US1232020A - Calculator restoring mechanism. - Google Patents

Description

W. FUHBMANN & E. M. SQUAREY. CALCULATOR RESTORIVG MECHANISM.

APPLICATION FILED OCT- 26.1916. 1,23%,020.

Patented July 3, 1917,

3 SHEETSSHEET l.-

no lzwmrom H WfZ/HRMANN L E M. SQUARE) By lab-Aiming.

W. FUHBMANN 64 E. M. SQUAREY.

CALCULATOR RESTORIN'G MECHANISM,

APPLICATION FILED OCT-26.1916 1232,0200 Patente July 3, 1917.

3 SHEETSSHEET 2.

INVENTORS' W fUHRMANN E. M. SQUAREY By his fiflome q W. FUHRMANN & E. M. SQUAREY. CMCULATOR RESTORING MECHANISM.

, APPLICATION FILED OCT. 26. I916. l,%32,020. Patented July 3, 1917.

3 SHEETS-SHEET a.

W FUHRMANN E M SOUAREY WARREN FUHBBIANN, F WESTFliELD, NEW JERSEY, AND EDWARD M. SQUAEEY, OF TUCKAI-IOE, NEW YORK, ASSIGNORS TO ADDOMETER COBI ORATION, OF NEW YORK,

N. Y., A CORPORATION OF DELAWARE.

CALCULATOR BESTORING: MECHANISM.

Specification of Letters Patent.

Patented J 11137 3, 1917.

Application filed October 26, 1916. Serial No. 127,755.

To all whom it may concern Be it known that we, WARREN FUHR- MANN, a citizen of the United States, and a resident of /Vestfield, county of Union, and State of New Jersey, and EDWARD M. SQUAREY, a subject of the King of Great Britain, and a resident of Tuckahoe, county of VVestchester, State of New York, have invented certain new and useful Improvements in Calculator Restoring Mechanism, of which the following is a specification.

One of the objects of the present invention is to provide in a calculator including transfer mechanism, improved means for actuating the restoring member, whereby it will be moved to cause boththe restoring and the transfer to take place during the return movement of a side bar or main actuating member of the machine.

Another object of the invention is to provide means for actuating the restoring bar of a transfer mechanism from an actuating member that moves back and forth; and means for moving the adding pinions relative to the rack bars to engage and disengage the same, which latter means include a member that upon special operation of the machine to change the normal timing of the said engagement and disengagement of the pinions, will disable the connections for shifting the restoring bar.

In the accompanying drawings illustrating one embodiment of our invention, Figure 1 is a side elevation at the left side of the machine. Fig. 2 is a similar view with the pitman in the fully advanced position.

Figs. 3, 4 and 5 are views of the parts in three consecutive positions. Fig. 6 shows a partial plan view. Fig. 7 shows one of the latch arms. Fig. 8 shows one of the latches. Fig. 9 shows one of the holding pawls. Fig.

10 shows the stop pawl. Fig. 11 is a partial I view on the right side of the machine.

In an application filed by us June 1, 1916, Serial No. 101,019, is set forth a mechanism similar to the present invention. In such construction a swinging latch is provided on each side that cooperates with a stop rigidly attached to the pitman on such side. In the present invention the stop is mounted to swing on the pitman and also the latch is movable. Further with the present construction during the initial part of the return stroke of the pitman, the moving stop member on the pitman is caused to swing on the pitman forwardly, while still engaging the latch at the same speed that the pitman is moving rear ard, whereby the stop in engaging with the latch remains practically stationary so that the latch and restoring bar actuated therefrom are not further advanced.

As shown in the drawings, 12 represents the side plate on the right-hand side of the machine, and in Fig. 11 is shown a portion 13 of a similar plate on the opposite side. These plates are provided with guiding vmeans for a restoring bar 14 that extends across the plates and is secured at its ends to short bars 15 and 16 respectively; the restoring bar being guided in slots 17 and 18 in the two plates to move back and forth. Suitable means are provided to move the bars 15 and 16 back and forth in unison, which means are shown in duplicate, one on each of the side plates. An arm 19 swings on a stud 20 on the side plate 12, and is pivoted to a link 21 that is pivoted to the said bar 15 by a stud 22; which latter rides in a slot 23 in the side plate to cause the bar 15 to move back and forth in a straight line. The swinging of the arm 19 will evidently reciprocate the bar 15 and move the restoring bar 14, or one end of it back and forth in the guide slot. One arm 24 of an angle lever swings. on stud 25 and is pivoted to the arm 19; while the other arm 26 of the angle lever extends vertically downward. On this arm 26 is pivoted a bar 27 extending rearwardly and guided at its slotted portion 28 on a stud 29. On the bar 27 a latch 30 is pivoted by a stud 31, and a spring 32 normally presses the forward end of the latch downwardly so that an ear 33 on the latch engages the top' edge of'the bar 27. (See Fig. 8.) The latch has a lug 34 on its lower edge, whose forward face is substantially vertical, while the rearward face is beveled.

A pitman 35 is shown that is swung by means of cranks 36 and 37, from the normal position shown in Fig. 1. to its forward position as shown in Fig. 2. On this pitman is pivotally mounted a stop pawl or stop 38 by stud 39, that is normally held against a pin 40 on the pitman by a spring 41. This stop pawl carries a pin 42 that lies just below the latch 30 as indicated in Fig. 1, and

when the pitman is drawn forward this pin 42 will strike the inclined edge of the lug 34 and swing the latch upward until it passes the lug, when the latch will fall and the pin will lie in front of the lug, as indicated in Fig. 2. When the pitman starts its return stroke from the position shown in Fig. 2, as the stop pawl 38 is prevented from swinging to move its pin 42 forward, (by means to be set forth) this pin will engage the lug to move the latch rearward. This will cause the bar 27 to move rearward and swing the vertical arm 26, which movement will swing the arm 24 upwardly to swing arm 19 and link 21 upward, and hence advance the bar 15 to move the restoring bar 14, or this end of it, toward the front of the machine. But after initial movement on the return stroke of the pitman, the stop pawl 38 is no longer restrained, and will swing on the pitman to release the latch, which is effected as soon as the restoring bar is given its proper forward movement through said means. restraining of the stop pawl 38 is accomplished by means of a roller pin 43 that is fixed on the side plate 12. As shown in Fig. 1, this fixed pin 43 is normally free of thestop pawl 38; but when the pitman.

makes its full advance carrying with it the stoppawl, as shown in Fig. 2, this fixed pin 43 will lie beneath a shoulder 44 of the stop pawl, and will prevent the upper portion of the pawl carrying the pin 42, from swinging forward on the pitman by its engagement with the latch lug -34, on the rearward movement of the pitman and stop pawl. Hence the engagement of the pin 42 with the latch will swing the said arms and links and cause the forwardmovement of the restoring bar at this end. But as this movement continues, the stop pawl will be carried rearward and the fixed pin 43 will ride along the pawl shoulder 44 until it reaches the curved edge 45, (se'eFig. 5), that will permit a slight swing of the pawl onthe pitman. This curve is eccentric to the axis of the pawl, and hence will still slightly retard the swing ofthe pawl. The continued advance of the pawl and pitman will permit the pawl to swing forwardly on the pitman free from pin 43, and the pin will no longer restrain its movement, so that the pin 42 on the pawl will release the latch lug 34, and the latch and connected parts will be no longer moved rearwardly. The contour of this curved edge 45 of the stop pawl is so designed that the pin 42 on the pawl will move forwardly relative to the side I plate, at practically the same speed that the pitman is now moving to the rear, which results in the pin 42 remaining practically stationary relative to the side plate, although it will have a slight downward -movement in a verticalpath. From this it follows that This fore, as soon as the pin 42 releases the latch that has effected the forward movement of the restoring bar and connected parts, this spring 46 would return these parts to normal position unless otherwise restrained. However, in the operation of the machine the restoring bar must be held in the for-- ward position until the latter part of the return stroke of the pitman, and then released.

The restraining means set forth comprise on one side, a detent pawl 50 pivoted on the side plate 12 and provided with a shoulder 51 adapted to engage with the lower extremity of the arm 26 and hold the arm with the restoring bar advanced, as .shown in Fig. 3. The pawl is pressed upwardly against the arm 26 by a spring 52. In the normal position of Fig. 1 this pawl engages the end of the arm 26 beyond the shoulder, but as this arm swings forward when the arm 24 swings upward on advance of these parts by the latch, the end of arm 26 will move rearward beyond the shoulder, and hence will engage the shoulder when the latch is released from the stop pawl on the pitman At the final part of the return stroke of the pitman, a stud 53 on a strip 54 fast on the pitman, will strike an" arm 55 of the pawl 50 and swing the pawl so that its shoulder 51 will release the arm 26; whereby the connected parts are free to be retracted by the spring 46 to normal position.

On the opposite side of the machine a duplicate of these parts is provided, as shown in Fig. 11. An arm 59 swings on a stud 60 on the side plate 13, and is pivoted to a link 61 that is pivoted to the said bar 16 by a stud 62; which latter rides in a slot 63 in the side plate to cause bar 16 to move horizontally. One arm 64 of an angle lever pivoted at 65, is pivoted to the arm 59, while the other arm 66 of the angle lever extends downwardly. On the arm 66 is pivoted a bar 67 extending rearwardly and guided at whereby the two pitmen move back and forth in unison. The pitman has a stop pawl 78 pivoted thereon by stud 79, that is held against a pin 80 on the pitman by a spring 81. .This stop pawl carries pin 82 that lies just below the latch 70 and will engage and cotiperate with this latch, as described with reference to the similar latch on the opposite side. A roller pin 83 is secured to the side plate 13, and cotiperates with a shoulder 84, and curved edge 85, of the stop pawl 78. On this side of the machine a spring 86 serves to retract the restoring bar and the connected parts just described, when they have been advanced by engaging of-the stop pin 82 with the lug 74 of the latch 70.

A detent pawl 90 is pivoted on the side plate 13, and has a shoulder 91, that is pressed toward the end of the arm 66 by a spring 92. A pin 93 on a strip 94 carried by the pitman 75, will strike an arm 95 of the pawl 90, at the final part of the return stroke of the pitman, whereby to swing the pawl to release the arm 66.

111 machines of this character, special operations are effected that are brought about by depression of special keys, that change the timing of the engagement of the adding pinions with the rack-bars and the segments. During such special operations no carrying is effected and hence the restoring bar should not be shifted. We provide means whereby during the depression of any of these special keys this mechanism for shifting the restoring bar is disabled. Tn Figs 1 and 2 are shown special keys 47, 48 and 87, that when either is depressed, will engage the lever a9 and depress the lever and hold it depressed until the keys are restored. This lever is fast to a shaft 56 and will raise an arm 57 that is arranged to engage a pin 58 on the latch 30. This movement is sutiicient to hold the latch with its lug 3a out of position for engagement with the stud 42 on the stop pawl. (See Fig. 2.) Therefore, the latch will not be engaged by the advance and return of the pitman. The shaft 56 8X- tends across the machine and there carries an arm 76 that serves to elevate a strip 77, (see Fig. 11). The latter will engage a pin 1 on the latch 7 0, so that this latch will be raised at the same time that the latch 30 is raised. Thus the depression of either key will raise both latches and prevent any movement of the restoring bar by the pitmen, until the key is restored. Means are shown in Fig. 1 for retaining the keys 4.7, 87 and 48 depressed when they are operated until the return stroke of the pitman 35. A bar 2 is suitably guided to reciprocate and has inclined slots 3,4: and 5 that engage pins 6, 7 and 8 on the keys 4:7, as and 87 respectively. When either key is depressed the pin will engage the wall of the slot and move the bar 2 rearward to further tension its retracting spring 100. The bar 2 is locked in its rearward position by a latch 88 that engages a notch 89 in the bar. The latch 88 carries a pawl 101 that will be engaged by a pin 102 on the pitman 37 at the latter portion of its return stroke, whereby the latch will be swung to release the bar 2 and permit the keys 47, 48 and 87 to be retracted by their respective springs 9, 10 and 11. On the forward stroke the pawl 101 will swing and not shift the latch.

