US959311A - Circular-glass cutter. - Google Patents

Description

W. CHASE, JR. CIRCULAR GLASS CUTTER.

APPLICATION FILED JULY 1, 1909.

9,3 1 l a Patented. May 24, 1910.

ATTORNE Y8 WILLIAM CHASE, JIL, OF INDIANA PQLIS, INDIANA.

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Application filed July 1, 1909. Serial No. 505,349.

To all whom it may concern:

Be it known that I, WILLIAM CHAsE, J r., a citizenof the United States, and a resident of Indianapolis, in the county of Marion and State of Indiana, have invented a new and Improved Circular-Glass Cutter, of which the following is a full, clear, and exact description.

Among the principal objects which this invention has in view are to rovide an implement which may be central y located upon the surface of glass and there immovably held, and to rovide a swin 'ng arm pivotally mounted upon a fixe structure and hingedly secured thereto. 7

Reference is to be had to the accompanying drawings formin a part of this specification, in which simi ar characters of refer-' ence indicate corresponding parts in all the views.

Figure 1 is a perspective view of a glass cutter constructed in accordance with the present invention; Fig. 2 is a vertical section of the same, showing the extension rod in full lines; and Fig. 3 is a cross-section taken on the line 3-3 in Fig. 2.

The extension rod 4 is partly circular in cross-section and is provided with a fiattened upper surface 5 which forms a guide for the head 6. On the rounded surface of the rod 4 are provided scale markings 7 byscrew-threaded nut 11. The head 6 is per-- forated, as shown at Fig. 3 of the drawings, to snugly fit the extension rod 4. Itis upon the flattened or square surface 5 of the extension rod 4 that the rubber washer 12 is seated when the nut 11 is screwed up on the extension 10. i

The washer 12 being constructed of a suitable material, the head 6 is held in the position to which it is adjusted before the nut 11 is tightened. This adjustment is aided by means of the scale 7. This scale is constructed with reference to the center of the pivot on which the rod 4 swings, that is, the first marking of the scale from the pivot is the marking to represent the number of inches or fractions thereof at which the said marking is removed from'the pivot.

The pivot consists of a tubular extension set up from a circular plate 13. The tubular extension is provided with a converged end 14, between whichand the body of the extension there. is formed a groove 15 provided to receive'the ring 16, surrounding an opening in the rubber bulb 17. The tubular extension is further provided with a central openin 18 communicating from the inside of the ulb 17 and with a chamber formed under the plate 13 by the flange 19 and the rubber gasket 20. The flange 19 is of slightly less diameter than the plate 13, formin thereby a rabbeted edge to receive the gas et 20. The gasket 20 is constructed of suit-able rubber, that most preferred being soft in texture, and is adapted to conform to the surface of the glass and to form an air-tight joint therewith.

The tubular extension is ooved at 21 to receive a pin 22 which is driven tangentially across .the opening in a collar 23 to form a. lock pin to hold the said collar in rotary position upon the said extension. The pin 22 is elongated to extend beyond the collar 23 to form the'hinge pivots for the hinge end 24. The collar 23 is flattened on the twoopposite sides, as at 25, to accommodate the hinged extensions 26 of the bin e end 24 and thereby provide ides for t e hinge swing of the hinged en 24and the extension rod 4 to which it is secured by the threaded extension 27 of the -said rod 4. At the rear end of the said loop the surface 28 is extended to pivot 22 of the bin ed end .24 and the rod 4 connectedtherewit Specification of Letters intent. v Patented May 1910. I

Having an implement constructed as is as follows: Having located the center from which the cutting is desired, the plate 13 is placed in position concentrically therewith. The. bulb 17 is compressed to eject the air therefrom when the gasket 20 by means of the plate 13 is pressed firmly against the glass while the bulb 17 is released. The bulb 17 is constructed of strong resilient walls adapted to resume their spherical shape, rare ing the air contained within the said bu b and the chamber formed below the plate 13, forming a strong and persistent suction. This suction secures the ivot extension firmly in position. The head 6 is now adjusted to the desired cut, and when so adjusted the screw 11 is tightened to set thewasher 12 hard down on the fiat extension 5 of the rod 4; 'The head 6, carrying the cutter 9, is now in position for operation. This is accomplished by lowering the cutter upon the surface ofthe glass and bearing upon the rod suificiently to embed the cutting (point in the glass as the rod is swept aroun the pivot center of the extension on the plate 13. When the circular cut is formed as desired, the instrument is released from its hold on the glass by compressing the bulb 17, which relieves the rarefaction in the chamber under the plate 13 and releases the same and overcomes the air suction produced by the abovedescribed operation.

Having thus described my inventionfI claim as new and desire to secure by Letters Patent:

1. A circular lass cutter comprising a fixed metal plate aving a depending yielding continuous flange and a vertical exten sion adapted to form a pivot for a swin ing arm, said extension being perforated, to orm communication with the under side of the said plate, means for extracting the air from under said plate to cause a partial vacuum thereunder, and an extension arm pivotally connected with said vertical extension and carrying a cutting instrument adapted to cut glass.

2. A circular glass cutter comprising a metal plate havin a continuous yielding depending flange a apted to form a chamber under said plate in conjunction with the glass to be out, said plate having a vertical extension provided with a tubular perforation 0 ening outward from said chamber formed by said flange, a collar surrounding said vertical extension, an extension rod hingedly connected to said collar, a cuttin devlce slidably mounted upon said rod, an means for rarefying the air below said plate to form a suction to seat the said yielding flange upon the said glass.

3. A circular glass cutter comprising a late having a continuous yieldingde endlng flange adapted to form a chamber elow the said plate in conjunction with the glass to be cut, said plate having a tubular extension provided with a perforation leading outward from said chamber, a collar pivotally mounted upon said vertical extension, a rod hingedly connected with said collar, a cutting instrument slidably mounted upon said rod, and a resilient compressible bulb adapted to fit over the said vertical extension to be compressed to displace the air in said chamber, and expanded to rarefy the remaining air in said chamber.

4. A clrcular glass cutter com rising a plate having a rubber gasket epending' rom said plate to form a chamber below the same, said plate having a tubular extension forming an air passage outward from said chamber, a collar pivotally mounted upon said extension, an extension rod hingedl connected to said collar and provided with scale markings, a cutting instrument slidably mounted upon said rod, means for holding the said cutting instrument fixedly in position on said rod, and a compressible rubber bulb adapted to extend over said extension and adapted by a compression and expansion thereof to form a rarefication of the same in said chamber under said plate.

5. A circular glass cutter comprising a plate having a continuous rubber gasket depending therefrom to form a chamber beneath the said plate in conjunction with the glass to be cut, a vertical tube mounted upon said plate and forming open communication with the chamber below the same, said tube having a groove at the u per end to receive and hold a compression bulb, a collar pivotally mounted upon said tube, an extension rod hingedly connected to said collar, a cuttin implement adapted to slide longitudinal y on said rod, means for maintaining said cutting implement in a vertical position, and a collapsible rubber bulb adapted to extract the air from the chamber formed under the said plate and within the said rubber gasket.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM CHASE, JR. Witnesses:

CHARLES M. DEEM, JOHN A. MOORE.

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