US3308672A - Switch closure mechanism - Google Patents

Switch closure mechanism Download PDF

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Publication number
US3308672A
US3308672A US439405A US43940565A US3308672A US 3308672 A US3308672 A US 3308672A US 439405 A US439405 A US 439405A US 43940565 A US43940565 A US 43940565A US 3308672 A US3308672 A US 3308672A
Authority
US
United States
Prior art keywords
shaft
closure
linkage
driven shaft
switch
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
US439405A
Other languages
English (en)
Inventor
Patrick Richard William
Mcfadden Bruce Richard
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.)
Vertex Industries Inc
Original Assignee
AMP Inc
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 AMP Inc filed Critical AMP Inc
Priority to US439405A priority Critical patent/US3308672A/en
Priority to GB9272/66A priority patent/GB1077074A/en
Priority to FR52589A priority patent/FR1470864A/fr
Priority to NL666603077A priority patent/NL141000B/xx
Priority to DEA51795A priority patent/DE1264117B/de
Priority to SE3281/66A priority patent/SE319034B/xx
Application granted granted Critical
Publication of US3308672A publication Critical patent/US3308672A/en
Assigned to VERTEX INDUSTRIES, INC., A CORP.OF NJ reassignment VERTEX INDUSTRIES, INC., A CORP.OF NJ ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AMP INCORPORATED A CORP. OF NJ
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/06—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means which conduct current when a mark is sensed or absent, e.g. contact brush for a conductive mark
    • 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
    • Y10T74/18—Mechanical movements
    • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary

Definitions

  • This invention relates to an improved closure mechanism for multiple electrical switches, particularly of the type utilized to read data cards.
  • the displacement-force characteristics to effect complete closure generally begin with a low value and then increase rather sharply and continuously to the end of the closure cycle. Because of this the operator of such devices must exert an ever increasing force against the operating mechanism. Psychologically this is bad and practically it tends to cause improper closure; the operator stopping at some point before the full closure cycle is completed.
  • the present invention features a driving mechanism including a series of lever arms linked in a manner to develop an ever increasing mechanical advantage which is caused to approach infinity in the last part of the closure cycle. Additionally, the driving mechanism contemplated by the invention is so arranged that the driving force throughout the complete cycle is in a constant direction, terminated by a fixed stop position to lock further travel only after the driving stroke has been completed.
  • FIGURE 1 is a perspective of the multiple switch assembly of the invention embodied in a card reader device
  • FIGURE 2 is a perspective of the drive mechanism of the device of FIGURE 1;
  • FIGURES 3-6 are plan views showing the operating linkage of the drive mechanism at various positions throughout a complete stroke or cycle of operation.
  • FIGURE 7 is a plot of force vs. displacement included to explain the operation of the linkage of the invention.
  • the assembly 10 represents what is known as a static card reader. It is the function of the device to receive a data card having holes punched therein and to read such card by developing electrical signals on leads associated with the presence of such holes.
  • the assembly 10 includes a base 22, and a drawer 30 which is adapted to be driven from an open position to the closed position shown to carry the data card into engagement with a series of contact spring members under increasing wedging pressure. This results in the spring members penetrating available card holes to contact printed circuit pads disposed on the upper face of 30.
  • the various movements of the drawer are controlled by an operating handle here shown as 40 which is pulled out to the position shown by the dotted line to open the drawer and is pushed in to the position shown solidly to close the drawer to effect reading.
  • the driving mechanism shown in perspective in FIG- URE 2 includes a bracket 42 afiixed to the side of the reader base 22.
  • This bracket is generally U shaped and includes a cover plate 44 which is positioned to cover the driving mechanism as indicated in FIGURE 1.
  • apertures 46 adapted to support the sliding movement of the driving mechanism and contain the drive train and linkage which is comprised of a shaft 48 links 50 and 52 which are tied thereto and further to a shaft 54.
  • Rotary movement of the shaft 54 operates to drive the reader drawer 30 in and out of the assembly described in the above mentioned applications.
  • a recess 49 which serves to accommodate the volume of link 50 when the operating mechanism is in the outward position with the drawer 30 of assembly 10 open.
  • a pin member shown as Sila which projects outwardly of the diameter of the shaft 48 to limit outward movement of the handle 40 and the shaft 48.
  • the link is bifurcated to accommodate the upper end of shaft 52 which is tied thereto for pivotal movement by a pin shown as 520.
  • a compression spring 58 Surrounding shaft 48 proximate the outer leg of bracket 42 is a compression spring 58 which serves to drive the shaft 48 inwardly by an engagement with 50a as shown in FIGURE 3. This rotates shaft 54 in a clockwise sense to operate the card ejector mechanism to a retracted position and prepare the assembly to receive a new card.
  • a set-screw shown as 60 which may be adjusted to act as a stop for limiting inward travel of the driving mechanism by engaging the top or right hand surface of link 50.
  • FIGURE 3 the handle and operating mechanism is in a position such that the drawer of assembly It) is fully open and ready to receive a card.
  • FIGURE 4 the mechanism is in a position of partial closure and in FIGURE 5 the mechanism is in a position of almost complete closure.
  • FIGURE 6 depicts the mechanism in complete closure at the full end of the closure cycle.
  • FIGURE 7 there is a plot of force versus displacement made up from a test of an actual unit with the upper plot representing the actual force to push the drawer throughout the cycle shown in FIGURES 3-6 and the lower plot B showing the force applied to the handle 40 throughout the same cycle.
  • FIGURE 7 The relative position of the operating mechanism is depicted in FIGURE 7 by reference at the various points A, B, C and D. related respectively to FIGURE-S 36.
  • the first movement of the handle 40 is rior to engagement of the contact springs of the assembly and represents only frictional sliding force including the frictional components of the drawer and of the driving linkage.
  • the linkage In the position of FIGURE 4 or at A, the linkage has begun to encounter the additional forces required to deflect the contact springs of the assembly which as indicated increases rapidly and constantly thereafter.
  • the applied force required increases only slightly due to the increasing mechanical advantage achieved through the linkage. With the linkage as posi- 3 tioned in FIGURE 5 or at C, this mechanical advantage begins to approach infinity even though the force required to close the drawer against the compression of the contact springs has increased substantially in an opposite direction.
  • the increase in mechanical advantage thus means that the final length of the stroke of closure up to the linkage position shown in FIGURE 5 the force actually required is insubstantial and the force required for final closure to the position shown in FIGURE 6 or at D, is in the same direction and constantly decreasing. Because of this the operator exerting the force shown approaching 10 pounds at the position of the linkage shown in FIG- URE 5 is induced to complete the stroke for the last few thousandths of an inch at a decreasing force. Furthermore, since the force required is in the same direction the operator is not likely to stop before full closure is completed.
  • a drive mechanism for providing a controlled rotary movement, a driven shaft to operate an electrical switch, a base supporting said driven shaft for rotary movement, support means attached to said base supporting a second shaft for linear movement, said support means including means to limit said second shaft linear movement between a first and a second position, a linkage connecting said driven and second shafts, said linkage including a first link rigidly secured to said driven shaft and a second link pivotally connected to said first link and to said second shaft, the said linkage being positioned and having points of connection relative to said shafts so as to provide an increasing mechanical advantage as said second shaft is displaced from said first to said second position to a point wherein the force required to displace said second shaft as it approaches the said second position is less than the force required to initiate displacement of said second shaft from said first position whereby to better assure completion of movement and switch operation.
  • a drive mechanism for providing a controlled closure for switch contacts, a switch base, a bracket secured on the side thereof, a driving shaft supported in said bracket for sliding push-pull movement along a given axis, means limiting said movement between first and second positions, a driven shaft supported for rotary movement in said base with the axis thereof transverse to the said given axis, a first lin k fixed to said driven shaft and a second link pivotally connected to said first link and pivotally connected to said driving shaft, the said links being connected to each other and to said shafts at points to provide a mechanical advantage which increases as said driving shaft is displaced from said first position toward said second posi-. tion and further including a connection to each other and to said shafts at points to provide a first rotation in a given direction of said first shaft and then a reverse rotation of said first shaft responsive to movement of said second shaft positively in one direction whereby to assure switch operation.
  • a drive mechanism for providing a controlled closure of switch contacts, a switch base, a driving shaft positioned and secured thereon for sliding movement and including a handle positioned for manual push-pull operation, a driven shaft secured in said base for rotary movement to effect switch operation, a linkage connecting said driving shaft to said driven shaft including links positioned relative to said shafts and connected thereto at points to effect a rotary drive of said driven shaft responsive to manual displacement of said driving shaft with the force required to effect a displacement of said shaft increasing during a first period of displacement and then decreasing during a second portion of displacement whereby to better assure switch operation by including a completed displacement of said shafts.
  • a drive mechanism for manual closure of electrical contacts a contact housing, a driven shaft supported for rotary movement to effect contact closure, :1 driving shaft having an operating handle thereon positioned for manual use and means on said housing supporting said driving shaft for linear movement, means for limiting movement of said driving shaft between said first and second positions, a linkage connecting said driving shaft to said. driven shaft, said linkage being connected at points on said driving shaft and said driven shaft and being positioned to provide a mechanical advantage which increases as said driving shaft is displaced from said first toward said second position so that the force required to displace said driving shaft and said driven shaft is reduced in the last portion of shaft movement.
  • a switch housing for electrical switch operation, a switch housing, a bracket attached to the side thereof having vertically disposed legs, apertures in said legs positioned to receive and support a driving shaft, said driving shaft having a handle thereon positioned for manual use, a driven shaft supported for rotary movement in said base and positioned between said legs, a linkage positioned between said legs connecting said driving shaft to said driven shaft, said linkage being connected between said shafts and positioned whereby to provide rotation in one direction of said driven shaft during a first displacemerit of said driving shaft and then rotation to an opposite direction of said driven shaft responsive to further displacement of said driven shaft in the same direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Conveying Record Carriers (AREA)
US439405A 1965-03-12 1965-03-12 Switch closure mechanism Expired - Lifetime US3308672A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US439405A US3308672A (en) 1965-03-12 1965-03-12 Switch closure mechanism
GB9272/66A GB1077074A (en) 1965-03-12 1966-03-03 Multiple electric switching apparatus
FR52589A FR1470864A (fr) 1965-03-12 1966-03-08 Appareil de commutation multiple
NL666603077A NL141000B (nl) 1965-03-12 1966-03-09 Meervoudig elektrisch schakeltoestel.
DEA51795A DE1264117B (de) 1965-03-12 1966-03-09 Kontakteinrichtung fuer Lochkartenabtaster
SE3281/66A SE319034B (xx) 1965-03-12 1966-03-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US439405A US3308672A (en) 1965-03-12 1965-03-12 Switch closure mechanism

