US1336223A - Printer's furniture - Google Patents

Description

D. A. HAMPSON.

PRINTERS FURNITURE.

APPLICATION FILED Auma, I9I9.

,336J 23. Patented Apr. 6, 1920 l UL 22 A ,7 I. ll, wl l [Z11 "HQ, j

INVENTOR BY MM ATTORNEY UNITED STATES PATENT OFFICE.

DONALD A. HAMPS ON, OF MIDDLETO\VN, NEVI YORK, ASSIGNOR TO MORGANS & \VILCOX MFG. COMPANY, Oli MIDDLETOWN, NEW YORK, A CORPORATION OF NEW YORK.

'ramrnas' FURNITURE.

Application filed August 13, 1919.

To alt who/1t it may concern:

Be it known that I, DoxALD A. HAMrsoN, a citizen of the United States, residing at Middletown, in the county of Orange and State of New York, have invented a certain new and useful Improvement in Printers Furniture, of which the following is a speclfication.

The invention relates to furniture and quoins, and more particularly to job locks in which the separation of the base and head members in locking-up is effected by a screw on one member having ratchet threads engaged by spring actuated dogs on the other member, serving both as pawls for the ratchet and as a nut for the screw.

The mainobject of the invention is to provide a job-lock of this character in which the releasing means for operating the dogs, is so arranged as to occupy but little space and thusgreatly reduce the width of the job-lock and permit it to be employed in narrow spaces in locking-up a form.

Another important object is to present such releasing means in position for convenient and easy operation, and to apply the spring force through such means instead of directly upon the dogs.

The invention consists in certain novel features and details of construction and arrangement by which the above objects are attained, to be hereinafter described and claimed.

The accompanying drawings form-apart of this specification and show an approved form of the invention' Figure 1 is a plan or face view of the improved lock.

Fig. is a. vertical section taken on the line 22'in Fig. 1, and partly in elevation.

Fig. 3 is a face view corresponding to Fig. 1, and partly in horizontal section.

Fig. f is a perspective view of one of the dogs alone.

Fig. 5 is a perspective view of one'of the slides for operating the dogs.

Similar letters of reference indicate the same parts in all the figures.

The lock comprises two main portions. a base A and head B. the former having posts or extensions A at each side in which are cylindrical holes receiving corresponding arms B on the head, serving to guide the members and permit the lock to be expanded or contracted in. width by moving the head Specification of Letters Patent.

Patented Apr. 6, 1920.

Serial No. 317,249.

and base relatively to each other. The outer faces of both are plane and parallel and adapted to abut against the matter on one side and the inner face of the chase at the other. The posts A are connected by a hollow bridge A in which is received the screw C and the pawls or dogs D.

The screw is rotatably attached to the head B and extends midway between and parallel with the arms B Its threads are conical or angularly tapered, and it is adapted to serve both as a screw and as a cylindrical ratchet engaged by correspondingly shaped teeth on the adjacent faces of the oppositely placed dogs D pivotally mounted at one end on pins D extending through the bridge at points near the outer face of the base A.

Each dog is provided with a hole or recess (Z, beyond the pivot D in which is received a finger F on an arm F of a slide F.

The latter is preferably shaped of a narrow strip of metal bent in approximately U-form to embrace or partially inclose the base at one side. The base is grooved longi tudinally on its upper and lower surfaces, as at (6?, and the grooves receive the long arm F on one such face and the short arm F on the other face, the long arm of one slide lying on one such face and that of the other slide on the opposite face as shown, to permit the slides to be forced toward each other without interference in the act of swinging the dogs D on their pins D through the connection of the fingers F The bight of the slide F connecting the arms F F is provided at the center with a teat or slight protuberance F serving as a point of engagement for one end of a helical expansion spring Gr abutting at the opposite end against the adjacent post A in which it is received and held in a recess 0 The fingers F are engaged each with the dog D beyond the screw C so that the expansive effect of the springs G is to draw both dogs as a divided nut, into engagement with the threads of the screw, and to yield by drawing the slides inwardly and permit the dogs to act as pawls in separating the head and base.

The screw C has a knurled head C by which it may be turned by the fingers in adjusting the lock between the matter and chase and is provided with recesses 0 adapted to receive a pin or analogous implement. not shown, serving as a lever by which the ger to insure proper bearing and location,

and the required strong pressure attained by inserting the pin, not shown, in the recesses c and forcibly turning the screw,

.To release the lock the screw is relaxed by a reverse movement of the pin, and the slides F are both grasped between the finger and thumb and pressed inwardly to ward each other to swing the dogs D out of engagement with the screw, the members then may be easily and quickly forced together and the loekremoved.

It will be noted that the arrangement allows the lock to be quite narrow while permitting wide expansion, and that the slides I permit the application of the thumb and finger unobstructedly in effecting release. By locating the springs G between the slides and'base, theyare well protected and also easily accessible for renewal. The slides may be of steel or other metal having sufficient resilience to permit the engagement of their fingers with the dogs by simply springing their arms? F apart far enough to effect such engagement.

In a device of the character set forth, relatively movable head and base members, and guiding means therefor, a screw rotatablv mounted in ,said head member, dogs having teeth matching :to the threads of said "screw and pivotally'fmounted in said base member, and spring'actuated slides on said base, connected to said dogs for swingin the latter out of enga ement with said a V V L e screw.

2; In a device of the character set forth, relatively movable head and base'members,

and guiding means therefor, a screw rotatably mounted in said head member, dogs having teeth matching to the threads of said screw and pivotally mounted in said base member on opposite sides of said screw, slides on said base member each partially inclosing the latter and connected to the op; posite dog, and a spring for each slide tending to force its slide outwardly and draw said dogs toward each other.

3. In a device of the character set forth, relatively movable head and base members, and guiding means therefor,fa screw rotatably mounted in said head member, dogs having teeth matching to the threads of said screw and pivotally mounted in said base member on opposite sides of said screw, slides each having arms received and guided in grooves in said base member, a-finger on one of said arms engaged with the opposite dog, and a helical expansion spring between each of said slides and said base. 7

4. In a device of the character set forth, relatively movable head and base members, and guiding means therefor, a screw 7 rotatably mounted in said head member and having angular conicalthreads adapted to serve as a ratchet, dogs ha ving teeth match ing to such threads and pivotally mounted in said base member on opposite sides of said screw, slides havingarms received and guided in grooves in said base member and located on oppositefaces ofsaid base member, a finger'on one of said arms of each of said slides, engaged in a recess in the'opposite of said dogs, and a helical expansion spring between each of said slides and said ,base, tending througlrsaid "slides to' draw said dogs into engagement with said screw.

In testimony that I claim'the invention 7 above set forth I aflix my signature, in, presence of two witnesses.

r DONALD A. HAMPSON;

Witnesses: V p V x r FLOYD W; MoReA s, RICHARD KNIGHT.

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