Patent US3818238A successfully refreshed from Google Patents.
US3818238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety apparatus
Assignee: Individual
•
Filing: 1972-09-05
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Granted: 1974-06-18
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Expires: 1992-09-05
Abstract
Abstract Safety apparatus intended to safeguard the operation of a machine and to discourage overloading of an electric motor powering the machine. The machine is one which requires the operator to wear an eye or face protector and incorporated in the protector is switch means connected by an electric circuit to the machine motor. Only when the protector is in normal position of use will the machine operate or the work be properly illuminated by a floodlight also forming part of the circuit. A heat sensitive switch in the circuit aids in preventing the operator from overloading the machine motor.
Inventors
- 👤 G Lemire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:05
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/003; Y; Y10; Y10S; Y10S200/00; Y10S200/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
94 words
Safety apparatus for machine powered by an electric motor comprising an electric circuit connecting the electric motor to a source of electric power, a protector adapted to be worn over the face of an operator of the machine, safety switch means mounted on the protector and connected by the electric circuit to the electric motor, said safety switch means having a pressure actuated contact which is closed to connect the electric motor to the power source normally only when the protector is in proper position of use upon the head of the machine operator.
Claim 2
Dependent Claim
94 words
Safety apparatus for machine powered by an electric motor comprising an electric circuit connecting the electric motor to a source of electric power, a protector adapted to be worn over the face of an operator of the machine, safety switch means mounted on the protector and connected by the electric circuit to the electric motor, said safety switch means having a pressure actuated contact which is closed to connect the electric motor to the power source normally only when the protector is in proper position of use upon the head of the machine operator.
Claim 3
Dependent Claim
138 words
Safety apparatus for a machine powered by an electric motor comprising an electric circuit connecting the electric motor to a source of electric power, a protector adapted to be worn over the face of an operator of the machine, safety switch means associated with the protector and included in the electric circuit, said safety switch means having a pressure actuated contact adapted to close and connect the electric motor to the power source when the protector is in proper position of use upon the head of the machine operator, and means for illuminating the work being performed on the machine by the operator, said illuminating means being included in the electric circuit, and light-sensitive switch means in the electric circuit adapted to disconnect the electric motor from the power source when the illuminating means is not operating properly.
Claim 4
Dependent Claim
138 words
Safety apparatus for a machine powered by an electric motor comprising an electric circuit connecting the electric motor to a source of electric power, a protector adapted to be worn over the face of an operator of the machine, safety switch means associated with the protector and included in the electric circuit, said safety switch means having a pressure actuated contact adapted to close and connect the electric motor to the power source when the protector is in proper position of use upon the head of the machine operator, and means for illuminating the work being performed on the machine by the operator, said illuminating means being included in the electric circuit, and light-sensitive switch means in the electric circuit adapted to disconnect the electric motor from the power source when the illuminating means is not operating properly.
Claim 5
Dependent Claim
42 words
Safety apparatus as claimed in claim 2, and including mounting means for the goggles and the illuminating means, said mounting means comprising a bracket having a vertical leg attachable to a wall near the machine and a horizontal leg overhanging said machine.
Claim 6
Dependent Claim
26 words
Safety apparatus as claimed in claim 3, in which said horizontal leg is longitudinally extensible and swingable about a vertical pivot located near the vertical leg.
Claim 7
Dependent Claim
35 words
Safety apparatus as claimed in claim 2 and including heat-sensitive switch means in the electric circuit adapted to disconnect the electric motor from the power source when said electric motor is subjected to an overload.
Claim 8
Dependent Claim
30 words
Safety apparatus as claimed in claim 2, and including a first signalling device in the electric circuit adapted to warn the machine operator of a defect in the illuminating means.
Claim 9
Dependent Claim
25 words
Safety apparatus as claimed in claim 6, and including a second signalling device in the electric circuit adapted to signal the existance of an overload.
Claim 10
Dependent Claim
42 words
Safety apparatus as claimed in claim 2, in which said safety switch means comprises two additional pressure actuated contacts spaced from the first mentioned pressure actuated contact as well as from one another with all of said contacts being connected in series.
Claim 11
Dependent Claim
201 words
Safety apparatus for a machine powered by an electric motor comprising an electric circuit connecting the electric motor to a source of electric power, a protector adapted to be worn over the face of an operator of the machine, safety switch means associated with the protector and included in the electric circuit, said safety switch means having a pressure actuated contact adapted to close and connect the electric motor to the power source when the protector is in proper position of use upon the head of the machine operator, means for illuminating the work being performed on the machine by the operator, said illuminating means being included in the electric circuit, and light-sensitive switch means in the electric circuit adapted to disconnect the electric motor from the power source when the illuminating means is not operating properly, heat-sensitive switch means in the electric circuit adapted to disconnect the electric motor from the power source when said electric motor is subjected to an overload, a first signalling device in the electric circuit adapted to warn the machine operator of a defect in the illuminating means, and a second signalling device in the electric circuit adapted to signal the existance of an overload.
Claim 12
Dependent Claim
201 words
Safety apparatus for a machine powered by an electric motor comprising an electric circuit connecting the electric motor to a source of electric power, a protector adapted to be worn over the face of an operator of the machine, safety switch means associated with the protector and included in the electric circuit, said safety switch means having a pressure actuated contact adapted to close and connect the electric motor to the power source when the protector is in proper position of use upon the head of the machine operator, means for illuminating the work being performed on the machine by the operator, said illuminating means being included in the electric circuit, and light-sensitive switch means in the electric circuit adapted to disconnect the electric motor from the power source when the illuminating means is not operating properly, heat-sensitive switch means in the electric circuit adapted to disconnect the electric motor from the power source when said electric motor is subjected to an overload, a first signalling device in the electric circuit adapted to warn the machine operator of a defect in the illuminating means, and a second signalling device in the electric circuit adapted to signal the existance of an overload.
Claim 13
Dependent Claim
42 words
Safety apparatus as claimed in claim 9, and including mounting means for the goggles and the illuminating means, said mounting means comprising a bracket having a vertical leg attachable to a wall near the machine and a horizontal leg overhanging said machine.
References Cited (Backward Citations)
US2800543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |