US2022013A

US2022013A - Noiseless stop

Info

Publication number: US2022013A
Application number: US4699A
Authority: US
Inventors: Emery J Thomas
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-02-02
Filing date: 1935-02-02
Publication date: 1935-11-26
Anticipated expiration: 1952-11-26

Description

E. J. THQMAS NOISELESS STOP Filed Feb. 2, 1935 M In 3 [Mi/7) 7- 750M148;

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Patented Nov. 26, 1935 UNlTED sTATEs ear eNr ()F-FIC E- 3 Claims.

The invention aims to provide a new and improved projectable and retractible stop designed:

primarily for use upon a desk top, table top or similar support to prevent books, drawing boards and other articles from sliding by gravity when the support occupies an inclined position, the construction'being such that it may be quickly and easily projected to any desired extent or retracted with equal quickness and ease; all adjust ments of said stopbeing attainable without causing noise.

A further object of the invention is to provide exceptionally simple and inexpensive, yet efficient and durable means for holding the stop totally or partially projected, or fully retracted.

With the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, description being accomplished by reference to the accompanying drawmg.

Fig. 1 is a vertical sectional view partly in elevation showing the stop in retracted position.

Fig. 2 is a similar view showing the stop projected.

Fig. 3 is a horizontal sectional View on line 33 of Fig. 1.

Fig. 4 is a perspective view of the shaft and the enlargement thereof which is slidable in the tubular casing, a spring and balls which are confined in a bore within said enlargement being removed.

Only one form of construction has been shown for illustrative purposes, and it will be rather specifically, described, with the understanding however, that within the scope of the invention as claimed, minor variations may be made. Furthermore, although only one of the improved stops has been illustrated, it is to be understood that any desired number may be employed.

In the drawing above briefly described, the numeral 5 denotes a desk top, table top or other support whose obverse and reverse faces are denoted at 6 and 1 respectively. This support 5 is formed with a socket 8 which opens throughone face of the support 5, preferably through the reverse face 1, the other end of the socket being closed by leaving a portion of the support 5 standing when drilling or otherwise forming said socket. This portion which is identified at 9 is formed with a central relatively small opening Ill leading from the closed end of the socketthrough one face or the other of the support 5, through the obverse face 6 in the present showing.

A short tubular casing II, preferably cylindrical, is snugly fitted into the socket 8 and may beheld therein by friction :or in any other desired way. One end of this casing is closed by the portion 9 which forms theclosed end of the socket 8. The other end of the casing I! is provided withja suitable closure I 2 soldered or other- 5' wisesecured in place, said closure l2 being formed with'a central opening I3 preferably of the same size as the opening Ill. A shaft l4 somewhat longer than the thickness of the support 5, passes slidably through the openings .lfl and I 3 and is 10 provided with an enlargement I5 between its ends. This enlargement fits slidably in the tubular casing I I and corresponds in shape to said casing, being cylindrical in the present disclosure. The enlargement ltcoacts with the closed end 9 of the socket 8 in limiting the upward sliding of the shaft l4 and similarly coacts with the closure I2 in limiting the downward movement of said shaft. When the shaft is lowered, its upper end is preferably flush with the obverse face 6 of the support 5 as seen in Fig. 1, the lower end of said shaft then projecting below the reverse face I. Whenever use of the shaft is desired to prevent a book, drawing-board or other article from sliding by gravity on the face 6, it is simply necessary to push upwardly upon the lower end of the shaft, thereby upwardly projecting the shaft to any desired extent. For holding the shaft in any position to which it may be adjusted, novel provision is made.

A bore I6 is formed entirely through the enlargement I5, transversely of the shaft I4 and preferably at right angles to this shaft. The major portion of this bore is occupied by a compression spring ll and the ends of said bore receive two balls l8. By means of the spring l1, these balls are held in frictional contact with the side wall of the casing I I, with the result that the shaft M will be yieldably held in any position to which it may be slid. The shaft is not held with such pressure however, as to interfere with easy projection and retraction of said shaft as required.

Preferably the enlargement l 5 is provided with slight burrs I6 at the ends of the bore I6 to hold the balls IS in said bore before inserting the shaft I4 into the casing II, said burrs however being so positioned that they do not prevent proper engagement of said balls with the casing wall.

The device is exceptionally simple, inexpensive, convenient and durable, may be easily installed, and after installation is in readiness for instant use whenever necessary, and when its use is not required, it may be conveniently depressed to an out-of-the-way position.

As the details disclosed in the drawing have proven to be advantageous from numerous standpoints, they may well be followed. However, attention is again invited to the possibility of making variations Within the scope of the invention as claimed.

I claim:

1. In combination with a desk top, table top or similar support; a short tubular casing mounted in said support and of a length no greater than the thickness of said support, a shaft having an enlargement between its ends slidable within said casing, said shaft being somewhat longer than the thickness of said support to allow it to be pushed by hand and projected beyond either the obverse or the reverse face of said support, means closing the ends of said casing and co-operable with said enlargement to limit the sliding of the shaft, and yieldable means carried by said enlargement and frictionally engaging the side wall of said casing to hold said shaft in any position to which it may be slid.

2. In combination with a desk top, table top, or similar support, said support having a socket which opens through one of its faces and having a central relatively small opening from said socket to its other face; a short tubular casing fitted into said socket and having one end closed by the end wall of said socket, the other end of said casing being provided with a closure having a central opening, a shaft passing through both of said central openings and of a length greater than the thickness of said support to allow it to 5 be pushed by hand and projected beyond either the obverse or the reverse face of said support, said shaft having an enlargement slidable in said tubular casing for limiting the sliding of said shaft in either direction, and yieldable means carried by said enlargement and frictionally engaging the side wall of said casing to hold said shaft in any position to which it may be slid.

3. A stop of the class described comprising a short tubular casing to be inset in a table top, desk top or similar support in a position at right angles to the obverse and reverse faces of said support, a shaft of a length somewhat greater than the thickness of the support, said shaft having an enlargement between its ends fitting slidably in said tubular casing, said enlargement having a bore formed entirely therethrough transversely of said shaft, a compression spring occupying the major portion of said bore, and two balls occupying the ends of said bore respectively,

said balls being held in frictional contact with the side wall of said casing by means of said compression spring to hold said shaft when slid to project beyond either face of said support.

EMERY J. THOMAS.