Pendant type electrical switching device
AssigneeColumbus McKinnon Corporation
InventorsJames J. Pancook, Otmar M. Ulbing
Life of this patent
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Abstract
An electric switching apparatus having a trough-shaped body member formed of tough, non-conductive, flexible and substantially fully resilient material within which are seated a plurality of switching mechanisms. A pair of tubular shaped sheath members formed of flexible highly resilient non-conductive material snugly encompasses the device in weatherproof electrically insulated manner; portions of said sheath members being shaped to simulate manually push-operable button devices for actuating said switching devices.
Claims11
An electrical switch apparatus of the type adapted to be suspended by means of a cable comprising a load supporting carrying strand accompanied by electrical conductor members extending from an overhead hoist being controlled thereby, said apparatus comprising in combination:
- an elongated body member having upper and lower ends and defining an open cavity and apertures communicating with said cavity, said body member being formed of an electrically non-conductive and a relatively stiff resilient material;
- a cover plate formed of an electrically non-conductive and relatively stiff resilient material detachably connected to said body member so as to cover said cavity opposite to said apertures, said body member and said cover plate cooperating to provide a peripherally extending mounting groove arranged intermediate said apertures and said upper end of said body member;
- switching mechanisms positioned within said cavity in alignment with said apertures and detachably connected electrically to said conductor members;
- means for detachably connecting said upper end of said body member to depend from said carrying strand;
- and
- generally tubular shaped upper and lower sheath members formed of an electrically non-conductive and highly resilient material removably fitted over said upper and lower ends of said body member to cover said body member and said cover plate in a waterproof and electrically insulated manner with adjacent ends of said sheath members being arranged in a lapped relation above said mounting groove, said lower sheath member having portions thereof arranged in alignment with said apertures serving to define buttons adapted for manual depression for selectively operating said switching mechanisms, said lower sheath member having an internal flange portion removably received within said mounting groove and having an outwardly facing peripheral groove to provide a locking depression for receiving a lapped end of said upper sheath member retained in place by an elastic ring extending peripherally thereof, and said upper sheath member having an extended tubular shaped end portion slide-fitted about said cable in moisture sealing relation therewith and operating to brace said cable against sharp bends adjacent to said body member.
An electrical switch apparatus of the type adapted to be suspended by means of a cable from an overhead hoist to be controlled thereby, said switch apparatus comprising in combination:
- a body member formed of an electrically non-conductive and relatively stiff resilient material having a cavity and a pair of apertures opening into said cavity;
- sheath means formed of an electrically non-conductive and highly resilient material enclosing said body member and defining push-operated buttons aligned one with each of said apertures;
- an elongated resiliently deformable electrical contact member supported by its opposite ends to extend lengthwise thereof within said cavity and transversely in alignment with said apertures;
- a current supply bar arranged in said cavity for engagement with said contact member adjacent a mid-point thereof, said supply bar being disposed intermediate said buttons and on a side of said contact member spaced from said buttons;
- and two pairs of electrical contacts supported within said cavity in alignment one pair with each of said buttons and on a side of said contact member spaced from said buttons, and each of said buttons when pressed upon to a first degree being operable to deform said contact member transversely thereof into engagement with a first contact of an aligned one of said pairs of contacts and when pressed upon to a further degree, further deforming said contact member into engagement with a second contact of said aligned one of said pairs of contacts.
Dependencies are inferred from the claim text.