US317783A

US317783A - James j

Info

Publication number: US317783A
Authority: US
Publication date: 1885-05-12
Anticipated expiration: 1902-05-12

Description

- (No Model.)

J. J. HICKS. CLINICAL THERMOMETER.

Patented May 12, 1885.

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UNTTED STATES PATENT @rrrcn.

JAMES J. HICKS, OF HATTON GARDEN, COUNTY OF MIDDLESEX, ENGLAND.

CLINICAL THERMOMETER.

$PECIFICATION forming part of Letters Patent No. 317,788, dated May 12, 1885.

Application filed January 5, 1885.

ment manufacturer, have invented certain new and useful Improvements in Clinical Thermometers, of which the following is a specification.

The invention consists of improvements whereby the user of a clinical thermometer is enabled immediately to select the right line of View, while at the same time the divisions and figures are also made much more clearly visible.

My invention is applicable to the lens'front and to other descriptions of clinical thermometers.

Clinical thermometers as heretofore made have been formed of tubing drawn with a strip of white enamel along the back of the bore, but with the remainder of the tube of clear glass. This construction rendered it somewhat difficult for the user of a clinical thermometer, especially when formed with a lensfront, to select the right line of view,while the divisions and figures being engraved on the clear glass without any white enamel immediately under them it was in some cases difficult to see such divisions and figures.

According to my invention I form the tubing of which the thermometers are made with a strip of white or colored enamel extending all round the back and sides of the tubing, but

leaving only the narrow lens-front or line of sight of clear glass, thereby enabling the user to at once direct his eyes to the correct line of View. I also engrave the divisions and figures at the sides of the lens-front 1 orline of sight over the enamel, whereby such divisions and figures are made much more clearly visible than when engraved on the clear glass without any white enamel under the same.

My invention is represented in the accompanying drawings, in which Figures 1 and 2 are cross sections of clinical thermometers representing, respectively, alens-front clinical thermometer and an ordinary round-tube clinical thermometer; and Fig. 3 is a face View of part of the clinical thermometer shown in section at Fig. 2. These drawings, as will be (No model.)

seen, are made to a very large scale in order to show the invention clearly.

a represents the body of the thermometer,

which is made of clear glass. bis the bore and c is a strip of enamel extending all around the back and sides of the thermometer, except along only a narrow space, 0', which is of clear glass, which forms the correct line of sight through which the bore 12 is to be viewed. In Fig. 1 this space 0 of clear glass is immediately under the lens-front a and. thereby directs the user to the correct line through which the bore b can be seen through the lens-front a. In Fig. 2 there is no lens-front; but the space 0 of clear glass also directs the user to the correct line of sight.

The divisions and figures are engraved on the sides of the line of sight over the white or colored enamel, as shown, or in any other suitable manner.

In producing tubing to be employed in the manufacture of clinical thermometers of the character above described, I have found the following method of work to produce good results: The workman takes out of the glasspot on the end of his blow-tube or pontil a suitable quantity of metal, (clear glass.) He then rolls this lump until it assumes somewhat the shape of apear. An iron rodis then dipped into a pot containing white or colored enamel, and a suitable quantity of enamel is taken up on the end of such rod to form a thin coating thereof around the lump of clear glass. This lump of enamel while in a plastic state is rolled on a steel plate into suitable form, and while still connected with the rod it is flattened by forcing down thereon another steel plate. This sheet of enamel is then, if necessary, trimmed toa suitable shape to pass round the lump of clear glass on the blowtube, except along a narrow space longitudinally thereof. The lump of clear glass is then rolled on this sheet of enamel, so as to be cov* ered thereby except along a comparatively narrow line lengthwise thereof. The entire lump is then reheated, after which it is again rolled on the steel plate to insure the complete adhesion of the enamel to the lump of clear glass and to produce the desired shape. After this the workman blows through the blow-tube into the lump to produce a space ICO glass around the same.

therein. He then, if necessary, reheats the same and swings it in the air to elongate the glass, and consequently the bore. The bore at this stage being round, he now proceeds to roll the glass on the steel plate till he reduces the bore to the size desired before flattening the same. To flatten the bore he lays the tube onto a steel plate with its narrow clear face uppermost. He then brings another steel plate down onto the clear face and so flattens the bore that its widest face is seen through the face of clear glass. The workman now dips the enamel-coated flat tube into the pot containing clear glass and takes up sufficient metal thereon to form a thin coat of clear He then rolls it to make it perfectly round outside, after which he reheats it and the tubing is then drawn in the usual way.

The process as above described is employed to produce the section of tubing shown at Fig. 2. The same process is employed to produce the section of tubing shown at Fig. 1, except that just before drawing the tubing the front or face of clear glass is slightly pressed into a V-shaped mold to produce the lens-front. It is then reheated and the tubing drawn therefrom in the usual manner.

Although I have shown and described the enamel as embedded in the glass, and of one color throughout, it is evident that it may be placed on the exterior surface of the thermometer, and that. it may be partly white and partly colored, or of different colors, as desired.

' Having thus particularly described and as certained the nature of my said invention, and in what manner the same is to be performed, I declare that what I claim is 1. A glass body having a bore, an enamel strip extending around the back and sides of the body, concealing the bore, except along a narrow space forming the correct line of sight through which the bore is to be viewed.

2. A clinical thermometer comprising a glass body having a bore, an enamel strip extending around the back and sides of the body, concealing the bore, except alonga narrow space at front about the width of the bore, as magnified, a lens-front to the body, and divisions and figures at the sides of the narrow space over the enamel strip.

3. A clinical thermometer comprising a body, a, of clear glass surrounded by enamel 0, extending all around the back and sides of the tubing, except along a narrow space, 0, of clear glass forming the correct line of sight through which the bore 12 is to be viewed, and having the divisions and figures marked at the sides of such narrow space 0 over the enamel a, substantially as herein shown and described, and for the purpose stated.

JAS. J. HICKS.

Witnesses:

G. M. WHITE,

23 Southampton Buildings, London. JOHN D. VENN,

9 Gracechurch Street, London.