Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1993-01-13
1994-07-12
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250214B, G01V 904
Patent
active
053291174
ABSTRACT:
A dosing dispenser for flowable material, including a container having a erial introducing aperture and an outlet through which material can pass by gravity, an electrically operated valve having a nozzle coupled to the outlet, for controlling the passage of material therethrough, an electromagnetic radiation emitter located in close proximity to the nozzle, for emitting a controlled radiation beam in the vicinity of the nozzle and an electromagnetic radiation detector located adjacent to the emitter and responsive to radiation emitted from the emitter and reflected by a body placed along the emitted radiation path. The emitter and detector are affixed in a radiation directing and shielding housing, for determining the directivity of the emitted and reflected radiation. There is also provided an electronic control circuit for controlling the valve in response to detected radiation reflected by the body placed along the emitted radiation path.
REFERENCES:
patent: 4645094 (1987-02-01), Acklin et al.
patent: 4669218 (1987-06-01), Kornbrekke et al.
patent: 4722372 (1988-02-01), Hoffman et al.
patent: 4742337 (1988-05-01), Haag
Galili Yuval
Hexter Yiftach
Baccarat Mitkanei Pikud Pneumatiyim le Automatzia Kvutzat Geva
Nelms David C.
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