US507963A

US507963A - Back gage for paper-cutting machines

Info

Publication number: US507963A
Authority: US
Publication date: 1893-10-31
Anticipated expiration: 1910-10-31

Description

(No Model.)

A. S. B-OGART & J. J; NESMITH. BACK GAGEI'OR PAPER CUTTING MACHINES.

No. 507,963. Patented Oct. 31, 1893.

mezafom efozz Q/ v UNIT D STATES PATENT OFFICE.

ARTHUR'S. BOGART AND JOHN J. NESMITH, OF WARREN, PENNSYLVANIA.

BACK GAGEFOR PAPER-CUTTING MACHINES SPECIFICATION forming part of Letters Patent No. 507,963, dated October 31, 1893. Application filed December 27. 1892. $erial Nb. 456,440. (no model.)

To all whom it may concern:

Be it known that we, ARTHUR S. BoeARr and JOHN J NESMITH, citizens of the United States, residing at Warren, in the county of Warren and State of Pennsylvania, have invented new and useful Improvements in Back Gages of Paper-Cutting Machines, of which the following is a specification.

This invention relates to improvements in gage adjusting mechanism for paper cutting machines and consists in the novel features of construction and combination of devices, as hereinafter described and claimed, for permitting a quick adjustment of the gage where by it can be moved at once to any desired position independent of the usual slow operation of the ordinary screw shaft.

In the annexed drawings Figure 1 is aside I elevation of so much of a paper cutting n1a chine as is required to illustrate our invention. Fig. 2 is an inverted plan of the same. Fig. 3 is a vertical transverse section of the machine in front of the gage.

Referring to the drawings the numeral 1 designates the supports of the table 2 on which the paper is to be placed. The back gage 3 is attached to a suitable slide 4 thatis longitudinally movable in a slot or opening formed in the table. To the under side of this gage slide 4 is secured a depending block 5 having a perforation of sufficient size to enable the block to loosely surround a screw shaft 6 that is also suitably supported at one end of the machine frame. On the opposite sides of the screw shaft 6 and having their.

upper ends pivoted respectively to the front and rear of the block 5 are arranged two depending blades7 and 8 that have their lower ends connected by springs 9 to pins or lugs 10 on the lower end of said block. By the action of these springs 9 the blades 7 and 8 are drawn toward each other and into engagement with the opposite sides of the screw shaft. When thus engaged'with the screw shaft the blades 7 and 8 serve as the threads of a nut so that if the screw-shaft is now turned in either direction, by means of a crank handle 11 on its outer end, the gage 3 will be moved slowly forward or back, as the case may be, until the required adjustment is obtained. To the lower end of the block 5 are pivoted two horizontally arranged angle levers 12 and 13. The lever 12 has one arm in contact with the inner edge of the blade7 and its other arm in contact with the outer edge of the blade 8 while the lever 13 has one arm in contact with the inner edge of the blade 8 and to its other arm is attached a cord 14 that is passed partly around a pulley 15 and then through a guide opening at the other end of the machine. To the end of the cord 14 a handle 16 may be attached. By grasping this handle and drawing on the cord 14 the angle lever 13 will force the blade 8 outward or away from the screw shaft and" at the same time cause the blade 8 to actuate the lever 12 so as to likewise force the blade 7 from its engagement with the screw shaft. While the blades 7 and 8 are thus held from engagement with the screw shaft the gage 3 and attached slide and block can be rapidly moved any. distance to the required position with relation to the table and the cutting mechanism without incurring the delay of the usual slow adjustment by means of the screw shaft. If desired a vertical shaft 17 may be passed through the slide 4 and block 5 and be provided at its upper end with edge of the blade 7 and thus disengage it the blade 8 is disengaged. The blades 7 and 8 may thus be disengaged from the screw shaft either by the action of the levers 12 and 13 operated through the cord 14 or by the action of the lever 12 and arm 19 when operated by the crank 18 on the shaft that carries said arm. After the quick adjustment of the gage has been made and the cord 14, or crank 18, released, the springs 9 will draw the blades 7 and 8 again into engagement with the screw shaft so that any further or from the screw shaft at the same time that exact adjustment of the gage can be made gradually by turning the screw shaft in a proper direction. It will be observed that when the cord 14 is pulled to disengage the blades 7 and 8 from the screw shaft it will also at the same time drawthe gage back by reason of one end of the cord being attached to the lever 13 which through the block 5 is connected with the gage slide. The cord 14 possesses the additional advantage of not being in the way as the projecting end of a rod would be. When the vertical shaft 17 is rotated for the purpose of causing its arm 19 to disengage a the blades 7 and, 8 from the screw shaft 6 the gage can be quickly moved either forward or back, as required.

What we claim as our invention is 1. The combination withthe screw shaft and the slide having attached thereto a perforated block that loosely surrounds said screw shaft, of the pivoted blades attached to said block on opposite sides of the screw shaft,- springs attached to said blades and adapted to hold them in engagement with the screw shaft, a lever for actuating one of said blades to disengage it from the screw shaft and a lever for transmitting motion from one blade to' the other whereby both are disem gaged from the screw shaft at once against the action of their springs, substantially as described.

2. The combination with the screw shaft 6 and the" slide ethaving attached thereto aper forated block 5 that loosely surrounds said screw shaft, of the pivoted blades 7 and 8 provided with springs 99, the lever 12 having .one arm engaged with the inner edge of the blade 7 and its other arm engaged with the outeredge of the blade 8 and means for actuating the blade 8 to disengage both blades from the screw shaft, substantially as described.

3. The combination with the screw shaft 6 and the slide 4 having attached thereto a perforated block 5 that loosely surrounds said