US613556A

US613556A - Watch-dial fastener

Info

Publication number: US613556A
Authority: US
Priority date: 1897-06-12
Filing date: 1897-06-12
Publication date: 1898-11-01
Anticipated expiration: 1915-11-01

Description

N0. 6|3,556. Patented Nov. I898. J. W. BROWN.

WATCH DIAL FASTENER.

(Application filed June 12, 1897.)

(No Model.)

wvewtoz ejmefiiffbrawn y a-btomm ms NORIHS PEYERS ca. vnmauwo, WASHWGTON u. c.

UNITED STATES PATENT FFICE.

JAMES M. BROWN, OF ORTONVILLE, MINNESOTA.

WATCH=DEAL FASTENER.

SPECIFICATION forming part of Letters Patent No. 613,556, dated November 1, 1898.

Application filed Tune 12, 1897- Serial No. 640,534.- (No model.)

To all whom it may concern.-

Be it known that I, J AMEs VM. BROWN, of Ortonville,in the county of Big Stone and State of Minnesota, have invented certain new and useful Improvements in Eccentric Dial-Fasteners; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in fasteners for watch-dials, the object of the same being to provide a device or devices of this character which will effectually secure the dial in positive engagement with the watch-plate, the fasteners being of such construction that they will act to draw the dial in close engagement with the plate.

To this end the invention consists of a fastener presenting cams or eccentrically-pivoted plates carried by the watch-plate and adapted to engage recesses in one side of the feet or pins which project from the dial, the cams having an inclined surface upon which the feet ride, a recess and shoulder being provided to limit the throw of the cams, as well as hold the same by frictional contact.

In the following specification I have entered into a detailed description of the invention, reference being had to the accompanying drawings, and to numerals thereon which designate the difierent parts, and what I consider to be the novel features of construction are specifically set forth in the claims.

In the drawings forming part of this specification, Figure 1 is a plan view of a watchplate having my improved fastening device attached thereto. Fig. 2 is a sectional View through the watch plate and dial, the latter being fastened in place. Fig. 3 is an enlarged detailed View of one of the cams. Fig. 4 is an edge View of Fig. 3. Fig. 5 is a plan View of the watch-plate, illustrating a modification of the invention.

Referring to the drawings by numerals, 1 designates the watch-plate, and 2 the dial, the latter having projecting feet 3 extending from the back thereof. These feet are provided on one side with recesses l, presenting a straight shoulder, upon which the fastening device hereinafter described bears in securing the said dial in place.

5 designates my improved fastener or looking-plate, which is of peculiar configuration to present a cam-surface 6 on one side of its bearing and a projection or operating end 7 on the other side of said bearing, the latter having a curved edge 8, corresponding with the curve of the depressed periphery of the watch-plate, and at the end of said curved portion the locking-plate is beveled, as shown at 9, from which extends a straight edge 10. This locking plate or cam is connected to the watch-plate to have a swinging movement thereon by a machine-screw 10, having a shoulder 11 adjoining its head, the said shoulder forming the bearing-surface for the cam. The cams are pivoted upon the watch-plate adjoining the holes 12 therein, through which the feet of the dial pass, and the parts of the cams which engage the recess a in said feet are provided at their under sides with an inclined surface so disposed that it will ride upon the shoulder forming the bottom of the recess in the feet. Thus when the cams are brought into engagement with the feet of the dial they will not only look the same,but the inclined surfaces hereinbefore mentioned will tend to draw the dial tightly and firmly against the watch-plate. The cams are arranged near the edge of the watch-plate and the operating end so disposed that when the cams are disengaged from the feet the said ends will be projected beyond the periphery of the watch-plate, and when the cams are thrown to the limit of their movement in their opposite direction the curved surface 8 will be flush with the depressed periphery of the watch-plate, while the straight portion 10 bears against a stop and the bevel 9 provides for the insertion of an implement in operating the cam. The upper face of the cam is provided with a beveled portion 13, adjoining a slot 14:, and forms a tongue that enters a recess in the watch-plate and acts to hold the cam in locked engagement by frictional contact.

Though I have shown the cams or fasteners applied to a watch-plate having a raised edge with slots through which the operating ends of said cams pass, it is evident that the cams could be located upon the under side of the watch-plate, or in case a thick watch-plate is used they could be let into recesses at the edges thereof. It will be noted that when the cams are locked in engagement with the feet of the dial the operating ends are brought flush with the periphery of the watch-plate, and when the said plate is placed within the watchcase a movement of the cams will be positively prevented. This peculiar manner of connecting the dial to the watch-plate provides a fastening for the purpose which will properly hold the dial in place and will draw the same tightly against the watch-plate to prevent any movement or rattling of the same. The construction also provides for readily and conveniently removing the dial-plate in repairing the watch.

In the modification I have shown an arrangement by which instead of providing a number of cams or fasteners one is connected to circular strip 15 upon the watch-plate by screws 16, which engage slots therein, the ends of the said strip having inwardly-projecting portions 17 17, which engage the recesses in the feet when the cam 18, which controls the movement of the strip, engages its foot. The cam 18 is of the same construction as the cams 5 and is let into a recess in the under side of the curved strip, engaging the end walls of the recess in the said strip as the cam is operated. It will be noted that the projections 1.7 at the ends of the strip 15 are disposed on opposite sides of the holes through which the dial-feet pass, so as to properly engage said feet.

It will be understood, of course, that though I have described my invention as being applied to a watch-dial the same device could be employed in securing the dials of larger timepieces in engagement with the backingplate, though the fastener is particularly adapted for watches, as the dial is usually very thin.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a fastening for watch-dials, the combination, of the watch-plate having a hole therein, a cam-plate or eccentric, pivoted to the watch-plate adjoining the hole, and an operating arm or member extending from said cam or eccentric; the end of the arm being curved to correspond with the periphery of the watch-plate; together with the dial-foot having a recess or shoulder, the cam-plate being so located that the end of the operating-arm will be flush with the periphery of the watch-plate when the cam is in engagement with the foot, and projected beyond the same when the cam is disengaged, for the purpose set forth.

2. In a fastening for watch-dials, the combination, of the watch-plate having a hole therein and a recess or depression adjoining the hole, a cam-plate or eccentric pivoted to the watch-plate, a spring-tongue on the cam adapted to engage the depression or recess in the watch-plate, and an operating arm or member extending from said cam through one side of the watch-plate; in combination with the dial-foot having a recess or shoulder.

3. In a fastening for watch-dials, the corn bination, of the watch-plate having a hole therein and a recess or depression adjoining said hole, a cam-plate or eccentric having an inclined surface at its outer edge, a springtongue on said cam-plate formed by an openended slot in the edge thereof, and an arm or member extending from the cam-plate or eccentric, the outer end of said arm being curved to correspond with the periphery of the watchplate being flush therewith when the camplate is turned in one direction and projected beyond the same when said cam plate is thrown in the other direction, together with the dial-foot having a recess or shoulder, as shown and described.

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

JAS. WM. BROWN. Witnesses:

HAYDEN FRENCH, A. B. OLANoY.