US176833A - Improvement in adding-machines - Google Patents
Improvement in adding-machines Download PDFInfo
- Publication number
- US176833A US176833A US176833DA US176833A US 176833 A US176833 A US 176833A US 176833D A US176833D A US 176833DA US 176833 A US176833 A US 176833A
- Authority
- US
- United States
- Prior art keywords
- wheel
- machines
- improvement
- keys
- pawls
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 241000025994 Euchone Species 0.000 description 2
- 210000003813 Thumb Anatomy 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06C—DIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
- G06C7/00—Input mechanisms
- G06C7/02—Keyboards
- G06C7/08—Keyboards with one set of keys for all denominations, e.g. ten-key board
Definitions
- Figure l is a sectional elevation of my improved machine taken on line w a? of Fig. 2.
- Fig. 2 is it sectional elevation taken on line y y of Fig. 1.
- Fig. 3 is a sectional elevation taken on line z z ot' Fig. 2; ztnd'Fig. 4is a top view.
- A represents the keys, which are arranged in two rows -ucross the top of the case B, to pass down the trendle U for working the wheel D by the pawl E, which is so genred with the wheel as to turn it half the movement when pressed down by a key, and the other halt' when raised up by the spring F.
- the full stroke of the treadle turns the wheel ten teeth, or once around, and shorter strokes in proportion to their length.
- the keys are constructed as to length, and connect by adjusting-screws Gr, so that when the knobs H are pushed down to the top of the case they turn the wheel the number of teeth eorresponding to the number of the key.
- a, piu, N ou the lower wheel pushes pin O of pawl P out of the notch of the higher wheel by acting on stud Q ot' the pztwl, and, when pin N passes, the stud spring -R pulls the pnwl back, and the pawl sets the wheel around one number by the pusher S.
- the sliding rol T and the pivoted blocks U disconnect the puwls P-when the wheels are to be set back to zero, which is done by turniug them by the thunb-kuob V, the ratchet E atllowing wheel D to turn back readily.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Water Treatment By Sorption (AREA)
- Developing Agents For Electrophotography (AREA)
Description
D. CARROLL.
ADDING-MACHINE.
Patenta& May &1875.
ATTOBNEYS.
WASHINGTDN D C WITNESSES UNITED STATES PATENT OFFICE,
DAVID OARROLL, OF SPRING GREEK, PENNSYLVANIA.
IMPROVEMENT IN ADDlNG-MACHINES.
Specitication forming part of Letters Patent No. !76,833, eted May 2, 1876; application filed February 28, 1876.
one by the thumb, and also rranged so that euch one turns the unit-wheel the number of figures that it stands for.
Figure l is a sectional elevation of my improved machine taken on line w a? of Fig. 2. Fig. 2 is it sectional elevation taken on line y y of Fig. 1. Fig. 3 is a sectional elevation taken on line z z ot' Fig. 2; ztnd'Fig. 4is a top view.
Similar letters ofreference indicate corresponding parts.
A represents the keys, which are arranged in two rows -ucross the top of the case B, to pass down the trendle U for working the wheel D by the pawl E, which is so genred with the wheel as to turn it half the movement when pressed down by a key, and the other halt' when raised up by the spring F. The full stroke of the treadle turns the wheel ten teeth, or once around, and shorter strokes in proportion to their length. The keys are constructed as to length, and connect by adjusting-screws Gr, so that when the knobs H are pushed down to the top of the case they turn the wheel the number of teeth eorresponding to the number of the key.
To prevent the wheel D from turning too far, there ere stop-pawls I, which engage ratchetwheel J at the moment the pawl E stops in the downwa rd movement, said pawls being worked bythe treadles K L, one of which is worked by one row of keys, and one by the other.
' To turn the higher wheels by the lower ones, a, piu, N, ou the lower wheel pushes pin O of pawl P out of the notch of the higher wheel by acting on stud Q ot' the pztwl, and, when pin N passes, the stud spring -R pulls the pnwl back, and the pawl sets the wheel around one number by the pusher S. The sliding rol T and the pivoted blocks U disconnect the puwls P-when the wheels are to be set back to zero, which is done by turniug them by the thunb-kuob V, the ratchet E atllowing wheel D to turn back readily.
Having thus described my invention, I claim as new and desire to secure by Letters Patentl. The combinution of the double ratchetbar E, spring F, treadle G, and screws Gr with the double series of keys A and the numberwheel D, having :t spur-wheel on its sha't, as and for the purpose set forth.
2. The combinzttion of the independent treadles K L and the stop-pawls I, with the double series of keys and the rutchet of the numberwheel D, us and for the purpose set forth.
3. The sliding rod T and the pivoted bloeks U, in combination with the pawls P, substantially as specified.
DAVID GARROLL.
Witnesses:
E. R. WILKINs, S. D. GREEN.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US176833A true US176833A (en) | 1876-05-02 |
Family
ID=2246240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US176833D Expired - Lifetime US176833A (en) | Improvement in adding-machines |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US176833A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2590345A (en) * | 1952-03-25 | Differential actuating mechanism | ||
| US3231191A (en) * | 1963-03-04 | 1966-01-25 | Rockwell Mfg Co | Counter apparatus |
-
0
- US US176833D patent/US176833A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2590345A (en) * | 1952-03-25 | Differential actuating mechanism | ||
| US3231191A (en) * | 1963-03-04 | 1966-01-25 | Rockwell Mfg Co | Counter apparatus |
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