US2808144A - Carriage retarding mechanism for typewriters or like machines - Google Patents

Carriage retarding mechanism for typewriters or like machines Download PDF

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Publication number
US2808144A
US2808144A US492220A US49222055A US2808144A US 2808144 A US2808144 A US 2808144A US 492220 A US492220 A US 492220A US 49222055 A US49222055 A US 49222055A US 2808144 A US2808144 A US 2808144A
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US
United States
Prior art keywords
carriage
cylinder
travel
stem
plunger
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
US492220A
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English (en)
Inventor
Harry L Lambert
Carl B Spong
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.)
Royal Mcbee Corp
Original Assignee
Royal Mcbee 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
Priority to NL88968D priority Critical patent/NL88968C/xx
Application filed by Royal Mcbee Corp filed Critical Royal Mcbee Corp
Priority to US492220A priority patent/US2808144A/en
Priority to GB4132/56A priority patent/GB788487A/en
Priority to DER18351A priority patent/DE1044115B/de
Priority to FR1146849D priority patent/FR1146849A/fr
Priority to CH332160D priority patent/CH332160A/fr
Application granted granted Critical
Publication of US2808144A publication Critical patent/US2808144A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • 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
    • B41J19/04—Sound-deadening or shock-absorbing devices or measures therein
    • B41J19/10—Dash-pots
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/76—Dynamic electron-multiplier tubes, e.g. Farnsworth multiplier tube, multipactor

