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Publication numberUS3654415 A
Publication typeGrant
Publication dateApr 4, 1972
Filing dateSep 24, 1970
Priority dateSep 24, 1970
Publication numberUS 3654415 A, US 3654415A, US-A-3654415, US3654415 A, US3654415A
InventorsBongort Edgar A, Dick Ralph A, Hawkins Harold V
Original AssigneeColumbus Mckinnon Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Pendant hoist control device
US 3654415 A
Abstract
The hoist control features a casing of pistol grip like construction, which serves to enclose electrical switches, and an externally mounted rocker operator for controlling operation of the switches. Rocker movement is transmitted to the switches through a moisture sealing diaphragm and a switch actuating means arranged within the casing for movement in response to rocker induced movement of the diaphragm.
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Description  (OCR text may contain errors)

I Unlted States Patent 1151 3,654,415 Hawkins et al. [451 Apr. 4, 1972 [s41 PENDANT HOIST CONTROL DEVICE 3,255,637 6/1966 Boyles ..200/168 G x 3,431,378 3/1969 l-lel1man.... ..200/168 0 [721 Invenmrs "f Ralph Dick bmh 3,126,467 3/1964 Stevens, 11.... ....200/l68 0 0f wllllamsvllle, 8" Bongo", 3,274,631 9/1966 Spohr ..200/157 x Southfield, Mich. [731 Assignee: Columbus McKinnon Corporation, Tona- Primary Examiner Jones Wanda, Attorney-Bean & Bean [22] Filed: Sept. 24, 1970 [57] ABSTRACT [21] Appl. No.: 75,087 The hoist control features a casing of pistol grip like construction, which serves to enclose electrical switches, and an externally mounted rocker operator for controlling operation of the [52] "zoo/168 200/157 switches. Rocker movement is transmitted to the switches [51] 9/06 Holh 9/04 through a moisture sealing diaphragm and a switch actuating [58] Field of Search ..200/168 G, 157 ean arranged within the casing for movement in response to rocker induced movement of the diaphragm. [56] References Cited 9 Claims, 6 Drawing Figures UNITED STATES PATENTS 3,472,983 10/1969 Satkunas et a1. ..200/168 G PENDANT I-IOIST CONTROL DEVICE SUMMARY OF THE INVENTION The present invention relates to pendant controls for hoists or the like.

The present control features a casing having an end portion of pistol grip like configuration, and one or more exteriorally mounted rocker arm actuators arranged to be engaged by the thumb of the hand of a user gripping the casing. The casing is formed in two halves, which are joined to securely clamp a flexible moisture sealing diaphragm therebetween; one of the halves having an opening through which the rocker arm extends for engagement with the diaphragm. A switch actuating means is arranged within the casing for movement in response to rocker arm induced movements of the diaphragm.

In one embodiment of the present invention, the switch actuating means includes a rocker member and a slide plate mounted for reciprocation upon pivotal movement of the rocker member. A spring device is employed to return the slide plate, rocker member and thus the rocker arm to an initial, centered or switch-off position immediately upon removal of a user's thumb from the rocker arm. Also, a modified arrangement is provided for employing the same rocker arm to successively perform plural switching operations, thereby permitting the present control to possess utility in controlling the operation of plural speed electric motors.

In an alternative embodiment of the present invention, the diaphragm is provided with a pair of integrally formed projections, which are arranged for engagement with a pair of pivotally supported electrical switches. In this embodiment, the rocker arm and switches are returned to their initial positions, when thumb pressure is removed from the rocker arm, by leaf spring devices deformed during rocker arm induced pivotal movement of the switches.

DRAWINGS The nature and mode of the present invention will be more fully described in the following detailed description taken with the accompanying drawings wherein:

FIG. 1 is a front elevational view of a control formed in accordance with the preferred embodiment of the present invention;

FIG. 2 is a sectional view taken generally along the line 22 in FIG. 1;

FIG. 3 is a sectional view similar to FIG. 2, but showing a slightly modified construction;

FIG. 4 is a sectional view similar to FIG. 2, but showing an alternative embodiment of the present control;

FIG. 5 is a view taken generally along the line 5-5 in FIG. 4; and

FIG. 6 is a fragmentary sectional view showing a modified construction of the control of FIG. 4.

