US1142208A - Plate-hook. - Google Patents

Description

B.F.UPHAM.

PLATE HOOK.

APPLICATION FILED APR. I5, |914. 193.43268. Patented June 8, 1915.

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BURT F. UPHAM, OF BOSTON, MASSACHUSETTS, ASSIG'NORVTO UNITED :PRINTING MACHINERY CO., 0F BOSTON, MASSACHUSETTS, A CORPORATION 0F MASSACHU- SETTS.

PLATE-HOOK.

T0 all whom it may concern:

Be it known that I, BURT F. UPHAM, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Plate-Hooks; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form part of this specification.

Thisinvention Vis a novel plate-hook or clamp particularly designed for use in securing printingplates to the plate cylinders or beds of printing presses; and its object is to provide a strong, simple, and easily applied hool. f

"The novel hook embodies a body portion that can be readily engaged with the retaining grooves in the cylinder or bed to which the plate is to be attached; and which is provided with means for securely clamping it within such groove after its insertion therein; and to this body is connected plateengaging portions or vclamp-members, so arranged' that when the body-portion is inserted into the groove and then turned to secure it therein the clamp-members will lie in plate engaging position, and after the plate is properly positioned the hook may be clamped in place by means of a clamping screw within the body; and if it should be desired to shift the` plate or hook slightly it can easily be done by driving the hooks along the grooves.

The invention will be clearly understood from the following description and the accompanying drawings; vand the essential features for which protection is desired are set forth in the claims.

Tn said drawings Figure 1 is a plan view of a part of the grooved surface of a bed or cylinder to which printing-plates are to be attached, and showing my novel hooks securing such plates thereto. Fig. 2 is an enlarged perspective view of a plate hook detached. Fig. 3 is an enlarged vertical section on the line 3 8, Fig. 1. Fig. 4 is a section on the line 4-4, Fig. 1.

The hook comprises a body portion 1 which is of a. width slightly less than the width of the mouth s of the inverted T- slots S in the bed or cylinder to which the printing plates are to be attached; the body is longer than it is wide so that when it is Specification of Letters Patent.

inserted into the slot and then turned at right angles thereto it will be held therein, by reason of the engagement of the ends of the body -under the overhanging edges of the top ianges of the slot at each side of the mouth thereof. ASaid slots s are practically T-shaped and have'their mouths narrowerV than the width of the major portion of the slots, as shown. This body 1 is provided with a cylindric projection or collar 2 on its upper end, formed integral with the body, and above this collar and projecting in 0pposite directions vtherefrom are clamps 3, which are lpreferably beveled on their side edges to engage the edges of the plates. Said clamps project from the collar 2 at such an angle to the longest axis of the body 1 that when the body is inserted in a slot and turned at right angles thereto, said clamps will lie at an angle of about 45O to the slot, or parallel with the aXis of the cylinder, so that they will properly engage the edges of the printing plates P upon the cylinder or bed, as indicated in Fig. 1. The

said parts of the hook are all preferably f ormed integral, and the clamps may practically be one, but are slightly separated at their inner ends for a purpose hereinafter explained.

The body has an internally threaded recess or socket in its under side, in which is placed a clamp bolt 4, which is adapted to be engaged by a suitable tool inserted through an opening 5 in the upper end of the block and between the clamps 3, as indicated in Fig. 3; and this bolt 4 can be retracted into the socket when it is desired to remove or insert the body in a groove; and after the body is inserted in a groove and the hook properly positioned, the bolt 4 can be projected so as to clamp the body firmly between the top and bottom walls of the slot as indicated in Fig. 3.

A hook may be shifted slightly along the slot-without loosening the bolt 4-by means of a tool as T (Fig. 4) having a reduced end t which can be engaged with the-opening 5 of the hook, and when so engaged by striking the outer end of the tool T with a hammer the hook can be forced along the slot. These hooks can be easily inserted in position and readily adjusted along the slots and the plates adjusted to the desired position, and then locked as described; and if it is necessary to shift the plate slightly in j Patented June 8, 1915.

Application led April 15, 1914. Serial N o. 832,028.

sol

order to obtain register this can be done by driving the hooks along the slots by means of the tool T, in the desired direction.

What I claim is:

l. A plate hook comprising a body portion adapted to be inserted into a slot, and a clamp member above the slot, said hook having a recess adapted to be engaged by the bent end of a separable driving tool whereby when so engaged the hook can be forced along the slot by striking the tool with a hammer.

2. A plate hook having a bodyv portion adapted to be inserted in a slot through the contracted mouth thereof and turned at an angle thereto and provided with a clamp member on its outer end above the slot, and

vhaving a recess extending through the clamp .slot through the-contracted mouth thereof and'then turned at an angle thereto to retain it in the slot, a clamp member on the upat an angle to the length of the body portion,

said hook having a vertical opening extend- (Jopies of this patent may be obtained for ve cents each, by addressing the Commissioner ofrlatents.k

ing through said clamp member and body for engagement with a hook adjusting tool, y

the lower portion of said opening within the body being threaded; and a bolt in the threaded portion of said opening adapted to end of the body adapted toflie within the mouth of the slot, a clamp member on the outer end of the collar above the slot and integral therewith, said clamp ymember ly? ing at an angle to the length of the body portion; said hook having an opening eX- tending through said clamp member, collar and body, for engagement with a hook adjusting tool, the lowerpart of the opening within the body being threaded; and a bolt in the threaded portion of said opening adapted to be projected to engage the bottom of the slot and lock the hoolrtherein, substantially as described. V

In testimony that I claim the foregoing as my own, I aiiX my signature in presence of two witnesses.

BURTF. UPHAM. Witnesses: i Y

HERMANN A. DoLBEAs, JOHN COLDER.

Washington, D. C.

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