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:
Feb. 21, 1978
Filed:
Feb. 02, 1977
George R Pariza, Schaumburg, IL (US);
Pittway Corporation, Northbrook, IL (US);
Abstract
A horn of improved, compact and efficient construction, formed of a minimum of components, is characterized by an electromagnetic coil within a closely confining magnetically permeable housing having an open end and relatively imperforate wall areas, a diaphragm positioned over and closing the open end, a striker operatively associated with the coil for repetitively striking the diaphragm to generate noise, and a cover having a sound directing port positioned over the diaphragm and forming therewith a sound chamber for directing generated noise toward and out of the port. The horn is thus formed of a small number of parts and is very economical. The housing itself serves as the electromagnetic flux path for the coil, and therefore reduces the number of parts and the number of manufacturing steps required in the production of the horn. At the same time, the relatively imperforate wall areas of the housing, together with maintenance of parallelism between the components of the horn, maximizes the noise generated by the horn.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile