US3693033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Key operated pulse generating device
Assignee: ELECTROMECHANISMS Inc
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Filing: 1971-06-24
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Granted: 1972-09-19
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Expires: 1991-06-24
Abstract
Abstract A key operated electric pulse generator comprising a housing of non-magnetic material supporting depressible key at one end, a coil at the other end, and a body of magnetic material spaced from the coil. A permanent magnet is supported in the housing for movement between the magnetic body and the coil and is normally magnetically attracted to the magnetic body. A spring is interposed between the permanent magnet and the depressible key so that upon depression of the key the spring will yield a certain amount and then cause the magnet to abruptly release from the magnetic body and be impelled toward the coil to generate an electric signal.
Inventors
- 👤 Donald L Troesh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:50
CPC Classifications
H; H02; H02K; H02K35/00; H02K35/02; H02K39/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
A pulse generating device comprising a housing, a coil in said housing adjacent one end of said housing, said coil having a hollow core, a manually depressible key having a hollow keystem slidably supported by said housing adjacent the opposite end of said housing for endwise movement; a plunger in said housing slidably supported at one end thereof in said core and at the opposite end thereof in said keystem for endwise movement, spring means for yieldably transferring endwise movement between said keystem and said plunger, a body of magnetic material fixed in said housing, and means forming a permanent magent fixed on said plunger, said magnet being normally magnetically attracted to said body and spaced from said coil, and said spring means being effective upon a predetermined depression of said key to cause said magnet to release from said body and to approach said coil whereby to generate an electrical pulse in said coil.
Claim 2
Dependent Claim
155 words
A pulse generating device comprising a housing, a coil in said housing adjacent one end of said housing, said coil having a hollow core, a manually depressible key having a hollow keystem slidably supported by said housing adjacent the opposite end of said housing for endwise movement; a plunger in said housing slidably supported at one end thereof in said core and at the opposite end thereof in said keystem for endwise movement, spring means for yieldably transferring endwise movement between said keystem and said plunger, a body of magnetic material fixed in said housing, and means forming a permanent magent fixed on said plunger, said magnet being normally magnetically attracted to said body and spaced from said coil, and said spring means being effective upon a predetermined depression of said key to cause said magnet to release from said body and to approach said coil whereby to generate an electrical pulse in said coil.
Claim 3
Dependent Claim
39 words
A pulse generating device according to claim 1 comprising a member of magnetic material having relatively low magnetic retentivity attached to one end of said magnet and engagable with said body when said magnet is attracted to said body.
Claim 4
Dependent Claim
111 words
A pulse generating device according to claim 1 wherein said body is cup-shaped and has a radially inwardly extending end, a pair of members of magnetic material having relatively low magnetic retentivity attached to opposite ends of said magnet, one of said members normally engaging the radially extending end of said body, said magnet extending within said body when said magnet is attracted to said body whereby to form a substantially enclosing magnetic fluxpath for said magnet, and said magnet receding at least partially from within said body during movement toward said coil whereby the lines of magnetic force developed by said magnet will move across the windings of said coil.
Claim 5
Dependent Claim
26 words
A pulse generating device according to claim 3 comprising a core within said coil, said core comprising a magnetic material having a relatively low magnetic retentivity.
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |