US3738267A - Latching device - Google Patents

Latching device Download PDF

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Publication number
US3738267A
US3738267A US00092754A US3738267DA US3738267A US 3738267 A US3738267 A US 3738267A US 00092754 A US00092754 A US 00092754A US 3738267D A US3738267D A US 3738267DA US 3738267 A US3738267 A US 3738267A
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US
United States
Prior art keywords
arm
latching
head
path
latching arm
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
US00092754A
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English (en)
Inventor
J Zofchak
N Avery
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.)
DBS Inc
Original Assignee
Multigraphics 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 Multigraphics Inc filed Critical Multigraphics Inc
Application granted granted Critical
Publication of US3738267A publication Critical patent/US3738267A/en
Assigned to DBS, INC., A MA CORP. reassignment DBS, INC., A MA CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AM INTERNATIONAL, INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L45/00—Kinds or types of addressing machines or of like series-printing machines
    • B41L45/02—Kinds or types of addressing machines or of like series-printing machines using printing plates
    • 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
    • Y10T292/00—Closure fasteners
    • Y10T292/42—Rigid engaging means
    • Y10T292/438—Spring-arm catch

Definitions

  • ABSTRACT A latching device, particularly for latching a head in printing position on a bed in a data recorder.
  • the latching device includes an adjustable stop to precisely position the head in the printing position, and cooperating latch means.
  • the latch means include engagement sur faces and pivoted arms, which move into engagement with the engagement surfaces engaging them at a locking angle. the arms are positionable to insure clearance between the arms and the stop surfaces in the latching position.
  • This invention relates generally to data recorders, and more particularly to latching devices which will firmly latch two pivotally interconnected members of such recorder in a precisely adjustable predetermined position. This invention finds particular application in data recorders which are used for recording variable data onto forms.
  • a common device for recording variable data from printing tokens such as credit cards and variable print wheels is a device which comprises a printing bed and cover member pivoted thereon.
  • the bed member is provided with the variable printing wheels, a slot to receive a credit card and a flat support surface on which is placed a form overlying the credit card and printing wheels.
  • the cover member is pivotal between an open position to allow the form and credit cards to be inserted and removed and a closed or printing position wherein a roller platen is actuated to cause the characters on the credit card and printing wheels to be imprinted onto the form.
  • a latch mechanism which will allow two pivotally interconnected members to be precisely adjusted to a working position and firmly latched in that position to prevent movement upon application of reaction forces tending to move the members from the latched position.
  • FIG. 3 is a perspective view similar to FIG. 2 of the latching mechanism of the present invention in the latched position
  • FIG. 4 is a detailed elevational view of one end component of the latching mechanism of the present invention.
  • the data recorder 10 includes a conventional bed member 12 which has a raised platform 14 thereon.
  • the platform 14 includes a receiving slot 16 adapted to receive and support a printing token, frequently referred to as a card. Such cards have raised printing characters thereon.
  • the platform includes a print wheel opening 18 through which the characters on variable print wheels project.
  • the platform has a surface 20 which is disposed to support a form in overlying relationship with the credit card in the slot 16 and the print wheels in the opening 18.
  • a cover member 22 is provided which is pivotally mounted to the bed member 12 on a shaft 24.
  • the cover member 22 includes a conventional roller platen 26 and form holding shield 28.
  • the cover member 22 is pivotally mounted to swing between an open position which is shown in FIG. 1 and a closed or printing position wherein the shield 28 overlies the top of the form disposed on the support surface 20.
  • the cover member 22 is provided with a pair of depending side plates 30.
  • the rear surface of each side plate is disposed to abut against one of a pair of stop lugs 32, one of which is shown in FIG. 1.
  • Each of the stop lugs 32 is mounted to a portion of a frame 34 by means of a screw 36 extending through a slot 38 formed in the stop lug 32.
  • a screw 36 extending through a slot 38 formed in the stop lug 32.
  • the closed position of the cover member can be precisely adjusted to give the exact desired relationship between the shield 28 and the support surface 20.
