Patent US3684941A successfully refreshed from Google Patents.
US3684941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable battery powered eraser and support therefor
Assignee: AB Dick Co
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Filing: 1971-07-16
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Granted: 1972-08-15
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Expires: 1991-07-16
Abstract
Abstract A rechargeable cordless eraser comprising a carrier for supporting and electrically charging the eraser when not in use. The eraser includes socket means formed in the housing thereof adjacent one end and having a transverse retainer bar extending between opposite sidewalls of the socket. A pair of charging contact rings are spaced apart longitudinally on the retainer bar. The carrier is adapted to be attached to and supported from a drafting table or the like and includes hook means adapted to extend into the socket means on the eraser between opposite sides thereof and engage the carrier bar. The hook means includes an upwardly opening slot dimensioned for receiving said retainer bar and a pair of deflectable spring contacts are seated in the slot of the hook for supplying charging current to the contacts of the eraser and for biasing the retainer bar against the lower end of the slot to retain the eraser in hanging position on the hook when not in use.
Inventors
- 👤 John J Van Acker
- 👤 Robert E Zimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:16
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/42; H01M10/46; B; B43; B43L; B43L19/00; B43L19/0006; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S15/00; Y10S15/01
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
55 words
The combination of claim 1 wherein said carrier including a base adapted to be attached to a fixed object, such as a table, or the like, and longitudinal connector means interconnecting said base and said hook means permitting relative rotation between said hook means and said base around the longitudinal axis of said connector means.
Claim 2
Dependent Claim
27 words
The combination of claim 2 wherein said connector means comprises a spring permitting limited angular deflection between said base and hook means transversely of said longitudinal axis.
Claim 3
Dependent Claim
85 words
The combination of claim 2 wherein said connector means comprises a helical coil spring with a plurality of said coils wound around said longitudinal axis, at least one end of said coil spring mounted for rotation around said axis relative to said base. 5. The combination of claim 4 including line cord means for supplying current to said contacts in said hook means, said line cord means extending between said base and said hook means through the coils of said spring along said longitudinal axis.
Claim 4
Dependent Claim
37 words
The combination of claim 5 wherein said line cord means includes plug means at the free end for connection to an AC power source and rectifier means for converting AC to DC for supply to said contacts.
Claim 5
Dependent Claim
19 words
The combination of claim 4 including stop means for limiting rotation of said end coil relative to said base.
Claim 6
Dependent Claim
50 words
The combination of claim 1 wherein said socket means is defined adjacent a corner of said one end of said implement and includes at least one stop wall preventing said hook means from entering said socket means from a wrong direction thereby to insure proper polarity for recharging said implement.
Claim 7
Dependent Claim
31 words
The combination of claim 8 wherein said conTacts on said retainer bar are positioned adjacent opposite sidewalls of said socket means and are spaced apart by a midportion of said bar.
Claim 8
Dependent Claim
53 words
The combination of claim 1 wherein said slot in said hook means includes a pair of sloped opposite walls terminating in a rounded end, said contacts on said hook means including cam portions projecting outwardly of one wall toward said opposite wall and sloped to bias said carrier bar toward said rounded end.
Claim 9
Dependent Claim
110 words
A support carrier for holding and electrically charging a battery powered portable implement, said implement including a housing defining a socket means adjacent one end thereof, a transverse retainer bar extending between opposite sides of said socket, means including a pair of charging contacts spaced longitudinally on said bar, said carrier comprising a fixed base portion and an implement receiving portion, means interconnecting said base and receiving portions comprising resilient biasing means movably attaching said receiving portion to the base portion, said receiving portion further including an upwardly opening slot for receiving said retainer bar of said implement and means connecting said charging contacts to a source of electric current.
Claim 10
Dependent Claim
56 words
The support carrier as claimed in claim 11 wherein said upwardly opening slot is equipped with a pair of deflectable contacts in said slot for supplying current to said charging contacts on said implement and biasing said retainer bar against wall surfaces of said slot to support said implement in hanging position from said one end.
Claim 11
Dependent Claim
56 words
The support carrier as claimed in claim 11 wherein said resilient biasing means is a coiled spring extending along a longitudinal axis between said base and receiving portion having its free ends fixed respectively to said base portion and receiving portion permitting limiting angular deflection between said base and receiving portion relative to said longitudinal axis.
Claim 12
Dependent Claim
30 words
The support carrier of claim 13 including mounting means for securing one end of said biasing means to the receiving portion permitting rotation between the receiving portion and the base.
Claim 13
Dependent Claim
22 words
The support carrier of claim 14 including stop means for limiting rotation of said end coil relative to said base biasing means.
References Cited (Backward Citations)
US1757889A
Cited
US2622233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |