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 |
|---|---|---|---|---|---|---|
| 221 | Transporter | US24830051 | 1951-09-26 | US2725970A | 1955-12-06 | AUGUST WULLSCHLEGER |
| 222 | Nonpulsating and vibrationless conveyer | US18940550 | 1950-10-10 | US2698078A | 1954-12-28 | HARRISON HOMER S |
| 223 | Interrupted continuous conveyer | US23235351 | 1951-06-19 | US2671552A | 1954-03-09 | MILLER WILLIAM C |
| 224 | Conveyer drive shear pin assembly | US25549251 | 1951-11-08 | US2665570A | 1954-01-12 | REAM GORDON A |
| 225 | Safety stop device | US11115849 | 1949-08-19 | US2652914A | 1953-09-22 | CHRISTENSEN ALFRED C |
| 226 | Fan type elevator for chopped material | US74505847 | 1947-04-30 | US2630351A | 1953-03-03 | HANSEN CHARLES W |
| 227 | Speed control of conveyer drives | US24657951 | 1951-09-14 | US2625257A | 1953-01-13 | SCHENK ADELBERT J |
| 228 | Control apparatus for conveyer systems | US14631550 | 1950-02-25 | US2614684A | 1952-10-21 | DANIELS HERBERT E |
| 229 | Work feeding and positioning mechanism | US72857547 | 1947-02-14 | US2580795A | 1952-01-01 | KITCHELL EDEN T |
| 230 | Intermittent variable-speed drive mechanism | US62303645 | 1945-10-18 | US2552246A | 1951-05-08 | WILCKENS EIBE A; MAGILL ELLIS M |
| 231 | Endless belt conveyer drive | US74591547 | 1947-05-05 | US2528865A | 1950-11-07 | DALE GEORGE R |
| 232 | Electrical control system for plural conveyer organization | US63556245 | 1945-12-17 | US2510163A | 1950-06-06 | WOOD CLAUDE O |
| 233 | Safety apparatus | US55026044 | 1944-08-19 | US2472914A | 1949-06-14 | MERCIER STANLEY M |
| 234 | Power transmission | US6388836 | 1936-02-14 | US2402777A | 1946-06-25 | ROSE EDWIN L; TWEEDALE RALPH L; WILLIAM THOMAS; FRANKLAND EARL M |
| 235 | Conveyer | US48932543 | 1943-06-02 | US2390302A | 1945-12-04 | BJARNE HENRICKSEN |
| 236 | Conveyer control | US52493744 | 1944-03-03 | US2371956A | 1945-03-20 | DEES ALFRED F |
| 237 | Conveyer construction | US45114142 | 1942-07-16 | US2361131A | 1944-10-24 | SMITH LEWIS E |
| 238 | Automatic stop for belt conveyers | US49737243 | 1943-08-04 | US2345415A | 1944-03-28 | NAGY JR ANDREW |
| 239 | Conveyer drive for loading machines | US46985342 | 1942-12-22 | US2340509A | 1944-02-01 | CLARKSON JOHN L |
| 240 | Conveyer | US37594641 | 1941-01-25 | US2333926A | 1943-11-09 | HAPMAN HENRY W |
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