US3485336A - Variable impression - Google Patents

Variable impression Download PDF

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Publication number
US3485336A
US3485336A US681336A US3485336DA US3485336A US 3485336 A US3485336 A US 3485336A US 681336 A US681336 A US 681336A US 3485336D A US3485336D A US 3485336DA US 3485336 A US3485336 A US 3485336A
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US
United States
Prior art keywords
hammer
spring
impression
suppression
drive
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
US681336A
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English (en)
Inventor
Anthony Gardella
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.)
Varityper Corp
Original Assignee
Varityper Corp
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 Varityper Corp filed Critical Varityper Corp
Application granted granted Critical
Publication of US3485336A publication Critical patent/US3485336A/en
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
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/26—Means for operating hammers to effect impression
    • B41J9/30—Springs

Definitions

  • the internationally known Varityper machine is a differential spacing typewriting device which looks and operates very much like the typewriter. Its keyboard is of standard arrangement, but confines the keys to three banks instead of the usual four. It types directly on paper or on duplicating masters, and the work can be seen in progress just as in the ordinary typewriter. There is not much further resemblance between the differential spacing typewriting machine and the ordinary typewriter, and this invention relates principally to machines of the difierential spacing type.
  • the name Varityper is the registered trademark of Varityper Corporation, New Jersey, USA.
  • a common typewriter employs a plurality of hammers, each with a very limited number of type font characters, usually consisting of the capital and lower case of the same letter of the alphabet.
  • the differential spacing machine employs an anvil which will hold a type font. Each type font bears a grouping having a particular style, point size and horizontal spacing. The machine anvil pivots the type font to place a selected character in alignment with the hammer of the machine for imprinting. The imprinting is between metal parts.
  • the hammer is metal and the type font is metal. Therefore, the impression pressure applied to a particular type font becomes important.
  • the variety of types that can be used on differential spacing typewriting machines range in size from quite tiny to relatively large, and in weight from light to bold face. Consequently, variance in the force with which the hammer presses the paper against the type, referred to as impressions, is needed for the variance in size and weight of types.
  • a hammer 18 and an anvil 19 are positioned for mutual abutment to create a printing impression.
  • the illustrated type of machine employs a removable and replaceable type front 20 carried on the anvil 19.
  • the type font 20 is shown in FIGURE 2 separate from the anvil 19.
  • the type font has a plurality of raised impression characters thereon, and the machine 10 as known and understood in the typing machine art employs means to align a selected one of the characters on the type font in an anvil position for impression impact by the hammer 18.
  • the anvil 19 serves as a track upon which the type font 20 shuttles in order to place the selected character in the position to be struck by the hammer and hence is referred to as placing the character in an anvil position.
  • the operating structure is better seen in FIGURE 2.
  • the operator may select the degree of tension to be applied to the spring 22 by causing point 30 to move away from the tail end of hammer 18 Where it is connected at point 40. Then, according to the setting of the handle 24, whenever the hammer 18 is released it will fly forward to strike the selected character on the type font 20 with the released energy of the spring 22.
  • a typewriting machine having a single impression striking hammer, a type font with a plurality of separate raised impression characters thereon, and a keyboard with a plurality of keys with means responsive to key operation to align a selected one of said characters in an anvil position for impression impact by said hammer, the provision of means to vary the impression impact of said hammer upon a selected type character comprising:

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  • Accessory Devices And Overall Control Thereof (AREA)
US681336A 1967-11-09 1967-11-08 Variable impression Expired - Lifetime US3485336A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US68133667A 1967-11-09 1967-11-09

Publications (1)

Publication Number Publication Date
US3485336A true US3485336A (en) 1969-12-23

Family

ID=24734844

Family Applications (1)

Application Number Title Priority Date Filing Date
US681336A Expired - Lifetime US3485336A (en) 1967-11-09 1967-11-08 Variable impression

Country Status (3)

Country Link
US (1) US3485336A (fr)
FR (1) FR1570964A (fr)
GB (1) GB1237889A (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1918300A (en) * 1929-10-15 1933-07-18 Coxhead Ralph C Corp Means to vary the blow of the printing hammer
US2051112A (en) * 1932-11-28 1936-08-18 Coxhead Ralph C Corp Means to vary the impact of the printing element in typewriting machines
US3151722A (en) * 1962-09-28 1964-10-06 Olivetti & Co Spa Spring actuated typewriter action with fault sensing means
US3239049A (en) * 1962-06-27 1966-03-08 Ibm Impression control mechanism automatically selecting one of a plurality of cams
US3382963A (en) * 1966-08-17 1968-05-14 Ibm Printing apparatus with no-print feature

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1918300A (en) * 1929-10-15 1933-07-18 Coxhead Ralph C Corp Means to vary the blow of the printing hammer
US2051112A (en) * 1932-11-28 1936-08-18 Coxhead Ralph C Corp Means to vary the impact of the printing element in typewriting machines
US3239049A (en) * 1962-06-27 1966-03-08 Ibm Impression control mechanism automatically selecting one of a plurality of cams
US3151722A (en) * 1962-09-28 1964-10-06 Olivetti & Co Spa Spring actuated typewriter action with fault sensing means
US3382963A (en) * 1966-08-17 1968-05-14 Ibm Printing apparatus with no-print feature

Also Published As

Publication number Publication date
GB1237889A (fr) 1971-06-30
FR1570964A (fr) 1969-06-13

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