Floating mask encoder with assembly spacer

Details Floating mask encoder with assembly spacer Floating mask encoder with assembly spacer

Filed on

1985-12-19

Date issued

1987-12-08

Examiner

Nelms, David C.

Patent Class

Radiant energy

SubClass

Photocells; circuits and apparatus

SubSubClass

Optical or pre-photocell system

Other Related Categories

250237G, G01D 534

Type

Patent

Status

active

Patent number

047120053

Description

ABSTRACT:
In an optical shaft encoder for converting rotary motion to an electrical signal, a shaft is rotatably mounted in a base and has a code disk attached thereto. A light source and photodetector are disposed on opposite sides of the code disk. The photodetector is covered by a mask which is attached thereto. The photodetector/mask assembly is loosely inserted into a printed circuit board and a spacer is placed between the code disk and the photodetector/mask assembly to achieve a predetermined air gap. The photodetector/mask assembly is then radially aligned with the code disk. After proper placement, the photodetector/mask assembly is soldered in place and the spacer is removed. This technique allows the optical shaft encoder to be manufactured to precise tolerances without the necessity of precision machining.

REFERENCES:
patent: 3524261 (1970-08-01), Klink
patent: 3545088 (1970-12-01), Johnson
patent: 3997782 (1976-12-01), Willits
patent: 4075478 (1978-02-01), Walker
patent: 4132890 (1979-01-01), Garcia et al.
patent: 4184071 (1980-01-01), Fryer et al.
patent: 4193199 (1980-03-01), Whiteley et al.
patent: 4319134 (1982-03-01), Weber
patent: 4338517 (1982-07-01), Perrine
patent: 4343992 (1982-08-01), Blaser
patent: 4345149 (1982-08-01), Blaser
patent: 4375592 (1983-03-01), Cox et al.
patent: 4476457 (1984-10-01), Kondo
patent: 4512184 (1985-04-01), Ernst et al.
patent: 4556792 (1985-12-01), Kano et al.
patent: 4614869 (1986-09-01), Hoshino et al.

Affiliated with

Also associated with

Rating

Floating mask encoder with assembly spacer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Floating mask encoder with assembly spacer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Floating mask encoder with assembly spacer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-23533