US3333669A - Tabulation rack - Google Patents

Tabulation rack Download PDF

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Publication number
US3333669A
US3333669A US442988A US44298865A US3333669A US 3333669 A US3333669 A US 3333669A US 442988 A US442988 A US 442988A US 44298865 A US44298865 A US 44298865A US 3333669 A US3333669 A US 3333669A
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US
United States
Prior art keywords
tabulation
fingers
frame structure
slots
strip
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
US442988A
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English (en)
Inventor
John O Schaefer
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Priority to US442988A priority Critical patent/US3333669A/en
Priority to GB253/66A priority patent/GB1075901A/en
Priority to BE677135D priority patent/BE677135A/xx
Priority to DEJ30296A priority patent/DE1259906B/de
Priority to CH369866A priority patent/CH435328A/de
Priority to NL666603316A priority patent/NL146433B/xx
Priority to FR53808A priority patent/FR1471632A/fr
Priority to SE4043/66A priority patent/SE300225B/xx
Priority to ES0324668A priority patent/ES324668A1/es
Application granted granted Critical
Publication of US3333669A publication Critical patent/US3333669A/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
    • B41J21/00—Column, tabular or like printing arrangements; Means for centralising short lines
    • B41J21/02—Stops or stop-racks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49105—Switch making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49609—Spring making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49915—Overedge assembling of seated part
    • Y10T29/49922—Overedge assembling of seated part by bending over projecting prongs

Definitions

  • This invention relates to the design of tabulation racks for printing machines such as typewriters. More particularly, this invention relates to the design of a tabulation rack which is improved both in regard to cost and in regard to functioning.
  • Tabulation racks for use in a tabulation operation are well known in the typewriter and related arts.
  • the tabulator mechanisms permit the machine operator to quickly position printing means relative to paper at a predetermined point on the writing line by depressing a tab keybutton. Movement is initiated by the keybutton, and the movement usually is terminated in response to the movement carrying a member into contact with a stop located properly on a tabulation rack.
  • a tabulator is used in typing columns of figures, indenting paragraphs, and any other operation that requires positioning the printing means to a specific point each time.
  • the tabulator stop member terminates tabulation by physically blocking and absorbing the momentum of a moving carriage.
  • the tabulator stop member merely positions controlling members which stop movement without substantial impact on the tabulator stop member.
  • this invention is designed for use in a tabulation system in which the tabulation stops do not absorb large amounts of kinetic energy.
  • the prior art includes at least one teaching of the idea of using gripping friction to hold the position of tabulation stops.
  • an ear extends from an annular ring.
  • a plurality of such rings are fitted into grooves of a bar, each ring being located at a predetermined position along the bar which corresponds to a tabulation position.
  • the bar carrying the rings is the tabulation rack of this prior art system.
  • the ear of a selected ring may be located in juxtaposition to a top and a bottom projection.
  • the bar is rotated to carry the ear upward.
  • the ear of the selected ring encounters the top projection, causing the ring to slip in its groove.
  • the ear Upon restoring of the bar to its normal position, the ear is then positioned operatively to act as a tabulation stop. The position is maintained by friction between the ring tending to tightly close around the groove in which it fits. To clear a set tabulation stop the above operation is repeated with the exception that the ring is rotated in the opposite direction to bring the ear into abutment with the bottom projection. It has also been suggested elsewhere to eliminate the gripping friction by substituting a viscous material which acts as a heavy drag against any tendency for the rings to move. This invention uses friction positioning, but the ring and ear are replaced by a useful, flexible, and low cost configuration and closing or gripping friction is not used.
  • each tabulation stop is the end of a twisted, thin strip made of resilient material. These strips are each fitted between the teeth of a comb-like structure. The fit is not a press fit; it is the recovery torque of the twisted strips which set up friction producing forces along the sides of the comb.
  • the ends of the strips are joined to a rocking member, and upper and lower projections or abutments are provided by the printing machine as in the prior art. Rocking of the structure brings the end of a selected strip into contact with the projection or abutment.
  • Each thin strip yields along its length and remains in the new position under the infiuence of friction at the comb.
  • the entire tabulation rack assembly can be fabricated from stampings at significantly reduced cost. Furthermore, the structures do not dominate the available space as the angular rings of the prior art do. Two or more of the strip and comb structures can be anchored on the same rocking member to be swung into position to provide different tabulation pitches on the same machine.
  • FIG. 1 shows the tabulation rack and related structures in accordance with this invention.
  • FIG. 2 shows an intermediate used to make the slotted frame and which has preferably been formed by a stamping operation.
  • FIGS. 3a and 3b illustrate the eflicient fashioning of the twisted stop fingers.
  • FIG. 4 shows a side view of an alternative system utilizing the principle of FIG. 1 and also providing a dual escapement pitch capability.
  • FIG. 5 illustrates the system of FIG. 4 with further environmental structures.
  • FIG. 6 is a detail of the means provided in accordance with FIG. 5 to rotate the selected group of stop fingers into operative position.
  • the preferred embodiment of this invention is designed for use with the series 72, single element printer developed several years past and sold in large quantities by the assignee of this invention.
  • IBM Customer Engineering Series 72 Instruction Manual, Form 241-5032-0, copyright, 1961 It is illustrative of the efl'icient structures provided by this invention that no change in structure of the printer is required except changes actually at the tabulation rack.
  • the print element carrier of the series 72 machine remains exactly the same, and it is that carrier which contains top and bottom projections or abutments for use with the tabulation stops and also contains the trip mechanism to free the escapement pawl. It is the escapement pawl entering the escapement rack which terminates tabulation movement in the machine.
  • the rocking member 1 connects by means of crank 3 and linking member 2 to the tab set and clear keybutton in the manner of the prior art.
  • crank 3 connects by means of crank 3 and linking member 2 to the tab set and clear keybutton in the manner of the prior art.
  • the rocking member 1 moves counterclockwise.
  • the rocking member 1 moves clockwise.
  • the angled rocking member 1 fits into a tab set and. clear crank 3 having an angled slot to receive and hold the angled rock- Patented Aug. 1, 1967' ing member 1.
  • the angled rocking member 1 fits into the slot of crank 3 without substantial slippage.
  • the remainder of the structures causing rocking are substantially the same as that of the series 72 machine above mentioned.
  • Rocking arm 1 is an extension of and integral with slotted frame or comb 5.
  • the slotted frame 5 may originally be stamped to form a flat comb-like structure as illustrated in FIG. 2. It is then formed into a semicircular configuration. (See FIG. 1.)
  • the widths of the slots in frame 5 are 0.029i0.002 inch.
  • Spring steel plate 7 Connected to the slotted frame 5 is a spring steel plate 7, firmly anchored by a mounting strap 8. Plate 7 has previously undergone a stamping and twisting operation which has created a plurality of fingers 9. The ends of these fingers 9 function as the tabulation stops.
  • Spring steel plate 7 is preferably 0.025 $0.001 inch so as to avoid a press fit into the slots of frame 5.
  • the invention as shown in FIG. 1 functions with complete and optimum eificiency. To bring the end of a finger 9 into a set position operative to stop the carrier, the
  • top and bottom projections or abutments 10' and 10" carried by the carrier are positioned over and under the ends of a selected finger 9.
  • a manual operation at the keyboard then moves linking member 2 and moves crank 3 counterclockwise. This moves rocking arm 1 counterclockwise.
  • One finger 9 is in operative location with respect to the top and bottom projections or abutments 10' and 10". That finger 9 is prevented from substantial movement by the top projection or abutment 10'. Instead, the selected finger 9 bends throughout its length and thus assumes a new position relative to the slotted frame 5. The new position, of course, will be operative in the future to trip the stop mechanisms of the carrier.
  • the twisted status of each finger 9 results in a torque in the spring steel of which the finger 9 is made.
  • the slotted frame 5 can be fabricated in an efiicient stamping and forming operation. A progressive operation appears to be preferable at this time, including one stamping step and one or two forming steps.
  • FIG. 2 is illustrative of the intermediate formed by stamping and FIG. 1 illustrates the stamped and formed final product.
  • the material of slotted frame 5 is low carbon steel. Frame 5 is case hardened after fabrication so that the spring steel fingers 9 will not gouge the sides of the slots of frame 5.
  • FIGS. 3a and 3b illustrate a one step forming operation practiced on spring steel plate 7.
  • the plate 7 has been stamped into the required, fingered configuration. This can be a one step operation.
  • the steel used was pre-tempered blue stock.
  • the material of one successful, full size model of the invention was a medium carbon steel having a hardness of 40-45 on the Rockwell C scale. In the preferred embodiment it was desirable to lower the longitudinal resilience of the fingers 9 in their middles so that they would bend easily to the proper position. Each finger 9 therefore was stamped to be wide at the distant end and reduced in width at the narrow, intermediate portion.
  • the twisting operation on plate 7 is under control of slotted grips 20.
  • the fingers 7 fits snugly in the slots 22 of the grips 20.
  • the grips each carry a toothed pinion 24.
  • a rack 26 moves across all of the pinions 24 a distance proper to fashion a one-half turn twist in a single movement.
  • the twisted assembly of plate 7 is then dropped into a meshing relationship with the slots of frame 5 and the grips 20 are then removed.
  • each finger is 0.062 inch wide.
  • the reduced middle portion is 0.032i0.004 inch wide.
  • the wide, stop end of each finger is 0.187 inch in length.
  • the narrow, middle portion of each finger is 0.250 inch in length.
  • the wide, stop end of the fingers are separated by a gap of 003810.003 inch.
  • the spring steel plate is 0025:0001 inch in width. This provide a strength substantially greater than is needed for tabulation stop and friction setting. However, this extra strength prevents the fingers from being deformed or broken by return movements of the carrier which are possible, but improper in the preferred utilization. Provision of a positive interlock to prevent such an improper and unnecessary return of the carrier would significantly reduce the required width of the steel plate used.
  • FIG. 4 is illustrative of a very attractive alternative embodiment of this invention.
  • two sets of fingers are provided, each having a different displacement to thereby provide the immediate availability of two tabulation racks of different escapement pitch.
  • FIG. 4 there is a first slotted frame 30 and a second slotted frame 32.
  • first spring plate 34 and a second spring plate 36 each carrying one set of fingers; spring plate 34 carries set of fingers 38 and spring plate 36 carries the second set of fingers 40.
  • the unit is positioned by a'spacer 42. The unit can be rocked from the keyboard in the manner described. Furthermore, a manual setting is available for positioning the entire assembly.
  • the spring 36, frame 32, and finger 40 combination is in operative position to control the tabulation of the carrier, and is in proximity to projections or abutments 43 and 43". With the unit rotated sufficiently counterclockwise, the spring 34, frame 30, and finger 38 combination is operative with the same carrier to provide a new tabulation pitch in the machine.
  • FIG. 5 illustrates the system of FIG. 4 along with its structural environment.
  • the linking member 2 and crank 3 of FIG. 1 are in the form of linking member 51 and a crank 50 of design to allow the rotation of the entire tabulation rack assembly in relation to the crank 50.
  • the rock-V ing arm 52 is integral with the tabulation rack and performs the identical function as rocking arm 1 in the basic embodiment.
  • a manual knob 54 extends from the assembly where it can be grasped by the machine operator.
  • the knob positions a canted shoe 56, which is integrally connected to knob 54 by shaft 58.
  • the opening in crank 50 is semicircular to hold rocking arm 52 in two positions without substantial slippage.
  • the opening has a fulcrum salient 60 upon which rocking arm 52 rides.
  • knob 54 In operation the operator merely rotates knob 54 to select the desired group of stop fingers and thus the desired escapement pitch. Shoe 56, being rigidly held at an angle, forces rocking arm 52 to pivot on fulcrum 60 and to assume a new permanent position in relation to crank 50. As is clear from FIG. 6, knob 54, shaft 58, and shoe 56 must move upwardly when knob 54 is rotated. Means to hold the assembly in place after such rotation for tabula tion operation as herein described are a matter of choice to those skilled in the art. A rotating assembly with locking means is shown in United States Patent 1,380,455. Generally, it will be necessary to move the carrier or other printing means to a distant position so that it will not block the relatively large rotation of the tabulation rack during initial adjustment. After the dual tabulation rack is rotated, however, the operation is identical to that above described with respect to FIG. 1. The rocking arm 52 responds to bellcrank 50 to set the stop fingers in the manner described.