  • the manufacture and assembly of the cover member with respect to the bed member need not be precise, but rather can be precisely adjusted even with wide manufacturing tolerances after the machine has been assembled.
  • a pair of L" shaped latching arms 40 are provided, each of which cooperates with one of the side plates 30 of the cover member.
  • the latching arms 40 are mounted at the opposite ends of a shaft 42.
  • the shaft 42 is provided with biasing means which is illustrated in the form of a torsion spring 46.
  • the spring 46 is positioned to urge the shaft 42 to rotate in a counterclockwise direction (as viewed in FIGS. 2 and 3) thus urging the latching arms 40 toward engagement with the side plates 30 when the cover is in the closed position.
  • a pair of cams 48 and 50 are provided on the shafts 24 and 42 respectively which will maintain the latching arms 40 in a ready position when the cover is open, as shown in FIG. 2, but which will disengage from each other and allow the latching arms 40 to move into latching engagement with the side plates 30 when the cover is in the closed position, as shown in FIG. 3.
  • the latching arm 40 when the latching arm 40 moves into latching engagement with the side plates 30 (only one need be described, since the other is identical) the latching arm 40 has a first engagement surface 52 which moves into engagement with a second engagement surface 54 formed on the side plate 30.
  • This engagement takes place by virtue of the spring 46 urging the arm 40 in a counterclockwise direction as shown in FIG. 2 until the engagement surfaces 52 and 54 come into contact with each other.
  • one of the surfaces, (in the disclosed embodiment the second engagement surface) is slightly arcuate in shape. This allows for more of a range of engagement between the surfaces.
  • the engagement of the surfaces 52 and 54 must be at a locking angle so that the reaction forces of the side plate against the arm will not pivot the arm out of engagement but will actually lock the surfaces against each other.
  • This locking angle is related to the position of engagement of the surfaces and the axes of rotation of the arms and the side plates since this is a well known phenomenon, it is not believed that it is necessary to discuss this angle in detail, other than to say that this angle varies with various materials, but usually is less than about 5 to 7 degrees.
  • the method used in the preferred embodiment includes a cam and follower which engages to exert a rotative force on shaft 42 releasing the latching arms after the imprinting stroke has been completed and the roller platen is being returned to its original position.
  • the shaft 42 is mounted at each end in an eccentric collar, one of which is shown at 56, in FIG. 4.
  • the eccentric collar is secured by means of a nut 58 and the nut can be loosened and the eccentric collar turned to raise or lower the shaft to provide proper clearance between the bottom of the side plates 30 and the arms 40.
  • the present invention provides cooperating stop means and latching members which allow for a precise adjustment of a given relative position of the two members with latching possible at the precisely adjusted position without play or movement.
  • a data recorder having a base and a pivotally supported head
  • a swingable arm carried by said head and movable therewith in a path;
  • said stop device means for adjusting said stop device to a selected location within a predetermined range for restraining the movement of said pivoting head at a desired closed position of said head; said arm having a smoothly curved surface positioned with respect to said path in a frontal location upon opening pivotal swing of said arm; and g a latching arm carried by said base and having a lock surface, said latching arm swingable about a pivotal center to move said lock surface in an interference path crossing said path of the arm, said lock surface coming to rest against said smoothly curved surface of said swingable arm at a point within a range over said smoothly curved surface determined by the selected setting of said abutment stop device, said lock surface and the path thereof having an angular relationship with respect to said arm latch surface when mutually engaged such that a force generated by an attempted reversal of said head will fail to create a force component in said latching arm sufficient to move said latching arm to an unlatching position.
  • a data recorder having a base and a pivotally supported head as defined in claim 1 wherein said latching arm has a smoothly curved lock surface.

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  • Common Mechanisms (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
US00092754A 1970-11-25 1970-11-25 Latching device Expired - Lifetime US3738267A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9275470A 1970-11-25 1970-11-25

Publications (1)

Publication Number Publication Date
US3738267A true US3738267A (en) 1973-06-12

Family

ID=22234975

Family Applications (1)

Application Number Title Priority Date Filing Date
US00092754A Expired - Lifetime US3738267A (en) 1970-11-25 1970-11-25 Latching device

Country Status (8)

