US689447A - Adding-machine. - Google Patents

Description

No. 689,447. Patontd Dec. 24, IQDI.,I

F. A. WURDEN.

ADDING MACHINE.

(Applicntinn led Apr. 28, 1900.) (Ilo Model.)

' UNITED STATES PATENT OFFICE.

FRANK A. VORDEN, OFl YPSILANTI, MICHIGAN.

ADQINGEMACHINE.

' SPECIFICATION formingl part of Letters Patent No. 689,447, dated December 24, 1901.

Application iiled April 26, 17900. Serial No. 14,371. (No model.)

To' all whom it may concern.-

.Be it known thatLFRANK A. WORDEN, a citizen of the United States, residing at Ypsilanti, in the county ofv Washtenaw and State of Michigan, have invented certain'new and useful Improvements in Adding-Machines, of which the following is a specitication,'refy erence being had therein to the accompanying drawings.

The invention consists in the construction of an adding-machine, and particularly in the construction and arrangement of the adding-wheels and of the carrying mechanism, and. infthe construction, arrangement, and combination of the various parts, all as more fully hereinafter described. v In the drawings, Figure l is a plan View of my improved adding-machine, the top of the tens e wheel being cut off to lshow the ratchet and carrying mechanism beneath. Fig. 2 is a perspective view of the tenswheel, showing the carrying mechanism in position to carry. Fig. 3 is a vertical section through v:is

one of the posts or pins uponwhich the register-wheel and the ratchet are carried.

The parts are shown as supported upon a base-plate A. Arranged in a circular line along the edge of this plateare a series of vertical posts or pins B. At the top of each pin is a cap C, which in this case I have shown of sheet metal of substantially umbrella shape with a central cylindrical socket D engaging over and by means of which the cap is secured to the post by any suitable meanssuch, for instance, as brazing or welding. Around the edge of this cap are marked in consecutive order figures indicating the digits, as plainly shown in Figs. 1 and 2. At the point where the cipher-sign would be on the plate is an aperturey D', through which the figures on the register-wheel E beneath may be seen. These figures are preferably the digits and a cipher and correspond to figures upon the outside of the cap C. The register-wheel E, I preferably make of sheet metal of shape complementary to that of the cap C and havingthe horizontal flange a ex- Y tending out beyond the edge of the cap and provided with theapertures b, one aperture opposite'each figure. This register-Wheel is secured to the top of a sleeve F, which is journaled upon the pin B. 'At the lower end this finger H, which preferably projects sleeve carries a ratchet-wheel G and a carrierbeyond theratchet-wheel, as shown. y

I represents back'stop-pawls which are in tended to prevent the register-wheels from turning in the wrong direction and are piv- V oted on the base-plate Anand engage with the ratchet-wheel, as plainly shown in Fig. 1.

. .I represents a'series of arms extending radially from the lower portion of the plate into proximity to the carrying-wheels, one for each wheel above the units-wheel. These arms .I are pivoted upon the base-plate, and each is actuated by a spring L and held normally against a stop M in the position shown. At the outer end each arm carries a pawl c, extending into engagement with the ratchetwheel, and has a portion or bracket d extending into the pathof the carrying-finger H of the ratchet-wheels.

In order to operate this device, the proceeding is as follows: Suppose that six units are to be added. The operator inserts a stylus or the point of a pencil in the aperture in the flange a of the register-wheel which is opposite the number 6 upon the cap C and then turns that wheel until it registers with the stop O on the cap, which stop is placed between the f 9 and the cipher-mark on the cap. number will be exposed through the aperture D in the cap. Supposing that the machine started at zero, the igure 6 will be exposed through this aperture. Now if six more are to be added the operator repeats the operation described and the iigure 2 will be exposed through the aperture D in the Aunitswheel. y In order to carry to the tens-wheel during the second movement described, the carrying-finger H on the units-wheel will strike the bracket or projection d on the tenscarrying arm and will rock that'arm about its pivot and through the engagement of the pawl c with the ratchet-wheel on the tensregisterwheel will move that register-wheel `one notch.

This will add six units, and the desired IOO lost motion between the various wheels at the carrying-point and also the preventing of the possibility of a Wheel of lower denomination being turned upon the operation of a wheel of higher denomination. In order to insure a proper carrying without lost motion, I arrange the carrying-finger I-I in such relation to the carrying-arm .I or the bracket thereon that when the stylus is brought to a stop against the stop O when the 9 is exhibited the carrying-iinger H is directly in contact with the bearing or finger upon the arm J and preferably so that the spring L of the carrying-finger is under tension slightly, so that it will hold the ratchet-wheel in direct `engagement with the pawl c of the carryingarm. The position of these parts at the car- 4 rying period is shown in Fig. 2, and it will be seen that the spring of the arm J in that position through the projection d and the carrying-finger H is holding the ratchet-wheel G directly against the pawl c of the next lower carrying-arm. In this instance the machine is shown as capable of registering up to nine for instance, to the sum given-one million and one.

In order to insure the positive engagement of the carrying mechanism as described, I may and preferably do arrange a stop O a triiie beyond the position necessary to eifect any registration, so that the stylus will move the necessary distance and a slight distance beyond. This overthrow, however, is only necessary at the carrying-point, and I may therefore accomplish it by arranging the aperture d, which is beside the zero-mark on the register, slightly out of its true position, so as to effect this overthrow only when the stylus is inserted in this particular aperture.

I deem it desirable to arrange my register- Wheels in the circular line described because it makes the machine very compact and enables me to arrange the carrying-arms .I on radial lines which may easily be' struck from the center, and also because it enables me to group the wheels in such position as to actuate it with the least possible movement and in a position which it is natural for the hand to travel.

It will be seen from the description given that nearly all the parts may be made from sheet metal stamped into the desired configuration, and thus that the machine is an extremely simple one besides being absolutely correct in carrying, no matter how many of the wheels are being used as carrying-wheels at any one time.

What I claim as my invention is 1. In an adding-machine,the combination of a series of register-wheels adapted to be actuated by a stylus engaging bearings in the wheel, a rachet-wheel secured to each addingwheel, a carrying-finger, a carrying-arm for each wheel above the units, a pawl thereon, a stop for the stylus, and means for causing the wheel to slightly overtravel whenmoved into position for carrrying whereby the highest wheel of a number carrying simultaneously, will be the first to complete its movement and to release its carrying-arm, and the lowest of the series will be the last.

2. In an adding-machine, the combination with a series of register-wheels, of a plurality of transfer mechanisms respectively arranged between adjacent register-wheels each being adapted when actuated to slightly overcarry the wheel of higher denomination and then to disengage therefrom, whereby the highest wheel of a number carried simultaneously will be the first to complete its movement and disengage from its transfer mechanism.

3. In an adding-machine, the combination with a series of register-wheels, of .a plurality of transfer mechanisms respectively arranged between adjacent register-wheels,each comprising a carrying -flnger connected to the wheel of lower denomination, a ratchetwheel connected to the register-wheel of higher denomination, and an intermediate pivotal carrying-arm having a portion extending into the path of said finger, and a pawl extending into engagement with said ratchetwheel,said transfer mechanism being adapted to slightly multiply the angular movement of the higher wheel, and to overcarry the same before disengagement of the actuating carrying-finger from said carrying-arm whereby the highest wheel of a number carried simultaneously will be the first to be disengaged; and means for returning said register-wheels the amount of their overmovement after disengagement from the transfer mechanism.

4. In an adding-machine, a register-wheel comprising a marginal portion having bearings for the engagement of a stylus, and an inclined figured portion within said marginal portion.

5. In an adding-machine, a register-wheel comprising a marginal portion having bearings for the engagement of astylus, and a central dome-shaped figured portion.

6. In an adding-machine, a register-wheel comprising a marginal portion having bearings for engagement of a stylus, a central dome-shaped figured portion and similarlyshaped stationary cap covering said domeshaped portion being apertured to expose one of the figures thereon, and having an outwardly-projecting portion forming a stop for the stylus.

7. In an adding-machine, a register-wheel formed of sheet metal having, a horizontal l said tubular portion ami a marginal portion marginal portion having bearings for a stylus thereon, a downwardly-projecting peripheral ange, a dome-shaped central gured portion and a centrally-depending sleeve forming a journal for the Wheel.

8. In an adding-machine, the combination with a base of a stationary pin projecting therefrom, a register-Wheel sleeved upon said pin comprising a tubular journal, a domeshaped gured portion at the upper end of having bearings for a stylus; and a stationary cap of similar dome shape having an up wardly-projecting tubular portion secured upon the upper end of said. stationary pin.

In testimony whereof I aix my signature in presence of two witnesses. n

' FRANK A. WORDEN. Witnesses:

DAVID R. MoRoRD, FRANK WHITMAN.

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