US3452850A - Type bar actuator comprising sequentially operating electromagnetically acting devices - Google Patents

Type bar actuator comprising sequentially operating electromagnetically acting devices Download PDF

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Publication number
US3452850A
US3452850A US277424A US3452850DA US3452850A US 3452850 A US3452850 A US 3452850A US 277424 A US277424 A US 277424A US 3452850D A US3452850D A US 3452850DA US 3452850 A US3452850 A US 3452850A
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United States
Prior art keywords
type bar
impact
selector
selector member
type
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Expired - Lifetime
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US277424A
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English (en)
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George Manus
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Individual
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Individual
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Priority claimed from DEM52694A external-priority patent/DE1189089B/de
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    • 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
    • B41J23/00—Power drives for actions or mechanisms
    • B41J23/32—Electromagnetic power drives, e.g. applied to key levers
    • B41J23/34—Electromagnetic power drives, e.g. applied to key levers applied to elements other than key levers
    • B41J23/36—Electromagnetic power drives, e.g. applied to key levers applied to elements other than key levers and acting on type members

Definitions

  • an electromagnetical means for operating the type bar when its respective key is operated comprising a selector member pivotally connected to the type bar for free, unrestrained pivotal movement therewith and normally biased to a retracted or inoperative position and an impact member normally biased to an inactive position.
  • An electromagnet is provided for each of the type bars which is energized upon depression of the key for said bar to pivot the selector member from its retracted position to an extended position wherein a lug formed on the selector member is in the path of movement of the impact rail.
  • an actuating coil for the impact member is energized whereby the impact rail engages the lug of the selector member to effect operation of the type bar and selector member towards a platen.
  • the selector member also includes an elongated blocking lever, the terminal end of which is disposed relative to the bridge on which the type bar rests to prevent pivotal movement of the type bar and which, in the extended position of the selector member clears the bridge to permit pivotal movement of the type bar.
  • the present invention relates to an electric typewriter having electromagnetically actuatable devices for moving the type bars upon operation of the keys.
  • a typewriter of the abovementioned kind is provided, which has a comparatively simple and strong construction, and which thus may be produced at low costs.
  • an electric typewriter having electromagnetically actuatable devices for operating the type bars when the keys are operated, comprising a respective and single selector member for each type bar and one or more electromagnetically actuatable impact members, wherein each of the said single selector members can be electromagnetically brought, on operation of a corresponding key, into an operative position and by the action of a resilient means, into an inoperative position, and in its operative position can receive a mechanical pulse from the or from one of the impact members and can transmit the force of the said pulse to a type bar for operation of the latter, characterized in that each single selector member can directly receive a mechanical pulse from the or from one of the impact members and can directly transmit the force of this pulse to the type bar to be operated.
  • the typing speed can be kept very high, as the time for raising and lowering the type bars does not have to be considered.
  • the expression directly received is meant that a mechanical pulse or impact is dispatched to the respective selector member from the impact member without the interposition of any other member bet-ween the impact member and the selector member.
  • the expression directly transmit means that, when a selector member transmits the force of a mechanical pulse to an associated type bar, this transmission of force is a direct one, i.e. there is no intermediate part or linkage of parts between the selector member and the type bar.
  • FIG. 1 is side view of a type bar with its actuating means and the platen.
  • FIG. 2 shows details of the arrangement according to FIG. 1 in another stage of operation.
  • a selector member 5 is pivoted on the bar 1 at 5b.
  • Theselector member 5 comprises as shown in FIG. 1 a backwards extending part that by aid of a spring 8 is connected to the bar 1 in such a way that the spring 8 pulls the selector member 5 towards the bar to the position shown in FIG. 1.
  • the selector member 5 includes a blocking lever 5a. In the inoperative position of the selector member 5 shown in FIG. 1, the end of the locking portion 5a is retained at any attempt to raise the type bar 1 to the platen, by the bridge 4 on which the type bar 1 rests through the intermediary of an inserted leather plate.
  • the selector member 5 will be prevented from raising the type bar 1 to the plate-n before the coil of the electromagnet 10 is energized.
  • the electromagnet 10 is located below the selected member 5.
  • the coil of the electromagnet 10 is charged when a key corresponding to the type bar 1 is depressed.
  • the selector means 5 is operated, pivots about a bearing 5b and is swung against the force of the spring 8.
  • the locking portion 5a of selector member 5 is turned upwards in the direction indicated by an arrow in FIG. 1 into the position indicated in FIG. 2.
  • the locking portion 5a no longer prevents the type bar 1 from rising towards the platen.
