US1011054A - Lever disk stopper. - Google Patents

Description

E. GUTHRIE.

LEVER DISK STOPPER. APPLICATION FILED SEPT. 18, 1911,

1,011,054, I Patented Dec. 5,1911.

EDWIN GUTHRIE, OF WASHINGTON, DISTRICT OF COLUMBIA.

LEVER, DISK STOPPER.

To all whom it may concern:

Be it known that I, EDWIN GUTHRIE, a citizen of the United States, residing at Washington, in the District of Columbia, have invented certain new and useful Improvements in Lever Disk Stoppers, of which the following is a specification.

This invention relates to lever disk stoppers, and belongs to the class of paper disk stoppers used by dairymen to close milk bottles. 7

The object of this invention is the production of a disk stopper which may be displaced by pressure of the finger upon a certain portion of its exposed surface, the greater part of the disk being constructed and arranged to act as a lever whereby one portion is raised out of the mouth of the bottle, and within reach of the fingers, as more fully explained hereinbelow.

The preferred construction of this inven tion is set forth in the accompanying drawings, of which Figure 1 represents a bottom plan view of one form in which this invention may be made. Fig. 2 represents a bottom plan view of a modification of this invent-ion. Fig. 3 is a cross-section on'line w-w of Fig. 1. Fig. 4 is a cross-section on line y' z of Fig. 2. Fig. 5 is a top plan view of the mouth of a milk bottle with this invention applied. Fig. 6 is a vertical section of the mouth of a milk bottle with this invention applied.

The same reference letter designates the same part through the description and drawings.

The disk A, usually of pasteboard, has a portion or portions on one side in some way weakened, in order that they may give away when pressed upon. For example, the diagonal cuts or channels B, 6, are formed, ordinarily, in the lower surface of the disk, as shown in Figs. 1 and 3. Or, the same weakening effect may be brought about by removing a portion of the layers of the pasteboard, leaving a relatively thin layer, such as that marked D in Fig. 4 near the edge, the removed portion and the remaining layer D having the form and extent of the filling E, consisting in practice of paraflin wax. The filling E renders the disk of the same thickness throughout, but, enables the edge portion to be broken down under pressure. In Fig. 4, the disk is designated by the letter C. The preferred construction is to weaken the edge portion or Specification of Letters Patent.

Application filed September 18, 1911.

Patented Dec. 5, 1911. Serial No. 649,978.

portions by the cuts or indentations mentioned.

In Fig. 5 the mouth of the bottle F is shown closed by a disk constructed in accordance with this invention. The point a at which the opening pressure is to be applied, is ordinarily indicated in some manner, for example, by the cross-mark and the word- Press as illustrated.

To explain the operation of this invention, let it be assumed that pressure of finger or thumb is applied at the point a. The cuts B and Z) will yield, and the edge portions of the disk G and 9 will be turned up, as will also the portion J between the ends of the cuts B and 6 near the periphery of the disk. The yielding of the parts allows the portion of the disk pressed upon to move downwardly with the pressure. as indicated by the arrow in Fig. 6, and the two points or portions of the disk marked H and h, and shown in Figs. 1 and 5, act as fulcrums and the greater portion of the disk as a lever, with the result that the other portion of the disk from that part pressed upon is raised out of the mouth of the bottle within easy reach of the end of the finger, and is readily removed. It will be noted that the weakened portion of the disk lies upon one side of a line joining the pivotal points or fulcrums H and h, and pressure upon the weakened side causes it to give away and descend, the disk acting as a lever on the opposite points H and h.

It will be noted in Figs. 1 and 5, that while the cuts B and b converge, they do not quite meet, but that the portion J of the edge remains between them. The reason for separating the ends of the cuts is that it has been determined by a number of trials that if the cuts meet, the port-ion marked J would be correspondingly reduced, and, upon pres sure, it yields too quickly after a certain pressure is reached, and the disk jumps out of the mouth of the bottle. That condition of things is not desirable for the reasons, first, that the disk falls to the floor and is soiled, and, second, if the disk jumps out too quickly under pressure, the end of the finger may descend into the milk or cream. By trial, it has been determined that about the arrangement of parts illustrated gives the best results. The weakened portion of the disk yields gradually downwardly while the opposite portion rises correspondingly within reach of the finger, and the disk is easily removed and may be used over again. In practice, the disks are immersed in melted paraflin after the cuts are made, and the cuts are filled up, making the disk sufiiciently stiff to act effectively as a closure in the common way.

Having now described this invention, and explained the mode of its operation, what I claim is 1. The combination with a bottle constructed to be closed by a disk stopper, of a disk stopper having opposite portions arranged to act as pivotal points in the mouth of the bottle, a portion of the disk upon one side of a line joining said pivotal points being constructed weaker than the other portions whereby pressure upon the weakened portion will cause that portion to descend'into the bottle and the stopper to operate as a lever upon said pivotal points.

2. The combination with a bottle constructed to be closed by a disk stopper, of a disk stopper having one portion provided with edge portions demarcated by converging lines constructed weaker than the other portions whereby pressure applied at a predetermined point will cause the greater portion of the disk to act as a lever in the mouth of a bottle, the said demarcated portions yielding to the pressure and allowing one portion of the disk to descend and the opposite portion to rise.

3. The combination with a bottle having in its mouth an annular shoulder, of a disk stopper having portions near the edge constructed weaker than the other portions whereby pressure upon the weakened portion will cause the greater portion of the disk to act as a lever upon the said annular shoulder and the said weakened portion of the disk to descend and the opposite portion to rise.

In testimony whereof I aflix my signature in presence of two witnesses.

EDWIN GUTHRIE.

W'itnesses: GEORGE J. JOHNSTON JAMES J. KEANE.

Copies of this patent ma; be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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