US1159022A - Pin-protector. - Google Patents

Description

T. HAYASHI.

PIN PROTECTOR.

APPLICATION FILED MAR. 2. 1915.

Patented Nov. 2, 1915.

(June/wile:

COLUMBIA PLANOGRAPH co.,wAsH|Nu1'oN D c I 'on r V PIN-PROTECTOR.

Applicationfiled March 2, 1915 Serial No. 11,573.

a subject of the Emperor of Japan, residing at New. York, in the countyof New York and State of New York, have invented new and useful Improvements in Pin-Protectors, of which'the following is a specification.

This invention contemplates the provision of a safety attachment for pins capable of being readily and easily associated with the pointed end thereof to obviate casual separation of thepin from the object to which it is secured, as well as to prevent injury to persons coming in contact with the same, and which may be easily removed when desired. In carrying out my invention I aim to provide a device of this character which automatic'ally grips the pin when the'parts are operatively associated, any outward pressure on the pin in an attempt to withdraw the same, serving to render the device more effective in its purpose, I V

Another object of the invention resides in the provision of a device of this character constructed to be renderedtemporarily inoperative to permit separation ofthe device from the pin when desired. 7

Other objects will appearas the nature of the invention is better understood from the following description wherein the construction and arrangement of parts are more fully set forth.

In the drawing forming part of this application like numerals of reference indicate similar parts in the several views wherein Figure 1 is a longitudinal sectional view through the device showing the normal position of parts' F ig; 2 is a perspective view of the plunger. Fig. 3 is a transverse sectional view taken on line a-a of Fig. 1.

Fig. 4 is a longitudinal sectional view through the device showing the positionof parts topermit release of the pin.

The device forming the subject matter of my invention comprises a casing 5 which may be constructed of any suitable material and desired formation. However as shown I in this particular instance the casing is divided into compartments .6 and 7 respectively by means of the partition 8, that portion of the casing defining the compartment 6 being substantially of conical formation. The partition 8 is provided with a central opening 9 through which the plunger 10 is slidably mounted, the latter together with the balls 11 constituting a clutch adapted to Specification of Letters Patent.

Patented Nov. 2, 1915.

automatically grip thepin 12,up on insertion of the same within the casing in a manner presently'described. The plunger 10 is provided with a longitudinally extending bore 13 disposed in axial .alinement with the cone-shaped opening-in theend v a-11 1 4 of the casing. Encircling the plunger 101s a coil spring 15 having one terminal fixed to the flange 16 at one end of the plunger, andits opposite end fixed to the partition 8, this s'rarns PA E T OFFIC v.

TOYOKICHI HAYASI-II, or YORK, N. Y.

spring operating to normally maintain the plunger in the position shown in Fig- 1. The flange 16 is channeled as at 17, and arranged within this channel arethe balls 11.

Upon reference to Fig. 1 it will'be noted that, V A

these balls in normal position are confined between the flange 1,6 of the plunger and the end wall 14 of the casing, in such relative position that the space betweenthe balls is considerably less than the diameter of the pin 12. By reason of this construction it will be obviousthat when the pin is inserted .withinthe casing, the balls 11 and plunger 10 are forced inwardly against the action of the coil spring 15 until the balls 11 separate the required distance to permit the pinto enter the bore 13 of the plunger, whereuponthe spring 15 operates to return the plunger and balls to normal position and into efiective engagement with the pin. Theballs 11 during this operation are guided in their movement by the tapered walls of the casin 5, which direct the balls into the channel 1 upon return movement of the plunger to operative position, whereby these balls are held in proper gripping relation. The construction of the clutch is such that any out Ward pressure upon the pin inan effort to withdraw thesame from the casing only tends to increase the gripping action ofv the clutchupon thepin. V r

Arranged within the compartment 7 is a tube 18 disposed at a right angle to the plunger 10 and closed at its lower end thereby. Positioned within the tube 18 is a coil spring 19 having one end bearing against the casing 5 and its opposite end secured to the plate 21 which is mounted for sliding movement within the tube. The plate 21 exerts pressure against the ball 22 normally I maintaining the latter in engagement with NOW When it is desired to remove the pin from the device, the pin is forced inwardly moving the plunger 10 and balls 11 to the position indicated in Fig. i, and at which time the ball 22 Within the tube 18 is forced under action of the spring 19 Within the semicircular recess :28 of the plunger 10,

temporarily locking the plunger in its adjusted position to permit the pin to be separated from the device by quickly Withdrawing the pin from the casing. Subsequent to the Withdrawal of the pin from the casing, the spring 15 operates to return the plunger 10 and the balls 11 to normal position, this spring being much stronger than the spring 19 overcomes-the resistance of the latter, and during the return movement of the plunger 10 the ball 22 is forced out of the recess 28 and Within the tube 18. As hereinaoove stated the terminals of the spring 15 are secured to the partition 8, and flange 16 of the plunger, whereby twisting or turning of the plunger 8 is obviated, and the recess 23 held in proper position to travel directly beneath the open end of the tube 18 upon adjustment of the plunger 10.

The bore 13 of the plunger is restricted at its=rear end as at 2% to prevent the pin from being passed through the opposite end of the plunger 10, and thereby protect the pointed end of the pin from being blunted or otherwise injured by coming in contact with the casing 5;

- It is believed that from the foregoing description the nature and advantages of the invention Will be readily apparent Without requiring a more extended explanation and therefore the same has been omitted. However I desire to have it understood that I do not limit myself to the precise construction and arrangement of parts herein illustrated and described, as various changes may be resorted to when desired as fall Within the scope of the appended claims.

What is claimed is 1. A pin protector comprising a casing adaptedto receive said pin, a clutch movable longitudinally Within said casing for automatic engagement With said pin, and means cooperating With said clutch on a predetermined position thereof to render said clutch temporarily inoperative to permit the pin to be Withdrawn from the casin 2. A pin protector comprising a casing to receive the pin, a spring pressed clutch arranged Within the casing and movable longitudinally thereof for automatic engagement with said pin, means for rendering said clutch temporarily inoperative on a predetermined adjusted position of the clutch against tension of said spring, and said spring operating to release said means and return said clutch to normal position.

A pin protector comprising a casing adapted to receive the pin, a clutch arranged therein for automatic engagement with said pin and including a spring pressed plunger, said plunger having a recess in one side t iereof, and a spring pressed locking element adapted to enter said recess on a predetermined adjusted position of the plunger to temporarily render saidclutch inoperative to permit the pin to be Withdrawn from the casing. 7

4-. A pin protector comprising a casing adapted to receive the pin, a clutch arranged therein for automatic engagement With said pin and including a plunger movable longitudinally thereof, a spring encircling said plunger and normally maintaining the clutch in operative position, said plunger having a recess in one side thereof, a spring pressed locking element adapted to enter said recess on a predetermined adjusted position of the plunger to temporarilyrender said clutch inoperative to permit Withdrawal of the pin from the casing, and said first mentioned spring operating to return said clutch to normal position subsequent to the separation of the pin therefrom.

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

' TOYOKICHI HAYASHI.

Witnesses 1 JOHN D. DOUGLASS, AnNA V. DOYLE.

Copies of this patent may be obtained for five cents each, lay-addressing the fifl onunissioner of Patents,

Washington, D. 0. a

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