US1726704A - Safety catch for pin stems - Google Patents

Description

SAFETY CATCH FOR PIN STEMS Filed Nov. 10, 1928 s=0/ye 4 as. $919 BY 4 Mus. w

Patented Sept. 3, 1929.

UNITED STATES 1,726,704 PATENT OFFICE.

GEORGE W. JENGKES, OF LAKEWOOD, RHODE ISLAND, ASSIGNOR TOD. M. WATKINS 00., INCL, OF PROVIDENCE, RHODE ISLAND, A CORPORATION OF RHODE ISLAND.

SAFETY CATCH FOR PIN STEMS.

Application filed November 10, 1928. Serial No. 318,396.

This invention relates to an improved safety catch for pin stems; and has for its object to provide in such a catch a keeper member having a body portion with a central opening with a radially disposed slot leading thereinto, the body also having a supporting base portion extending laterally a substantial distance from one of the faces of the body portion. A guard member is rotatably mounted in the keeper opening having a head on either side of the keeper body. This guard member has a radially disposed slot therein for the reception of the end of the pin stem and the guard is provided with an op crating handle arranged to swing between spaced stop arms on the keeper to limit the rotating movement of the guard to bring its slot into and out of registration with the slot of the keeper to admit the pointed end of the pin stem and then look it in position.

i A further object of the invention is to provide the body member of the keeper with a pair of laterally extending stop arms positioned to overlie the lateral extension of the base portion and to provide the guard which is rotatable in the keeper with a thin head on one side of the keeper body and a relatively thick counterbalanced head on the opposite side of the keeper body to overlie the lateral base extension, the outer surface of this thicker head being substantially flush with the corresponding surface of this base extension whereby the catch memberis balanced to support itself'upon its base during a soldering operation of this base to a pin or brooch.

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings:

Fig. 1 is a perspective view showing my improved safety catch with the slot of the guard swung out of registration with the slot in the keeper.

Fig. 2 is a perspective view of the keeper with the guard removed.

Fig. 3 is an edge view of the guard.

Fig. 4 is a sectional elevation of the guard.

Fig. 5 is a perspective view of the guard member.

Fig. 6 shows the keeper member as having its slot opened or spread to receive the body of the guard member which is shown in sectlon.

Fig. 7 shows the keeper member as closed over the body of the guard member, the latter being in section.

Fig. 8 is a sectional elevation showing the guard member mounted in the keeper.

Fig. 9 is a perspective view showing an elongated bar or rod which has been rolled or drawn into the desired shape ready to be mounted in a screw machine to be bored, counterbored and cut off as a screw machine operation.

Fig. 10 is a perspective View showing the previously prepared rod from which the guard members are formed to be drilled, tupned and cut off as a screw machine produc F 11 illustrates the keeper rod partly in section as having been drilled, bored and a section partly severed from the rod.

It is found in the practical construction of parts of a safety catch, of advantage to form the two parts from different rods as screw machine products, that- 'is to first form a rod by drawing or otherwise into the desired shape lengthwise, then to mount this rod in a screw-machine to be bored, counterbored and severed to form the keeper members; the guard members are formed from a somewhat similar rod by being drilled, a groove turned therein and finally severed to the desired lengths, the different members then being collected and slotted; finally the guard is mounted in the keeper to rotate therein. One essential feature in the construction of catches of this character is that the parts be so balanced that the catch will stand firmly on its own base by its own weight to support itself in the desired set position during the soldering operation by which the catch is secured in its working position on the pin or brooch. If a catch is not properly balanced andwill not withstand the air pressure from the heating blow torch, the catch is considered impracticable as too much time is consumed in this soldering operation if the catch will not stand unsupported. To accomplish the balancing of this catch in a simple and practical way, I have counterbored into the base of the body portion of the keeper member, and into the ribs which form the stop arms, which causes 'both the stop arms and the base to extend laterally a substantial distance from the inner face of the keeper. I also form one head of the guard member very thin and its other head relatively thick to overlie the laterally extending base and so serve to balance the catch to rest firmly upon this base and support itself during a soldering opemtion; and the following is a detailed description of the present embodiment of my invention showing one arrangement by which these advantageous results may be accomplished l Vith reference to the drawings, designates the previously prepared rod or bar fromwhich the keeper members are formed, preferably as a screw-machine product by first mounting-the rod in the screw machine then drilling its center as at 11 and counterboring one face of the same which counterboring causes the base portion 12 to extend laterally as at 13 from the face 14 of the keeper; also this counterboring serves to undercut the stop lugs 15 causing them to extend laterally beyond this face 14:. The required section of this prepared stock is then severed from the bar to form the keeper member which is subsequently radially slotted as at 16. I

The guard member 17 is formed from the previously prepared bar 18, see Fig. 10, which is like the keeper mounted in a screw machine and is first drilled to form a central hole 19, then turned to form a groove 20 with a body portion 21 having a thin head 22 at one end and a relatively thick head '23 on its opposite end, leaving a portion of the rib 24 which now forms the operating handle 25 on the guard.

This guard is subsequently slotted as at 26 to receive the pin of the pin stem (not shown); In assembling the guard and the keeper, I open the slot 16 of the keeper, as best illustrated in Fig. 6, sufficiently to permit the body '21 of the guard to pass thereinto and subsequently close this keeper about the body of the guard, as illustrated in Fig. 7, leaving the guard sufficiently free to rotate readily in its keeper.

The operating handle 25 of the guard is now in position to work between the spaced stop arms 15 in the keeper whereby when the arm 25 is c'arriedback against the rear arm 15, its slot 26 registers with the slot 16 in the keeper, permitting free passageway of the pin stem thereinto, then when arm 25 of the guard is swung forwardly'against the front arm 15 of the keeper, its radial slot 26 is moved out of registration with the slot 16 of the keeper, thereby locking the pin stem therein.

By my improved construction, it will be seen that 1 have provided a base 12 with a broad supporting surface 27, I have mounted the guard member with its relatively thick and heavy head 22 in position to overlie this base portion to so balance the catch that it will rest firmly upon its base and support itself against the air pressure of the blow to rch during the soldering operation.

My improved safety catch is very simple. practical and inexpensive in construction and is effective in its operation.

The foregoing description is directed solely towards the construction illustrated, but 1 desire it. to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the invention being defined and limited only by the terms of the appended claims.

I claim:

1. A safety catch for pinstems comprising a keeper member having a body portion with a central opening and a radially disposed slot leading into said opening, said body portion having an attaching base and spaced stops extending laterally a substantial dis tance from one of its side faces, a guard member rotatably mounted in said keeper opening and having a head on either side thereof, saidguard member having a central pin tongue receiving opening therethru and slotted substantially radially to communicate with said opening, and an operating handle on Said guard having a path of movement between said laterally extending stops to limit the rotating movement of said guard and to bring its slot. into and out of registration with the slot in said keeper.

2. A safety catch for pinstems comprising a keeper member having a body portion with a central opening-and a substantially radially disposed slot leading thereinto, said body having an attaching base extending laterally a substantial distance from one of its side faces and a pair of spaced laterally-extending stop arms overlying said base extension, a guard member rotatably mounted in the central opening of said keeper within said laterally extending portions thereof and radially slotted to its center, and an operating handle on said guard rotatably positioned between said stop arms to bring its slot into and out of registration with the slot in said keeper.

3. A safety catch for pinstems comprising a keeper member having a body portion with a central'opening and a radially disposed slot communicating therewith, said body having an attaching base portion flush with one side face of the body and extending laterally a substantial distance from the other side face thereof,- a pair of laterally extending stop arms on said body overhanging said lateral base extension, a guard member rotatably mounted in the central opening of the keeper and having a thin head on one side of the keeper body and a relatively thick counterbalancing head on the opposite side of the keeper body to overlie the lateral base extension with its outer face substantially flush With the corresponding face of the base extension, said guard being radially slotted to receive the pinstem and provided With an operating handle Working between said stop arm on the keeper to limit the rotation 01' the guard to bring its slot into and out of registration With the slot in said keeper.

4. A safety catch for pinstems comprising a keeper member having a body portion With a central opening and a substantially radially disposed slot leading thereinto, said body having an attaching base extending lateral- 1y a substantial distance from one of its side faces and a pair of limiting stop arms, a guard member rotatably mounted in the central opening of said keeper above said laterally extending base, and radially slotted to its center, and an operating handle on said guard rotatably positioned between said limiting stop arms to bring the guard slot 20 into and out of registration with the keeper. In testimony whereof I aflix my signature.

GEORGE WV. JENCKES.

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