US2939668A - Article holding devices controlled by shock - Google Patents

Description

June 7, 1960 o. L. A. DRIVER v2,939,558

ARTICLE HOLDING'DEVICES CONTROLLED BY snocx Filed June 1, 1956 D.L.A. DRI ER United St -ES Patent ARTICLE HOLDING DEVICES CONTROLLED BY SHOCK Douglas LouisAshton Driver, London, England, assignor to International Standard Electric'Corporation, New n York, N.Y., a corporation of Delaware Filed June 1, 1956, Ser. No. 588,856

Claims priority, application Great Britain June 24, 1955 *4 claims. (Cl. 248316) This invention relates to locking devices controlled by shock.

According to one aspect of the invention, there is which prevents the telephone being dislodged by the shock caused by a salvo fired from the ship, or by the explosion of a depth-charge near the ship which does, not impair the use of the telephone at other times.

The invention will now be described with reference to the accompanying drawings in which: 7 7

Figs. 1A and 1B are sectional plan views of two forms of mounting for hand telephones in accordance with-the invention,

Figs. 2, 3 are elevational views of the two devices Figs. 1A and 1B. 7

The device shown in Fig. 1A and .each spring to be adjusted individually. The locking in 2 comprises, a locking member 1 suspended by two pairs of helical j 2,939,668 Patented June 7,

The telephone 15 however is not rigidly attached to the framework4 and there may be a tendency to relative movement between the telephone and the framework under shock, resulting in displacement of the clip 12'and the disc-8. It is' therefore essential to ensure that the locking member 1 traps the disc 8 in the recess 7 bebore the disc 8 has been able to enter the bore 6. This can'be achieved ifthedifierence in diameter of thc' disc 8 and thebore '6fis small and less than the difference between the thickness of the disc 8 and the depth of the recess7.

When the shock has passed the locking member 1 andithe'rod 9 resume their original relative positions, so

than-the disc 8 is tree-to move down the bore 6.

T The'device so far described will respond to any shock which displaces'the locking member -1 in any direction in the-plane in which-the locking member is free to move. The device, however, will not respond to a shock perpendicular to this plane. A second identical device-is therefore provided so as to be responsive to shock in direction; The two devices at right angles to each other are together responsive to shock from any direction. a The poistion of the second device is shown in ,Fig; 1B; Each device'controls one clip 12 of a pair V to provide a mounting fora telephone on' board a ship I of clips, both of which must be displaced to permit removal of the telephone. The two devices together, therefore, constitute apparatus which holds the telephone 15 .in position during shock from any direction.

I as before, a bore 6 and a recess 7, as supported within member 1 has a hollow cylindrical bore 6, the diameter of which is enlarged at one end to form a recess 7. A disc 8, normally housed in therecess 7 and having a diameter slightly less than that of the bore 6, is carried which clips nust be displaced, as shown by dottedlines,

to removethehandmicrotelephohe When the telephone 15 is removed, the 12 dis- I placed against the action of the spring 11 and the disc 8, travels down the bore 6. I The required alignment is obtained by means of the adjusting screws 5 ofthe springs 2. Suppose, now, that the structure (e.g. a ship), to which the framework 4 is attached, is sub-. mitted to shock when the telephone 15 is in, the'position shown in Fig. l. The structure and the framework 4 move under the influence of the shock. The locking member 1 remains stationary due to its inertia and the accommodating action of the springs 2. The resulting movement of the locking member 1 relative to the rod 9, places the bore 6 out of alignment with the disc 8 which is consequently held captive in the recess 7 and prevents displacement of the clip 12.

' ventiom a cylindrical drum 16 by a coiled spring 22. The coil is tapered towards its middle portion where contact is made with the locking member 1. A rod 9, carrying, as

before, a disc 8, is capable of axial movement in a hole in the framework 4 and in a hole in a plate 17. A compression spring 11 is housed within the bore 6. The

- plate 17 is secured to the framework 4 by'screws 18 which engage holes tapped in the framework 4. Two flange members 19, 20-provide end-seatings for the drum 16fand have holes 21 which are a loose fit around the screws 18. The flange member 20 is extended centrally to provide a sliding surface for the locking member 1. Alignment of the bore 6 and the disc 8 is obtained by means of the play in the holes 21. When alignment has been secured, the screws 18 are tightened home. The device operates in the same way as the device already described,the coiled spring 22 acting in place of the pairs of springs 2. The device can also be used in pairs to provide apparatus responsive to shock in any direction.

While the principles of the invention have been described above in connection with specific embodiments,

and particular modifications thereof, it is to be clearly understood that this description is made only by way, of example and not as alimitation on the scope of the in What is claimed is: I I r 1. Apparatus for retaining a movable object during shock comprising a movable latch element, a pair of movable members, each movable in directions normal to normally retains said object in a fixed position, and

means coupled to the other of said members :fOl' normally maintaining the locking portion of said second member out of cooperationwith the locking portion of 7 said first member whereby said latch element may normally be moved to unlatch said object but which, during :;ment of said latch element.

- Apparatus for retaining a movable object as claimed in, claim 1, further comprising a fixed frame having a pair of parallel arms, said s'econd member positioned intermediate said arms, said first member movable in .directions transversely of said arms.

3. Apparatus for retaining .a movable object during shock comprising a fixed frame having two pairs of parallel arms, the arms of one pair being at right angles to the arms of the other ,pair, a pair of movable latch elements coupled to said arm pairs, respectively, for normally retaining said movable. object in a fixed position, a pair of spring loaded rods, each operatively associated with a difierent one of said latch elements for normally urging said elements into retaining engagement with said object, each of said rods adapted to move in directions normal to the arms of said frame Withwhich it is associated, said rods having a first locking portion and normally being movable when it is desired to remove said object from said fixed position, a pair or locking members, each associated with a different pair of the arms of said frame, each said locking member adapted to move in directions parallel to the arms or said frame with which it is associated, each of said locking members having a second locking portion substantially complementary to the first locking portion associated with said rods, resilient means for normalliy maintaining out of engagement the locking portions of said rods and said locking members whereby said latch elements may be unlatched to permit said object to be moved from said fixed position, either of said locking 'me'inb'ers adapted, when moved in either direction parallel to the arms of said frame with wln'ch it is associated, in response to shock, to prevent movement of the associated "rod.

4. Apparatus for retaining a movable object as claimed in claim 3, wherein said second movable member comprises a block having a cylindrical bore and a circular recess in said block having a diameter greater than the diameter of said bore, the locking portion associated with said first member having a dimension slightly smaller than the diameter of said bore, the bottom of said circular recess comprising said locking portion or said second member.

References Cited in the fire "of this atent UNITED STATES PATENTS

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