Definitions

  • This invention relates to carriage retarding mechanism for typewriter or like machines, and more particularly to mechanism for snubbing or retarding the machine carriage when it is approaching a limit position in either its letter spacing or its return travel.
  • An object of the present invention is to provide improved typewriter or like machine carriage retarding mechanism characterized by the ability to exercise a control over the deceleration of the carriage which varies according to the speed at which the carriage is travelling when it approaches the position at which it is to be stopped.
  • the retarding mechanism provides greater resistance to carriage travel when the carriage is moving relatively fast at the time the mechanism is activated than when the carriage is moving relatively slowly at the time of activation.
  • Another object of the invention is to provide retarding mechanism having the desirable characteristic referred to and which includes a dash pot or fluid cushioning device equipped with valve means automatically responsive to differences in carriage speed for variably controlling the flow or exhaust of cushioning fluid so as automatically to provide a relatively large retarding effect when the carriage is travelling at high speed, and a relatively small retarding efiect when the carriage is travelling at low speed.
  • valve means includes an element formed of resilient material capable of being deformed to greater or lesser degree upon engagement with a cooperable valve element for thereby permitting relatively restricted or relatively unrestricted exhausting of fiuid from the dash pot cylinder according to whether the relative approaching speed of the valve elements is fast or slow.
  • a further object of the invention is to provide typewriter or like machine carriage retarding dash pot mechanism including a valve operable initially to cause a relatively restricted exhausting of fluid from the dash pot cylinder at the instant of activation of the retarding mechanism, followed by a progressively decreasing restriction of the exhausting of fluid, irrespective of the carriage speed at the instant of activation of the retarding mechanism.
  • Figure 1 is a fragmentary view, partly in rear elevation and partly in section, showing shock absorber mechanism embodying the invention in connection with parts of a typewriter stationary frame and movable carriage;
  • Figure 2 is a fragmentary rear elevational view of a typewriter main frame part and portions of the shock absorber mechanism shown in Figure 1;
  • Figure 3 is a fragmentary perspective view of the parts shown in Figure l with part of a dash pot cylinder broken away to enable illustration of interior parts;
  • Figure 4 is a fragmentary perspective view of a dash pot plunger stem drawn on an enlarged scale.
  • Figure 5 is a schematic view depicting shock absorber mercham'sm embodying the invention applied to a typewriter equipped with a power operated carriage returning mechanism.
  • Figure 5 shows schematically a typewriter main frame or fixed rail member 1 on which a carriage rail member 2 is mounted for letter spacing and return travel.
  • the carriage rail 2 is supported on the frame rail 1 by rollers or balls 3 in a known manner.
  • a carriage returning draw band 4 is connected to the carriage rail member 2 and extends to the left as viewed in Figure 5 (to the right as viewed from the front of the machine), around a guide roller 5, and thence to motor driven mechanism (not shown) for winding up the draw band 4 and moving the carriage in the return direction, that is toward the right as viewed from the front of the machine and toward the left as viewed in Figure 5, in the direction of the arrow a.
  • the mechanism for operating the draw band 4 may be of any suitable or preferred construction, such for example as the construction shown in the patent to Hart No. 2,567,937 granted September 18, 1951.
  • shock absorber mechanism shown in the drawings includes a striker unit 6 secured to a stationary frame part, for example the frame rail member 1, and a dash pot unit 7 secured to the carriage rail member 2.
  • the units 6 and 7 are displaced from each other during most of the carriage travel on the frame, but have parts which are mutually engageable when the carriage moves into a predetermined portion or zone of travel during its return movement.
  • mechanism embodying the invention may be mounted or correlated with respect to other typewriter parts in such a manner as to cause the units 6 and 7 to cooperate with each other when the carriage is traveling in the opposite direction, for example for retarding the carriage with a cushioning effect at the end of a tabulating movement or run during which the carriage travels in the letter spacing direction.
  • the cushioning of the stopping or arresting of the carriage as it approaches a. predetermined limit of travel is eifected by the resistance to exhaustion of fluid, e. g. air, from the dash pot unit 7.
  • the shock absorber mechanism is characterized in that it is responsive to relatively high carriage speed at the time of operation of the shock absorber mechanism for providing a relatively high degree of suubbing or shock absorbing effect, and is responsive to relatively slow travel of the carriage for providing a relatively low degree of shock absorbing or retarding effect.
  • the dash pot unit 7, mounted on the carriage rail 2 by a bracket 3 and screws 9, comprises a cylinder having an outer wall 11, a fixed or integral end wall 12, and a piston or plunger 14 mounted for reciprocation in the cylinder 10.
  • the plunger 14 is formed with a recessed seat 15 receiving one end of a restoring spring 16, the other end of which bears against the fixed cylinder end wall 12.
  • the arrangement is such that normally, that is when the units 6 and 7 are not cooperable for snubbing the carriage, the spring 16 maintains the plunger 14 in about the position shown in Figures 1 and 3, that is toward the shock absorber unit 6.
  • a stem element 17 Integral with the plunger 14 is a stem element 17 which projects outwardly of the cylinder 10 through a central opening 18 in a removable end wall 19 held against a shoulder 20 in the cylinder wall 11 by a circular spring retainer ring 21 expanded into a groove 22 in the cylinder end wall 19.
  • the end wall 19 is formed with a relief opening 23 for enabling air to pass relatively freely into and out of the cylinder space included between the plunger 14 and the end wall 19.
  • An exhaust passage 24 extends axially through the stern element 17 from its outer or free end, at the left in Figure 1, to the root of the spring seat 15 in the plunger 14, and communicates constantly with the cylinder chamber between the plunger 14 and the cylinder end wall 12.
  • Novel valve mechanism incorporated in the shock absorber units 6 and 7 exercises such a control over the yielding movement of the stern element 17 as to render the shock absorber mechanism effective for exerting more or less retarding force on the carriage member according to higher or lower speed of travel of the carriage member as it approaches the position at which it is to be stopped.
  • the valve parts automatically are adjusted to cooperate with one another so as to enable exhausting of air at a rate which varies inversely to variation in the carriage speed, that is to provide for relatively slow or restricted egress of air from the exhaust passage 24 when the carriage is travelling at a relatively high speed at the time of activation of the shock absorber mechanism, and to provide for relatively fast or unrestricted egress of airfrom the exhaust passage when the carriage is travelling at a relatively low speed at the time of activation.
  • the shock absorber unit 6 includes a U-shaped retainer frame or bracket 25 secured to the frame part 1 by a screw 26 and being formed with inwardly extending tongues 27 for holding in place a block element 28 constituted by resilient deformable material, for example rubber.
  • the block element 28 constitutes a combined striker member and valve part the face of which is aligned with the stem 17 with respect to the direction of carriage travel so as to be engageable with the outer end of the plunger stem element 17 when the carriage reaches a predetermined position in its return travel, the end 29 of the stem 17 providing a valve part cooperable with the block element 23 for controlling the rate of exhausting air from the cylinder chamber through the stem passage 24.
  • the construction and manner of cooperation of the valve part 29 and the valve part 28 vary the resistance to flowing of exhaust air between the two valve parts and hence out of the dash pot cylinder.
  • the outer end of the stem 17 is rounded convexly, and is formed with a cross-shaped recess 30 which communicates at its center with the exhaust passage 24.
  • valve part 29 strikes the valve part 28 while moving at a relatively high speed, the initial yielding of the stem 17 and plunger 14 toward the right as viewed in Figures 1 and 3 is relatively small because of the inertia of the plunger and the stem. Consequently, the left end of the stern formed with the valve part 29 will project into the valve part or block 28 as will be permitted by yielding of the resilient material, the end of the stem 17 moving to the position indicated by the dotted line 31 in Figure 2. In these relative positions of the valve parts 28 and 29, a relatively large part of the open face of the cross shaped recess 30 will be covered by the valve part face 28, so that the air being exhausted must flow over a relatively long lateral path, or rather four relatively long lateral paths to pass out from between the two valve parts.
  • the four grooves constituting the cross shaped recess may be tapered from maximum width at the center of the recess to minimum width adjacent to the outer wall of the stem 17.
  • the stem 17 may project into the rubber block so far as to deform the latter sufliciently to cause all, or substantially all, of the recess 30 to be closed, thus momentarily preventing exhausting of air, even slowly, from the dash pot cylinder through the passage 24.
  • a slight rebounding of the carriage, insutficient to prevent its subsequently being properly positioned by the locating means (not shown), will then take place, causing enough relative separation of the valve parts 28 and 29 to uncover the recess 30 partially, thereby enabling exhausing of air, at a controlled rate.
  • the part 29 When the end 29 of the stem 17 engages the valve part 28 while the carriage is moving at relatively low speed, as for example during a short run, the part 29 does not extend 'so far into the block 28, but extends only to a position such as is indicated by the dotted line 32 in Figure 2. Consequently, the diameter of the area of the valve part 29 engaging, the yieldable material 28 will be less than when the parts engaged each other with 5 the carriage travelling at a high speed, and the exposed or free portions of the recess 30 will be greater and the restriction to egress of exhaust air between the valve parts will be less. Consequently, the air in the cylinder chamber will offer less resistance to the yielding movement of the plunger 14, and the shock absorber mechanism will exert less retarding effect on the carriage.
  • valve parts will cooperate so as initially to provide for relatively restricted exhausting of air, followed by progressively less restricted air exhausting. This is due to the self restoring action of the rubber valve part 28pmgresesively after the initial deceleration of the carriage, causing the recess 30 to be opened progressively. Consequently, the air within the dash pot cylinder will offer progressively lessening resistance to continued travel of the carriage, and the carriage driving means will there fore be enabled to move the carriage completely to its desired limit position.
  • shock absorber mechanism for retarding the carriage member when it is moving in a predetermined portion of its travel in said one of said directions comprising a first element; means mounting said first element on one of said members; a second element; means mounting said second element on and for yielding movemet relative to the other of said members and for .cooperation with said first element to be moved thereby as said carriage member moves into said predetermined portion of its travel; and means comprising mutually engageable valve parts mounted respectively on said frame member and said carriage member and exercising a control over the yielding movement of said second element relative to said other of said members which varies according to the speed of said carriage member for rendering said mechanism efiective for exerting more or less retarding force on said carriage member according to higher or lower speed of travel of said carriage member as it moves into said predetermined portion of its travel.
  • shock absorber mechanism for retarding the carriage member when it is moving in a predetermined portion of its travel in said one of said directions comprising a first element; means mounting said first element on one of said members; a second element; means mounting said second element on and for yielding movement relative to the other of said members and for cooperation with said first element to be moved thereby as said carriage member moves into said predetermined portion of its travel; and means for opposing yielding movement of said second element comprising a dash pot including a chamber from which fluid must be exhausted to permit said yielding movement, a passage for exhausting fiuid from said chamber, and a variably closable valve comprising mutually engageable valve parts mounted respectively on said frame member and said carriage member and controlling exhausting of fluid through said passage and being automatically adjustable in response to different speeds of said carriage member as it moves
  • shock absorber mechanism for retarding the carriage member when it is moving in a predetermined portion of its travel in said one of said directions comprising a first element; means mounting said first element on one of said members; a second element; means mounting said second element on and for yielding movement relative to the other of said members and for cooperation with said first element to be moved thereby as said carriage member moves into said predetermined portion of its travel; and means for opposing yielding movement of said second element comprising a dash pot including a chamber from which fluid must be exhausted to permit said yielding movement, a passage for exhausting fiuid from said chamber, and a variably closable valve controlling exhausting of fluid through said passage and including two mutually engageable valve parts which are cooperable in accordance with the speed of carriage member travel for providing between said parts a relatively restricted exhaust opening communicating
  • valve parts are mounted respectively on said frame member and said carriage member 'and are so positioned on their respective mounting members as to be disengaged from each other when said carriage member is positioned relatively to said frame member other than in said predetermined portion of the travel of said carriage member, and are engaged with each other when said carriage member is in said predetermined portion of its travel.
  • valve parts are formed on one of said elements and the other of said valve parts is formed on the other of said elements.
  • valve parts 7.
  • one of said valve parts comprises yieldable cushioning mate- 7 rial and the other of said valve parts has a recess to pro:
  • said yieldable cushioning material being deformable to project into said recess to varying extents in accordance with the rate of relativemovement between said parts at the time of mutual engagement thereof, whereby automatically to provide for relatively restricted exhausting of fluid from said chamber when said carriage member moves into said portion of its travelat relatively high speed and for relatively unrestricted exhausting of fluid from said chamber when said carriage member moves into said. portion of its travel at relatively low speed.
  • shock absorber mechanism for retarding the carriage member when it is moving in a predetermined portins of it ⁇ t a e sai cn s id .tl res iQns comp s a cylin e mounted Q la of sa d mem er r nns r mounted for reciprocation ,in said cylinder; a plunger stem formed with a passage for exhausting fluid from said cy n e ne n m vem n .Q s i p un e fr m a n ma ably restricting theeg hausting of fluid through said pasas in de en nc p th e t v ppr ac n
  • a construction as set forth in claim 9 in which ,one of said parts is formed with a recess communicating @Withsaid passage when said parts engage each other and in which oneof said parts isconstituted by yieldable cushioning material deformable to varying extents in depend- ,ence upon the relative approaching speeds of saidparts at the ,time of mutual engagement thereof for varying the ffective size of said recess and thereby variably restrictiugtexhaust flow through said recess .and passage.
  • shock absorber mechanism for retarding the carriage member when it is moving in a predetermined portion of its travel in said one of said directions comprising a cylinder mounted on one of said members; a plunger mounted for reciprocation in said cylinder in the direction of carriage member travel; a stem fast with said plunger and projecting outwardly of said cylinder; a com bined striker member and valve part mounted on the other of said members in alignment with said stem with respect to the direction of carriage member travel and being engageable with the projecting end of said stem only when said carriage member isin said predetermined portion of its travel; a spring for vyieldably urging said plunger toward said combined striker member and valve part; and an exhaust passage extending from within said Icylinder through said stern and opening at the projecting end thereof.
  • shockabsorber mechanism for retarding the carriage member when it is moving in a predetermined portion of its travel in said one of .said directions comprising a cylinder mounted on one of said members; a plunger mounted for reciprocation insaid cylinder in the :direction of carriage member travel; a stem fast with said plunger and projecting outwardly of said cylinder; :1 combined striker member and valve part of deformable material mounted on the other of said members in alignment with said stem with respect to the direction of carriage member travel and being engageable with the projectingend of said stem only when said ca rriage member is in said predetermined portion of its travel; a spring for yieldably urging said plunger toward said combined striker rnember and valve part; an exhaust passage extending from within said cylinder
  • valve having two mutually engageable parts variably cooperable with each other according to the force one exerts upon the other for initially providing for relatively restricted fluid exhaust at the moment of activation of the shock absorber mechanism, and for-providing for progressively less restricted exhaust as the race exerted by said one of said parts on the other ,dimishes in consequence of retarding of the carriage.
  • shock absorber mechanism for retarding the carriage member When it is moving ina predetermined portion of its travel in said one of i said directions comprising a cylinder mounted on,o,ne o.f said members; a plunger mounted for reciprocation in said cylinder; a i plunger stem formed with a passage for exhausting fluid from said cylinder upon movementvofsaid plunger from .a normal position in "said cylinder, said plunger stem having an end project- .ing beyond said cylinder and formed with a transverse recess communicating with said passage; and a part formed of deformable material mounted on the other of saidfmembers and being engageable with the recessed end of said stem when said carriage member ,moves into said predetermined portion of its travel for variably partially closing said recess according to the
  • shock absorber means comprising a fluid cushioning unit mounted on one of said members and including a cylinder and a plunger mounted for relative reciprocating movement, and first valve means for permitting egress of fluid from said cylinder upon movement of said plunger in one direction relative to said cylinder; and a striker unit having a second valve means mounted on the other of said members in a position to be engaged by said first valve means for causing movement of said plunger in said one direction upon mutual engagement of said first and second valve means, said first and second valve means being cooperable for controlling the rate of egress of fluid from said cylinder according to the shock absorber means comprising a fluid cushioning unit mounted on one of said members and including a cylinder and a plunger mounted for relative reciprocating movement, and first valve means for permitting egress of fluid from said cylinder upon movement of said plunger in one direction relative to said cylinder; and a striker unit having a second valve means mounted on the other of said members in a position to be engaged by said first valve means for causing movement of said plunger in said one
  • shock absorber means for exerting retarding force on said carrialge member throughout a predetermined portion of its movement relative to said frame member, said shock absorber means comprising a fluid cushioning unit mounted on one of said members and including a cylinder and a plunger mounted for relative reciprocating movement, and first valve means for permitting egress of fluid from said cylinder upon movement of said plunger in one direction relative to said cylinder; and a striker unit having a second valve means mounted on the other of said members in a position to be engaged by said first valve means for causing movement of said plunger in said one direction upon mutual engagement of said first and second valve means, said first and second valve means being cooperable for controlling the rate of egress of fluid from said cylinder inversely to the rate of relative movement of said carriage member and said frame member as said carriage member is moving in said predetermined portion of its movement relative to said frame member.
  • shock absorber means for exerting retarding force on said carriage member throughout a predetermined portion of its movement relative to said frame member, said shock absorber means comprising a fluid cushioning unit mounted on one of said members and including a cylinder, a plunger mounted for reciprocating movement in said cylinder, and a stem element projecting from said plunger,
  • said stem element having fluid passage means communicating with the interior of said cylinder for permitting egress of fluid from said cylinder through said stem element when said plunger is moved in one direction relatively to said cylinder; and a striker unit mounted on the other of said members in a position to be engaged by said stem ele. ment to cause said plunger to move in said one direction and to substantially cover said fluid passage means in said stem element so as to restrict the egress of fluid from said cylinder as said carriage member is moving in said predetermined portion of its movement relative to said frame member.
  • shock absorber means for exerting retarding force on said carriage member throughout a predetermined portion of its movement relative to said frame member, said shock absorber means comprising a fluid cushioning unit mounted on one of said members and including a cylinder, at plunger mounted for reciprocating movement in said cylinder, a stem element projecting from said plunger, said stem element having fluid passage means communicating with the interior of said cylinder for permitting egress of fluid from said cylinder through said stem element when said plunger is moved in one direction relatively to said cylinder; and a striker unit mounted on the other of said members in a position to be engaged by said stem element to cause said plunger to move in said one direction and to substantially cover said fluid passage means in said stem element so as to restrict the egress of fluid from said cylinder as said carriage member is moving in said predetermined portion of its movement relative to said frame member, said striker unit having a part formed

