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Publication numberUS3575368 A
Publication typeGrant
Publication dateApr 20, 1971
Filing dateJan 27, 1969
Priority dateJan 27, 1969
Publication numberUS 3575368 A, US 3575368A, US-A-3575368, US3575368 A, US3575368A
InventorsWiliam E M Jones, Bernard Miller, Eugene P Thomas
Original AssigneeWestinghouse Electric Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Vertically adjustable counterbalancing x-ray tube head suspension support apparatus
US 3575368 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

United States Patent Inventors Eugene P. Thomas Baltimore, Md.; William E. M. Jones; Bernard Miller, Pittsburgh, Pa.

Appl. No. 794,204

Filed Jan. 27, 1969 Patented Apr. 20, 1971 Assignee Westinghouse Electric Corporation Pittsburgh, Pa.

VERTICALLY ADJUSTABLE COUNTERBALANCING X-RAY TUBE HEAD SUSPENSION SUPPORT APPARATUS 8/1939 Haupt 248/123 5/1949 Berggren... 248/123 5/1950 Lofstrand 248/123 3/1959 Foderaro 248/334 8/1959 Stava et al. 248/123 FORElGN PATENTS 6/1942 France 248/123 Primary ExaminerMarion Parsons, Jr. Attorneys-F. H. Henson, D. F. Straitiff and E. P. Klipfel ABSTRACT:

Described is a vertically adjustable counterbalancing suspension support apparatus embodied in a floor mounted mobile X-ray tube column. The exemplified load, an X-ray tube head, is mounted on a vertical carriage movable along a mobile-based column containing an elongated circumfcrentially-encased helical compression spring extending vertically therein for counterbalancing the tube head and carriage. A dual suspension cable arrangement transmits the carriage load to the lower and live end of the compression spring via respective spring-pickupcompensating fusees at the top of the column and a pair of spring-travel-reducing pulley arrangements at such live end. A combined connects the support cables to the loaded carriage.

tension-equalizing-and-safety-lock member Patented; :April 20, 1971 3,575,368

WITNESSES INVENTORS Eugene P. Thomas, William EM. Jones, 4 and Bernard Miller.


Vertically adjustable counterbalancing suspension support apparatus for devices, instruments, or the like, such as X-ray tube heads, mounted for guided travel vertically.

2. Description of the Prior Art:

Vertically adjustable counterbalancing suspension support apparatus employing flexible suspension cables for support of relatively heavy items such as X-ray tube heads mounted on vertical columns often are characterized by considerable bulk, complexity, and/or weight resultant from the nature of the construction of such apparatus under requirement for a high degree of assurance against failure of the apparatus to maintain support of the load over a prolonged period of time.

SUMMARY The present invention, is suspending the vertically adjustable load-bearing carriage or mounting means by a pair of cables, either of which alone is capable of supporting such loaded carriage, together with inclusion of a safety lock for the carriage which is effectuated responsively to loss of support by either cable, fail-safe operation of the support apparatus with respect to suspension cable failure is assured. By virtue of employment of a single elongated helical compression spring in conjunction with fusees for counterbalancing the loadbearing carriage, the weight of the apparatus can be made significantly less than where a counterweight means is employed. By virtue of circumferential encasement of the compression spring, its reliability is assured against separation at any of its turns and a degree of simplicity relative to use of a plurality of parallel-arranged tension springs is afforded. And, by virtue of connecting the cables to the live end of the compression spring via jockey pulleys, the travel required for spring compression is one-half that of the load-bearing carriage, thus affording use of a relatively short spring and thereby contributing to a saving in space requirement for such spring.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a side elevation view, partly in outline and partly in section, of a floormounted mobile X-ray column embodying the invention;

FIG. 2 is a front elevation view of the portion of the apparatus within the dot-dash circle A in FIG. ll;

FIG. II is a front elevation view of the portion of the apparatus within the dot-dash circle B in FIG. I; and

FIG. I is a front elevation view of the portion of the apparatus within the circle C in FIG. I.