Country Link
US (1) US3738267A (OSRAM)
BE (1) BE775649A (OSRAM)
CA (1) CA936717A (OSRAM)
DE (1) DE2146920B2 (OSRAM)
FR (1) FR2115376B1 (OSRAM)
GB (1) GB1370334A (OSRAM)
NL (1) NL169443C (OSRAM)
SE (1) SE380208B (OSRAM)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4715298A (en) * 1985-09-27 1987-12-29 National Business Systems, Inc. Electrically powered imprinter

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB753994A (en) * 1954-02-19 1956-08-01 Account Tokens Ltd Improvements in and relating to printing apparatus
US3004487A (en) * 1959-12-07 1961-10-17 Bank Of America Nat Trust & Savings Ass Imprinters
US3138091A (en) * 1964-06-23 Printing machines
GB990409A (en) * 1962-02-19 1965-04-28 Account Tokens Ltd Improvements in or relating to manually operable printing machines
US3221653A (en) * 1962-10-15 1965-12-07 Safeguard Corp Open throat bed and cylinder imprinting machine
US3242859A (en) * 1963-05-02 1966-03-29 Avgerinos Compensating anvil means for a printing machine
US3374733A (en) * 1965-03-22 1968-03-26 Signpress Company Card printing machine and type inking apparatus
US3388660A (en) * 1965-08-24 1968-06-18 Farrington Business Mach Printing machine having means for locking platen assembly from one position to another depending on direction of travel
US3413922A (en) * 1966-04-13 1968-12-03 Addressograph Multigraph Printing plate supporting means in bed and cylinder printing machines
US3447458A (en) * 1966-05-25 1969-06-03 Farrington Business Mach Printing mechanism with traveling cylinder
US3563171A (en) * 1969-12-12 1971-02-16 Addressograph Multigraph Interlock means for printing devices in data recorders and transmitters
US3572242A (en) * 1969-07-14 1971-03-23 Amp Inc Card reader imprinter
US3572241A (en) * 1969-09-22 1971-03-23 Entwistle Co Imprinting device

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138091A (en) * 1964-06-23 Printing machines
GB753994A (en) * 1954-02-19 1956-08-01 Account Tokens Ltd Improvements in and relating to printing apparatus
US3004487A (en) * 1959-12-07 1961-10-17 Bank Of America Nat Trust & Savings Ass Imprinters
GB990409A (en) * 1962-02-19 1965-04-28 Account Tokens Ltd Improvements in or relating to manually operable printing machines
US3221653A (en) * 1962-10-15 1965-12-07 Safeguard Corp Open throat bed and cylinder imprinting machine
US3242859A (en) * 1963-05-02 1966-03-29 Avgerinos Compensating anvil means for a printing machine
US3374733A (en) * 1965-03-22 1968-03-26 Signpress Company Card printing machine and type inking apparatus
US3388660A (en) * 1965-08-24 1968-06-18 Farrington Business Mach Printing machine having means for locking platen assembly from one position to another depending on direction of travel
US3413922A (en) * 1966-04-13 1968-12-03 Addressograph Multigraph Printing plate supporting means in bed and cylinder printing machines
US3447458A (en) * 1966-05-25 1969-06-03 Farrington Business Mach Printing mechanism with traveling cylinder
US3572242A (en) * 1969-07-14 1971-03-23 Amp Inc Card reader imprinter
US3572241A (en) * 1969-09-22 1971-03-23 Entwistle Co Imprinting device
US3563171A (en) * 1969-12-12 1971-02-16 Addressograph Multigraph Interlock means for printing devices in data recorders and transmitters

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4715298A (en) * 1985-09-27 1987-12-29 National Business Systems, Inc. Electrically powered imprinter

Also Published As

Publication number Publication date
GB1370334A (en) 1974-10-16
BE775649A (fr) 1972-03-16
FR2115376A1 (OSRAM) 1972-07-07
DE2146920B2 (de) 1976-03-18
SE380208B (sv) 1975-11-03
NL169443B (nl) 1982-02-16
NL169443C (nl) 1982-07-16
FR2115376B1 (OSRAM) 1977-03-18
DE2146920A1 (de) 1972-06-08
NL7113571A (OSRAM) 1972-05-29
CA936717A (en) 1973-11-13

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Legal Events

Date Code Title Description
AS Assignment

Owner name: DBS, INC., A MA CORP.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AM INTERNATIONAL, INC.;REEL/FRAME:003979/0673

Effective date: 19820325