Patent US4011594A successfully refreshed from Google Patents.
US4011594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding mask window door automatic operation
Assignee: Individual
•
Filing: 1975-09-29
•
Granted: 1977-03-15
•
Expires: 1995-09-29
Abstract
Abstract An improved welding mask having a tinted window door that automatically closes as soon as a welding rod strikes an object that is intended to be welded, and wherein the door automatically opens and all electric current is shut the moment the welding arc is broken; the mask including an electrical circuit for accomplishing the same, the circuit including a transformer, relay and rectifier for activating a pair of door operating relays at opposite sides of the door, and the circuit extending through the welding torch and the work.
Inventors
- 👤 Antoine L. Guilbaud
- 👤 George Spector
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:26
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/04; A61F9/06; A61F9/061
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
143 words
A welding mask having a door pivotally mounted on a door frame surrounding an opening said door being pivotally movable between an opened and a closed position, said door having a transparent, tinted window whereby a user can look through said door at strong light when said door is in closed position, in combination with electrically operated means mounted on said frame for pivoting said door from the open to the closed position, said means comprising solenoid relay means supported on said frame, a lever, said solenoid relay having a plunger pivotally engaging one end of said lever mounted rotatably on said frame side including an opposite end of said lever carrying a roller that bears against the front of said door to urge said door pivotally closed, when said relays are electrically actuated, including a spring biasing said door the open position.
Claim 2
Dependent Claim
143 words
A welding mask having a door pivotally mounted on a door frame surrounding an opening said door being pivotally movable between an opened and a closed position, said door having a transparent, tinted window whereby a user can look through said door at strong light when said door is in closed position, in combination with electrically operated means mounted on said frame for pivoting said door from the open to the closed position, said means comprising solenoid relay means supported on said frame, a lever, said solenoid relay having a plunger pivotally engaging one end of said lever mounted rotatably on said frame side including an opposite end of said lever carrying a roller that bears against the front of said door to urge said door pivotally closed, when said relays are electrically actuated, including a spring biasing said door the open position.
Claim 3
Dependent Claim
62 words
The combination as set forth in claim 1 wherein an upper end of said door is secured to a horizontal shaft pivotally about stationary bearings, said spring being a coil wound around said shaft and normally urging said door towards the open position in combination with an electric circuit including a welding torch which actuates said relays upon contact with the work.
Claim 4
Dependent Claim
84 words
The combination as set forth in claim 2 including a second transparent window mounted in the frame in said opening spaced inwardly from the first said window and including a central portion rotatable about a central axis normal to said windows, said portion having a straight guide line, said frame including a movable clamp mounted on the frame adjacent the door adapted to retain the door in closed position against the action of the spring, particularly when the solenoid relays are not electrically actuated.
References Cited (Backward Citations)
US1643509A
Cited
DE455647C
Cited
US2154774A
Cited
US2487183A
Cited
US2678369A
Cited
CH292940A
Cited
US2660728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |