US1073294A - Extension and retraction device. - Google Patents

Extension and retraction device. Download PDF

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Publication number
US1073294A
US1073294A US61936111A US1911619361A US1073294A US 1073294 A US1073294 A US 1073294A US 61936111 A US61936111 A US 61936111A US 1911619361 A US1911619361 A US 1911619361A US 1073294 A US1073294 A US 1073294A
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United States
Prior art keywords
spindle
extension
tube
casing
retraction device
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Expired - Lifetime
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US61936111A
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Alexander Siewert
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Priority to US61936111A priority Critical patent/US1073294A/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
    • B66F3/16—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated actuated through bevel-wheel gearings
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32426—Plural distinct positions
    • Y10T403/32442—At least one discrete position
    • Y10T403/32451—Step-by-step adjustment
    • Y10T403/32459—Retainer extends through aligned recesses

Definitions

  • This invention relates to a' mechanism for the extension of telescoping masts and 'other extensible and retractable supports and lifting apparatuses.
  • masts and the like can be extended' by aid of a spindle the length of which need only ⁇ be a fraction of the height of the extended mechanism.
  • the telescopic parts b, Z2 and b are arranged in a casing c and their extension is effected by means of a spindle a revolubly supported ⁇ in the foot'of the casing, which spindle has a rather greater length than that of eachseparate tube. ⁇ -
  • the lower part of the spindle is without threading.
  • the tubes are provided at their lower end with internal threading, which Vwith the exception of the'innermost tube b is out of engagement with the spindle threading when the mast is retracted.
  • the rising telescopic part may not carry with it the other telescopic part surrounding it by aid of friction, there is passed through all the parts, with the exception of the innermost, a pin a3, the inner end of which is rounded ofi".
  • the rising tube presses this pin by means of its projection f ⁇ outward to the extent of the thickness of one tube and thereby liberates the tube immediately surrounding it.
  • the telescopic parts may have a circular or polygonal section, and the tube walls may be composed of net work.
  • the arrangement according to the present invention is adapted especially for the construction of jacks especially for automobiles for the purpose of which a corresponding diminution of the height dimensions must take place.
  • the spindle a instead of being revolubly supported in a casing c can be rigidly connected therewith and then by revolving this casing the spindle can be turned and thereby the extension of the telescopic parts be effected.
  • the casing c is' preferably supported by ball bearings upon a separate bed plate and moreover provided with spokes or with holes for the insertion of bars.
  • a device of the kind described comprising in combination an outer casing, a number of telescopic parts in said casing, .a screw spindle placed in the interior of said telescopic parts, means for rotating said screw spindle, a female screw at the bottom-end of each of saidtelescopic parts and adapted to engage the screw-threaded portion of said screwspindle, a spring-governed bolt at the upper end of each of said telescopic parts adapted to engage a hole in the adjacent inner telescopic part before the latter leaves the top of said screw-spindle, means for disengaging said spring-governed bolts when said telescopic parts are retracted, and a spring governed bolt connected with said casing
  • I have hereunto'signed and adapted to projectt-hrongh all sald telemy name this 23rd day of March 1911, in scopiopart-s with the exception of the innerthe presence of two subscribing witnesses.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Description

.gai
A. SIEWERT.
EXTENSION AND NBTRAQTION DBVIGB.
APPLICATION FILED APB. 6, 1911.
Fig. 2.
lll/[11111 A Laxman smwnar, or BERLIN, GERMANY.,
ExTENsI'oI; Np nnTnAcTIoN DEVICE.
To all whom t may concern:
Be it known that I, ALEXANDER SIEWERT,
` a subject of the King of Prussia, and residingatBernburgerstrasse 24-25 Berlin, Germany, have invented certain new and useful Improvements in Extension and Retraction Devices, of which the 'following is a yspecification.
This inventionrelates to a' mechanism for the extension of telescoping masts and 'other extensible and retractable supports and lifting apparatuses.
It consists in causing the separate telescoping parts provided with internal threading to be extended consecutively upona spindle placed in the interior of themechanism.
Apparatuses are already known in which platforms and the like are raised by turning spindles.A It'has` nevertheless not previously been possible to construct in `this manner masts and the like the length of which4 considerably exceeds twice the lengthv of the lifting spindle.- By the present invention, masts andthe like can be extended' by aid of a spindle the length of which need only `be a fraction of the height of the extended mechanism.
The invention is illustrated in the drawing in two figures, of which-'- Figure 1 is a longitudinal elevation, and Fig. 2 a section on the line A-.A of Fig-1.
The telescopic parts b, Z2 and b are arranged in a casing c and their extension is effected by means of a spindle a revolubly supported `in the foot'of the casing, which spindle has a rather greater length than that of eachseparate tube.`- The lower part of the spindle is without threading. The tubes :are provided at their lower end with internal threading, which Vwith the exception of the'innermost tube b is out of engagement with the spindle threading when the mast is retracted. On turning'the spindle a by .means of the threading e, first the innermost tube b is raised, until it strikes with an -annular projection f against the projection g'of the tube bsurrounding it. It then Carries this tube with it so that the matrix thereof engages with the spindle a and then leaves the spindle inasmuch as it has been bolted to the aforesaid tube Z2 by means of an automatic locking device. For this purpose, holes h are provided in V,the tubes, which coincide with one another when the l',Siieiileation ofy Letters Patent.
.application ma april a. 1'911.
Vlatam-.toa sept. 16. 1913.
Serial No. 618,361.
-lower projection f of the then inner tube of the tube surrounding it. On the tubesis placed in slot z' a pin 7c which is pressed into the coinciding holes I1, by a spring l as soon as the head of the pin lo has quitted the slot m.
In order that the rising telescopic part may not carry with it the other telescopic part surrounding it by aid of friction, there is passed through all the parts, with the exception of the innermost, a pin a3, the inner end of which is rounded ofi". The rising tube presses this pin by means of its projection f\ outward to the extent of the thickness of one tube and thereby liberates the tube immediately surrounding it. The telescopic parts may have a circular or polygonal section, and the tube walls may be composed of net work.
The arrangement according to the present invention is adapted especially for the construction of jacks especially for automobiles for the purpose of which a corresponding diminution of the height dimensions must take place.
The spindle a instead of being revolubly supported in a casing c can be rigidly connected therewith and then by revolving this casing the spindle can be turned and thereby the extension of the telescopic parts be effected. In this case the casing c is' preferably supported by ball bearings upon a separate bed plate and moreover provided with spokes or with holes for the insertion of bars. v
I-Iaving now particularly described and ascertained the nature of...my said invention and in whatmanner the same is to be performed, I declare that what I claim is:
A device of the kind described comprising in combination an outer casing, a number of telescopic parts in said casing, .a screw spindle placed in the interior of said telescopic parts, means for rotating said screw spindle, a female screw at the bottom-end of each of saidtelescopic parts and adapted to engage the screw-threaded portion of said screwspindle, a spring-governed bolt at the upper end of each of said telescopic parts adapted to engage a hole in the adjacent inner telescopic part before the latter leaves the top of said screw-spindle, means for disengaging said spring-governed bolts when said telescopic parts are retracted, and a spring governed bolt connected with said casing In witness whereof I have hereunto'signed and adapted to projectt-hrongh all sald telemy name this 23rd day of March 1911, in scopiopart-s with the exception of the innerthe presence of two subscribing witnesses.
most and to be pressed outward by the ris- ALEXANDER SIEWERT. 5 ing telescopic part to the extent of the thick- Witnesses:
ness of one of said telescopic parts, sub- HENRY HASPER,
stantially as set forth. WOLDEMAR HAUPT.
US61936111A 1911-04-06 1911-04-06 Extension and retraction device. Expired - Lifetime US1073294A (en)

