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US 4,305,209 AGranted
Adaptor
AssigneePrecision International, Inc.
InventorTsunehisa Yamashita
Life of this patent
Estimating the term…
Abstract
An adaptor for mounting one instrument, such as an electronic distance measuring device, atop another instrument, such as a telescope or theodolite, for movement together about a horizontal axis with a base member attached to the upper device and presenting two downwardly facing cam surfaces and support members engaging the cam surfaces for vertical movement against springs to counteract the forces produced by the upper instrument as it pivots.
Claims11
An adaptor for mounting an instrument device on a stand and on a second instrument device for movement together with said second device comprising:
- a base member for connection on one side to said first device and having at least one cam surface on the opposite side thereof;
- and
- supporting means for connection to said stand and to said devices for coupling said devices together for pivotable movement of said devices about a horizontal axis, including a support member for mounting on said stand, and engaging said cam surface for relative movement with respect thereto and vertical movement as said devices are pivoted, compressible spring means engaging said support member and for mounting on said stand for applying a vertical force thereto in opposition to the vertical force applied by said cam surface to said support member, said vertical force applied by said spring means varying to counteract the change in force applied by said cam surface as said device is pivoted, and means for mounting said spring means and support member.
In combination:
- a first instrument device;
- a second instrument device;
- a stand;
- and
- means for mounting said instruments on said stand for pivotable movement together about a horizontal axis including an adaptor for mounting said first instrument device on said stand and on said second instrument device for movement together with said second device comprising:
- a base member for connection on one side to said first device and having at least one cam surface on the opposite side thereof;
- and
- supporting means for connection to said stand and to said devices for coupling said devices together for pivotable movement of said devices about a horizontal axis, including a support member mounted on said stand, and engaging said cam surface for relative movement with respect thereto and vertical movement as said devices are pivoted, compressible spring means mounted on said stand engaging said support member for applying a vertical force thereto in opposition to the vertical force applied by said cam surface to said support member, said vertical force applied by said spring means varying to counteract the change in force applied by said cam surface as said device is pivoted, and means for mounting said spring means and support member.
5 more elements
Dependencies are inferred from the claim text.