  • a common impact rail 6 may be provided for all type bars, or there may be provided one impact rail for each of several groups of type bars.
  • the impact rail 6 is moved by means of a solenoid, the armature being secured to the impact rail and being pulled into the coil 9 of the solenoid when the coil is energized.
  • the impact bar 6 is kept in its inoperative position by a return spring 7.
  • the described device works as follows: When a key is depressed a circuit is closed through the winding of the magnet coil 10. The selector member 5 is thereby pulled down from the position shown in FIG. 1 into the position shown in FIG. 2. The locking portion 5a is thus moved so that it is no longer retained by the bridge 4 and is free to transmit a mechanical pulse received on its lug 5c, this pulse being delivered by the impact rail 6. Immediately after the energization of the coil 10*, the coil 9 is energized whereby the impact rail 6 is thrust forward and with its impact edge 6a hits the lug 5c. The type bar 1 is thereby thrust towards the platen 3.
  • the requirement of a slight delay in the action of the impact device 6 in relation to the means 5 can be met by electrical means, e.g. by inserting an appropriate electrical component into the circuit of the electromagnet and/or of the soleoid 9. It is also possible to secure this delay by a suitable correlation of the following factors: (a) length of the impact rail 6 (b) the relative weights of the rail 6 and of the selector member 5 (c) strength of the spring 7 (d) the electrical strength of the coils of the electromagnet 10 and of the solenoid 9.
  • FIG. 1 of the operator actuated type keys is designated by the numeral 11, which key upon depression closes the switch 12 and establishes the circuits to the electromagnets 9 and 10.
  • a suitable delay device 13 of any one of a number of wellknown constructions is inserted in the circuit so that upon closing of the switch 12 by operation of a key 11 current is first supplied to the electromagnet 10 and is subsequently supplied to the electromagnet 9, the sequence of operation of said electromagnets 9 and 10 having been previously described.
  • An electric typewriter comprising a frame, a platen, at least one type bar pivotally mounted in said frame, a bridge mounted on said frame supporting the type bar, a key associated with said type bar, a selector member pivotally mounted on said type bar having a lug formed thereon and a blocking lever, and adapted for free, unrestrained pivotal movement with said type bar, an impact member mounted in said frame adapted for movement between an active position and an inactive position, first electromagnet means for actuating the impact member from its inactive to active position, first biasing means normally urging said impact memberto its inactive position, said selector adapted for movement between a retracted position and an extended position wherein said lug is in the path of movement of said impact member, second biasing means normally urging said selector member to its retracted position wherein said blocking lever is disposed relative to said bridge to prevent pivotal move-.
  • second electromagnet means operable upon actuation to move the selector member to an extended position, actuation of a key operable to energize the first and second electromagnet means sequentially whereby the lug of the selector member is engaged by said impact member to effect pivotal movement of said type bartoward said platen.
  • said abutment surface is part of a support member for supporting a type bar when the latter is in its inoperative position resting thereon.
  • An electric typewriter comprising a frame, a platen, at least one type of bar pivotally mounted in said frame, a bridge mounted on said frame supporting the type bar, a key associated with said type bar, a selector member pivotally mounted on said type bar having a lug formed thereon and a blocking lever, and adapted for free, un.
  • first electromagnet means for actuating the impact member from its inactive to active position
  • first biasing means normally urging said impact member to its inactive position
  • said selector adapted for movement between a retracted position and an extended position wherein said lug is in the path of movement of said impact member
  • second biasing means normally urging said selector member to its retracted position wherein said blocking lever is disposed relative to said bridge to prevent pivotal movement of the type bar
  • second electromagnet means operable upon actuation to move the selector member to an extended position
  • actuation of a key operable to energize the first and second electromagnet means to effect sequentially pivotal movement of said selector member to its extended position and then movement of said impact member to its active position whereby the lug of the selector member is engaged by said impact member to effect pivotal movement of said type bar toward said platen.
  • An electric typewriter comprising a frame, a platen, a plurality of type bars pivotally mounted in said frame, a bridge mounted on said frame supporting the type bars, a key associated with each of said type bars, a selector member pivotally mounted on each type bar having a lug formed thereon and a blocking lever, and adapted for free, unrestrained pivotal movement with its respective type bar, an impact member mounted in said frame adapted for movement between an active position and an inactive position, first electromagnet means for actuating the impact member from its inactive to active position, first biasing means normally urging said impact member to its inactive position, each of said selector members adapted for movement between a retracted position and an extended position wherein said lug is in the path of movement of said impact member, second biasing means normally urging each of said selector members to its retracted position wherein said blocking lever is disposed relative to said bridge to prevent pivotal movement of its respective type bar, second electromagnet means for each selector member, each second electromagnet means operable upon en

