparent part 7 and a transparent copy of a photograph of the objects is so laid on the ground glass disc that the object to be counted lies over the central part 7. Wheels 8, 9 are provided for manually adjusting the aperture of an iris diaphragm (not shown) and thus the size of the spot projected on the transparent part 7. When the spot coincides with the size of the object to be categorized, a foot pedal 12 is depressed, thereby stepping on the appropriate counter 3, rocking a lever 10 to mark the counted object with a pencil 11. The hand wheels 8, 9 are rigidly mounted on a shaft 13 carrying a commutator 65 having conducting portions 23, insulating portions 24 and sliding contacts 25, 26, 27, 28, Figs. 2 and 5. Mounted for axial movement on the shaft 13 is a sleeve 51 guided by a pin 54 in a groove 53 in the shaft 13. Fixed to the sleeve 51 is a worm gear 52 engaging a spirally-toothed gear which when rotated in response to rotation of the wheel 8 or 9, varies the aperture of an iris in a tube 19. Fixed to the sleeve 51 is a transmission member 56 which normally rolls on the front periphery of a hollow cylinder 57. However, by rotation of a knob 63 a cam 59 is moved axially and the transmission member 56 then rolls on the end of the cam 59 so that the shaft 51 is moved axially, the variation of the iris diameter thus being no longer in a linear relationship to the rotation of the handles 8, 9. The counters 3 are associated with fixed increments of hand wheel rotation so objects of a prescribed size range can be distributed into more or fewer catagories according to the development of the cam 59. In operation, the hand wheels 8, 9 are rotated to set the desired iris aperture, thereby rotating the commutator 65 and an auxiliary commutator 16. The foot switch 12 is then actuated to close switches 33, 34, Fig. 5, thereby actuating a magnetic brake 18, Figs. 2 and 5, to lock the hand wheels 8, 9. Assuming that the contact 25 is on an insulation gap 24, then the contact 17 is on a conducting portion on the commutator 16 so that a relay 39 is energized to operate switches 41, 42, thereby connecting in circuit the contacts 26, 28 which engage conducting portions 23. The switch 34 operates a relay 36 to pull down the marking lever 10 and close a switch 32, thereby energizing the counter coil 3 1 -3 48 connected between contacts 26, 28 and also the totalizing counter 4. If the contacts 25, 27 engage conducting portions, the relay 39 is not energized since the contact 17 engages an insulated part of the commutator 16. In a modification, instead of the two pairs 25, 27; 26, 28 of contacts one pair of contacts is provided (Fig. 6, not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEZ7712A DE1189290B (en) | 1959-12-10 | 1959-12-10 | Device for the statistical determination of the dimensions of individual elements when evaluating templates |
Publications (1)
Publication Number | Publication Date |
---|---|
GB890039A true GB890039A (en) | 1962-02-21 |
Family
ID=7620239
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4261660A Expired GB890039A (en) | 1959-12-10 | 1960-12-12 | Improvements in particle size analyzer |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1189290B (en) |
GB (1) | GB890039A (en) |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE719148C (en) * | 1939-05-24 | 1942-03-30 | Erich Kieback Dr Ing | Device for adjusting a signal box driven by an adjusting motor as a function of the position of a pulse generator |
-
1959
- 1959-12-10 DE DEZ7712A patent/DE1189290B/en active Pending
-
1960
- 1960-12-12 GB GB4261660A patent/GB890039A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1189290B (en) | 1965-03-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1493184A (en) | Push-button tuning device | |
GB890039A (en) | Improvements in particle size analyzer | |
ES369187A1 (en) | Electrical switches | |
US2190682A (en) | Direction of rotation responsive switch | |
GB1044136A (en) | Improved steering column switch mechanism | |
GB1393108A (en) | Timing mechanism | |
GB912941A (en) | Electrical heating and ventilating apparatus | |
GB1279751A (en) | A switching device | |
GB1512003A (en) | Brake indicating device | |
US3111768A (en) | Statistical element counter | |
GB1008360A (en) | Improvements in electric switch-actuating mechanisms | |
GB847648A (en) | Improvements in or relating to electric switches and indicators therefor | |
ES385292A1 (en) | Release device, particularly for switches or similar, of small power | |
GB1235268A (en) | Improvements relating to push-push electrical switches | |
US2476768A (en) | Electric-lighting switch | |
GB391329A (en) | Improved apparatus for practising golf shots | |
GB551761A (en) | Tuning mechanism for wireless apparatus | |
GB500522A (en) | Regulating resistance combined with a line circuit closer and interrupter | |
JPS56119154A (en) | Developing device of electrophotographic copying machine | |
GB688447A (en) | Improvements in or relating to foot-operated electric switch-actuating means | |
GB845382A (en) | Electric switch interposed in a mechanical linkage | |
GB519605A (en) | Improvements in snap-action electric switches | |
GB862899A (en) | Improvements in or relating to remote electrical indicating devices | |
GB786461A (en) | Electric time switching device | |
GB870133A (en) | Multi-position rotary electric switch device |