US3838465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording and/or playback apparatus with battery indication controlled by cover position
Assignee: US Philips Corp
•
Filing: 1973-05-16
•
Granted: 1974-09-24
•
Expires: 1993-05-16
Abstract
Abstract A recording and/or playback apparatus for battery operation having an indicator for battery voltage testing, which can be switched on and off by means of a switching element comprising a sensor which is actuated by means of a movable cover for a cassette compartment, the indicator being switched on, or being switched to stand by and subsequencly switched on by operating one of the controls of the apparatus, when the cover is in the opened position.
Inventors
- 👤 K Fischer
- 👤 A Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:52
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/675; G11B15/67581; G11B15/67584; G11B25/00; G11B25/06; G11B25/063; Y; Y10; Y10S; Y10S320/00; Y10S320/18; Y10S320/21
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
115 words
A recording and/or playback apparatus for battery operation, comprising a battery voltage indicator which is switched on by a movable switching element and a compartment which can hold a cassette containing a record carrier, and can be closed By means of a cover, the cover being movable from a first position in which the compartment is uncovered to a second position in which the compartment is closed, characterized in that the switching element has a sensor which in the first position of the cover protrudes into the space occupied by the cover in its second position, the sensor being reset and the indicator being switched off when the cover is moved to the second position.
Claim 2
Dependent Claim
115 words
A recording and/or playback apparatus for battery operation, comprising a battery voltage indicator which is switched on by a movable switching element and a compartment which can hold a cassette containing a record carrier, and can be closed By means of a cover, the cover being movable from a first position in which the compartment is uncovered to a second position in which the compartment is closed, characterized in that the switching element has a sensor which in the first position of the cover protrudes into the space occupied by the cover in its second position, the sensor being reset and the indicator being switched off when the cover is moved to the second position.
Claim 3
Dependent Claim
43 words
An apparatus as claimed in claim 1, characterized in that, in order to switch on the indicator, a control provided for switching on a different function of the apparatus is to be operated in addition to the switching operation performed by the sensor.
References Cited (Backward Citations)
US3562441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |