Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS2547532 A
Publication typeGrant
Publication dateApr 3, 1951
Filing dateJun 17, 1949
Priority dateJun 17, 1949
Publication numberUS 2547532 A, US 2547532A, US-A-2547532, US2547532 A, US2547532A
InventorsWilliam A Mendelsohn
Original AssigneeBurton Mfg Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Jointed bracket
US 2547532 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

April 3, 1951 w. A; MENDELSOHN JOINTED BRACKET Filed June 17, 1949 AT TO RNEY Patented Apr. 3, 1951 UNITED STATE OFFiCE JOINTED BRACKET William A. Mendelsohn, Chicago, 111., assignor to Burton Manufacturing Company, Chicago, 111.,

a corporation of Illinois Application June 17, 1949, Serial No. 99,668

bers under ver slight pressure, and at the same time maintain the members securely and firmly in any position to which they have been moved.

A further object of the present invention is to provide tension means for counter-balancing swingable members, which means may be regulated to provide varying degrees of tension, and is hence easily adapted for a marked variety of uses.

An additional object of the present invention is to provide tension means for counter-balancing swingable members which is reliable in operation and is economical in construction.

With the above and other objects in View, my invention resides in the novel features of form, construction, arrangement, and combination of parts presently described and pointed out in the claims.

In the accompanying drawing Figure 1 is a fragmentary perspective view of an adjustable counter-balanced bracket constructed in accordance with and embodying the present invention and adapted for use as a lamp standard;

Figured is a vertical sectional view of the swivel joint;

Figures 3 and 4 are transverse sectional views taken along lines 3-3, l i, respectively, of Figure 2;

Figure 5 is a transverse sectional Vlew'taken along line 5-5 of Figure 3; and a Figure 6 is a transverse sectional view taken along line 5-6 of Figure 2. I

Broadly speaking, the present. invention resides in providing a jointed supporting bracket comprising two arms swingably connected by a joint having self-contained counter-balancing means whereby the jointed arms may be moved by slight or finger tip pressure intoa selected position, and be maintained securely at any position at which movement is stopped.

Referring now in more detail and by reference characters to the accompanying drawing which illustrates a preferred embodiment of the present invention, A designates a supporting bracket comprising two arms I, 2, pivotally connected by a rocking joint 3. At its outer end the arm 2 is bifurcated and provided with a conventional swivel for supporting a vertical leg I provided at its upper end with a lamp B. The arm i is of general rectangular cross section having front and back walls 5, 5', and side walls 5, 6', and being open at its lower end for receiving the reduced upper end l of a connecting member 8 to which it is secured by screws 9 extending through suitable apertures in the walls 5', 6, E.

The connecting member 8 is provided with an internally threaded collar portion it for suitable attachment to a conventional floor standard 3. At their upper ends the side walls 6,5, of the arm 9 project forwardly beyond the plane of the front wall 5 in the formation of somewhat semicircular joint leaves li provided with axially aligned concentric apertures E2, the rearward portions of which are peripherally enlarged to form cam slots 3. The upper transverse margin of the front wall 5 is located just below the point of intersection between the arcuate margin of the leaves i! and the forward vertical margin of the side wall 6 and the back wall 5' at its upper end is curved upwardly and forwardly along the rearwardly presented portion of the arcuate margins of the leaves H, terminating substantia ly above the upper margin of the front wall 5 in the provision of an opening it between the arouate portions of the side walls t, 5, and the top and forward margins of the walls 5, 5', respectively.

