US778255A

US778255A - Plate-clamp.

Info

Publication number: US778255A
Application number: US8967902A
Authority: US
Inventors: William J Main
Original assignee: Individual
Current assignee: Individual
Priority date: 1902-01-14
Filing date: 1902-01-14
Publication date: 1904-12-27
Anticipated expiration: 1921-12-27

Description

No. 778,255. PATPNTPD DPG. 2v, 190A. W. J. MAIN. PLATE CLAMP.

APPIIOATION FILED JAN. 14, 1902.

2 SHEETS-SHEET 1.

my I A mdf/1% J PATENTBD DEC. 27, 1904.

W. J. MAIN.

PLATE CLAMP.

APPLICATION FILED JAN. 14..1902.

2 SEEETS-SHEBT 2f .a l Haai-f'. "e

UNrTED STATES Patented December 27, 1904.

. PATENT OFFICE.

ROBERT HOE,

PLATE-CLAMP.

SPECIFICATION forming part of Letters Patent No. 778,255, dated December 27, 1904. Application filed January 14, 1902. kSerial Nc. 89,679.

To a/ZZ whom, it may concern:

Be it known that LWILLIAM J. MAIN, a citi'- zen of the United States, residing at New York, county of New York, and State of New York, have invented certain new and useful Improvements in Plate-Clamps, fully described and represented in the following specification and the accompanying drawings, forming a part of the same. y

This invention relates to certainl improvements in clamping devices, and more particularly to that class of clamping devices which are used for securing electrotype or stereotype plates to the beds on which they are'supported during the printing operation. l

The invention has for its object to produce a simple and cheap clamp which can be readily adjusted in position, the parts of which are not liable to become lost, and which is very effective in operation.

With this and other objects in view the invent-ion consists in certain constructions and in certain parts, improvements, and combinations, as will be hereinafter fully described and then specifically pointed out in the claims hereunto appended.

In the accompanying drawings, which form a part of this specification, andin which like characters of reference indicate the same parts,

Figure 1 is a planview of a plate-supportingl bed having a series of plates secured in position thereon by the improved clamp. Fig. 2 is a detail sectional elevation on an enlarged scale, the plane of section being indicated by the line 2 2 in-Fig. 1. Fig. 3 is a perspective view of the improved clamp removed from the plate. Fig. t is a detail section on the line 4 l of Fig. 2. Fig. 5 is a detail view on` an enlarged scale of one of the clamps in position. Fig. 6 is an end view of the clamp shown in Fig. 3'. Figs. 7, 8, and 9 are detail views illustrating the construction of a modified form of the clamp, and Figs. 10, 1,1, and l12f are detail views illustrating another form of the clamp. Referring to the drawings, 1 indicates a plate-supporting bed which is provided with recesses for the clamps to be hereinafter described. AThese recesses may be made in any desired form. Preferably, however, they will consist of grooves 2, arranged diagonally across the bed, as is usual. While the walls of these grooves might be vertical, if desired, they are preferably undercut, and preferably also the undercutportion will be curved, as indicated at. By constructing the recesses in the form-0f grooves, as shown, it is possible to adjust the clamps readily from one The clamp further includes a carrier for the locking member to be hereinafter described. This carrier may be variously constructed and may be integrally connected to the retaining-plate or vmay be separate therefrom and secured thereto in anydesired manner. As shown in Figs. l to 9, inclusive, the carrier consistsof an integral downwardlyprojecting stem 7, which is provided with a chamber 8 for the locking member. As shown in Figs. 10 to l2, inclusive, the carrier consists of a chambered block 9, which is independent ofthe retaining-plate and secured thereto.

' The locking member may be constructed in various ways and given various configurations. Preferably, However, it will be provided with a curved operating-face. In the construction shown inFigs. y1 to 5 the locking member consists of a ball 10, which is located in the chamber. In the construction shown in Figs. 7 8, and `9 the locking membe entirely contained within the chamber in the carrier. This construction enables the clamp to be withdrawn vertically from the grooves when necessary, thus obviating the necessity of sliding the clamps to the end of the grooves in order to remove them, as 1s the case with many of the clamps now in ordinary use.