DESCRIPTION OF THE PREFERRED EMBODIMENT The preferred embodiment of the invention is exemplified in conjunction with a floor mounted mobile Xray column 5 projecting vertically from a wheel-supported base 7, as shown in FIG. I. The column 5 is constructed of metal, is hollow, and of generally rectangular cross section, with oppositely-facing guide channels 9 formed therein which extend along its length for directing vertical movement of a tube head carriage 112 via carriage rollers Ml disposed in such channels. For suspension support of the carriage I2, one end of a spaced-apart pair of flexible plastic-covered aircraft cables 116 about one-eighth inch in diameter, only one of which is shown in FIG. I, are anchored to the tube head carriage I2 via a combined tensionequalizing and safety lock member lb extending between the guide channels, as shown in FIG. 2. These support cables I6 in turn extend upwardly along the carriage guide channels 9, across respective relatively wide cable guide pulleys on the column 5 onto the spiral grooves of respective fusees 22. thence around multigrooved drums 24 affixed to the fusees, thence downwardly within the column around a pair of respective jockey pulleys 26 coupled to a lower and live end of a helical compression spring 28 within the column, and then upwardly through such spring to cable anchors 30 at the top of the column.

The compression spring 28 is cylindrical and encased about its periphery in a hollow tubular spring housing member 32 attached at its lower end to the wheel-supported base 7 at the bottom of the column 5. An inwardly-extending annular stop member 34 affixed to the upper end of the spring housing member 32 forms a shoulder against which the upper end of the compression spring 28 abuts, and the outer periphery of such spring is in slidable engagement with the inner surface of such housing member.

Referring to FIGS. l and 4, jockey pulleys 26 are rotatably carried between the arms 36 of a clevis 38 on a common shaft III, and the clevis has a thrust transmitting rotary connection with the upper end of a threaded spring adjustment screw 42 via a swivel member 44. The adjustment screw in turn extends centrally through and is in screw-threaded connection with a disc-shaped thrust member 46 which abuts the lower end of the compression spring 28.

In normal operation of the apparatus, in any given vertical position of the carriage 12, the degree of compression of the spring 28 commensurate with such position creates a tension in the cables I6 which is transmitted to the carriage via the drums 24 and fusees 22 adequate to suspend such carriage and its tube head 50 load. As the tube head carriage 12 is moved downwardly, the cables 16 will unwind from the fusees 22 and leave same at progressively decreasing diameter portions of the spiralling fusee grooves as the cables wind upwardly onto the drums 24 and pull the lower end of the compression spring 28 upwardly via the jockey pulleys 26 an amount equal to onehalf the downward travel of the carriage. Such increased longitudinal compaction of the spring 28 increases tension of the cable portions passing around the pulleys 26 and winding onto the drums 24. Such increased tension, however, in accord with the well-known characteristics of fusees, is compensated for by the fusees 22 which maintain tension of the cables playing out from such fusees constant and collectively equal to the load imposed thereon by the carriage I2 and its load 50. When the tube head carriage 12 is moved upwardly, the cables I6 will wind onto progressively larger diameter portions of the fusees 22 as a result of the compression spring 28 unwinding the cables 16 from the drums 24 attached to such fusees, and the resultant diminished spring force is compensated for by the fusees to maintain the counterbalancing support of the tube head carriage l2, and its load 50. It will be understood that the fusees 22 and the drums 24 attached thereto are so constructed and arranged as to accept storage of the cable lengths necessary to accommodate vertical travel of the carriage I2 for substantially the entire length of the column 5, and that the cables I6 are suitably secured against slippage on the fusees and drums.

In accord with a feature of the invention, the combined tension-equalizing and safety lock member 18 via which the cables I6 are connected to the tube head carriage I2 is simply in the form of a substantially flat metal plate, FIG. 2, which is pivotally connected at 52 near its top edge midway between its ends which are tapered downwardly, as viewed in the drawing, to relatively sharp edges 54 that are disposed with slight clearance adjacent to the sidewalls 56 of the carriage guide channels 9 at the forward edges of the column 5. During normal operation of the apparatus, with both cables I6 intact, the member llfl is free to tilt slightly about its pivotal connection 52 with the carriage 12 in the presence of a moderate degree of difference in cable lengths which are anchored to such member equal distances at opposite sides of such pivotal connection. However, the member 18 is so proportioned that the distance from the pivotal connection 52 to either sharp edge 54 is greater than the distance from such pivotal connection to either guide channel wall 56, so that upon separation of one of the cables 16, the torque reaction between the horizontally constrained vertically movable pivotal connection 52 and the nonscparated one of the cables causes the member 18 to turn about such connection and bring the corresponding sharp edge 54 of the member into locking engagement with the respective guide channel wall 56 and prevent the carriage l2 and its load 50 from being lowered, even though the remaining intact cable is capable of alone supporting the load and affording opportunity for raising the carriage. Such lockout against downward movement serves as indication of the existence of a faulty cable in a manner that requires attention before the apparatus can be operated in a useful manner.

We claim:

1. A vertically adjustable counterbalancing X-ray tube head suspension support apparatus, comprising:

an X-ray tube head to be positioned selectively at different elevations;

a floor-mounted hollow vertical column of rectangular cross section having oppositely facing horizontally spacedapart exterior guide channels extending lengthwise along its one rectangular side at respective edges thereof;

a vertical carriage supporting said X-ray tube head and having rollers thereon in rolling contact with said guide channels;

a pair of fusees and respective attached drums disposed within said column near its top for rotation about fixed horizontal axes;

a tubular spring housing member fixed relative to said column and extending upwardly therewithin;

an inwardly extending stop member affixed to the upper end of said spring housing member;

an elongated helical compression spring disposed in said spring housing member with its upper end abutting said stop member;

a pair of pulleys disposed within said helical compression spring in upwardly exerting thrust-transmitting connection to its lower end;

a pair of parallel-arranged flexible cables anchored at their one end to said column above said spring housing member, extending downwardly therefrom to and around said pulleys, thence upwardly to and around the respective drums and fusees in continuously wound relationship, thence downwardly to said carriage; and

an elongated horizontal rockable member extending laterally between said guide channels, having opposite pointed ends normally disposed in proximity to walls of said guide channels extending perpendicular of said member, pivotal suspended connections with said cables at opposite sides of its mid length, and a laterally constrained pivotal support connection with said carriage at a location separated from such pointed ends a distance greater than the mid distance between such perpendicular guide channel walls.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US311224 *Mar 4, 1884Jan 27, 1885 Extension-lamp
US2168209 *Jul 16, 1937Aug 1, 1939Kelley Koett Mfg Company IncSpring counterbalance
US2471998 *Jul 2, 1946May 31, 1949Hartford Nat Bank & Trust CoColumn-stand for supporting apparatus vertically movable along the column, particularly x-ray apparatus
US2506228 *Aug 16, 1946May 2, 1950Lofstrand Sr Anders RCounterbalance for glassware washing machines
US2876362 *Sep 10, 1956Mar 3, 1959Picker X Ray Corp Waite MfgCompensating cam and spring balance for x-ray devices
US2901202 *Dec 3, 1954Aug 25, 1959Picker X Ray Corp Waite MfgCounter balance
FR875227A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3895770 *Jul 16, 1973Jul 22, 1975Olympus Optical CoWeight balancing mechanism for use in precision elevating and lowering means
US4685648 *May 17, 1985Aug 11, 1987Bausch & Lomb IncorporatedCounterbalancing apparatus for use in an optical instrument
US4802198 *Mar 24, 1986Jan 31, 1989Siemens AktiengesellschaftX-ray equipment support apparatus
US4807272 *Mar 28, 1986Feb 21, 1989Siemens AktiengesellschaftX-ray equipment support apparatus
US4943020 *Sep 9, 1988Jul 24, 1990Schlumberger Technologies, Inc.Manipulator apparatus
US4953256 *Feb 6, 1989Sep 4, 1990Raytheon CompanyCounterbalance mechanism
US4973015 *Sep 9, 1988Nov 27, 1990Schlumberger Technologies, Inc.Manipulator apparatus for test head support and orientation
US5033710 *Jun 5, 1990Jul 23, 1991Michael AntoniadisApparatus for holding and operating a hand-held tool
US5037059 *Jun 16, 1989Aug 6, 1991Kabushiki Kaisha ToshibaX-ray diagnostic device with safe and durable X-ray tube suspension mechanism
US5114109 *Oct 2, 1991May 19, 1992Htg High Tech Geratebau GmbhTelescopically extensible lifting column, in particular for the height adjustment of a camera