Provided within the arm I and extending transversely thereacross is a swivel block 15 supported at its ends by shoulder screws it which project through suitable apertures in the sides 6, G. Centrally provided in the swivel block 55 is a vertical passage it for slidable projection there- ;through of an elongated screw member i8 which extends slidably through a bore is in a spring retainer member is disposed beneath the block I5 and having a diametrally reduced lower portion in the provision of an abutment shoulder 2 i, against which bears the upper end of a compression spring 22. At its lower end the compression spring 22 bearsagainst the shoulder 23 of a sec- .ond spring-retainer member 24 of similar construction to the member 2a but having a central bore 25 internally threaded fo engagement with the threaded lower end 260i the tension screw i8. The upper end of the screw i8 is formed in the provision of an eyelet 2'! through which transversely extends a stop pin 28, the ends of which project through the cam slots it of the apertures 52, respectively. The arm 2, like the arm I, is rectangular in cross section having a top wall 29, a bottom wall 30, and side walls 3|, which are provided at their rearward ends with substantially circular joint leaves 32 spaced apart in such a manner as to snugly overlie and abut facewise against the leaves I I, and are provided with radially inwardly extending arcuate recesses 33 for embracingly fitting around 'andeng'aging the stop pin '28. Forwardly of said recesses 33 the leaves 32 are respectively provided with apertures 34, concentrically aligned with the apertures I2 of the leaves I I.

Positioned in facewise abutment against the outer faces of the leaves H {are cover bea rings 35, 3E. The cover-bearing '35 is provided with a central aperture 37 concentrically aligned with the apertures l2 and the apertures t hand-a oncentric boss 31 adapted to fit snugly within and ride peripherally against the margins of'theaperture l2. The bearing 35 is integrally provided with'a stem 38 projecting inwardlyandconcentrically through said aligned apertures 12, 34, into the aperture -37 the bearing 35 is also provided with a circular boss 38 adaptedtofit snugly within, and rideperipherally against, the margins of the other aperture i2. At its outer'e'ndfthe stem "38 is axially drilled and tapped i for I receivingascrew 39 having a fiared head"*39 which is seated in a countersunkenlargement-swat the outer end of the aperture '37.

En'eircling the stem SB-and bearingat-'its-end against the inner faces of the end portions of the joint leaves 32 isaspacingsleeve member H. The cover-bearings '35, 436, are iirro'vided on their inner faces with-axially aligned-recesses '42,?3,

respectively, for receiving the ends of the-stop :pin 28. Disposed between the joint leaves ll, 32,

-respe'ctively, are phosphor bronze washerstid, 45,

respectively, and suitably wedged in circular recesses 46, '47, provided in the inner faces of the -cove"r be'a'rings 35, 36, respectively, and concentric with-the stem 38, areannulanfelt-wicks 48,

ingelectricity to the-lamp B.

p ation it will I be seen that downward tilting movement may be imparted t'o the adjusting arm 2 by exercising slightpressure-which lifts the stop pin 28 to cause the stem-member 18 to'b'e carried upwardly through the-passage '9 of the member 25 and the bore H of 'theswiva block 25, bringingtheretainer membe z i' therealong to effect compression-of the spring 22. 'Thusit "will be seen that any gravitational effect upon thearm "2 will-be counter-balanced by the spring 22 whereupon the arm 2 will' remain fixed in theselected'position. Conversely,-if thearm 2 is swung upwardly the stop pin '28 will be car- 'ried downwardly and the spring 22 will expand exerting a substantial lifting force so that only very light manual pressure is required. Since the joint leavesl'l'are stationary,'thecam slots 1 -|"3 therein, by restraining engagement with'the stop pin'28, serve tolimit-the' arcthrough which the arm 2 may be moved. Thus, when the stop pin 28 is in contact with the lower end of the cam slots I3 the upper limit of movement of the arm 2 will have been reached, and, correspondingly, the upper end of the cam slots l3 determine the extent of downward movement of the arm 3.

Adjustment-may be made by-threading the retainer member 241 upwardly or downwardly along the end 26 of the screw la in order to regulate "the resisting force of the spring 22 so that it will be just a slight bit less than enough to overcome the friction between the leaves i l, 32 under .the particular load resulting from the weight of the arm 2 'and'thelamp B carried thereby.

It s'hould'be understood that changes and modiifica-tio'ns in the form, construction, arrangement and combination of the several parts of the jointed "brackets may be made and substituted for those herein shown and described without departing from the nature and principle of my invention.

Having thus described my invention what I claim and desire to secure by Letters Patent'is:

1. A jointed bracket comprising a first arm, a second-arm, said arms being rectangularin cross section with the central portion hollow, joint leaves provided on one end ofeach of said first and second arms, bearing members engaging said fjoint leaves of the first and second arms for pivotally securing said arms, an elongated screw swivell mounted in said first arm and integrally their extremities, bearing members engaging said jointleaves of the first'and second arms foripivotally securing said arms, an elongated screw swivelly mounted in said first armand integrally provided at its upper end with a tubular -eye,

shouldereproviding ,members mounted space'dly on said screw, a spring encircling said crew and bearing'at its ends against the shoulder-providing members, a pin rotatably extending through ,said -tubular eye and inserted at its ends through the aligned slots in the first and second arms.

WILLIAM- A. MENDELSOHN.

REFERENCES CITED 'The following references are of record inthe file of this patent:

UNITED STATES PATENTS Number Name Date Re. 17,845 Bosworth Oct. 28,1930 1,642,367 Hand. et al Sept. 13, 1927 1,708,047 ,Bosworth Apr 9, 1 929 2,416,910 Crosby'et al -QMar. 4, 1947

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1642367 *Jul 15, 1925Sep 13, 1927Pelton & Crane CompanyDental light
US1708047 *Dec 1, 1926Apr 9, 1929Harry J Bosworth CompanyLight fixture
US2416910 *Aug 11, 1944Mar 4, 1947Signode Steel Strapping CoPackage-binding tool support
USRE17845 *Jul 21, 1924Oct 28, 1930Harry JHakey j
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2665102 *Jun 26, 1950Jan 5, 1954Perbal Albert CAdjustable bracket structure
US2712425 *Jan 7, 1953Jul 5, 1955Richard RuemelinHose support for fume and dust collectors
US2833504 *May 17, 1954May 6, 1958Gen Lamps Mfg CorpAdjustable weight supporting mechanism
US3856251 *Oct 24, 1972Dec 24, 1974Nouveau Prod CorpSelf-compensating extensible beam
US4139883 *Jun 8, 1977Feb 13, 1979Original Hanau Quarzlampen GmbhRotary joint, particularly to suspend heavy metal weights from a ceiling, such as an operating room light
US4501557 *Jul 25, 1983Feb 26, 1985Kabushiki Kaisha Morita SeisakushoBalancing device for dental arm
US4577819 *May 14, 1984Mar 25, 1986Bennett Richard CSelf-balancing boom apparatus
US4598601 *Sep 15, 1983Jul 8, 1986Ole MolaugMeans for counterbalancing mass in mechanisms such as a robot arm
US4744019 *Sep 12, 1986May 10, 1988Jac Jacobsen A/SCounterbalanced arm assembly
US4753128 *Mar 9, 1987Jun 28, 1988Gmf Robotics CorporationRobot with spring pivot balancing mechanism
US4756204 *Feb 11, 1987Jul 12, 1988Cincinnati Milacron Inc.Counterbalance assembly for rotatable robotic arm and the like
US6012821 *Mar 30, 1998Jan 11, 2000Hill-Rom, Inc.Support arm for surgical light apparatus
US6480613 *Dec 27, 1999Nov 12, 2002Tony Tzi Chan ChoiLoudspeaker stand
US7065811Mar 17, 2004Jun 27, 2006Hill-Rom Services, Inc.Radial arm system for patient care equipment
US7097145Sep 14, 2001Aug 29, 2006Hill-Rom Services, Inc.Support arm for a surgical theater system
US7254850Jun 6, 2006Aug 14, 2007Hill-Rom Services, Inc.Radial arm system for patient care equipment
US7367376 *Aug 5, 2003May 6, 2008Llaza, S.A.Articulated arm for awnings, with improved elastic effect
US7837674Jan 26, 2007Nov 23, 2010Intuitive Surgical Operations, Inc.Compact counter balance for robotic surgical systems
