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Publication numberUS431132 A
Publication typeGrant
Publication dateJul 1, 1890
Filing dateOct 21, 1889
Publication numberUS 431132 A, US 431132A, US-A-431132, US431132 A, US431132A
InventorsJohn C. Wharton
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 431132 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)



No. 431,132. Patented July 1,1890.

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V I W ms NORWE Puma cm, mq-rourwm, wasnncmw, a. c.



SPECIFICATION fuming part of Letters Patent No. 431,132, dated July 1, 1890.

Application filed October 2 1, 1889. Serial No. 327,741. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN ORIDDLE WHAR- TON, a citizen of the United States, residing at Nashville, in the county of Davidson and State of Tennessee, have invented certain new and useful Improvements in Test-Tubes, of which the following is a specification.

My invention relates to improvements in test-tubes, whereby a roughened surface may be given to the outer side, and,when desired, the same part of the test-tube maybe stained or enameled. The roughening may be are oomplished by any suitable process, such as etching with acid, grinding, or by means of the sand-blast, &c. The enameling, when done, should precedethe roughening.

flhe drawing shows one of my improved test-tubes roughened on the part A.

The objects of this improvement are to provide a test-tube (or test-tubes) with a roughened surface, (or surfaces,) upon which marks or writing may be made with an ordinary pencil or other suitable instrument, in order to label the test-tube easily, to denote its contents during experimental or analytical Work, and to provide for the easy removal of the marks or labels after they have served their purposes; also, in certain cases to provide for greater Visibility of the Writing upon the tubes by enameling or staining the glass upon which the roughening process is to be performed.

This improvement is designed to furnish a useful substitute for paper labels, in not being liable to be scorched or burned, or to be effaced or obscured by the contact of acids, &c., which paper labels are incapable of withstanding, the paper labels being, moreover, more inconvenient to attach and remove when necessary.

The manner in which this improvement will alfect the test-tubes is clearly shown in the accompanying drawing, which is a View in perspective, the shaded band at the upper part of the tube representing the roughened or ground surface, as well as the portion enameled when the latter object is carried out.

Having thus fully described my in vention, what I claim, and desire to secure by Letters v Patent, is

1. A test-tube having a ground or roughened external surface, for the purpose specified, substantially as set forth.

2. A test-tube having a part or the whole of its external surface enameled and roughened or ground, substantially as described.

J. o. wnAnToN.


RUEE M. FIELDs, F. Roman.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2452385 *Dec 30, 1943Oct 26, 1948Frederick G MerckelColor comparison apparatus
US2888015 *Oct 18, 1956May 26, 1959Robt G GarlandColor divided hypodermic syringe
US3814522 *Feb 28, 1973Jun 4, 1974American Hospital Supply CorpSpecimen tube for microscopic examination
US3880012 *Jun 5, 1972Apr 29, 1975Wood Brothers Glass Company LiIntegral shaded area on single mark vessel to aid in view of meniscus
US4087154 *Nov 1, 1974May 2, 1978Propper Manufacturing Co., Inc.Glass slides with matted areas
US5019243 *May 2, 1989May 28, 1991Mcewen James AApparatus for collecting blood
US6315760May 9, 2000Nov 13, 2001Inviro Medical Devices Ltd.Syringe with a background for writing and reading index markings
USD770182 *Jul 1, 2013Nov 1, 2016Cyleen A. HunterFinger cot
Cooperative ClassificationB01L3/5082