The purpose of the restoring bar is to control carrying segments 96, that coiiperate with the adding pinions 97. These pinions are shifted back and forth between a posi tion engaging the segments 96 as shown in Fig. 1, and a position engaging the rack-bars 98, as shown in Fig. 2, by suitable means, not herein shown. In the normal operation of adding, the pinions remain forward engaging the segments during the forward stroke of the pitman, and at the end of such stroke the pinions are shifted free of the segments and engage the rack-bars. The pinions remain in such position until the latter portion of the return stroke, when they are brought forward to again engage the carrying segments. Therefore, the carrying operation of the segments is effected at this latter part of the return stroke, when the pinions are again brought to engage the segments, and this is usually done by a spring 99 on each segment, by reason of the restoring bar moving rearward at this time 4 to permit such spring to swing the segment- Those segments that have been tripped to carry, remain in this position at the end of an operation, and such segments are returned to a latched position when the restoring bar is moved forward at the inital part of the succeeding return stroke of the pitmen. it is customary in this art, when the segments are restored, that they are engaged by a suitable latch or pawl, that is tripped when the pinions pass the numeral 9 tocarry.

In the operation of the device, the pitman moves forward from the normal position of Fig. l to that indicated in Fig. 2,

and the stop pawl 38 will be carried forwardly, its pin 42 striking the beveled edge I of the lug 34: to swing the latch 30 upward until at the end of this movement, the pin will pass beyond the lug 34 and the latch return to former position, as shown in Fig. 2 in the broken line position. In this view the latch is shown in full as lifted by the depression of the special key 48. During this forward movement, the latch merely swings upward and is retracted without moving any of the connected parts. As the pitman begins its return movement, the pin 42 will engage the lug 34, tending to swing the stop pawl 38 forward, but this is prevented by the roller pin 43 now positioned beneath the shoulder 44 of this pawl. Hence the pawl cannot swing on the pitman and the pin 43 must move the lug and latch 30 rearward. As shown this lug has a transverse shoulder, and the pin engages the latch below its axis on the bar 27, the latch and bar will be shifted rearward, to swing the arms 26, 24 of the bent lever, that will move the link arms 19 and 21 and bar 15,

to move the restoring bar 14 forward, or this end of it. As the two pitmen move forward and back in unison and as the parts just described are duplicated on the opposite side as shown in Fig. 11, this end of the restoring bar will be moved forward in unison with the other end. But this movement of the pitman and stop pawl 38 rearward will cause the pawl to engage the pin by its curved edge 45, that will permit a slight swinging of the pawl forwardly. This movement is so designed that at this stage the forward movement of the pin 43 on the pawl corresponds with the rearward move: ment of the pitman, which means that the pin 43 will practically stop movement relative to the side plate and hold the lug 34 and other parts in the advanced position. This is effected when the restoring bar 14 has been moved the required distance, or a very short excess movement. On the opposite side the stop pawl performs the same function. This position of the parts is indicated in Figs. 3 and 4, but in the latter the pawl 38 is moving its curved edge 45 downwardly and is no longer restrained by the roller pin 43. This will nowrelease the pawl 38 and the retractile springs 46 and 86 will tend to return the latch bar and connected parts. But when the arm 26 was swung forward with the advance of the restoring bar, its lower end became engaged by the shoulder 51 of the pawl 50, and now upon the arm 26 being released by the latch, it will be held against retraction by this detent pawl. On the other side the arm 66 will be held by the pawl 90 in the same man ner. Hence the restoring bar will be held at both ends in the advanced position. As

the pitmen reach the final part of the return stroke they will swing the detent pawls 50 and 90 to release the arms 26 and 66, and the two retractile springs will return the restoring bar and connected parts on each side to normal position, as in Fig. 1. The stop pawls 38 and 7 8 will be released from the lugs on the latches and swung back to normal upright position, as indicated in Fig. 5.

The depression of either of the three keys 47, 48 or 87 will swing the levers 49 and 76, to shift and hold the latches 30 and 70 out of position for engagement with the pins on the two stop pawls. Therefore, the restoring bar will not be disturbed by the advance of the pitman.

Having thus described our invention, What we claim is 1. In a calculator, the combination of a restoring bar, shifting means for the bar, retracting means for the bar and shifting means, a pitman, connections between the pitman and a member of the shifting means comprising a latch-pivoted on one of these members and a stop pivoted on the other member that is engaged by the latch, the stop and latch being arranged whereby on advance of the pitman the latch will swing Without moving the shifting means and bar, but on the return stroke of the pitman the stop and latch will engage whereby to shift the restoring bar, means arranged to shift the stop and release the latch after the initial movement of the restoring bar, whereby the bar and shifting means are released for retraction, means arranged to engage and hold the shifting means and re'-' storing bar in advanced position on said re lease of the latch and stop, said holding means at the final part of the return stroke of the pitman being caused to release said shifting means to permit full retraction of the shifting means and restoring bar.

2. In a calculator, the combination of a .to shift the stop and release the latch after the initial movement of the restoring bar, whereby the bar and shifting means are released for retraction, means arranged to engage and hold the shifting means and restoring bar in advanced position on said release of the latch and stop, said holding means at the final part of the return stroke of the pitman being caused to release said shifting means to permit full retraction of the shifting means and restoring bar, special keys on the machine, and means for causing the operation of said keys to shift the latch out of range of the said stop.

3. In a calculator, the combination of a restoring bar, shifting means for the bar, retracting means for the bar and shifting means, apitman, connections between the pitman and a member of the shifting means comprising a latch pivoted on one of these members and a stop pivoted on the other member that is engaged by the latch, the stop and latch being arranged whereby on advance of the pitman the latch will swing storing bar in advanced position on said release of the latch and stop, said holding means at the final part of the return stroke of the pitman being caused to release the shifting means to permit full retraction of the shifting means and restoring bar.

8. In a calculator, the combination of a swinging lever, a restoring bar, connections between the bar and lever, means to retract the bar and lever, a latch pivotally connected with the lever, a pitman, a step pivoted on the pitman and arranged to engage said latch, the stop and latch being arranged whereby on advance of the pitman the latch will swing without moving the lever and bar, a fixed pin on the machine arranged to engage the pitman stop during initial return movement of the pitman whereby to cause the stop to advance with the pitman and move the latch and lever to shift the restoring bar, said pin upon further advance of the pitman being disengaged from the stop whereby the stop will swing on the pitman and release the latch, means arranged to engage and hold the lever and restoring bar in advanced position on said release of the latch and stop, said holding means at the final part of the return stroke of the pitman being caused to release the lever to permit full retraction of the lever and restoring bar.

9. In a calculator, the combination of a swinging lever, a restoring bar, connections between the bar and lever, retracting means for the bar and lever, a latch pivotally connected with the lever, a pitman, a stop pivoted on the pitman and arranged to engage said latch, the stop and latch being arranged whereby on advance of the pitman the latch will swing without moving the lever and bar, a fixed pin on the machine arranged to engage the pitman stop during initial return movement of the pitman whereby to cause the stop to advance with the pitman and move the latch and lever to shiftthe restoring bar, said pin upon further advance of the pitman being disengaged from the stop whereby the stop will swing on the pitman and release the latch, a pawl having a shoulder arranged to engage said lever when advanced by said means whereby to hold the lever and restoring bar inadvanced position on release of the latch from the pitman stop, and means on the pitman to swing the pawl at the final part of the return stroke of the itman to release said lever and permit ful retraction of the lever and restoring bar by said means.

10. In a calculating machine, the combination with adding mechanism includin a series of counters, a restoring bar extendlng across the machine to cooperate with all of the counters, and a-pitman on each side of the machine, of a lever swinging on each side plate, connections between each said lever and the bar, means on each side plate to retract the bar and lever, a latch pivotally connected with each lever, a stop pivoted on each pitman and arranged to engage the adjacent latch, the stop and latch being arranged whereby on advance of the pitman the latch will swing without moving the lever and bar, a fixed pin on each side of the machine arranged to engage each pitman stop during initial return movement of the pitman whereby to cause the stop to advance with the pitman and move the latch and lever to shift the restoring bar, each said pin upon further advance of the pitman being disengaged from the stop whereby the stop will swing on the pitman and release the latch on each side, a pawl on each side plate having a shoulder arranged to engage the adjacent lever when advanced by said means whereby to hold the levers and restoring bar in advanced position on release of each latch from its pitman stop, and means on each pitman to swing its pawl at the final part of the return stroke of the pitman to release said levers, and permit full retraction of the levers and restoring bar by said means. a

