US3299724A - Continuous tendency drive arrangement - Google Patents

Continuous tendency drive arrangement Download PDF

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Publication number
US3299724A
US3299724A US402809A US40280964A US3299724A US 3299724 A US3299724 A US 3299724A US 402809 A US402809 A US 402809A US 40280964 A US40280964 A US 40280964A US 3299724 A US3299724 A US 3299724A
Authority
US
United States
Prior art keywords
drive
disk
pair
shoes
spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US402809A
Other languages
English (en)
Inventor
Jasper S Chandler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US402809A priority Critical patent/US3299724A/en
Priority to GB40712/65A priority patent/GB1105947A/en
Priority to BE670370A priority patent/BE670370A/xx
Priority to FR33225A priority patent/FR1448593A/fr
Priority to DE19651472383 priority patent/DE1472383B2/de
Priority to CH1388465A priority patent/CH424336A/fr
Application granted granted Critical
Publication of US3299724A publication Critical patent/US3299724A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B19/00—Cameras
    • G03B19/18—Motion-picture cameras
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H31/00—Other gearings with freewheeling members or other intermittently driving members
    • F16H31/003—Step-by-step mechanisms for rotary motion
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B1/00—Film strip handling
    • G03B1/40—Film strip handling embodying frictional coupling or clutches
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/32—Details specially adapted for motion-picture projection
    • G03B21/43—Driving mechanisms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/15—Intermittent grip type mechanical movement
    • Y10T74/1526—Oscillation or reciprocation to intermittent unidirectional motion
    • Y10T74/1553—Lever actuator
    • Y10T74/1555—Rotary driven element
    • Y10T74/1556—Multiple acting

