Title: Method of manufacturing miniature incandescent lamps

Abstract: In the manufacture of miniature incandescent lamps having a pinched glass cap, an inert cooling gas is blown through the exhaust tube during the pinching operation so as to keep the exhaust tube open.

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Inventors: Gebhardt, Karl (Stolberg-Busbach an Kurths-Muhle, DT)

Application Number: 495916
Filing Date: 1974-08-08
Publication_date: 1976-01-13
Assignee: U.S. Philips Corporation (New York, NY)
Primary Class(es): 65/32.2 65/34, 65/36, 65/152
Other Classes:
US Patent Ref:

1398033	Nov, 1921	Maurer	65/34.
1448351	Mar, 1923	Kirlin	65/34.
2006568	Jul, 1935	Gustin et al.	65/34.
2945327	Jul, 1960	Malm et al.	65/43.
3409342	Nov, 1968	Anderson et al.	65/32.
3505050	Apr, 1970	Husto, Jr.	65/34.
3688812	Sep, 1972	Fredericks	65/34.
3798491	Mar, 1974	Malm	65/34.

Other Refs: 507,999261,398

Dec, 1954	CA
Nov, 1925	UK

Primary Examiner: Lindsay, Jr., Robert L.
Assistant Examiner: Miga, Frank W.
Attorney: Trifari; Frank R.