US6382436 *Sep 28, 2000May 7, 2002Wen-Tsan WangDisplay rack
US6766996 *Jul 15, 2002Jul 27, 2004Reid-Ashman Manufacturing, Inc.Manipulator
US6997422Aug 20, 2003Feb 14, 2006Ergotron, Inc.Stand
US7195216 *Dec 10, 2004Mar 27, 2007Gemmy Industries CorporationAdjustable trunk for an artificial Christmas tree
US7252277Jan 17, 2004Aug 7, 2007Ergotron, Inc.Support arm
US7506853Nov 3, 2004Mar 24, 2009Ergotron, Inc.Methods and apparatus for generating force and torque
US7658359Dec 16, 2005Feb 9, 2010Steelcase Development CorporationLoad compensator for height adjustable table
US7887014 *Mar 19, 2009Feb 15, 2011Ergotron, Inc.Stand system and method
US8091841 *Dec 16, 2005Jan 10, 2012Steelcase Inc.Load compensator for height adjustable table
US8228668Jul 26, 2007Jul 24, 2012Ergotron, Inc.Balanced moment lift system and method
US8262047Dec 2, 2010Sep 11, 2012Ergotron, Inc.Stand with panning base
US8267360 *Mar 6, 2009Sep 18, 2012Qisda CorporationHeight adjustable holding apparatus
US8286927 *Apr 7, 2010Oct 16, 2012Ergotron, Inc.Lift mechanism systems and methods
US8464586 *Mar 12, 2010Jun 18, 2013Quanta Computer Inc.Vibration wave output instrument and method of using the same
US8757580 *Nov 9, 2010Jun 24, 2014Tever Technik GmbH & Co. KG.Height-adjustable pedestal
US8783639Aug 7, 2012Jul 22, 2014Ergotron, Inc.Stand system and method
US8925154Nov 23, 2011Jan 6, 2015Ergotron, Inc.Pivot mechanism for adjusting a position of an electronic display
US8967560Jul 26, 2011Mar 3, 2015Ergotron, Inc.Cam balance mechanism systems and methods
US9038549Mar 14, 2013May 26, 2015Humanscale CorporationHeight adjustable table
US9046213 *Nov 12, 2012Jun 2, 2015Ming-Hsien HuangLifting device
US9080721Jul 24, 2014Jul 14, 2015Ergotron, Inc.Display positioning apparatus and method
US9188275Nov 11, 2011Nov 17, 2015Ergotron, Inc.Edge mount positioning apparatus, system, and method
US9222616Mar 15, 2013Dec 29, 2015Ergotron, Inc.Counterbalancing lift mechanisms and methods
US9267639Jun 25, 2015Feb 23, 2016Ergotron, IncLift mechanism systems and methods
US9332836Mar 19, 2015May 10, 2016Humanscale CorporationHeight adjustable table
US9360152Dec 27, 2013Jun 7, 2016Ergotron, Inc.Lift mechanism systems and methods
US9470357Jul 9, 2015Oct 18, 2016Ergotron, Inc.Display positioning apparatus and method
US9581285Mar 2, 2015Feb 28, 2017Ergotron, Inc.Cam balance mechanism systems and methods
US9591920Jan 8, 2015Mar 14, 2017Steelcase Inc.Load compensator for height adjustable table
US9687073Feb 10, 2016Jun 27, 2017Ergotron, Inc.Lift mechanism systems and methods
US9700136Apr 7, 2016Jul 11, 2017Humanscale CorporationHeight adjustable table
US9717329Apr 21, 2016Aug 1, 2017Ergotron, Inc.Display positioning apparatus and method
US9718659 *May 18, 2015Aug 1, 2017Ming-Hsien HuangLifting device
US9743757Apr 13, 2015Aug 29, 2017Ergotron, Inc.Edge mount positioning apparatus, system, and method
US20040035989 *Aug 20, 2003Feb 26, 2004Sweere Harry C.Stand
US20040245419 *Jan 17, 2004Dec 9, 2004Sweere Harry C.Support arm
US20040250635 *Mar 3, 2004Dec 16, 2004Sweere Harry C.Lift mechanism based on torque equalization principles
US20050034547 *Jul 30, 2004Feb 17, 2005Sweere Harry C.Mechanisms based on torque equalization principles
US20050139734 *Oct 13, 2004Jun 30, 2005Constant Force Technology, LlcMonitor support system
US20050145762 *Nov 3, 2004Jul 7, 2005Constant Force Technology, LlcMethods and apparatus for generating force and torque
US20060118680 *Dec 5, 2005Jun 8, 2006Benq CorporationDisplay stand
US20060124819 *Dec 10, 2004Jun 15, 2006Gemmy Industries CorporationAdjustable trunk for an artificial Christmas tree
US20060130713 *Dec 16, 2005Jun 22, 2006Steelcase Development CorporationLoad compensator for height adjustable table
US20060130714 *Dec 16, 2005Jun 22, 2006Steelcase Development CorporationLoad compensator for height adjustable table