DETAILED DESCRIPTION A control device formed in accordance with a preferred embodiment of the present invention is generally designated as 10 in FIGS. 1 and 2.

Control 10 generally includes a casing 12 having casing halves l4 and 15, which are suitably joined as by screw fasteners 16. As will be apparent from viewing FIGS. 1 and 2, the lower end of casing 12, which is generally designated as 18, is pistol-grip like in configuration in order to facilitate the gripping and operation of control 10 by either hand of a user.

Casing halves 14 and 15 are hollowed, such as to provide a cavity in which an electric switch assembly 22 having one or more switches, not shown, is arranged. Switch assembly 22 is shown as being mounted on casing half 14 by a support bracket 24, which is in turn suitably affixed to casing half 14, as by screw device 25. Switch assembly 22 is of the type including a slide member 26, which is arranged above bracket opening 27 for reciprocation in opposite directions for the purpose of actuating the switches of the assembly in a desired sequence.

Switch assembly 22 may be electrically connected to an art device to be controlled, such as the motor of an electrically operated hoist, not shown, by a control suspension cable 28 suitably sealed within outlet opening 29 of casing half 14. An anchor screw device 30, which is fixed to casing half 14, may be employed to directly connect casing 12 to suspension cable 28 in order to relieve any strain imposed on the electrical connections of assembly 22 during manual manipulation of the control.

Again referring to FIGS. 1 and 2, it will be seen that casing half 15 is formed with an opening 32 arranged in communication with cavity 20. Switch assembly 22 is fluid sealed relative to opening 32 by flexible diaphragm 34, which is preferably clampingly secured in a sandwiched relationship between casing halves 14 and 15. The fluid seal afforded by clamping diaphragm 34 between the casing halves is enhanced by providing the diaphragm with integrally formed projections 36 receivable within slots 38 of easing half 14. Further, diaphragm 34 may be rendered more flexible adjacent opening 32 by forming the diaphragm such as to form opening bounding fold 39.

A rocker arm 40 to be used in operating the switches of assembly 22 is mounted on casing half 15, as by pivot pin shaft 42, for pivotal movement in opposite directions from its normal or centered operating position illustrated in FIG. 2. Preferably, rocker arm 40 is arranged within opening 32 and provided with feet-like operators 40a and 40b, which are normally arranged in non-deforming engagement with the outer surface of diaphragm 34, when the rocker arm is in its normal position. It will be apparent from viewing FIGS. 1 and 2, that rocker arm 40 is arranged such as to facilitate pivotal operating movement thereof by the thumb of the hand of the user gripping pistol grip end portion 18.

An actuator or motion-transmitting device, generally designated as 50, is arranged within cavity 20 for the purpose of imparting actuating movement to switch assembly operating slide member 26 in response to movement imparted to diaphragm 34 upon pivotal movement of rocker arm 40. In the embodiment of the invention shown in FIG. 2, actuator 50 includes a rocker member 52, which is supported for pivotal movement by rivet pin 54 carried on switch assembly mounting bracket flange 56; and a slide plate 58, which is slideably received between mounting bracket 24 and casing half 14. Slide plate 58 is suitably constrained for reciprocating movement, as by casing guide post 60, which is slideably received within slide plate slot opening 62. Rocker member 52 defines a pair of feet members 52a and 52b, which are normally arranged for engagement with the inner surface of diaphragm 34 in alignment with rocker arm operators 40a and 40b, respectively. Rocker member 52 additionally includes a necked end portion 64, which is received within slide plate opening 66. Slide plate 58 is operably connected to slide member 26 by an integrally formed stud 69, which is freely received within mounting bracket opening 27.

Thus, when rocker arm 40 is pivoted in a clockwise direction, as viewed in FIG. 2, diaphragm 34 is deformed by operator 40a, rocker member 52 is forced to rotate in a clockwise direction by the diaphragm, slide plate 58 is forced to reciprocate vertically downwardly by the rocker member, and slide member 26 forced to reciprocate vertically downwardly by the slide plate into one of its switching positions. When rocker arm 40 is pivoted in an opposite direction, the movements of the rocker member, slide plate and slide member are of course reversed.

As by way of example only, when control 10 is used to control operation of an electrically operated hoist, pivotal movement of rocker arm 40 in directions opposite from its centered position, shown in FIG. 2, will result in either the lowering or elevating the hoist chain or cable.

In view of safety considerations, it is preferable to both automatically return and retain rocker arm 40 in its centered position, whenever the thumb of the user is intentionally or accidentally removed therefrom. Thus, the centered position of rocker arm 40 may be characterized as being its switch off or neutral position. To this end, there is employed a coil spring 70 received within facing slot apertures 72 and 74, which are provided in casing half 14 and slide plate 58, respectively. Apertures 72 and 74 are aligned with the direction in which the slide plate is reciprocated and have end surfaces engageable with the respective ends of spring 70. As will be apparent from viewing FIG. 2, when slide plate 58 is reciprocated and rocker arm 40 is subsequently freed for movement, the bias of spring 70 tends to return the slide plate and thus the rocker arm to their initial positions, wherein aperture 74 is returned and disposed in relative alignment with aperture 72.

FIG. 3 illustrates a slightly modified control construction 10, which is particularly adapted to successively operate plural switches when rocker arm 40 is pivoted in a given direction, thereby possessing utility in the control of plural speed electric motors. In this construction, the switch assembly heretofore described is replaced with plural switches 22, which are gang mounted on bracket 24 and include operating plungers 22a freely received within bracket opening 27'. Plungers 22a are adapted to be received one in each of a plurality of parallel slide plate slots 80, only one being shown in FIG. 3. By appropriately staggering slots 80, the sequence in which plungers 22a are depressed to effect actuation of the several switches 22' may be controlled, such as to provide for low speed hoist operation during an initial portion of rocker arm movement and for high speed hoist operation during a final portion of rocker arm movement.

In order to prevent unintentional initiation of high speed operation when only low speed operation of the control shown in FIG. 3 is desired, the rocker arm retaining arrangement heretofore described is additionally provided with a second coil spring 81. Coil spring 81 is received within facing slot apertures 82 and 84, which are provided in casing half 14 and slide plate 58, respectively, and aligned with the path of slide plate movement. Aperture 84 is shown as having a greater length than aperture 82; the difference in lengths therebetween delaying initiation of the compression of spring 81 until immediately before the slide plate has been moved sufficiently to initiate closing of switches 22' for high speed hoist operation. Additional thumb pressure must therefore be applied before high speed operation can be obtained.

FIGS. 4 and 5 illustrate an alternative embodiment of the present control, which is generally designated as in FIG. 4. In this embodiment a pair of switches 22a and 22b are mounted on casing half 14 for pivotal movement on pivot shafts 90, such that their operating plungers 22a may be compressed by engagement with casing half 14 when the switches are pivoted in a counter-clockwise direction, as viewed in FIG. 4. Suitable means, such as leaf springs 92a and 92b are affixed to casing half 14 in order to maintain switches 22a and 22b in their normal positions shown in FIG. 4.

Also, as will be apparent from viewing FIG. 4, the hereinabove described switch actuating mechanical linkage is replaced by the simplified construction generally designated at 50'. This construction includes a pair of actuating members or projections 94a and 94b, which are preferably molded integrally with a diaphragm 34. Preferably, when rocker arm 40 is in its illustrated centered position, operators 40a and 40b abut against diaphragm 34, such as to maintain projections 94a and 94b in surface engagement with switches 22a and 22b, respectively. As will be apparent, pivotal movement of rocker arm 40 in the clockwise direction, as viewed in FIG. 4, will effect actuating pivotal movement of switch 22a against its operating plunger 22a and the return bias of leaf spring 92a, whereas rotation of the rocker arm in the opposite direction will effect actuating pivotal movement of switch 22a against its operating plunger 22b and the return bias of leaf spring 92b.

FIG. 6 illustrates a control construction 10", which is structurally similar to control 10" of FIG. 4, but serves to incorporate plural controls in a single control unit. Thus, control 10" includes rocker arm 40, which may be employed to control vertical movement of the chain of a hoist, and an additional rocker arm 40, which may be employed to control movement of the hoist along an elevated trackway. In this construction, rocker arm 40 is adapted to operate two pairs of microswitches 22a, 22b via pairs of actuating members 94a, 94b, and rocker arm 40 is adapted to two pairs of microswitches 22a", 22b" via pairs of actuating members 94a, 94b. To facilitate mounting of the microswitches, microswitches 22a, 22b, and 22a", 22b" are mounted on common pivot shafts and 90, respectively.

It will be understood that casing parts 14 and 15 may, as desired, be formed of either metal or plastic and fabricated in any desired manner, such as by molding. Further, diaphragm 34 may be formed from any suitable rubber or plastic composition which provides a moisture seal and is not readily deteriorated upon exposure to oil, grease or the like. Also, if desired, diaphragm 34 may be designed to assist in returning the rocker arm to its centered position in addition to performing its normal sealing and motion-transmitting functions.

While several embodiments of the present control have been described in detail, various additional modifications thereof will likely occur to those skilled in the art in view of the foregoing description. Thus, it is considered to be broadly within the scope of the present invention to employ only one electrical switch, thereby necessitating that the rocker arm pivot in only one direction relative to its normal operating position. Further, spring devices other than those specifically described may be employed in each embodiment of the control for the purpose of retaining the rocker arm in one or more of its switch operating positions.

We claim:

1. A control device comprising in combination:

a casing characterized as having an end portion of pistol grip shaped configuration, said casing having a cavity therein and having an opening in communication with said cavity, said casing being formed of mating casing halves and said opening being defined by one of said casing halves;

at least one electrical switch arranged within said cavity;

flexible diaphragm means for sealing said opening, said diaphragm means being clampingly secured in a sandwiched relationship between said casing halves and said diaphragm means cooperating with another of said casing halves to define said cavity;

manually operated rocker arm means arranged exteriorly of said casing for pivotal movement between switch operating positions, said rocker arm means being disposed adjacent said opening for engagement with said diaphragm means; and said rocker arm means being arranged for engagement by the thumb of the hand of a user gripping said casing end portion;

switch actuating means, said actuating means being arranged within said cavity for switch actuating movement in response to said rocker arm means induced movement of said diaphragm means; and

means tending to retain said rocker arm means in one of said operating position.

2. A control device comprising in combination:

a casing, said casing having a cavity therein and having an opening in communication with said cavity;

at least one electrical switch arranged within said cavity;

flexible diaphragm means for sealing said opening;

manually operated rocker arm means arranged exteriorly of said casing for pivotal movement between switch operating positions, said rocker arm means being disposed adjacent said opening for engagement with said diaphragm means;

switch actuating means, said switch actuating means being arranged within said cavity for switch actuating movement in response to said rocker arm means induced movement of said diaphragm means, said switch actuating means including a rocker member mounted for pivotal movement in response to rocker arm means induced movement of said diaphragm means and a switch operating slide plate mounted for reciprocating movement in response to pivotal movement of said rocker member; and

means tending to retain said rocker arm means in one of said operating position.

3. A control device according to claim 2, wherein said retaining means includes spring means resiliently interconnecting said casing and said slide plate.

