US1688939A - Cash register - Google Patents

Description

Uct. 23, [928.

L. C. OSTENDORF CASH REGISTER Filed April 25, 1924 5 Sheets-Sheet 1 3mm Lawrence C. Oslendorf L. C. OSTENDORF CASH REGISTER Filed April 23, 1924 a Shets-Sheet 2 3mm 55 Lawrence C. Oatendorf By Oct. 23, 1928. 1,688,939

L. c. OSTENDORF CASH REGISTER Filed April; 23, 1924 3 Sheets-Sheet 3 v 3mm Lawrence C. Os tendorf in. W

Patented Get. 23, 1923.

UNITED; STATES PATENT OFFICE.

LAWRENCE c. OSTENDORF, or DAYTON, OHIO, AssreNon, BY MESNE ASSIGNMENTS, 'ro THE NATIONAL CASH nnersrnn COMPANY, DAYTON, OHIO, A ooaronamron F MARYLAND.

CASH REGISTER.

Application filed April 23, 182.4.

This invention relates to cash registers, and mute particularly to cash registers of the type described in the patent to Ketteringand Chryst, No. 1,137,061, issued April 2'1,

3 1915, and patent to VJ. A. Chryst, No.

1,140,443, issued May 25, 1915 to which reference may be had for a complete description of such parts ofthe machine as do not relate directly to the present invention.

One of the objects of the invention is to nrovide means for positively returning the totalizer reset key to home position so that it can not be held in operated position to cause injury to parts of the mechanism.

Another object is to compel a complete operation of the machine before the cash drawer can be returned to home position after it has been released by the drawer catch.

Another object is to provide means whereby the printing mechanism can not be manipulated to prevent the printing of the proper record.

Still another object is to provide means whereby the record strip receiving roll can not be operated at the time the printing impression platen is operated to make the record.

.Vith theseand incidental objects in view, the invention consists of certain novel features of construction and combinations of parts. the essential elements of which are set forth in appended claims and preferred term or embodiment of which is hereinafter described with reference to the drawings which accompany and form part of this specification.

Of said drawings:

Fig. 1 is a right side elevation, with the cash drawer shown in section.

2 is a transverse vertical section of the machine, taken inside the right hand side frame.

Fig. 3 is a detail view of the key release mechanism in partially operated position.

4 is a right hand view of the printing u'iechanism.

5 is a left hand view of a portion of the mechanism shown in Fig. 4-.

Fig. 6 is a detail view of a key bank, together with the totalizer reset key.

The machines illustrated in the above mentioned patents are of the drawer-oper- Serial No. 708,465.

ated type, that is, the energy for driving the mechanism during the opening movement of the drawer is stored up by the closmg movement of the cash drawer. The drawer is normally spring-pressed outward. but restrained from such movement by a latch which is freed by the depression of a release bar. The drawer then opens under the action of the spring, and is returned by hand to its closed position. Upon the re turn movement of the drawer, the amount, clerks initial, transaction character, etc, set up on the keyboard are recorded on a record strip.

Referring to the drawings, only so much of the mechanism is shown as necessary to clearly illustrate the improvement, the complete mechanism being shown in the Kettering and Chryst patent previously referred to.

The machine is operated in the usual manner by depressing the proper keys represent ing the transaction, after which a release bar Fig. 1) is operated. to release the cash drawer 31 and cause the operation of the machine. The release l ar 30 is secured to a forked stem 32, suspended by links 33 and 34: pivotally supported on the adjacent side frame 35. This release bar 30 is retained in normal outward. position by a restoring spring 36. A pin 3'? mounted in a bell crank lever 38 pivoted at 39 is held in engagement with the fork of the stem 32 by spring 40 interior to the restoring spring 36 and stretched between the pin 37 and a pin in the plate 32. This causes the bell crank lever 38 to move when the release bar 30 is operated. The lower arm of the bell crank lever 38 is formed with two notches ll and 42, which are engaged by a roller 43 on a transversely extending rod carried by arms 44 and pinned on a cross shaft 45 (Figs. 1 and A link 51 connects the arm 5O witha drawer latch 52 pivoted at 53 to the frame of the machine. The lower end of the drawer latch 52 is bifurcated to receive a rolle 5d carried in the usual bracket mounted on the rear end of the cash drawer. The roller 43 engages the notch L1, as shown in Fig. 1, to hold the latch in the position shown in Fig. 2, there by holding the drawer closed against the tension of the usual drawer-opening mechanism hereinafter set forth. When the releasebar 80 is pushed inwardly the bell crank 38 rocks clockwise due to its spring'slO and frees the roller 48 from the notch %1, thereby permitting the drawer latch 52 to swing and the drawer to open. The drawer latch 52 is held in its rocked position by a spring 49 stretched between the link 51 and a member rigid with the left side frame.

When the drawer latch 52 is freed to move clockwise, a pair of drawer-operating arms 55, (Fig. 1), mounted on studs 56 on opposite sides of the machine, one arm being shown in Fig. 1, are swung clockwise to move the cash drawer forward. These arms are actuated by a spring 57 (Fig. 4) through connections to be presently described, attached to the frame of the machine and to an arm 58 pivoted on a cross rod 59 supported in the side frames. The arm 58 is connected by a link to a bell crank lever 66 pinned to a cross shaft 67. As only the right hand arm 55 (Fig. 1) and its associate parts are shown, the description will refer to such parts. Pinned to the cross sl aft 67 (Fig. 2) is an arm 68 connected by a link 69 and stud 70 to the drawer-opcrating arm 55 (Fig. 1), through which connecting means, the spring 57 operates the draweroperating arms clockwise. The lower end of the drawer-operating arm 55 carries a roller 71 which rides on a block 72 secured to the cash drawer 31. Also fast on the lower end of the drawer-operating arm 55 is a spring-actuated full-stroke pawl 7 3 which cooperates with notches in a stationary rack plate 7 4 to compel the draweroperating arms to be rocked forward the proper distance before the cash drawer can be returned to its normal position.

The drawer-operating arms 55 constitute means for driving the machine, as well as means for storing up energy in the spring 57, when they are moved counter-clockwise by the closing movement of the cash drawer, as is fully explained in the patent previously referred to.

In spring-operated mechanisms of the type disclosed herein, it is possible, through improper manipulation, to release the cash drawer by the operation of the release bar 30 and at the same time, prevent the proper operation of other parts of the mechanism, and to again return the cash drawer to normal position without making the proper records. This improper manipulation may consist in temporarily holding the drawer 31 against release, while the release bar 30 is depressed, and then permitting the drawer to move out until the drawer roller 54 is free of the drawer latch 52. Then, by holding the recording platen, (Fig. 5, to be later described), the recording mechanism can be held against operation and the cash drawer can be manually pulled out of the machine and then pushed back again without causing a record to be made.

To prevent such improper manipulation, a square pin 75 (Fig. 2) mounted on the link 51 is provided, to engage a notch 76 formed in the rear arm of a spring-actuated locking lever 77, pivoted on the shaft 67, when the drawer latch 52 rocks to release the drawer. The s12 ring=actuated lever 77 retains the drawer latch 52 in its operated position, to prevent closing of the cash drawer until the spring-actuated locking lever 77 is moved COllIltQT-ClOClWiSQ after the operation of the recording mechahism. A spring 78 attached to the locking lever 77 and to a latching arm 79, normally holds the locking lever 77 in engagement with the pin 7 5. The forwardly extending arm 80 of the locking lever 77 is rocked counterclockwise by a cross rod 81 to disengage the notch 76 from the pin 75 so that the drawer latch 52 may be returned to its normal position at the proper time. The release rod 81 constitutes a restoring means for returning the toothed segments or totalizer actuators 98 to home position, as will be set forth later.

.he release rod 81 is supported by a pair of angular arms 82, only one of which is shown, pivoted on studs 83 supported in the respective side frames. The rod 81 and arms 82 form a rocking frame oscillated by a pair of cam plates 84, only one of which is shown, pinned to the rod 67. Each cam plate has a formed slot 85 which engages a roller 86 carried by the corresponding arm 82. As the arm 82 mov s couliter-clockwise, the rod 81 rent-acts the end 80 of the look ing lever 77 and rocks this lever in a sin1ilar direction. A pin 87 mounted in the rear arm of the locking lever 77 is thus elevated above a shoulder 88 formed on the latching arm 79 to permit the spring 78, to rock the arm 79 counter-clockwise and interpose the shoulder 88 beneath the stud 87 to retain the lever 77 in its operated position. When the lever 77 is thus latched, the notch 76 is disengaged from the square pin 75 t .ereby permitting the drawer latch 52 to be returned to its normal position by the closing movement of the cash drawer. As the drawer latch 52 is returned in countercloclnvise direction to its normal position, it shifts the link 51 to the left, which causes the square pin 75 to contact the lower end of the latching arm 79 and rock it clockwise on its pivot 89, to disengage the latching lever 75 from the pin 87 and permit the looking lever 77 to return to its normal position.

The totalizer (Fig. 2), which is normally engaged with its actuating segment 96, is disengaged from these segments at the be ginning of the operation of the machine; As the drawer-operating arms 55 (Fig. 1) swing forward, a dog 97, (Fig. 1), pivoted on the lllfi right-hand arm wipes a roller 98 carried on a bell crank lever 99 to rock said lever counter-clockwise on its pivot 100. A link 101 connects thehell crank lever 99 with another bell crank lever 102 to cause these two levers to move in unison. Also pivoted to the lever 102 is a pitman 193, the upper end of which is bifi'ircated, each bifurcation having a pinlO-il and 105 to engage the re stricted portions of openings 106 and 101 formed in oppositely extending arms 108 and 109, respectively, secured to shaft 110, to which the totalizer-supporting arms 111 (Fig. 2) are also secured. As the arm at the beginning of an operation starts forward, rocking the bell crank lever 99 counter-clockwise, the totalizer 95 is disengaged from its actuating segments 96. As the arm 5521pproaches the limit of its forward travel, the dog 97 contacts roller 112 carried on the front bell caink lever 102 to rock this lever clockwise, and through pitman 103, pin 10% and arm 108 to rock the shaft to again engage the totalizer with its actuating segments 96, so that the items represented by the depressed item keys 113,. (Fig. 2) are entered in the totalizer during the return of the cash drawer to normal position.

A spring-tensioned blocking arm 11% (Fig. 1), pivoted on the :tullst-roke rack plate 7 1, prevents the bell crank lever 99 from icing moved counter-clockwise by the dog 97 the arm 55 returns to its normal position. A pin 115 on the full-stroke pawl 73 engages the lower edge of the arm 114, as the arms 55 return to normal position. The blocking arm has an upwardly extending-stop 116 lying in the path of the lower end of the bell crank lever 99. As the drawer-operating arms 55 return to their normal positions the pin 115 drags along the bottom edge of the blocking arm 1141 to hold the projection 116 of the arm against the bell crank lever 99 and prevent its rocking as the dog 97 engages the roller 98. The unyielding bell crank 99 causes the dog 97 to swing on its pivot against the tension of a spring 117 until it is free to pass by the roller 98. By this mechanism, the' totalizer 95 is held engaged with the actuators 96 as the parts return to home position.

Each totalizer-actuating segment 96 (Fig. 2') is pivoted on a stud supported in its corresponding key frame in axial alinement with stud 83, and is loosely connected to a toothed. segment 118 pivoted on the same center as the actuator. The segment 118 is moved counter-clockwise by a spring '90 until its movement is intercepted by the inner end of a depressed key and, if no key is depressed, it will be moved one space only, when it will be arrested by a Zero stop lever 119 (Fig. 6), all of which is fully described in the patent to Kettering and Chryst above referred to.

When a. key 113 6) is depressed, it

is held in its depressed position hy a detent plate supported by the usual links 126 and 12'. pivoted on the key frame. This detent plate 125 has laterally projecting pins 128 adapted to engage notches 129 formed in the keys 113 to retain them in depressed position. Near the end of the operation of the machine, the detent plate 125 is moved downwardly to disengage the notch 129 from the pm 128 to permit a spring 130 to return the key to its normal position.

The detent plate is operated to release a depressed key by a rocking frame 131 mounted on a release shaft 132. A link 133 (Figs. 1 and 3) connects the rocking frame 3 131 with a lever 13 1 pivoted at The upper end of this lever carries a roller 136 which contacts a cam plate 137 pivoted on one of the drawer operating arms 55. In normal position, the cam plate: .137 is above the roller 136, as shown in 1, in which position it is held in contact with the roller by a spring 138. As the cash orawer 31 moves forward and the d1awer-operating arm 55 swings clockwise, the cam plate 13'!" passes by the roller 136, on] accountof its flexible construction. As the dra er-operating arm 55 is returning to normal position, the cam plate 137 contacts the under side of the roller counter-clockwise to rock the key release frame 131 in a like direction to lower the detent plate 125 and release the depressed key or keys 113.

When the totaliz'er 95 is being Zero, it is important that the item l be locked against manipulation. complished by having a manipulative reset key 139 (Figs. 2, 3 and 6) pinned to the release shaft 132, to which are also pinned two arms 140 supp: ting a universa rod 141 which extends across the plur llty of key hanks. As the resetkey 139 moved clockwise, the universal. rod 1 11 is elevated into the plane of a projection 14:2 6) of the link 126, to hold the detent plate 'aised, and thus lock the keys 113 against manipulation. Referring to Fig. 3, in which the reset key is shown in its operated position and the key release m-chanism 131 in a position about to be operated, it can be seen that sufficient force might be applied to the cash drawer 31 to strain or break ihe parts 0 aerated by the cam plate 137.

In order to prevent such a condition, mechanism is provided for positively returning the reset key 139 to its normal position durin the operation of the machine, and to prevent the operation of this key 139 at the time the item key releasing meelh anism functions. This mechanisn' comprises a flexible cam plate on the cross rod 81 (Fig. 2), held in normal posi on with its shoulder 152 in contact with a pin 153 supported in the angular arm 82, by a 139 and moves the lever 13% spring 151. The cam plate 150 has a high point 154i adapted to engage a curved edge on the lower arm of a lever 156 pivoted at 157 on the tr; me member 35. The 1: arm of the lever 150 engages the universal rod 141 opera ted by the reset key 139. This lever 150 is normally held in engagen'ient with them iversal red 1 11 by spring 158. During the first part ot the operation of the machine, the angular arms 82 are moved counter-cloclnvise, arising the am plate to rock slightly clock vise on the cross rod 81, as the hi i point 151 passes ever the curved edge 1;

5 of the lever 156. On the return of the angular arms 82 to their normal positions, the cam plate 150 will not yield, and the 11': point engages the curved edge 155, rocking the lever cloc wise and returning the universal rod 1 and the reset key 139 to their norn'ial no. tions, as shown in Figs. 2 and 6.

When the reset key 12-39 is moved from i home p sition, it operates through release shaft 132, arm 161 1) last thereon, and link 160, to swing a2 arm 150 (Fig. 1) pivoted at 14.9, into position to arrest 1h; pin 3? on the restraining hell crank to prevent the release of the wcr 31 when the release bar is operated. elongated slot 103 in the lower end of link permits the reset key to home position prior to the return of J1 release bar 80 to normal position.

In a machine of this type it is necessary to make an extra or idle operation before operating the reset key for a reset operation,

s is fully described in the patent to Kettering and Chr t above referred to. frevious to this extra operation, the reset key 139 is locked against operation by a roller 16-1 1) ei'igaging shoulder 105 formed in the rm 161. During this extra operation of the machine, a shaft 166 is rocked counter-clockwise, by the indicator segments (not shown here, but illustrated and described in the Kettering and Chryst patent previously referred to) which moves the roller 16-1 out of engagement with the shoulder enabling a clockwise movement ot the arm 161. As the arm 161 moves clockwise by the operation of the reset key, a roller 10? carried on the upper end of the arm will move into notch 108 formed in a lever 1 0 pivoted. on a stud 170' and held in e agemcn w th the roller 10? by a spring llhe clockwise movement 01. the a1 will engage the lower edge ot the arm i the roller 16 1 and cause the arm to move countercloclnvise and, through the link 173, move the link 103 clockwise on its p t 50 to disengage the pin 10% from the l 100, so that the machine starts on aeration the totalizer 95 will not be dis engaged from the actuator. The pin 105 on the opposite arm of the pitman 103 Will to. The return of the drawer-operating arms to their normal positions, at this time, will engage a hy-pass arm 17-1 mounted on the upper end of the arm 55, with a roller carried on the lever 109 to move the lever 169 couliter-clockwise and disengage the roller 10? on the arm 101 from the notch in the lever 100, permitting the shaft 1.32 to return to its normal. position under the influence ot the spring 158 and lever 156.

The printing mechanism, (Fig. 4;), which is of the oscillating writing table type, is pivoted upon stud 105 supported by the side frame of the machine. The shaft (37, which is rocked by the driving mechanism of he machine, is connected by the bell crank .ever 00 and a link 1536 to one arm of a driv ever 187 pivoted on the stud 185, the )esite arm of which lever has an elongated 1 threugh which extends a screw stud t toned the main :traine 190 of the The slotted arm of the lever 18'? ted by a toggle link 191 to an arm s. 1 and which is pivoted on a 23 mounted in the printer frame 190.

('i F stud 19 nocted at its free end by an eccentric adjusting means to the tree end of the arm 192. The arm 192 carries a roller 208 which normall travels along the under side of a rigid guide plate 196: to cause the driving lever 187 to move the printer frame 190 through the link 191.

lhe key 30, when depressed, operates to eleasc the latch 52 (Fi g. from the drawer I 1, whereupon the heavy springs 57 (Fig. 1) per-ate through arms 58, links 65, bell cranks $6, main drive shaft {37, arns 68, (Fig. 2), a (1 links to rock the driving arms 1) in clockwise direction to open the drawer.

Rotation of the main drive shaft 67 (Fig. and l ell cranks 06 drives the link 1% to the loft (Fig. 1) to rock the drive leve 187 in clockwise direction. By reason of the slot and pin connection 189 between the drive lever 18! and the oscillatory printer frame 190, the pin normally lying at the right-hand end (1h 1;) ot the slot, as well as by reason of the toggle link 191 connecting the lever 161' and the arm 10:2, the lever 1ST drives the printer frame and associated parts in clockwise direction from their initial positions towards the printing position. The roll 100 on one arm of the arresting bell crank 108 rides on the upper edge of the re duced forward end 200 of the guide rail 194, and the roll 208 on the platen arm 192 rides along the under edge of the reduced forward end of the guide rail, against which it is held by the pressure exerted by the driving lever 18'? and toggle link 191 against the platen arm 192.

The guide rail 1941 is provided with this reducedforward end in order to enable the parts to gather momentum and relieve the drive springs 57 of the necessity of overcoming a resistance atthe very outset of their operation, such as is present in the Chryst Patent, No. 1,140,1413, hitherto referred to.

After the printer mechanism has advanced towards its printing position an appreciable distance, the roll 199 on the arresting bell crank 198 strikes the shoulder 18 1 on the guide rail 19 1 at the juncture of the reduced forward end 200 thereof with the body of the guide rail, to arrest the printer mechanism.

The driving lever 187, owing to its pivotal connection through toggle link 191 with the platen arm 192, and to its slot and pin connection 188, 189 with the printer frame 190, continues its clockwise rocking movement, however, and as a result, straightens the toggle link 191 and then swings its lower end towards the right.

As the toggle link 191 is straightened, it rocks the platen arm 192 and platen carrier 203 upwardly about its pivot 193, the roll 208 being carried by the platen arm 192 into a. recess 195 formed in the under edge of the guide rail for this purpose.

its the toggle link swings counter-clockwise. a pin 196 thereon strikes an arm 197 of the arrestim bell crank 198 to rock the roll 199 thereof upwardly over the shoulder 181, and onto the elevated edge 201 of the guide rail, to permit the continued advance of the printer mechanism towards printing position,

One purpose of thus arresting the printer mechanism intermediate its limits of travel to effect the positioning of the relation between the driving lever and toggle link as hereinafter explained.

After the switching of the toggle link 191 counter-clockwise, roll 208 of the platen arm 192 drops out of the recess 195, and the left-hand end (Fig. 4) of the slot 188 lies against the pin 189 of the printer frame 190 to advance the printer mechanism to its printing position. Also, the pin 196 on'the toggle link 191 remains in contact with the depending arm of the arresting bell crank 198 to retain it in elevated position.

As the printer mechanism approaches its printing position, the roll 199 on the arresting bell crank, which is now riding on the high portion of the guide rail 194, wipes the lower edges of two spring-pressed locking pawls 215 and 216 pivoted 011 a suitable stud 217. The lower free ends of the pawls carry projecting fingers normally in contact with a pin 218 which limits the springactuated travel of the pawls. The arresting pawl. 215 is longer than and projects beyond the free end of the safety pawl 216.

In a machine of this type, partially operated by springs, it has heretofore been possible, through mismanipulation, to prevent the making of a record on the paper and thus destroy one of the important safety features of the machine. One such form of mismanipulation consisted in releasing the machine for operation while manually restraining the oscillatory writing table and printer mechanism from moving to its print-. position. The operation of the machine was then controlled by gradually releasing the drawer and juggling the latter as it approached the outer end of its travel, until the full stroke mechanism was reversed, whereupon the drawer could he closed and no record made of theoperation.

To prevent the possibility of such mismanipulation, the safety pawl 216 is provided.

The free end of the pawl 216 is notched as at 219, so that as the printer mechanism with the arresting bell crank 198 approaches the printing position, the roll 199 on the arresting bell'erank will lift both the safety and the stop pawls 216 and 215, respectively, and then, before the printer mechanism arrives in printing position, and also before the full-stroke mechanism (Fig.1) for the cash drawer 31 completes its advance but still locks the drawer against closing, the roll 199 escapes the unnotched edge of the safety pawl 216, whereupon the safety pawl snaps down behind the roll 199 to lock the arresting bell crank, and consequently, the printer mechanism, against being restored to initial position, even though the longer arresting pawl 215 is still idly resting on the roll 199.

The safety pawl 216 when behind the arresting bell crank, enforces the completion of the travel of the printer mechanism to its printing position. Also, the safety pawl prevents the cash drawer from being closed.

Therefore, the driving lever 187 must be permitted to complete its clockwise travel under the influence of the strong springs 57, and in so doing, it rocks the printer mechanism to the limit of its clockwise travel, which is also the printing position. As the printer mechanism arrives at its limit of travel, the roll 199 of the arresting stop escapes past the free ends of the arresting pawl 215, allowing the arresting pawl to also drop behind the roll 199. It will be remembered that the pin 196 on the toggle link 191 is still in contact with the depending arm of the arresting bell crank 198 to hold the latter in elevated position, even though, at the completion of the clockwise travel of the printer mechanism, the bell crank 198 overhangs the reduced rear end 204 of the guide rail 194.

A bumper 206 lying in the path of the printer mechanism, at the rear end of the rail 194, prevents excess travel. of the printer mechanism in clockwise direction, a spring connecting the bumper 206 with a similar bumper 207 located at the opposite lin'iit of travel of the printer mechanism to arrest the printer mechanism in its initial position, all as fully explained in the patent to Chryst, No. 1,140,443, above referred to.

The cash drawer 31 when forced inwardly by the operator in closing the drawer, rocks the arms 55 (Fig. 1) rearvmrdly, and through links 69 (Fig. 2), and arms 68, rocks the main drive shaft 6?" in counterclockwise direction. The shaft 67, through bell cranks 66, (Fig. 4) draws the links 186 to the right in said figure, to rock the driving lever 18? counter-clockwise to return the printer mechanism to its initial position. At the outset of such return, however, the roll 199 on the arresting bell crank 198 strikes the abrupt free end of the stop pawl 215, which arrests the printer mechanism and its associated parts {lgtlIlF-Ztrestoration to their initial positions.

But the drive lever 187 continues its travel counter-clockwise and in so doing, duplicates its action when the printer mechanisn'i is arrested on its clockwise travel, that the lever swings the lower end of the toggle link 191, to first straighten the toggle link. and then switch it back to its original position relatively to the drive lever 187.

As the toggle link 191 straightens, itrocks upwardly the platen. arm 192 together with the platen support 203 to press the platen 202 against the type on the type carrier 220 which has, in the meantime been differentially adjusted relatively to the printing line, according to the key 113 (Fig. 6) de )ressed.

huch upward travel of the platen arm 192 is permitted by forming a recess 205 in the lower edge of the rear end of the guide rail 194 entered by the roll 208 as the platen arm is elevated.

Continued travel of the driving lever 187 counter-clockwise swings the lower end of the toggle link 191 counter-clockwise, there by withdrawing the pin 196 from contact with the depending arm of the arresting bell crank lever 198 to permit a spring (Fig. 4' to rock the bell crank clockwise until the roll 199 thereon contacts the surface 204 of the reduced rear end of the guide rail .194 so as to clear the abrupt rear ends of the arresting and safety pawls 21.5 and 216 respectively.

Owing to the arrest of the printer mechanism, the driving lever 187 rocks relatively thereto to the limit permitted by the slot 188 in the lever until the right-hand end of the slot strikes the pin 189 on the printer frame 190.

Then, as the driving lever 187 proceeds counter-clockwise, in its restoration of the printer mechanism to initial position at the left (Fig. 4), the roll 199 rides up the incline between the low rear end of the guide rail. 194 and the higher portion 201 thereof, and then down the shoulder 184 onto the reduced front end 200 of the guide rail, the guide roll 208 on the platen arm 192 riding past the recess 195 in the lower edge of the rail under the shoulder 184 Without entering the recess.

In its travel up the incline between the lower portion 204 of the guide rail and the higher intermediate portion 201 thereof, the roll 198 idly rocks the arresting and safety pawls 215 and 216 upwardly and then releases them.

In a machine of this type, which is partially operated by spring means, it is possible through manipulation, to hold the oscillating writing table 190 at the beginning of the operation and prevent it from being moved its full extent, to eliminate the operation of the impression platen 202 to print upon the paper as the machine is operated. To overcome such manipulation, there is provided the spring-actuated pawl 216 which is loosely mounted on a pin 217 and normally held in contact with the pin 218 by a spring attached to its upper end. The pawl 216 has a shoulder 219 so located that, as the roller 199 travels past the left hand edges of the pawls 215 and 216, the pawl 216 will be permitted to return to normal position while the roller 199 is still in engagement with the edge of the longer pawl 215. l i ith the shoulder 219 of the pawl 216 behind the roller 199, the driving mechanism of the machine cannot function to return the writing table to its home position unless the writing table is moved to its extreme operated position, Where the roller 199 passes by the end of the longer pawl 215, allowing that pawl to return to its normal. position, as shown in Fig. 4. With the pawl 215 in its normal position and the roller 199 below this pawl, the impression member 202 must be operated before the pawl 18? can return the printer side frame 190.

The type segment 220 is positioned according to the key depressed by mechanism not shown here, but illust 'ated and described in the patents previously referred to. The inking ribbon 221 is fed from one spool to another by any suitable feeding means. The record strip is fed from a supply roll 214 (Fig. 4) to a receiving roll 222 (F ig. 5) by the oscillating movement of the writing table. Secured to the receiving roller 222 is a ratchet wheel 223 (Fig. 4) which is engaged by the upper end of a spring-actuated :teed pawl 224 mounted on the side frame of the machine. As the writing table is moved into operated position and returned, the feed pawl 224 will cause the receiving'roller 222 to move one step of the ratchet wheel. A retaining pawl 225 (Fig. 5) prevents a retrograde movement of the receiving roller 222 as the writing table is moving into operated position. As it is desirable at times to manually operate the receiving roller without operating the machine, a hand wheel 226 is provided. If this hand wheel should be manipulated at the time the printing is taking place, the impressionwould be smeared so that it would not be legible.

Means have been provided to prevent such manipulation This means comprises a downwardly extending projection 220' on the feed pawl 22 i adapted to engage the ratchet wheel 228 and lock this wheel against movement at the time the impression is being made. The feed pawl 22% is operated at this time by a cam 228 conveniently formed on the lever 18?. As the lever 18? moves clockwise 4%), its cam 228 wipes against a pin 229 mounted in the feed pawl 224'. to move the pawl co[inter-clockwise, thereby bringing its lower end 227 into engagement with the ratchet wheel 22?). This prevents operation of the feed roller 222 at the time an impression is taken.

lVhile the form of mechanism herein shown and described is admirably adapted to fulfill the objects primarily stated, it is to be understood that it is not intended to confine the invention to the one form or embodiment herein disclosed, for it issus,-= ceptible of embodiment in various forms all coming within the scope olthe claims which follow.

What is claimed is:

1. In a machine of the class described, the combination. of a pivoted printer member having a home position and an operated position, a driving means, an impression platen arm supported by said printer memher, a type segment adapted to be differentially positioned, a yieldably supported member adapted to cause said impression platen arm to operate and cause an impression to be made from said type segment, and a second yieldably supported member adapted to cause said impression platen arm to operate to make said impression, before said driving means can return said pivoted printer member to home position.

2. In a machine of the class described, the combination of a pivoted printer memher having a home position and an operated position, a driving means, an impression platen arm supported by said printer member, type segment adapted to be dilierentially positioned, a yieldably supported member adapted to cause said impression platen arm to operate and cause an impression to be made from said type segment, and means adapted to cause said impression platen arm to operate to make said. impression, before said driving means can return said pivoted printer member to home position.

3. In a machine or the class described, the combination of a pivotal printer member having a home position. and an operated position, driving means, an impression platen arm supported by said printer member, a type segment adapted to be dilierentially positioned, means adapted to cause said impression platen arm to operate and cause an impression to be made from said type segment, and means adapted to cause said impression platen arm to operate for said impression, before said driving means can return said pivotal printer member to home position.

in a machine of the class described, the combination of a pivoted printer member having a home position and an operated position, a spring-actuated mechanism adapted to move said printer member from home position to operated position, drivmeans, means operated by said driving means for moving said printer member from operated position to home position, a diliterentially positioned type segment, an im ression platen adapted to make an impression from said type segment, and means for preventing the moving of said printer umber from operated position to home osition prior to making an impression.

in a machine of the class described, the combination of a record material supporting frame adapted to be oscillated at each operation of the machine, an impression platen arm supported by said frame, driving one for shi ting the supporting frame, and for operating said impression platen arm, a record material receiving roller, a ratchet wheel connected to said roller, a doubleended pawl cooperating with the rachet wheel, and means controlled by said driving means for disengaging one end of aid pawl from said ratchet wheel and en- ;aging the opposite end with said ratchet .l, to lock said wheel against operation 1n iii ie .t tne time said impression platen arm is bei g operated.

3. In a machine of the class described, the combination of a record material supporting frame adapted to be oscillated at each operation of the machine, it driving means, an impression platen arm supported by said frame, means for operating said impression platen arm, a record material receiving roller, a ratchet wheel secured to said roller, a double ended pawl cooperating therewith, and camming means supported by said driving means tor disengaging one end of said pawl from said ratchet wheel and causing the opposite end to engage said ratchet wheel to lock said wheel against operation at the time said impression platen arm is being operated 7. In a machine of the class described, the combination of a record material supporting frame having a home position and a printing position, means to shift the supporting frame to its printing position and to return it to its home position, a record material receiving roller, a receiving roller driving pawl, manipulative means adapted to operate said receiving roller independentof said driving pawl, and means cooperating with said driving pawl to prevent the operation of said receiving roller by said manipulative means when the supporting frame is in printing position.

8. in a machine of the class described, the combination with a shiftable printer mechanism including an impression n'ieans, the printer mechanism having a home position and a printing position; means to shift the printer mechanism from its home position to its printing position, and to return the printer mechanism from its printing position to its home position; and a type carrier with which the impression means co-acts; of means to prevent the return of the printer mechanism to its home position prior to making an impression.

9. In a machine of the class described, the combination with a type carrier; a printing mechanism shiftable towards anc from its printing position, and incluuing a support, and an impression means mounted on the support and shiftable relatively thereto to effect the imprint of the type upon the paper; and means to shift the printing mechanism towards and from its printing position, and to shift the impression means to effect printing; of a guide for the impression means; a shiftable stop carried by the printing mechanism, and riding on the guide; yieldable means to take behind the stop after the arrival of the printing mechanism in its printing position; and a second yie-ldable means to take behind the stop and prevent the return of the printing mechanism before it arrives in its printing position.

10. In a machine of the class described, the

combination with a type carrier; a printing mechanism shift-able towards and from its printing position, and including a support, and an impression means mounted on the support and shiftable relatively thereto to eii'ect the imprint of the type upon the paper; and means to shift the printing mechanism towards and from its printing position, and to shift the impression means to effect printing; of a guide for the impression means; a shiftable stop carried by the printing mechanism, and riding on the guide; yieldable means to take behind the stop after the arrival of the printing mechanism in its printing position; a second yieldable means to take behind the stop and prevent the return of the printing mechanism before it arrives in its printing position, the upper edge of the guide being reduced at a point o posite the printing position of the printing mechanism to enable the stop to escape past the last-named yieldable means subsequently to the printing operation as the printing mechanism returns to its initial position.

ii. in a machine of the class described, the combination with a type carrier; a printing member shiftable towards and from its printing position, including a support, and an p ion means shiftably connected to the support; and drive means flexibly connected the impression member; of a guide impr \Vltlll member having a shoulder formed thereon intermeiiliate its ends; a stop shiftably connected to the printing member and adapted to contact the shoulder and cause a flexure of the drive means to disengage the stop from the shoulder; and an arresting member past which the stop travels subsequently to its contact with the shoulder, the stop, on its return, adapted to contact the arresting means and cause a second fiexure of the drive means to shift the impression means and eliect an imprint; the guide being reduced in front of its shoulder to permit the printing member to attain momentum before the stop by its contact with the shoulder resists the operation of the drive mechanism.

in testimony whereof I aiiix my signature.

LiU VRENGE C. OSTENDORF.

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