Metal working – Method of mechanical manufacture – Electrical device making
Patent
1991-07-26
1992-07-21
Echols, P. W.
Metal working
Method of mechanical manufacture
Electrical device making
29874, 26427219, H01H 1106, H01H 6500
Patent
active
051311380
ABSTRACT:
This invention provides an optical micro-switch, and a method of mass-producing such optical micro-switches. The optical micro-switch comprises a first housing half containing electronic circuitry which generates light and a second housing half containing electronic circuitry which senses light, the electronic circuitry is separated by a plunger with an aperture and a slide with two apertures. The plunger and slide are positioned in the light transmission path between the light-emitting circuitry and the light-sensing circuitry. The optical micro-switch has an input prong, output prong, and a ground prong. The slide can be moved into either of two different positions which configures the switch as a normally open switch or a normally closed switch. In mass-producing these optical micro-switches, a continuous tape lead frame is provided. This continuous tape lead frame contains duplicate sets of frame portions for the first housing half and a second housing half of each optical micro-switch produced. The housing halves are molded around their respective frame portions, and the components of the optical micro-switch are assembled into the housing halves. The lead frame is folded to engage the housing halves and seal the components therein, completing the manufacture of the optical micro-switch.
REFERENCES:
patent: 2799237 (1957-07-01), Martines
patent: 4490903 (1985-01-01), Agatahama
patent: 4764645 (1988-08-01), Takasawa
patent: 4860436 (1989-08-01), Hirabayashi et al.
patent: 4914806 (1990-04-01), Taguchi et al.
Echols P. W.
Optoswitch, Inc.
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