  • the rack of tab stop fingers is located just to the rear of the escapement rack, the tab set and tab clear button located on the keyboard may be rocked forward or back to set or clear a tab stop as discussed more fully above specifically with reference to rocking member 1 and crank 3.
  • the set and clear arm in the machine operates to rotate the tab rack up.
  • a tab stop finger 9 strikes a projection or abutment 10 on the carrier bracket blocking movement of the finger.
  • the finger 9 is forced to rotate inside the slots of the slotted frame 5.
  • the set and clear button on the keyboard is released, the tab rack is restored to the rest position leaving the set tab finger lower than the others.
  • a reverse operation causes a lowered tabulating stop finger 9 to strike a stud or abutment 10 at the bottom of the carrier blocking the movement of the finger 9 while the rack is rotated further.
  • the tab rack is restored to the rest position leaving the tab stop finger 9 even with the others in the unset or cleared position. Because it is the projections or abutmen-ts 10 and 10" on the carrier that sets or clears the tab fingers, the carrier must be positioned at the desired stopping point before an individual set or clear operation can occur.
  • the tab rack is restored to rest from either the set or clear operation by spring biasing means provided within the machine.
  • Movement is allowed by the elongated hole at the tab lever pivot.
  • a notch in the pawl allows it to drop ofi a lug of the tab lever and restore to the escapement rack.
  • Further movement of the carrier moves a tab latch to the right out of its notched relationship with the tab lever.
  • the tab lever restores and allows the backspace pawl to re-enter its rack. Re-entry of the escapement pawl into the escapement rack shortly before effects termination of the movement of the carrier in a small amount of further movement of the carrier.
  • a tabulation rack assembly comprising:
  • a tabulation rack assembly comprising:
  • a tabulation rack assembly comprising:
  • a tabulation rack assembly comprising:
  • each strip at least a second set of thin strips of twisted spring steel fitted in the slots of said second frame structure and anchored at a distal point from said slots on said rotatable member, the twist of each strip creating a torque operative against the sides of the slot to hold each strip by friction, each slot being long enough relative to the strip fitted in the slot to allow each strip to bend throughout its length to assume both set and clear positions for tabulation, and
  • a tabulation rack assembly comprising:
  • each strip at least a second set of thin strips of twisted resilient material fitted in the slots of said second frame structure and anchored at a distal point from said slots on said rotatable member, the twist of each strip creating a torque operative against the sides of the slot to hold each strip by friction, each slot being long enough relative to the strip fitted in the slot to allow each strip to bend throughout its length to assume both set and clear positions for tabulation, and
  • a tabulation rack assembly comprising:
  • said strips 8 at least a second slotted frame structure having a distance between the slots different from the distance between the slots of said first frame structure and anchored on said rotatable member, at least a second set of thin strips of twisted spring steel fitted in the slots of said second frame structure and anchored at a distal point from said slots on said rotatable member, the twist of each strip creating a torque operative against the sides of the slot to hold each strip by friction, each slot being long enough relative to the strip fitted in the slot to allow each strip to bend throughout its length to assume both set and clear positions for tabulation, and means to change the angular position of said rotatable member to at least two positions at which rocking means for said tabulation rack assembly are operative.
  • said strips are narrower than said slots.
  • a tabulation rack assembly comprising:
  • a first set of tabulation stop fingers said fingers being anchored to said rotatable member and comprising thin, yieldable strips extending away from said rotatable member in one direction,
  • a second set of tabulation stop fingers anchored to said rotatable member and comprising thin, yieldable strips extending away from said rotatable member in another direction so that said two sets of fingers diverge and terminate in separate radial positions each displaced sufiiciently from the other position to permit one set of fingers to act independently for tabulation,
  • a tabulation rack assembly comprising:
  • a first set of tabulation stop fingers said fingers being anchored to said rotatable member and comprising thin, yieldable strips extending away from said rotatable member in one direction,
  • a second set of tabulation stop fingers anchored to said rotatable member and comprising thin, yieldable strips extending away from said rotatable member in another direction so that said two sets of fingers diverge and terminate in separate radial positions each displaced sufficiently from the other position to permit one set of fingers to act independently for tabulation,
  • a tabulation rack assembly comprising:
  • a first unitary plate formed into a set of yieldable tabulation stop fingers, said plate being anchored at the side distal from said fingers to said rotatable member so that said fingers extend away from said rotatable member in one direction,
  • a second unitary plate formed into a set of yieldable tabulation stop fingers, said plate being anchored to said rotatable member so said fingers extend away from said rotatable member in another direction so that said two sets of fingers diverge and terminate in separate radial positions each displaced sufficiently from the other position to permit one set of fingers to act independently for tabulation,
  • a tabulation rack assembly comprising:
  • a first unitary plate formed into a set of yieldable tabulation s-tope fingers, said plate being anchored at the side distal from said fingers to said rotatable member so that said fingers extend away from said rotatable member in one direction,
  • a second unitary plate formed into a set yieldable tabulation stop fingers, said plate being anchored to said rotatable member so that said fingers extend away from said rotatable member in another direction so that said two sets of fingers diverge and terminate in separate radial positions each displaced sulficiently from the other position to permit one set of fingers to act independently for tabulation,

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US442988A 1965-03-26 1965-03-26 Tabulation rack Expired - Lifetime US3333669A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US442988A US3333669A (en) 1965-03-26 1965-03-26 Tabulation rack
GB253/66A GB1075901A (en) 1965-03-26 1966-01-04 Tabulating rack for typographical machines and typographical machines incorporating such a rack
BE677135D BE677135A (en)) 1965-03-26 1966-02-28
DEJ30296A DE1259906B (de) 1965-03-26 1966-03-11 Tabuliereinrichtung fuer Schreib- und dergleichen Maschinen
CH369866A CH435328A (de) 1965-03-26 1966-03-15 Tabulatoreinrichtung für Schreib- und dergleichen Maschinen
NL666603316A NL146433B (nl) 1965-03-26 1966-03-15 Tabulatorstoppenstang.
FR53808A FR1471632A (fr) 1965-03-26 1966-03-17 Règle de tabulateur
SE4043/66A SE300225B (en)) 1965-03-26 1966-03-25
ES0324668A ES324668A1 (es) 1965-03-26 1966-03-25 Dispositivo de tabulacion para maquinas de escribir y maquinas similares.

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Application Number Priority Date Filing Date Title
US442988A US3333669A (en) 1965-03-26 1965-03-26 Tabulation rack

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US3333669A true US3333669A (en) 1967-08-01

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US442988A Expired - Lifetime US3333669A (en) 1965-03-26 1965-03-26 Tabulation rack

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US (1) US3333669A (en))
BE (1) BE677135A (en))
CH (1) CH435328A (en))
DE (1) DE1259906B (en))
ES (1) ES324668A1 (en))
GB (1) GB1075901A (en))
SE (1) SE300225B (en))

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429415A (en) * 1967-10-17 1969-02-25 Ricoh Kk Tab programming control system by means of codes
US3583542A (en) * 1968-07-16 1971-06-08 Litton Business Systems Inc Tabular rack assembly
US3834508A (en) * 1971-11-16 1974-09-10 Olympia Werke Ag Multiple pitch margin stop device
JPS49121611A (en)) * 1973-03-21 1974-11-20
US3962768A (en) * 1975-02-10 1976-06-15 Michael Lusko Method of making tape spring
US4134694A (en) * 1976-04-29 1979-01-16 Adlerwerke Vorm. Heinrich Kleyer A.G. Dual pitch tabular stop assembly
US4342152A (en) * 1980-01-30 1982-08-03 Western Electric Company, Inc. Methods of terminating and connectorizing cables
US4348123A (en) * 1980-06-27 1982-09-07 International Business Machines Corporation Tabulation rack with spring pin holding
US4348124A (en) * 1980-06-27 1982-09-07 International Business Machines Corporation Tabulation rack with spring pin holding

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031994A (en) * 1975-12-24 1977-06-28 International Business Machines Corporation Double tab rack for a typewriter

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US443256A (en) * 1890-12-23 Making hair-springs for watch-balances
US458115A (en) * 1891-08-18 Method of electric bending and straightening
US731386A (en) * 1899-07-17 1903-06-16 Thomas Oliver Tabulating attachment for type-writing machines.
US892050A (en) * 1903-08-07 1908-06-30 Underwood Typewriter Co Tabulating attachment for type-writing machines.
US907119A (en) * 1907-09-30 1908-12-22 Underwood Typewriter Co Type-writer attachment.
US973988A (en) * 1905-03-27 1910-10-25 Union Typewriter Co Type-writing machine.
US997517A (en) * 1905-03-27 1911-07-11 Union Typewriter Co Type-writing machine.
US1017301A (en) * 1911-03-06 1912-02-13 Underwood Typewriter Co Type-writer tabulating mechanism.
US1082033A (en) * 1912-09-16 1913-12-23 Underwood Typewriter Co Type-writing machine.
US1901162A (en) * 1931-09-14 1933-03-14 Underwood Elliott Fisher Co Typewriting machine
US1918303A (en) * 1930-03-14 1933-07-18 Coxhead Ralph C Corp Tabulator stop
US2017135A (en) * 1933-10-02 1935-10-15 Underwood Elliott Fisher Co Typewriting machine
US2212692A (en) * 1939-05-01 1940-08-27 Leon L Kitchens Flexible tooth gear
US2935954A (en) * 1954-08-05 1960-05-10 Matthews Blake Eave trough guards
US3062261A (en) * 1954-01-28 1962-11-06 Sears Roebuck & Co Tool for assembling plates in flatwise engagement and method of assembling plates

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US443256A (en) * 1890-12-23 Making hair-springs for watch-balances
US458115A (en) * 1891-08-18 Method of electric bending and straightening
US731386A (en) * 1899-07-17 1903-06-16 Thomas Oliver Tabulating attachment for type-writing machines.
US892050A (en) * 1903-08-07 1908-06-30 Underwood Typewriter Co Tabulating attachment for type-writing machines.
US997517A (en) * 1905-03-27 1911-07-11 Union Typewriter Co Type-writing machine.
US973988A (en) * 1905-03-27 1910-10-25 Union Typewriter Co Type-writing machine.
US907119A (en) * 1907-09-30 1908-12-22 Underwood Typewriter Co Type-writer attachment.
US1017301A (en) * 1911-03-06 1912-02-13 Underwood Typewriter Co Type-writer tabulating mechanism.
US1082033A (en) * 1912-09-16 1913-12-23 Underwood Typewriter Co Type-writing machine.
US1918303A (en) * 1930-03-14 1933-07-18 Coxhead Ralph C Corp Tabulator stop
US1901162A (en) * 1931-09-14 1933-03-14 Underwood Elliott Fisher Co Typewriting machine
US2017135A (en) * 1933-10-02 1935-10-15 Underwood Elliott Fisher Co Typewriting machine
US2212692A (en) * 1939-05-01 1940-08-27 Leon L Kitchens Flexible tooth gear
US3062261A (en) * 1954-01-28 1962-11-06 Sears Roebuck & Co Tool for assembling plates in flatwise engagement and method of assembling plates
US2935954A (en) * 1954-08-05 1960-05-10 Matthews Blake Eave trough guards

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429415A (en) * 1967-10-17 1969-02-25 Ricoh Kk Tab programming control system by means of codes
US3583542A (en) * 1968-07-16 1971-06-08 Litton Business Systems Inc Tabular rack assembly
US3834508A (en) * 1971-11-16 1974-09-10 Olympia Werke Ag Multiple pitch margin stop device
JPS49121611A (en)) * 1973-03-21 1974-11-20
US3871508A (en) * 1973-03-21 1975-03-18 Facit Halda Aktiebolag Tabular device for an office machine
US3962768A (en) * 1975-02-10 1976-06-15 Michael Lusko Method of making tape spring
US4134694A (en) * 1976-04-29 1979-01-16 Adlerwerke Vorm. Heinrich Kleyer A.G. Dual pitch tabular stop assembly
US4342152A (en) * 1980-01-30 1982-08-03 Western Electric Company, Inc. Methods of terminating and connectorizing cables
US4348123A (en) * 1980-06-27 1982-09-07 International Business Machines Corporation Tabulation rack with spring pin holding
US4348124A (en) * 1980-06-27 1982-09-07 International Business Machines Corporation Tabulation rack with spring pin holding

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Publication number Publication date
ES324668A1 (es) 1967-02-01
BE677135A (en)) 1966-07-18
DE1259906B (de) 1968-02-01
CH435328A (de) 1967-05-15
GB1075901A (en) 1967-07-19
SE300225B (en)) 1968-04-22

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