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US 4,093,954 AGranted
Motion recorder indicator
OwnerRichard H. Prewitt, Jr., Richard H. Prewittinventors
Life of this patent
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OwnerRichard H. Prewitt, Jr., Richard H. Prewittinventors
Estimating the term…
A recorder-indicator which mechanically magnifies strain or movement using special flex pivots. The lever system is activated by the motions being recorded or observed. A pointer indicates the strain or movement. It also marks or scribes a record of maximum movement on a recording medium having a scale. The recording media may be placed in a slide for projecting the recorded data and scale on a screen for enlargement. The recording media may be moved in the "Y" direction by one of several means to separate events recorded in the "X" direction. One of the features of the invention is the type of flex pivots that are suitable for small angular motion with minimum distorsion under high load. These pivots may be placed close to each other without interference. Other species of flex pivots are inexpensive to manufacture and still other flex pivots are suitable for relatively large loads and angular movements. The amplified motion is also used to activate limit switches.
An instrument comprising a first and second support means, marking means actuated by movement between said first and second support means, a target for recording the movement between said first and second support means, said target being mounted on said second support means, said marking point engaging said target and attached to a lever comprising a thin flat sheet of material attached to said second support means through a flat flex pivot, said flex pivot formed in said flat sheet by removing material to form a hub and spokes.
A claim according to 1 including
An instrument comprising first and second support means, a target for recording the movement between said first and second support means, said target being slideably mounted on said second support means, a lever system including a marking means activated by motion between said first and second support means, said lever system having flex pivots, said marking means engaging said target, said lever system comprising a first and second lever;
An instrument for recording strains or movements comprising a first and second support means;
Dependencies are inferred from the claim text.