Browse Prior Art Database

Air Cylinder Stroke Sensor

IP.com Disclosure Number: IPCOM000060687D
Original Publication Date: 1986-Apr-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Bechtler, HJ: AUTHOR [+2]

Abstract

Small air cylinders are usually manufactured without any means of indicating when the piston has reached the end of its stroke. This invention provides for a mechanism to actuate indicating lights which would signal the foregoing condition.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 73% of the total text.

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Air Cylinder Stroke Sensor

Small air cylinders are usually manufactured without any means of indicating when the piston has reached the end of its stroke. This invention provides for a mechanism to actuate indicating lights which would signal the foregoing condition.

A typical cylinder 1 is shown in the figure with the piston 11 at the extreme right position. The on/off switch 4 has left/right positions 5. When the switch is at the left position, the air supply flows from port 3 through port 2 of the switch to the input port 2 at the left side of the cylinder driving the piston to the right. When the switch is in the right position, the air moves from port 3 to port 4 of the switch to the input port 3 of the cylinder and drives the piston to the left.

The invention modifies the cylinder so as to equip it with a threaded boss 6 at its left underside and a similar boss at its right underside 7. These are connected to a multi-port detent valve 8 at positions 5 and 1 respectively. The pneumatic flow lines from the on/off switch are also connected to the detent valve at positions A and B. A red 9 and a green 10 indicating light are connected to ports 2 and 4 of the detent valve.

With the invention, when the on/off switch is moved to the left and the air supply moves the piston to the right, also enters the detent valve at port A. This opens the internal passage from 1 to 2 and closes 5 to 4 so that when the piston has traversed the exit port at 7 air will flow directl...