US1721361A - Glass cutter - Google Patents

Description

I l.72l,36l I A. VOLLM GLASS CUTTER July 16, 1929.

Filed March 12, 1928 Patented July 16, 1929.

UNETED I; TATE "GLASS CUTTER.

Application filed March 12, 1828. Serial No. 261,118.

The invention relates to improvements in glass cutters of the type provided with a cutting wheel at the lower end of a shank. it

is now customary, when the wheel is badly worn, to discard the entire cutter, but it IS the aim of my invention to provide an unproved construction in which the wheel'is demountably carried by the lower end of the s iank, may be readily removed, and replaced with a new wheel, thus permitting the shank and the wheel-retaining means of one cutter to last indefinitely, with only the necessity of renewing the cutting wheel from t me to time, with an expense which is negligible.

lVith the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, description be- I ing accomplished by reference to the accompanying drawing. Fig. 1 is a side elevation and Fig. 2 a front elevation of a glass cutter embodying my improvements.

Fig. 3 is an enlarged vertical sectional view on line 33 of Fig. 2.

Fig. a is an enlarged lower end view.

Fig. 5 is a transverse section on line 5-5 of Fig. 3.

Figs. 6 and 7 are perspective views of the block which is instrumental in holding the cutting wheel detachably in place.

Fig. 8 is a perspective view of a stamped metal block or plate which may if desired be used in place of that shown in Figs. 6 and 7.

The shank 8 of the cutter herein disclosed, is of the construction shown in my pending U. S. application Serial We. 235,722, filed November 25, 1927, with the exception of the improved construction at the. lower end of said shank, and I wish to explain that this improved construction is usable with a shank of any form and not necessarily with the particular shank shown.

The lower end 9 of the shank 8 is inclined somewhat more steeply than usual and is provided in its front corner with a receiving groove or notch 10 for a cutting wheel 11. Leading rearwardly from this groove,

the shank end 9 is also provided with an additional groove 12 for a purpose to appear, and a screw-receiving socket 18 is formed in the shank, registering with said groove 12. At opposite sides of the groove or notch 10, the lower end 9 of the shank 8 is formed with recesses 14 to receive the shaft or pin 15 of the wheel 11, or possibly integral trunnions on saidwheel, and it is to be understood that the term shaft used in claiming the invention is to be considered as comprehending either of these constructions, as they are mechanically equivalent.

A clamping block 16 of forwardly tapered form, contacts with the lower end 9 of the shank 8 and is. providedat its front .end with a wheel-receiving slot 17 which registers with the groove or notch 10. The rear portion of this block is formed with a countersunk opening 18, a screw 19 passes through this opening and is threaded into the socket 13, and ribs 20 are formed on the block 16 for reception in thegroove 12, hold ing the block against turning about the screw. While it will be understood that both the block and the shank could be recessed to jointly receive the shaft 15, the block is, in the present showing, free from such recessing and merely holds the shaft tightly in the recesses 14. Moreover, While the block is shown contacting only at its rear end with the lower end 9 of the shank 8, it is obvious that it might contact throughout a greater part of or in fact its whole length. By the construction shown however, tightening of the screw 19 swings the front end of the block 16 toward the lower end of the shank 8 and hence produces probably a more effective clamping means for the shaft 15 than if some other arrangement were employed.

Fig. 8 discloses a stamped metal block or plate which may be used in place of the block 16. This block or plate 16 is formed with a slot 17 at its front end with a screwreceiving opening 18, and at its rear end with an upwardly stamped lug 20. The wheel 11 is receivable in the slot 17, the screw 19 is receivable in the opening18, and the lug'20 is adapted for reception in the rear portion of the groove 12.

The construction shown and described is simple and inexpensive, may be easily and advantageously manufactured and sold at small cost, and permits quick and easy interchange of cutters. By merely loosening the screw 19 sufliciently to permit the shaft 15 to pass out of the recesses 1a, the wheel 11 may be detached when badly worn; Then another wheel may be insertedwith equal ease and will be held in proper position upon tightening of the screw.

I claim 1. In a glass cutter, a shank having a lower edge at an acute angle to its front edge, said shank being, formed with a wheelreceiving groove which opens through both of said edges, a clamping block contacting with said lower edge of said shank and having a wheelreceiving slot registering with said groove, a cutter Wheel in said groove and slot having a shaft disposed between said lower edge of the shank and said block,

at least one of these members being recessed to receive said shaft, and a screw passing through said block and threaded into said shank for detachably securing the former to the latter.

2. In a glass cutter, a shank having a lower edge at an acute angle to its front with said lower edge of said shank and having a wheel-receiving slot registering with said groove, a cutter wheel in said groove and slot having a shaft disposed between said lower edges of the shank and said block, at least one of these members being recessed to receive said shaft, and a screw passing through said block and threaded into the lower end of said shank to detachably secure the block to the shank, said block having a longitudinal rib received in said groove preventing turning of the block about the screw.

In testimony whereof I have hereunto at fixed my signature.

ADOLF VOLLM.

Images