US2125726A - Vacuum cleaner - Google Patents

Description

llg- 2 1938 A. ERlKssoN-JONS 2,125,726

VACUUM CLEANER Filed Deo. 28, 1934 25;- j); 23/25 f4 iii-HiN27 5 f6 INVENTOR,

BY @www I ATTORNEY.

23 @j w 26 l Patented Aug. 2, 1938 UNITED STATES VACUUM CLEANER Anders Eriksson-Jans, Stockholm, Sweden, as-

signor to Aktiebolaget Elektrolux, Stockholm, Sweden, a corporation of Sweden Application December 28, 1934, Serial No. 759,494 In Germany December 30, 1933 1 Claim.

My invention relates to electrically operated apparatus and more particularly to electric vacuum cleaners.

In electrically operatedapparatus it is common practice to provide contact pins adapted to be engaged by the plug of an electric cable in order that the cable may be readily disconnected from the device when not in use. Obviously, it is necessary to electrically insulate these pins from metallic parts of the device in order to assure that neither side of the electric circuit become's grounded on the metallic parts. One oi the objects of my invention is to provide improved insulating means i'or contacting pinsof the above type.

It is also often desirablev to have an electric switch associated with the contact pins and a further object of my invention is to provide means for preventing the entrance of dust into the switch. This is particularly important in connection with devices, such as vacuum cleaners, which may be operated in an atmosphere containing abnormal quantities of dust.

Further objects and advantages of my invention will be apparent from the following description considered in connection with the accompanying drawing, which forms a part of the specification and of which:

- Fig. 1 is a side view. partially in cross-section,

' 30 of a preferred embodiment of my invention applied to a vacuum cleaner:

Fig. 2 is an end view on an enlarged scale of a portion of the device shown in Fig. 1;

Fig. 3 is a cross-sectional view taken on the line 35 3-,3 of Fig. 2;

Fig. 4 is an end view of a member shown particularlyin Figs. 2 and 3: and

Fig. 5 is a cross-sectional view taken on the line 5--5 of Fig. 4. 40 Referring more particularly to Fig. 1, reference character I0 designates the casing of a vacuum cleaner of the enclosed bag type. Suitably secured to one end of casing I0 is a ring II which in turn supports a ring I2 made of .insulating 4.5 material, such as Bakelite. This ring serves to support an electric motor Il in known manner. Ring I2 is formed with two openings extending from the inside to the outside of the ring in which are located conductor members or bars Il. 50 Secured to the lower end of one of the bars Il is an electric switch I5. Switch I! is provided with an operating lever I6 which extends through an opening I1 formed in ring I2. 'I'he upper end of lever I8 engages within a recess I l formed in -a 55 reciprocally mounted switch operating member Extending substantially at right angles to the upper ends of members Il `are contact pins 20. .A shield 2I is secured to ring I I by means of a bolt 60 22 and serves to surround pins 20. Shield 2| is.v

preferably made of metal in order to resist breakage. An insulating member 23 is clamped beand is formed with recesses 2l through which extend pins 20. Member 23 is also formed with recesses 25 for receiving the upper ends of members I4. Branch 26 of member 23 extends downwardly behind members Il and into a recess formed in ring I2. 'I'hus when shield 2I is brought against member 23 by tightening bolt 22, member 23 will be held securely in place and no additional fastening means is required. i y

Heretofore it has been the practice to omit insulating material between the pins and the metal shield, reliance being had on maintaining these parts out of contact with each other. However, if ythe shield becomes bent or the nembers carrying the pins become loose in their support, contact between the parts carrying current and the shield may take place. I overcome this possibility by clamping the member 23 vin the position shown. Moreoven the provision of member 23 prevents access of dust to the switch I5. This is highly desirable as the presence of dust at'the contact points of the switch is aptto c ause burning when the circuit is opened.

While I have shown a preferred embodiment lof my invention it is to'be understood that this has been done for purposes of illustration only and that modifications thereof fall within its scope, which is to be determined by the appended claim viewed in the light of the prior art.

What I claim is:

member madefof insulating material and having substantially parallel oit-set surfaces joined by an intermediate surface at right angles thereto, conductor members'extending through saidsupporting member at right angles to said off-set surfaces and disposed against said intermediate surface. one of said oil-set surfaces being formed with grooves in alignment with said conductor members, contact pins carried by said contact members at right angles thereto and disposed in said grooves, a shield around said pins, an L- shaped insulating member 'separate from said supporting member and having one branch parallel to said one of said oli-set surfaces and formed with grooves embracing said contact pins, the other branch of said L-shaped member being parallel to said intermediate surface and enclosing the portions of said conductor members disposed thereagainst, and means for clamping said L-shaped insulating member between said shield and said pins, whereby said L-shaped insulating member is held in piace.

ANDERS ERIKSSON-JONS.

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