发明名称 |
Micro-geophone |
摘要 |
A micro geophone having pole pieces do not extend out around the sides of the magnet, thereby allowing a reduced geophone diameter for a given magnet diameter. The pole pieces are adhesively bonded to the magnet using an adhesive, which may be made suitably electrically conductive by silver or nickel fillers or non-conductive by mica fillers such as borosilicate glass micro-spheres. Axial space is economized by eliminating traditional spider retaining rings. The spider springs are seated directly against the coil form and secured by adhesive fillets disposed on the outward-facing spring circumferences. The spider springs include circumferential notches to receive adhesive. A two-piece bimetallic coil form of aluminum and a heavier material, joined by adhesive, is provided. Headers are affixed to the housing within the seats by adhesive. A straight or rounded chamfer at each of the geophone ends allows the overall geophone dimensions to be maximized. |
申请公布号 |
US8976627(B2) |
申请公布日期 |
2015.03.10 |
申请号 |
US201213553634 |
申请日期 |
2012.07.19 |
申请人 |
Geospace Technologies, LP |
发明人 |
Woo Daniel M. |
分类号 |
H04R9/00;G01V1/38;G01V1/18;H04R9/02;H01F7/06 |
主分类号 |
H04R9/00 |
代理机构 |
Andrews Kurth LLP |
代理人 |
Bush Gary L.;Andrews Kurth LLP |
主权项 |
1. A geophone (110) comprising:
a magnet (114); a tubular coil form (130) disposed around said magnet (114) and movable in an axial direction with respect to said magnet, said coil form including a first bobbin formed of a first material connected to a second bobbin formed of a second material having a greater density heavier than said first material; and a coil (140, 142) wound about said coil form (130). |
地址 |
Houston TX US |