Patent US4151520A successfully refreshed from Google Patents.
US4151520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable self-contained alarm with remote triggering capability
Assignee: Individual
•
Filing: 1977-07-25
•
Granted: 1979-04-24
•
Expires: 1997-07-25
Abstract
Abstract An alarm device is provided comprising a portable housing having an audio alarm positioned therein and a battery powered electronic circuit for activating the alarm. The circuit comprises a battery, an arming switch, a triggering switch, an audio alarm, and a latching circuit and oscillator circuit utilizing an integrated circuit therein. The circuit also includes a means for connecting auxiliary devices thereto and a means for coupling an AC adapter. A magnetically operated reed switch and a mechanically operated pull switch comprise the normally open triggering switch. The triggering switch also contains means for adapting any activator wired normally open to the triggering switch. The oscillator circuit drives the audio alarm whenever any of the triggering switches are closed and the latching circuit maintains the oscillator in an operating mode.
Inventors
- 👤 Elliott D. Full
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:28
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/02; G08B13/14; G08B13/1445; G08B13/1454; G08B13/08; G08B13/149; G08B21/00; G08B21/02; G08B21/04; G08B21/0438; G08B21/0469
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
259 words
A portable alarm device comprising, a portable housing, a battery means within said housing, an audio alarm within said housing, and an electronic circuit means within said housing connecting said battery means to said alarm, said electronic circuit means comprising an oscillator circuit means to drive said alarm, a latching circuit means to hold said oscillator circuit means in an operating mode after activation, said oscillator circuit means being electrically connected to said latching circuit means and said alarm, a first triggering switch means to activate said oscillator circuit means and said alarm, and a second switch means electrically connected to positions with said first triggering switch means being electrically connected to said latching circuit means and said second switch means, said first position of said second switch means being a closed position to place said electronic circuit means in a ready, armed mode so that activation of said triggering switch means activates said oscillator circuit means and said alarm, said latching circuit means being disabled for a predetermined time period after said second switch means assumes said first position so that activation of said triggering switch means during said predetermined time period momentarily activates said oscillator circuit means and said alarm in an unlatched condition and the activation of said triggering switch means subsequent to said predetermined time period activates said latching circuit means, said oscillator circuit means and said alarm in a latched condition, said second position of said second switch means being an open position to place said electronic circuit means in an off, unarmed mode.
Claim 2
Dependent Claim
259 words
A portable alarm device comprising, a portable housing, a battery means within said housing, an audio alarm within said housing, and an electronic circuit means within said housing connecting said battery means to said alarm, said electronic circuit means comprising an oscillator circuit means to drive said alarm, a latching circuit means to hold said oscillator circuit means in an operating mode after activation, said oscillator circuit means being electrically connected to said latching circuit means and said alarm, a first triggering switch means to activate said oscillator circuit means and said alarm, and a second switch means electrically connected to positions with said first triggering switch means being electrically connected to said latching circuit means and said second switch means, said first position of said second switch means being a closed position to place said electronic circuit means in a ready, armed mode so that activation of said triggering switch means activates said oscillator circuit means and said alarm, said latching circuit means being disabled for a predetermined time period after said second switch means assumes said first position so that activation of said triggering switch means during said predetermined time period momentarily activates said oscillator circuit means and said alarm in an unlatched condition and the activation of said triggering switch means subsequent to said predetermined time period activates said latching circuit means, said oscillator circuit means and said alarm in a latched condition, said second position of said second switch means being an open position to place said electronic circuit means in an off, unarmed mode.
Claim 3
Dependent Claim
27 words
The device of claim 1 wherein said latching circuit means and said oscillator circuit means comprise an integrated circuit component electrically connected in series with a transistor.
Claim 4
Dependent Claim
69 words
The device of claim 2 wherein said first triggering switch means comprises a normally open, magnetically operated, reed switch electrically connected in parallel to a normally open, mechanically operated, pull switch and a jack means connected in parallel to said reed switch and said pull switch for electrical connection of a remote, normally open, switch in an auxiliary device for actuation of said audio alarm by said auxiliary device.
Claim 5
Dependent Claim
35 words
The device of claim 3 wherein a second jack means is connected to said second switch means such that an AC adapter may be connected to said electronic circuit means for use of alternating current.
Claim 6
Dependent Claim
23 words
The device of claim 4 wherein a lanyard is connected at one end to said pull switch and extends outwardly from said housing.
Claim 7
Dependent Claim
48 words
The device of claim 1 wherein said latching circuit means and said oscillator circuit means maintain a zero potential voltage across said audio alarm when said first triggering switch means is in an open position and said second two position switch means is in the first, closed position.
Claim 8
Dependent Claim
50 words
The device of claim 6 wherein said latching circuit means and said oscillator circuit means maintain a pulsating driving voltage across said audio alarm to activate said alarm when said first triggering switch means is in a closed position and said second switch means is in a first closed position.
Claim 9
Dependent Claim
26 words
The device of claim 1 wherein said audio alarm sounds in a pulsating manner when activated by said oscillator circuit means and said latching circuit means.
Claim 10
Dependent Claim
17 words
The device of claim 1 wherein said first triggering switch means is a normally open switch means.
Claim 11
Dependent Claim
23 words
The device of claim 1 wherein said second position of said second switch means disconnects said battery means from said electronic circuit means.
Claim 12
Dependent Claim
22 words
The device of claim 1 wherein activation of said first triggering switch means instantaneously activates said oscillator circuit means and said alarm.
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) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |