US1262729A - Copy-holder. - Google Patents

Description

F. G. YAWMAN.

COPY HOLDER.

APPLICATION FILED JULYZ, 1917- O 1 O Q SA WA flmrmnttanrg 2 SHEETS-SHEET 2,

F- G. YAWMAN,

COPY HOLDER.

APPLICATXON FILED JULYZ, I917.

Patented Apr, 16,

5 7 av 7 l 1 h fi 3 I o HHILNUJHI w u M M v I m w :"d m WM 2 m H m 0 H. w 2 fl 4 MM 1 a a 3 w 1/ 2 3 "W 0 5/ QM Q o on emu FREDERICK G. YA, OF ROCHESTER, NEW Y0 3:. ii;

- COPY-HOLDER.

Specification of Letters latent.

Application filed July 2, 1917. Serial No. 178,186. I

To all whom it may concern:

Be it known that I, FREDERICK G. YA MAN, a citizen of the United States, and resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Copy-Holders, of which the following is a specification.

The present invention relates to copy holders and more particularlyto the type in which a line guide and a work support are relatively movable so that successive lines on the work may be indicated by the line guide, an object of this invention being to provide an improved'means for effecting the relative movement between the line guide and the work support whereby any desired line spacing-may be obtained and the moving part may be readily returned toits initial position. I Another object of the invention is to provide an improved means for absorbing the shocks due to the return movement of v the moving part.

To these and other ends the invention consists of certain parts and combinations of parts all of which will be hereinafter dey scribed, the novel features being pointed out in the appended claims. In the drawings Figure 1 is a front view of a copy holder embodying the present invention;

Fig. 2 is a horizontal section through the copy holder;

Fig. 3 is an enlarged detail view of the elevating means of the copy holder;

F Fig. 4 is a vertical section on the line H, 1g. 3;

Fig. 5 is a vertical section on the line 55,

Fig.2;and i V Fig. 6 is an enlarged sectional view showing the coiiperation between the bumper at the upper. portion of the stationary frame and the movable copy holder.

While the invention is herein illustrated as embodied in a construction in which the work support moves with relation to the line guide, it will be understood that l[ do not limit myself to this arrangement.

In the illustrated embodiment of the invention there is employed a stationary frame comprising preferably a base member 1 having guides 2 extending upwardly therefrom in parallel relation, said guides being in the form of rods, secured at. their lower ends to the base member 1, and connected at their upper ends by a cross-piece 3, the latterbeing Patented Apr. 16, 11ers.

formed from sheet metal and rolled at its ends to form tubes 4: surrounding reduced portions 5 at the upper end of the rods 2. The loweredge of this cross-piece 3'is bent rearwardly at 6, and has a swinging member 7 pivoted thereto at 8 and extending in rear of the frame. A second member 9 is pivoted to the member 7 at 10, and has a line guide 11 pivoted thereon at 12, the member 9 being arranged to lie in front of the stationary frame so as to position the line guide in front of said frame.

Operable on the stationary frame is the movable work support 13, the latter preferably being formed from sheet metal and having its opposite edges rolled at-14 to provide guides operating on the guide rods 2. A work clamping device 15, which is not herein claimed but forms the subject matter of another application, is arranged at the upper portion of the work support 13, while a loop 16 is provided at the upper end of the.

work support for securing those leavesof the work which are swung upwardly over the edge of the work support.

The mechanism for producing a relative movement between the work support and-the line guide, in this instance, embodies an operator 17 preferably in the form of a hand wheel on a shaft 18, which is mounted to turn within the forward extension. 19 on the base member 1. At its rear end, the shaft 18 is provided with a friction gear wheel 20, the latter engaging within the grooved periphery of a friction gear wheel 22 which is journaled on a stub shaft 23 artranged on the base member 1 in. rear of the guides 2. Connection between the friction wheel 22 and the work support 13 is preferably established by a, .flexible connector 24, in this instance in the form of a tape piece about the friction wheel 22 preferably in Y the groove of the latter and extending from said wheel upwardly over a grooved pulley 25 journaled at 26 in the upperiportion of a hollow standard 27, which projects upwardly from the base member 1 between the guides 2. From the pulley 25the flexible connector 2t leads to and is connected with a, bracket 28 which is secured to the rear face of the work support 13 near the lower edge of the latter. It is apparent that when the opera- I .tor 17 is turned in the direction of the arrow, Fig. 1, the tape 24 will be wound on the drum and friction wheel 22, and will ele'-. veto the work support 13.

With the object in view of preventing the descent of the work support 13 except when desired, the shaft 18 carries a toothed wheel 29 with which cooperate two pawls or dogs 30 and 31 mounted to turn on a common axis formed by a screw bolt 32 secured in the stub shaft 23. The respective teeth 33 and 3 1 of the dogs 30 and 31 are located at different distances from the common pivot of the dogs, so that the dogs alternately engage the ratchet wheel 29, thus permitting .the work support .to partake of a finer adjustment than would be possible with only one dog.

To permit the descent of the work support 13 the friction wheels 20 and 22 act as a make-and-break, motion-transmitting connection between the work support and the rotary operator 17, and to this end one of said wheels has a movement transversely of its axis relatively to the other wheel. This is accomplished, in this instance, by laterally widening the bearing at the inner end of the shaft 18, as-at 35 Fig. 5. Normally the shaft 18 is held toward the friction wheel '22 by a spring 36 which is, in this instance, formed of a coil secured at one end at 37 to the shaft 18, and at the other end to the screw 32. The lowering of the work support is effected 'by attempting to turn the operator 17 counterclockwise, or in a direction opposite that of the arrow shown in Fig. 1. This causes the shaft 18 to move laterally in the bearing enlargement 35, due

to the engagement of one of the teeth 33 or 34: cooperating with the toothed wheel 39 and acting as a fulcrum. With the lateral movement of the shaft 18, the friction wheel 22 is freed and the work support 13 descends under its weight. This descent may be stopped at any time by releasing the operator 17 to permit the spring 36 to throw the friction -wheel 20 into contact with the friction wheel 22.

Retardation of the descent of the work support 13 may be effected by a spring 38 preferably in the form =of a volute coil arranged within "the drum or friction wheel 22, and havingits inner end secured at 39 to. said wheel, and its outer end secured at 40 to a'screw which is fixed in the base member 1. A cover plate 411 may be'em ployed for inclosing the spring within the drum or friction wheel 22, said cover plate being held against rotation by the screw 40, and at the same time surrounding the stub shaft 23.

To prevent jar at the extreme lower limit of the work support, the stationary frame is preferably provided, with two lenders, in this instance, in the form of rubber pieces 42 fitted in the upper ends of tubes t of the cross piece 6, so as to cooperate as the latter let reaches the lower limit of its movement with a head of -abutment situated on the rear face of the work support near the upper ed e of the latter. v

rom the foregoing it will be seen that there is provided a copy holder in which the elevating means is controlled by an operator which is rotated in but one direction, said operator having a second movement to release the work, the operator being secured to a rotary shaft which is shifted laterally on said second movement of the operator to throw two gears out of cooperation. Counterbalancing means for the moving part is connected to one of said gears, and buffers are arranged so that an efiective stop of the work support is secured without any rebound.

The feature of providing a make-andbreak, motion-transmitting connection between a rotary operator and the moving part of the copy holder controlled by the rotary operator is not claimed broadly herein, but forms the subject matter of an application filed by me on April 17, 1916, Serial No. 91,584. I

What I claim as my invention and desire to secure by Letters Patent is:-

1. In a copy holder having a work support and a line guide; means for effecting relative movement between the work support and the line guide comprising two cooperating rotary gears, means for holding one of said gears from turning in one direction, means connecting the other gear to i part of the copy holder and the rotary shaft,

controlled by the transverse movement of the shaft.

3. In a copy holder having a work supportand a line guide; means for effecting relative movement between the work support and the line guide comprising a rotary shaft having a transverse movement, a

ratchet on the shaft, a pawl cooperating with the ratchet and mounted independently of the shaft, and a make-and-break, motiontransmitting connection between the moving part of. the copy holder and the shaft, controlled .by the transverse movement of the shaft produced through the engagement of the pawl on the reversing of the rotatihn of the shaft.

t. In a copy holder having a work support and a line guide; means for efiecting a relative movement between the work sup- 13i port and the line guide comprising a rotary operator, a shaft on which said operator is mounted having a transverse movement at one end, a ratchet wheel on the shaft, a pawl mounted independently of the shaft and engaging the ratchet wheel, a gear on the shaft, and a gear independently mounted, connected to the moving part of the copy holder and adapted to be disengaged by the gear on the shaft when the latter is moved laterally with the shaft.

5. A copy holder as set forth in claim 4 combined with a spring normally tending to resist the transverse movement of the shaft to hold the two gears in cooperation.

1.6. In a copy holder having a work support and a line guide; means for effecting relative movement between the work support and the line guide comprising a flexible connector secured to the moving part, a

grooved wheel in which said flexible connect'or is wound, and a gear adapted to fricframe, a work support guided vertically on v the frame, a bumper arranged at the ,top of the stationary frame and an abutmenton the work support at a point nearer the top of the work support than the bottom.

FREDERICK G.

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