US4036084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing and replacing spiral springs in clock barrels
Assignee: Individual
•
Filing: 1976-08-25
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Granted: 1977-07-19
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Expires: 1996-08-25
Abstract
Abstract A support frame carries a rotary clock spring winding shaft having a reversible locking means. A set of variably sized spring retaining sleeves are provided and are selectively placed on the winding shaft according to the size of the clock spring barrel. A parallel stationary shaft on the support frame mounts a group of adjustable spring end holding elements which cooperate with the winding shaft during the winding up or unwinding of the clock spring. The apparatus effects removal and replacement of the clock spring in its barrel or retainer in a very simple manner without injuring the spring or the hands of the manipulator.
Inventors
- 👤 Marvin D. Schirmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:19
CPC Classifications
G; G04; G04D; G04D1/00; G04D1/04; G04D1/041; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53613; Y10T29/53626
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
126 words
Apparatus for removing clock springs from their mountings and for replacing the springs after servicing, said apparatus comprising a support body, a spring winding and unwinding rotary shaft journaled on the support, reversible locking means for said rotary shaft to lock the same against retrograde movement selectively in opposite directions, said rotary shaft having coupling means adapted for connection releasably with a clock spring arbor, at least one transfer sleeve having an end slot adapted for placement over the rotary shaft, a second shaft parallel to the rotary shaft on said support body and spaced laterally from the rotary shaft, and at least one clock spring end engaging and securing hook on said second shaft and shiftable axially and circumferentially thereon to selected positions of use.
Claim 2
Dependent Claim
126 words
Apparatus for removing clock springs from their mountings and for replacing the springs after servicing, said apparatus comprising a support body, a spring winding and unwinding rotary shaft journaled on the support, reversible locking means for said rotary shaft to lock the same against retrograde movement selectively in opposite directions, said rotary shaft having coupling means adapted for connection releasably with a clock spring arbor, at least one transfer sleeve having an end slot adapted for placement over the rotary shaft, a second shaft parallel to the rotary shaft on said support body and spaced laterally from the rotary shaft, and at least one clock spring end engaging and securing hook on said second shaft and shiftable axially and circumferentially thereon to selected positions of use.
Claim 3
Dependent Claim
63 words
The apparatus of claim 1, and said reversible locking means comprising a ratchet gear on said rotary shaft, a double-toothed locking pawl rockably mounted on the support body and shiftable toward and from two locking positions of engagement with the ratchet gear, and a shiftable element on the support body operatively engaging said double-toothed locking pawl to move the latter in opposite directions.
Claim 4
Dependent Claim
25 words
The apparatus of claim 2, and said shiftable element comprising a member pivoted to said support body and having an end slidably engaging said pawl.
Claim 5
Dependent Claim
17 words
The apparatus of claim 3, and said end formed by a spring-urged contact element on said member.
Claim 6
Dependent Claim
17 words
The apparatus of claim 1, and a hand crank on said rotary shaft for turning the same.
Claim 7
Dependent Claim
34 words
The apparatus of claim 1, and said coupling means comprising an end socket opening in the rotary shaft, and radial set screw means on the rotary shaft adjacent to and intersecting said socket opening.
Claim 8
Dependent Claim
19 words
The apparatus of claim 6, and said set screw means comprising plural circumferentially spaced groups of radial set screws.
Claim 9
Dependent Claim
25 words
The apparatus of claim 1, and a plurality of said transfer sleeves of varying diameter to coact with clock spring barrels of correspondingly differing diameters.
Claim 10
Dependent Claim
29 words
The apparatus of claim 1, and said second shaft being removable axially from said support body, and readily removable means for securing the second shaft on the support body.
Claim 11
Dependent Claim
42 words
The apparatus of claim 9, and plural clock spring end engaging and securing hooks of different lengths on said second shaft and being reversible thereon when one end of the second shaft is retracted from its engaged position with the support body.
Claim 12
Dependent Claim
39 words
The apparatus of claim 10, and one of said hooks having a spring-engaging terminal parallel to the axes of said rotary shaft and second shaft, the terminals of the other hooks being transverse to the axes of said shafts.
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) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |