US1409814A - Noiseless pawl and ratchet mechaniem - Google Patents

Noiseless pawl and ratchet mechaniem Download PDF

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Publication number
US1409814A
US1409814A US416577A US41657720A US1409814A US 1409814 A US1409814 A US 1409814A US 416577 A US416577 A US 416577A US 41657720 A US41657720 A US 41657720A US 1409814 A US1409814 A US 1409814A
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US
United States
Prior art keywords
pawl
ratchet
wheel
escapement
escapement wheel
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
US416577A
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English (en)
Inventor
Baeseler Heinrich Franz Edmund
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.)
Akt Ges Vorm Seidel & Naumann
Original Assignee
Akt Ges Vorm Seidel & Naumann
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 Akt Ges Vorm Seidel & Naumann filed Critical Akt Ges Vorm Seidel & Naumann
Application granted granted Critical
Publication of US1409814A publication Critical patent/US1409814A/en
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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
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/18—Character-spacing or back-spacing mechanisms; Carriage return or release devices therefor
    • B41J19/66—Carriage-release mechanisms

Definitions

  • vomr snrnm a munumr, or 11mm, 0mm, 4 comm-non or norsnnsss rawr. um amoun- 1,4oe,s14.
  • My present invention relates to noiseless paw and ratchet mechanism and has for its object to provide a device in which a ratchet is operated in the ordinary manner in one direction by a pawl, means being provided to release said pawl from the ratchet teeth when said ratchet is moved in the opposite direction in order to avoid theclicking noise made by the pawl sliding idly over the ratchet teeth.
  • the ratchet is used as the ordinary escapement wheel of a typewriting machine.
  • b means of which the carriage is moved a ong to space the letters, and it is on the return movement of said carriage to initial position that the release of said pawl from said escapement wheel is brought about permitting a noiseless return of said carriage.
  • Figure '1 is an elevational view of one embodiment of my invention showing the pawl in engagement with the escapement wheel.
  • I:ti1gure 2 is a plan view 0 Figure 1 taken pa y in section.
  • Figure 3 is a view similar to Figure 1 showing the pawl-released from engagement with the escapement wheel.
  • igures 7 and 8 are etails of the pawl and ratchet mechanism shown in Figures 4 and 6. r
  • A represents the-escape-. ment support of a typewriting machine having journalled therein the shaft B mounted upon one end of which is a gear wheel 5 engaging the rack bar 6' by means of which the carriage is moved along in a left to 2, 1919,) of which 7 escapement .dog
  • the 3' is provided with anarm 4 carrying a pln'O and ada ted to engage an arm D project-in from the pawl 1.
  • a stop 10 is supporte ⁇ by the carriage in the path of the pawl 1 to limit the extent'of its movement in a release direction.
  • the escapement d an arm E to which is'attached the link F for operating the mechanism.
  • the frictional hold of said au'xilia ratchet with the escapement wheel 2 is m cient to carry saidzauxiliary ratchet with said escapement wheel as the latter moves in the direction of the arrow and also when 3 is provided with of the pawl 9.
  • thedog 13 which temporarily locks the escapement wheel 12 and the auxiliary pawl 21 are arranged upon the same shaft 22 upon which the pawl 19 is mounted.
  • the auxiliary pawl 21 engages the ratchet wheel 11 which is pressed by the spring disk 14 against the escapement wheel 12.
  • a spring 15 is interposed between the pawl 19 and the auxiliary pawl'2l, the pawl 19 being acted upon by a spring 16.
  • a stop 17 is provided on the dog 13 said stop being adapted to engage the pawl 19.
  • Figures 7 and 8 show the arrangement of the operating mechanism the auxiliary pawl being omitted, Figure 7 showing the inoperative position and Figure 8 the operative position of the .parts.
  • the auxiliary pawl 21 ermits an unimpeded advancing rotation of tile escapement wheel in the direction of the arrow shown in Figure 4:. While during the return rotation as shown in Figure 6 the ratchet wheel 11 acts to turn the pawl in such a manner that the latter carries with it the pawl 19 by means of the stop 20 so far that said pawl i '19 strikes against the stop 23 and accord- 45 ingly remains released during the entire continuance of the return movement.
  • a shaft Ina noiseless pawl and ratchet mechanism, a shaft, an escapement wheel fixed to said shaft, a ratchet wheel rotatably mounted on said shaft, means for holding said ratchet while normally in frictional engagement with said escapement wheel to rotate therewith, a pivoted main pawl engaging said escapement wheel, an auxiliary pawl engageable with said main pawl and said ratchet wheel, means for releasing said pawl to permit movement/of said escapement wheelv in one direction, said escapement wheel when moving in the other direction carrying said ratchet wheel into contact with said auxiliary pawl to push the main pawl to-released position, and a stop engaging said main pawl and acting through said auxiliary pawl to inhibit the rotation of said ratchet wheel, further reverse rotation of said escapement wheel being possible through slippage between the frictional contacting surface of said escapement wheel and ratchet.
  • a noiseless pawl and ratchet mechanism comprising a shaft, an escapement wheel fixed to said shaft, a ratchet wheel rotatably mounted on said shaft and adjacent said escapement wheel, means for holding said ratchet wheel in frictional engagement with said escapement wheel, a main pawl enga cable with said escapement wheel for contro ling the movement thereof in one direction, an a'uxiliar pawl associated with said main pawl an engageable by said ratchet wheel to release said auxiliary pawl on reverse movement of said escapement wheel, a stop to limit the movement of said main pawl and ratchet wheel, further movement of the escapement being permitted through slippage between said escapement tween said ratchet wheel and escapement.

Landscapes

  • Transmission Devices (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Tires In General (AREA)
  • Mechanical Operated Clutches (AREA)
US416577A 1918-07-13 1920-10-12 Noiseless pawl and ratchet mechaniem Expired - Lifetime US1409814A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE335767T 1918-07-13

Publications (1)

Publication Number Publication Date
US1409814A true US1409814A (en) 1922-03-14

Family

ID=38137405

Family Applications (1)

Application Number Title Priority Date Filing Date
US416577A Expired - Lifetime US1409814A (en) 1918-07-13 1920-10-12 Noiseless pawl and ratchet mechaniem

Country Status (4)

Country Link
US (1) US1409814A (fr)
DE (2) DE335767C (fr)
FR (1) FR511683A (fr)
GB (1) GB139798A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2484198A (en) * 1945-12-13 1949-10-11 Emerson Electric Mfg Co Noiseless escapement mechanism
US2913091A (en) * 1955-12-23 1959-11-17 Neumann Erich Noiseless escapement mechanism for typewriting machines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2484198A (en) * 1945-12-13 1949-10-11 Emerson Electric Mfg Co Noiseless escapement mechanism
US2913091A (en) * 1955-12-23 1959-11-17 Neumann Erich Noiseless escapement mechanism for typewriting machines

Also Published As

Publication number Publication date
GB139798A (en) 1921-01-06
DE338612C (de) 1921-06-23
FR511683A (fr) 1920-12-31
DE335767C (de) 1921-04-14

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