Economical yet strong and durable. 8 but illustrating the lower end of the blank within the die after the lower end has been inflated and thereby the finished shape of bulb attained; FIG. This type of vise also facilitates easy loading of the thermometer blank into and unloading of the thermometer blank from the chuck 18. In this patent the bulb of the finished thermometer was in one piece with the glass of the stem. 
a calibration point which is most commonly the ice point. 
Related Products: Mercury Filled Thermometer, Red Spirit Filled In Enclosed and Armor Aluminum Cases Aluminum Cases have Pocket Clips Length 6" (155mm) Permanent Markings Toughened Bulbs Total Immersion Thermometers Replacable, Related Products: Total Immersion Thermometer, Use this simple apparatus to measure relative humidity. Slide rule range is, humidity readings anywhere by comparing the reading of the wet and dry bulb thermometers on the enclosed humidity chart. Reading temperature via liquid-in-glass thermometers call for brilliant eyesight. These particles tended to enter the capillary bore during loading of the thermometer and also use of the thermometer, thereby creating thermometers known as "hard shakers", these being thermometers in which the mercury column would not readily recede after using the same to measure a temperature even when they were whipped quite rapidly. We promise not to spam you. It equally well could have been the configuration of an oral type thermometer. temperature stem thermometer gauge thermometers brass pocket gauges oilybits types as grooves, threads or mouths by blowing, Thermometers specially adapted for specific purposes, Clinical contact thermometers for use with humans or animals, Measuring temperature based on the expansion or contraction of a material the material being a liquid with provision for expansion indicating over not more than a few degrees, GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS, TECHNICAL SUBJECTS COVERED BY FORMER USPC, TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS, Method of making a clinical monocoque glass thermometer, Thermometer and method for its manufacture, Thermometer bubble pressing and blowing machine, Overflow machine is again used in mercury clinical thermometer production, Method of and apparatus for making tubing, Glass syringe barrel forming method and machine, Method and device for the production of foreign body-free glass vessels, in particular ampoules, injection bottles and the like. Various types ofmercury-in-glass thermometersare available. 
21, 1974, now U.S. Pat. 4 is an enlarged view of the thermometer blank and spring-loaded pins shown in FIG. The contraction chamber affords the person taking a temperature reading a little time to get an accurate reading after removing the thermometer from a heated source. They provide very good repeatability and their calibration remains unaffected. It should be mentioned that the gas used is free of moisture and of any particles that might block the capillary bore or check movement of mercury therein or which might react with the mercury. 2. Ultimately, the strand breaks and the strand, including the portion of the former blank beneath it, drops to waste. A monocoque clinical glass thermometer which constitutes a glass stem and a bulb formed integrally therewith. It will be appreciated that the blank can be inserted into the vise first while the upper end of the blank is below the chuck, and that after the blank has been placed in the vise it can be moved longitudinally upwardly to engage the chuck. bimetal weksler npt 150f Fractional Distillation, The Main Factors That Cause the Air in Earth's Atmosphere to Move, Experiments With Kinetic Molecular Theory. thermometers thermometer stem The clinical monocoque glass thermometer of the present invention is formed by a method which includes making a thermometer by starting with a glass blank. The lower end 45 of the stem of the remaining part of the glass blank still is hot. The portion of the strip in the wall of the bulb is a straight continuation of the balance of the strip and is not twisted. They can be frequently applied in areas where there is problem of electricity. A clinical glass thermometer having a stem of triangular cross-section, a capillary bore extending lengthwise within said stem, an opaque strip embedded within said stem and extending longitudinally thereof, and a bulb of circular cross-section, said bulb having side walls and a bottom wall formed integrally with said stem from a single piece of glass, a portion of said opaque strip extending into a side wall of said bulb, said portion of said strip in said side wall being a straight continuation of the balance of said strip in said stem, said side walls of said bulb having a thickness approximately equal to the thickness of said bottom wall, said side walls of said bulb joining said stem with no abrupt reduction of wall thickness. The method disclosed by Chaney had the serious defect that the cavity left flash marks on the bulb which, of course, was no particular problem insofar as Chaney was concerned because a commercial thermometer never is intended to be inserted into a body orifice, so that the flash on the bulb never created an irritation as it would have if it were on a bulb in a clinical thermometer. The person must shake the thermometer to get it to read below the temperature just taken. These thermometers have a small indicator ring that denotes the depth to which the thermometer should be, All Sper Scientific immersion thermometers are made with safe red liquid to SAMA specifications for ranges and accuracy. .[. How to Explain Simple Vs. Attention also is directed to the fact that the position of the apex of the tip 45 is above the bottom of the cavity 51.
However, the bulb is circular in cross-section, this, too, having been mentioned earlier. Dual scales of -10/50C and , All complete units supplied with a buret, a CG-3502-04, -10 to 260 thermometer, a CG-1042-01 24/40 thermometer adapter and a leveling bulb with a 24/40 top outer and a lower detachable hose connection. Omega Engineering: Introduction to Glass Thermometers, Purdue University: Mercury Thermometers FAQ. The thin bore is called a capillary. A typical liquid-in-glass thermometer is shown in the figure below. The rounded front corner of the thermometer blank enters between the pins 23, 24 and the side walls of the blank cam apart the pins as the blank enters the slot 26. Liquid element contained in a glass thermometer may be perilous or risky to health owing to their potential chemical spills. Gases and air inside the capillary must have a place to collect as mercury rises. This new position is not indicated because it is not critical to the understanding of the invention. Available with Vigreux indentations to improve efficiency. grower Related Products: Non Mercury Thermometer. 11) and there heated and annealed and slowly cooled to leave a negligible residual stress which in the thermometer art is considered to be essentially absent. Here, too, two dies are illustrated inasmuch as in the machine shown blanks are being operated upon in pairs. 3 and 4, it is basically of triangular shape with rounded corners at the back of the thermometer which is the portion wherein the strip is embedded and it also has a rounded corner at the front of the thermometer. 9; and.
