The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 26, 1979
Filed:
Jul. 27, 1977
Paul Beckman, Tarrytown, NY (US);
Other;
Abstract
An improved thermometer which is case hardened and includes a total enclosure composed of a pair of first and second layer members covering the stem portion and the bulb portion respectively of the thermometer. A substantially transparent plastic material layer member covers the stem portion of the improved thermometer and has an index of refraction which is sufficiently high to allow a user to visually interpret the location of an internally contained heat expandable substance in relation to indicia formed on the stem portion. Additionally, the first layer member is irradiated from a source of soft Beta rays for hardening the outer surface layer of the first layer member. The bulb section of the improved thermometer is enclosed by a second thermally conductive layer member. Both the first and second layer members are joined to form a total enclosure for the thermometer throughout the extended length of both the bulb and stem portions. Additionally, an increased amount of substantially transparent plastic material is added to the terminal end of the stem portion of the improved thermometer in order to provide a cushioning effect under dynamic load when the thermometer inadvertently falls to an external surface.