GB161303A - Improvements in ratchet jacks - Google Patents

Improvements in ratchet jacks

Info

Publication number
GB161303A
GB161303A GB100120A GB100120A GB161303A GB 161303 A GB161303 A GB 161303A GB 100120 A GB100120 A GB 100120A GB 100120 A GB100120 A GB 100120A GB 161303 A GB161303 A GB 161303A
Authority
GB
United Kingdom
Prior art keywords
lifting
pawl
bar
spring
holding
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
GB100120A
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.)
DUFF Manufacturing CO
Original Assignee
DUFF Manufacturing CO
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 DUFF Manufacturing CO filed Critical DUFF Manufacturing CO
Priority to GB100120A priority Critical patent/GB161303A/en
Publication of GB161303A publication Critical patent/GB161303A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F1/00Devices, e.g. jacks, for lifting loads in predetermined steps
    • B66F1/02Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts
    • B66F1/04Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts the posts being toothed
    • B66F1/06Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts the posts being toothed and the devices being actuated mechanically

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Forging (AREA)

Abstract

161,303. Percival, S., (Duff Manufacturing Co.). Jan. 12, 1920. Jacks.-In a ratchet-jack mechanism of the type comprising holding and lifting pawls connected by a band spring, the spring is formed as an open bow with the intermediate portion of its back having a depression for co-operation with a reversing-lever, and the casing is made in two forged metal parts. The lifting-bar 41 is operated step by step by a lifting-pawl 51 pivoted on the end of the operating-handle 49. and held between the steps by a holding- pawl 52 connected with the lifting- pawl by a spring 58. The nose 64 of a reversing-lever 62 is pressed into a notch 61 in the spring, when raising, both pawls being thereby pressed against the ratchet teeth, and each downward movement of the handle 49 raises the lifting-bar through one step, the holding-pawl then retaining the bar whilst raising the handle. The nose of the reversing-lever is disengaged from the spring when lowering. During the lowering movement of the lifting- bar the spring is in tension and causes first the engagement of the holding-pawl with the ratchet tooth above that previously engaged, and then, when the load is on the holding pawl, the disengagement of the lifting-pawl. As the lifting-pawl is raised, the spring comes into compression and engages the lifting pawl with the next tooth. The lifting-bar is provided with an upper lifting-head 43 and a lever toe-lift bar 46 adapted to be attached in various positions on the lifting-bar. The ratchet mechanism is contained in the parts 5, 6, and the lifting-bar in the parts 4 of the casing.
GB100120A 1920-01-12 1920-01-12 Improvements in ratchet jacks Expired GB161303A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB100120A GB161303A (en) 1920-01-12 1920-01-12 Improvements in ratchet jacks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB100120A GB161303A (en) 1920-01-12 1920-01-12 Improvements in ratchet jacks

Publications (1)

Publication Number Publication Date
GB161303A true GB161303A (en) 1921-04-12

Family

ID=9714406

Family Applications (1)

Application Number Title Priority Date Filing Date
GB100120A Expired GB161303A (en) 1920-01-12 1920-01-12 Improvements in ratchet jacks

Country Status (1)

Country Link
GB (1) GB161303A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR20160100046A (en) * 2016-02-08 2017-10-23 Σταυρος Κυριακου Κιζηρογλου A tool for the easy making of bed

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR20160100046A (en) * 2016-02-08 2017-10-23 Σταυρος Κυριακου Κιζηρογλου A tool for the easy making of bed
GR1009787B (en) * 2016-02-08 2020-08-03 Σταυρος Κυριακου Κιζηρογλου A tool for the easy making of bed

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