Definitions

  • the present invention relates to a continuous tendency drive arrangement and more particularly to a vibratory motor arrangement suitable for energizing a winding and reeling equipment subject to continuous tension considerations.
  • an object of the present invention is to provide an improved tendency drive arrangement.
  • a shaft to be driven has coupled thereto a drive disk peripherally engaged by a pair of drive shoes each pivotally mounted and mutually spring biased to drive the disk.
  • the pivot mounting of these drive shoes is loosely fitted to all-ow the drive shoes to move laterally relative to the disk.
  • a vibratory driving force is applied sequentially to the drive shoes in the region of the spring coupling by means of bifurcated rocker arm pivotable about a fulcrum such that the motion of the drive arm directly counteracts the spring bias and at the same time tends to move the drive shoes to a next increment of the drive disk.
  • the drive shoes are at least partially disengaged respectively from the drive disk surface during this motion. In this manner the driving force of the spring is continuously applied to the disk by at least one drive shoe.
  • FIG. 1 is a top plan View of one embodiment of my invention.
  • FIG. 2 is a partial cross section view taken along the line 22 of FIG 1.
  • FIG. 1 a shaft 10 coupled to a mechanism to be driven.
  • this mechanism may be visualized as a reel for winding tensioned film strips or the like.
  • Such a mechanism continuously tends to unwind because of the film tension.
  • Nonrotatably coupled to the shaft 10 by lock means such as a key 11 is a drive disk 12 engaged at its periphery by a pair of arcuate drive shoes 13 and 14.
  • the drive shoes are what may be termed rigid as opposed to leaf springs and the like which are sometimes used as drive members of vibratory motors.
  • the drive shoes are pivotally supported on hinge pins 16 and 17 respectively which are preferably located diametrically opposite the effective engagement point of the drive shoes 13 and 14.
  • the slots 18 and 19 of the hinge pins 16 and 17 are substantially larger than the hinge pins, allowing limited radial motion of the pivot ends of the drive shoes 13 and 14 respectively.
  • the drive shoes are maintained on 3,299,724 Patented Jan. 24, 1967 the hinge pins by caps 20 indicated in phantom. I prefer that the drive shoes be fabricated from a durable plastic such as a stabilized nylon.
  • the disk 12 may be made of metal.
  • Tension of the drive shoes 13 and 14 relative to the drive disk 12 is maintained by a relatively compliant precalibrated spring 21 made of a material such as piano wire and coupled between the drive shoes at points spaced from the pivot pins 16 and 17 respectively.
  • the spring 21 develops an outward driving force as indicated by the arrows 22 and 23.
  • the spring force 23 causes a shoe force 24 to be applied to disk 12 and directed toward the attachment point of the spring at 23.
  • the line of action of force 24 passes below the center of shaft 10 and therefore creates a right hand torque tending to produce rotation as shown by an arrow 31.
  • the spring force directly controls the drive torque of the system.
  • the spring 21 be recessed in slots 25 in the drive shoes so that the overall thickness of this tendency drive arrangement may be reduced to a thickness of the order of
  • a driving rocker arm 26 is pivoted about a fulcrum point 27 and is driven by an eccentric drive means 28 as indicated by a double-ended arrow 29.
  • the vibratory drive being pivoted at the point 27 creates motion as indicated by the double-ended arrows 30 in the drive arms 32 and 33 of the rocker arm 26.
  • This motion of arm 32 creates a force as indicated by an arrow 35 which is applied to the drive shoe 13 at a point 35a which is a slightly greater distance from fulcrum 16 than the spring force '22.
  • the force 35 therefore largely counteracts the spring force 22, thus greatly reducing the contact force between shoe 13 and disk 12 and causing the shoe 13 to slide at a very low contact pressure to the left on disk 12 to return to its starting :position.
  • the rocker arm 33 creates a pressure, as indicated by an arrow 36, at a point 36a to overcome the spring bias on the drive shoe 14 and similarly return shoe 14 to its starting position while shoe 13 is operative in producing a right hand rotational torque (arrow 31).
  • the points indicated as members 10, 35a, and 27 and 10, 36a, and 27 each form a right angle. Also the points 35a and 36a are each spaced from the pivot IPOIIIIS 16 and 17 a greater radial distance than the spring forces 22 and 23.
  • each shoe produces a disk movement which is limited to the extent that the drive disk 12 is rotatable during each drive increment from zero up to a maximum determined by movement 30.
  • the spring 21 will move the disk in a clockwise direction as indicated by the arrow 31. Also it should be noted that, if little or no disk motion has occurred between successive contacts of the rocker arm 26 against the drive shoes 13 and 14 respectively, only the amount of energy used by the disk is required from rocker arm 26 to restore the shoes to their starting position.
  • my invention is substantially more efficient than other motors of this general type wherein a full stroke is required even if no rotation obtains. Furthermore, it should be noted that the torque imparted to disk 12 is controlled solely by spring 21 and is not subject to change as is the friction, for example, of a slipping clutch.
  • the drive disk 12 be provided with a V-groove as indicated at 40 in FIG. 2.
  • the drive arms as indicated by 13 are provided with a mating V-surface 41, for rolling contact action.
  • the arm mating surfaces 41 are arcs whose centers are essentially at the pivot points 16 and 17 respectively.
  • This V-gr-oove also maintains a proper elevation of the drive shoes 13 and 14 whereby they do not waste energy sliding on other support surfaces.
  • the increased drive friction provided by the V-groove permits the direction of the shoe contact forces such as force 24 for shoe 14 to depart substantially from the radial direction to produce the driving torque without danger of slippage.
  • a tendency drive arrangement comprising:
  • a bifurcated rocker arm drivable to engage each one of said pair sequentially to counteract the spring bias respectively and to move said one end thereof to a new position on said disk to the extent said disk has rotated since a last engagement of said rocker arm on said one;
  • a tendency drive arrangement for a mechanism subject to continuous tension considerations comprising:
  • a pair of arcuate drive shoes positioned to have one end of each engage a separate portion of a peripheral surface of said disk to produce thereon selectively a rolling action
  • a vibratory driving means arranged to engage each one of said pair sequentially to counteract the spring bias respectively and drive said one to move it to a new position on said disk to the extent said disk has rotated since a last engagement of said driving means on said one.
  • each of said pair partially surrounds said disk so that said spring bias acts generally away from said disk and said drive applies force generally toward said disk to thereby lift said one end from said disk during repositioning incremental movement.
  • each of said one end is arcuate, having a center of curvature at said :pivot support means respectively and said vibratory means is located relative to the center of said disk the point of contact between said vibratory driving means and each of said pair forms a right angle.
  • a tendency drive arrangement for a mechanism required to provide continuous torque comprising:
  • a drive disk coupled to the mechanism; a curved drive shoe positioned to have one end engage a portion of the surface of said disk; means for pivotably supporting said shoe and being a loose fit pivot support means to allow outward motion of said one end relative to said disk; spring means coupled to said shoe to bias said one end thereof against said disk and in given tangential direction relative thereof, thereby to tend to rotate said disk in said given direction; and a vibratory driving means drivable to engage said shoe sequentially to counteract the spring bias and to move said one end thereof to a new position on said disk to the extent said disk has rotated since a last engagement of said driving means on said shoe.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Lock And Its Accessories (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Mechanical Operated Clutches (AREA)
US402809A 1964-10-09 1964-10-09 Continuous tendency drive arrangement Expired - Lifetime US3299724A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US402809A US3299724A (en) 1964-10-09 1964-10-09 Continuous tendency drive arrangement
GB40712/65A GB1105947A (en) 1964-10-09 1965-09-24 Unidirectional drive arrangements
BE670370A BE670370A (de) 1964-10-09 1965-09-30
FR33225A FR1448593A (fr) 1964-10-09 1965-09-30 Agencement moteur à sollicitation continue
DE19651472383 DE1472383B2 (de) 1964-10-09 1965-10-07 Vorrichtung zum Antrieb einer drelibaren Welle eines Bandgeräts
CH1388465A CH424336A (fr) 1964-10-09 1965-10-08 Moteur vibrant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US402809A US3299724A (en) 1964-10-09 1964-10-09 Continuous tendency drive arrangement

