Patent US3890646A successfully refreshed from Google Patents.
US3890646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding hood
Assignee: Individual
•
Filing: 1973-10-19
•
Granted: 1975-06-24
•
Expires: 1993-10-19
Abstract
Abstract A welder''s helmet having a motor secured thereto to move the smoked glass from a position covering the opening in the helmet eliminating harmful rays from reaching the wearer''s eyes to a position where it does not cover the opening and is out of the wearer''s line of vision enabling inspection of the work. The movement of the smoked glass is controlled by a battery-operated motor which is controlled for both operation and direction of operation by means of a diaphragm switch responsive to the wearer''s breath. The motor drives a threaded rod upon which a split nut is secured. The split nut is held in threaded engagement with the rod by means of a spring-biased clip which provides sufficient inward pressure to cause the nut to move upon the rod when rotated by the motor under normal conditions. In the event the glass is impeded from movement or has reached the end of its track, the rod will spin within the split nut, overcoming the bias of the spring clip and causing no damage to the elements.
Inventors
- 👤 Donald G Fassett
- 👤 Ralph F Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:51
CPC Classifications
F; F16; F16P; F16P1/00; F16P1/06; A; A61; A61F; A61F9/00; A61F9/04; A61F9/06; A61F9/061; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19735
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
204 words
In a welding helmet including a face shield having an opening, and a window reciprocatively mounted on the face shield to be moved to and from a viewing position in registry with the opening, the improvement comprising: actuator means responsive to the breath of the wearer for moving the window to and from its viewing position; means connecting said actuator means with the window; said connecting means including a threaded shaft having a longitudinal axis, said shaft being rotatively movable by saId actuator means about its longitudinal axis, nut means secured to the window and yieldingly threadedly engaged with the shaft to be moved along the shaft in response to rotation of said shaft about its longitudinal axis, so as to thereby correspondingly move the window to and from its viewing position; said nut means comprising a plurality of mutually opposed nut sections threadedly engaging said shaft, and means for biasing said nut sections relatively toward each other so as to yieldingly grip said shaft therebetween, said biasing means being adapted to allow said nut sections to be forced out of engagement with said shaft in response to continued rotation of said shaft about its longitudinal axis when movement of the window is stopped.
Claim 2
Dependent Claim
204 words
In a welding helmet including a face shield having an opening, and a window reciprocatively mounted on the face shield to be moved to and from a viewing position in registry with the opening, the improvement comprising: actuator means responsive to the breath of the wearer for moving the window to and from its viewing position; means connecting said actuator means with the window; said connecting means including a threaded shaft having a longitudinal axis, said shaft being rotatively movable by saId actuator means about its longitudinal axis, nut means secured to the window and yieldingly threadedly engaged with the shaft to be moved along the shaft in response to rotation of said shaft about its longitudinal axis, so as to thereby correspondingly move the window to and from its viewing position; said nut means comprising a plurality of mutually opposed nut sections threadedly engaging said shaft, and means for biasing said nut sections relatively toward each other so as to yieldingly grip said shaft therebetween, said biasing means being adapted to allow said nut sections to be forced out of engagement with said shaft in response to continued rotation of said shaft about its longitudinal axis when movement of the window is stopped.
Claim 3
Dependent Claim
33 words
The welding helmet of claim 1 including two mutually opposed nut sections, and wherein said biasing means comprises a spring clamp including two mutually opposed jaws respectively engaged with said two nut sections.
Claim 4
Dependent Claim
19 words
The welding helmet of claim 2 wherein said spring clamp further comprises an intermediate portion secured to the window.
Claim 5
Dependent Claim
70 words
The welding helmet of claim 1 wherein said window is movable between its viewing position and a stowed position in which it is out of registry with the opening, said biasing means being adapted to allow said nut sections to be forced out of engagement with said shaft in response to continued rotation of said shaft about its longitudinal axis when the window is at its stowed and viewing positions.
Claim 6
Dependent Claim
23 words
The welding helmet of claim 1 wherein said actuator means comprises a reversible motor, and pressure actuated switch means for actuating said motor.
Claim 7
Dependent Claim
108 words
In combination, a threaded shaft having a longitudinal axis about which said shaft is rotatable, nut means threadedly engaged with said shaft to be moved along said shaft in response to rotation of said shaft about its longitudinal axis, said nut means including a plurality of mutually opposed nut sections threadedly engaging said shaft, and means for biasing said nut sections relatively toward each other so as to yieldingly grip said shaft therebetween, said biasing means being adapted to allow said nut sections to be forced out of engagement with said shaft in response to continued rotation of said shaft when movement of said nut means is stopped.
Claim 8
Dependent Claim
108 words
In combination, a threaded shaft having a longitudinal axis about which said shaft is rotatable, nut means threadedly engaged with said shaft to be moved along said shaft in response to rotation of said shaft about its longitudinal axis, said nut means including a plurality of mutually opposed nut sections threadedly engaging said shaft, and means for biasing said nut sections relatively toward each other so as to yieldingly grip said shaft therebetween, said biasing means being adapted to allow said nut sections to be forced out of engagement with said shaft in response to continued rotation of said shaft when movement of said nut means is stopped.
Claim 9
Dependent Claim
32 words
The combination of claim 6 including two mutually opposed nut sections, and wherein said biasing means comprises a spring clamp including two mutually opposed jaws respectively engaged with said two nut sections.
References Cited (Backward Citations)
US1346996A
Cited
US1346997A
Cited
US2272001A
Cited
US2417883A
Cited
US3122731A
Cited
US3579638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |