Patent US3594748A successfully refreshed from Google Patents.
US3594748A
Expired / Lapsed
US
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Alarm signalizer with miniature transmitter
Assignee: Individual
•
Filing: 1968-10-23
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Granted: 1971-07-20
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Expires: 1988-10-23
Abstract
Abstract A portable radio transmitter for personal protection wherein the energizing circuit contains a tilt-responsive switch and a pressure-sensitive switch, both switches normally held in an open circuit condition by the manner in which the transmitter is carried.
Inventors
- 👤 Alfred Grotjahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:26
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/02; G08B13/14; G08B13/1436; H; H01; H01H; H01H29/00; H01H29/002; H01H29/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
105 words
An alarm signalizer for the protection of persons and objects, comprising a casing adapted to be attached to the person and the object to be protected, a cover lid movably mounted upon said casing, a miniature transmitter located within said casing, a source of electric current located within said casing, an alarm-releasing circuit located with said casing and connected to said transmitter and said source, said circuit including a gravity-responding switch and a pressure-responding switch means, and means engaging said cover lid and said pressure-responding switch means and operating said pressure-responding switch means depending upon pressure or relief from pressure exerted upon said cover lid.
Claim 2
Dependent Claim
105 words
An alarm signalizer for the protection of persons and objects, comprising a casing adapted to be attached to the person and the object to be protected, a cover lid movably mounted upon said casing, a miniature transmitter located within said casing, a source of electric current located within said casing, an alarm-releasing circuit located with said casing and connected to said transmitter and said source, said circuit including a gravity-responding switch and a pressure-responding switch means, and means engaging said cover lid and said pressure-responding switch means and operating said pressure-responding switch means depending upon pressure or relief from pressure exerted upon said cover lid.
Claim 3
Dependent Claim
40 words
The alarm signalizer according to claim 1 wherein an annular mercury contact tube in a circumferential half is provided with a midpositioned contact directly connected to a dry cell battery and two external paralleled contacts connected with said miniature transmitter.
Claim 4
Dependent Claim
39 words
The alarm signalizer according to claim 2 wherein the circumferential half of said annular tube which is opposite to said first group of contacts is provided with a second group of two contacts in parallel connection with said contacts.
Claim 5
Dependent Claim
26 words
The alarm signalizer in accordance with claim 3 in which the contacts are adapted to form dampening elements for the mercury filling of said annular tube.
Claim 6
Dependent Claim
27 words
The alarm signalizer according to claim 4 wherein the contacts are formed as disclike electrodes of a diameter smaller than the internal diameter of said annular tube.
Claim 7
Dependent Claim
58 words
The alarm signalizer as claimed in claim 2 wherein the annular mercury contact tube consists of an annular glass tube the sectional diameter of which is dependent on the surface stress of the mercury filling, which in the resting position causes the cohesion of the mercury to exceed its adhesion to the inside wall of said glass tube.
Claim 8
Dependent Claim
22 words
The alarm signalizer according to claim 2 wherein the quantity of mercury filling corresponds to half the volume of the annular tube.
Claim 9
Dependent Claim
41 words
The alarm signalizer according to claim 1 in which a changeover switch is in parallel connection with the reverser, Which responds to pressure or relief of pressure exerted to the cover of the device and is lockable in its end positions.
Claim 10
Dependent Claim
34 words
An alarm signalizer according to claim 1 wherein a lid of the casing, in which the miniature transmitter is housed, is pivoted to an axle journal and forms an actuation member for the reverser.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |