Time stopper tube

Bar code.If a frozen specimen is not required, it is not necessary to transfer serum to a plastic transport tube. Unless otherwise indicated, serum specimens may be sent at room temperature.When frozen serum is required, transfer the serum using a pipette into a plastic transport tube. Follow the steps in Frozen Serum.Plasma Preparation. When plasma is required, follow these steps.1. Always use the proper vacuum tube for tests requiring a special anticoagulant (eg, EDTA, heparin, sodium citrate, etc) or preservative.2. Tap the tube gently to release additive adhering to the tube or stopper diaphragm. (See Figure 11.)Figure 113. Permit the vacuum tube to fill completely. Failure to fill the tube will cause an improper blood-to-anticoagulant ratio and yield questionable and/or QNS test results.4. To avoid clotting, mix the blood with the anticoagulant or preservative immediately after drawing each sample.5. To allow adequate mixing, slowly invert the tube eight to ten times (four times for citrate tubes) using a gentle wrist rotation motion.6. Immediately centrifuge the specimen for as long as 10 minutes or as specified by the tube manufacturer. Do not remove the stopper.7. Turn the centrifuge off, if not an automatic turn off, and allow it to come to a complete stop. Do not stop it by hand or brake. Remove the tube carefully without disturbing the contents.8. Remove the stopper and carefully aspirate plasma, using a separate disposable Pasteur pipette for each tube.9. Place the tip of the pipette against the side of the tube, approximately ¼ inch above the cell layer. Do not disturb the cell layer or carry any cells over into the pipette. Do not pour off; use transfer pipette.10. Transfer the plasma from the pipette into the transport tube. Be sure to provide the laboratory with the amount of plasma specified.11. Label all tubes

Both the sound-waves that are defiectedby thecrown and those that enter through the reentrant tube, and a stopper for the reentrant tube comprisin a plug F and a cone G attached thereto, su stantially as set forth. An ear-trumpet comprising a shell having an open receiving end for the soundwaves and the opposite end shaped to deflect the sound-Waves and a closed reentrant shell passing into a sound-conducting tube to conduct the sound-waves to the ear, substan-' tially as set forth. An ear-trumpet comprising a shell having one end open and its opposite end formed into a deflecting-crown; a reentrant art'attached to the crown end of the shel and a sound-conducting tube extending into the shell, its inner portion surrounding and being substantially concentric with the said re'e'ntrant part of the shell and having the'open end 0 the sound-conducting tube arranged toreceive the sound-waves deflected by the crown portion of the shell, substantially as set fort I CHRlSTOPHER W. LEV ALLEY. W itnesses 'WM. 0. Farm, Landscapes Health & Medical Sciences (AREA) Life Sciences & Earth Sciences (AREA) Biomedical Technology (AREA) Acoustics & Sound (AREA) Biophysics (AREA) Otolaryngology (AREA) Psychology (AREA) Engineering & Computer Science (AREA) Physics & Mathematics (AREA) Heart & Thoracic Surgery (AREA) Vascular Medicine (AREA) Animal Behavior & Ethology (AREA) General Health & Medical Sciences (AREA) Public Health (AREA) Veterinary Medicine (AREA) Orthopedics, Nursing, And Contraception (AREA) Description PATENTED JULY 31, 1906. 0. W. LEVALLEY. EAR TRUMPET. APPLICATION FILED SEPT. 18. mos. Quezon: cal ' and UNITED S AT S PATENT OFFICE. CHRISTOPHER W. LEVALLEY, F MILWAUKEE, WISCONSIN. ' i EAR-TRUMPET. To all whom it may concern: Be it known that I, CHRISTOPHER W. LE- VALLEY, a citizen of the United States, residing at Milwaukee, in the countyof Milwaukee, Wisconsin, have invented a new and use-- reentrant tube of the instrument having inserted therein a stopper. Fig; 4 is a side view of the stopper removed. Fig. 5 is a plan view ofthe same, and Fig. 6 is a view in elevation of the two parts of the stopper separated. The ear-trumpet to which I have applied my 1m rovements is in its general construc-" tion 0 a type well known. It consists of a sound-receiving shell A of bell shape and a conducting-tube B, leading from the shell rovided at its end with an ear-tip b. The aring end of the shell is left open'to receive

A shell having one end 0 en and its opposite end formed into a defiect1ng-crown, the crown end of the shell being also open for the direct passage of sound waves, and a sound-condncting tube extending into the shell and having its open end. arranged posite to the deflectingcrown of the shel and also the opening in the crown end thereof, substantially asset forth. 4. An ear-truinpet comprising a shell, a sound--conducting tube extending into the interior of the shell, and an open reentraxit tube leading ihom'one end of the shell into the said sound-conducting tube, substantially as set forth. 5. An ear-trumpet comprising a shell having one end open and its opposite end formed into a defiec'ting-crovm,a reentr-ant 0 en- Waves entering through either end of the shell, and a stopper for closing one of the said openings, substantially as set forth. 7. In an ear-trumpet comprising a shell having one end open and its opposite end formed into a sound-defiectin' crownv an open rentrant tube connecte with said crown, a sound-conducting tube extending into the shell and having its inner open en arranged to receive the sound-waves deflected by the crown portion of the shell and those entering through the rentrant tube, and a stopper arranged to close the reentrant tube, substantially as set forth. 8. An ear-trumpet comprising a shell open at one end and having its oppositeend formed to produce a sound-deflecting crown, an open rentrant tube connected with the said crown end of the shell and extending thereinto, a sound-conductin tube the inner end of which enters the shel and is arranged to receive both the sound-waves that are defiectedby thecrown and those that enter through the reentrant tube, and a stopper for the reentrant tube comprisin a plug F and a cone G attached thereto, su stantially as set forth. 9. An ear-trumpet comprising a shell having an open receiving end for the soundwaves and the opposite end shaped to deflect the sound-Waves and a closed reentrant shell passing into a sound-conducting tube to conduct the sound-waves to the ear, substan-' tially as set forth. 10. An ear-trumpet comprising a shell having one end open and its opposite end formed into a deflecting-crown; a reentrant art'attached to the crown end of the shel and a sound-conducting tube extending into the shell, its inner portion surrounding and being substantially concentric with the said re'e'ntrant part