GB225170A - Improvements in mechanical pencils - Google Patents
Improvements in mechanical pencilsInfo
- Publication number
- GB225170A GB225170A GB18180/24A GB1818024A GB225170A GB 225170 A GB225170 A GB 225170A GB 18180/24 A GB18180/24 A GB 18180/24A GB 1818024 A GB1818024 A GB 1818024A GB 225170 A GB225170 A GB 225170A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lead
- tip
- pencil
- ribs
- wahl
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K21/00—Propelling pencils
- B43K21/02—Writing-core feeding mechanisms
- B43K21/22—Writing-cores gripping means, e.g. chucks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K21/00—Propelling pencils
- B43K21/003—Propelling pencils with lead sections or lead cartridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K21/00—Propelling pencils
- B43K21/02—Writing-core feeding mechanisms
- B43K21/08—Writing-core feeding mechanisms with the writing-cores fed by screws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K21/00—Propelling pencils
- B43K21/02—Writing-core feeding mechanisms
- B43K21/08—Writing-core feeding mechanisms with the writing-cores fed by screws
- B43K21/085—Writing-core feeding mechanisms with the writing-cores fed by screws with a threaded propelling shank
Landscapes
- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Abstract
225,170. Wahl Co., (Assignees of Wahl, J. C.). Nov. 24, 1923, [Convention date]. Pencil holders. - In propelling pencils of the kind in which the lead is projected through a tip which is provided with internal ribs to support the lead and prevent it from rotating within the pencil, the ribbed end is of non-circular section and is of sufficient size to provide clearance spaces 11, Fig. 3, between the lead 7 and the inner wall of the tip intermediate of the ribs 10, enabling the dust produced by the ribs biting into the lead to escape at the end of tre tip. As shown in Fig. 2, the inner end of the tip 2 is provided with screw threads 9 to engage the threaded lower end of the lead guide 4 of a screw-propelling pencil 1.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US676703A US1606909A (en) | 1923-11-24 | 1923-11-24 | Mechanical pencil |
Publications (1)
Publication Number | Publication Date |
---|---|
GB225170A true GB225170A (en) | 1925-03-12 |
Family
ID=24715626
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18180/24A Expired GB225170A (en) | 1923-11-24 | 1924-07-30 | Improvements in mechanical pencils |
Country Status (5)
Country | Link |
---|---|
US (1) | US1606909A (en) |
CH (1) | CH112814A (en) |
DE (1) | DE426979C (en) |
GB (1) | GB225170A (en) |
NL (1) | NL17872C (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2638074A (en) * | 1948-09-03 | 1953-05-12 | Joseph Dixon Crucible Co | Mechanical pencil with spiral feeding means |
CH356372A (en) * | 1956-12-24 | 1961-08-15 | Staedtler Fa J S | Longitudinally slotted clamping pliers for pens |
US4919556A (en) * | 1988-01-15 | 1990-04-24 | Pencell Co., Ltd. | Writing implement having simplified lead-feeding mechanism |
US5791798A (en) * | 1995-05-19 | 1998-08-11 | Yu; Li Hua | Multi-purpose writing instrument |
US5944435A (en) * | 1997-11-03 | 1999-08-31 | Chai; David Ching-Her | Mechanical pencil structure |
-
0
- NL NL17872D patent/NL17872C/xx active
-
1923
- 1923-11-24 US US676703A patent/US1606909A/en not_active Expired - Lifetime
-
1924
- 1924-07-30 GB GB18180/24A patent/GB225170A/en not_active Expired
- 1924-08-04 CH CH112814D patent/CH112814A/en unknown
- 1924-08-08 DE DEW66787D patent/DE426979C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CH112814A (en) | 1925-12-01 |
NL17872C (en) | |
DE426979C (en) | 1926-03-23 |
US1606909A (en) | 1926-11-16 |
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