Smith v. Bickford & Francis Belting Co.

Citations

• 221 F. 673
• 1914 U.S. Dist. LEXIS 1303

Syllabus

<p>Patents <§=>328—Validity and Infringement—Fire, Alarm.</p> <p>The Smith patent, No. 850,681, for a fire and temperature alarm for indicating a sudden, but not a gradual, rise in temperature, consisting of a small wire tube, closed at one end and haying the open end in a closed chamber, in which a sudden and unusual increase of pneumatic pressure, due to a sudden expansion of the inclosed air, makes an electrical contact with an alarm device, while a vent permits the air to pass in and out slowly upon a gradual and ordinary variation of temperature, was not anticipated, and discloses patentable invention; also held infringed.</p> <p><£=3>For other cases see same topic & KIOY-NUMBER in all Key-Numberod Digests & Indexes</p>