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Individual
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Individual
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Publication of DE681838CpublicationCriticalpatent/DE681838C/de
G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
G01C17/02—Magnetic compasses
G01C17/04—Magnetic compasses with north-seeking magnetic elements, e.g. needles
G01C17/10—Comparing observed direction with north indication
G01C17/12—Comparing observed direction with north indication by sighting means, e.g. for surveyors' compasses
Landscapes
Engineering & Computer Science
(AREA)
Radar, Positioning & Navigation
(AREA)
Remote Sensing
(AREA)
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Making Paper Articles
(AREA)
Bag Frames
(AREA)
Auxiliary Devices For And Details Of Packaging Control
(AREA)
Description
Hierzu ι Blatt Zeichnungen.
BERUtT. GEDRUCKT Bt DER REICHSDRÜCKEREI
Claims (1)
Patentanspruch:
Bussolentäschchen, dadurch gekennzeichnet, jdaß eine Steckereinrichtung (5, 7) für
Libellen vorgesehen ist, die gleichzeitig in Verbindung mit der Bussole als Visiereinrichtung
dienen kann, und daß außerdem ein Stativanschlußgewinde (6) angeordnet ist.
Lichtempfindliche Einrichtung, bei der eine belichtete und eine unbelichtete Selenzelle gemeinsam von einer gegen ploetzliche Temperaturaenderungen schuetzenden Umhuellung umgeben sind