GB649406A - An improved safety cutting knife - Google Patents

An improved safety cutting knife

Info

Publication number
GB649406A
GB649406A GB2405748A GB2405748A GB649406A GB 649406 A GB649406 A GB 649406A GB 2405748 A GB2405748 A GB 2405748A GB 2405748 A GB2405748 A GB 2405748A GB 649406 A GB649406 A GB 649406A
Authority
GB
United Kingdom
Prior art keywords
blade
spring
pawl
handle
cutting pressure
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
Application number
GB2405748A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JAMES WALKER MORRIS
Dunlop Rubber Co Ltd
Original Assignee
JAMES WALKER MORRIS
Dunlop Rubber Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JAMES WALKER MORRIS, Dunlop Rubber Co Ltd filed Critical JAMES WALKER MORRIS
Priority to GB2405748A priority Critical patent/GB649406A/en
Publication of GB649406A publication Critical patent/GB649406A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B1/00—Hand knives with adjustable blade; Pocket knives
    • B26B1/08—Hand knives with adjustable blade; Pocket knives with sliding blade

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)

Abstract

649,406. Knives. DUNLOP RUBBER CO., Ltd., and MORRIS, J. W. Sept. 14, 1948, No. 24057. [Class 30] A safety knife comprises a blade, retractable by spring means into a cavity in the handle, holding and engaging means to maintain the blade outside the handle before and during the application of cutting pressure, respectively, and releasing means to release the engaging means so that the blade can be retracted. As shown the blade 1 is projected against the action of the spring 4 by a flick of the wrist and is held extended by the engagement of the pawl 12 of a pivoted escapement 11 with the tooth 5. When cutting pressure is applied the blade rotates slightly on the radiused edge of the handle 8 to disengage the tooth 5 and retract slightly to engage the pawl 13 which is brought into position by pressure of the blade on the shoulder 14. When cutting pressure is removed the spring 16 rotates the escapement to disengage the pawl 13 and the blade, which is retracted by the spring 4.
GB2405748A 1948-09-14 1948-09-14 An improved safety cutting knife Expired GB649406A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2405748A GB649406A (en) 1948-09-14 1948-09-14 An improved safety cutting knife

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2405748A GB649406A (en) 1948-09-14 1948-09-14 An improved safety cutting knife

Publications (1)

Publication Number Publication Date
GB649406A true GB649406A (en) 1951-01-24

Family

ID=10205681

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2405748A Expired GB649406A (en) 1948-09-14 1948-09-14 An improved safety cutting knife

Country Status (1)

Country Link
GB (1) GB649406A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755893A (en) * 1971-02-27 1973-09-04 K Nagaki Electrician{40 s knife
EP0244517A1 (en) * 1984-12-20 1987-11-11 British Textile Technology Group Improved knife
EP0252711A1 (en) * 1986-07-08 1988-01-13 British Textile Technology Group Safety knife
US5203085A (en) * 1992-01-02 1993-04-20 Martor-Argentax E.H. Beermann Kg Knife
US8250764B2 (en) 2007-04-16 2012-08-28 Adco Industries-Technologies, L.P. Adjustable utility knife
US8307556B2 (en) 2009-06-19 2012-11-13 ADCO Industries—Technologies, L.P. Utility cutter
US8782909B1 (en) 2013-02-12 2014-07-22 ADCO Industries—Technologies, L.P. Utility cutter

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755893A (en) * 1971-02-27 1973-09-04 K Nagaki Electrician{40 s knife
EP0244517A1 (en) * 1984-12-20 1987-11-11 British Textile Technology Group Improved knife
EP0252711A1 (en) * 1986-07-08 1988-01-13 British Textile Technology Group Safety knife
US4949458A (en) * 1986-07-08 1990-08-21 The Shirley Institute Knife
US5203085A (en) * 1992-01-02 1993-04-20 Martor-Argentax E.H. Beermann Kg Knife
EP0549847A1 (en) * 1992-01-02 1993-07-07 MARTOR-ARGENTAX E.H. Beermann KG Knife having a blade holder which is guided for longitudinal displacement
US8250764B2 (en) 2007-04-16 2012-08-28 Adco Industries-Technologies, L.P. Adjustable utility knife
US8561305B2 (en) 2007-04-16 2013-10-22 ADCO Industries—Technologies, L.P. Adjustable utility knife
US8307556B2 (en) 2009-06-19 2012-11-13 ADCO Industries—Technologies, L.P. Utility cutter
US8931180B2 (en) 2009-06-19 2015-01-13 ADCO Industries—Technologies, L.P. Utility cutter
US8782909B1 (en) 2013-02-12 2014-07-22 ADCO Industries—Technologies, L.P. Utility cutter
US9346483B2 (en) 2013-02-12 2016-05-24 Adco Industries-Technologies, L.P. Utility cutter
US9650065B2 (en) 2013-02-12 2017-05-16 Adco Industries - Technologies, L.P. Utility cutter

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