US1705272A - Adding and listing machine - Google Patents

Description

March 12, 1929.

O. J. SUNDSTRAND ADDING Ann us'rme mamas" Filed Oct. 1 ,1924; jz'sheets-speet 1 I InvawiEfi OacanI fiandlstmnd; 0, M M w a March 121.1929? 0. J. SUNDSTRAND 0 72 ADDING 1mm LISTING mourns Filed 06.13, 1924- 2 Sheets-She 17111611767: 05mm]. flund/atrand,

Patented Mar. 12,- 1929.

UNITED STATES PATENT OFFICE.

OSCAR J. SUNDSTRAND, OF ROCKFORD, ILLINOIS, ASSIErNOR, BY MESNE ASSIGNMENTS, TO SUNDSTRANB CORPORATION, OF WILMINGTON, DELAWARE, A CORPORATION OF DELAWARE.

ADDING AND LISTING MACHINE.

Application filed October 13, 1924. Serial No. 743,188.

This invention relates to adding and listing machines, and more particularly to those.

in which the paper support need not be laterally movable.

The invention is applicable to adding machines of various types, but for convenience in pointing out the improvements efi'ected thereby I shall herein compare a machine embodying the invention with a .machine of the type shown in the Sundstrand Patent No. 1,198,487 illustrating the well known Sundstrand adding machine.

The mechanism of the Sundstrand adding machine is mounted upon a ,cast-metal base and is enclosed within a case, the lower edge of which rests upon the base, the case being secured to the base by means of two screws. The paper carriage issupported upon the framework of the mechanism and is structurally distinct from the case.' The case is either a sand-mold casting or a die casting.

' The casing and the edge of the base are I polished and enameled. The lower edge of the case must be machined so that it may make proper contact with the base.

The present invention has for its object to reduce the cost of manufacture by substituting for the cast-metal case and the structurally distinct paper carriage a unitary sheetmetal case and built-in paper carriage, that is to say, a sheet-metal case in and upon which all of the essential parts of the paper carriage are mounted, the. whole forming a relatively inexpensive unit which may be easily' and quickly applied to and removed from the mechanism. The advantages accruing from the invention will be more fully pointed out in connection with the following detailed description of the present embodiment.

In the accompanying drawings, Figure 1 is a perspective view of an adding andlisting machine embodying the features of my invention.

Fig. 2 is a fragmentary rear end elevation.

Fig. the a side elevation with parts broken :away.

1 denotes a cast-metal base on which the mechanism of the machine is mounted. Two brackets 2 are secured to the base in spaced parallel relation and serve to support some of the mechanism.

The case 3 consists of a drawn sheet-metal stamping, the side walls 1 and 5, the verheretofore used.

It has heretofore been the custom to provide an opening in the top wall to receive a glass plate bearing a series of numerals behind which the digit-indicating pointer traveled as an item was set up. To elimi nate the cost of the glass plate an expense of securing it in place, I substitute a depressed panel 10 integral with the case 3 and of proper size to receive the usual decalcomania transfer 11. In the panel 10 is a horizontal, transverse slot 12 through which the end of the digit-indicating pointer 13 is visible. In the side wall 4 is a vertically elongated opening 14: through which projects the stub shaft on which the hub 15 of the operating handle 16 is removably mounted.

The paper-supporting and feeding means includes a platen 17 rotatably mounted in a rigid frame 18 consisting of two end plates rigidity to the carriage.

The case 3 with the attached paper-supporting means 18 is removably secured in place by means of two screws 24 extending through the front end wall 6 into the front end of the basel, and by means of two screws 25 which extend through openings in the end plates 19 and the side walls 4 and 5 into holes in the ends of a bar 26 that is secured rigidly to the brackets 2 and extends transversely o the machine near the rear the fact that the paper-supporting frame 18 is attached to the bar 26 and hence to the interior framework that supports the printing and adding mechanisms. Drawn sheetmetal cases are apt to vary somewhat, due

to warping and other causes; but such variations in the case do not affect the position of the platen, notwithstanding the fact that the case and the frame 18 are secured together and constitute a unit, because said unit is secured to the interior framework at points relatively close to the printing mechanism.

The paper knife or tearing plate 27 is of ordinary form except that it is shortened to be within the planes of the side walls 4 and '5 so as not to interfere with removal of the case. The paper knife is secured to the interior framework in the usual manner.

The cover 28 for the ribbon spools may be of common form and attached to the case by screws 29, as usual.

The improved construction herein described reduces the cost of the whole machine about twenty per centum, and effects a further economy in reducing the stock kept 011 hand, as cases and paper carriages necessarily correspond in number.

While I have described the present embodiment of the invention in considerable detail, it will be understood that the invention is not limited to all such details, but that, on the contrary, it is applicable to adding and listing machines of various types and shapes, the scope of the invention being defined in the appended claims.

I claim as my invention:

1. An adding and listing machine comprising a metal base, a unitary removable sheet metal case, paper supporting means removable with the case including two end plates secured to said case, a platen carried by said end plates, and means for securing the case to said base arranged also to secure the end plates to the case.

2. An adding and listin machine having, in combination, a removable enclosing-case comprising opposite side walls, and papersupporting means including two end plates rigidly secured to opposite side walls of said case, and a platen carried by said end plates.

In testimony whereof, I have hereunto affixed my signature.

OSCAR J. SUNDSTRAND.

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