US701096A - Line-spacing mechanism for type-writers. - Google Patents

Description

No. 70|,096. Patented May 27 I902. E. S. SHIMER.

LINE SPACING MECHANISM FOR TYPE WBlTEfiS.

(Application filed Feb. 8, 1902.)

(No Model.)

2 sheets -sheet I.

No. 70!,096. Patented May 27, I902. Y

E. S. SHIMER. LINE SPACING MECHANISM FOR TYPE WRITERS.

(Application med Feb. 8. i902 (No Model.) 2 Shuts-Sheet 2,

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ma v UNITED STATES PATENT OFFICE.

ELMER S. SHIMER, OF MILTON, PENNSYLVANIA.

LlNE SPACING MECHANISM FOR TYPE-WRITERS.

.ESPECIFIGA'I'ION forming part of Letters Patent N 0. 701,096, dated May 27, 1902.

Application filed February 8, 1902. Serial No. 93,176. (No model.)

T0 ctZZ whom it may concern.-

Be it known that I, ELMER S. SHIMER, a citizen of the United States, residing at Milton, in the county of Northumberland and State of Pennsylvania, have invented new and usefullmprovementsin Line-SpacingMechanisnl for Type-WVriters, of which the following is a specification.

My invention relates to improvements in line-spacing mechanism for type-writers; and one object of the same is to construct aninterlnittent pawl-and-ratchet mechanism which will effectively prevent the overthrow thereof.

The simple and novel construction employed by me in carrying out my invention is fully described in this specification and claimed, and illustrated in the accompanying drawings, forming a part thereof, in which Figure l is an end elevation of carriage equipped with my device. Fig. 2 is a perspective of the pawl and ratchet. Fig. 3is a bottom plan view of the same. Fig. 4 is a detail of the brake. Fig. 5 is a detail view of the pawl and a fragment of the rock-shaft.

Like numerals of reference designate like parts in the different views of the drawings.

The numeral 1 designates a revolublymounted platen supported on a carriage 2, shown in fragment only, and having a round front bar 3 and an end bar 4. The bar 1 has an enlarged recessed portion 5, having a shoulder 6 formed thereon and is longitudinally apertured at 7 to accommodate a shaft 8, journaled therein and bearing a lever-arm 9, constructed to be worked by the right hand of the operator. A sector 10, having beveled cogs thereon, is keyed in the inner end of the shaft and is located to mesh with a sector 11, also having beveled cogs thereon and formed integral with a hub 12, revolubly mounted on the front bar 3 of the carriage 2. Also formed integral with the hub 12 is an upwardly-extending arm 13, having a pawl 14 pivoted therein on a pin 15. The pawl 14 is elbow-shaped, is pivoted at the angle, and has a downwardly-extending tail 16 and a tapering. head having a hooked bill 17. A ratchet 18 is secured to the end of the platen 1 and has a series of teeth 19 thereon, having concave inclines 20. The teeth 19 are designed to be engaged by the bill 17 of the pawl to throw the platen. The tail 16 forms a positive stop for the pawl, which limits its upward swing or rotation about the pivot 15. It is important to note that when the pawl is in engagement with the teeth of ratchet 18 and the tail 16 is in contact with the rock-arm 13 the hooked bill 17 engages one of the curved inclines 20 and securely holds the platen against turning in either direction.

A stop 21 is mounted on the arm 13 and is pivoted at 21. A lug 22 is formed on the upper end. Ears 23 on the sides of the stop limit its movement. When the stop 21 is in the position with the lug 22 beneath the pawl 14, the movement of the pawlis limited to throw the ratchet a distance of but one tooth; but when the stop 21 is set so that the pawl 14: will swing clear of the lug 22 and then come in contact with the body of the stop the pawl 11 can be actuated to rotate the ratchet a distance of two teeth. A spring 24, connected to the pawl, serves to restore it to its initial position after displacement. A spring 25, surrounding the shaft 8, serves to restore it to its initial position after displacement.

To hold the platen steady, I employ abrake. The numeral 26 designates an improved form of brake designed by me and comprising a spring-arm 27, secured to the carriage 1 and bearing a roller 28, engaging the teeth of the ratchet 18. In order to raise the roller 28 up out of engagement with the ratchet, a lever 29 is provided and pivoted to the arm 27. The lever 29 has a handle 30 and three legs 31, 32, and 33. The leg 33 on the outside is much shorter than the middle leg 32 and the other leg 31. In order to raise the roller 28 up out of engagement with the ratchet 18, it is only necessary to throw the lever 29 by means of the handle 30 until the two longer legs 31 and 32 comeinto engagement with the platen 1. The roller 28 will then clear the ratchet 18. To let the roller down, the lever is turned until it stands on the short leg 33 and the longer middle leg 32.

In view of the foregoing but little in addition is necessary to make the operation of my spacing mechanism clear.

In spacing, the lever 9 is grasped and pushed to the right, thereby rotating the shaft 8 to operate the sectors 10 and 11 to actuate the arm 13 and bring the hooked bill 17 into engagement with the ratchet. The stop 21 will limit the bite of the pawl, while the tail 16 will limit the reach of the same and hold the pawl against further upward movement, so that the engagement of the bill 17 with the concave incline of the ratchet will be positive as long as the lever 9 is held firm.

I do not Wish to be limited as to details of construction, as these may be modified in many particulars without departing from the spirit of my invention.

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

1. Inaspacingdevice,the combination with a platen, of 'a ratchet bearing teeth having concave inclines, a rock-arm, an elbow-pawl carried by said rock-arm and comprising a tail and a hooked bill, said tail being located to come in contact with said rock-arm to limit the movement of said pawl, and means for In testimony whereof I have hereunto set my hand in presence of two subscribing wit nesses.

ELMER s. SHIMER.

Witnesses:

W. H. BECK, JOHN A. KURTZ.

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