US873002A - Spectacle-clamp. - Google Patents

Description

No. 873,002. PATENTED DEC. 10, 1907.-

s A ASQUITH SPEGTAGLE CLAMP. APPLICATION FILED SEPT. 17, 1907.

.M R- mm m0 m8 A t r. BY e s 'tions 0 of the clamp-supports e.

STEAD ALBERT ASQUITH, OF WATERLOO, IOWA.

SPECTACLE-CLAMP.

Specification of Letters Patent.

Patented-Dec. 10, 1907.

Application filed September 17,1907. Serial No- 3931339.

To all whom it may concern:

Be it known that I, STEAD ALBERT As- QUITH, a citizen of the United States of America, and a resident of Waterloo, Blackhawk county, Iowa, have invented certain new and useful Improvements in Spectacle- Clamps,- of which the following is a specification.

My invention relates to spectacle clamps, and the object of my improvement is' to provide for jewelers and Opticians a convenient tool whereby spectacles or other small articles may be safely and securely clamped down in a proper position for making repairs thereon, such device being furnished with means for adjusting the tension upon the clamps as desired according to the character of the use to which such means are put, and with a non-combustible table or rest upon which broken parts may be brazed or welded without injury to the implement. This obj ect I have accomplished by the means which are hereinafter described and claimed, and which are illustrated in the drawings hereto annexed, in which Figure 1 is a perspective view of my improved clamping device, as in use to hold a pair of spectacles while under repair. Fig. 2 is an enlarged detail view of one of the adjustable tension-springs and its dentated mounting.

Similar letters refer to similar parts throughout the several views.

As a suitable table or base for my improved clamps to contact with I have illustrated a metallic tray a, supported on downturned legs Z, which may be formed by cutting them out from the base of the tray except on one side and then turning them down. This tray a is filled with a non-combustible material I), such as asbestos, so that the impinging of the flame of a blow-pipe thereon may effect no injury. Certain portions 0 of one of the longitudinal upper edges of said tray are projected upward and then bent outwardly to form cylindrical bearings in the same alinement for the rock-shaft por- A separated pair of bearings c are provided for each rockshaft 0, and between each pair of bearings the edge of the tray is upturned and bent rearwardly to form a semi-cylindrical rack h having on one curved edge the dentations k.

A coiled spring 01 is seated about each of the rock-shafts 0 under the rack-plate 7r, one end of said spring at m being bent over and hooked within an orifice in the rock-shaft to secure it in a fixed position, while the other end of the spring is free and bent over and prolonged to form a tangential finger-piece j, which may be sprung between any of the teeth 74 on the rack-plate h as desired to vary the tension upon the clamp-supports e.

The character f designates a clamp which is pivotally connected to each of the downturned forward ends of the clamp-supports e, so as to be capable of being rotated in approximately a horizontal plane. These clamps f are shown as being centrally pivoted, and as having one bifurcated end each, the latter being useful, as illustrated in Fig. 1, to hold two ends of any object to be brazed together, such as a broken spectacleframe a, fractured at g. The form of the clamp f may, however, be varied as desired, without going beyond the scope of my invention.

Each rock-shaft 0' is provided with a are suited to hold any small article with equal pressure thereover, but with any suitable tension desired.

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

1. 'A device of the character described, composed of a base-plate, bearings thereon, a rock-shaft in said bearings, a clamp-member extending from said rock shaft and adapted to contact with said base-plate, a dentated rack-plate supported by said baseplate, and a spring one end of which is secured to said rock-shaft and whose other end is adapted to be adjustably engaged with said dentated rack-plate.

2. A device of the character described, composed of a base-plate, a non-combustible pad thereon, bearings extending from said base-plate, a rock-shaft in said bearings, a clamp-memberextending from said rockshaft and adapted to contact with the pad on said base-plate, a dentated rack-plate supported by said base-plate, and a spring one end of which is secured to said rock-shaft and whose other end is adapted to be adjustably engaged with said dentated rackplate.

3. A device of the character described,

ings in alineinent thereon, a plurality of rockshafts each one mounted in certain of said bearings, one end of each rock-shaft being projected outwardly to form a crank-handle and its other end being projected inwardly to form a clamp-support, a clamp pivotally secured to the inward end. of each clampsupport, a dentated rack-plate supported adjacent to each rock-shaft, andsprings each having one end secured to one of said rockshafts with its other end adapted to be adjustably secured between any of the dentations on the adjacent rack-plate.

4. A device of the character described, composed of a base-plate, a non-combustible pad thereon, a plurality of alined bearings supported by said base-plate, a plurality of rock-shafts each one being mounted in oer tain of said bearings, one end of each rockshaft being projected outwardly to form a crank-handle and its other end projected inwardly to form a clamp-support, a bifurcated clamp pivotally secured to the inward end of each clamp-support, a dentated rackplate supported adjacent to each rock-shaft, and springs each having one end secured to one of said rock-shafts with its other end adapted to be adjustably secured between any of the dentations on the adjacent rackplate.

Signed at Waterloo, Iowa, this 29th day of August, 1907.

S. ALBERT ASQUITH. WVitnesses:

G. G. KENNEDY, O. D. YOUNG.

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