US20060145036 *Dec 16, 2005Jul 6, 2006Steelcase Development CorporationHeight adjustable table
US20060185563 *Sep 28, 2005Aug 24, 2006Sweere Harry CLift mechanism systems and methods
US20070137535 *May 2, 2006Jun 21, 2007Steelcase Development CorporationLoad compensator for height adjustable table
US20080026892 *Jul 26, 2007Jan 31, 2008Ergotron, Inc.Balanced moment lift system and method
US20080250989 *Jan 25, 2008Oct 16, 2008Rubbermaid IncorporatedWorkstation
US20090179121 *Mar 19, 2009Jul 16, 2009Ergotron, Inc.Stand system and method
US20090230261 *Mar 6, 2009Sep 17, 2009Qisada CorporationHeight Adjustable Holding Apparatus
US20100176254 *Mar 23, 2010Jul 15, 2010Ergotron, Inc.Lift mechanism systems and methods
US20100193653 *Apr 7, 2010Aug 5, 2010Ergotron, Inc.Lift mechanism systems and methods
US20110042911 *Jun 17, 2008Feb 24, 2011Rubbermaid IncorporatedCart with flexible cable carrier
US20110075350 *Dec 2, 2010Mar 31, 2011Ergotron, Inc.Stand with panning base
US20110083510 *Mar 12, 2010Apr 14, 2011Quanta Computer Inc.Vibration wave output instrument and method of using the same
US20120112035 *Nov 9, 2010May 10, 2012Tever Technik Vertriebs-und Beteiligungs-GmbH & Co. Beratungs KGHeight-Adjustable Pedestal
US20120248273 *Mar 27, 2012Oct 4, 2012David SingerMounting system with adjustable height and load carrying surface
US20140077050 *Nov 12, 2012Mar 20, 2014Ming-Hsien HuangLifting device
US20160236920 *May 18, 2015Aug 18, 2016Ming-Hsien HuangLifting device
US20160278514 *Jun 9, 2016Sep 29, 2016Anthony Paul MaasHeight Adjustable Work Platform Apparatus
US20160296005 *Dec 1, 2014Oct 13, 2016La (Linear Adjustment) Dev. LimitedDriving device for a support column
CN101371069BSep 28, 2005Apr 6, 2011爱格升公司Lift mechanism systems and methods
CN101442921BDec 15, 2005Nov 14, 2012斯蒂尔凯斯发展股份有限公司Height adjustable table
CN104220801A *Mar 15, 2013Dec 17, 2014爱格升有限公司Counterbalancing lift mechanisms and methods
CN104220801B *Mar 15, 2013Jul 21, 2017爱格升有限公司平衡提升机构及其方法
CN104565702A *Dec 16, 2014Apr 29, 2015河南中光学集团有限公司Height and direction adjustment mechanism for small instrument
EP0199079A1Mar 18, 1986Oct 29, 1986Siemens AktiengesellschaftDevice for adjusting the height of a support for a medical apparatus on a vertical stand
EP0203291A1 *Mar 18, 1986Dec 3, 1986Siemens AktiengesellschaftDental X-ray equipment
EP1851156A4 *Sep 28, 2005Sep 14, 2016Ergotron IncLift mechanism systems and methods
EP2597993A1 *Jul 26, 2011Jun 5, 2013Ergotron, Inc.Display positioning apparatus and method
EP2597993A4 *Jul 26, 2011Aug 20, 2014Ergotron IncDisplay positioning apparatus and method
EP2598790A1 *Jul 26, 2011Jun 5, 2013Ergotron, Inc.Cam balance mechanism systems and methods
EP2598790A4 *Jul 26, 2011Aug 20, 2014Ergotron IncCam balance mechanism systems and methods
EP2787269A1 *Nov 8, 2013Oct 8, 2014Instytut Technologii EksploatacjiSounding pipes rack for recovery ventilation systems
WO2006036889A2 *Sep 28, 2005Apr 6, 2006Ergotron, Inc.Lift mechanism systems and methods
WO2006036889A3 *Sep 28, 2005Jun 14, 2007Ergotron IncLift mechanism systems and methods
WO2008092092A3 *Jan 25, 2008Dec 11, 2008Benjamin Shane BustleWork station
WO2013148352A1 *Mar 15, 2013Oct 3, 2013Ergotron, Inc.Counterbalancing lift mechanisms and methods
WO2014098571A1 *Sep 16, 2013Jun 26, 2014Type22 B.V.Balanced support device
WO2017132814A1 *Feb 1, 2016Aug 10, 2017深圳市大疆灵眸科技有限公司Vertical stability augmentation mechanism, cradle head apparatus, and photographing device
U.S. Classification248/572, 248/647, 248/676, 248/669
International ClassificationF16M11/04, F16M11/24, B66B17/12, A61B6/00
Cooperative ClassificationF16M2200/047, F16M11/42, F16M11/046, F16M11/04, A61B6/447, F16M11/24, B66B17/12
European ClassificationA61B6/44J10, F16M11/42, F16M11/04T2, F16M11/24, B66B17/12, F16M11/04