US1668256A - Selecting mechanism - Google Patents

Description

May 1,1928. 1,668,256

E. C. WALTER SELECTING MECHANISM Filed April 21. 1925 2 Sheets-Sheet '1 IIIIIIII Illlllllll 6, M ZZ w Mayl 1928.

E. C WALTER 17668256 SELECTING MECHANI SM Filed April 1, 1925 2 Sheets-Sheet 2 Ink-mill! H II II III IHIIIIIHIIIIII II II II II II II I u n H mm M IIIHIIIIIIIIHI lllllill llllllllllnm Illll IIII Patented May 1, 1928.

UNITED STATESIPAT'ENT OFFICE.

EDWARD CLAXTON WALTER, OF ORANGE; NEW JERSEY, ASSIGNOR TO THE ELLIOTT- FISHER COMPANY, OF NEW" YORK, N. Y., A CORPORATION OF DELAWARE.

SELECTING MECHANISM.

Application filed. April 21, 1925.

This invention relates to selecting mechanism forcalculating, machines of that class in which each value to be added or subtracted in a given. denominational position, is selooted by means of key-set selecting mechanism which: determines the extent of the effective operation of. a denominational member operated. subsequent to the selection.

'The object of the invention is to produce a simple and compact selecting mechanism, which, while operative with the requisite accuracy, will permit comparatively narrow spacing of the aligned. series of number wheels or denominational members.

In the accompanyingdrawings:

Figure 1 is an elevation of so much of the mechanism of a calculating machine as is necessary to illustrate the invention.

Figure 2 is a sectional elevation of a portion of the samesubject matter..

Figure 3 is a diagrammatic view showing the relation of the selectors and an intermediate gear.

Figure 4 is a diagrammatic view showing the various relations of they selectors and an intermediate gear, and

Figure 5 is a perspective view of thesubject matter shown in Figures 1 and 2.

In said drawings 1 indicates the number 30 wheel shaft on which a number wheel, in-

dex wheel, or denominational member 2 is mounted. It will, of course, be understood that in practice a series of these wheels are mounted on the shaft and are rotatable in opposite directions from 1 to 9 increments for addition or subtraction; Also, it is usual to provide carrying mechanism whereby, when the limit of value of any denomination is reached, the Wheel of. next higher order will be advanced one increment in one direction or the other accordingly as addition or subtraction is being performed.

Associated with the number wheel 2 is a gear 3, designed to be engaged and operated by an intermediate gear 4, carried by a shaft 5, and in turn operated by rotary toothed selectors 6 and 7, mounted on parallel shafts 8 and 9. The selector 6 is provided with four teeth or projections 10, of diflerent lengths or terminating in different planes, while the selector 7 is equipped with five teeth 11, which are uniform.

The selectors 6 and 7 are splined or otherwise mounted on the shafts 8 and 9, so that while rotatable with the shafts they are ca- Serial No. 24,772.

Figure 4:. The selector 6' is shiftable to four different positions to present from 1 to t teeth in the operative plane of the gear 4 to select the values 1 to 4. The selector 7 is movable to a single set position, which brings all five of its teeth into the operative plane of the gear 4 to select the value of 5.

- Therefore, the selection of 1 to 5 is secured by moving one only of the selectors at a.

time.

It will be obvious that by the conjoint setting of the two selectors. the values from 6 to 9 may be secured. Tosecure the value of six, each selector is moved a single step to the left. This brings the five teeth of the selector 7, and one tooth of the selector 6 into the plane of the gear 4 and if the selector 6 is now moved successive steps to the left, the value selected will increase one unit for each step until the value of nine has been selected.

The specific means whereby the shifting of the selectors to different set positions is effected, constitutes no part of this invention and several forms of mechanism, whereby one or more selectors are shifted laterally by keys are well-known in the art. For instance, in the Reissue Patent 13,841, to F. S. Baldwin is shown a well known form of mechanism for shifting two selecting elements at the proper time in the proper direction and the proper distance by any one of several keys, each of which coacts with a pair of selecting bails connected to the selectors and swung by cams operated by the keys and inclined to determine the extent of movement. The present invention is directed to the particular relation of the selectors and the intermediate gear. The mechanism whereby these gears are moved at the proper time the proper distance is not material, but the use of the Baldwin mode of operating the selectors from the keys is contemplated and only requires the necessary changes of the cam surfaces.

In order, however, to clarify the descrip tion, I have shown, in Figure 1, bell crank levers 12 and 13, arranged to shift the selectors 6 and 7 and operated from keys A,

mined by the number of selector teeth which having the values 1 to 9. i As is Well underare arranged to operate the lever 13 andwith' it the selector 7 a single step. -Therefore,

upon the depression of anyone ofthe first five keys, a single selector will be moved to secure thevalues one to five; while upon the depression of the keys six tonine, two selectors will be set to secure the selection of these values by their conjoint action.

When one or both of the selectors (Sand 7 have been set by the depression of a key, the

shafts 8 and 9 are rotated in the same directlon' from a suitable source of power. as, for

instance, a crank or motor 14, operating a driving gear 15, meshing with gears 16 and 17, on the shafts 6 and 7. Obviously. when the shafts 8 and 9 are rotated, the rotation of the selectors 6 and 7 will impart a degree of. rotary movement to the gear 4, deterare in the operative plane of the gear. It is. accordingly, obvious that this movement will be transmitted to the number wheel 2, to add or subtract the added value in a manner well understood in the art'.

Theforegoing will sutiice to give a clear understanding of the invention, but the right to change or modify the illustrated construction within the spirit of the invention is expressly reserved.

What I claim is 1. In a calculating machine, the combination with a denominational member, of an operating mechanism. therefor, including a plurality of selectors rotatable on different axes to operate the denominational member and settable individually and conjoint'ly to select the values '1 to 9. V

2. The combination with a denominational member, of operating mechanism therefor, including a plurality of individually rotatable selectors mounted, at one'side thereof, and movable to different set positions to select different values by their individual and conjoint action. 1' Y 3. The eomblnatlon with a denominational member, of operating mechanism therefor, including a. plurality of individually rotatable selectors arranged to be set by movement in the same direction and serving individually and conjointly to select a series of values;

l. The combination with a denominational member, of operating mechanism therefor, including a plurality of'selectors rotatable on parallel axes,'and laterally movable to set positions to select by their individual and conjoint action a series of values.

- 5; The combination with a denominational 6. The combination with a denominational member, of operating mechanism therefor, including a plurality of selectors rotatable upon parallel axes and shiftable in the same lateral direction to set positions for the selection of a series of values by their individual and conjoint action.

7. The combination with a denominational member, and a. gear for operating the same, of parallel selector shafts, selectors carried by saidshafts at one side of the gear, and shiftable in theflsame direction to set said selectors for the'operation of said gear, both individually and conjointly, and means for driving the selector shafts. V

8. The combination With a denominational member, of operating mechanism therefor, including a plurality of selectors, one having a series'of teeth and being movable to a single setposition, and the other having a series of teeth and being movable to a: pinrality of set positions, the setting movement of both selectors being in the same direction.

In testimony whereof, I affix my signature.

EDWARD C. WALTER.

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