Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Singer Co
Original Assignee
Singer Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Singer CofiledCriticalSinger Co
Priority to ES0003100UpriorityCriticalpatent/ES3100Y/en
Publication of ES3100UpublicationCriticalpatent/ES3100U/en
Application grantedgrantedCritical
Publication of ES3100YpublicationCriticalpatent/ES3100Y/en
A lighting device for sewing machines, with a light bulb of relatively large energy and relatively small overall size, a lamp holder and a metal screen for the lamp, in the form of an inverted bucket, and a tubular sleeve for the lamp holder, which carries the lamp and the lamp holder, and removably mounted on one side of the central vertical plane of the gooseneck, characterized in that the lampshade and lampholder cover are fitted with a large part of their surface in direct driving contact of heat with the swan neck, by means of which a rapid circulation of heat is obtained through and from the screen and the sheath, to the swan neck, which functions as the main heat radiator. (Machine-translation by Google Translate, not legally binding)
ES0003100U1934-06-091934-06-09
Lighting device for sewing machines.
ExpiredES3100Y
(en)
New type of electric incandescent lamp in the vacuum, removable, allowing the replacement of any of its parts, including only the filament (Machine-translation by Google Translate, not legally binding)