4. A control switch according to claim 3, wherein said slide plate and said casing are each provided with apertures aligned with the path of reciprocation of said slide plate, said spring means includes a coil spring having ends thereof arranged for abutting engagement with ends of said apertures, said coil spring tending to maintain said apertures in relative alignment, and said rocker arm means being retained in said one position when said apertures are in relative alignment. 7

5. A control device according to claim 4, wherein at least two switches are provided in combination, said slide plate being adapted to actuate said switches in succession during first and second portions of pivotal movement of said rocker arm means from said one position to another of said operating positions, said spring means includes another coil spring, said slide plate and said casing are each provided with another aperture aligned with said path of reciprocation, said other casing aperture being shorter than said other slide plate aperture in a direction aligned with said path of reciprocation, said other coil spring having ends thereof arranged in abutting engagement with ends of said other casing aperture and engageable with at least one end of said other slide plate aperture only during said second portion of pivotal movement.

6. A control device according to claim 4, wherein said rocker arm means is mounted for pivotal movement in opposite directions from said one position into other operating positions thereof, and said one position being a switchoff neutral position.

7. A control device according to claim 2, wherein at least two switches are provided in combination, said slide plate being adapted to actuate said switches in succession during first and second portions of pivotal movement of said rocker arm means from said one position to another of said operating positions, said retaining means includes a pair of spring means, a first of said spring means tending to return said rocker arm means to said one position during both said portions of pivotal movement and a second of spring means tending to return said rocker arm means to said one position only during said second portion of pivotal movement.

8. A control device comprising in combination: a casing, said casing having a cavity therein and having an opening in communication with said cavity; at least one electrical switch arranged within said cavity, said switch being supported within said cavity for pivotal movement between switching positions; flexible diaphragm means for sealing said opening; manually operated rocker arm means arranged exteriorly of said casing for pivotal movement between switch operating positions, said rocker arm means being disposed adjacent said opening for engagement with said diaphragm means; switch actuating means, said actuating means being arranged within said cavity for switch actuating movement in response to said rocker arm means induced movement of said diaphragm means, said actuating means including at least one actuating member fixed to said diaphragm means and arranged for engagement with said switch; and means tending to retain said rocker arm means in one of said operating position, said retaining means including spring means resiliently interconnecting said casing and said switch. 9. A control device according to claim 8, wherein said rocker arm means is mounted for pivotal movement in opposite directions from said one position into other operating positions thereof, two switches are provided in combination, said retaining means includes two leaf springs provided one in association With each said switch, a pair of actuating members are fixed to said diaphragm means and arranged for engagement one with each of said switches, said leaf springs tending to maintain said rocker arm means in said one position, and said one position being a switch off neutral position.

