US1913908A - Electric accumulator - Google Patents

Description

June 13, 1933. p WOLF 7 1,913,908

ELECTRIC ACCUMULATOR Filed'April 28, 1930 [2 Wolf Patented June 13, 19 33 g i r i UNITED STATES PAT NT O C Application filed April as, 1930. ser a1'1vo.44s,cea

This invention relates to accumulators, '12. The cells are closed by the cover 2 supmore particularly for operating miners ported on a rubber ringlO, which is pressed lamps, and to comparatively easily portable on as is described below. The pieces-6 and accumulators of elongated rectangular crossare fixed (welded, soldered) to'the vessel section, which are used for supplying current 1 and have slots at their-upper ends. 1 The to head lamps (incandescent lamps carried on pieces 15 are extended at the lower ends and the cap of the miner). The object of the inare so shaped that a belt for carrying the vention is ingeneral to increase safety in opvessel may be passed through. The pins 27 eration and avoid danger from {fire damp. attached to the frame-like levers 3 are pushed 7175 age of the electrolyte. In accumulators of "lar'ly movable;

10 For such accumulators an absolutely tight into the above mentioned slots of the pieces and reliable closing of the accumulator vessel 6 and 15, so that the levers may be moved is of particular importance, because the conabout these pins as fulcrums. The two levers ductors and fittings on the cover of the acare connected together at the middle of the cumulator vessel would be damaged by a leakvessel by a bridge "member 29 so as to be angu- [The bridgemember 29'conelongated-fiat shape, leaks may easily occur if tains the screw thread for the pressure screw the cover, in the shape of a long narrow rec-' '28, which presses on the pressure 'piece'3'O tangle, is not everywhere strongly and uniwhich covers almost the whole width of'the formly pressed on. Such a uniform pressing accumulator. By turning the screw the v I 20 on is made possible by the lever arrangement bridge member 29 and with it 'the'inner' arms 'tolbe described, in which also provision is "of the levers 3 may be lifted, Theouter made for the quickest and most convenient lever armsthen lie against the cover 2 and manipulation of the closing coverk exercise a pressure on this simultaneously It is known to provide two-armed closing with'the part 30. It is thus possibleto exer- I25 levers which are adapted to move about a cise a pressure at the middle of thejcover2,

a pivot mounted on-the cover and which are and at the same time on itsendsbymeans operated by means of a screw, which is arof this single screw 28, whereby thepressure ranged in the mlddle of the cover and engages is well distributed by. the broad-pressure a bridge member connecting the ends of'the piece 30 and the cross pieces/of the frame '30 levers. These systems are however not ap- 3. To open the accumulator vessel, it is only plicable for elongated covers and especially necessary to loosenthe screw 28 and to-slide for such covers which are made of hard rubthe lever 3, now lying loose, with its pins her or the like because they exert tension and 27 to the left out of the slots of the pieces'fi pressure on the cover and also actually cause and 15. The closing parts 3,- 29, 30,28 form 435 a deformation of the cover if the latter does a joint system novabl'e Within itself." 7

not consist of resistible material. The parts 12 nearest to the narrow side of Figure 1 of the accompanyin drawing ilthe vessel which are pressed or cast into the lustrates such an accumulator, eing an elecover 2 consisting of insulating material, vation of the narrow side, with a partial form at the top contact blades which lie'becross section. tween the contact springs 20 and 22 onthe Figure 2 is a front elevation, with a partial outer cover 4. Further, bushes ll-are fixed, section through the accumulator vessel and to the cover 2 which form the apertures for cover, so that the inner parts and arrangefilling'th'e cellswith electrolyte. The stopments are visible. pers' screwed into these bushes and tightly 1 Figure 3'is a plan View of the accumulator, closed with rubber rings are formed as-dipthe outer cover 4 with the parts attached ping contacts for-testing the height ofthe thereto beingremoved. electrolyte, andar'e reached by the electrolyte The elongated rectangular vessel 1 contains when a s'uflicient-quantity of it is' present; "At 7 two cells 33 with pairs of eleetrodes14 -14 the'uppe'ren'ds the stoppers13areelongated 50 which are attached to the cover 2 by holders so that they reach through openings in'the arms of the levers outer cover 4:. It can thus be ascertained, whether the electrolyte in a cell stands at a sufficient height, by applying a current circuit consisting of an accumulator 31 and lamp 32 to the dipping conductor and to the outer wall of the accumulator vessel, in the manner shown in Figure 2, when the lamp 32 should light up, if the liquid level is correct. It is, however, impossible for unauthorized persons to remove the stoppers 13, as they are cut away at their upper ends, and are held fast in the rubber rings 17, 18 fitted in the apertures of the cover 4. On the other hand the cover 4 cannot be fitted on and closed if the stoppers 13 are not properly screwed in. T e completely removable cover 4: is so formed that it overlaps the edge of the accumulator vessel 1 on all four sides. It thereby engages, with its strengthened hook-like extension 4a (Figure 2, left), the protruding edge of the vessel, while on the opposite side (Figure 2, right) it is secured by the hasp of the flap 8 which is rotatable in the joint 7, and whose nose 8a enters a hole in the cover. The nose 8a is secured to the cover by a latch 9 under spring pressure, which can only be released by means of a strong magnet. The rings 17 18 in the cover 4 thus serve for various purposes. They prevent the closing of the cover 4 when the stoppers 13 are not properly screwed in; they close tightly the openings in the cover 4: about the stoppers 13; they insulate the stoppers from the cover.

Inside the cover 4 are the contact springs 29, 22 which are fixed by the screws 19 and '21. From the screw 21 a conductor 26 leads directly to the outgoing cable 5; from the screw 19 the current passes through a fuse 23 to the screw 24 and fromthere to the conductor 25 and into the cable 5. A lamp attached to the other end of the cable 5, e. g. a head lamp can now be so secured that in case of damage a short circuit is caused so that the fuse 23 melts and the conductors 25, 26 carry no more current. When the accumulator is quite ready for use and properly closed, it is impossible either to damage an important part of it, or to touch any current carrying conductor, and it is also possible to test easily whether a suflicient amount of electrolyte is present in the cells. without having to remove the cover 4.

What I claim is 1. An accumulator comprising a vessel, a

cover for the vessel, two-armed levers arranged thereon which levers are rotatable about fixed points on theaccumulator vessel anda pressure screw which presses 0n the cover for pressing one arm of each of the levers away from the cover, whereby the other press on the cover, and the cover is pressed on simultaneously by the S IQW in the middle, sle

and by the levers at the 2. An accumulator as claimed in claim 1, having a broad pressure piece which distributes the screw pressure over almost all the middle of the cover.

8. An accumulator as claimed in claim 1, in which the levers are so formed that they press on almost the whole width of the cover.

4:- An accumulator as claimed in claim 1, comprising a bridge member having a screw threaded hole, and engaging with the nearer arms of the levers and the pressure screw passing through the said screw threaded hole.

An accumulator as claimed in claim 1, having a bridge member which engages with the lever arms in such a manner that the system comprising the two levers, thepressure screw and the bridge member forms a single unit when detached from the cover. I

6. An accumulator as claimed in claim 1, in which the levers have V in combination with hook-like parts on the accumulator vessel which have slots, in which slots thesaid pins are inserted.

In testimony whereof I have signed my name to this specification.

. PAUL WOLF;

pins attached thereto i

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