US296055A - pieece - Google Patents

Description

(No' Model.)

H. PIERCE.

STEREOSGOPE. I

No. 296,055. Patented Apt 1, 1884.

UNITED STATES PATENT OFFICE.

HOMER E. PIERCE, OF BROOKLYN, NEW YORK.

STEREOSCOPE.

SPECIFICATION forming part of Letters Patent No. 296,055, dated April 1, 1884.

Application filod January 14, 1884. (No model.

scopes that are provided with ahandle orst-andard that is hinged to the base of the instrument, whereby it may be rocked on the handle or base and set at any desired angle therewith; and it consists in the devices herein described and claimed, whereby the instrument may be readily and conveniently locked in any desired position and unlocked and shifted therefrom.

Figure 1 is a side view in outline of I a stereoscope, to the base of which is hinged a handle, in the hinge of which is contained my in- .vention. Fig. 2 is an edge View of the parts constituting the hinge, together with detached portions of the handle and base of the instrument in section. Fig. 3 is a side view, partly in section, of detached parts of the said base and handle and hinge; and Fig. 4 is a similar view, showing the opposite side of the same.

A represents a stereoscope. B is a toothed segment made fast on one of its straight edges to the under face of the base a of the instrument. Preferably the segment is riveted or otherwise secured to a metal plate, I), that is fastened by screws or otherwise to said base. To this segment the handle 0 is hinged by means of jaws or plates 0 c, that project from the end of the handle, one on either side of the segment. A pin, 01, passing through the said plates and segment, secures the plates and segment together, and forms the pivot'of a hinge on which. the segment may swing back and forth between the plates. The hole f in the segment through which the. said pivotal pin passes is slotted, as shown, so that the handle may be shifted up and down on the segment into the position shown in Figs. 1 and 4, or that shown in Fig. 3. A stop-pin, e, passing through both plates 0 c, is rigidly secured in place, and it is so placed relatively to the pivotal pin d and the teeth of the segment that when the handle and plates 0 c are pushed upward so that the pivotal pin is at the upper end of the slotted hole f, the stoppin cwill engage the teeth on the segment, I

and when they are drawn down so that the pivotal pin is at the lower end of said holef, the said stop-pin will be disengaged from said teeth. j r

The platesc 0 may be made to suitably. grasp the segment, so that the friction between them shall prevent their undesired movement in the hinge and make it necessary to exert a little force to shift the plates on the segment, as described.

It is evident that the instrument may be set at any desired angle on the handle or on a standard set in a base (which may be used instead of asimple handle) and then locked in.

position by forcing the segment down into engagement with the described stop pin, and that the position of the instrument may be altered by disengaging the stop-pin from the segment and swinging it on its hinge.

I do not intend to'limit myself to the precise form and construction or position of the stoppin. Any equivalent stop attached to the handle or hinged plates may be employed. So, also, if preferred, in place of two independent plates inserted in the end of the handle, a single shank, rod, or plate forked at the: upper end maybe used.

I have described my lock-hinge as applied to a stereoscope; but it is obvious that it may be equally applicable to a graphoscope or any other analogous instrument.

What I claim as myinvention, and desire to secure by Letters Patent, is

The combination, with a stereoscope and its handle or standard 0, of the described lockjoint formed of the jaws c 0, provided with the slots f and stop-pin e, and the toothed seg ment B, pivoted in the said slot between the said jaws, as and for the purpose described.

HOMER E. PIEROE.

Witnesses:

A. G. N. VERMILYA, A. S. FITCH.

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