US2177249A - Electric switch - Google Patents

Description

H. J. HAMMERLY ELECTRIC SWITCH Filed NOV. 20, 1937 INVENTOR lgrima/wl B v TTORNEY Paten-ted oci. 24, 1939 UNITED STATES PATENT.x OFFICE Company, Plainville, Connecticut or to The Trumbull Electric Manufacturing Conn., a corporation of Application November 20, 1937, Serial No. 175,603

7 Claims.

My invention relates particularly to enclosed or safety type switches and has for its main object to provide convenientv and satisfactory means for padlocking or sealing the actuating handle either in the off or on position. Another object is to rigidly and positively lock the handle to the correlated locking and interlocking members.

In its preferred form the invention contemplates the use of a U-shaped anchorage member fitted to m the pivoted end of the handle and a combined stop and anchorage member secured to the wall of the box or switch receptacle adjacent the pivot of the handle and the crank shaft.

Fig. 1 is a front view of a switchstructure em- 13 bodying one form. of-my invention, part of the cover being broken away to. disclose part of .ther` interior switch mechanism.

Fig. 2 is a side view of the same.

Fig. 3 is a fragmentary section showing the handle and the anchorage rlugs on a large scale.- Fig. 4 is an exploded perspective View of the handle and the stops and anchorage lugs.A

Fig. 5 is a perspective'view of the rearv o'f the hub end of the handle.;

The box body 1has a cover 8 which is hinged at 9 and may be provided with the usual latch IIJ and any suitable form of interlock and a grip member. II t facilitate opening and closing the cover. f 30 The switch mechanism per se may be of any suitable type, for instance with a hinged knife blade I2.and an operating crank I3 inside the box. 'I'he actuating handle I4 on theoutside of the box has a bearing portion I supported in an openlng in the side wall concentric with the end of the crank shaft." This bearing-together with discs I8, I8 and' I9 constitutes the hub of the actuating mechanism, the parts of which are held together yand secured to the handle by screws or rivets I1. 'I'he disc I8 is larger in diameter than the bearing I5 so as to overlap the rim of the bearing opening. The end of the crank shaft extends into and has a bearing in the hub structure as shown in 3.

The invention is preferably applied to switches having some suitable .form of quick make and quick break mechanism such as the oscillator and the spring pressed throwing member 2 I. oscillator 20 is mounted between the discs I6 and I9 and has a lost motion 'connection directly or indirectly with the connector rivets I1 and a lost motion connection with the arm of the crank shaft I3 as is common in switches of this character.

'I'he switch is actuated in a well known manner -by throwing the handle I4 from the position shown in full lines (Fig. 1) to the position shown in dotted lines or vice versa.

A plate 22 is secured to the side wall ofthe box adjacent the hub of the handle and provided with projecting stops 24, 25 to serve as abutments for 5 the handle. Between these stops is an anchorage lug 26 integral withthe plate 2 2 and projecting at right angles to the side wall ofthe box.

Attached tothe handle is a U-shaped anchorage member preferably formed of sheet metal with a 10 base21 and lugs 28 and 29. 'Ihe base 21 of this member is located in a recess 30 formed in the inner side of the handle and the lugs 28, 29 overlap the edges'of the handle. 'I'he rivets I1 hold the parts of the hub and the anchorage member l5 together. The lugs 26, 28 and 29 are preferably made large enough to accommodate a number of padlocks 3| or other sealing devices-so that the Y -'switch mechanism may be secured. either in the off or on position,.and that it may require 20.

lthe concurrent action of a number of peopleto actuate the switch.

The switch is also preferably prov1dedw1th a suitable form of interlock between the cover and the actuating mechanism lasiscustomary with 25 .switches of this type. Thispreferably rtakes the form of the locking cam-like member I8 coacting with the latch 32 which in turn interlocks with the pin 33 carried by the cover as shown in Patent No. y 1,310,163 dated July 15,` 1 919. $0

As considerable strain may be brought to bear on the locking discv I8, I provide'extension lugs 34 on the bearing hub part I5 which project into the openings 35 in theA disc and thus take the strain independently of thervets I1.

. In assembling the parts the bearing hub part I5 and the lugs 34 are thrust through the opening 36 in the plate 21 so that the plate is properly positioned on the end of the handle. The bearingportion I5 is then inserted through the wallL of the 40 box and the lugs 34 are inserted in the openings 35, 35 in the interlocker disc or plate I8. 'I'he parts are then connected by means of rivets such as I1 and all of the operating strain on the plate I8 and the anchorage plate 21 is taken up independ- 45 ently of the rivets.

I claim: 1. In an electric switch, a box, switch mechanism within the box, an operating handle pivoted in a Wall of the box, a plate secured to said wall 50 adjacent the pivot of the handle and having stop shoulders for the handlefat opposite ends and an intermediate anchorage lug, and two anchorage lugs secured to the handle adjacent its pivot and adapted to be alternately moved to register with 1 CII the lug of said plate as the handle is moved to o or on position. i

2. In an electric switch, a box, switch mechanism within the box, an operating handle pivoted in a wall of the box, a combined stop and anchorage lug secured to said wall adjacent the pivot yolf the handle, a U-shaped member secured to the inner surface of the handle adjacent its pivot and having two integral outwardly projecting anchorage lugs adapted to be alternately moved so as to register with the lug of said plate.

3. In an electric switch, a box, switch mechanism within the box, an operating handle pivoted in a wall of the box, a combined stop and anchorage lug secured to said wall adjacent the pivot oi' the handle, a U-shaped sheet metal member secured to the handle adjacent its pivot and having two integral anchorage lugs adapted to be alternately moved so as to register with the lug of said plate as the handle is moved to off or on position.

4. In an electric switch. a. box, switch mechanism within the box, an operating handle pivoted to a wall of the box, a plate secured to said wall ,adjacent the pivot of the handle and having stop shoulders for the handle at opposite ends and an intermediate anchorage lug, a U-shaped member secured to the handle adjacent its pivot and having two anchorage lugs adapted to be alternately moved so as to register with the lug of said plate when the handle is moved to the oi or on" position.

5. An enclosed switch having a box with a bearing opening in one of its stationary walls, switch actuating means including an external handle having an integral hub support in said bearing opening and integral extensions projecting vfrom said .hub inside of the box, a cover for the box, and interlocking means for the cover including a perforated locking disc mounted on said hub exl tensions inside the box, a' perforated disc-like member adjacent the locking disc and rivet-like means passing through the perforations in the discs and through the extensions on the handle to secure the discs in position.

`ating disc mounted on said eccentric extension in the box so that it rotates with said handle and its hub, an inner perforated disc adjacent said actuating disc and a rivet extending transversely through said hub, said extension, said actuating disc and said inner disc and holding said parts together laterally free of shearing stress, said eccentric extension withstanding substantially the entire rotative stress between the handle hub and the actuating disc.

'7. In an enclosed switch, a box having a bearing opening in one of'its stationary walls, switch actuating means including an external handle having an integral hub supported in said bearing opening and integral extensions projecting from said hub inside of said wall, a cover for the box, interlocking means including a perforated locking disc mounted on said extensions inside the box, an inner perforated disc-like member at the inner face of said locking disc and fastening devices extending through,. the extensions on said handle and through the perforations in said discs to secure the discs in position, said extensions taking up substantially the entire rotative operating stress between said handle and said locking disc.

HERMAN J. HAMMERLY.

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