WATERTIGHT ALARM WRISTWATCH

• US 3,577,876 A
• Filed: 06/12/1969
• Issued: 05/11/1971
• Est. Priority Date: 06/17/1968
• Status: Expired due to Term

• Current Assignee: Spadini Paolo
• Original Assignee: Spadini Paolo
• Inventors: SPADINI PAOLO
• Application Number:
  US04/832,736
• Time in Patent Office: 698 Days
• US Class Current: 368/250
• CPC Class Codes: G04C 21/34 Devices on watches or similar portable timepieces
• CPC Class Codes: G04G 13/021 Details

Abstract

The sounds of the alarm are produced by a membrane exposed to the atmosphere and against which strikes a vibrating blade located in a recess provided in the outer surface of a piece which constitutes a section of an envelope tightly surrounding the watch movement, the latter being located in a recess provided in the inner surface of said piece.

Claims

1. A watertight alarm wristwatch comprising, in combination, a watch case having a bottom provided with an opening, a watch movement located in said watch case, an alarm device having all its parts located in said watch case and including an electrodynamic transducer, a resilient member and a membrane, said membrane extending across said opening of the watch case bottom and producing the audible sounds of the alarm device under the mechanical action of said resilient member when the latter is vibrating at a natural frequency, said electrodynamic transducer being arranged for causing said resilient member to vibrate at a natural frequency and for entertaining that vibration, and an envelope included by said watch case, for isolating a part of the alarm device from the watch movement, said envelope comprising a section provided with a recess having its opening exclusively directed toward the watch case bottom away from the space occupied by said movement, said recess forming at least a part of a housing arranged for the accommodation of at least said resilient member of said alarm device.

2. A watertight alarm wristwatch according to claim 1, in which said envelope section includes the watch case bottom, a first recess being provided in the inner surface of said section for said watch movement, and a second recess being provided in the outer surface of said section for said resilient member of the alarm device.

3. A watertight alarm wristwatch according to claim 1, in which a capsule includes all the parts of the alarm device with the exception of the source of energy and of control switches, said capsule being tightly closed by said membrane and located in a recess provided in the watch case bottom.

4. A watertight alarm wristwatch according to claim 1, in which said envelope section consists of an encasing member having a first recess provided in one of its side surfaces for said watch movement and a second recess provided in its opposed side surface for said resilient member of the alarm device, an annular watertight gasket located between said envelope section and a watch case part including the watchglass tightly closing said envelope.

5. A watertiGht alarm wristwatch according to claim 4, in which a further watertight gasket is located between said envelope section and a watch case part including the watch case bottom, thereby tightly closing the housing of said resilient member.

6. A watertight alarm wristwatch according to claim 4, in which a third recess is provided in said envelope section in the same side surface thereof as said second recess, said third recess serving as a housing for an electrical source of energy forming part of said alarm device.