US3840870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic cup alarm device
Assignee: Individual
•
Filing: 1971-09-02
•
Granted: 1974-10-08
•
Expires: 1991-09-02
Abstract
Abstract An alarm system includes a suction cup or pressure ball which is compressed, for example by closing a part of a door hinge against it or by application to it or an article to be held by it such as a watch. The interior of suction cup or pressure ball communicates with a resilient member which is stretched by the increased pressure of the air therewithin to open a switch in a alarm circuit. Opening of the door or removal of the watch or article will result in closing of this switch so as to sound an alarm.
Inventors
- 👤 A Norrod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:27
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
In combination, an alarm device comprising a frame member, a hollow member of resilient material having a concavity therein and having a substantially planar opening thereinto into said concavity, the hollow member being carried by said frame member and said alarm device having resilient wall means forming a space connected to said concavity, a closure member movably connected on said frame member to close said planar opening and to press against said hollow member, whereby upon pressure exerted by the closure member on the hollow member and closure of said planar opening air pressure is built up on one side of said wall means, and switch means operatively positioned with respect to said wall means to be engaged thereby upon movement of said wall means under the influence of pressure exerted within the hollow member.
Claim 2
Dependent Claim
135 words
In combination, an alarm device comprising a frame member, a hollow member of resilient material having a concavity therein and having a substantially planar opening thereinto into said concavity, the hollow member being carried by said frame member and said alarm device having resilient wall means forming a space connected to said concavity, a closure member movably connected on said frame member to close said planar opening and to press against said hollow member, whereby upon pressure exerted by the closure member on the hollow member and closure of said planar opening air pressure is built up on one side of said wall means, and switch means operatively positioned with respect to said wall means to be engaged thereby upon movement of said wall means under the influence of pressure exerted within the hollow member.
Claim 3
Dependent Claim
23 words
In a combination as claimed in claim 1, having an alarm circuit connected to said switch means, said alarm circuit being normally closed.
Claim 4
Dependent Claim
56 words
In a combination as claimed in claim 1, in which the hollow member is a suction cup, said alarm device having a circular frame supporting said suction cup adjacent the periphery of the circular frame for engagement of the circular frame by a watch band carrying a watch engageable over the face of the suction cup.
Claim 5
Dependent Claim
33 words
In a combination as claimed in claim 3, said closure member constituting a part of a hinge, said hinge including one part support said hollow member and another part carrying said closure member.
Claim 6
Dependent Claim
21 words
In a combination as claimed in claim 4, said wall means including an elongated resilient tube connected to said hollow member.
Claim 7
Dependent Claim
32 words
In a combination as claimed in claim 5, a first tubular member having a second tubular slidable in said first tubular member, said resilient tube being located within said second tubular member.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |