US157690A - Improvement in adding-machines - Google Patents

Description

3Sheets-Sheet1. M. LAWRENCE.

Adding-Machines. N0.157,690. Patented DEC-15,1874.

WITNESSES INVENTOR.

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3 Sheets--Sheet2. 1. M. LAWRENCE. Adding-Machines.

No.157,690. PatentedDeb.151874.

WITNESSES.

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UNITED STATES PATENT OFFICE.

JOHN M. LAVVRENGE, OF NEW YORK, N. Y.

IMPROVEMENT IN ADDING-MACHINES.

Specification forming part of Letters Patent No. 157.690, dated December 15, 1874; application filed May 19, 1874.

To all whom it may concern:

Be it known that 1, JOHN M. LAWRENCE, of the city, county, and State of New York, have invented, made, and applied to use a new and Improved Adding-Machine, of which the following is a specification, reference being had to the accompanying drawings and to the letters of reference marked thereon, in whichv s Figure 1 is a top view of my adding-machine. Fig. 2 is a side view of the same, the gong being removed. Fig. 3 is a view of the machine, the top plate being removed. Fig. 4 is a side view of one of the wheels and collars. Fig. 5 is a view of the opposite side of the wheel and collar. Fig. 6 is a sectional view of the shaft, collar, and wheel. Fig. 7 is an end view of the machine, showing the shaft for operating the gong. Fig. Sis a side view of a portion of the machine, showing the arrangement for striking the gong.

In the drawing like parts of the invention are pointed out by the same letters of reference.

The nature of the present invention consists in the construction, as more fully hereinafter set forth, of an improved adding-machine, the object of the invention being the production of an adding-machine that shall be reliable in its operations.

To enable those skilled in the arts to make and use my invention, I will describe the same.

A shows a base-plate for supporting the operative parts of the machine. B are standards secured upon the base-plate A, and supporting a shaft, 0, upon which are placed the counting-wheels D and D any number of which may be employed. These wheels may be made of any suitable material, and have engraved or printed upon them the numbers. Upon one side of the face of each wheel the metal is cut away, as indicated at a, and this cutting away is directly in line with the ures engraved upon the face, so that as the wheels are revolved the rollers E, held in the arms F supported upon a shaft, G, playing in the standards H secured upon the plate A, shall bear upon the wheels D and D by dropping into the cut-away portions of the same, and stop each wheel after it has been moved a certain distance, and bring the recording-figure into position beneath the openings in the top-plate K. I shows spiral springs wound around the shaft G, and having their ends attached to the arms F and the plate A. J and J are collars placed upon the shaft 0, and provided with a series of slotted plates, 1), attached at one end of each collar, while upon the opposite end of the collar are out a series of ratchet-teeth, c, with which a pawl, d, engages, and upon this pawl a spring, 0, bears to keep it in position. The pawl d, with which the ratchet-teeth c engages, is attached upon the interior of the wheel next in position upon the shaft 0, and as the collar J is turned, as explained hereinafter, the ratchetteeth 0 engage with the pawl d and turn the wheel to which it is attached one place or figure. L are a series of cams secured upon the plate A. The wheels D are provided with the ears f and openings g, said openings being intended to allow pins h passed through the ears f to be thrown out and engage with the slotted plates 1) upon the collars J and turn the collars J A spiral spring, 2', is passed over each of the pins h.

The turning of the collars is effected thus When the wheel D has been moved eight times, and the figure 9 upon the same has been brought beneath the proper opening in the top plate K, thepin h, one end of which impinges against the cam L, has its forward end thrown forward through the opening g, and enters and engages with the plate 1) upon the collar J and the collar J to which the plate bis attached, is revolved. The spiral spring 2, which is compressed as the pinit is thrown forward, expands and restores the pin h to its former position as the collar is turned and the pin passes the cam L. I

In connection with the wheels D and D are employed a series of tapes or hands, M, numbered on their forward ends from 0 to 9. The rear ends of these tapes are attached to the collars J and J N is a shaft, attached upon the forward under side of the plate K, and

having upon it a series of rollers, N over which the tapes or bands M pass; and to the forward ends of the tapes or bands may be attached hooks O, by which the tapes may be drawn out. K shows the upper plate of the machine, slotted at its rear end P, and also at its forward end It. The slots P are inserted to allow the figures upon the wheels D and D to be easily seen when brought into position, and the slots R to allow the figures upon the tapes or bands to be seen as they are drawn out. Q is a shaft moving in boxes V, attached to the under side of the plate K, and provided with a series of forked levers, S, and a handle, T, secured upon one end of it, the forked levers being placed beneath the tapes or bands. In 1 advance of the shaft Q is suspended, in boxes XV, the shaft U, the springpieces X provided with the pins Y, the rear portion of said pins entering the forked levers S, and to the forward portion of which are attached one end of the spiral springs Z, the opposite ends of which are attached to the base-plate A.

As the shaft Q is rocked back by the movement of the handle T, the forked levers S, operating upon the pins Y, have a tendency to throw downward the spring-pieces X, and relieve them from bearing upon the under sides of the tapes or bands M.

A series of coiled springs, 10, are employed upon the shaft 0 and collars J and J to cause the return of the tapes or bands after they have been drawn out, these springs being expanded as the tapes or bands are drawn out, and their contraction causing the tapes or hands to be drawn back to their former position.

Such being the construction, the operation may be thus described: l/Vhen it is desired to add any two series or sums of figures togetheras, for example, 13 and 7the wheels D and D are revolved until the figure 0 upon such wheel is brought opposite the openings in the top plate K. The tape or band attached to the collar interposed between the wheel upon the right-hand end of the shaft and the next one, or between the unit-wheel and the ten-wheel, (so to speak,) is drawn out until the figure 1 upon it is brought opposite or beneath the opening in the front of the top plate; and by this drawing out of the tape or band the wheel is revolved one place or figure, and the figure 1 is brought beneath the opening in the rear of the top plate K. The wheel in this position is held by the roller E in the arm F, which engages with the flanged portion of the wheel and prevents its return, while the tape or band, which, by being drawn out or unwound from the shaft 0, has expanded one of the coiled springs placed upon the shaft 0, is, by the contraction of this spring upon the shaft 0, rewound upon said shaft 0. The tape or band attached to the collar placed at the right of the unit-wheel is now drawn out until the figure 3 is brought beneath the opening in the front of the plate K, and the wheel moves sufiiciently to allow the figure 3 to be presented beneath the opening in the rear of the top plate K. The wheel in this position is held as in the case already described, and the tape is returned to its former position in the same manner. We now have the figures 13 presented beneath the openings in the rear of the top plate, and to add 7 to the same the tape or band attached to the collar at the right of the unitwheel is drawn out until the figure 7 is presented beneath the proper opening in the front of the top plate K. As the tape or band is drawn out the wheel is turned until the figure 9 is presented beneath the opening, where the rear end of the pin h impinges upon the upper portion of one of the cams L, and is thrown forward so that its forward end engages with one of the slotted plates b secured upon one of the rollers J and the wheel continuingits movement the figure 0 is brought beneath the proper opening, the collar J is partially revolved with the pin engaging with the slotted plate upon it, and, as it is moved, the ratchet-teeth 0 upon its opposite end are brought into contact with the pawl (Z secured upon the inside of the ten-wheel, which is turned one place,

and the figure 2 is brought beneath the proper opening in the rear of the top plate, and we have 20, or twenty shown beneath the opening, as the result of adding seven and thirteen. The operation is precisely the same as decribed when any number of wheels are used, the tapes or bands and wheels operating as set forth.

The handle T, attached upon end of the shaft Q, should be thrown forward when it is intended to draw out the tapes or bands, as by this movement the levers S operate upon the pins Y, and tip down or relieve from contact with the tapes or hands the spring-pieces X, and thus allow the tapes to be drawn out freely. \Vhen the tapes or bands are drawn back the hold upon the handle T may be released and the swing-pieces will be returned to their bearing upon the under side of the tapes.

A gong or alarm, 11, is attached upon one end of the shaft 0, and this is intended to be acted on by a hammer, 12, attached upon a shaft, 13, held in boxes 14 secured upon the plate A, and provided with a series of levers, 15, secured upon it in proper position to engage with the pins 16, inserted in the wheels D and D said pins 16 being in line with the figures upon said wheels. As the wheels are turned one place the pins 16 upon them engage with the projecting levers 15 and raise the hammer 12 attached to the shaft 13, and as the pins 16 are relieved from contact with these levers 15 the hammer 12 is thrown down into contact with the gong 11, and an alarm is sounded announcing to the operator that the work is done. A spiral spring, 17, wound around the shaft 13,'and compressed as the shaft 13 is rocked back, expands as the pins 16 are relieved from contact with the levers 15, and depresses the hammer upon the gong.

Having now set forth my invention, what I claim as new is 1. The combination, with a series of numbered wheels, D and D supported upon a shaft, (J, of the collars J and J provided with the slotted plates 1) and the ratchet-teeth spring-pieces X, provided with the pins Y, as

c, the numbered tapes 01' bands M, cams L, and for the purposes stated.

ears f, openings g, and pins h, substantially as and for the purpose set forth. JOHN LAWRENCE 2. The c0mbination,with thenumbered tapes In presence ofor bands M, of the shaft 0, spings 10, and shaft A. SIDNEY DoANE,

Q, handle T, forked levers S, shaft U, and FRAs. DOMINICK.

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