Recorders – Record tracer movement responsive to inertia or mass...
Patent
1975-10-14
1979-12-25
Miller, Jr., George H.
Recorders
Record tracer movement responsive to inertia or mass...
346124, 346136, 242179, 242198, G01D 900, G01D 1516, G01D 1524, G03B 104
Patent
active
041808215
ABSTRACT:
An instrument attached to a workpiece at two separated locations or between two members to record movement. It is a mechanical strain or motion recorder. It is driven by the strains or movements being recorded. The record of the movements is made on a cassette type tape. The movements on the tape are modified. Likewise, the motion that advances the tape may also be modified. When these movements are magnified it permits using shorter gage lengths for a given magnitude of movement or unit strain. Enlarging the recorded data simplifies digitizing the record. The unit may be advanced either by one stroke or by both strokes of the strain cycle. The invention includes an arrangement of tape spools and a recording back-up disc or plate which gives a low profile. The tape is guided against a fixed reference side but an added scribe or marker is provided for use with equipment which employs an additional base line for digitizing the recorded data. Low profile flex pivots are used in the lever system which magnifies the strain or movement. Thin wheel flex pivots are used to modify the movement which drives the tape. Provision is made for temperature compensating and for reversing the movement of the instrument.
REFERENCES:
patent: 3618115 (1971-11-01), Parsazad
patent: 3725948 (1973-04-01), Prewitt et al.
patent: 3825934 (1974-07-01), Price et al.
patent: 3906511 (1975-09-01), Kelemen
Prewitt Richard H.
Prewitt, Jr. Richard H.
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