发明名称 |
Brake system for focal plane shutters of photographic cameras |
摘要 |
A focal plane shutter for a photographic camera has a brake system for braking the movement of shutter elements just before they reach their end or stop positions. At least one first brake element has a nearly constant braking torque, and at least one second brake element has a braking torque that increases over the distance of the braking movement. The constant and the increasing braking torques of the first and second braking elements are combined and applied to moving elements of the shutter, and both the constant and the increasing braking torques of the first and second brake elements are independently adjustable and settable.
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申请公布号 |
US4110773(A) |
申请公布日期 |
1978.08.29 |
申请号 |
US19770815368 |
申请日期 |
1977.07.13 |
申请人 |
ROLLEI-WERKE FRANKE & HEIDECKE |
发明人 |
SCHOLZ, ERWIN |
分类号 |
G03B9/36;G03B9/18;(IPC1-7):G03B9/08 |
主分类号 |
G03B9/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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