Patent Citations
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3755725 *Feb 3, 1972Aug 28, 1973American Chain & Cable CoVariable speed load balancer
US4095071 *Jul 12, 1976Jun 13, 1978Caterpillar Tractor Co.Switch mounted in a lever handle
US4105882 *Mar 3, 1977Aug 8, 1978Columbus Mckinnon CorporationControl station switch
US4152563 *Nov 29, 1976May 1, 1979B/W Controls, Inc.Push-button reversing switch
US4710602 *Feb 3, 1986Dec 1, 1987General Motors CorporationIlluminated rocker switch assembly
US4849587 *Nov 23, 1987Jul 18, 1989La Telemecanique ElectriquePendant control box
US5508479 *Nov 17, 1994Apr 16, 1996Schooley; John L.Hand held remote controller
US5603400 *Jan 24, 1996Feb 18, 1997The Whitaker CorporationRocker switch
US5725086 *Nov 22, 1995Mar 10, 1998Black & Decker Inc.Key pad for an on/off switch of a powered device
US5863027 *Aug 26, 1996Jan 26, 1999Columbus Mckinnon CorporationFor controlling lifting and lowering operations of a hoist
US5900603 *Dec 3, 1997May 4, 1999Caterpillar Inc.Seal arrangement for a switch assembly
US6241462Jul 20, 1999Jun 5, 2001Collaborative Motion Control, Inc.Method and apparatus for a high-performance hoist
US6525282 *Mar 12, 2001Feb 25, 2003Atecs Mannesmann AgPendant switch assembly for controlling a movable hoist
US6668668Feb 8, 1999Dec 30, 2003Stanley Assembly TechnologiesNon-contacting sensors
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US6822174 *Sep 13, 2003Nov 23, 2004Huf Hülsbeck & Fürst Gmbh & Co. KgDevice for activating an opening or closing mechanism for lockable moving parts on vehicles
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US6956179 *Apr 5, 2002Oct 18, 2005Itt Manufacturing Enterprises, Inc.Rocker/pushbutton switch
US7559533Jan 16, 2007Jul 14, 2009Gorbel, Inc.Lift actuator
US7578310May 11, 2006Aug 25, 2009Delaney Machinerie Inc.Pressure controller device
US20130105749 *Oct 18, 2012May 2, 2013EurocopterControl means for a lifter device, hoist apparatus, and an aircraft
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Classifications
U.S. Classification200/302.3, 200/332.2, 200/561
International ClassificationH01H9/02
Cooperative ClassificationH01H9/0214
European ClassificationH01H9/02C
Legal Events
DateCodeEventDescription
Oct 28, 1996AS99Other assignments
Free format text: COLUMBUS MCKINNON CORPORATION 140 JOHN JAMES AUDUBON PARKWAY AMHERST, NEW YORK 1 * FLEET BANK (FORMERLY KNOWN AS NORSTAR BANK, NATIONAL ASSOCIATION) : 19961011 OTHER CASES: NONE; RELEASE AND TERMINATION OF COLLATERAL PATENT AND T
Oct 28, 1996ASAssignment
Owner name: COLUMBUS MCKINNON CORPORATION, NEW YORK
Free format text: PATENT RELEASE;ASSIGNOR:GLENFED FINANCIAL CORPORATION;REEL/FRAME:008186/0884
Effective date: 19961008
Free format text: PATENT RELEASE;ASSIGNOR:BANK AMERICAN BUSINESS CREDIT, INC. AS SUCCESSOR TO SECURITY PACIFIC BUSINESS CREDIT INC.;REEL/FRAME:008186/0899
Effective date: 19961004
Free format text: RELEASE AND TERMINATION OF COLLATERAL PATENT AND T;ASSIGNOR:FLEET BANK (FORMERLY KNOWN AS NORSTAR BANK, NATIONAL ASSOCIATION);REEL/FRAME:008194/0270
Effective date: 19961011
Sep 24, 1987ASAssignment
Owner name: NORSTAR BANK, NATIONAL ASSOCIATION, NORSTAR BLDG.,
Free format text: SECURITY INTEREST;ASSIGNOR:COLUMBUS MCKINNON CORPORATION, A NY CORP.;REEL/FRAME:004777/0746
Effective date: 19861223
Owner name: NORSTAR BANK, NATIONAL ASSOCIATION,NEW YORK
Sep 8, 1987ASAssignment
Owner name: GLENFED FINANCIAL CORPORATION, 104 CARNEGIE CENTER
Free format text: SECURITY INTEREST;ASSIGNOR:COLUMBUS MCKINNON CORPORATION;REEL/FRAME:004760/0805
Effective date: 19861223
Owner name: GLENFED FINANCIAL CORPORATION,NEW JERSEY
Mar 20, 1987ASAssignment
Owner name: SECURITY PACIFIC BUSINESS CREDIT INC., 1100 SUPERI
Free format text: SECURITY INTEREST;ASSIGNOR:SOLUMBU MCKINNON CORPORATION, A CORP. OF NY;REEL/FRAME:004725/0001
Effective date: 19861223
Mar 20, 1987AS06Security interest
Owner name: SECURITY PACIFIC BUSINESS CREDIT INC., 1100 SUPERI
Owner name: SOLUMBU MCKINNON CORPORATION, A CORP. OF NY
Effective date: 19861223