As temperatures increase, mercury moves out of the bulbs reservoir. Environmental concerns about mercury are prompting manufacturers to look for substitute materials, but many mercury thermometers are still in use. The block is positioned behind a protective screen, which speeds heating and, Related Products: Melting Point Apparatus, Thomas Scientific 2022 All Rights Reserved. By way of example, the heating and annealing can be carried out by raising the temperature of the thermometer from room temperature to between 660 F. and 860 F. or, more specifically, for the glass mentioned, to 820 F. in 30 minutes, holding the thermometer at this temperature for approximately 2 hours which conventionally suffices to stress relieve the thermometer to a commercially acceptable degree. 
Like., made of glass tubes, Method and means for forming a thermometer bulb, Hollow body such as a golf-club head, made of molded thermoplastic material comprising an imprisoned insert, and method for the manufacture thereof, Method and apparatus for forming hollow glass articles, Process improvements for preparing catheter balloons, Orientation blow molding method and device of large-scale vessel, Method of and apparatus for producing baseball bats, Process for the production of oriented hollow bodies, Manufacture of biaxially oriented plastic bottle, Method and apparatus for molding hollow glass articles, and articles formed thereby, Method of making hollow glassware with a stem and a foot, Blow molding method and molding die thereof, Method of forming thin-walled glass articles, Manufacturing method of hollow molded body and injection stretch blow molding machine, Means for producing openings of predetermined size on glass bodies, Method for manufacturing saturated polyester bottles, Method and apparatus for making hollow glassware and objects made thereof, Tool for making hollow articles by counter-pressing method, Method for molding hollow and bottomed glass articles, Method for molding glass tube having bottom. In the accompanying drawings in which is shown one of the various possible embodiments of the invention: FIG. It is sufficient to observe that the mechanism 19 in one position will tighten the chuck on the upper end of the blank and in another position will release the chuck. The importance of this will be pointed out subsequently. When 660 F. is reached, the cooling can be more rapid, for example, 100 F. per hour. This end is subjected to heating with a flame that concentrates its heat to a point above the lower tip of the blank. thermometers stem bi metal models heads 10 is a sectional view taken substantially along the line 10--10 of FIG. Referring now in detail to the apparatus shown in FIG. Magnified glass makes reading the mercury level easier. The first has a relatively long and cylindrical shaped bulb and is known as the oral type. It is heated approximately 1/2 inches from the lower end 38 thereof (see FIG. Further blowing causes the now-forming bulb to move downwardly as well as outwardly in the lower portions thereof, thereby reducing the amount of empty space between the undersurface of the aforesaid tip and the bottom part of the die cavity. They can not be applied in regions where highly accurate results are desirable. 
Immersion is measured from the bottom of the joint to the bottom of non-mercury bulb. Each die 52 is a non-split die, that is to say, it does not consist of two sections which are moved toward and away from each other, in the closed, i.e., abutting, position to form a cavity inasmuch as such a cavity would, when a glass hollow bulb is blown therein, permit the glass to enter into the operating zone between the two die halves thereby creating flash which would defeat the very purpose of a clinical thermometer, to wit, the ability to insert the same in a body orifice lined with tender mucous membranes. This pocket ultimately will become the interior of the bulb of the finished thermometer. The minimum distance is set at 4-1/2" (114mm). Immersion is measured from the bottom of the joint to the bottom of the bulb. Subsequently, the thermometer with the formed bulb thereon is charged with mercury, has thermometer graduations placed on the stem, has the quantity of mercury adjusted to conform to the thermometer, is evaculated and closed, the sequence of steps subsequent to the formation of the bulb varying with the manufacture and depending upon the particular methods employed for charging, forming the markings, closing and evacuating the upper end of the thermometer and adjusting the quantity of mercury therein. 
thermometer industrial stem angle adjustable brass A thin bore inside the stem gives mercury a route of travel as it expands and contracts. Terms & Conditions, Thomas Traceable Dew Point/Wet Bulb/Humidity/Thermometer, "Accutherm" Bulb Immersion Thermometers - Spirit, Bluetooth Thermometer Hygrometer Data Loggers, Heat Stress WBGT (Wet Bulb Globe Temperature) Meter, Pocket Test Thermometers, Aluminum Case, Red Spirit Filled, H-B DURAC, Liquid-In-Glass Wall Thermometer; Organic Liquid Fill, SYNTHWARE Short Path Vacuum Jacketed Distillation Apparatus, Pocket Test Thermometers, Clear Plastic Case, Red Spirit Filled. The Clamp Hook locks into any position to support suspended thermometers, drying tubes and potash bulbs. The bottom wall no longer is unusually thick to create a bull's-eye lens effect which was common in previously manufactured thermometers. 1, by tubes 32 and brackets 34, respectively.
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