US3628865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positioning mechanism
Assignee: Individual
•
Filing: 1969-06-16
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Granted: 1971-12-21
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Expires: 1989-06-16
Abstract
Abstract A positioning mechanism primarily for aligning a photographic film held in a movable frame, particularly applicable to microphotography where a high degree of accuracy is required, comprising a notched camway wherein the notches provide fine alignment for a coarser aligning means, these notches may be in a camway formed helically around a roller, a cam follower is provided linked to the frame and cooperating with the notches, the cam follower can be driven by the camway so that by turning the roller one way the frame is moved forward and turning the frame the other way the frame can be positioned, methods of reversing the travel of the frame at a preselected stage can be provided.
Inventors
- 👤 Harry Arthur Hele Spence-Bate
- 👤 John Michael Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:16
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/58; G03B27/583
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
84 words
A positioning mechanism comprising a positioning member movable in two direction, means defining a camway in said positioning member, means defining a series of spaced notches along said camway, a cam follower driveable in two directions in a substantially linear path along said camway and engageable in said notches, and an element driveable by said cam follower, said element being adapted for substantially linear movement, whereby said element is located in a predetermined position when said cam follower engages in one of said notches.
Claim 2
Dependent Claim
84 words
A positioning mechanism comprising a positioning member movable in two direction, means defining a camway in said positioning member, means defining a series of spaced notches along said camway, a cam follower driveable in two directions in a substantially linear path along said camway and engageable in said notches, and an element driveable by said cam follower, said element being adapted for substantially linear movement, whereby said element is located in a predetermined position when said cam follower engages in one of said notches.
Claim 3
Dependent Claim
44 words
A positioning mechanism as defined in claim 1 for positioning a frame, wherein said positioning member is a cylindrically shaped roller, said camway is a helical groove formed around said roller and said cam is adapted to be in constant engagement with said camway.
Claim 4
Dependent Claim
32 words
A positioning mechanism as defined in claim 2, wherein the roller is provided with resilient means between the roller and a roller drive for tensioning the cam follower in a said notch.
Claim 5
Dependent Claim
46 words
A positioning mechanism as defined in claim 3 further comprising a second camway running parallel to said first camway and connected to said first camway whereby an endless camway is provided so that the cam follower can be returned to the beginning of said first camway.
Claim 6
Dependent Claim
92 words
A positioning mechanism as defined in claim 4 further comprising a deflector adjacent at least one said notch, the deflector comprising a triangular raised portion positioned so as to allow the cam follower to move on one side of the deflector into the notch and on the other side of the deflector on that wall of the groove forming the camway that is unnotched, whereby the cam follower can be moved in a direction reverse to that direction which is the direction in which the cam follower is driven along the camway.
Claim 7
Dependent Claim
82 words
A positioning mechanism as defined in claim 5 having a control mechanism for the motor driving the roller shaft comprising a two part camming mechanism consisting of at least two camming discs resiliently interconnected and one of which being drivably connected to the roller shaft, at least one of said camming discs being provided with steps for operating a switch, a second set of camming discs being provided to maintain the switch in an operating position when the roller drive is reversed.
Claim 8
Dependent Claim
93 words
A positioning mechanism as defined in claim 2 having a means for adjustinG the position in which the cam follower is located in a notch comprising one side of the notch being bounded by an insert, said insert being slidable towards or away from the camway having the said notch, the insert being provided with a locking means, whereby by sliding the insert towards or away from the camway the location position of the cam follower is adjusted, and whereby on completion of adjustment the insert can be locked in the required position.
Claim 9
Dependent Claim
94 words
A positioning mechanism as defined in claim 1, including a bar, the longest side of said bar being substantially parallel to the directions of travel of said driveable element, wherein said series of spaced notches are formed along said bar, each of said notches having an apex substantially opposite its open side, said bar being movable in directions substantially perpendicular to the directions of movement of of said driveable element, and said notches are adapted to engage said cam follower whereby the cam follower is directed to position in the apices of said notches.
Claim 10
Dependent Claim
53 words
A positioning mechanism as defined in claim 8, further characterized in that said bar is comprised of a series of adjacently disposed plates, each of said plates have one of said notches, and each of said plates are independently movable in directions substantially perpendicular to the directions of movement of said driveable element.
References Cited (Backward Citations)
US1221515A
Cited
US1847312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |