US2593575A - Printing chase - Google Patents

Description

April 22, 1952 Filed March 5, 1948 c. L. LANCE 2,593,575

PRINTING CHASE 2 SHEETS-SHEET 1 20 I Z 37% e f 'z n v o 32 4/ 9 4 m A m i5 L4 Liz &

3mm Ch esfer L Lance (ltlomeya April 22, 1952 c. LANCE PRINTING CHASE 2 SHEETS-SHEET 2 Filed March 5, 1948 INVENTOR. C/7es2er L. Lance ATTORNEYS Patented Apr. 22, 1952 UNITED STATES PATENT OFFICE 9 Claims. (Cl. 101-393) This invention relates to new and useful improvements in printing chases.

In making up a printing chase, considerable blocking of furniture is necessary because of the use of cuts, type forms, boxes, borders and the like. To position these elements properly, it has been customary in many instances to use crossbars having their ends dovetailed in the inner faces of the chase frame. However, such dovetailing required precision fitting which made the bars difficult to place and remove and did not provide any play or flexibility, or compensate for wear.

One object of the invention is to provide an improved printing chase having crossbars and connecting bars seated in the inner faces of the chase frame so as to be easily placed in and removed from the frame and not requiring a precision fit, and difiic-ult application.

Another object of the invention is to provide an improved chase wherein the crossbars are provided with looking members at their ends adapted to engage in recesses in the inner faces of the chase frame and movable so as to lock the bars in the frame or release said bars from the frame, whereby the bars maybe readily and quickly posisioned, locked or unlocked, and wear of the parts compensated, thus assuring at all times a choice of positions and securely locked barsr A further object of the invention is to provid connecting bars each having one end seated in a face of the frame and the opposite end seated in the side of a crossbar and provided with means, whereby sufficient elongation or longitudinal spring is given the connecting bar to permit it to be freely placed and removed when the crossbar is unlocked, and to be tightened when said crossbar is locked in place.

Still another object of the invention is to provide an improved chase wherein the frame is provided with looking recesses and the crossbars have movable locking members at their end provided with Wedge tenons or lugs adapted to wedge in the recesses and securely lock the bars in the frame when the members are moved to locking positions, thus making for ready and tight looking of the bars and easy removal thereof.

A construction designed to carry out the invention' will be hereinafter described together with other features of the invention.

The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings, wherein an example of the invention is shown, and wherein:

Fig. 1 is a plan view of a printing chase constructed in accordance with the invention,

Fig. 2 is an enlarged longitudinal sectional view of one end of one of the crossbars,

Fig. 3 is an isometrical view of the end and side of the bar shown in Fig. 2,

Fig. 4 is a view, similar to Fig. 2, of the opposite end of the bar,

Figs. 5 and 6 are perspective views of the lock detents used at opposite ends of a crossbar,

Fig. 7 is a perspective view of one of the gear 7 bars, and

Fig. 8 is a perspective View of one of the keys used to operate the gear bar.

In the drawings, the numeral l0 designates a printing chase frame which is of the usual construction except for recesses l l in the inner side faces I2 and recesses l3 in the inner bottom face M of said frame. Each recess has a rightangular seat [5 at one end and a chamfer H5 at its opposite end. The recess may be referred to as a mortise or mortise recess of the dovetail type.

Coacting with the recesses are crossbar l1 and connecting bars I8 at right angles thereto. The crossbar has recesses I9 like the recesses [3, both of which recesses may be slightly shorter than the recesses I l. Referring to Fig. 1, the recesses l3 are in the bottom of the frame and it is desirable to have the chamfers [6 of the recesses II at the bottom thereof and the chamfers of the recesses l3 and I9 at the same ends thereof. It is to be understood that a plurality of both bars may be used.

The bar I! is notched out at the upper corner of each end to form right-angular shoulders 20 which engage the seats l5 when the ends of the bars are placed in the recesses I i. Detents 2| and 22 respectively, are pivoted in grooves 23 at each end of the bar, said grooves being rectangular in cross section and cut in the underside of said bar. The inner end 24 of each groove is substantially semi-cylindrical in shape and the inner end 25 of each detent is rounded to conform to the ends 24, but is spaced therefrom to permit a free vertical swing on a transverse pin 26, mounted in the side walls of the groove. The outer ends of the grooves are open and the detents, which are generally rectangular in cross section, terminate substantially flush with the end faces of the bar.