US7913341Apr 5, 2010Mar 29, 2011Lift-U, A Division Of Hogan Mfg., Inc.Counterbalance mechanism for fold out ramp
US7913342 *Apr 5, 2010Mar 29, 2011Lift-U, A Division Of Hogan Mfg., Inc.Counterbalance mechanism for fold out ramp
US7913343 *Apr 5, 2010Mar 29, 2011Lift-U, A Division Of Hogan Mfg., Inc.Counterbalance mechanism for fold out ramp
US7921489Jun 28, 2007Apr 12, 2011Hill-Rom Services, Inc.Radial arm system for patient care equipment
US8020234Apr 5, 2010Sep 20, 2011Lift-U, A Division Of Hogan Mfg., Inc.Counterbalance mechanism for fold out ramp
US8051610Aug 23, 2005Nov 8, 2011Hill-Rom Services, Inc.Patient flatwall system
US8220765Jun 23, 2008Jul 17, 2012Intuitive Surgical Operations, Inc.Spring counterbalance for rotating load
US8336138Mar 18, 2011Dec 25, 2012Hill-Rom Services, Inc.Radial arm system for patient care equipment
US8500722Oct 14, 2010Aug 6, 2013Intuitive Surgical Operations, Inc.Methods for compact counter balance arms
US8678334Nov 1, 2011Mar 25, 2014Hill-Rom Services, Inc.Patient flatwall system
US8834489Jul 11, 2012Sep 16, 2014Intuitive Surgical Operations, Inc.Modular manipulator support for robotic surgery
US8931748 *Jun 9, 2010Jan 13, 2015Innovative Office Products, LlcArticulating monitor arm with cable and spring
US9023060Dec 6, 2012May 5, 2015Intuitive Surgical Operations, Inc.Modular manipulator support for robotic surgery
US9291793Oct 14, 2010Mar 22, 2016Intuitive Surgical Operations, Inc.Apparatus for compact counter balance arms
US20040188578 *Sep 14, 2001Sep 30, 2004Turner Jonathan DSupport arm for a surgical theater system
US20040199996 *Mar 17, 2004Oct 14, 2004Newkirk David C.Radial arm system for patient care equipment
US20060073713 *Aug 23, 2005Apr 6, 2006Chance Richard WPatient flatwall system
US20060151125 *Aug 5, 2003Jul 13, 2006Joan Llagostera FornsArticulated arm for awnings, with improved elastic effect
US20070156122 *Jan 26, 2007Jul 5, 2007Cooper Thomas GCompact counter balance for robotic surgical systems
US20090314131 *Jun 23, 2008Dec 24, 2009Intuitive Surgical, Inc.Spring Counterbalance for Rotating Load
US20100008854 *Jul 11, 2008Jan 14, 2010Seung Joo HaamMetal nanocomposite, preparation method and use thereof
US20110023285 *Oct 14, 2010Feb 3, 2011Intuitive Surgical Operations, Inc.Methods for compact counter balance arms
US20110023651 *Oct 14, 2010Feb 3, 2011Intuitive Surgical Operations, Inc.Apparatus for compact counter balance arms
US20110088174 *Apr 5, 2010Apr 21, 2011Lift- U, A Division Of Hogan Mfg., Inc.Counterbalance mechanism for fold out ramp
US20110088175 *Apr 5, 2010Apr 21, 2011Lift- U, A Division Of Hogan Mfg., Inc.Counterbalance mechanism for fold out ramp
US20110088176 *Apr 5, 2010Apr 21, 2011Lift- U, A Division Of Hogan Mfg., Inc.Counterbalance mechanism for fold out ramp
US20110088177 *Apr 5, 2010Apr 21, 2011Lift- U, A Division Of Hogan Mfg., Inc.Counterbalance mechanism for fold out ramp
US20120267497 *Jun 9, 2010Oct 25, 2012Innovative Office Products, Inc.Articulating monitor arm with cable and spring
DE10237081A1 *Aug 9, 2002Feb 19, 2004Gutjahr GmbhMechanism for locking ball of ball-and-socket joint between fixed and mobile sockets comprises e.g. pneumatic cylinder producing force to for torque on ball
DE10237081B4 *Aug 9, 2002Jul 22, 2004Gutjahr GmbhKugelspannvorrichtung mit Gewichtsentlastung
Classifications
U.S. Classification248/292.11, 362/427
International ClassificationF16M11/10, F21V21/26
Cooperative ClassificationF16M2200/044, F16M11/10, F16M11/2021, F21V21/26
European ClassificationF21V21/26, F16M11/20A2, F16M11/10