US917442A - Pipette attachment. - Google Patents
Pipette attachment. Download PDFInfo
- Publication number
- US917442A US917442A US45334408A US1908453344A US917442A US 917442 A US917442 A US 917442A US 45334408 A US45334408 A US 45334408A US 1908453344 A US1908453344 A US 1908453344A US 917442 A US917442 A US 917442A
- Authority
- US
- United States
- Prior art keywords
- pipette
- tube
- attachment
- roller
- base
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
- B01L3/0213—Accessories for glass pipettes; Gun-type pipettes, e.g. safety devices, pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
Definitions
- This invention is directed to improvements in pipette attachments, embodying a construction easily operable to draw into the pipette when ap lied thereto, any required quantity of liquid and eject the same when desired.
- the operation of the attachment is such that the admission of the liquid to the pipette can be gaged with minuteness, making the invention particularly desirable in cases where precision is required.
- FIG. 1 is a perspective view of one embodiment of my invention with a pipette applied thereto;
- Fig. 2 is a longitudinal, central, vertical section of the attachment to the upper portion of a pipette, and
- Fig. 3 is a cross section on the line 3-3 of Fig. 2 showing the roller in full.
- the invention comprises a trough-like body composed of a base l with flanges 2 at each side thereof, said body being preferably constructed of sheet metal as illustrated.
- the flanges 2 are provided with alining, longitudinal slots 3 positioned a suitable distance from the base 1 and form bearings for trunnions 4 projecting from the ends of a roller 5, said roller preferably being knurled on its circumference and of such length as to neatly fit between the fianges.
- a rubber or other flexible tube 6 Placed between the base 1 of the trough-like body and the roller 5 is a rubber or other flexible tube 6, the lower end of which passes through a split clamp 7, preferably formed as an integral part of said body, and provided with paral el meeting portions 8 through which a thumb-nut 9, threaded into one of them, is passed.
- the clamp 7, under the action of the thumb-nut 9, binds the lower end of the tube about the uplper end of a pipette 1() placed therein, as 1 ustrated in Fig.
- the diameter of the roller 5 is such that it will flatten the tube and press the inner walls thereof close together on rolling over it, as shown in 3. Itis obvious from this construction. that on placing the pipette in a liquid and grasping the trough-shaped body and roller, respectively, between the thumb and fore-finger and moving the roller upwardly, the suction caused by this action will carry the liquid within the pipette. As the movement of the roller may be carried on veryslowly, the quantity of liquid sucked into the pipette may be gaged with precision. On moving the roller 5 in the reverse direction, the liquid in the pipette is ejected.
- a pipette attachment comprising a body, a fieXible tube seated on said body, an expansible clamp formed at one end of said body for detachably clamping the tube to the pipette, and a device longitudinally movable over said tube acting ⁇ to flatten it against said body, for the purpose described.
- a pipette attachment comprising a trough-like body composed. of a base and side flanges rigidly connected together, a fieXible tube within said body, and a device longitudinally movable over said tube, in guide- Ways provided in said flanges, acting to flatten the tube against said base.
- a pipette attachment comprising a trouglblike body composed of a base with side flanges, the latter being provided with longitudinal slots, a fieXible tube within said body, and a roller having trunnions projecting into said slots movable over said tube and acting to flatten it against said body.
- a pipette attachment comprising a trough-like body made of sheet metal and composed of a base having flanges at each side thereof, said flanges being provided with longitudinal slots, a flexible tube arranged adjacent to said base, and a lmurled roller having trunnions projecting into said slots acting when movedv over said tube, to flatten it against said base.
- a pipette attachment comprising a trough-like body having a split clamp formed as an integral part at one end thereof,
Description
A. E. HUTGHINSON.
PIPETTE ATTACHMENT.
APrLIoATIoN FILED JAN. 22, 1907. BENEWBD SEPT. 1e, 190s.
Patented Apr. 6, 1.909.
- /Nl/ENTOR L f zeff'jfuz/az ATTORNEYS rm: amers .versies co.. wAsHmcraN, n4 c.
UNITED sTATns ATnnT orario.
ALBERT EDWARD HUTCHINSON, OF VICTOR, COLORADO.
PIPETTE ATTACHMENT.
Application filed January 22, 1907, Serial No. 353,436. Renewed September 16, 1908.
Specification of Letters Patent.
Patented April 6, 1909.
Serial No. 453,344.
To all whom it may concern,.-
Be it known that I, ALBERT EDWARD HUToHINsoN, a citizen of the United States, and a resident of Victor, in the county of Teller and State of Colorado, have invented a new and Improved Pipette Attachment, of which the following is a full, clear, and exact description.
This invention is directed to improvements in pipette attachments, embodying a construction easily operable to draw into the pipette when ap lied thereto, any required quantity of liquid and eject the same when desired.
The operation of the attachment is such that the admission of the liquid to the pipette can be gaged with minuteness, making the invention particularly desirable in cases where precision is required.
Reference is to be had to the accompanyingl drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the fig- Figure l is a perspective view of one embodiment of my invention with a pipette applied thereto; Fig. 2 is a longitudinal, central, vertical section of the attachment to the upper portion of a pipette, and Fig. 3 is a cross section on the line 3-3 of Fig. 2 showing the roller in full.
The invention comprises a trough-like body composed of a base l with flanges 2 at each side thereof, said body being preferably constructed of sheet metal as illustrated. The flanges 2 are provided with alining, longitudinal slots 3 positioned a suitable distance from the base 1 and form bearings for trunnions 4 projecting from the ends of a roller 5, said roller preferably being knurled on its circumference and of such length as to neatly fit between the fianges. Placed between the base 1 of the trough-like body and the roller 5 is a rubber or other flexible tube 6, the lower end of which passes through a split clamp 7, preferably formed as an integral part of said body, and provided with paral el meeting portions 8 through which a thumb-nut 9, threaded into one of them, is passed. The clamp 7, under the action of the thumb-nut 9, binds the lower end of the tube about the uplper end of a pipette 1() placed therein, as 1 ustrated in Fig.
The diameter of the roller 5 is such that it will flatten the tube and press the inner walls thereof close together on rolling over it, as shown in 3. Itis obvious from this construction. that on placing the pipette in a liquid and grasping the trough-shaped body and roller, respectively, between the thumb and fore-finger and moving the roller upwardly, the suction caused by this action will carry the liquid within the pipette. As the movement of the roller may be carried on veryslowly, the quantity of liquid sucked into the pipette may be gaged with precision. On moving the roller 5 in the reverse direction, the liquid in the pipette is ejected.
Although I have described the construction and nature of the invention in detail, it is obvious that the same may be variously modied; and I consider that I am entitled to such modifications as fall within the scope of the appended claims.
Having thus described my invention I claim as new and desire to secure by Letters Patent:
1. A pipette attachment comprising a body, a fieXible tube seated on said body, an expansible clamp formed at one end of said body for detachably clamping the tube to the pipette, and a device longitudinally movable over said tube acting` to flatten it against said body, for the purpose described.
2. A pipette attachment comprising a trough-like body composed. of a base and side flanges rigidly connected together, a fieXible tube within said body, and a device longitudinally movable over said tube, in guide- Ways provided in said flanges, acting to flatten the tube against said base.
3. A pipette attachment comprising a trouglblike body composed of a base with side flanges, the latter being provided with longitudinal slots, a fieXible tube within said body, and a roller having trunnions projecting into said slots movable over said tube and acting to flatten it against said body.
4. A pipette attachment comprising a trough-like body made of sheet metal and composed of a base having flanges at each side thereof, said flanges being provided with longitudinal slots, a flexible tube arranged adjacent to said base, and a lmurled roller having trunnions projecting into said slots acting when movedv over said tube, to flatten it against said base.
5. A pipette attachment comprising a trough-like body having a split clamp formed as an integral part at one end thereof,
e 'flexible tube Within said body passing` through said clamp for receiving' one end of a pipette, means for drawing the clamp together to bind the tube about the ipette,
and e device longitudinally inovab e oyen said tube acting to Hatten it against said body, for the purpose described.
in testimony whereof 1 have signed my I name to this specification in the presence of l two subscribing Witnesses.
' ALBERT' EDWARD HU'ICHINSON. Witnesses:
S. A. HARKLEY, g B. F. ZIMMERMAN.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US45334408A US917442A (en) | 1908-09-16 | 1908-09-16 | Pipette attachment. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US45334408A US917442A (en) | 1908-09-16 | 1908-09-16 | Pipette attachment. |
Publications (1)
Publication Number | Publication Date |
---|---|
US917442A true US917442A (en) | 1909-04-06 |
Family
ID=2985877
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US45334408A Expired - Lifetime US917442A (en) | 1908-09-16 | 1908-09-16 | Pipette attachment. |
Country Status (1)
Country | Link |
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US (1) | US917442A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2709024A (en) * | 1951-03-17 | 1955-05-24 | Lemoine Serge | Device for the automatic delivery of fluid and pasty material incorporating automatic closing means |
US2866340A (en) * | 1955-09-06 | 1958-12-30 | Goldberg Moshe | Device for taking samples of liquid for testing |
US2960868A (en) * | 1957-12-23 | 1960-11-22 | George E Price | Pipette pump |
US3786683A (en) * | 1972-09-12 | 1974-01-22 | Alphamedics Mfg Corp | Hand-operated pipette |
US3811603A (en) * | 1968-04-15 | 1974-05-21 | Hynson Westcott & Dunning Inc | Dropper and stirrer dispensing a single drop |
US4367754A (en) * | 1979-04-02 | 1983-01-11 | American Hospital Supply Corporation | Method of dispensing a blood sample |
US5114679A (en) * | 1990-08-27 | 1992-05-19 | Eastman Kodak Company | Method of using a pipette |
US5406856A (en) * | 1991-12-17 | 1995-04-18 | Eppendorf-Netheler Hinz | Pipetting apparatus |
US5445797A (en) * | 1994-06-14 | 1995-08-29 | Flesher; Robert W. | Micro-pipettor assembly |
WO2019206944A1 (en) * | 2018-04-26 | 2019-10-31 | Robert Bosch Gmbh | Device and method for preparing sample material |
-
1908
- 1908-09-16 US US45334408A patent/US917442A/en not_active Expired - Lifetime
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2709024A (en) * | 1951-03-17 | 1955-05-24 | Lemoine Serge | Device for the automatic delivery of fluid and pasty material incorporating automatic closing means |
US2866340A (en) * | 1955-09-06 | 1958-12-30 | Goldberg Moshe | Device for taking samples of liquid for testing |
US2960868A (en) * | 1957-12-23 | 1960-11-22 | George E Price | Pipette pump |
US3811603A (en) * | 1968-04-15 | 1974-05-21 | Hynson Westcott & Dunning Inc | Dropper and stirrer dispensing a single drop |
US3786683A (en) * | 1972-09-12 | 1974-01-22 | Alphamedics Mfg Corp | Hand-operated pipette |
US4367754A (en) * | 1979-04-02 | 1983-01-11 | American Hospital Supply Corporation | Method of dispensing a blood sample |
US5114679A (en) * | 1990-08-27 | 1992-05-19 | Eastman Kodak Company | Method of using a pipette |
US5406856A (en) * | 1991-12-17 | 1995-04-18 | Eppendorf-Netheler Hinz | Pipetting apparatus |
US5445797A (en) * | 1994-06-14 | 1995-08-29 | Flesher; Robert W. | Micro-pipettor assembly |
WO2019206944A1 (en) * | 2018-04-26 | 2019-10-31 | Robert Bosch Gmbh | Device and method for preparing sample material |
CN111989048A (en) * | 2018-04-26 | 2020-11-24 | 罗伯特·博世有限公司 | Apparatus and method for preparing sample material |
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