| 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 | Thread saver control | US540431 | 1983-10-11 | US4470362A | 1984-09-11 | Jerry S. Kear |
| A combination stitching system including a pneumatic sensing apparatus which operates to assure the presence of a material to be stitched is in a proper location before machine operation is possible is disclosed. The combination system comprises a machine (10) for stitching or sewing a material (30) with thread (26). At least one reciprocating needle (12) receives thread (26) through an aperture (28) for stitching the material (30). A power source (20) is connected by a drive linkage (18) which includes a clutch (21) and which provides reciprocating motion to needle (12). The clutch (21) operates to selectively connect and disconnect the power source from the reciprocating needle (12) by means of an activating means (22). To assure that the reciprocating needle operates only when a work piece (30) is in a position to be stitched, there is also included a pneumatic sensing apparatus (32). Pneumatic sensing apparatus (32) includes a source of pressurized air (34) which is connected to a air gap means (38), an air jet nozzle (40), and a control valve (42). The air gap means (38) operates so that a stream of air is ejected across an open area of the air gap means such that pressurized air from source (34) is provided through the air gap means to the control valve (42). When the air pressure is provided to control valve (42), air pressure is then made available to the actuating means (22) to activate the clutch (21). Air jet nozzle (40) is located in position so that a high pressure jet of air (64) is directed to impinge upon the air stream (50) of air gap means (38). | ||||||
| 182 | Heat sink for an appliance circuit board | US670779 | 1976-03-26 | US4004528A | 1977-01-25 | Kenneth Douglas Adams; Edward Walter Ostapczuk |
| A heat sink arrangement for a circuit board in a sewing machine which supports the circuit board for ready disassembly therefrom, and makes use of the sewing machine frame as an additional heat sink. The circuit board is riveted to an aluminum heat sink member which carrys the power transistors in a manner to provide good thermal conductivity thereto but electrically isolated therefrom by mica laminae. An aluminum bracket firmly affixed to the sewing machine frame for good thermal conductivity has a large area planar surface thereof contiguous a similar large area planar surface of the heat sink member. A clamp member which extends through a slot in the bracket has a pair of upstanding arms with reentrant angles which touch the surface of the heat sink member opposite the large planar surface. The surface of the bracket opposite the large planar surface is formed with a cylindrical surface at an angle to coact with a cone pointed screw carried by the clamp member. As the cone pointed screw bears against the cylindrical surface of the bracket, the heat sink member and the bracket are brought into intimate contact for good thermal conductivity from the transistors to the frame of the sewing machine. A leaf spring may be included as part of the assembly urging the clamp member towards a released position when the cone pointed screw is retracted from the bracket to facilitate disassembly of the circuit board. | ||||||
| 183 | Reciprocating motion control device | US25844972 | 1972-05-31 | US3807241A | 1974-04-30 | MCKEEN L |
| A sewing machine having a rotary drive mechanism and a needle bar mounted for reciprocation between upper and lower positions with respect to a looper includes a transmission system operably connected between the rotary drive means and the needle bar to convert the rotary motion of the drive means to reciprocating motion of the needle bar. The transmission system includes a lever pivotally mounted in the machine and pivotally connected adjacent one end to the needle bar, a crank pivotally connected at one end to the rotary drive means, and a pitman pivotally connected between the crank and the lever to convert the rotary motion of the drive means and crank to reciprocating motion for oscillating the lever and reciprocating the needle bar. The crank is operatively connected to the looper for synchronously driving the looper with the needle bar. The transmission system also includes means for selectively maintaining the line of thrust of the pitman in a first position substantially perpendicular to the lever to transmit motion thereto from the drive means for reciprocating the needle bar and in a second position substantially in alignment with the lever whereby the pitman idles under the influence of the drive means without transmitting motion to the lever or the needle bar. A gating mechanism prevents changing the line of thrust of the pitman until the needle bar is in its raised position.
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| 184 | Reciprocating motion control device | US3688713D | 1971-03-29 | US3688713A | 1972-09-05 | MCKEEN LEIGHTON R |
| A sewing machine having a rotary drive mechanism and a needle bar mounted for reciprocation between upper and lower positions with respect to a looper includes a transmission system operably connected between the rotary drive means and the needle bar to convert the rotary motion of the drive means to reciprocating motion of the needle bar. The transmission system includes a lever pivotally mounted intermediate its ends and pivotally connected at one end to the needle bar, a crank pivotally connected at one end to the rotary drive means, and a pitman pivotally connected between the crank and the other end of the lever to convert the rotary motion of the drive means and crank to reciprocating motion for oscillating the lever and reciprocating the needle bar. The crank is operatively connected to the looper for synchronously driving the looper with the needle bar. The transmission system also includes means for selectively maintaining the line of thrust of the pitman in a first position substantially perpendicular to the lever to transmit motion thereto from the drive means for reciprocating the needle bar and in a second position substantially in alignment with the lever whereby the pitman idles under the influence of the drive means without transmitting motion to the lever or the needle bar.
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| 185 | Sewing machine drive mechanism | US48417565 | 1965-09-01 | US3347191A | 1967-10-17 | ROSS ROGER J |
| 186 | Time delayed switching device for sewing and the like machines | US66837657 | 1957-06-27 | US2906221A | 1959-09-29 | KARL WINZ |
| 187 | Driving devices for sewing and other machines | US54944355 | 1955-11-28 | US2874583A | 1959-02-24 | JOHN PLATT |
| 188 | Sewing machine | US60911545 | 1945-08-06 | US2532790A | 1950-12-05 | SCHMITT BERNARD A |
| 189 | Loop-taker and feed-actuating mechanism for sewing machines | US43851642 | 1942-04-11 | US2333438A | 1943-11-02 | FRANK PARRY |
| 190 | Sewing machine | US29687239 | 1939-09-28 | US2262137A | 1941-11-11 | FLECKENSTEIN GEORGE A |
| 191 | Transmission mechanism | US21171238 | 1938-06-04 | US2199678A | 1940-05-07 | GEORGE SAUER |
| 192 | Looper and puller actuating mechanism for sewing machines | US8220636 | 1936-05-28 | US2097243A | 1937-10-26 | GEORGE SAUER; SMITH CLARENCE C |
| 193 | Crank driven mechanism | US72694934 | 1934-05-22 | US1991945A | 1935-02-19 | NICHOLAUS KNAUS |
| 194 | Sewing machine | US60023732 | 1932-03-21 | US1922433A | 1933-08-15 | ALFRED GRIEB |
| 195 | Drive-chain tension adjuster | US7306325 | 1925-12-03 | US1767371A | 1930-06-24 | KELSO RALPH S |
| 196 | Sewing machine and actuating mechanism therefor | US29471028 | 1928-07-23 | US1765927A | 1930-06-24 | KARL MAIER |
| 197 | Overstitch mechanism | US26927919 | 1919-01-02 | US1419088A | 1922-06-06 | PETER WEIS JOHN |
| 198 | Work-holding-foot mechanism | US26927319 | 1919-01-02 | US1419087A | 1922-06-06 | PETER WEIS JOHN |
| 199 | Lubricating system and sewing-machine construction | US9435416 | 1916-04-29 | US1348527A | 1920-08-03 | PETER WEIS JOHN |
| 200 | Cutting attachment for cutting-machines | US26927519 | 1919-01-02 | US1342008A | 1920-06-01 | PETER WEIS JOHN |
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