Publications (1)

Publication Number Publication Date
US3308672A true US3308672A (en) 1967-03-14

Family

ID=23744580

Family Applications (1)

Application Number Title Priority Date Filing Date
US439405A Expired - Lifetime US3308672A (en) 1965-03-12 1965-03-12 Switch closure mechanism

Country Status (5)

Country Link
US (1) US3308672A (xx)
DE (1) DE1264117B (xx)
GB (1) GB1077074A (xx)
NL (1) NL141000B (xx)
SE (1) SE319034B (xx)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2473848A (en) * 1947-08-21 1949-06-21 Westinghouse Electric Corp Circuit breaker
US2830759A (en) * 1953-10-23 1958-04-15 Rca Corp Data handling system
US2918275A (en) * 1958-06-27 1959-12-22 Gen Motors Corp Operating apparatus for a pivoted window
US3066863A (en) * 1959-11-20 1962-12-04 Jack A Wilson Sequence control mechanism
US3148251A (en) * 1958-09-10 1964-09-08 Howe Richardson Scale Co Card reader
US3156793A (en) * 1962-05-24 1964-11-10 Datex Corp Contact elements for perforated record reading devices

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2510559A (en) * 1945-11-19 1950-06-06 Ibm Card feeding mechanism

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2473848A (en) * 1947-08-21 1949-06-21 Westinghouse Electric Corp Circuit breaker
US2830759A (en) * 1953-10-23 1958-04-15 Rca Corp Data handling system
US2918275A (en) * 1958-06-27 1959-12-22 Gen Motors Corp Operating apparatus for a pivoted window
US3148251A (en) * 1958-09-10 1964-09-08 Howe Richardson Scale Co Card reader
US3066863A (en) * 1959-11-20 1962-12-04 Jack A Wilson Sequence control mechanism
US3156793A (en) * 1962-05-24 1964-11-10 Datex Corp Contact elements for perforated record reading devices

Also Published As

Publication number Publication date
SE319034B (xx) 1969-12-22
DE1264117B (de) 1968-03-21
NL141000B (nl) 1974-01-15
NL6603077A (xx) 1966-09-13
GB1077074A (en) 1967-07-26

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Legal Events

Date Code Title Description
AS Assignment

Owner name: VERTEX INDUSTRIES, INC., CLIFTON, NJ A CORP.OF NJ

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AMP INCORPORATED A CORP. OF NJ;REEL/FRAME:004167/0768

Effective date: 19830602

Owner name: VERTEX INDUSTRIES, INC., A CORP.OF NJ, NEW JERSEY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AMP INCORPORATED A CORP. OF NJ;REEL/FRAME:004167/0768

Effective date: 19830602