US549058A - Photographic retoucher - Google Patents

Description

(No Model.)

J. N. OH'OATE.

PHOTOGRAPHIG RETOUGHE R.

No. 549,058. Patented Oct. 29, 1895p,

INVENTOH JrF/zrz J)? 020% WITNESSES: N r M A TTOHNE Y8.

ANDREW EGRANAM. PHDTO'UTHQWASHINGIUN. D.C

UNITED STATES PATENT OFFICE,

JOHN CHOATE, OF CARLISLE, PENNSYLVANIA.

PHOTOGRAPHIC RETOUCHER.

SPECIFICATION forming part of Letters Patent No. 549,058, dated October 29, 1895.

Application filed November '7, 1894- Serial No. 528,158. (No model.)

To aZZ whom it may concern:

Beitknown that I, JOHN N. OHOATE, of Carlisle, in the county of Cumberland and State of Pennsylvania, have invented a new and useful Improvement in Apparatus for Retouching Photographic Negatives, of which the following is a specification.

It is the object of my invention to provide an improved hand instrument for retouching photographic negatives. Heretofore one means for performing this work has been a retouching-pencil or stylus arranged to reciprocate in guides and actuated by the blows of a hammer fixed to the vibrating armature of a small electric motor, which practically con stitutes the handpiece, and another means has consisted of a retouchingpencil and an electric motor having a flexible connection formed of a helical spring.

In my invention I secure the retouchingpencil to the frame of the handpiece or m0- tor, so that it forms an inflexible immovable part of the instrument while in use, and the armature of the motor is so arranged that no part of it can touch the pencil or any portion of the frame of the motor, so that it vibrates entirely free, and thus imparts a tremulous movement or vibration to the motor and the hand of the operator in which it is held, whereby the pencil-point is caused to make a rapidly-recurring but very slight impact on the negative, and thus produce the most delicate retouching elfect possible.

In accompanying drawings, Figure 1 is a side view of my electromagnetic retouching apparatus, and Fig. 2 is a perspective view showing the apparatus held in the hand as required in practice.

A represents the iron framework, which carries the electromagnets B. This framework is so constructed as to form a convenient handpiece or handle adapted to be grasped and held in the hand, as shown in Fig. 2, the body of the instrument lying next the upper portion of the palm and the index finger extending alongside of and resting upon the pencil P forthe purpose of guiding and directing the same with the required precision.

The pencil is held rigidly or as an immovable infiexible part of the instrument when in use, and thus makes every movement of the motor proper. As shown, it is arranged at one side or end of the framework of the latter.

The framework is provided with two binding-posts a a, with which circuit-wires b I) connect in the usual way, and in practice extend thence to a battery. (Not shown.) The spring-armature c is weighted at its free or outer end and placed parallel to the ends of the magnet-cores, being arranged so far similarly to the armatures of hell and other alarm or annunciator electromagnetic apparatus; but, unlike such armatures, it is not arranged nor adapted to strike upon any portion of the apparatus, but vibrates free without touching the framework or pencil. This operation is provided for and assured by making the spring of a certain thickness or stiffness, (having, of course, due reference to the ordinary normal or maximum strength of the battery employed,) also by duly weighting the free end of the spring, and by arranging for ample space for free vibration of the same above the magnet-cores and the pencil, so that it shall be incapable of striking on the same. Thus when the electric current is applied the armature c swings or vibrates free and evenly without striking or other contact with pencil or adjacent portion of the frame A, and thus imparts aslight tremor or secondary vibration to the instrument and the operators hand which incloses it, so that the penoil-point makes a correspondingly slight vibratory movement or an even and light rebounding touch or stroke, as distinguished from one in which a sudden and heavy jarring stroke is produced by imparting a sudden blow or impulse to the pencil. The result is a delicate retouching elfect on the negative, which was previously unattained. It will be seen that as a summary of the foregoing such result is due to two factorsnamely, the before-described rigid attachment of the pencil to the framework of the instrument and the gentle and even vibration imparted to the instrument, including the pencil.

The set-screw held in the outer end of the armature 0 serves as an additional weight for the same. When it is desired to cause the pencil P to make heavy strokes in putting in high lights and drapery, &c., the screw may be adjusted to cause it to strike upon the head of the pencil.

WVhat I claim is- 1. The improved hand instrument for retouching negatives, which consists of a rigid framework adapted to be held in the hand, a retouching pencil which is an inflexible, im-

movable attachment of one end of said framework, a vibrating device which forms part of said instrument the same being arranged as shown and described, whereby it is adapted to vibrate free or without contact with the pencil or adjacent portion of the framework, as shown and described.

2. The improved magneto-electric instrument or motor for retouching photographic JOHN N. CI-IOATE.

WVitnesses:

J. S. WEARING, J NO. B. LANDIS.

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