US2542131A - Total transfer mechanism for - Google Patents

Description

Feb. 20, 1951 'u. GATT! 2,542,131

TOTAL TRANSFER MECHANISM FOR CALCULATING MACHINES Filed Nov. 7, 1945 Z/baldo $19 777 Patented Feb. 20, 1951 TOTAL TRANSFER MECHANISM FOR CALCULATING .MACHINES Ubaldo Gatti, Livornoiltaly, assignor to Ing. o. Olivetti & C. Societa per Azioni, Ivrea, Italy, a

corporation of Italy Application November 7, 1945, Serial No. 627,132 In Italy June 26, 1943 Section 1, Public Law 690,'August 8, 1946 Patent expires June 26, 1963 9 Claims.

It is common knowledge that at the present time vertical additions and subtractions on one or more columns of the visible vertical totalizer may be obtained with calculating-duplicating machines.

Sub-totals or general totals may be obtained bycoupling one or more groups of vertical totalizers.

The sum of figures written in difierent columns may be obtained by using a horizontal or cross totalizer.

Further, in addition to the vertical totalizer, one may have two cross totalizers in order to obtain two horizontal accounts.

It is consequently evident that to obtain subtotals and general totals in one column one has to couple two of the Vertical totalizers horizontally, or else make use of the so-called cross.

The present invention aims at a device includ-- ing means of obtaining sub-total and general totals from each vertical totalizer without necessitating side couplings with other vertical totalizers, or a cross totalizer.

With this device it is therefore possible to ob- I tain the following results:

1 That in a calculating duplicating machine all the vertical totalizers existing in the machine become duplex, that is to say, they are enabled to give sub-totals and general totals.

That such duplex totalizers do not necessitate any other lateral space.

That these duplex vertical totalizers may be installed in any known calculating machine of the typewriter class without any modification of said machine, but with the sole addition of a few elements which in no way impede th working scheme.

That each vertical totalizer already in use may become part of the duplex formation though keeping its characteristics of a simple totalizer intact.

The slightly greater strain on the keys when working in duplex only takes place when the partial totals are being added, not con tinuously while the numbers to'be added are being written.

According to the invention, the two totalizers may be selectively engaged with each other through the intermediary of a single gear relative to which said totalizers are axially displace- ..able. v

. Suitable gear-wheels are always in contact with the 'normal totalizerin one. oi the columns.

while the additional totalizer may be engaged with an intermediate gear, or disengaged at will.

A suitable cam, or similar contrivance, is provided for th engagement and disengagement of the various Maltese crosses of the additional totalizerjsaid cam being worked by return-thrust movement actuated by an element such as'a shaft of the machine, performing an alternate rotational movement.

The position of the teeth of the additional intermediate wheel is regulated by means of a spring, such as a pawl spring, for example.

The device according to this invention may be understood by the following description together with the accompanying drawing which shows an example of said device.

In the said drawing Fig. 1 shows a side View of the device made in accordance with this invention, as applied to a calculating duplicating machine.

Fig. 2 is a section along the line 2-2 of Fig. 1, showing the additional intermediate gear to work the two totalizers.

Fig. 3 shows a plan view of th additional gear with the movement of the driving cam of the levers of the additional totalizer.

Fig. 4 shows a plan View of the additional totalizer.

Fig. 5 is a side view of the additional totalizer with one of the inverted levers, not provided with a Maltese cross but with a point with which to engage the gears of the totalizer.

Fig. 6 is a side view of the additional totalizer with one of the inverted levers provided with Maltese crosses.

Fig. 7 is a detail view of the same lever show in Fig. 5 without the point, but engaged with the Maltese cross.

Fig. 3 is a side view of a conventional totalizer adapted for connection with a calculator ma- Chine. U:

From the embodiment of the invention illustrated in the drawing it may be seen that the case I carrying gear 2 of the driving mechanism rests on a support 3 having a fork-shaped holder 4 (Fig. 2) spaced at its upper part 5 so as to receiv a gear-wheel 6 which, as will be seen, serves 7 to connect the two totalizers.

The lower part of the said holder 4 contains a hollow sleeve l inside which a spring 8 is placed, which presses against a ball 9 engaged with the teeth of the gear-wheel 6.

A screw bolt Ill works against the spring 8 to regulate the tension of the same spring agains .theball9.

provided in the runner i3.

The support 3 is suitably hollowed at its free end so as to carry two opposite balls 3 arranged at the free end of said support.

These balls assure the free running of the outer wall II of the additional totalizer. This totalizer which is shown on the left hand side of Fig. 1 and in side view in Figs. 5, 6 and '7, combines with any conventional totalizer I2 forming part of the calculating typewriter and is secured to the totalizer I 2 by means of the fixed runners or link members I 3-l4 at one end, while at the opposite ends the additional totalizer I5 is so disposed as to allow its free running.

The smooth running of the totalizer I5 along the runners I3-I4 is brought about by the provision of slots or holes It provided in said runners through which screws I! may pass which hold the side walls of the totalizer l5. Thus, said totaliaer can move to the right or left so as to engage one or its own gear-wheels IS with that of the additional gear-wheel 6 which is normally in contact with one of the gear-wheels I!) of the conventional tctalizer I2; if one wishes to detach the additional totalizer I5 all that is to be done is to move the latter to the left so that the teeth of its own gear-wheel I8 are released from the teeth of the additional gearwheel 6. lhe gear-wheels 58 (six of which are shown in Fig. 4) and I9 are conventional tens transfer gears provided on totalizers l5 and I2, respectively. Transfer gears of this type function in a totalizer in a conventional manner, as typically shown in U. S. Patent No. 893,719.

A lever 22''. articulated at 2i on the wall II of the totalizer, is arranged to keep the additional totalizer I5 with its gear-wheel l8 engaged with the gear-wheel 6.

This lever 7'9 has two arms; the one directed towards the machine forms an extension which fits into an appropriate groove or recess The opposite arm 20 carries an attachment 20" which, when depressed, lifts the extension 2i) so as to release the totalizer which can then slide to the left and be freed from the calculator.

On the support 3 is articulated a two-armed lever 22 on which two adjustable extension rods 23-2 i are attached. Rod 23 engages by means of a forked pin 23 with a lever 25 which carries a cam 25 adapted to coact with and engage from below the extension 2': of the additional totalizer levers while rod 24 engages by means of the forl; with a lever 28 coupled with the shaft 29 of the typewriter (not shown); which shaft performs, a semicircular movement, under the control of its driving mechanism (not shown). This movement is transmitted to the cam 26 by means of said rods 23-24. The cam pivots at 26' on. the support 3 so that it may, at the right moment, free the blocked extension 21 serving as a locking means for the various columns of the additional totalizer.

Fig. 1 shows how the additional totalizer I5 is held in place in spite of the slight strain of the cam 26 which coacts with the extension 2! with the result that the totalizer tends to rise slightly. In the same way the tendency of the totalizer I5 to sink or drop, due to its weight, is neutralized,

:causing the totalizer with its attachment II to run on the balls 3' carried by the supporting arm 3.

As heretofore pointed out the new additional 'totalizer I5 is inverted with regard to the normal 'totalizer I2 carried directly by and extending from the typewriter as it may be realized from iii) Fig. 8. In fact, in this totalizer the control levers have two fulcrums 30, 3| (see Fig. 8) while in the new totalizer the levers have a single fulcrum 32, the levers being completely inverted with regard to those shown in Fig. 8.

In Figs. 5, 6 and 7 the levers are shown in inverted position and are shaped accordingly.

In Fig. 5 the lever 33 is provided with a tooth 34 to engage gear-wheel I8, said lever having no Maltese cross.

The totalizer is provided with two other levers 35 (Fig. '7) which is similar in shape to lever 33, but without the tooth for engagement with the gearwheel l8 whose teeth engage with the Maltese cross 36 integral with the tens transmission gears.

In Fig. 6 the other levers 3'! which complete the lever system of the inverted additional totalizer are indicated. Always a single fulcrum is employed, which is designated by numeral 32, these levers 31 engaging with the Maltese crosses 38. It is thus made clear that in the construction of normal vertical and horizontal, or cross, totalizers it sufiices to have one single fulcrum for the levers carrying Maltese crosses instead of having recourse to the inconvenience of two fulorums, thereby eliminating one of the shafts. Springs 43, 44, and 45, Figs. 5-7, keep levers 33, 31 and 35 in engagement with respective gears [8 associated therewith.

.6 with regard to the same parts indicated in the conventional totalizer Fig. 8.

The complete transition of the movement of addition and subtraction from the driving mechanism l to the additional totalizer I5 is shown in Figs. 1 and 3. In these figures it may be seen that when one wishes to accumulate the subtotal formed on the totalizer l2, on the additional totalizer [5 one brings into action the to-talizer l5 until it engages with the intermediate gearwheel 6; this is obtained by raising the lever 20 and causing the additional totalizer to move to the right so that the teeth of its own gear-wheel l8 engage with those of the additional gearwheel; this being done said lever 20 is lowered and engages on the runner I3.

Working with the driving mechanism in subtraction the total found on the totalizer I2 is unloaded and loaded positively on the additional totalizer I5, or vice versa for the whole mechanism if one is working in addition. The gearwheel of the driving mechanism in subtraction revolves clock-wise and so moves the gear-wheel 39 of the totalizer I2; which gear-wheel, in its turn, transmits the movement to the gear-wheels I 9 and this to the visibility wheels 40. Gear-wheel It! also transmits the movement to the intermediat gear-wheel E and then to the gear-wheel combination, a first totalizer, a second totalizer,

each of said totalizers having a plurality of coaxially mounted gears spaced apart in axial direction, the gears of said first totalizer being aligned with respective gears of said second totalizer whereby several pairs of aligned gears are formed, and a gear wheel simultaneously engageable with a gear from each of said totalizers, said gears of said totalizer being axially shiftable relative to said gear wheel so as to effect successive coupling between the several pairs of aligned gears of said totalizers.

2. The combination according to claim 1, wherein said second totalizer is bodily displaceable in the plane of said gear wheel t bring its said gears into and out of mesh with said gear wheel.

3. The combination according to claim 2, further comprising a pair of slotted arms fixed to said first totalizer and extending toward said second totalizer, mounting means projecting from said second totalizer and held slidably in said slotted arms to permit a displacement of said second relative to said first totalizer between two extreme positions, and locking means adapted to secure said second totalizer in one of said extreme positions in which the gears of said second totalizer are engageable by said gear wheel.

4;. The combination according to claim 1, further comprising resilient stop means having yieldable camming engagement with the teeth of said gear wheel so as to prevent spontaneous rotation of the latter.

5. In a calculating-duplicating machine, in combination, a housing, a main driving gear held in said housing against axial displacement, an intermediate gear aligned with said main driving gear and held against axial displacement, a first totalizer having a plurality of transmission gears and a plurality of tens transfer gears, a second totalizer having a plurality of tens transfer gears each aligned with a respective tens transfer gear of said first totalizer whereby pairs of aligned transfer gears are formed, first mounting means slidably supporting said first totalizer in such manner that said main driving gear may successively engage all of said transmission gears while said intermediate gear successively engages all of said tens transfer gears of said first totalizer, second mounting means slidably supporting said second totalizer in such manner that said intermediate gear may successively engage all of said tens transfer gears of said second totalizer, and link means connecting said first with said second totalizer for simultaneous displacement relative to said main driving gear and to said 0 intermediate gear, whereby said intermediate gear may selectively couple together the gears of any of said pairs of aligned transfer gears.

6. The combination according to claim 5, wherein said second mounting means comprises'a stationary arm extending from said first totalizer toward said second totalizer, said arm having an extension carrying said intermediate gear, and resilient stop means mounted on said extension,

0 said stopmeans having yleldable camming en- 6 gagement with the teeth of said intermediate gear so as to prevent spontaneous rotation of the latter.

7. In a calculating-duplicating machine, in combination, a housing, a main driving gear held in said housing against axial displacement, an intermediate :gear aligned with said main driving gear andheld against axial displacement, a first totalizer having a plurality of transmission gears and a, plurality of tens transfer gears, a second totalizer having a plurality of ten transfer gears, first mounting means slidably supporting said first totalizer in such manner that said main driving gear may successively engage all of said transmission gears while said intermediate gear successively engages all of said tens transfer gears of said first totalizer, second mounting means slidably supporting said second totalizer, a link memberlmaintaining said two totalizers in such relative position that each tens transfer gear of said first totalizer will always be aligned with a respectivetens transfer gear of said second totalizer, whereby pairs of aligned transfer gears are formed, said link member being adapted for sliding movement of said second totalizer relative to the first totalizer whereby a selected tons transfer gear of the second totalizer may be moved into and out of engagement with said intermediate gear, and locking means for releasably maintaining said second totalizer in such a predetermined position relative to said first totalizer that one of the tens transfer gears of said second totalizer meshes with said intermediate gear whereby said intermediate gear may selectively couple together the gears of any of said pairs of aligned transfer gears.

8. The combination according to claim '7, wherein said second totalizer is provided with a plurality of locking levers for said tens transfer gears, each of said locking levers having an extension, further comprising can means engageable in said predetermined position of said second totalizer with said extension of said locking lever associated with said tens transfer gear of said second totalizer which i then engaged by said intermediate gear, said cam means being operable to displace the engaged extension in such manner as to render inoperative the locking lever of which said extension forms part.

9L The combination according to claim 8, further comprising a shaft adapted for rotational movement, and linkage means operatively connecting said cam means with said shaft for actuation thereby.

UBALDO GATTI.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 903,866 Julihn Nov. 17, 1908 1,388,218 Thomas Aug. 23, 1921 2,351,897 Anschutz et al. N June 20, 1944

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