子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 181 | Load survey recorder including tape cartridge receptacle | US35255073 | 1973-04-19 | US3896488A | 1975-07-22 | CARNEY MURRAY C; HART DAVID G |
| The survey recorder is disclosed as being assembled in a rectangular shaped casing having a hinged cover. Stop means are provided on the hinge cover to prevent its closure in the event that the recording mechanism is not correctly engaged. An arm member which carries the recording head is pivotally mounted in the tape cartridge receptacle such that it can be swung down into operating engagement with the magnetic tape portion extending between the supply reel and the takeup reel of the tape cartridge. The tape recorder receptacle also has a plurality of alignment pins which correctly locate the tape cartridge relative to the recording head with respect to the horizontal, vertical and azimuth planes. A pressure roller is floatingly mounted on the outer end of the pivoted arm member so that when the arm member is brought down into its operating position the pressure roller will bear uniformly against the capstan to provide tape movement with improved alignment relative to the head in its movement therepast.
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| 182 | Simplified integrating motor | US3539921D | 1967-11-06 | US3539921A | 1970-11-10 | COHEN THEODORE A; RIORDAN HUGH E |
| 183 | Maximum demand register using constant speed drive for periodic subtractions proportional to momentary reading of demand indicator | US34760564 | 1964-02-26 | US3325732A | 1967-06-13 | BROWN ROBERT A |
| 184 | Integrating apparatus using a torque converter rebalanced by the output of a generator driven by the converter output | US10888561 | 1961-05-09 | US3128429A | 1964-04-07 | PATTEE JOHN R |
| 185 | Current measuring system | US54543755 | 1955-11-07 | US2896166A | 1959-07-21 | GILBERT ROSWELL W; MILLER JOHN H |
| 186 | Method and arrangement for measuring schedule deviations | US22803651 | 1951-05-24 | US2688728A | 1954-09-07 | CAROLUS JAMES B |
| 187 | Volt-ampere meter | US32162440 | 1940-03-01 | US2306129A | 1942-12-22 | LINCOLN PAUL M; PAINE LOUIS A |
| 188 | Demand totalizer | US24251127 | 1927-12-24 | US1872370A | 1932-08-16 | WAITE GRIFFIN G |
| 189 | Meter-controlled torque device | US37995229 | 1929-07-22 | US1793315A | 1931-02-17 | GREENE JAMES J |
| 190 | Meter | US5123825 | 1925-08-19 | US1760646A | 1930-05-27 | ALFRED HERZ |
| 191 | Electrical measuring instrument | US23150227 | 1927-11-07 | US1699807A | 1929-01-22 | PIERCE RAYMOND T |
| 192 | Electrical measuring instrument | US650225 | 1925-02-03 | US1669572A | 1928-05-15 | CARL OMAN |
| 193 | Method and means for measuring volt amperes | US6465925 | 1925-10-24 | US1641654A | 1927-09-06 | JUZI YUYAMA |
| 194 | Electric meter | US15549826 | 1926-12-17 | US1637049A | 1927-07-26 | PRATT WILLIAM H |
| 195 | Measuring device in the connecting line between two electric power stations working in parallel | US73323524 | 1924-08-20 | US1585326A | 1926-05-18 | WILLI BEUSCH |
| 196 | Electricity meter | US29381519 | 1919-04-30 | US1481335A | 1924-01-22 | MARIO ANNINGER |
| 197 | Electric meter. | US1900014535 | 1900-04-27 | US690450A | 1902-01-07 | MEEKER GEORGE H |
| 198 | Electric meter | US576240D | US576240A | 1897-02-02 | ||
| 199 | Electric-current meter | US509750D | US509750A | 1893-11-28 | ||
| 200 | Electric meter | US454949D | US454949A | 1891-06-30 | ||
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