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US 2015/0084935 A1Published application
Electromagnetic and capacitive pointer
AssigneeWaltop International Corporation
InventorCHIEN-CHIA LIEN
Life of this patent
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Abstract
An electromagnetic and capacitive pointer is disclosed. The electromagnetic and capacitive pointer comprises a tube assembly and a conductive tube assembly, a first and a second ferrite cores, an non-magnetic and conductive pin, a control circuit board, a conductive pin holder and a holder. The non-magnetic and conductive pin, the conductive pin holder, the holder, the control circuit board and the conductive tube assembly constitute a conductive path.
Claims10
An electromagnetic and capacitive pointer, comprising:
- a tube assembly and a conductive tube assembly;
- a first ferrite core and a second ferrite core;
- an non-magnetic and conductive pin penetrating through the first ferrite core and the second ferrite core and being moveable through the first ferrite core;
- a control circuit board connecting a coil winding the first ferrite core to form a resonance circuit;
- a conductive pin holder, the second ferrite core and one end of the non-magnetic and conductive pin being sheathed in the conductive pin holder;
- and
- a holder, the conductive pin holder and one end of the control circuit board being sheathed in the holder, the holder having conductive layers on surfaces between the holder and the control circuit board and the conductive pin holder, the other end of the control circuit board having a conductive contact and being sheathed in and contacting the conductive tube assembly;
- wherein the non-magnetic and conductive pin, the conductive pin holder, the holder, the control circuit board and the conductive tube assembly constitute a conductive path.
5 more elements
Dependencies are inferred from the claim text.