US813281A - Mechanical calculator and recorder. - Google Patents

Mechanical calculator and recorder. Download PDF

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Publication number
US813281A
US813281A US19296104A US1904192961A US813281A US 813281 A US813281 A US 813281A US 19296104 A US19296104 A US 19296104A US 1904192961 A US1904192961 A US 1904192961A US 813281 A US813281 A US 813281A
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platen
bar
key
machine
shuttle
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US19296104A
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Lucien S Crandall
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CRANDALL CONSTRUCTION CO
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CRANDALL CONSTRUCTION CO
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06CDIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
    • G06C7/00Input mechanisms
    • G06C7/02Keyboards
    • G06C7/06Keyboards with one set of keys for each denomination

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  • My present invention relates to mechanical calculators and recorders and to that class of calculators and recorders in which the numbers to be recorded and totalized or subtracted are'determined by depression of selected keys of a series of keys arranged in a suitable number of rows of tenkeys, each row representing the denominational value of the figures to be printed or recorded by the depression of any of its ten keys'-'i. a, hundredths, tenths, units, tens, and so on.
  • FIG. 1 is a top plan View, partly in section, of a mechanical calculator and recorder constructed i'n accordance with my invention.
  • Fig. 2 is a central longitudinal sectional view of thesame.
  • Fig. 2 is a like view on a different sectional line.
  • Fig.3 is a detail front elevation of the recorder-platen and the platen-shift bar.
  • Fig. 4 is a top plan'view, partly in section, showing the cam means for shifting the platen.
  • Fig. 5 is a side elevation of the recorder platen carriage, showing the same out of operative position.
  • Fig. 1 is a top plan View, partly in section, of a mechanical calculator and recorder constructed i'n accordance with my invention.
  • Fig. 2 is a central longitudinal sectional view of thesame.
  • Fig. 2 is a like view on a different sectional line.
  • Fig.3 is a detail front elevation of the recorder-platen and the platen-
  • FIG. 6 is a detail front elevation showing the arrangement of the recorder type'bars.
  • Fig. 7 is a detail sectional side elevation of one of the type-bars, illustrating the means for throwing the same into printing position.
  • Fig. 8 is a similar View showing the type-bar in printing position.
  • Fig. S) is a detail front elevation, partly in section, showing one of the register-dial feed-gears and parts adjacent thereto.
  • Fig. 10 is a detail perspective view showing the adding and subtracting pawi's forming part of the register mechanism.
  • Fig. l is a detail perspective view of the registergovernor.
  • Fig. 12 is a detail perspective view, partly insertion, showing one of the series of carrying devices.
  • Fig. 12 is a detail perspective view, partly insertion, showing one of the series of carrying devices.
  • Fig. 13 is a side elevation of the mechanisnifor returning the register-dialsto their 0 position.
  • Fig. 14 is adetail perspective view of an interlocking collar and sleeve used in the recording and 0 return devices.
  • Fig/15 is a detail perspective view of the dog for preventing theovermotiou of the 0 return mechanism.
  • Fig. 16 is a detail perspecti e view of.
  • Fig. 17 is adetail perspective view'ol" a portion of the 0 return mechanism, showingone of the transmitting-wheels, the stop-pins thereon, .and
  • Fig. 18 is a detail perspective view of a portion of the adding and subtracting mechanism.
  • 1 represents the casing of my improved calculating and recording machine, having mounted thereon a series of key-bars 2, having at their upper ends keys 3 and arranged, preferably, in eight longitudinal rows of ten keys each, although an number of suchrows may be employed, eac rowrepresenting the denominational value of a number registered or recorded by the depression of any one of its ten keys-that is, tens, hundreds, thousands, or other denominationand each of the said keys being numbered and representing a numerical value ranging from 1 to 9 and 0'L. 6.
  • key-bars2 are mounted vertically in the ma-- suitable indieia thereon.
  • Each of the sleeves 5 is loosel mounted on the rock-shaft 6 and, as state is provided with a finger or projection articulating with a key ornotched-faced collar 7, rigidl mounted upon the rock-shaft 6.
  • Rock-shafts 6, of which there are ten in number, one for each lateral row of keys, are controlled by any suitable form of spring, such as'sprin s 8, mounted on the end of said shafts an secured at one end to said shaft and at the other end to the side of the casing 1.
  • a depression of any key will rotate its key-faced sleeve 5 on the shaft 6 beneath said key. Such rotation of the sleeve will through engagement with the collar 7 described rotate the shaft in the direction of the arrow, Fig. 1.
  • each shaft 6 is connected to a particular type-bar, the shaft 6 at the extreme front of t e machine being connected to the first type-bar on the right, (shown in Fig. 6,) the second shaft being connected to the second type-bar, the third shaft being connected to I erforations or holes 19 will be described ater.
  • 21 is the printing-platen, mounted as hereinafter described.
  • Inking-rolls 22 are arranged immediately above and out of contact with the type-heads 17, so that when the said type-heads are projected into printing position they will ass over the surface of said rolls, thereby in ing the type on said heads. Any other suitable means may be em loyed for ink-ing the said type, or direct in ing means ma be done away with entirely and suitable rib on mechanism substituted.- As the pitrnen 11 are shoved forward the teeth 12, engaging the teeth 13' on the crank-arms 14, rotate said crank-arms, forcing the type bar 16 u wardly through perforation 19, the typeead 17 passing over inking-rolls 22.
  • the platen-shiftmg mechanism.-I.n order to determine the denominational value of a' number printed in the manner already described, it is desirable to shift the position of the recorder-platen 21. This I accomplish in the following manner
  • the .frame of the platen-mu-riage comprises a plate 24, hinged at 25 to a sliding late 26, mounted on a guide-bar 27, seate the machine-casing 1.
  • Plate 26 of the recorder-platen frame or carriage is connected to bar through means of a lever 38, pivoted at 39 to a post 40 on a frame 41, mounted at the rear of the machine-casing.
  • Lever 38 is connected at its upper end to the sliding plate 26 by a pivoted link 42 and is forked at its lower end to straddle a pin 43 on slidebar 33.
  • Each of the eight lon itudinal rows of ke Y it above the rockshafts 6 a shuttle-bar 44, extending longitudinally in the casing and provided with a series of pins 45, adapted to engage'cams or' projections 46 on sleeves 5, there being one in 45 for each sleeve 5.