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2662712A (en) * 1950-09-21 1953-12-15 Louis C Rose Telescopic mast
US2719016A (en) * 1951-04-13 1955-09-27 Howard E Wicks Aircraft landing gear
US2739673A (en) * 1952-05-26 1956-03-27 Everett J Foster Aerial masts
US2814099A (en) * 1953-04-29 1957-11-26 Donald M Knittel Combination jack and work stand
US2819938A (en) * 1953-12-16 1958-01-14 Alfred M Zerver Tool stand
US2908142A (en) * 1956-09-28 1959-10-13 De Long Corp Supporting leg assembly for marine platform
US2910883A (en) * 1958-02-06 1959-11-03 Jr Maurice T Reed Anti-friction force column
US2961837A (en) * 1956-09-28 1960-11-29 Delong Corp Supporting leg assembly for marine platform
US2984075A (en) * 1956-05-15 1961-05-16 De Long Corp Internal and external jack assembly for telescopic caissons
US2990587A (en) * 1959-03-20 1961-07-04 Fred Medart Mfg Co Power actuated movers for telescoping gymnasium seat-structures
US3011317A (en) * 1956-11-29 1961-12-05 Kerr Mc Gee Oil Ind Inc Submergible barge
US3064944A (en) * 1960-07-01 1962-11-20 West Michigan Steel Foundry Co Landing gear leg structure
US4023819A (en) * 1975-11-11 1977-05-17 Holman Jr Robert E Spring-loaded adjustable length cargo rod
US5282593A (en) * 1992-06-05 1994-02-01 Tri W-G, Inc. Adjustable leg
US5915877A (en) * 1997-06-04 1999-06-29 Quality Boat Lift, Inc. Positive drive boat lift
US6279860B1 (en) * 1999-09-07 2001-08-28 Brett A. Swanger Heat exchanger housing support
US20050247834A1 (en) * 2004-05-05 2005-11-10 Markus Thuelig Adjustable screw foot for appliances
US20130206948A1 (en) * 2010-08-05 2013-08-15 John Henry Pearson Locking System for Adjustable Telescopic Props
US9388545B1 (en) * 2013-01-30 2016-07-12 J. Thomas Wolner Device for raising and lowering a structure
US10278500B2 (en) * 2013-10-11 2019-05-07 Designerscope Limited Cabinet levelling apparatus
US11786035B2 (en) 2017-09-04 2023-10-17 Designerscope Limited Cabinet levelling apparatus

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2662712A (en) * 1950-09-21 1953-12-15 Louis C Rose Telescopic mast
US2719016A (en) * 1951-04-13 1955-09-27 Howard E Wicks Aircraft landing gear
US2739673A (en) * 1952-05-26 1956-03-27 Everett J Foster Aerial masts
US2814099A (en) * 1953-04-29 1957-11-26 Donald M Knittel Combination jack and work stand
US2819938A (en) * 1953-12-16 1958-01-14 Alfred M Zerver Tool stand
US2984075A (en) * 1956-05-15 1961-05-16 De Long Corp Internal and external jack assembly for telescopic caissons
US2908142A (en) * 1956-09-28 1959-10-13 De Long Corp Supporting leg assembly for marine platform
US2961837A (en) * 1956-09-28 1960-11-29 Delong Corp Supporting leg assembly for marine platform
US3011317A (en) * 1956-11-29 1961-12-05 Kerr Mc Gee Oil Ind Inc Submergible barge
US2910883A (en) * 1958-02-06 1959-11-03 Jr Maurice T Reed Anti-friction force column
US2990587A (en) * 1959-03-20 1961-07-04 Fred Medart Mfg Co Power actuated movers for telescoping gymnasium seat-structures
US3064944A (en) * 1960-07-01 1962-11-20 West Michigan Steel Foundry Co Landing gear leg structure
US4023819A (en) * 1975-11-11 1977-05-17 Holman Jr Robert E Spring-loaded adjustable length cargo rod
US5282593A (en) * 1992-06-05 1994-02-01 Tri W-G, Inc. Adjustable leg
US5915877A (en) * 1997-06-04 1999-06-29 Quality Boat Lift, Inc. Positive drive boat lift
US5957623A (en) * 1997-06-04 1999-09-28 Quality Boat Lifts Inc. Electrically insulated positive drive boat lift
US6279860B1 (en) * 1999-09-07 2001-08-28 Brett A. Swanger Heat exchanger housing support
US20050247834A1 (en) * 2004-05-05 2005-11-10 Markus Thuelig Adjustable screw foot for appliances
US7556227B2 (en) * 2004-05-05 2009-07-07 Miele & Cie. Kg Adjustable screw foot for appliances
US20130206948A1 (en) * 2010-08-05 2013-08-15 John Henry Pearson Locking System for Adjustable Telescopic Props
US8998159B2 (en) * 2010-08-05 2015-04-07 John Henry Pearson Locking system for adjustable telescopic props
US9388545B1 (en) * 2013-01-30 2016-07-12 J. Thomas Wolner Device for raising and lowering a structure
US10278500B2 (en) * 2013-10-11 2019-05-07 Designerscope Limited Cabinet levelling apparatus
US10765209B2 (en) 2013-10-11 2020-09-08 Designerscope Limited Cabinet levelling apparatus
US11786035B2 (en) 2017-09-04 2023-10-17 Designerscope Limited Cabinet levelling apparatus

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