Browse Prior Art Database

Incremental Drive Mechanism

IP.com Disclosure Number: IPCOM000090607D
Original Publication Date: 1969-May-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Heath, JS: AUTHOR [+3]

Abstract

Carriage 1 is slidably mounted for linear motion between guide rails 2 and 3. The direction of movement of carriage 1 is determined by the direction of rotation of lead screw 4. Axially mounted on lead screw 4 is flexible circular disk 5 close to, but not contacting, two spaced-apart friction drive wheels 6 and 7. These are continuously rotated by axle 8 positioned at right angles to lead screw 4. Two solenoid operated pressure pads 9 and 10 are selectively movable to deform disk 5 to contact one or other of wheels 6 or 7 to effect movement of carriage 1 in the required direction. Arrows in the drawing show the relative movements of axle 8, lead screw 4, and carriage 1 when disk 5 is driven by friction wheel 6.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 85% of the total text.

Page 1 of 2

Incremental Drive Mechanism

Carriage 1 is slidably mounted for linear motion between guide rails 2 and 3. The direction of movement of carriage 1 is determined by the direction of rotation of lead screw 4. Axially mounted on lead screw 4 is flexible circular disk 5 close to, but not contacting, two spaced-apart friction drive wheels 6 and 7. These are continuously rotated by axle 8 positioned at right angles to lead screw 4. Two solenoid operated pressure pads 9 and 10 are selectively movable to deform disk 5 to contact one or other of wheels 6 or 7 to effect movement of carriage 1 in the required direction. Arrows in the drawing show the relative movements of axle 8, lead screw 4, and carriage 1 when disk 5 is driven by friction wheel 6.

When carriage 1 moves the required distance, the pressure pad is retracted breaking the contact between disk and driving wheel. At the same time, detent mechanism 11 is activated to prevent further rotation of lead screw 4. A suitable detent mechanism is described in IBM Technical Disclosure Bulletin, Volume 10, page 474.

A second flexible disk 12, drive wheels 13 and 14, and pressure pads 15 and 16 are provided to speed up the linear translation of the carriage. Disk 12 is mounted on stub axle 17 and is coupled through stepup gear train 18, 19, and 20 to lead screw 4. When rapid translation of carriage 1 is required, lead screw 4 is first rotated at low speed by disk 5 and then at high speed by disk 12 acting through gear train...