US4075626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alarm buzzer
Assignee: Kobishi Electric Co Ltd
•
Filing: 1977-02-04
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Granted: 1978-02-21
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Expires: 1997-02-04
Abstract
Abstract An alarm buzzer comprising an electromagnet, a yoke on which said electromagnet is mounted while maintaining insulation from the housing, an armature which is held with a plate spring on said yoke and is attracted by said electromagnet, a vibratory plate which contacts said armature, and a housing which incorporates the above components, wherein the bobbin of said electromagnet is made of an insulating material and consists of a hollow cylinder which receives an iron core in it and is wrapped with coil on its outer periphery, first flange provided on one end of said hollow cylinder, second flange provided on the other end of the hollow cylinder and at least one hollow projection provided on said second flange in the direction parting from said first flange, said yoke is provided with at least one hole into which said hollow projection of the bobbin is inserted, and the bobbin and the yoke are fixed to the housing of the alarm buzzer by a fixture which is inserted into the hollow projection of the bobbin inserted into said hole of the yoke.
Inventors
- 👤 Mitsuo Sakaguchi
- 👤 Hikoji Iwasaki
- 👤 Shigeo Shimoya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:17
CPC Classifications
G; G10; G10K; G10K9/00; G10K9/12; G10K9/13
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
181 words
An alarm buzzer comprising an electromagnet, a yoke on which said electromagnet is mounted while maintaining insulation from a housing, an armature which is held with a plate spring on said yoke and is attracted by said electromagnet, a vibratory plate which contacts said armature, and a housing which incorporates the above components wherein a bobbin of said electromagnet is made of an insulating material and consists of a hollow cylinder which receives an iron core in it and is wrapped with coil on its outer periphery, first flange provided on one end of said hollow cylinder, second flange provided on the other end of the hollow cylinder and at least one hollow projection provided on said second flange in a direction parting from said first flange, said yoke is provided with at least one hole into which said hollow projections of the bobbin is inserted, and the bobbin and the yoke are fixed to the housing of the alarm buzzer by a fixture which is inserted into the hollow projection of the bobbin inserted into said hole of the yoke.
Claim 2
Dependent Claim
181 words
An alarm buzzer comprising an electromagnet, a yoke on which said electromagnet is mounted while maintaining insulation from a housing, an armature which is held with a plate spring on said yoke and is attracted by said electromagnet, a vibratory plate which contacts said armature, and a housing which incorporates the above components wherein a bobbin of said electromagnet is made of an insulating material and consists of a hollow cylinder which receives an iron core in it and is wrapped with coil on its outer periphery, first flange provided on one end of said hollow cylinder, second flange provided on the other end of the hollow cylinder and at least one hollow projection provided on said second flange in a direction parting from said first flange, said yoke is provided with at least one hole into which said hollow projections of the bobbin is inserted, and the bobbin and the yoke are fixed to the housing of the alarm buzzer by a fixture which is inserted into the hollow projection of the bobbin inserted into said hole of the yoke.
Claim 3
Dependent Claim
14 words
An alarm buzzer as claimed in claim 1, wherein said fixture is a rivet.
Claim 4
Dependent Claim
49 words
An alarm buzzer as claimed in claim 1, wherein more than two hollow projections are provided and said fixture is inserted into at least one hollow projection and a terminal into the other hollow projection, one end of said terminal being projected outside the housing from the hollow projection.
Claim 5
Dependent Claim
55 words
An alarm buzzer as claimed in claim 1, wherein a part of the yoke is cut and raised in the same direction as said hollow projection, the tip end of the raised part being inserted into a hole provided in the bottom of the housing as is kept insulated and being projected outside the housing.
Claim 6
Dependent Claim
55 words
An alarm buzzer as claimed in claim 3, wherein a part of the yoke is cut and raised in the same direction as said hollow projection, the tip end of the raised part being inserted into a hole provided in the bottom of the housing as is kept insulated and being projected outside the housing.
Claim 7
Dependent Claim
71 words
An alarm buzzer as claimed in claim 5, wherein said bobbin is made of a thermoplastic resin, an uneven part is provided at a part of said terminal located inside said hollow projection of the bobbin and said hollow projection which is melted by a heat generated when soldering the coil to the terminal engages with said uneven part of the terminal, thereby the terminal is fixed to the hollow projection.
Claim 8
Dependent Claim
27 words
An alarm buzzer as claimed in claim 5, wherein a lug terminal is fixed with said fixture on the outer surface of the bottom of said housing.
Claim 9
Dependent Claim
41 words
An alarm buzzer as claimed in claim 7, wherein the projections are provided on the outer surface of the bottom of the housing and on the terminals for temporarily securing the alarm buzzer before soldering it to the printed circuit board.
Claim 10
Dependent Claim
38 words
An alarm buzzer as claimed in claim 7, wherein a projection is provided on each terminal in order to insert and fix the terminal of the alarm buzzer into the holding fixture fixed on the printed circuit board.
References Cited (Backward Citations)
US3974499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |