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Universal Drive Assembly Disclosure Number: IPCOM000078861D
Original Publication Date: 1973-Mar-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 48K

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This drive assembly can operate in an incremental or continuous mode in a forward or reverse direction.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
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Universal Drive Assembly

This drive assembly can operate in an incremental or continuous mode in a forward or reverse direction.

The drive assembly includes a continuously rotating shaft 10, Fig. 1, driven by a motor, not shown. The drive assembly is mounted on carriage 52, Fig. 4, and moves longitudinally along drive shaft 10. Frame 15, Fig. 5, supported by studs 16 and 17 is adapted to be pivoted from the neutral position shown in Fig. 1 to the forward position shown in Fig. 2, or to the reverse position shown in Fig.
3. Frame 15 carries roller 20, Fig. 5, which is maintained in contact with shaft 10 by a spring loaded bushing 21, Figs. 4 and 5, cradled in yolk 22. An extension 15a of frame 15 is essentially an armature of forward magnet coil 30. It also carries a spring loaded pivotal latch 15b which is adapted to engage fixed rack
40. Latch 15b is constantly urged by spring 15c in a counterclockwise direction. Spring 15c attaches to latch 15b and to stud 15d projecting from support 15e journaled on shaft 10. Latch 15b is held out of engagement with rack 40 whenever reverse magnet 50 is energized to attract its armature 51. It should be noted that frame 15, support 15e, and magnets 30 and 50 are all mounted in carriage 52, which moves longitudinally to shaft 10 and fixed rack 40.

In order to move one step in the forward direction, magnet 30 is energized momentarily to attract its armature 15a. This causes frame 15 to pivot counterclockwise, whereby roller 20 is set at an angle with respect to shaft 10 as in Fig. 2. Also, latch 15b advances one tooth relative to rack 40. Then, as shaft 10 continues to rotate, the carriage is...