US3745865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclic variable speed drive
Assignee: Harris Corp
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Filing: 1971-08-09
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Granted: 1973-07-17
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Expires: 1991-08-09
Abstract
Abstract A variable speed drive employing two crank and slider mechanisms so that the speed change created by each of the slider crank mechanisms is multiplied by the speed change created by the other slider crank mechanism. The drive permits variable output speeds from a constant input speed.
Inventors
- 👤 R Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:41
CPC Classifications
F; F16; F16H; F16H35/00; F16H35/02; B; B23; B23D; B23D36/00; B23D36/0008; B23D36/0033; B23D36/0041; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/1836; Y10T74/18408; Y10T83/00; Y10T83/465; Y10T83/474; Y10T83/4743; Y10T83/4766; Y10T83/4775
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
242 words
A cyclic variable speed drive comprising a first axis of rotation, a drive input member supported for rotation about said first axis of rotation, first means defining another axis of rotation, an arm, said arm being mounted on said first means for rotation about said other axis, said arm including a first portion having an elongated radial slot and a second portion directed in substantially the opposite direction from said slot, driven output means, said driven output means axis being coaxial with said first axis of rotation, a rotor, said rotor being connected to said driven output means to drive it about said first axis of rotation, said rotor including an elongated radially directed slot, first and second elongated coupling members disposed in substantially parallel relation to said first axis of rotation, said first coupling member having one end fixed to said drive input member and having a roller on its other end rotatably received in said firsT arm slot for rotating said arm, said second elongated coupling member having one end fixed to said arm second portion and having its other end rotatably received in said rotor slot for rotating said rotor, and means for moving the arm in a direction perpendicular to said axes for changing the distance between said first and second axes in opposite directions from a zero position to cyclically vary the speed of said driven output means relative to the speed of saId drive input member.
Claim 2
Dependent Claim
242 words
A cyclic variable speed drive comprising a first axis of rotation, a drive input member supported for rotation about said first axis of rotation, first means defining another axis of rotation, an arm, said arm being mounted on said first means for rotation about said other axis, said arm including a first portion having an elongated radial slot and a second portion directed in substantially the opposite direction from said slot, driven output means, said driven output means axis being coaxial with said first axis of rotation, a rotor, said rotor being connected to said driven output means to drive it about said first axis of rotation, said rotor including an elongated radially directed slot, first and second elongated coupling members disposed in substantially parallel relation to said first axis of rotation, said first coupling member having one end fixed to said drive input member and having a roller on its other end rotatably received in said firsT arm slot for rotating said arm, said second elongated coupling member having one end fixed to said arm second portion and having its other end rotatably received in said rotor slot for rotating said rotor, and means for moving the arm in a direction perpendicular to said axes for changing the distance between said first and second axes in opposite directions from a zero position to cyclically vary the speed of said driven output means relative to the speed of saId drive input member.
Claim 3
Dependent Claim
43 words
A variable speed drive in accordance with claim 1 wherein said rotor and arm are tapered so as to have less mass at one free end thereof, and said second coupling member having a crown roller disposed in the slot on said rotor.
Claim 4
Dependent Claim
42 words
A variable speed drive in accordance with claim 1 wherein the second coupling member terminates in a roller disposed in the rotor slot, the roller on said first coupling member having a larger diameter than the roller on said second coupling member.
Claim 5
Dependent Claim
36 words
A variable speed drive in accordance with claim 1 including first and second cutting blades mounted on shafts, gear means coupling said shafts, the shaft for said first blade being connected to said driven output means.
Claim 6
Dependent Claim
33 words
A variable speed drive in accordance with claim 1 wherein said arm second portion has a pocket so that the shear center of the arm is outside a vertical plane containing the arm.
Claim 7
Dependent Claim
206 words
A cyclic variable speed drive comprising an output shaft rotatable about its longitudinal axis to drive a tool, a rotor fixed to said output shaft so that rotation of said rotor causes said output shaft to rotate, means for cyclically driving said rotor, said means including a support shaft rotatable about an axis parallel to said output shaft, an elongated arm fixedly connected intermediate its ends on said support shaft for rotation about the axis of said shaft, one end portion of said arm being coupled to said rotor by a coupling member constrained for radial movement on said arm, the other end portion of said arm being tapered toward the free end thereof and having a radially disposed slot therein, a roller means constrained for movement in said slot, said driving means being operative to cause said roller to rotate said arm about said support shaft, motor means for moving the axis of rotation of said support shaft from a zero position where it is coaxial with the longitudinal axis of said output shaft to maximum and minimum offset positions on opposite sides of the zero position, and the distance between the maximum offset position and the minimum offset position being less than 8 inches.
Claim 8
Dependent Claim
206 words
A cyclic variable speed drive comprising an output shaft rotatable about its longitudinal axis to drive a tool, a rotor fixed to said output shaft so that rotation of said rotor causes said output shaft to rotate, means for cyclically driving said rotor, said means including a support shaft rotatable about an axis parallel to said output shaft, an elongated arm fixedly connected intermediate its ends on said support shaft for rotation about the axis of said shaft, one end portion of said arm being coupled to said rotor by a coupling member constrained for radial movement on said arm, the other end portion of said arm being tapered toward the free end thereof and having a radially disposed slot therein, a roller means constrained for movement in said slot, said driving means being operative to cause said roller to rotate said arm about said support shaft, motor means for moving the axis of rotation of said support shaft from a zero position where it is coaxial with the longitudinal axis of said output shaft to maximum and minimum offset positions on opposite sides of the zero position, and the distance between the maximum offset position and the minimum offset position being less than 8 inches.
Claim 9
Dependent Claim
55 words
A variable speed device as defined in claim 6 wherein said arm has a pocket on said one end portion between said coupling member and said shaft, said pocket being on a side face of said arm remote from said rotor and having a depth greater than one-half the thickness of said one end portion.
Claim 10
Dependent Claim
33 words
A variable speed device in accordance with claim 6 wherein a crowned roller is supported by said coupling member, said rotor having a slot receiving said crowned roller and being rotatably driven thereby.
Claim 11
Dependent Claim
73 words
A variable speed drive in accordance with claim 6 wherein the offset between the axes of said shafts is defined by: e R(1 - Square Root K/SL) wherein e is the offset in inches, R is the distance in inches between the longitudinal axes of the support shaft and the crowned roller, SL designates sheet length which corresponds to the tool period and K is the circumference of the tool path in inches.
Claim 12
Dependent Claim
30 words
A variable speed device in accordance with claim 9 wherein said tool is a cutting blade and the tool period corresponds to the sheet lengths cut from a moving web.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |