US3801943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electoacoustic transducers and electromagnetic assembly therefor
Assignee: Individual
•
Filing: 1972-06-05
•
Granted: 1974-04-02
•
Expires: 1992-06-05
Abstract
Abstract An electroacoustic transducer comprising a diaphragm and an electromagnetic assembly in driving relationship with the diaphragm, the assembly comprising a magnet, a core defining a gap in the magnet, a coil supported by a coil holder movably arranged in the gap with an end portion facing the diaphragm, a cap on said end portion having a top surface directed toward, and in driving relationship with, the diaphragm, the surface being preferably secured to the diaphragm by means of an adhesive. The adhesive may be soft or hard and the diaphragm is preferably flat. The cap seals the coil holder and a perforation is provided connecting the space formed between the cap, coil holder, core and gap with another surrounding whereby a rectilinear to and fro movement pump is defined by the cap, coil holder and core, the pumping action moving air to cool the coil. The lower end of the coil holder has a flange to prevent the coil from being shockremoved from the coil holder, and the upper end of the holder has a flange which is adhered to the cap.
Inventors
- 👤 J Bertagni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:27
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/06; H04R9/066; H04R9/02; H04R9/022
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
75 words
An electroacoustic transducer comprising a diaphragm and an electromagnetic assembly in driving relationship with said diaphragm, said electromagnetic assembly comprising a magnet, a core defining a gap in said magnet, a coil supported by a coil holder movably arranged in said gap with an end portion of said coil holder facing said diaphragm, an independent cap on said end portion defining a large contact top surface directed towards, and in driving relationship with, said diaphragm.
Claim 2
Dependent Claim
75 words
An electroacoustic transducer comprising a diaphragm and an electromagnetic assembly in driving relationship with said diaphragm, said electromagnetic assembly comprising a magnet, a core defining a gap in said magnet, a coil supported by a coil holder movably arranged in said gap with an end portion of said coil holder facing said diaphragm, an independent cap on said end portion defining a large contact top surface directed towards, and in driving relationship with, said diaphragm.
Claim 3
Dependent Claim
13 words
An electroacoustic transducer according to claim 1, wherein said surface overlies said holder.
Claim 4
Dependent Claim
15 words
An electroacoustic transducer according to claim 2, wherein said surface is secured to said diaphragm.
Claim 5
Dependent Claim
21 words
An electroacoustic transducer according to claim 3, wherein substantially the entire top surface of said cap is secured to said diaphragm.
Claim 6
Dependent Claim
16 words
An electroacoustic transducer according to claim 4, wherein said surface is adhesively secured to said diaphragm.
Claim 7
Dependent Claim
28 words
An electroacoustic transducer according to claim 4, wherein said surface is adhesively secured to said diaphragm by means of an adhesive interposed between said surface and said diaphragm.
Claim 8
Dependent Claim
25 words
An electroacoustic transducer according to claim 6, wherein said adhesive is a hard adhesive to provide a rigid connection between said surface and said diaphragm.
Claim 9
Dependent Claim
25 words
An electroacoustic transducer according to claim 6, wherein said adhesive is a soft adhesive to provide a resilient connection between said surface and said diaphragm.
Claim 10
Dependent Claim
14 words
An electroacoustic transducer according to claim 1, wherein said diaphragm is a flat diaphragm.
Claim 11
Dependent Claim
13 words
An electroacoustic transducer according to claim 9, wherein said surface overlies said holder.
Claim 12
Dependent Claim
15 words
An electroacoustic transducer according to claim 10, wherein said surface is secured to said diaphragm.
Claim 13
Dependent Claim
21 words
An electroacoustic transducer according to claim 11, wherein substantially the entire top surface of said cap is secured to said diaphragm.
Claim 14
Dependent Claim
16 words
An electroacoustic transducer according to claim 12, wherein said surface is adhesively secured to said diaphragm.
Claim 15
Dependent Claim
28 words
An electroaCoustic transducer according to claim 12, wherein said surface is adhesively secured to said diaphragm by means of an adhesive interposed between said surface and said diaphragm.
Claim 16
Dependent Claim
25 words
An electroacoustic transducer according to claim 14, wherein said adhesive is a hard adhesive to provide a rigid connection between said surface and said diaphragm.
Claim 17
Dependent Claim
25 words
An electroacoustic transducer according to claim 14, wherein said adhesive is a soft adhesive to provide a resilient connection between said surface and said diaphragm.
Claim 18
Dependent Claim
18 words
An electroacoustic transducer according to claim 15, wherein said diaphragm has a recess which substantially houses said adhesive.
Claim 19
Dependent Claim
18 words
An electroacoustic transducer according to claim 16, wherein said diaphragm has a recess which substantially houses said adhesive.
Claim 20
Dependent Claim
62 words
An electroacoustic transducer according to claim 1, wherein said cap has a flange receiving portion including surfaces generally transverse and parallel to the axis of said coil holder, said end portion of said coil holder having laterally projecting flange means received in said flange receiving portion and wherein an adhesive is interposed between the opposed surfaces of said holder and said cap.
Claim 21
Dependent Claim
29 words
An electroacoustic transducer according to claim 1, wherein said coil holder has flange means extending laterally below said coil to prevent the coil from sliding off said coil holder.
Claim 22
Dependent Claim
57 words
An electroacoustic transducer according to claim 1, wherein said cap seals said end portion of said coil holder, a space being formed between said cap, coil holder, core and gap, at least one perforation connecting said space to another surrounding, whereby a rectilinear to and fro moving pump is defined by said cap, coil holder and core.
Claim 23
Dependent Claim
35 words
An electroacoustic transducer according to claim 21, wherein the upper end of the coil holder is sealed to a frustoconical air impermeable resilient support having a lower flange which is sealed to the electromagnetic assembly.
Claim 24
Dependent Claim
26 words
An electroacoustic transducer according to claim 21, wherein said perforation is a through perforation passing through said core, one end of said perforation facing said cap.
Claim 25
Dependent Claim
17 words
An electroacoustic transducer according to claim 23, wherein said through perforation is sealed at its lower end.
Claim 26
Dependent Claim
24 words
An electroacoustic transducer according to claim 23, wherein said perforation is provided with a valve member for changing the cross sectional area passage thereof.
Claim 27
Dependent Claim
52 words
An electroacoustic transducer according to claim 1, wherein said cap has an upper face remote from said coil holder, said cap is provided on its upper face with a pair of channel members in which respective end portions of the conductor of the coil are housed and connected to respective other conductors.
Claim 28
Dependent Claim
16 words
An electroacoustic transducer according to claim 1, wherein said cap is constituted by a soft plastic.
Claim 29
Dependent Claim
16 words
An electroacoustic transducer according to claim 1, wherein said cap is constituted by a hard plastic.
Claim 30
Dependent Claim
63 words
An electroacoustic transducer according to claim 14, wherein said cap has an upper face remote from said coil holder, said cap is provided on its upper face with a pair of channel members in which respective end portions of the conductor of the coil are housed and connected to respective other conductors, said adhesive substantially covering said channels and conductors and connections therein.
Claim 31
Dependent Claim
32 words
An electroacoustic transducer according to claim 21, wherein said core forms part of a disc abutting on said magnet, said disc having a plurality of perforations connecting the outside with said gap.
Claim 32
Dependent Claim
171 words
An electromagnetic assembly for electroacoustic transducers and the like, comprising a magnet, a core defining a gap in said magnet, a coil holder having a coil wound thereon, said coil holder being movably arranged in said gap and an end portion of said coil holder projecting out of said magnet, said coil holder being provided with a seal cap in the portion projecting out of said gap, a space being formed between said cap, coil holder, cOre and gap, at least one perforation connecting said space with another surrounding, whereby a rectilinear to and fro moving pump is defined by said cap, coil holder and core, said coil holder having an upper end and a lower end, said coil being wound on the lower half of said coil holder by means of two juxtaposed layers of turns, the spacing between adjacent turns of one of said layers progressively increasing toward the upper end and the spacing between adjacent turns of the other of said layers progressively increasing toward the lower end.
Claim 33
Dependent Claim
171 words
An electromagnetic assembly for electroacoustic transducers and the like, comprising a magnet, a core defining a gap in said magnet, a coil holder having a coil wound thereon, said coil holder being movably arranged in said gap and an end portion of said coil holder projecting out of said magnet, said coil holder being provided with a seal cap in the portion projecting out of said gap, a space being formed between said cap, coil holder, cOre and gap, at least one perforation connecting said space with another surrounding, whereby a rectilinear to and fro moving pump is defined by said cap, coil holder and core, said coil holder having an upper end and a lower end, said coil being wound on the lower half of said coil holder by means of two juxtaposed layers of turns, the spacing between adjacent turns of one of said layers progressively increasing toward the upper end and the spacing between adjacent turns of the other of said layers progressively increasing toward the lower end.
Claim 34
Dependent Claim
136 words
An electromagnetic assembly for electroacoustic transducers and the like, comprising a magnet, a core defining a gap in said magnet, a coil holder having a coil wound thereon, said coil holder being movably arranged in said gap and an end portion of said coil holder projecting out of said magnet, said coil holder being provided with a seal cap in the portion projecting out of said gap, a space being formed between said cap, coil holder, core and gap, at least one perforation connecting said space with another surrounding, whereby a rectilinear to and fro moving pump is defined by said cap, coil holder and core, said coil holder being an endless cylinder the outer face of which is of electricity insulating material and the inner face of which is sheathed with an electricity conducting layer.
Claim 35
Dependent Claim
136 words
An electromagnetic assembly for electroacoustic transducers and the like, comprising a magnet, a core defining a gap in said magnet, a coil holder having a coil wound thereon, said coil holder being movably arranged in said gap and an end portion of said coil holder projecting out of said magnet, said coil holder being provided with a seal cap in the portion projecting out of said gap, a space being formed between said cap, coil holder, core and gap, at least one perforation connecting said space with another surrounding, whereby a rectilinear to and fro moving pump is defined by said cap, coil holder and core, said coil holder being an endless cylinder the outer face of which is of electricity insulating material and the inner face of which is sheathed with an electricity conducting layer.
Claim 36
Dependent Claim
150 words
An electromagnetic assembly for electroacoustic transducers and the like, comprising a magnet, a core defining a gap in said magnet, a coil holder having a coil wound thereon, said coil holder being movably arranged in said gap and an end portion of said coil holder projecting out of said magnet, said coil holder being provided with a seal cap in the portion projecting out of said gap, a space being formed between said cap, coil holder, core and gap, at least one perforation connecting said space with another surrounding, whereby a rectilinear to and fro moving pump is defined by said cap, coil holder and core, said cap having an upper face remote from said coil holder, said cap being provided on its upper face with a pair of channel members in which respective end portions of the conductor of the coil are housed and connected to respective other conductors.
Claim 37
Dependent Claim
150 words
An electromagnetic assembly for electroacoustic transducers and the like, comprising a magnet, a core defining a gap in said magnet, a coil holder having a coil wound thereon, said coil holder being movably arranged in said gap and an end portion of said coil holder projecting out of said magnet, said coil holder being provided with a seal cap in the portion projecting out of said gap, a space being formed between said cap, coil holder, core and gap, at least one perforation connecting said space with another surrounding, whereby a rectilinear to and fro moving pump is defined by said cap, coil holder and core, said cap having an upper face remote from said coil holder, said cap being provided on its upper face with a pair of channel members in which respective end portions of the conductor of the coil are housed and connected to respective other conductors.
Claim 38
Dependent Claim
14 words
An electromagnetic assembly according to claim 52, wherein said cap is of soft plastic.
Claim 39
Dependent Claim
129 words
An electromagnetic assembly for electroacoustic transducers and the like, comprising a magnet, a core defining a gap in said magnet, a coil holder having a coil wound thereon, said coil holder being movably arranged in said gap and an end portion of said coil holder projecting out of said magnet, said coil holder being provided with a seal cap in the portion projecting out of said gap, a space being formed between said cap, coil holder, core and gap, at least one perforation connecting said space with another surrounding, whereby a rectilinear to and fro moving pump is defined by said cap, coil holder and core, said core holder being made of plastified cardboard and said cap housing a good heat and electricity conducting metal disc facing said space.
Claim 40
Dependent Claim
129 words
An electromagnetic assembly for electroacoustic transducers and the like, comprising a magnet, a core defining a gap in said magnet, a coil holder having a coil wound thereon, said coil holder being movably arranged in said gap and an end portion of said coil holder projecting out of said magnet, said coil holder being provided with a seal cap in the portion projecting out of said gap, a space being formed between said cap, coil holder, core and gap, at least one perforation connecting said space with another surrounding, whereby a rectilinear to and fro moving pump is defined by said cap, coil holder and core, said core holder being made of plastified cardboard and said cap housing a good heat and electricity conducting metal disc facing said space.
Claim 41
Dependent Claim
21 words
An electromagnetic assembly according to claim 35, wherein a heat insulating layer is arranged between said metal disc and said cap.
Claim 42
Dependent Claim
15 words
An electromagnetic assembly according to claim 33, wherein said cap is made of hard material.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |