US775958A

US775958A - Sight for firearms.

Info

Publication number: US775958A
Application number: US19930504A
Authority: US
Inventors: James Windridge
Original assignee: LYMAN GUN SIGHT CORP
Current assignee: LYMAN GUN SIGHT CORP
Priority date: 1904-03-21
Filing date: 1904-03-21
Publication date: 1904-11-29
Anticipated expiration: 1921-11-29

Description

PATEN'TED NOV. 29, 1.904.

J1 WINDRIDGE.

SIGHT FR FIREARMS.

APPLIOATION FILED MAR. 21, 1904.

N0 MODEL,

INI/ENTOR UNITED STATES Patented November 29, 1904.

PATENT OFFICE.

JAMES WINDRIDGE, OF MIDDLEFIELD, CONNECTICUT, ASSIGNOR TO THE LYMAN GUN SIGHT CORPORATION, OF MIDDLEFIELD, CONNECTICUT, A CORPORATION OF CONNECTICUT.

FIREARNIS.

SPECIFICATION forming part of Letters Patent No. '77 5,958, dated November 29, 1904.

Application led March 21, 1904.

T all whom it may concern.-

Beit known that I, J AMES WINDRIDGE, a citizen of the United States, and a resident of Middlefield, in the county of Middlesex and State of Connecticut, have invented certain new and useful Improvements in Sights for Firearms, of which the following is a full, clear, and exact specification.

My invention relates to sights for firearms; IO and it has for its object to provide improved spring-detent mechanism for folding sights or that class in which the sight is hinged to the base andyieldingly held in sighting position by means of a spring-actuated holding tooth or detent. i

The particular form of sight to which my improvements are adapted comprise a base having a pair of upright ears and a folding part provided with a tongue or joint fitted 2O between said ears and having trunnions journaled therein, the trunnions consisting of a detachable pivotal part or hinge bolt fitted through the tongue and held by a nut `which forms one of the trunnions. Springs of U shape, having their limbs arranged longitudinally of the pivotal part and adapted` to engage a notchin the ear of the base, have been largely employed in this class of sights; but such devices are expensive and cumbersome 3o and entail a more limited range of elevation of the sight-post, which in such case cannot encroach upon the horizontal plane of the bolt in its vertical adjustment.

My improvements contemplate extending 3 5 the range of adjustment of the sightpost down through the plane of the bolt and placing the spring mechanism within the plane of the hinge-ear of the base.

To this end the invention consists in the 40 novel transversely-slotted and perforated bolt and in the novel combination, with the pivotal part or bolt, of a spring and detent arranged. within the trunnion thereof and in the construction of parts, as hereinafter more fully described and claimed.

In the accompanying drawings, forming a part of this specification, Figure l is a side elevation ofmy improved sight with the fold- Serial No. 199,305. (No model.)

ing part in the position assumed in sighting. Fig. 2 is a central vertical lengthwise section 50 on the line w, Fig. 5, the sight in this and succeeding figures showing a shorter design of adjusting-sleeve and sight-post than those of Fig. l. Fig. 3 is a side elevation, partly in section, through the central cross-plane of the hinge-bolt head on the line c Fig. 4. Fig. 4 is a central vertical transverse section on the line a' a', Figs. 2 and 3. Fig. 5 is a front elevation.y Fig. 6 is a horizontal section on the line y y, Figs. 3 and 4. Fig; 7 is 60 a similar section on the line .a c, Figs. 3 and 4, but having the spring removed. Fig. 8 is an enlarged vertical section through the hingebolt detached, similar to the section of the same in Fig. 4. Fig. 9 is an enlarged cen- 65 tral horizontal section of the hinge-bolt similar to the section of the same in Fig. 7, but showing the spring. Fig. l() is an end view of the clamping-nut of the hinge-bolt.

Referring' to the drawings, A designates 70 the base of the sight adapted for being mounted on the firearm rearwardly of the barrel and secured `by screws through the screw-seat a. It is provided with the vertical transversely-perforated hinge bearings or vears a2, between which the hinge-eye of the joint B is tted with its perforation concentric with those of the bearings,but of somewhat smaller diameter. Through these parts is passed a bolt fitting the hinge-eye 7J and having a cy- 80 lindrical head CZ journaled in one ofthe hingebearings. and a screw-threaded portion d2, whereon is screwed a cylindrical nut d3, journaled in the other hinge-bearing. The nut projects slightly outside of the bearing, and such projecting portion is milled away to provide the parallel-sided part d* for the application of a wrench to screw the nut to place. When the nut is tightly screwed against the hinge-eye thus correspondingly clamping` the head d against the opposite surface of the hinge-eye, the bolt-head and nut are rigidly held with reference to the joint and comprise trunnions on which the latter is swung in the hinge-bearings of the base, enabling the sight to be folded down rearwardly from IIA I I the vertical or sighting position (shown in Fig. l) fiat upon the base and out of the way when not in use. The upper part of the joint comprises a vertical cylindrical shell E, havinga rectangular spline e milled throughout its length and extending down to the perforation of the hinge-eye. An annular seat e2 is milled in the joint around the base of this shell to receive the lower end of a sleeve F, having a slight head or shoulder @3, over which the metal of the joint is swaged to hold the sleeve in place vertically, but not'so tightly as to prevent the free rotation of the sleeve in the seat thus formed. Said sleeve is screw-threaded internally, and the threads e* of the screw are engaged with the teeth @5 of a rack formed on one side of a sight-post G, fitted in the spline c', as shown in Fig. 6, the teeth of the rack being projected exterior to the circumference of the shellE, as shown in said figure, comprising' a portion of the thread of a screw, of which the toothed side of the sight-post is a segment. The upper end of the sight-post is provided with the circular peep-sight oriice g, which may be adjusted at different heights by turning the sleeve F, and thereby elevating or depressing' the sight-post G and its rack.

These parts are old and well known and here require no further description, the novel features of my improvement being as follows:

Diametrically through the bolt-head is a chamber H, formed by first drilling through the head and then reaming out the hole on one side at a slight angle therewith nearly through the head, but leaving' a small shoulder /L at the periphery thereof at the end of the reamed portion, as shown in Fig. 3. On that side of the bolt-head opposite to said reamed space another hole h2 is drilled from the periphery of the head inward to the diametral chamber at a right angle therewith. The bolt is preferably arranged in its bearing with the diametral chamber H nearly in a horizontal plane and the hole 7b2 vertical in the lower half of the head, the shoulder it in that case being on the upper side of the head. In the hole is tted a cylindrical plunger c', having a spur fel at its lower end adapted to fit a corresponding notch 'i2 in the base and its upper end grooved to receive the lower limb i* of alooped or U-shaped spring 3, arranged in the 'diametral chamber with the end portion of its upperlimb 5 bearing on the upper side of the chamber, as shown in Fig. 3. rIhe lower limb of the spring is shorter than the upper limb, as it does not require to project beyond the surface of the plunger whereon it rests. The upper limb is bent downward in its central part to provide clearance-space in which to spring upward, and its end is engaged by the shoulder 7L to retain the spring in place against the tendj ency to slide upwardly on the inclined upper i surface of the chamber.

In operation the pressure of the spring 3' downwardly on the plunger retains the spur v1 of the plunger engaged in the notch il in the base, and thus holds the head cl' of the bolt stationary in its bearing. -The bolt-head is clamped to the hinge-eye of the joint in position to4 bring the sight-post G in the vertical or sighting' position (shown in Fig. l) when the plunger `is engaged with the notch 2 of the base, as shown in Figs. 3 and 4. From this position the joint, with the sight-post and its parts, may be folded down rearwardly by moderate pressure applied on the joint in that direction, the engaging shoulder, formed by the spur of the plunger and the notchof the base, being slightly rounded or beveled to permit this action.

With this construction of spring contained wholly within the head of the bolt thev part of the bolt tting the hinge-eye of the joint can be cut away to permit the passage through it of the sight-post, whereby a greater range of adjustment of the sight can be obtained. To attain this.I the bolt is preferably milled out to provide a central vertical groove R, as shown in Figs. 2 and 4 and in the enlarged views shown in Figs. 8 and 9. Said groove is of the width of the sight-post, leaving' entire the cylindrical sections M M of the bolt tied together by the segmental section N, extending between the sight-post and the circular front wall of the hing'e-eye of the joint. Thus constructed the sight-post Gr may be brought down with its end nearly in contact with the lower side of the eye of the joint, as shown in Fig. 2, which provides a very neat and compact design of sight.

