US3776584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for replacing tubular lamps and the like which are difficult of access
Assignee: GERVEN G VAN
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Filing: 1972-03-07
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Granted: 1973-12-04
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Expires: 1992-03-07
Abstract
Abstract The disclosure relates to a clamping spanner which is to be placed on the end of a control stick and comprises jaw halves which are forced towards each other by springs and which in the opened condition can pass a tubular lamp and in the closed condition can grip around the tube to above the longitudinal central axis, by a driving shaft directed transverse to the plane of said spanner and extending at least approximately through the pivot thereof, which shaft is connected, by means of a square transmission, to a coupling shaft extending at right angles thereto, said coupling shaft being rotatable from the lower end of the control stick when the spanner is placed on said stick, the driving shaft comprising means which are capable of engaging, with friction, a tubular lamp inserted in the spanner, and by two guide roller shafts which extend parallel to the driving shaft and which are each supported so as to be rotatable in the free end of one of the jaw halves of the spanner and which are provided with guide rollers capable of engaging the upper part of a tubular lamp inserted in the spanner.
Inventors
- 👤 Gerven G Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:15
CPC Classifications
H; H01; H01K; H01K3/00; H01K3/32
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
273 words
A clamping spanner apparatus of the kind which is placed on the end of a control stick for replacing difficult to access tubular lamps and the like, said spanner apparatus comprising, two jaw halves movable between an open end condition in which the jaw halves can pass a tubular lamp and a closed condition in which the jaw halves grip around the tubular lamp above the longitudinal central access of the tubular lamp, common pivot means connecting the jaw halves for movement between the open end and closed conditions and having a pivot axis extending parallel to the longitudinal central axis of the tubular lamp to be gripped, spring means biasing the jaw halves toward the closed condition, a driving shaft having an axis coincident with the pivot axis so that the jaw halves rotate about the axis of the driving shaft, a coupling shaft extending at right angles to the driving shaft and coupled to the driving shaft by a square transmission and having a lower end engagable with and rotatable by the control stick, at least one drive roller on the driving shaft, two guide roller shafts each mounted for rotation in the upper end of an associated jaw half and extending parallel to the driving shaft, each guide roller shaft having a guide roller, a plurality of elastically extendable endless drive strips extending around the driving shaft and the guide rollers for frictionally engaging the sides of the tubular lamp, the spring means having such a strength that the spanner is closed with elastic expansion of the strips until the guide rollers engage the upper part of the tubular lamp.
Claim 2
Dependent Claim
273 words
A clamping spanner apparatus of the kind which is placed on the end of a control stick for replacing difficult to access tubular lamps and the like, said spanner apparatus comprising, two jaw halves movable between an open end condition in which the jaw halves can pass a tubular lamp and a closed condition in which the jaw halves grip around the tubular lamp above the longitudinal central access of the tubular lamp, common pivot means connecting the jaw halves for movement between the open end and closed conditions and having a pivot axis extending parallel to the longitudinal central axis of the tubular lamp to be gripped, spring means biasing the jaw halves toward the closed condition, a driving shaft having an axis coincident with the pivot axis so that the jaw halves rotate about the axis of the driving shaft, a coupling shaft extending at right angles to the driving shaft and coupled to the driving shaft by a square transmission and having a lower end engagable with and rotatable by the control stick, at least one drive roller on the driving shaft, two guide roller shafts each mounted for rotation in the upper end of an associated jaw half and extending parallel to the driving shaft, each guide roller shaft having a guide roller, a plurality of elastically extendable endless drive strips extending around the driving shaft and the guide rollers for frictionally engaging the sides of the tubular lamp, the spring means having such a strength that the spanner is closed with elastic expansion of the strips until the guide rollers engage the upper part of the tubular lamp.
Claim 3
Dependent Claim
24 words
An apparatus as claimed in claim 1, characterized in that the driving and guide rollers comprise circumferential grooves in which the driving strips fit.
Claim 4
Dependent Claim
30 words
An apparatus as claimed in claim 2, characterized in that each driving strip can contact with the surface of the tubular lamp over an arc of at least 90 degrees.
Claim 5
Dependent Claim
61 words
An apparatus as claimed in claim 3, including a control stick and characterized in that the control stick is hollow and comprises a driving shaft which cen be rotated by means of a driving grip at its lower end and which coMprises at its upper end a coupling member which can be made to engage the coupling shaft of the spanner.
Claim 6
Dependent Claim
147 words
An apparatus as claimed in claim 4, said control stick having a first tube and a second tube axially slidable within the first tube to vary the length of the control stick, first clamping means for clamping the second tube at a fixed position on the second tube, each tube having an inner drive member, a first splined connection between the inner drive members for accommodating axial sliding of the first and second tubes, said clamping spanner driving shaft comprising an outer tubular member axially slidable on one of the first and second tubes, second clamping means for clamping the outer tubular member on one of the first and second tubes, said driving shaft also comprising an inner drive member, and a second splined connection between the inner drive member of said driving shaft and the inner drive member of one of the first and second tubes.
Claim 7
Dependent Claim
28 words
An apparatus as claimed in claim 5 wherein the upper end of the control stick includes a pivot having a universal joint and means for securing the pivot.
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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |