APPARATUS FOR FIRING CERAMIC SPARKPLUG INSULATORS

• Main Author: DUFFNER J,DT
• Format: Patent
• Language: English
• Published: 08.01.1974
• Subjects: BASIC ELECTRIC ELEMENTS; BLASTING; CORONA DEVICES; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; ELECTRICITY; FURNACES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES; HEATING; KILNS; LIGHTING; MECHANICAL ENGINEERING; OVENS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; RETORTS; SPARK GAPS; SPARKING PLUGS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; WEAPONS

Apparatus for firing sparkplug insulators comprises a jig having an apertured bottom wall. A pin having a free end and a collar situated adjacent the latter is arranged to move vertically from below the bottom wall through a respective aperture therein. A sleeve slidably mounted on the pin is introduced into the aperture to be expanded therein in response to a further upward movement of the pin beyond the point at which a stop prevents the sleeve from moving upwardly, and thus to center the pin in respect to the aperture. The free end of the pin engages the central hole of an insulator, the extent of penetration into the latter being limited by the collar and the pin with the thus centered insulator is then moved downwardly so as to introduce the insulator into the aperture, while the collar prevents the sleeve from enclosing the free end of the pin.