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Actuator (AREA)
US492220A 1955-03-04 1955-03-04 Carriage retarding mechanism for typewriters or like machines Expired - Lifetime US2808144A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL88968D NL88968C (ja) 1955-03-04
US492220A US2808144A (en) 1955-03-04 1955-03-04 Carriage retarding mechanism for typewriters or like machines
GB4132/56A GB788487A (en) 1955-03-04 1956-02-09 Improvements in carriage retarding mechanism for typewriters or like machines
DER18351A DE1044115B (de) 1955-03-04 1956-02-21 Geschwindigkeitsabhaengige Papierwagenbremsvorrichtung fuer Schreib- und aehnliche Maschinen
FR1146849D FR1146849A (fr) 1955-03-04 1956-02-27 Mécanisme amortisseur pour machines à écrire ou autres
CH332160D CH332160A (fr) 1955-03-04 1956-03-02 Mécanisme amortisseur de chocs du chariot mobile d'une machine de bureau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US492220A US2808144A (en) 1955-03-04 1955-03-04 Carriage retarding mechanism for typewriters or like machines

Publications (1)

Publication Number Publication Date
US2808144A true US2808144A (en) 1957-10-01

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ID=27534450

Family Applications (1)

Application Number Title Priority Date Filing Date
US492220A Expired - Lifetime US2808144A (en) 1955-03-04 1955-03-04 Carriage retarding mechanism for typewriters or like machines

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US (1) US2808144A (ja)
CH (1) CH332160A (ja)
DE (1) DE1044115B (ja)
FR (1) FR1146849A (ja)
GB (1) GB788487A (ja)
NL (1) NL88968C (ja)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3291909A (en) * 1962-10-25 1966-12-13 Scm Corp Drum printer
US3739899A (en) * 1970-08-03 1973-06-19 Ibm Carriage indexing mechanism
US3750795A (en) * 1970-11-02 1973-08-07 Burroughs Corp Constant force spring carrier return mechanism
US3915280A (en) * 1966-09-21 1975-10-28 Frederick P Willcox Printer format controls
US3923140A (en) * 1973-05-14 1975-12-02 Ricoh Kk Typewriter carriage decelerator
US3944029A (en) * 1974-11-22 1976-03-16 Centronics Data Computer Corporation Damper for printing and the like
US4084681A (en) * 1976-03-15 1978-04-18 Siemens Aktiengesellschaft Drive system for writing carriages in printing systems
US20170197445A1 (en) * 2016-01-13 2017-07-13 Océ Holding B.V. Impact damping device for print-head assembly and printing apparatus incorporating same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359289A (en) * 1979-11-20 1982-11-16 Printronix, Inc. Counterbalanced bidirectional shuttle drive having linear motor
TW571940U (en) 2003-06-03 2004-01-11 Benq Corp Officejet

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1233532A (en) * 1915-02-06 1917-07-17 Elmer B Wilbur Feeding mechanism for type-writing machines.
US2283565A (en) * 1940-04-30 1942-05-19 Royal Typewriter Co Inc Typewriting machine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE414741C (de) * 1922-12-10 1925-06-08 Fred P Gorin Buchhaltungsmaschine mit Tabulatoreinrichtung
US1757134A (en) * 1928-07-23 1930-05-06 Burroughs Adding Machine Co Accounting machine
US1992940A (en) * 1931-10-23 1935-03-05 Underwood Elliott Fisher Co Shock absorbing mechanism for typewriters

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1233532A (en) * 1915-02-06 1917-07-17 Elmer B Wilbur Feeding mechanism for type-writing machines.
US2283565A (en) * 1940-04-30 1942-05-19 Royal Typewriter Co Inc Typewriting machine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3291909A (en) * 1962-10-25 1966-12-13 Scm Corp Drum printer
US3915280A (en) * 1966-09-21 1975-10-28 Frederick P Willcox Printer format controls
US3739899A (en) * 1970-08-03 1973-06-19 Ibm Carriage indexing mechanism
US3750795A (en) * 1970-11-02 1973-08-07 Burroughs Corp Constant force spring carrier return mechanism
US3923140A (en) * 1973-05-14 1975-12-02 Ricoh Kk Typewriter carriage decelerator
US3944029A (en) * 1974-11-22 1976-03-16 Centronics Data Computer Corporation Damper for printing and the like
US4084681A (en) * 1976-03-15 1978-04-18 Siemens Aktiengesellschaft Drive system for writing carriages in printing systems
US20170197445A1 (en) * 2016-01-13 2017-07-13 Océ Holding B.V. Impact damping device for print-head assembly and printing apparatus incorporating same
US9802431B2 (en) * 2016-01-13 2017-10-31 Océ Holding B.V. Impact damping device for print-head assembly and printing apparatus incorporating same

Also Published As

Publication number Publication date
FR1146849A (fr) 1957-11-15
DE1044115B (de) 1958-11-20
CH332160A (fr) 1958-08-31
NL88968C (ja)
GB788487A (en) 1958-01-02

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