11. In a calculator, the combination of a restoring bar, shifting means for the bar, retracting means for the bar and shifting means, a pitman, connections between the pitman and a member of the shifting means comprising a latch pivoted on one of these members and a stop on the other member that is engaged bv the latch, the stop and latch being arranged whereby on advance of the pitman the latch will swing without moving the shifting means and bar, but on the return stroke of the pitman the stop and latch will engage whereby to shift the restoring bar, means arranged to shift the stop and release the latch after the initial movement of the restoring bar, whereby the bar and shifting means are released for retraction, means arranged to engage and hold the shifting means and restoring bar in advanced position after slight retraction on said release of the latch and stop, said holding means at the final part of the return stroke of the pitman being caused to release said shifting means to permit full retraction of the shifting means and restoring bar.

12. In a calculator, the combination of a swinging lever, a restoring bar, connections between the bar and lever, retracting means for the bar and lever, a latch pivotally connected with the lever, a pitman, a

stop pivoted on the pitman and arranged to engage said latch, the stop and latch being arranged whereby on advance of the pitman the latch'willswing without movin the lever and bar, a fixed pinon the mac ine arranged to engage the pitman stop during initial return movement of the pitman whereby to cause the stop to advance with the pitman and move the latch and lever to shift the restoring bar, said pin upon further advance of the pitman being disengaged from the stop whereby the stop will swing on the pitman and release the latch, a pawl having a shoulder arranged to engage said lever when advanced by said means whereby to hold the lever and restoring bar in advanced position after slight retraction on the release of the latch from the pitman stop, and means on the pitman to swing the pawl at the final part of the return stroke of the pitman torelease said lever and permit full retraction of the lever and restoring bar by said means.

13.'In a calculator, the combination of a restoring bar, shifting means for the bar, retracting means for the bar and shifting means, a latch pivoted on the shifting means, a pitman, a stop pivoted on the pitman and arranged to engage said latch, the stop and latch being arranged whereby on the advance of the pitman the latch will swing without the stop causing movement of the shifting means and bar, a fixed pin on the machine arranged to engage the pitman stop during initial return movement of the pitman whereby to prevent the stop from swinging but cause it to advance with the pitman while engaging with the latch to.

thereby advance the latch and shifting means to shift the restoring bar, the fixed pin and stop upon further return movement of the pitman permitting free swing of the stop on the pitman whereby to release the latch for retraction, means arranged to engage and hold the shifting means and restoring bar in advanced position on said re- 40 lease of the latch, said latter holding means at the final part of the return stroke of the pitman being caused to release the shifting means to permit full retraction of the shifting means and restoring bar.

14. In a calculator, the combination of a restoring bar, shifting means for the bar, retracting means for the bar and shifting means, a latch pivoted on the shiftingmeans, a pitman, a stop pivoted on the pitman and arranged to engage said latch, the stop and latch being arranged whereby on the advance of the pitman the latch will swing without the stop causing movement of the shifting means and bar, a fixed pin on the machine arranged to engage the pltman stop during initial return movement of the pitman whereby to cause the stop to advance with. the pitman while engaging with the latch to thereby advance the latch and shifting means to shift the restoring bar, said stop and fixed pin upon further advance of the pitman permitting the stop to swing on the pitman whereby its engaging portion with, the latch will have a rearward movement relative to the advancing pitman that will remain practically stationary and not further advance the latch, the fixed pin and stop upon further return movement of the pitman permitting free swing of the stop on the pitman whereby to release the latch for retraction, means arranged to engage and hold the shifting means and restoring bar in advanced position on said release of the latch, said latter holding means at the final part of the return stroke of the pitman being caused to release the shifting means to permit full retraction of the shifting means and restoring bar.

WARREN FUHBMANN. EDWARD M. SQUABEY.

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