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Mechanical Motion Adder

IP.com Disclosure Number: IPCOM000084767D
Original Publication Date: 1976-Jan-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Daniels, RA: AUTHOR [+2]

Abstract

The mechanical motion adder shown adds motion 1 to motion 2, and divides their sum by 2 to form motion 7. Motions 1, 2 and 7 should be parallel otherwise the parallel components of motions 2 and 7 are summed.

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Mechanical Motion Adder

The mechanical motion adder shown adds motion 1 to motion 2, and divides their sum by 2 to form motion 7. Motions 1, 2 and 7 should be parallel otherwise the parallel components of motions 2 and 7 are summed.

The motion adder consists of pulley 3 rotatably mounted on shaft 4. Shaft 4 is mounted on carriage 6 which is spring loaded by spring 8. Thus, pulley 3 can rotate about shaft 4 and at the same time translate in the direction of motion 7 on carriage 6. Cable 10 wraps pulley 3 and provides the input motions 1 and 2. Since pulley 3 can translate as well as rotate, motions 1 and 2 need not be equal and opposite. Of course, if they were equal and opposite, there would be no motion 7 because pulley 3 would then simply rotate.

Looking now to carriage 6, motion 7 is taken from carriage 6 by cable 12. However, any mechanical link to carriage 6 could be made to use translational motion 7 of carriage 6. Spring 8 is provided to spring load carriage 6 against cable 10 whereby tension is maintained in cable 10.

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