US258556A - Lifting-jack - Google Patents

Lifting-jack Download PDF

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Publication number
US258556A
US258556A US258556DA US258556A US 258556 A US258556 A US 258556A US 258556D A US258556D A US 258556DA US 258556 A US258556 A US 258556A
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US
United States
Prior art keywords
screw
jack
lifting
parts
sleeve
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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Publication of US258556A publication Critical patent/US258556A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, 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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S254/00—Implements or apparatus for applying pushing or pulling force
    • Y10S254/03—Jack handles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/15—Intermittent grip type mechanical movement
    • Y10T74/1558—Grip units and features
    • Y10T74/156—Compound movement handle
    • Y10T74/1561—Reversible
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/15—Intermittent grip type mechanical movement
    • Y10T74/1558—Grip units and features
    • Y10T74/1565—Gripper releasing devices
    • Y10T74/1566—Power pawl lifter

Definitions

  • This invention consists in certain construe tive features applicable to screw lifting-jacks, as will hereinafter more fully appear.
  • Figure 1 is a side view, with parts removed, of my invention as applied to screw lifting-jacks.
  • Fig. 2 is a detail sectional plan at line as .r, Fig.1, ot' the device for rotating the screw.
  • Fig. 3 is a detail section at I I -l1ne a0 00,F1g. 1.
  • the operating-screw is formed with right and left hand screw-threaded portions A B, which screw into the respective screw-th readed pieces 0 D. These pieces are cast with their screw-threads in two parts, which are afterward riveted or bolted together, as clearly indicated in Fig. 3.
  • E is a gear-wheel, slightly beveled, arranged on the shank of the operating-screw, the teeth 6 of which are engaged by one or more teeth, f,
  • the teethfcan be moved down outof engagement with the gear-wheel E in the back motion of the sleeve F and moved up into engagement in the forward motion of the same when it is desired to force the parts 0 D apart, and vice versa in drawing the parts 0 D together.
  • the sleeve F is provided with an eye or hollow extension, F, for the reception of an operating-lever.

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

Description

(No Model.)
J. CHURCH.
LIPTING JACK.
INVENTORZ ATTEST:
N, PETERS, Phoiuiilhngnphcn Washinglfll. I7. I;
' UNTTED STATES PATENT GFFIQE.
JAMES CHURCH, OF ST. LOUIS, MISSOURI.
LIFTlNG-JACK.
SPECIFICATION forming part of Letters Patent No. 258,556, dated May 30, 1852.
Application filed April 30, 1880. (No model.)
To all whom it may concern.-
Be it known that I, JAMES Cannon, of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Lit'ting-Jacks; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon. I
This invention consists in certain construe tive features applicable to screw lifting-jacks, as will hereinafter more fully appear.
In the drawings, Figure 1 isa side view, with parts removed, of my invention as applied to screw lifting-jacks. Fig. 2 is a detail sectional plan at line as .r, Fig.1, ot' the device for rotating the screw. Fig. 3 is a detail section at I I -l1ne a0 00,F1g. 1. I
The operating-screw is formed with right and left hand screw-threaded portions A B, which screw into the respective screw-th readed pieces 0 D. These pieces are cast with their screw-threads in two parts, which are afterward riveted or bolted together, as clearly indicated in Fig. 3.
E is a gear-wheel, slightly beveled, arranged on the shank of the operating-screw, the teeth 6 of which are engaged by one or more teeth, f,
of a tilting sleeve, F, which surrounds the construction forms a cheap and effective ratchet device for rotating the screws, avoiding as it does the use of separate pawls, springs, &c., usually required to effect the purpose.
In use the teethfcan be moved down outof engagement with the gear-wheel E in the back motion of the sleeve F and moved up into engagement in the forward motion of the same when it is desired to force the parts 0 D apart, and vice versa in drawing the parts 0 D together. The sleeve F is provided with an eye or hollow extension, F, for the reception of an operating-lever.
I elaim 1. The operating-screw provided with gearwheel E, in combination with a tilting sleeve or lever, F, having one or more teetl1,f, as and for the purpose set forth.
2. The combination ofoperating-screws A B, parts 0 D, gear-wheel E, tilting sleeve F, and trethf, as and for the purpose set forth.
In testimony of said invention I have hereunto set my hand. 7 JAMES CHURCH.
In presence of- ROBERT BURNS, L. O. MoRsE.
US258556D Lifting-jack Expired - Lifetime US258556A (en)

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US258556A true US258556A (en) 1882-05-30

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