US1904518A - Typewriter - Google Patents

Typewriter Download PDF

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Publication number
US1904518A
US1904518A US611894A US61189432A US1904518A US 1904518 A US1904518 A US 1904518A US 611894 A US611894 A US 611894A US 61189432 A US61189432 A US 61189432A US 1904518 A US1904518 A US 1904518A
Authority
US
United States
Prior art keywords
framework
top member
type mechanism
stud
typewriter
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
US611894A
Other languages
English (en)
Inventor
Pateman Arthur
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.)
Imperial Typewriter Co Ltd
Original Assignee
Imperial Typewriter Co Ltd
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 Imperial Typewriter Co Ltd filed Critical Imperial Typewriter Co Ltd
Application granted granted Critical
Publication of US1904518A publication Critical patent/US1904518A/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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/02—Framework

Definitions

  • This invention is for improvements in or relating to typewriters and is concerned with typewriters of the kind comprising a framework housing the type mechanism, including the type bars and operating levers, which framework has a top member at least partially covering the type mechanism. Generally this top member carries the platen and the ribbon spools.
  • One object of the present invention is to render the type mechanism within the framework more readily accessible and the invention comprises a typewriter of the kind described, characterized in that the top member of the framework is readily movable away from the main part of the frame, for
  • the top member of the framework is hinged to the main part of the frame about an axis parallel to that of the platen and at the rear side of the framework and spring-operated latches are preferably provided for retaining the top member of the frame in the normal closed position.
  • these latches comprise levers pivoted on the main part of the framework and formed with cam slots engaging studs carried by the top member.
  • the studs are eccentrically mounted and are provided with means for adjustment in order to ensure that the latches shall firmly hold the top member in the closed position by reason of the cam slots of the latch levers.
  • Figure 1 is a side elevation with the top 50 member in the closed position
  • Figure 2 is an oppositeside elevation with the top member in the open position
  • Flgure 3 is a detail view of one hinge for the top member of the framework
  • Figure 4 is a View at right-angles to Figure 3; w
  • Figure 5 is adetail view of the springclosed latch in the closed position
  • Figure 6 is a view at right-angles to Figure 5;
  • Figure 7 is a view similar to Figure 5 of the latch in the extended position.
  • Figure 8 is a detail of a holding'down stud for the type mechanism.
  • the top-member 14 of the framework carrying the platen carriage indicated at 15 and spools 16 is hinged at the rear side to the main part 10 of the framework by-means of two hinges 17 one on each side of the framework.
  • each' consists of a lug 19 depending from the top member of the frame and located in a recess 20 provided in the rear wall of the main part 10 of the framework by means of a pivot pin 21 screw-threadedin the'lug and having a bearing in. the main frame.
  • the depending lug 19 is formed with an extension 22 which abuts against a stop 23 provided on the main frame 10 in order to limit the opening movement of the top member'l l.
  • top member 1 1 of the framework is retained in the normally closed position bymeans of spring-operated latches 18 one-on each sideof the framework near the front.
  • the top member 14 of the framework is provided with depending lugs 25 each carrying a transverse screwthreaded stud 26, this stud having a cylindrical head 27 and being secured by nuts 28.
  • the latches each comprise a lever 29 pivoted by means of a stud 30 on the main part 10 of the framework and formed with an open-ended cam slot 31.
  • the lever 29 is urged to the closed position of the latch by means of a-tension spring 32, and is provided with an operating knob 33 projecting through a slot 34 in the main framework to the outer side thereof.
  • a stop 39 serves to limit the range of movement of the lever.
  • the lever 29 In the. open position of the top member the lever 29 assumes an approximately vertical position bearing against the stop 39 un-' der the action of the spring 32.
  • the end ofthe lever is formed with a striking surface 36 and in the closing movement of the top member the head27 of the stud 26 bears upon this surface and deflects the lever against the action of the spring 32 until the stud head is opposite the open end of the slot 31 as shown in Figure 7.
  • the lever 29 is then moved by the spring 32 and the slot 31 passes over the stud to hold the top member of the framework in the closed position.
  • the slot 31 in the lever 29 is so constructed that the radial dimension from the pivot 21 of the lever decreases slightly from the open end in order to exert a wedging action on the stud head 27 to hold the top member firmly in the closed position. Furthermore, in order to ensure close fitting of the latch, the head 27 of the stud 26 is slightly eccentric and the position of the head may thus be adjusted by rotation of the stud.
  • each of these studs is carried in a boss-40 formed with the top member of the framework.
  • Each stud 37 (see Figure 8) is provided with a collar 41 and a compression spring 42between the collar, and a web 43 in the boss, so that the stud is springpressed against the type mechanism.
  • the stud is also provided with a retaining collar 44.
  • topmember of the framework is readily moved, onreleasing the latches by means of the operating knobs 33, from the normally closed position, as indicated in Figure 1, to the open position, as shown in Figure 2, to
  • the type mechanism 12 can alsobe removed as a unit from its normal position in the framework without any difficulty.
  • the invention is not restricted to the particular construc tion hereinbefore described with reference to the accompanying drawings.
  • the invention may be applied to typewriters as described in specification No. 257,660 in '65 which the typemecha-nismis supported on runners within the framework and is movable forwardly on these runners to permit the type mechanism to be withdrawn from the front of the machine.
  • the removal of the type mechanism in this construction requires somewhat adept handling, in order to avoid fouling of parts of the type mechanism with the framework.
  • the type mechanism may be'removed from the machine with the utmost ease.
  • a typewriter the combination of a framework, bearing members within said framework, type mechanism removably mounted within said framework and supported-on said bearing members, a top member at least partially covering said type mechanism, a hinge connection between said top member and said framework, locking means for retaining the top member in the closed position and hearing members on said top. member and en-.

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  • Accessory Devices And Overall Control Thereof (AREA)
US611894A 1931-09-18 1932-05-17 Typewriter Expired - Lifetime US1904518A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1904518X 1931-09-18
GB632633X 1931-09-18

Publications (1)

Publication Number Publication Date
US1904518A true US1904518A (en) 1933-04-18

Family

ID=26267871

Family Applications (1)

Application Number Title Priority Date Filing Date
US611894A Expired - Lifetime US1904518A (en) 1931-09-18 1932-05-17 Typewriter

Country Status (2)

Country Link
US (1) US1904518A (fr)
FR (1) FR738486A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2418043A (en) * 1944-06-02 1947-03-25 Royal Typewriter Co Inc Typewriting machine frame
US2902787A (en) * 1957-12-23 1959-09-08 Vernon H Cook Transparency supporting and illuminating device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2418043A (en) * 1944-06-02 1947-03-25 Royal Typewriter Co Inc Typewriting machine frame
US2902787A (en) * 1957-12-23 1959-09-08 Vernon H Cook Transparency supporting and illuminating device

Also Published As

Publication number Publication date
FR738486A (fr) 1932-12-24

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