The difierence in construction of the detents 2| and 22, which will be hereinafter fully described, is for the purpose of using a common operator which when turned in the same direction at each end of the bar, will wedge the detents in 3 the recesses II and lock the bar I! in the frame. For this purpose a quoin key 21, as shown in Fig. 8, may be used.

Longitudinal channels 23 extend inwardly in the bar I! and each has a portion open to the underlying groove 23. In cross section each channel is partially circular with a flat bottom and a complementary gear bar 29 is mounted to slide freely in each channel. Near its outer end each gear bar has a depending boss 39 with its bottom 3! inclined. The detent 2|, which is at the right-hand end of the bar H (Fig. 1) has a wedge face 32, inclined upwardly. to its outer end; while the detent 22 has a wedge face 33 inclined downwardly to its outer end, both faces being on the tops of the detents. The bottoms 3| of the bosses 30 are inclined at the same angle as the faces 32 and 33, so that said bosses will ride on the faces and depress the detents, when the bars 29 are moved in the proper directions.

The detents, being pivoted in the grooves 23 near their inner ends, have a limited vertical swing. At the outer end of each detent a depending tenon or log 34, is formed. Each tenon has its outer face flush with the end of the detent and is formed with a chamfer 35, disposed at the same angle as the chamfers I6 of the recesses I i. The bars 253 are each provided with rounded gear teeth 36 on their undersides at their inner portions. A keyway 31 extends transversely through the crossbar ii, at each end portion thereof, adjacent the end 24 of the groove 23' for receiving the quoin key 21. The key has longitudinal gear teeth 38 disposed therearound to mesh with the teeth 33. By inserting the key in one of the keyways and rotating it, the gear bars 29 may be slid inwardly or outwardly.

In placing the crossbar ll in the chase frame It, the key 21 is employed to slide the bars 29 to the left, being rotated in the same direction for both detents. The compositor grasps the bar in both hands and with his fingers pulls the detents into the grooves 23 and places the ends of said bar in the recesses l i so that the shoulders ZG-engage the seats 15 at the upper ends of the recesses H. The tenons Stwill lie loosely in said recesses;

The compositor now inserts the key 21 in the keyway 31 at the right-hand end (Fig. 1) of the bar 51 and rotates it in a clockwise direction, whereby the gear bar 29 is slid outwardly and the boss 39 is caused to ride outwardly on the face 32 of the detent 2!. This wedging action causes the chamfer 35 of the tenon to tightly engage the chamfer lfi of the recess, whereby the right-hand end of the crossbar is locked in the chase frame. To lock the left-hand end (Fig. 1) of the bar in the frame, the compositor inserts the key 27 in the other keyway 3'! and by rotating it in a clockwise direction, the bar 29 is slid inwardly, and since the boss 39 rides up the face 33, the detent 22 will be depressed. Owing to the loose fits of the bar ends in the recesses ll, considerable lateral play of the crossbar is had. This not only makes for easy and ready placing and removal, but permits limited shifting or canting of the bar to compensate for irregularities, in chase frames due to misuse, age and the like.

The connecting bars 18 each have integral tenons or lugs 39 at their ends, conforming to the contours of the recesses l3 and 19, but engaging loosely therein. Adjacent the tenon at one end,- the upper end in Fig. 1, the connecting bar ha's' ari aperture 40 therethrough and a kerf or slot 4|, inclined outwardly therefrom to the edge of the bar and toward said tenon. This structure provides sufficient spring, whereby the tenon is resiliently connected to the bar. The connecting bars are placed in the frame before the crossbar is tightened, so that when said crossbar is tightened and shifted upwardly, the connecting bars will be tensioned and thus held tightly in place. t is pointed out these shifting and tensioning movements are only minute fractions of an inch, but they are suflicient to accomplish the desired result.

The detents 2! and 22 and the bars 29 may be referred to, generally, as locks and the bars 1'1 and I8, designated as locked in the frame; or the elements as, 30, 2! and 22, may be called locks for the tenons 343.

The pluralities of recesses provided permit the crossbar and the connecting bars to be variously positioned so as to enclose areas of different shapes and/or sizes within the chase frame. Thus, provision is made for accommodating printing forms of various sizes and shapes without necessitating extensive and hazardous blocking material.

The foregoing description of the invention is explanatory thereof and various changes in the size, shape and materials, as well as in the details of the illustrated construction may be made, within the scope of the appended claims, without departing from the spirit of the invention.

What I claim and desire to secure by Letters Patent is:

1. A printing chase including, a chase frame having recesses in its inner face, each recess having a right-angular seat at one end and a chamfer at its opposite end, a cross bar having shoulders at each end engaging the seats of the frame recesses, detents pivoted at the ends of the bar having tenons engaging the chamfers of the frame recesses, and movable elements in the bar engaging the detents and depressing them.

.2. A printing chase including, a rectangular chase frame having mortise recesses along its inner faces, each recess of the frame having a right angular seat at one end and a chamfer at its opposite end, a crossbar having its ends engaging in opposite recesses and also having at each end a right-angular shoulder engaging the right angular seat in each recess and the inner face of the frame, pivoted elongate detents having'inclined faces and mounted in the ends of the crossbar having chamfered tenons adapted to engage the chamfers of the recesses, and bars slidable in the ends of the crossbar and having means slidable on the inclined faces of the detents displacing said detents when slid to fasten the tenons in looking engagement with the chamfers of the recesses.

3. A printing chase as set forth in claim 2, wherein the detents are each pivoted transversely in the crossbar and are swingable laterally thereof, whereby the tenons may be swung into and out of'engagement with the chamfers of the recesses.

4. A printing chase as set forth in claim 2, wherein the bars are slidable longitudinally of the crossbar and each bar has a boss on its free end engaging the accompanying inclined faces of a detent to swing each detent when moved inwardly therealong.

5. A printing chase as set forth in claim 2, wherein the bars are slidable longitudinally in the ends of the crossbar and each bar has a boss on its free end engaging one of the inclined faces of the detents and gear teeth at its opposite end,

the crossbar having openings exposing.=,eome of the gear teeth for the reception of an operator for engaging said teeth and moving the bars longitudinally.

6. A printing chase as set forth in claim 2, wherein the inclined face of one detent is inclined downwardly from the outer end of said detent and the inclined face of the other detent is inclined upwardly from the outer end of said detent, each slidable bar having gear teeth exposed in the end portions of the crossbar, and a rotatable actuating member having teeth for successively engaging the gear teeth of the bars. the bars being moved in common inwardly or outwardly when the actuating member is successively engaged with the teeth thereof and retated in a common direction.

7. A printing chase as set forth in claim 2, wherein a connecting bar is provided in addition to the crossbar and the latter bar has intermediate its ends recesses each having a right angular seat at one end and a chamfer at its 010- posite end and located opposite one of the re cesses of the frame for receiving the ends of the connecting bar, detents having inclined faces and mounted in the ends of the connecting bar having chamfereol tenons engaging the chamfers of one of the crossbar recesses and the opposed frame recess, and slidable bars in the ends of the connecting bar having means engaging the inclined faces of the last named detents displacing said detents when slid to fasten the last named tenons in locking engagement with chamfers of the crossbar recess and the correlated frame recess.

8. A printing chase including, a rectangular chase frame having mortise recesses along its inner faces, each recess of the frame having a right angular seat at one end and a chamfer at its opposite end, a crossbar having shoulders at each end engaging the seats of the frame recesses, detents pivoted at their inner ends in the ends of the crossbar and having tenons on their outer ends adapted to engage the chamfers of the recesses, and elements movable longitudinally in the ends of the crossbar and along the detents having projections engaging the detents for swinging the latter, whereby the tenons may be engaged with the chamfers at the ends of the recesses.

9. A printing chase as set forth in claim 8, and aconnecting bar disposed at right angles to the crossbar within the frame and having looking elements at its ends engaging the crossbar and the frame.

CHESTER L. LANCE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 50,650 Yeomans Oct. 14, 1805 111,995 Warren Feb. 21, 1871 417,478 Ektrom Dec. 17, 1889 708,086 Slauson Sept. 2, 1902 1,093,023 Alta Apr. 14, 1914. 1,167,084 Leethem Jan. 4, 1916 1,489,965 Prentice Apr. 8, 1924 1,936,795 Lee Nov. 28, 1933 2,347,467 Diemer Apr. 25, 1944 FOREIGN PATENTS Number Country Date 330,770 Italy of 1935

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