US 741920 A
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No; 741,920. PATENTED 001. 20, 1903.
W. L. MARBLE. v
APPLICATION FILED JUNE 24, 1903.
WITNESSES: INVENTOR kw [777M m: NORRI; warms comnorouwo, wmunsnm, n c.
UNITED STATES Patented October 20,1903.
WEBSTER L. MARBLE, OF GLADSTONE, MICHIGAN, ASSIGNOR OF ONE-HALF TO F. H. VAN OLEVE, OF GLADSTONE, MICHIGAN.
srricrrrcnrron forming part of Letters Patent No. 741,920, dated October 20, 1903. Application filed June 24, 1903. Serial No. 162,924. (No model.)
To all whom it may concern.-
Be it known that I, WEBSTER L. MARBLE,
a citizen of the United States, residing at Gladstone, in the county of Delta and State of Michigan, have invented new and useful Improvements in Gun-Sights, of which the following is a specification.
This invention relates to an improvement in the rear sight for firearms of the general type shown in the patent to Lyman, No. 211,753; and it consists in the combination with the rotatable sleeve and longitudinallymovable sightshank of a screwthreaded look-nut for locking the sleeve and shank after the latter has been adjusted.
In the accompanying drawings, Figure 1 is a side elevation of a sight embodying my improvements. Fig. 2 is a longitudinal section of the same parallel with the axis of the gun. Fig. 3 is a longitudinal section on a line transverse to the gun. Fig. 4 is a cross-section on the line 4 4, Fig. 3.
The sight is attached to the gun-stock by means of the usual plate 1, which has ears 2 to receive the hinge-knuckle 3 on the tubular sight-post 4, which has a base 5 and a diametrical slot 6. At its upper end the post has a head 7. Between the base and this head is the adj usting-sleeve 8, screw-threaded internally to engage'with one or more projections on the sight-shank 9, such as the screw-threaded ribs 10. The shank has a sliding fit in the tubular post with the ribs receivedin the slots 6. By turning the'sleeve the shank can be raised and lowered in the post. sight proper, which is preferably a disk 11 with a small hole 12 in its center.
the base 5, is screw-threaded to receive a locknut 15, which engages with one end of the At its upper end the shank carries the The shank is graduated to enable it to be accurately adsleeve, being preferably counterbored to form a socket 16, into which the sleeve enters. Af-
ter the sight has been adjusted by turning the sleeve the locknut is rotated, forcing the sleeve endwise against a suitable shoulder on the post, and thus looking it securely against accidental turning. If this shoulder is formed on the head 7, as shown in the drawings, it
may be advantageously beveled and the end of the sleeve also beveled internally, so that when the sleeve is moved endwise it will compress the upper end of the post upon the shank, and thus clamp it firmly in place and augment the rigidity of the part, as shown in Fig. 2.
Having thus described my invention, what I claim is- I. In a gun-sight, the combination with a slotted tubular post having a shoulder at one en d, of a shank fitting therein, and provided, with one or p more projections extending through the slot in said tube, an internallyscrew-threaded sleeve freely rotatable on said 7 5 post and engaging with the projection on the shank, and a lock-nut working on the post and adapted to force the sleeve against the shoulder.
2. In a gun-sight, the combination with a slotted tubular post having a beveled shoulder at one end, of a sight-shank in said post provided with one or more projections extending through the slot in the tube, an int'ernally-screw-threaded sleeve freely rotatasleeve, and a lock-nut engaging with said base 5 and counterbored to receive the end of the sleeve.
In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.
WEBSTER L. MARBLE.
ELMER BEACH, WM. LANSING MARBLE.