GB254721A - Improvements in or relating to sheet-perforating apparatus - Google Patents
Improvements in or relating to sheet-perforating apparatusInfo
- Publication number
- GB254721A GB254721A GB16416/26A GB1641626A GB254721A GB 254721 A GB254721 A GB 254721A GB 16416/26 A GB16416/26 A GB 16416/26A GB 1641626 A GB1641626 A GB 1641626A GB 254721 A GB254721 A GB 254721A
- Authority
- GB
- United Kingdom
- Prior art keywords
- key
- tooth
- punches
- punching
- wheel
- 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
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K1/00—Methods or arrangements for marking the record carrier in digital fashion
- G06K1/02—Methods or arrangements for marking the record carrier in digital fashion by punching
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
254,721. British Tabulating Machine Co., Ltd., (Assignees of Mills A. W.). July 1, 1925, [Convention date]. Selective punching-machines. - A punching- machine with cam-operated keyboard-selected punches has means for positively retracting the punches. Each of a bank of pivoted key levers 24 carries a spring-urged pawl 18, co-operating with a lug 17 on a member 14, connected to its punch 10 by a bell-crank 13, and carrying a tooth 19 engaging a constantly rotated toothed wheel 30. Depression of a key lowers the tooth 19 and the member 14 is moved to the right, Fig. 4, to effect punching. A lug 15 at the same time turns a bail 16 which through a projection 35 actuates a member 33 cammed by pins 40 to interpose a tooth 36 into the path of the wheel 30. The member 33 is then moved to the left by the wheel to turn the bail 16 and withdraw the punches. If a key is held depressed a cam 21 raises the end 20 of the member 14 and the parts are held inoperative until the key is released.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US40714A US1845001A (en) | 1925-07-01 | 1925-07-01 | Punch action |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB254721A true GB254721A (en) | 1927-09-30 |
Family
ID=21912518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16416/26A Expired GB254721A (en) | 1925-07-01 | 1926-06-30 | Improvements in or relating to sheet-perforating apparatus |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1845001A (en) |
| FR (1) | FR617136A (en) |
| GB (1) | GB254721A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3394882A (en) * | 1966-10-31 | 1968-07-30 | Ncr Co | Card punch mechanism |
-
1925
- 1925-07-01 US US40714A patent/US1845001A/en not_active Expired - Lifetime
-
1926
- 1926-06-07 FR FR617136D patent/FR617136A/en not_active Expired
- 1926-06-30 GB GB16416/26A patent/GB254721A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1845001A (en) | 1932-02-16 |
| FR617136A (en) | 1927-02-14 |
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