Patent US3785212A successfully refreshed from Google Patents.
US3785212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion altering apparatus
Assignee: WINDAMATIC SYST Inc
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Filing: 1973-02-23
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Granted: 1974-01-15
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Expires: 1993-02-23
Abstract
Abstract Disclosed is an apparatus for changing rotary driving motion of uniform velocity into driven rotary motion whose velocity varies in a uniformly recurring pattern. The length of and number of minimum velocity or ''''dwell'''' periods is adjustable over a wide range. The apparatus can be utilized in actuating the movement of a winding head for winding wire on electric stators, or the like. An offset driving crank drives a Scotch yoke slide, the slide carrying a freely rotatable member. The rotatable member has a pin and slot connection to the driving or input shaft and this input shaft also drives the offset driving crank. The freely rotatable member has a pin and slot connection to the output or driven shaft.
Inventors
- 👤 R Eminger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:26
CPC Classifications
H; H02; H02K; H02K15/00; H02K15/08; H02K15/085; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/1804
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
309 words
An apparatus for converting rotary driving motion of uniform velocity into rotary driven motion whose velocity varies in a uniformly recurring pattern as the driving motion proceeds, said apparatus comprising a drive shaft adapted to rotate at a constant velocity and a drive disc rigidly secured to the drive shaft and rotating concentrically therewith, a radial slot in the face of said disc, a slide member mounted for reciprocating rectilinear motion adjacent said slotted disc face and normal to the axis of rotation of the disc, an elongated slot formed in said slide member extending transverse to the direction of motion of the slide, a crank member extending into said slot, a crank drive shaft mounted for rotation adjacent said drive shaft, said crank member being attached to but offset from the axis of rotation of said crank drive shaft and with said slot forming a Scotch yoke drive between said crank drive shaft and said slide, motion transmission means between said drive shaft and said crank drive shaft to rotate the latter with the former but in opposite direction, a circular element supported for free rotation of said slide member, said circular element having an abutment offset from the center of the element and extending from one face of the circular element into said radial slot in the drive shaft disc, the opposite face of said circular element having a radial slot, an output shaft mounted for rotation adjacent said slide member, a crank abutment carried by said output shaft offset from the axis of rotation thereof and extending into said radial slot in the circular element whereby upon uniform rotation of said drive shaft the simple harmonic motion of said slide member is superimposed on the cranking motion imparted to said output shaft to produce a recurring pattern of varying velocity of rotation in the output shaft.
Claim 2
Independent Claim
309 words
An apparatus for converting rotary driving motion of uniform velocity into rotary driven motion whose velocity varies in a uniformly recurring pattern as the driving motion proceeds, said apparatus comprising a drive shaft adapted to rotate at a constant velocity and a drive disc rigidly secured to the drive shaft and rotating concentrically therewith, a radial slot in the face of said disc, a slide member mounted for reciprocating rectilinear motion adjacent said slotted disc face and normal to the axis of rotation of the disc, an elongated slot formed in said slide member extending transverse to the direction of motion of the slide, a crank member extending into said slot, a crank drive shaft mounted for rotation adjacent said drive shaft, said crank member being attached to but offset from the axis of rotation of said crank drive shaft and with said slot forming a Scotch yoke drive between said crank drive shaft and said slide, motion transmission means between said drive shaft and said crank drive shaft to rotate the latter with the former but in opposite direction, a circular element supported for free rotation of said slide member, said circular element having an abutment offset from the center of the element and extending from one face of the circular element into said radial slot in the drive shaft disc, the opposite face of said circular element having a radial slot, an output shaft mounted for rotation adjacent said slide member, a crank abutment carried by said output shaft offset from the axis of rotation thereof and extending into said radial slot in the circular element whereby upon uniform rotation of said drive shaft the simple harmonic motion of said slide member is superimposed on the cranking motion imparted to said output shaft to produce a recurring pattern of varying velocity of rotation in the output shaft.
Claim 3
Dependent Claim
36 words
An apparatus as claimed in claim 1 in which the offset of said crank member from said axis of rotation of the crank drive shaft is adjustable to vary the throw of the Scotch yoke drive.
Claim 4
Dependent Claim
29 words
An apparatus as claimed in claim 1 in which said motion transmission means between said drive shaft and said crank drive shaft comprises meshing gears having a one-to-one ratio.
Claim 5
Dependent Claim
19 words
An apparatus as claimed in claim 1 in which said drive shaft and said output shaft are axially aligned.
Claim 6
Dependent Claim
68 words
An apparatus as claimed in claim 1 in which said output shaft carries a crank member offset from the axis of rotation of the output shaft, a rack member mounted for rectilinear reciprocal motion adjacent said output crank member and having an elongated transverse slot into which said output shaft crank member extends whereby rotation of the output shaft is transformed into rectilinear motion of said rack member.
Claim 7
Dependent Claim
36 words
An apparatus as claimed in claim 5 in which the offset of said output shaft crank member from the axis of rotation of the output shaft is adjustable to vary the throw of said rack member.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |