US351853A - Photographer s camera attachment - Google Patents

Description

(No Model.)

P. COLLINS.

' PHOTOGRAPHBRS CAMERA ATTAGHMENT. .3513 Pttd 8.

W/T/VESSES: l/VVE/VTOI? fig By I r WW 6/ I ATTORNEY N. PETERS, Phola-Lillwuraphcr. Washington, ac

UNITED STATES PATENT OFFICE.

FREDERICK COLLINS, OF ST. JOSEPH, MICHIGAN.

PHOTOGRAPH ERS CAMERA ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 351,853, dated November 2, 1886.

Application filed January 5, 1886. Serial No. 187,653. (No model.)

To all whom, it may concern:

Be it known that I, FREDERICK COLLINS, of St. Joseph, in the county of Berrien and State of Michigan, have invented certain new and useful Improvements in Photographers Camera Attachments; and I do hereby declare that the following is a full, clear, and exact description ofthe invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form apart of this specification.

Great difficulty has heretofore been experienced by such photographers, professional and amateurs, as use sensitive dry-plates when photographing, by reason of small particles of dust and dirt collecting on the face of the same when placed in camera just previous to its ex posure. This heretofore has been considered a necessary evil, and has made it necessary to resort to the process known as touchingup, in order to remove the spots and ble1n-' ishes from the negative, so that when printed from the positive will not be marred.

It is the object of myinvention to avoid the aforesaid difficulty,and to a very great extent dispense with the labor and expense of touching-up. This Iaecomplish through the agency of a soft brush-a simple but effective means, which is operated within the camera, to lightly brush the dust and dirt from the face of the sensitive plate after the receptacle it is in is opened just previous to the exposure of the plate.

In the drawings, Figure 1 is a front view of a plate-holder having a brush on the inner edge of the slide. Fig. 2 is a transverse horizontal view of the same. Fig. 3 shows the application of my invention to a vertical frame for lifting the cover of a box holding the plate. Fig. 4 shows a front elevation of devices for reciprocating the brush laterally, and for so operating it that it will brush the plate only when moving in one direction. Figs. 5 and 6 are detail views of the same, and Fig. 7 shows devices for oscillating the brush.

My invention is intended to cover any kind, of a soft brush which can be operated within the camera to-remove from thefaee of the dryplate the dust, &e. For this reason it is in1- material how the brush is operated, whether attach the brush to the lower cross-bar of the vertically-reciprocating frame or slide, which lifts the cover of the box holding the sensitive plate from before the same, substantially as shown in a pending application of mine for photographers camera attachments and as shown in Fig. 3.

The brush could, if desired, be operated by attaching one end of its back to the end of a rocking spindle which is journaled in longitudinal bearings in or near one of the lower angles of the frame to which the plate-holder is aifixed. This rocking spindle extends beyond its bearings to the rear of the camera, where it is provided with a hand-grasp within convenient reach of the operator. This way of operating a brush is shown in Fig. 7.

If the brush is reciprocated vertically or latera1ly,it might be advisable to so construct the devices for operating it that when moved from its normal position it will be parallel to the plate, and when being returned to said normal position will oscillate so as to be at right angles to and lightly brush the same. This result is desirable, for the reason that when the brush sweeps but in one direction it carries the dust before it; consequently there is less likelihood of the brush depositing particles of dust aswhen the brushing is reversed. In order to accomplish this I provide grooves a a in the inner surfaces of the upper and lower cross-pieces of the rectangular frame A, in the rear of the camera, and in which the sensitive plate is placed. These grooves a are lateral to the camera, and are on the same vertical plane. v

Placed and having a reciprocal motion in the lower groove a is a rod, B, the length of which corresponds to the distance from the inner surface of the vertical side of frame A, at one side, to and through suitable openings, 1), in alignment with said groove in the opposite side piece. At the latter and outer end of this rod B is a hand-grasp, which can be grasped by the operator to reciprocate said rod, the throw of which latter corresponds to the distance between theinner surfaces of the side frames of frame A. Secured to the inner end of rod B, and projecting vertically therefrom into groove a in the contiguous surface of upper cross-piece of frame A, is an arm, 0. Loose on this arm, between grooves a, is a sleeve, D, which may form the back of or have secured to it a brush, E. In order to give said brush E a position parallel with the sensitive plate when the rod B is drawn out and oscillate it a quarter of a circle toward said plate, so that it may be at right angles to and brush the same, I project a stud, c, from near the lower end of sleeve D, which, when it strikes post (I, (located beside and at or near the end of the groove a nearest the hand-grasp of rod 13,) oscillates the brush to a position at right angles to the plate. As the brush is being moved back to its original position it brushes the plate, and when at or near its original position the stud c strikes against post 6 at the end of the groove opposite to post (I, and oscillates the brush back to its original position-21 0., parallel to the contiguous face of the plate. In order to limit the oscillation of brush E, I make anywhere in the sleeve a transverse segmental slot describing a quarter of a circle, and project through it a pin, h, permanent in said arm 0. Thus the sleeve and brush connected thereto can oscillate a distance corresponding with the length of said slot. If desired, the oscillation need not be limited. In this event the slot 9 and pin it may be dispensed with. In order to convert this into an arrangement for reciprocating a non oscillating brush, I dispense with the sleeve, the stud projecting therefrom, and the stops against which the stud strikes, and attach the brush permanently to the arm 0. Another feature of this lastdesoribed apparatus is the packing of the bearings of rod B where it passes through the side piece of frame A, in order to prevent the light from entering the camera except through the lens. I also prefer to pack the spindle of the oscillating brush hereinbefore described. The packing may be omitted, however, without departing from the spirit of my invention.

\Vhat I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with a photographefls camera and means for holding therein a sensi tive plate, of a brush adapted to be moved in front of and brush the sensitive plate.

2. The combination, with a photographers camera and means for holding therein a sensitive plate, of a brush having a lateral reciprocal motion in front of said plate, and adapted to brush the face of the same within the camera.

3. The combination, with a photographers camera and means for holding therein a sensitive plate, of a reciprocal brush having an oscillatory motion, so that it will brush the plate when moving in one direction, and will escape it when the motion is reversed.

4c. The combination, with a photographefis camera and means for holding therein a sensitive plate, of frame A, having grooves a a in the inner surfaces of the cross-pieces thereof, rod B, arm 0, and brush E.

5. The combination, with a camera frame, A, and means for holding therein a sensitive plate, of rod 13, vertical arm 0, sleeve D, loose on said arm, and having a stud, c, projecting from the lower end thereof, and posts (1 and e.

6. The combination, with a camera frame, A, and means for holding therein a sensitive plate, of rod B, vertical arm 0, sleeve D, loose on said arm, having a stud, c, and having a transverse segmental slot, 9, and stops d and c, said arm 6 having a pin projecting laterally from it through the said slot g in sleeve 0, as and for the purpose set forth.

In testimony that I claim the foregoing as my own I hereunto affix my signature in presence of two witnesses.

FREDERICK COLLINS.

\Vitnesses:

James II. COYNE, FRANK D. TiroMAsoN.

Images