Means are preferably provided for retaining the locking member in the chamber, so that it may not be lost or misplaced when the clamp is removed from the groove. VVlnle this may be eected in various ways in the construction shown, the mouths or openings of the chambers are preferably provided with shoulders 12. These shoulders may be formed in any desired mannerwas, for instance, by forming one of the mouths of openings in the chamber slightly smaller than the other and then upsetting the edges of the larger mouth after the locking member has been introduced.

Suitable means are provided for positioning the locking member so that it will engage a wall or walls of the groove. In the construction shown in Figs. 1 to 9, inclusive, this positioning device consists of a screw 13, which is tapped through the retainingplate and into the carrier, the screw being suflicientlyv long so that when it is forced home its lower end will come in contact with a side of the ball or cylinder. This screw, however, strikes the ball or cylinder on one side of its central line, and therefore tends to move it outward, thereby forcing the ball or cylinder into engagement with the wall of the groove. When the wall of the groove is undercut, as it will be in the preferred form of the construction, the pressure produced by the screw on one side of the locking member not only forces the member outward, but also produces a pressure which tends to drive the clamp forcibly down into the bottom of the recess and also over against the opposite wall of the same. The tightening of the screw therefore not only drives the clamp down into the bottom of the recess, but securely locks it in position therein.

While the` bottom of the chamber may be at right angles to the axis of the screw, if desired, it will be, preferably, slightly inclined, as sh'own, so that the locking member tends to roll down it. When the plate-clamp is placed in position in the recess or groove, the locking member will be so placed as to be properly acted upon by the screwgthat is to say, it will be so located that the screw will strike it at one side of its center.

In the modification shown in Figs. 10, 11, and 12 the carrier 9 is connected to the retaining-plate by means of ascrew 14, and the 11 in the chamber of the carrier, thus cansing these cylinders to move outward and engage the walls of the recess.

The construction illustrated in Figs ll), ll, and 12 forms the subject-matter ol divisional application, Serial No. 153,901, liled April :28, 1903.

While the constructions which are illustrated and have been described constitute preferred embodiments of the invention, it is to be understood that the invention may be embodied in constructions which dil'ler widely therefrom. The invention is not, therefore, to be limited to the specific constructions hereinbefore set forth.

That is claimed is- 1. The combination with a supporting-bed having a recess, of a retaining-plate, a locking member, a carrier for said member, and means independent of the carrier for positioning said member in locking engagement with a wall of the recess, substantially as described.

2. The combination with a supporting-bed having an undercut recess, of a retainingplate, a locking member, a carrier for said member, and means independent of the earrier for positioning` said member in locking engagement with a wall of the recess, substantially as described.

- 3. The combination with a supporting-bed having a recess, of a retaining-plate, a carrier connected to said plate, a locking member loosely mounted in the carrier, and means for positioning said member in locking engagement with a wall of the recess, substantially as described.

4. The combination with a supporting-bed having an undercut recess, of a retainingplate, a carrier connected to said plate, a locking member loosely mounted in the carrier, and means for positioning said member in locking engagement with a wall of the recess, substantially as described.

5. rlhe combination with a supporting-bed having a recess, of a retaining-plate, a car-- rier, a locking member having a curved operating-surface loosely mounted in theicarrier, and means for positioning said member in locking engagement with a wall of the recess, substantially as described.

6. The combination with a supporting-bed having an undercut recess, of a retainingplate, a carrier, a locking member having a curved operating-surface loosely mounted in the carrier, and means for positioning said member in locking engagement with a wall of the recess, substantially as described.

7. The combination with a su pporting-bed having an undercut curved recess, ol" a retaining-plate, a carrier, a locking member having a curved operating-surface loosely mountied in the carrier, and means for positioning said member in locking engagement with a wall of the recess, substantially as described.

8. The combination with a supporting-bed lOO `having an undercut curved recess, of a rehaving a recess, of a retaining-plate, a chambered carrier, a locking member loosely mounted in the carrier, and means for positioning said member in locking engagement With a Wall of the recess, substantially as described.

9. The combination with a supporting-bed having an undercut recess, of a retainingplate, a chambered carrier, a locking member loosely mounted in the carrier, and means for positioning said member in locking engagement With a Wall of the recess, substantially as described.

curved operating-surface loosely mounted in the carrier, and means for positioning said member in locking engagement with a Wall of the recess, substantially as described v 12. The combination With a supporting-bed having an undercut recess, of va retainingplate, a chambered carrier, a locking member having a curved operating'- surfacey loosely mounted inthe carrier, and means for positioning said member in locking engagement with a Wall of the scribed. f

13. The combination With a supporting-bed recess, substantially as detaining-plate, a chambered carrier, a locking member having a curved operating-surface loosely mounted in the carrier, and means forv positioning said memberV in locking engagement With a Wall of the recess, substantially as described.

14. The combination with a supporting-bed 'having an undercut recess', of a retainingplate, a chambered carrier having an inclined bottom, a locking member having a curved operating-surface loosely mounted in the chamber, and means forpositioning said member in locking engagement with a Wall of the recess, substantially as described.

15. The combination with` a supporting-bed .having an undercutcurved recess, of a retaining-plate, a chambered carrier having an inclinedbottom, a locking member having aycurved operating-surface loosely mounted in the chamber, and means for positioning said member iny locking engagement with a Wall of thze'recess, substantially as described.

16. The combination With a supporting-bed having a recess, of a retaining-plate, a chambered carrier havingl an -inclined bottom, a locking member having a curved operatingsurface loosely mounted in the chamber,1neans for retaining the member in the chamber, and means for positioning said member in locking engagement with a Wall of the recess, substantially as described.

17. The combination with a supporting-bed having an undercut curved recess, of a retaining-plate, a chambered carrier having an inclined bottom, a locking member having a curved operating-surface loosely mounted in the chamber, means for retaining the member in the chamber, and means for positioning said member in locking engagement With a Wall of the recess, substantially as described.

18. A plate-clamp comprising a retainingplate, a chambered carrier, a locking member loosely mounted in the carrier, and a positioning device, substantially as described.

19. A plate-clamp comprising a retainingplate, achambered carrier, a locking member having a curved operating surface loosely mounted in the carrier, and a positioning device, substantially as described.

20. .A plate-clamp comprising a retainingplate, a chambered carrier, a locking member having a curved operating-surface loosely mounted in the carrier, and a positioningscrew, substantially as described. f

21.' A plate-clamp comprising a retainingplate, a chambered carrier, a locking member having a curved operating-surface loosely mounted in the carrier, means yfor retaining the locking member in the chamber, and a positioning device, substantially as described.

22. A plate-clamp comprising a retainingplate, a chambered carrier, a locking member having a curved operating-surface loosely mounted in the carrier, means for retaining the locking member 'in the chamber, and a positioning-screw, substantially as described.

23. A plate-clamp comprising a retainingplate, a chambered carrier, a-spherical locking member loosely mounted in the chamber, and a positioning device for said member, substantially-as described. v n

24. A plate-clamp comprising a retaining- TOO plate, a chambered carrier, a spherical loclra side Wall of the receiving-slot and a screw i having a tapering end adapted to contact With said part and force the same outward as the screw is turned.

26. In a printing-plate holder, the combination Witha bed or base plate provided with 4grooves running slantingly with reference to the sides of the base-plate; of a printers block adapted to hold and laterally adjust a printing-plate; said block being provided with means adapted to secure the block in one of said grooves, said means comprising a plug adapted to project laterally Jfrom the side of the'said block, and means forforcing said plug outward and thereby looking said bleek means on said screw cooperating with smid 10 in said groove. laterally-movable member.

27. A plate-holder of the Character deln testimony whereof l have hereunto set scribed, comprising a base or bleek provided my hand in the presence of two subscribing 5 With slots, and plate-holding clamps arranged Witnesses.

on said block, said clamps consisting of a 'ILLIAM J. MAIN. plate, a screw in operative connection with Witnesses: the plate, a laterally-movable clamping mem- F. WV. H. @nimm ber cooperating with a Wall of said slot, and XV. F. MORGAN.