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
US277424A 1962-04-30 1963-04-30 Type bar actuator comprising sequentially operating electromagnetically acting devices Expired - Lifetime US3452850A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEM52694A DE1189089B (de) 1962-04-30 1962-04-30 Typenhebelantrieb fuer elektrische Schreib- und aehnliche Maschinen
US27742463A 1963-04-30 1963-04-30
FR933225A FR1393241A (fr) 1962-04-30 1963-04-30 Machine à écrire commandées par relais électromagnétiques

Publications (1)

Publication Number Publication Date
US3452850A true US3452850A (en) 1969-07-01

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Application Number Title Priority Date Filing Date
US277424A Expired - Lifetime US3452850A (en) 1962-04-30 1963-04-30 Type bar actuator comprising sequentially operating electromagnetically acting devices

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US (1) US3452850A (fr)
FR (1) FR1393241A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4201489A (en) * 1976-08-04 1980-05-06 Creatcchnil Patent AG Keyboard actuatable with the aid of the fingers of at least one hand

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US747485A (en) * 1902-02-27 1903-12-22 Wyckoff Seamans & Benedict Electrical type-writing machine.
US840120A (en) * 1903-05-27 1907-01-01 Harry T Ambrose Electrical type-writer selecting and operating means.
US1077675A (en) * 1909-12-21 1913-11-04 Addograph Co Type-writer.
US1156288A (en) * 1909-10-13 1915-10-12 Ernest Hausberg Electric type-writer.
US1328736A (en) * 1920-01-20 Electrically-operated typewriter
US1395600A (en) * 1920-01-31 1921-11-01 A corpora
US2499111A (en) * 1949-06-24 1950-02-28 John H Roethel Door lock

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1328736A (en) * 1920-01-20 Electrically-operated typewriter
US747485A (en) * 1902-02-27 1903-12-22 Wyckoff Seamans & Benedict Electrical type-writing machine.
US840120A (en) * 1903-05-27 1907-01-01 Harry T Ambrose Electrical type-writer selecting and operating means.
US1156288A (en) * 1909-10-13 1915-10-12 Ernest Hausberg Electric type-writer.
US1077675A (en) * 1909-12-21 1913-11-04 Addograph Co Type-writer.
US1395600A (en) * 1920-01-31 1921-11-01 A corpora
US2499111A (en) * 1949-06-24 1950-02-28 John H Roethel Door lock

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4201489A (en) * 1976-08-04 1980-05-06 Creatcchnil Patent AG Keyboard actuatable with the aid of the fingers of at least one hand

Also Published As

Publication number Publication date
FR1393241A (fr) 1965-03-26

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