  • ars 44 are twisted, so that their faces are parallel with the bottomof the machine-casmg and slide between and are supported by guide-rollers 47, being supported at their forward ends by rock-arms 9,'loosely mounted on'a shaft 71.
  • Shuttle-bars 44 are, furthermore, formed with cam-surfaces 48 at their rear ends, each of said bars through its cam surface being in a path to-engage one of the antifriction-rollers 34 upon the movement of the said bar.
  • Cam-surfaces 48 face four to the right-hand side of the machine and four to the left-hand side of the machine.
  • Cam-surfaces 48 vary in extent, shape, or size, so. that upon actuation of their respective shuttlebars 44 they will move the SlldG-bfil 33 a distance sufficient to move the platen-carriage to the proper printing position to give the number printed the denominational value determined by the column in which the depressed key is located.
  • the shuttle-bars 44 are returned to their normal positions by springs 44,- secured at one end to the machine-casing and at their other ends in eyes in the said shuttle-bars.
  • a pawl 54 For the urpose of line-spacing on the platen 21 I ave provided a suitable ratchetwheel 53 and beneath the ratchet 53 a pawl 54,havingan elon' ated tooth 54' and pivoted at 55 to t e end 0 a bar 56, pivoted at57 to cars on the machine-casingl.
  • the forward movement of the pawl 54 is limited by a finger 58 on'the heel of the said pawl, enga ing a pin or projection on the bar 56.
  • Paw 54 is held normally in vertical position by a spring 59, mounted on its pivotal pin 55 and secured to a pin or projection 60 on the said pawl.
  • Stem 62 extends downwardly in the casing toa-point just above thebottom of the cas in ,the downward movement of the said stem 1 being limited by the end thereof contacting with the bottomof the casing.
  • a downward de ression of the key 61 raises the rear endofthebar 56, throwing the pawl 54 upwardly teeth of the ratchet-Wheel 53 to rotate the platen 21 a distance equal to one line-space.
  • 61 is a space-key having a stem 62 pivotinto engagement with the type writing construction.
  • the elongated tooth 54' of the pawl 54 is pro-' vided to allow for slight irregularities in the position of the recorder-platen.
  • the flexible connection between the pawl 54 and the bar 56 described is provided to allow the said pawl toride over the teeth of the said ratchet upon the return movement of the key 61 under the influence of its sprin 64.
  • a handwheel 65 is also mounted on theplaten 21, so that the same may be turned forward or backward, as desired, for the purpose of spacing, making corrections, or any other reasons. Any other suitable devices may be used in connection with the recorder-platen carriage, such aspaper guides, rollers, and other attachments common to theordinary Other means may be used for line-spacing and for shifting the platen, if desired.
  • Each of the key-bars 2 excepting the-zero-key bar is provided with a cam-surface 66, facing toward the rear of the machine and each enaging an antifiiction-roller 67 on shuttleiars 68.
  • Shuttle-bars 68 are commensurate in number with the longitudinal rows of keysthat is, one shuttle-bar 68 for the hundreds-column, one for the tens-column, one for the units-column, and so on.
  • Each shuttle-bar 68 is supported by a pair of rock-arms 69 7 O, the rock-arm 69 bein loosely mounted on a shaft 71 at the front 0 the machine, the rock-arm being mounted on a shaft 72 in the rear portion of the casing.
  • vMounted at the upper end of each rock-arm 70 is a subtracting-pawl 73 and an addin -pawl 74, connected by a spring 75 and sli ing in a bifurcated rock-arm '7 6, having a notch 78 in one fork thereof to receive the adding-pawl 74v and a notch 77 in the other fork thereof to receive the subtracting-pawl 73.
  • Rock-arm '76 is rigidly mounted upon a shaft 79, suitably mounted in and extending transverse the casing.
  • a shaft 80 mounted on a shaft 80, extendin transverse the machine, are a series of co lars 81 equal in number to the number of longitudinal'rows of keys employed.
  • a pair of ratchet-wheels 82 83 are rigidly mounted upon or integral witheach collar.
  • the teeth of the ratchet-wheels 82 83 project in The teeth of the ratchetwhe'el 82 are adapted to be'e'n a ed by the adding-pawl 74, and the teeth of t e ratchet- Wheel 83 are adapted to be enga ed-by" the subtracting-pawl 73 in a manner hereinafter described.
  • Each collar 81 has also mounted rigidly thereon a transmittingwheel 84, having a crown-gear 85 meshing with a pinion 86 on a shaft 87. of a register-dial 88.
  • the number of register-dials 88 also corre sponds withthe number of longitudinal rows of keys.
  • 89 isa shift handle or lever suitably pivoted to the machine-casing and pivotally corinected at 90 at its lower end to a bar 91, ex-
  • the shuttlebar 68 Upon the depression of a key 3 the shuttlebar 68 will be forced toward the rear of the machine a distance depending upon the value of the key depressed, ,forcing the rock-arm 70 to the rear and carrying the'pawls 73 74 guide-notches 77 78 respectively.
  • the register indicates the result after a series of operations, whether of addition or subtraction, of all or certain of the numbers recorded 011 the recorder; but as a general the machine the register r05 will show the sum of all the numbers recorded. If it is desired'to transfer this result, Whether it be the sum or the remainder of an addition or subtraction, to the bottom of the column of figures recorded on therecorder IIc without adding or subtracting this result to or from itself onthe register, the handle 89 is movedto its central or vertical position, as shown in Fi 2, in which case both pawls 7 3 and.74 are eld out of the path of en ager1 ment-With their respective ratchet-whee s, so that by the depression of a key, although displacing the shuttle-bar 68 and movingits rockarm 70, no motion will be communicated to the total-dial 88, controlled by the operation r20 of the key depressed,'owing to the fact that the actuating-pawls fail to engage the teeth of their respective ratchet wheels
  • a very sim le mechanism consisting in a rock-arm 94, oosely mounted on theshaft 79, carrying at its outer end a pin 95, upon which is pivotally mounted a hnk 96, connected directly to one of the rock-arms 70.
  • Each of the rock-arms 70 is thus connected to the shaft 7 9.
  • On the pin is an antifriotion-roller 97, adapted to engage any one of the five cam projections 98 on the next adjacent transmitting-wheel 84 of lower dcnomination.
  • the transmittin -wheel 84 may be described as being divide( into five segments, each seg ment including a sufficient number of teeth of the crown-gear 85 to rotate the pinion 86 one revolution, each of such segments being provided with one of the cam projections '98.
  • pawl is in the path of engagement with its pinion, a distance equal to one tooth, thereby increasing or decreasing, such as the case maybe the value of the number on the register-dial of such higher denomination.
  • each of the transmitting- 1 wheels 84 is governed or. controlled by a spring'99, engaginga groove 100 in the pee Springs 99 may be mounted in any'suitable manner such, for instance, as on the bar 101, suitably supported in the machine. 7 i
  • the zero-return mechanism For the purpose of returning the'dials to their zero positions the following mechanism is provided: A shaft 102, extending transversely in the machine-casing, at the forward end thereof,
  • the number of sleeves 103 1 is equal to the number of longitudinal rows of keys and to the number of shuttle-bars 68,
  • sleeve 103 there being one sleeve 103 for each shuttlebar 68.
  • a collar 106 Mounted rigidly on the shaft 102, adjacent each sleeve 103, is a collar 106, having a finger or projection'held normally'in engagement with the notched. end of the sleeve 103 by a spring 107, secured at one end to-the said sleeve and at the other end to the said collar.
  • thedials 88 are arranged on an angle facing the operator, being covered by a raised portion of the casing 1, provided with sight-openings 115.
  • the same gay be shingled or overlapped as shown in I do not wish to be understood aslimiting myself to the exact details of structure herein shown and described,.inasmuch as the same may be varied Without departing from the spirit of my invention.
  • the combination with the key mechanism,the register mechanism actuated thereb an adjustable platen, means for holding said laten normally in central position, a shuttlear,lever means connecting said platen and shuttle-bar, a series of shuttle-bars operatively connected to the keymechanism having camfaces adapted to engage the first-mentioned shuttle-bar to force the platen to either right or left of its central position.
  • a subtracting ratchet-wheel also connected to said transmitting-wheel, pawls for engaging the respective ratchet-Wheels, suitable connection between the key. mechanism and said pawls to actuate the latter simultaneously with the former, and a governor adapt ed to guide either of the pawls into engagement or hold both out of the path of engagement.
  • the combination with the key mechanism and the indicators, oikey-operated pawls for driving said indicators aml means independent of said key mechanism for operating key-actuated pawl ol'highcr denomination at delimte periods m the movement of indicators of lower denomination.
  • anism and the' indicators, of key-operated pawls for driving said indicators means inoperative endependent oi said keymechanism for operating a pawl of higher denomination at definite periods in the movement of an indicator of next lower denomination, and means for moving said pawls into or out of operative engagement.
  • the eombination with an adjustable record-printing platen and record-printing devices of means for moving saidv platen from a normal position for a printing impression,'means for automatically returning said platen to normal position after said impression, a ratchet-wheel on said platen, a pawl for actuating said ratchet and a key-actuated lever for actuating said pawl.
  • the combination with an adjustable record-printing platen and record-printing devices of means for moving said platen longitudinally from a normal positionfor a printing impression, means for automatically re turning said platen to normal position after said impression and key-actuated line-spae ing mechanism.

Description

No. 813,281. PATENTED FEB. 20, 1906.
L. S. GRANDALL. MECHANICAL CALCULATOR AND RECORDER.
APPLICATION FILED FEB.10,1904.
5 SHEETSSHEBT 1- No. 813,281. PATENTED FEB. 20, 1906.
L. s. CRANDALL.
MEGHAI IIGAL CALCULATOR AND RECORDER. APPLICATION FILED PEB.10,1904.
5 SHBETSSHEET 2.
PATENTED. FEB. 20, 1906. L. S. CRANDALL.
MECHANICAL CALCULATOR AND RECORDER. APPLICATION FILED FEB. 10,1904.
6 SHEETS-SHEET 3.
mve/wtoz r r 351 a flitowew'? No. 813,281. PATENTED FEB. 20, 1906.
' L. s. GRANDALL.
I MECHANICAL CALCULATOR AND RECORDER. urmonx ox nun 113.10. 1904.
No. 813,281. PATENTED FEB. 20, 1906.
L. SPORANDALL.
MECHANICAL CALCULATOR AND RECORDER. APPLICATION FILED FEB.10,1904.
5 8HEETSSHEET 5.
l vi two aka awuem Foz I I I I a Swat.) arming UNITED s'ra'rns PATENT OFFICE.
LUOIEN S. (JRANDALL, OF BROOKLYN, NEW YORK, ASSIGNOR TO GRAN- DALL CONSTRUCTION CO, OF BROOKLYN, NEW YORK. A CORPORATION OF ARIZONA TERRITORY.
Specification of Letters Patent.
Patented Feb. 20, 1906.
Application filed February 10, 1904. Serial No. 192,961.
To all whom it rmty concern:
Be it known that I, LUOIEN S CRANDALL, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Mechanical Calculators and Recorders, of which the following is 'a specification.
My present invention relates to mechanical calculators and recorders and to that class of calculators and recorders in which the numbers to be recorded and totalized or subtracted are'determined by depression of selected keys of a series of keys arranged in a suitable number of rows of tenkeys, each row representing the denominational value of the figures to be printed or recorded by the depression of any of its ten keys'-'i. a, hundredths, tenths, units, tens, and so on.
In the present invention it is my object to provide mechanism whereby the registering or recording operation, or both, are completed simultaneously with and solely by the dcprcssion of a key.
In machines of thischaracter it has-been proposed also when it is desired to subtract one number from another to progress a registcringor recording dial or dials or other medium oi register or record until the same indicates the digit or digits of lesser unitary value desired, at the same time dogging or throwing out of operation the carrying mechanism to prevent the feed or progress of theindicating dial or dials or other instrument of next higher value.- This unnecessarily complicates the mechanism. in the machine constructed, in accordance with IIIy-lIIVOTItlUIF subtraction is accomplished by a simple device or devices for reversing the register mechanism.
Further features of my invention are improved means whereby the recording deviee may be thrown out of operation, so that the register maybe used alone, and means whereby the register may be thrown out of operation and the recording device used alone and means preventing the actuation of the register by the adding devices and the subtracting devices at one and the same time.
With a machine constructed in accordance with my invention it is possible to record a series oi numbers on the recorder which may be added and from which other numbers may the platen-sparing pawl.
be subtracted, the result, whether sum or remainder, being indicated on the register, to
suspend actuation of the register so that such result may be transferred to the recorder, to return the register-dials to their zero positions to begin a new operation, or to continue the old calculation by allowing the result obtained to remain on the register-dials.
My invention further consists inmany improved details of construction hereinafter de scribed, and shown in the accompanying drawings, in which like reference-numerals refer to like parts, and in which Figure 1 is a top plan View, partly in section, of a mechanical calculator and recorder constructed i'n accordance with my invention. Fig. 2 is a central longitudinal sectional view of thesame. Fig. 2 is a like view on a different sectional line. Fig.3 is a detail front elevation of the recorder-platen and the platen-shift bar. Fig. 4 is a top plan'view, partly in section, showing the cam means for shifting the platen. Fig. 5 is a side elevation of the recorder platen carriage, showing the same out of operative position. Fig. 6 isa detail front elevation showing the arrangement of the recorder type'bars. Fig. 7 is a detail sectional side elevation of one of the type-bars, illustrating the means for throwing the same into printing position. Fig. 8 is a similar View showing the type-bar in printing position. Fig. S) is a detail front elevation, partly in section, showing one of the register-dial feed-gears and parts adjacent thereto. Fig. 10 is a detail perspective view showing the adding and subtracting pawi's forming part of the register mechanism. Fig. l is a detail perspective view of the registergovernor. Fig. 12 is a detail perspective view, partly insertion, showing one of the series of carrying devices. Fig. 13 is a side elevation of the mechanisnifor returning the register-dialsto their 0 position. Fig. 14 is adetail perspective view of an interlocking collar and sleeve used in the recording and 0 return devices. Fig/15 is a detail perspective view of the dog for preventing theovermotiou of the 0 return mechanism. Fig. 16 is a detail perspecti e view of.
Fig. 17 is adetail perspective view'ol" a portion of the 0 return mechanism, showingone of the transmitting-wheels, the stop-pins thereon, .and
the relative positions of the stop-pins and one of the dog-plates; and Fig. 18 is a detail perspective view of a portion of the adding and subtracting mechanism.
The key system-Referring now'in detail to the drawings, 1 represents the casing of my improved calculating and recording machine, having mounted thereon a series of key-bars 2, having at their upper ends keys 3 and arranged, preferably, in eight longitudinal rows of ten keys each, although an number of suchrows may be employed, eac rowrepresenting the denominational value of a number registered or recorded by the depression of any one of its ten keys-that is, tens, hundreds, thousands, or other denominationand each of the said keys being numbered and representing a numerical value ranging from 1 to 9 and 0'L. 6.,
there being a lateral row of keys for each' number from 1 to 9 and 0. The
key-bars2 are mounted vertically in the ma-- suitable indieia thereon.
Each of the sleeves 5 is loosel mounted on the rock-shaft 6 and, as state is provided with a finger or projection articulating with a key ornotched-faced collar 7, rigidl mounted upon the rock-shaft 6. Rock-shafts 6, of which there are ten in number, one for each lateral row of keys, are controlled by any suitable form of spring, such as'sprin s 8, mounted on the end of said shafts an secured at one end to said shaft and at the other end to the side of the casing 1. A depression of any key will rotate its key-faced sleeve 5 on the shaft 6 beneath said key. Such rotation of the sleeve will through engagement with the collar 7 described rotate the shaft in the direction of the arrow, Fig. 1.
The printing or recording systein.-One of the collars 7 on each of the ten shafts 6 is provided with an upwardly-projecting arm 10, which is connected, through means of a sliding bar or pitman 11 having a rack 12 on its forward end, with pinion-teeth 13 on a crankarm 14,pivotallv mounted on a curved rod or shaft 15, suitably seated or mounted in the rear part of the machine. There are ten crank-arms 14, each of which is connected in the manner described to one of the shafts-6, so that each is controlled by a lateral row of keys. Each crank-arm 14 has pivotally mounted thereon a type-bar 16, at the upper end of which is a type-head 17 with a character thereon. The teeth 12 on bars 11 are held in engagement with the pinion-teeth 13 on the crank-arms 14 by a guide-wheel 18,
. suitably positioned beneath the bars or pitmen 11, and upon which said bars 11 are supported at their forward ends. In this manner each shaft 6 is connected to a particular type-bar, the shaft 6 at the extreme front of t e machine being connected to the first type-bar on the right, (shown in Fig. 6,) the second shaft being connected to the second type-bar, the third shaft being connected to I erforations or holes 19 will be described ater.
21 is the printing-platen, mounted as hereinafter described.
22 represents a series of inking-rolls of any suitable number, but numbering five, as shown in the drawings, one for each two or more or less type-bars rotatably mounted on .a bar 23, shown in the drawin s curved to conform to the arrangement oft e type-bars.
Inking-rolls 22 are arranged immediately above and out of contact with the type-heads 17, so that when the said type-heads are projected into printing position they will ass over the surface of said rolls, thereby in ing the type on said heads. Any other suitable means may be em loyed for ink-ing the said type, or direct in ing means ma be done away with entirely and suitable rib on mechanism substituted.- As the pitrnen 11 are shoved forward the teeth 12, engaging the teeth 13' on the crank-arms 14, rotate said crank-arms, forcing the type bar 16 u wardly through perforation 19, the typeead 17 passing over inking-rolls 22. As the crank arm 14 reaches a vertical position the typebar 16, which rests normally in a slanting position, will be vibrated and thrown toward the platen, striking the same, and thereby making the impression.' Such movement of the type-bar being caused by the rotation of the shaft 6 in opposition to its spring 8, the type-bar is returned to its normal position by the return of the said shaft to its normal position by the said spring.
The platen-shiftmg mechanism.-I.n order to determine the denominational value of a' number printed in the manner already described, it is desirable to shift the position of the recorder-platen 21. This I accomplish in the following manner The .frame of the platen-mu-riage comprises a plate 24, hinged at 25 to a sliding late 26, mounted on a guide-bar 27, seate the machine-casing 1.
in standards 28 29 on Pivotedto standard 29 is a shift lever or handle 30, connected to a.
I bar 32. Bar 32 passes through the plate 24,
'ister alone.
which 'is slidable thereon. Such arrangement is provided for the purpose of throwing out the recorder-platen when it is desired to suspend record tem orarily or to'use the reg- It wil be readily seen that the throw of the lever or handle to the rear will carry the platen 21 away from the printing-point. Extending transverse the machine-casing beneath the platen 21 and its 7 frame is a slide or shuttle bar 33, carrying 3 has mounted beneath antifriction-rollers 34. Slide-bar 33 ma be mounted in any suitable manner to slide in either direction transverse the casing 1, and, as shown in the drawings, the same is mounted through slots 35' on the flanged guide-rollers 36, mounted on posts 37 on the bottom of the machine-casing. Plate 26 of the recorder-platen frame or carriage is connected to bar through means of a lever 38, pivoted at 39 to a post 40 on a frame 41, mounted at the rear of the machine-casing. Lever 38 is connected at its upper end to the sliding plate 26 by a pivoted link 42 and is forked at its lower end to straddle a pin 43 on slidebar 33.
Each of the eight lon itudinal rows of ke Y it above the rockshafts 6 a shuttle-bar 44, extending longitudinally in the casing and provided with a series of pins 45, adapted to engage'cams or' projections 46 on sleeves 5, there being one in 45 for each sleeve 5. At their rear ends ars 44 are twisted, so that their faces are parallel with the bottomof the machine-casmg and slide between and are supported by guide-rollers 47, being supported at their forward ends by rock-arms 9,'loosely mounted on'a shaft 71. Shuttle-bars 44 are, furthermore, formed with cam-surfaces 48 at their rear ends, each of said bars through its cam surface being in a path to-engage one of the antifriction-rollers 34 upon the movement of the said bar. Cam-surfaces 48 face four to the right-hand side of the machine and four to the left-hand side of the machine. Cam-surfaces 48 vary in extent, shape, or size, so. that upon actuation of their respective shuttlebars 44 they will move the SlldG-bfil 33 a distance sufficient to move the platen-carriage to the proper printing position to give the number printed the denominational value determined by the column in which the depressed key is located.
From theforegomg it will be seen that at the same time that the key is depressed, throwing the proper type-bar into printing position through mechanism already described, the cam or pro ection 46 on the sleeve 5, partially rotated by the key depressed through engagement with one of the pins or projections 45 on its shuttle-bar 44, will force the said shuttle-b ar forward, throwing the cam-face 48 of said'shuttle-bar into engagement with its antifrictioneroller Mon the bar 33, so that the said bar 33 is moved a distance sufficient to move the platen frame or carriage through the lever 38 to a position to print the number in a position on the platen which will give it the denominational value represented or determined b the position of the column of keys in whic the depressed key islocated.
In view of the foregoing mechanism it is necessary that the platen-carriage rest normally pose I have provided a pair of pivoted arms 49, mounted on the frame 41 and having bearing lugs or projections 50 held normally against the lever 38 by the action of springs 51, holding arms 49 normally against stoppins 52 on the frame 41. By this means each movement'ofthe lever 38, whether to ri ht or'left, will be ino position to one or the ot er of the arms 49, w ich will through springs 51 return the said lever to its central or vertical position. The platen carriage or frame being connected through link 42 to the. lever 38 is therefore held normally in a central position on the bar 27. a It is obvious that anymovement of the lever 38 will communicate in a central position. For this pura proportionate movement to the bar 33, so
that if the bar 33 has been moved to one side or the other of its normal position to bring the carriageto the desired printing position the said bar will, with the other parts described, be returned to its normal position. The shuttle-bars 44 are returned to their normal positions by springs 44,- secured at one end to the machine-casing and at their other ends in eyes in the said shuttle-bars.
For the urpose of line-spacing on the platen 21 I ave provided a suitable ratchetwheel 53 and beneath the ratchet 53 a pawl 54,havingan elon' ated tooth 54' and pivoted at 55 to t e end 0 a bar 56, pivoted at57 to cars on the machine-casingl. The forward movement of the pawl 54 is limited by a finger 58 on'the heel of the said pawl, enga ing a pin or projection on the bar 56. Paw 54 is held normally in vertical position by a spring 59, mounted on its pivotal pin 55 and secured to a pin or projection 60 on the said pawl.
ally connected to the bar- 56 and sliding through a guide-bracket 63.
64 is a coil-s ring mounted on the stem 62, adapted to hold key 61 normally in its forward position. I
Stem 62 extends downwardly in the casing toa-point just above thebottom of the cas in ,the downward movement of the said stem 1 being limited by the end thereof contacting with the bottomof the casing. I
A downward de ression of the key 61 raises the rear endofthebar 56, throwing the pawl 54 upwardly teeth of the ratchet-Wheel 53 to rotate the platen 21 a distance equal to one line-space.
61 is a space-key having a stem 62 pivotinto engagement with the type writing construction.
' opposite directions.
The elongated tooth 54' of the pawl 54 is pro-' vided to allow for slight irregularities in the position of the recorder-platen. The flexible connection between the pawl 54 and the bar 56 described is provided to allow the said pawl toride over the teeth of the said ratchet upon the return movement of the key 61 under the influence of its sprin 64. A handwheel 65 is also mounted on theplaten 21, so that the same may be turned forward or backward, as desired, for the purpose of spacing, making corrections, or any other reasons. Any other suitable devices may be used in connection with the recorder-platen carriage, such aspaper guides, rollers, and other attachments common to theordinary Other means may be used for line-spacing and for shifting the platen, if desired.
T he totaling or registering system Each of the key-bars 2 excepting the-zero-key bar is provided with a cam-surface 66, facing toward the rear of the machine and each enaging an antifiiction-roller 67 on shuttleiars 68. Shuttle-bars 68 are commensurate in number with the longitudinal rows of keysthat is, one shuttle-bar 68 for the hundreds-column, one for the tens-column, one for the units-column, and so on. Each shuttle-bar 68 is supported by a pair of rock-arms 69 7 O, the rock-arm 69 bein loosely mounted on a shaft 71 at the front 0 the machine, the rock-arm being mounted on a shaft 72 in the rear portion of the casing. vMounted at the upper end of each rock-arm 70 is a subtracting-pawl 73 and an addin -pawl 74, connected by a spring 75 and sli ing in a bifurcated rock-arm '7 6, having a notch 78 in one fork thereof to receive the adding-pawl 74v and a notch 77 in the other fork thereof to receive the subtracting-pawl 73. Rock-arm '76 is rigidly mounted upon a shaft 79, suitably mounted in and extending transverse the casing. Mounted on a shaft 80, extendin transverse the machine, are a series of co lars 81 equal in number to the number of longitudinal'rows of keys employed. Rigidly mounted on or integral witheach collar are a pair of ratchet-wheels 82 83. The teeth of the ratchet-wheels 82 83 project in The teeth of the ratchetwhe'el 82 are adapted to be'e'n a ed by the adding-pawl 74, and the teeth of t e ratchet- Wheel 83 are adapted to be enga ed-by" the subtracting-pawl 73 in a manner hereinafter described. Each collar 81has also mounted rigidly thereon a transmittingwheel 84, having a crown-gear 85 meshing with a pinion 86 on a shaft 87. of a register-dial 88. The number of register-dials 88 also corre sponds withthe number of longitudinal rows of keys.
89 isa shift handle or lever suitably pivoted to the machine-casing and pivotally corinected at 90 at its lower end to a bar 91, ex-
engagement with their rearward through rule in the use of tending 'rearwardly in the casin and a rockarm 92, ri idly mounted on t e rock-shaft 79. The t rust of the handle or lever 89 in the direction of the arrow, Fig. 2, throu h the bar 91 and rock-arm 92, rocks the roc shaft 79, elevating the bifurcated rock-arm 76 and raising the pawls 73 74, which are held toward each other by the springs 75, and throwing the subtracting-pawl 73 into the path of engagement with the teeth on the ratchet-wheel 83; The movement ofthe handle or lever 89 to the limit of its throw in the opposite direction will lower the bifur-. cated rock-arm 76 to bring the adding-pawl into engagement with the teeth of the ratchet-, wheel 82. The movement of the handle or lever 89 to the central or vertical position holds both of thepawls out of the path of respective ratchetwheels. The bifurcated rook-arm 76 therefore operates as a governor to the register mechanism.
Upon the depression of a key 3 the shuttlebar 68 will be forced toward the rear of the machine a distance depending upon the value of the key depressed, ,forcing the rock-arm 70 to the rear and carrying the'pawls 73 74 guide-notches 77 78 respectively.
For preventing overmotion of the shuttle- 5 bars 68 I provide stop pins or projections 2' on each of the key-bars 2, which are in line with and are adapted to engage a series of notches 68 in shuttle-bars 68 u on the keybarsreaching the limit of their dbpression.
The register indicates the result after a series of operations, whether of addition or subtraction, of all or certain of the numbers recorded 011 the recorder; but as a general the machine the register r05 will show the sum of all the numbers recorded. If it is desired'to transfer this result, Whether it be the sum or the remainder of an addition or subtraction, to the bottom of the column of figures recorded on therecorder IIc without adding or subtracting this result to or from itself onthe register, the handle 89 is movedto its central or vertical position, as shown in Fi 2, in which case both pawls 7 3 and.74 are eld out of the path of en ager1 ment-With their respective ratchet-whee s, so that by the depression of a key, although displacing the shuttle-bar 68 and movingits rockarm 70, no motion will be communicated to the total-dial 88, controlled by the operation r20 of the key depressed,'owing to the fact that the actuating-pawls fail to engage the teeth of their respective ratchet wheels. Such arrangement therefore makes it possible to recor a series of numbers on the platen'and 12 5 then record the result without alterin changing the statement on the total-dia s.'
The cmrging mechanism.In order to perform the adding or subtracting operation necessary in machines of this character, I
have provided a very sim le mechanism consisting in a rock-arm 94, oosely mounted on theshaft 79, carrying at its outer end a pin 95, upon which is pivotally mounted a hnk 96, connected directly to one of the rock-arms 70. Each of the rock-arms 70 is thus connected to the shaft 7 9. On the pin is an antifriotion-roller 97, adapted to engage any one of the five cam projections 98 on the next adjacent transmitting-wheel 84 of lower dcnomination. For the purpose of clearness the transmittin -wheel 84 may be described as being divide( into five segments, each seg ment including a sufficient number of teeth of the crown-gear 85 to rotate the pinion 86 one revolution, each of such segments being provided with one of the cam projections '98.
From the foregoing it will be seen that upon a complete revolution of one of the register-dials of lower denomination the antifriction-roller 97 in line with the transmit tingwheel 84, connected to such dial, will be displaced by engagement with one of the five projections 98 .on such transmitting-wheel, drawing the link 96, by means of the pin 95, to the rear, ulling the rock-arm'70 of the next higher enommation to the rear a distance sufficient to move the adding-pinion or v the subtracting-pinion, depending upon which 'riphery of the wheel.
pawl is in the path of engagement with its pinion, a distance equal to one tooth, thereby increasing or decreasing, such as the case maybe the value of the number on the register-dial of such higher denomination.
The movement of each of the transmitting- 1 wheels 84 is governed or. controlled by a spring'99, engaginga groove 100 in the pee Springs 99 may be mounted in any'suitable manner such, for instance, as on the bar 101, suitably supported in the machine. 7 i
The zero-return mechanism.For the purpose of returning the'dials to their zero positions the following mechanism is provided: A shaft 102, extending transversely in the machine-casing, at the forward end thereof,
has loosely mounted thereon a series of sleeves 1.03, provided with downwardlyprojccting fingers 104, engaging pins 105 on the shuttle-bars 68. The number of sleeves 103 1 is equal to the number of longitudinal rows of keys and to the number of shuttle-bars 68,
there being one sleeve 103 for each shuttlebar 68. Mounted rigidly on the shaft 102, adjacent each sleeve 103, is a collar 106, having a finger or projection'held normally'in engagement with the notched. end of the sleeve 103 by a spring 107, secured at one end to-the said sleeve and at the other end to the said collar.
108 is an operating-handle mounted. rigon the shaft 1.02 and adapted to rock idly said shaft when actuated. A forward pull of the operating-handle 108 will partially rotate each of the collars 106, which through shuttle-bars is obstructed.
their zero positions,
springs 107 will communicate motion to the sleeves 103, forcing the shuttle-bars 68 to the rear until further movement of the said of s'ullicient strength, therefore, to move. shuttle-bars 68 until the latter are obstructed. Inasmuch as the shuttle-bars 68 will not. all. be obstructed at one and the same time, it becomes necessary toprovide the flexible connection between each of the sleeves 103 and the shaft 102. Upon obstruction of a shuttle-bar 68 rotation of the sleeve 1.03, connected to such shuttle-bar,
will be stopped and further movement of the handle or lever 108 will then be in opposition to the spring 107, connected to the particu lar sleeve 103 dogged. As has already been described, the rearward movement of any one of the shuttle-bars arm to the rear, feeding either theadding -or subtracting gear-wheel or neither, depending upon whether the adding or subtracting pawl is in the path of engagement witnits gear-wheel or whether both are .held out'of the path of engagement. When it is desired to return all of the register-dials to their zero Springs 107 are 68 forces the rockpositions, the adding-pawls 74, through operat'ion of the lever 89, are lowered into the path of engagement with their respective gearrwheels The handle 1.08 is then drawn forward, throwing all of the shuttlevbars 68 to the rear and feeding each of the dials 88 around until they are stopped at as hereinafter described. Forstopping the dials88 in their zero positions or for preventing overmotion of the same a dog-plate 110 for each of the transmitting-wheels 84 is rigidly mounted upon a shaft 109, extending transverse the machine beneath. the said transmitting-- wheels. 'Dog-plates 1.10 will normally be in inoperative position beneath the transmittingheel 84 and are adapted to bethrown into operative position through partial rotation of the shaft 109-by a link 11 1, connected by a bar 112 and a link 1.13 to the shaft 102. Projecting from the side of eachof the transmitting-wheels 84 are five stop-pins 114, corresponding in positions to the cam projections 98 on the periphery of the said wheels. When the handle 108 is pulled forward and the shaft 102 partially rotated to throw back all of the shuttle-bars 68, the link 113, com-.
ting-wheel upon which the said stop- 'n is located Will rest in its zero position. I I will therefore be obvious that the bringing of each of the transmitting-wheels to a position wherein one of its sto -pins 114 rests against a stop-plate 110 will ring all of the dials to register zero.
As shown in Fig. 2, thedials 88 are arranged on an angle facing the operator, being covered by a raised portion of the casing 1, provided with sight-openings 115. In order to make thedials 88 of suitable size, the same gay be shingled or overlapped, as shown in I do not wish to be understood aslimiting myself to the exact details of structure herein shown and described,.inasmuch as the same may be varied Without departing from the spirit of my invention.
Having thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:
1. In a machine of the character described, the combination with a record printing platen, of means for moving said latn variable longitudinal distances to right or left of a constant normal position to predetermined positions.
2.'In a machine of the character described, the combination with a movable record-printing platen, of means for moving said platen variable longitudinal distances to predetermined positions, and means for automatically returning the platen to its initial position.
3. In a machine of the character described, the combination with the key mechanism,the
register mechanism actuated thereby, and a series of type-carriers actuated by said ke mechanism, of a record-printing platen a justable on either side of acentral normal position, and cam means for throwing" said platen to its adjusted osition. 4. In a machine of t e character described, the combination with the key mechanism,the register mechanism actuated thereby and the tv e-carriers actuated thereby, of an adjustabl e platen resting normally ma central position, cam means for adjusting said platen to either the right or left of said normal position, and means for returning said platen to its normal position.
5. In a machine of the character described,- the combination with the key mechanism,the register mechanism actuated thereby and the type-carriers actuated thereby, of an ad justable platen resting normally 1n a'central osition, an adjustable shuttle-bar, suitable ever connection between the shuttle-bar and the platen, and cam means actuated by the key mechanism for adjusting said shuttle-bar.
6. In a machine of the character described, the combination with the key mechanism and the register mechanism actuated thereby, of a platen-carriage frame, the platenby, and a platen carriage slidably mounted thereon, a lever connected to said carriage, an' adjustable shuttle-bar connected to said lever, means actuated by the key mechanism for adjusting said shuttle-bar to selected positions, and springressed arms bearing against said lever an adapted to hold the same normally in central position.
7. In a machine of the character described, the combination with the key mechanism and the register mechanism actuated thereby, of a jointed platen carriage frame, a hinged platen carriage slidably mounted thereon, means for holding said carriage in a central normal position, and means actuated by said key mechanism for adjusting said carria e to either right or left of said central norma position to determine the denominational value of characters rinted thereon.
8. In a machine of the cliaracter described, the combination with the key mechanism,the register mechanism actuated thereb an adjustable platen, means for holding said laten normally in central position, a shuttlear,lever means connecting said platen and shuttle-bar, a series of shuttle-bars operatively connected to the keymechanism having camfaces adapted to engage the first-mentioned shuttle-bar to force the platen to either right or left of its central position. 4
9. In a machine of the character described, the combination with longitudinal rows of keys, the register mechanism actuated thereadjustab'le to either right or left of a central normal osition, of a shuttlebar for each longitudina row of keys, suitable cam connection between the longitudinal rows of keys and their respective shuttle-bars, and suitable connection between the shuttlebars and the platen to adjust the latter to a position either right or left of its central normal position depending upon the shuttle-bar actuated.
10. In a machine of the character described, the combination with a series of longitudinal rows of keys having different denominational values, an adjustable platen held normally in a central position, of a series of shuttle-bars of different denominational values one for each longitudinal row of keys, suitable cam connection between the rows of keys and theirrespective shuttle-bars. a laterally-adjustable shuttle-bar having pr0jections thereon mounted in the path of the cam-- faces of the said series of shuttle-bars, and suitable connection between the said lateral shuttle-bar and the said platen to communicate motion to the latter, upon actuation of the former by any one of the series ofdenominational shuttle-bars.
11. In a machine of the character described, the combination with the key mechanism, of a register 'diaI, a transmitting-wheel geared to said dial, reversed ratchet-wheels operatively connected to said transmittingres wheel, an adding-pawl adapted to engage one of said ratchet-wheels, a subtracting-pawl adapted to engage the other of said ratchettive ratchet-wheel.
12. In a machineof the character de-:
scribed, the combination with the key mechanism, of a register dial, a transmitting Wheel geared to said dial and suitably mounted in the machine-casing, an adding ratchetwheel connected to said transmitting-wheel,
a subtracting ratchet-wheel also connected to said transmitting-wheel, pawls for engaging the respective ratchet-Wheels, suitable connection between the key. mechanism and said pawls to actuate the latter simultaneously with the former, and a governor adapt ed to guide either of the pawls into engagement or hold both out of the path of engagement.
13. In a machine of the character described, the combination with the key mechanism, ofthe register-dials, the transmitting wheels geared thereto and having cam projections, the ratchet-wheels operatively con nected to each of the transmitting-wheels,
the pawls adapted to be projected into the,
path of their respective ratchet-wheels, the
, connection between the key mechanism and the said pawls, the antifriction-wheel in the path of and adapted to engage, the cam proections on a transmitting-wheel of lower de- I tween said transmitting-wheel and said shut-.
nomination, the connection between the antifriction-wheel and the pawls of the transmitting-wheel of next higher denomination, andthe means for throwing either of the said pawls into the path of engagement with their respective ratc et-wheels.
' 14. In a machine of the character described, the combination with the dial, the transmitting-wheel geared thereto, the shuttle-bar adapted to be actuated by depression of the keys, pawl-and-ratchet connection betle-bar, the projections on the transmitting- Wheel, the stop-plate adapted to be thrown into the ath of said projections, and the means in ependent of the keys for throwing said stop-plates into the path of the projections and actuating said shuttle-bar.
15. In a machine of the character described, the combination with the dial, the transmitting-whee1 geared thereto and having projections thereon, the longitudinal row of. keys having graduated cainfaces, the shuttle-bar engaging and adapted to be ac' tuated by said cam-faces, pawl-and-ratchet I mechanism adapted to actuate the transmitting-wheel and connected to said shuttlebar, the stop-plate adapted to be thrown into the path of the projections on the transmitanism, the register mechanism actuated thereby, of a record-printing platen adjustable to either side ofa normal central position, means for adjusting said platen by direct action of said key mechanism, and
means for. printing a record upon said platen.
17-. In a machine of the, character. described, the combination with the key mechanism, the register mechanism, the recordprinting mechanism comprising the recordprinting platen, and the platen-shift mechanism, of intermediate mechanism actuated directlyby the action of the key, mechanism to actuate said register, printing and platen shift mechanisms simultaneously with the actuation of said key mechanism.
18. In a machine of .the character described, the combination'with the key mechanism, the register mechanism, the recordprinting mechanism comprising the recordprinting platen,-and the plateneshift mechanism, of intermediate mechanism actuated directly by the action of the key mechanism to actuate said register, printing and platen shiftmechanisms actuated simultaneously, and at one operation with the actuation of said key mechanism. 1
19. In a machine of the character described, the combination with the key mechanism and the indicators, of a pair of pawls for each of said indicators operated by said. key mechanism to operate said mdicators 1n either'direction and means for moving either of said pawls into operative engagement, or
engagement. 1
20. In a machine of the character described, the combination with the key mechanism and the indicators, of a pair of pawls for each of said indicators operated. by said key mechanism to operate said indicators in either direction, shuttle-bars actuated by said key mechanism for operating said pawls for-holding both of said pawls out of operative and means for moving either of said pawls into operative engagement.
21. In a machine of the character described, the combination with the key mechanism and the indicators, of a rock-arm for. each of said indicators, duplicate pawls mounted on each of said rock-arms, shuttlebars actuated by said key mechanism for operating said rock-arms and means for moving either of said duplicate pawls into operative -,12 5
engagement to determine the direction of movement of an indicator;
22. In a machine ofthe character described, the combination with the ke mesh anism and the indicators, of-addition and subtraction pawls for operating said indicators, shuttle-bars for operating said pawls indicators, shuttle-bars for operating said p'awls and operated by said key mechanism, means for moving either the addition or the subtraction pawl into or out of operative engagement, and carrying mechanism for transferring items from one indicator to the indicator of next higher denomination.
24. In a machine of the character described, the combination with the key mechanism and the indicators, of transmittingwheels for operating said indicators, 11 pair of pawls for each of said wheels for operating each of said wheels in either direction and operated by said key mechanism, and a series of devices independent-of said key mechanisrnoperated by transmitting-wheels of lower denomination for operating the pawls of transmitting-wheels of next higher denomination.
25. In a machine. of the character described, the combination with the key mechanism and the indicators, of transmittingwheels for operating said indicators, a pair of pawls for each of said indicators for operating each of said indicators in either of two d irections andoperated by said key mechanism, a series of devices independent of said key mechanism operated by transmittingwheels of lower denomination for operating pawls of next higher demnnination, and means for moving either pawl of the respective pairs of pawls into or out e' operative engagement.
26. In a machine of the character described, the combination with indicators'and transmitting-wheels for driving said indicaters, of pawls for driving said transmittingwhecls and key mechanism for operating said pawls, and means independent of said kc mechanism operated periodically by transmi.ttingwheels ol" lower denomination for operating the key-actuated pawls of indi-- cators ol" the next higher denomination.
27. In a machine of the character described, the combination with the key mechanism and the indicators, oikey-operated pawls for driving said indicators aml means independent of said key mechanism for operating key-actuated pawl ol'highcr denomination at delimte periods m the movement of indicators of lower denomination.
anism and the' indicators, of key-operated pawls for driving said indicators, means inoperative endependent oi said keymechanism for operating a pawl of higher denomination at definite periods in the movement of an indicator of next lower denomination, and means for moving said pawls into or out of operative engagement.
29. In a machine of the character described, the combination with the key mechanism and the-indicators, of transmittingwheels for driving said indicators, of addition and subtraction pawls for driving each of said transmitting-wheels and operated by said key mechanism, and means for moving either of said pawls into or out of operative engagement or holding both of said pawls out of operativeengagement.
3O. In a machine of the character described, the eombination with an adjustable record-printing platen and record-printing devices, of means for moving saidv platen from a normal position for a printing impression,'means for automatically returning said platen to normal position after said impression, a ratchet-wheel on said platen, a pawl for actuating said ratchet and a key-actuated lever for actuating said pawl.
31. In a machine of the character described, the combination with an adjustable record-printing platen and record-printing devices, of means for moving said platen longitudinally from a normal positionfor a printing impression, means for automatically re turning said platen to normal position after said impression and key-actuated line-spae ing mechanism.
32. In a machine of the character described, the combination with a record-printregister mechanism, ol a platen, means for variably adjusting the platen to predetermined printing positions and means for automatically returning said platen to normal position after each printing impression.v
3-1. In a machine of the character described, the 'eombimltion with the key mechanism and the indicators, of transmittingwheels for actuating said indicators, a pawl l'or eachoi said wheels for actuating the same, means operated by the key mechanism ioroperating said pawls, projections in zero positions on said wheels, stop devices adapted to be thrown into the path of said projections, ilcxible incansi'or o )erating said pawls simultaneously to variab eextcnts to throw the projections against the stopdevices and means for throwiinz the stop devices into-the paths of the projections.
or actuating each ratchet-wheel and engag ing diametrically opposite points of said wheels, flexible means for drawing said'pawls toward each other and a forked rocking govern'or adapted when in central position to 10 hold both of the pawls out of operative engagement and when in either of its extreme positions to hold but one of said pawls out of.
operative position.
' LUOIEN S. CRANDALL. Witnesses HENRY E. MATJEN, MABEL F. GLADDING.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2638271A (en) * 1953-05-12 Duplex calculating machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2638271A (en) * 1953-05-12 Duplex calculating machine

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