A common form of this sight is provided with a cylindrical sight-post instead of rectangular sided and having' a rack on one side projecting from its cylindrical surface; but such construction requires no change in my improvements.

I claim and desire to secure by Letters Patentl. In folding sights for firearms the combination of a base provided with hing'e ears or bearings, a folding part or joint fitted between the bearings of the base and provided with cylindrical trunnions journaled in the bearings, a`folded spring received in a diametral cavity in one of the trunnions, and a plung'er guided in a socket in said trunnions and sustaining the thrust of the spring, the bearing of the base being provided with a notch for engaging said plunger to hold the joint in sighting position, substantially in the manner and for the purpose specified.

2. In folding sights for firearms the combination of a base provided with hinge ears or bearings, a folding part or joint fitted between the bearings of the base and provided with cylindrical trunnions journaled in the bearings, a substantially radially operating plunger or detent guided in one of the cylindrical trunnions and a spring received in a cavity IOO IIO

within the trunnion and actuating the plunger, the bearing of the base being provided with a notch for engaging the plunger to hold the joint in sighting position, substantially in the manner and for the purpose specified.

3. 1n folding sights for firearms the combination of a base provided with hinge ears or bearings, a folding part or'joint provided with 'a hinge-eye fitted between the bearings, a bolt fitted through the hinge-eye of the joint having a cylindrical head journaled in one of the 'hinge-bearings of the. base and a cylindrical nut clamping the joint rigidly between the same and the bolt-head and .journaled in the other hinge ear or bearing, a folded spring received in a diametral cavity in one of the cylindrical journals, and a plunger actuated by the spring to engage a notch in the base to hold the joint in sighting position, substantialy in the manner and for the purpose specifie 4. In folding sights for firearms the combination of a base provided with hinge ears or bearings, a folding part or joint provided with a hinge-eye fitted between the bearings', a bolt fitted through the hinge-eye of the joint provided with a cylindrical head journaled in one of the hinge-bearings of the base and having a diametral perforation and a socket opening from the periphery into the diametral perforation, a cylindrical nut journaled in the other hinge-bearing of the base and screwed upon the bolt to clamp the same rigidly to the hingeeye, a looped or U spring received in the diametral Vperforation of the bolt-head and a plunger or detent guided in the socket and engaged and actuated by the spring, the hingebearing being provided with a notch for engaging the detent to hold the joint in sighting position, substantially in the manner and for the purpose specified.

5. 1n a folding sight for firearms the combination of a base provided with hinge ears or bearings, a folding part or joint provided with a hinge-eye fitted between the bearings,a sightpost vertically movable and adjustable in the joint, a bolt fitted through the hinge-eye of the joint with the part` fitting the eye cut away to receive and permit the passage of the sight-V post, and having a cylindrical head journaled in one of the bearings of the base, a cylindrical nut screwed upon the bolt to clamp the same rigidly to the joint, and journaled in the other bearing of' the base, a plunger or detent carried in the bolt-head, and a spring carried in the bolt-head to actuate the detent, the base being provided with a notch for engaging the detent to hold the joint in sighting position, substantially in the manner and for the purpose specified.

6. In a folding sight for firearms the combination of the base havingvthe hinge-ears ct one of which is provided with the detent-engaging notch 2, the joint B hingedv between said ears, the bolt fitted through the joint and having the groove M inthe part fitting the joint, yand provided with the journal-head d fitting one of the hinge-ears and having the diametral chamber H and the socket 7a2, the journal-nut Z3 clamping the bolt to the joint and fitting the other hinge-ear, the spring 3 received in said diametral chamber, the detent t' guided in said socket and adapted to engage the notch of the hinge-ears'to hold the joint in sighting position, a sight-post guided in the joint and received through the groove of the body of the bolt and provided with a rack, and an adjusting-nut journaled in the joint and engaging the rack of the sight-post to depress or elevate the post, substantially in the manner and for the purpose specified.

Signed by me at Middlefield, Connecticut, this 17th day of March, 1904.

\ JAMES WlNDRlDG-E;

Witnesses:

IRADELL L. COOK, HARRY F. PENNIMAN.