Publications (1)

Publication Number Publication Date
US3299724A true US3299724A (en) 1967-01-24

Family

ID=23593383

Family Applications (1)

Application Number Title Priority Date Filing Date
US402809A Expired - Lifetime US3299724A (en) 1964-10-09 1964-10-09 Continuous tendency drive arrangement

Country Status (5)

Country Link
US (1) US3299724A (de)
BE (1) BE670370A (de)
CH (1) CH424336A (de)
DE (1) DE1472383B2 (de)
GB (1) GB1105947A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3526149A (en) * 1969-04-14 1970-09-01 Enm Co Verge
US3626452A (en) * 1970-01-14 1971-12-07 Cutler Hammer Inc Multiposition bidirectional rotary means for a switch or the like

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1979028A (en) * 1932-10-20 1934-10-30 Teleregister Corp Pawl and ratchet mechanism
US2269858A (en) * 1940-10-21 1942-01-13 Guardian Electric Mfg Co Ratcheting mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1979028A (en) * 1932-10-20 1934-10-30 Teleregister Corp Pawl and ratchet mechanism
US2269858A (en) * 1940-10-21 1942-01-13 Guardian Electric Mfg Co Ratcheting mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3526149A (en) * 1969-04-14 1970-09-01 Enm Co Verge
US3626452A (en) * 1970-01-14 1971-12-07 Cutler Hammer Inc Multiposition bidirectional rotary means for a switch or the like

Also Published As

Publication number Publication date
DE1472383B2 (de) 1970-05-06
GB1105947A (en) 1968-03-13
CH424336A (fr) 1966-11-15
BE670370A (de) 1966-01-17
DE1472383A1 (de) 1969-03-06

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