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.)
Expired
Application number
GB11877/57A
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.)
Hamilton Watch Co
Original Assignee
Hamilton Watch 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 Hamilton Watch CofiledCriticalHamilton Watch Co
Publication of GB837842ApublicationCriticalpatent/GB837842A/en
G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
G04C3/04—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance
G04C3/06—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance using electromagnetic coupling between electric power source and balance
Landscapes
Physics & Mathematics
(AREA)
Engineering & Computer Science
(AREA)
Electromagnetism
(AREA)
Power Engineering
(AREA)
General Physics & Mathematics
(AREA)
Thin Magnetic Films
(AREA)
Abstract
837,842. Electric watches. HAMILTON WATCH CO. April 11, 1957 [April 17, 1956], No. 11877/57. Drawings to Specification Class 139 The subject-matter of this Specification is to a large extent described in Specification 837,843 but the magnets are stated each to have a coercive force of no less than 750 oersteds and a flux density at the centre of no less than 1000 gauss.
Improvements in or relating to ferromagnetic ferrite materials onthe basis of nickel (zinc) ferrite, methods of producing such materials and magnetic cores made from these materials
Improvements in or relating to ferromagnetic ferrite materials onthe basis of nickel (zinc) ferrite, methods of producing such materials and magnetic cores made from these materials