Patent US3750130A successfully refreshed from Google Patents.
US3750130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical indicator
Assignee: Individual
•
Filing: 1971-11-17
•
Granted: 1973-07-31
•
Expires: 1991-11-17
Abstract
Abstract An electrical indicator for indicating increments of cable wound or unwound from a hoisting drum. A cam operated switch is associated with the hoisting drums so that the switch is closed once each revolution of the cam. The switch is wired into a circuit so as to ring a bell each time it is closed with the bell being wired into a circuit to cause the light to light and an electrical vibrator to vibrate each time the bell rings so that the operator of the equipment has a visual indication, an audible indication, and an indication for the sense of touch. A plurality of switches are provided which can be switched into the circuit so that a plurality of indications are given on each rotation of the cam.
Inventors
- 👤 L Lute
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:28
CPC Classifications
B; B66; B66C; B66C15/00; B66C15/06; B66C15/065
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
166 words
An electrical indicator for hand controlled equipment of the type including cable operated apparatus wherein the cable is wound and unwound from a drum comprising a rotary cam driven by the drum, a plurality of switch elements mounted for successive actuation by said cam on each rotation thereof, an electric bell for signalling the rotation of said winding drum, an electric circuit connecting said plurality of switch elements to said electric bell, a plurality of hand controlled switches for selectively connecting one or more of said plurality of switch elements to said electric bell through said electric circuit to energize said electric bell one or more times on each revolution of said rotary cam, a counter for counting each energization of said electric bell, means for selectively connecting said counter into said circuit, a signal lamp connected in said circuit, a signal vibrator connected in said circuit, and means actuated by said bell energizing said signal lamp and said vibrator each time said bell is energized.
Claim 2
Dependent Claim
166 words
An electrical indicator for hand controlled equipment of the type including cable operated apparatus wherein the cable is wound and unwound from a drum comprising a rotary cam driven by the drum, a plurality of switch elements mounted for successive actuation by said cam on each rotation thereof, an electric bell for signalling the rotation of said winding drum, an electric circuit connecting said plurality of switch elements to said electric bell, a plurality of hand controlled switches for selectively connecting one or more of said plurality of switch elements to said electric bell through said electric circuit to energize said electric bell one or more times on each revolution of said rotary cam, a counter for counting each energization of said electric bell, means for selectively connecting said counter into said circuit, a signal lamp connected in said circuit, a signal vibrator connected in said circuit, and means actuated by said bell energizing said signal lamp and said vibrator each time said bell is energized.
Claim 3
Dependent Claim
42 words
A device as claimed in claim 1 wherein said plurality of switch elements comprises four circumferentially equi-spaced elements with said plurality of hand controlled switches adapted to energize said electric bell one, two or four times on each revolution of said cam.
Claim 4
Dependent Claim
21 words
A device as claimed in claim 2 wherein said vibrator is mounted on the hand controls of said hand control equipment.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |