Apparel – Guard or protector – For wearer's head
Patent
1988-07-27
1989-10-24
Nerbun, Peter
Apparel
Guard or protector
For wearer's head
219147, 200 83J, A61F 906
Patent
active
048752355
ABSTRACT:
A welder's mask with breath-activated eye shield which includes a conventional welder's mask housing with hardware for mounting upon a welder's head. A viewing opening exists in the mask housing which receives a welder's eye shield into an eye shield framework. A power source and motor are mounted to the mask housing. A linkage is attached between the shaft of the motor and the eye shield. The motor operates to turn the shaft in either rotational direction causing the linkage to move the eye shield out of the eye shield framework or into the eye shield framework according to the welder's choice. Operation of the motor is controlled by a breath-activated switch. An air chamber includes an aperture covered by a resilient diaphragm. A tube is connected to a second aperture in the air chamber. The welder exhales to outwardly flex the diaphragm from the chamber and inhales to inwardly flex the diaphragm. A rigid stem is connected between the diaphragm and an electrically conductive element. The electrically conductive element can thus be moved between two positions depending on whether the welder inhales or exhales. Two different signals can thus be sent to the motor to operate it in opposite directions according to choice.
REFERENCES:
patent: 3260816 (1966-07-01), Schad
patent: 3833936 (1974-09-01), Lo Guidice
patent: 3890646 (1975-06-01), Fassett et al.
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