US1284458A - Dry battery. - Google Patents

Description

E. HVROLLINSHON.

DRY BKITERY.

APPLICATION FILED AUG-3| 1917.

Patented Nov. 12, 1918.

maq ssa lf lflfillllllllun WHH HHr b hH II EARL H. ROLLINSON, 0F LYONS FARMS, NEW JERSEY.

DRY BATTERY.

Specification oi Letters Patent.

Patented Nov. 12, 1918.

Application filed August 3, 1917. Serial No. 184,188.

To all whom it may concern Be it known that I, EARL Hor'r Rollins-- soN, a citizen of the United States, residing at Lyons Farms, county of Essex, and State of New Jersey, have invented a new and useful Im rovement in Dry Batteries, of which the follbwing is a specification.

It is Well known that the modern dry cell battery deteriorates With age and quickly weakens when in use, and that after a period of rest, it will recuperate. Attempts have been made to mix with the depolarizing agent, an electrolyte; but this method has not proved satisfactory, with the result, that in many cases the cells are discarded, because they are thought to be completely exhausted, while in fact the cell only needs electrolyte of correct strength to start the chemical agent such action again.

Manufacturers of dry cells have somewhat standardized the construction of the cell, in the following particulars: The body of the container or anode is of sheet zinc rolled into tubular form, with a shallow cupshaped disk set into the bottom and soldered in place. The container is lined with absorbent paper and saturated with the excitin electrolyte. The carbon electrode or cafiiode is in the center of the cell, and surrounded with the depolarizing agent. The surface of the depolarizer is then covered with a layer of sand and a resinous wax is melted and poured overthe surface of the sand to the top of the container to keep it air tight in order to prevent evaporation of the electrolyte as much as possible. The container is then incased in a strawboard tube, when it is ready for use.

In my prior application Scr. No. 171,802, filed May 29th, 1917, I have set forth reasons why cells of the type just described may be given longer life, if inverted when in use and I have there described an improved form of battery holder, in which the cells are normally supported for use in inverted position. The said battery holder, and the above described cell, are admirably adapted for use in connection with my present improvement, which consists in perforating the shallow cup-shaped bottom of the container, placing therein an exciting chlorid), and providing a cover for the cellloottom. When saturated, with water the salt solution trickles through the perforations and is absorbed by the blotting paper as sal-ammoniac, (ammonium' lining where it serves as an effective exciting electrolyte. Actual tests show that the life of a cell may be lengthened 50% or more.

In carrying out my invention I make use of the devices and structures set forth in the following detailed description, and illustrated in the wherein:

Figure 1, is a side elevation partly in sec tion of a pair of cells mounted in a battery accompanying drawings,

holder similar to that described in my prior application, above referred to.

Fig. 2, is a section of another form.

Fig. 3, is a plan of a cell bottom, perforated for use in connection with my improvement.

Figs. 4, and 5, are respectively, plan views of the cover and capsule, illustrated in Fig. 2. I

Similar reference numerals refer to like parts throughout the description and drawlngs.

The cells 1, are the usual standard construction having the zinc container made up of the tube 2, into which the cup-shaped bottom 3, is soldered. The container is lined with blotting paper 4, and filled with the depolarizer 5, such as manganese dioxid with the carbon electrode 6, embedded in the center. The cup-shaped bottom 3 is perforated as at 7, and filled with the electrolyte so lution S. The cover 9, is then placed over the bottom of the cell, and which is placed in inverted position, as shown, into the aperture 10, of the battery holder 11, with the electrodes 12, ard 13, connected to the connector strips 14, and 15, respectively, which are secured to the under face of the holder 11, by means of the screws 16. When the electrolyte solution has become exhausted from the cup-shaped bottom of the cell, it may be replenished. The saturated solution of the exciting electrolyte trickles through the apertures 7, and is absorbed by the blotting paper lining 4, which serves to distribute it through the cell. The apertures 7, together with the aperture 17, in the cover afford a vent for gases generated in the cell when in use, and therefore serve to prevent the swelling and occasional bursting of the walls'of the cell, where it is otherwise hermetically sealed.

he improvement as thus far described is the form preferred, when the cell is completed as shown, at the factory with the exwith an electrolyte located in seitl c shaped bottom and lieltl in place by a taclmble cover.

3. A dry cell. having a perforated shaped bottom, in 00 lolnetion with all rated in Figs. 3, 4c, and 5, and consists ol the trol 'te plteecl in sel bottom outsltl= clip-member 19, having the circular corrucell ease, and e deiseheble cover t gution 26 in the bottom thereof, with e plu cell. for holding said electrolyte a rality of apertures 21, tl rethrough; the elispl e l citing electrolyte in place. But Where the electrolyte is to he applied to cells already in use, I n'efer to place the electr olyte in a capsule which may be securely fixed to the bottom of the Cell; Such a capsule is 1 as corrugation 20 forms :1 Che. mel for ontluoting the salt solution to the apert the bottom of the cell. The e over the cup-shaped, member 19, and v elatl with an offset :umuler the bottom the cell, and hel e capsule in place. lhe cover villecl Wi h an opellore ill, for the e: hatery lses. The capsule with tents either in granule or compressed t e Ollcells already in use; wh n put in use m (rte 1s lClflQCl to the contents of the capsule.

if dQSlIGfl, the cup-member and. cover rial? form, can be eheapl' nmnufscturecl, sml or copshapeol pei solel for a nominal price to be applied to nation with a. cap 45 containing an exciting t c s for s 1 1 '3 be permanently secur ct together W11? to be e to the electrolyte the ein, :eacly I in of a cell. To irete'the contents,

nle may be immelsezl 1n Wat moilients and it may then be '2 e cell as (I cribecl. 'fll pres ice the cup will be li'lill dry granulated sel l :1 compressed tablet of is hen poured over the J Q56:

as the case he, unti T saturated, when the coveri :OllllllOIl of the ele 0 will he 11ml: may as employed t place and that eh, ,g reel are merely ills-st is f my invelmoe; l battery cell.

1. A dry cell having means for supporting position, in combinetioi with rete cup-shaped bottom in come

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