US1201874A - Full-stroke mechanism. - Google Patents

Description

D. R. ROWE.

FULL STROKE MECHANISM.

APPLICATION FILED MAR. 18. I915- 1,201,s74, Patented Oct. 17,1916.

awumto'o P R R 4 UNITED STATES PATENT OFFICE.

DON RAY ROWE, OF DAYTON, OI-IIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE DAYTON TIME LOCK COMPANY, OF DAYTON, OHIO, A CORPORATION OF OHIO.

'rULL-s'rRoKn MECHANISM.

Specification of Letters Patent. Patented O t, 17, 1916 Application filed March 18, 1915. Serial No. 15,203.

To all whom it may concern:

Be it known that I, .DON RAY ROWE, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented. certain new and useful Improvements in Full-Stroke Mechanism, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to a. full stroke mechanism and is in the nature of anim provement upon the full stroke mechanism embodied in an application for patent filed by Benard I-I. Ziehler and D. Ray Rgwe Feb. 20, 1915, Serial No. 9714. V V

While the invention is here shown as applied to a reciprocating platen of a recording device it will be understood that it is so shown for the purpose of illustration only and that it is applicable to any similar structure.

The object of the invention is to provide a single positively. actuated device which will prevent the return movement of a reciprocatory member before it has completed its full stroke in one direction. To this end it is a further object of the invention to provide a positively actuated pawl-controlling device and a positively actuated detent to cooperate with said pawl-controlling device.

A further object of the invention is to so construct and arrange the parts of the device that they will not onlv be simple and -positive in their operation but that they will not be easil disarranged or rendered inoperative; and that they can be readily manufactured and easily assembled.

In the accompanying drawings, Figure 1 is a side elevation of a mechanism embodying my invention showing the reciprocatory member at the beginning of its operative stroke; Fig. 2 is a similar view showing the reciprocatory member at the end of itsoperative stroke; Fig. 3 is a vertical sectional view, taken on the'line m a: of Fig. ,4; Fig. 1 1s a transverse, sectlonal view taken on the hue 3 3 of Fig. 3;.andF1g. 5 1s a detail view,

- on a smaller scale, showing the actuating device for the reciprocating member.

For the purpose of illustration I have, in the accompanying drawings, shown the'invention as applied to the reoi'procatory platen of a recording look. This platen is indicated by the reference numeral 1 and has a stem or portion 2 constituting a guide which is slidably mounted in a guideway formed in a bracket 3. As here shown the stem is hollow and has mounted in its upper end a plunger 4, between which and the platen proper there is interposed a cushioning spring 5. This feature of construction, however, is part of the invention of the above mentioned application. Connected with the platen and, in the present instance, to the plunger t'is an actuating member, here shown as a plate 6, having a slot to receive the plunger -1 which is provided with a head 7 to retain the same therein. This plateor. actuating member for the platen is meansemployed in the recording lock of the above mentioned application which comprises springs 9 secured to-the opposite ends of the plate '6 to hold the same normally in its elevatedposition and operating members or plates 10 mounted on a shaft 11 extending transversely to the line of movement of the plate 6 and-having parts on each side of the shaft adapted to engage the plate 6. and press the same against the tension of the springs 9 when said shaft is rotated in either direction,thus imparting lon gitudinal movement to the platen and the guide rod 8 for the plate 6. i

In applying the full stroke device to this mechanism I have provided the guide rod 8 of the plate 6 with a longitudinal series of teeth 12 which are here shown as ar- ,ranged ontthat side of the rod adjacent to the stem of the platen. A portion of the bracket lying between the rod and the stem of the platen is cut away to form a recess 13 in which is mounted a pawl 14 having connected therewith a spring 15 which tends to movethe sametoward the teeth on the guide rod 8. This spring-pressed pawl is so arranged that when the platen is in its uppermost position the pawl will engage the surface of the guide rod 8 just below the last tooth. Consequently, upon the first movement of the platen the guide rod will move into such a position that the pawl will operatively engage one of the teeth therein, thus connecting the same with the pawl.

efliectually preventing the movement of the platen until the latter has completed its movement in the direction in which it has started. I

To release the platen from the pawl in order that it may return after it has comabove the bracket 3 and into a position to be engaged by the plate or actuating member 6 asthe latter approaches the lower limit of its movement, the arrangement being such that the pawlwill become inoperative just 7 when the guide rod completes its movement or an instant before it completes its move ment. It isnecessary that the pawl should be retained in its inoperative position during the return movement of the guide rod and the platen. To this end the controlling member *has a part constituting a keeper to cooperate with, a latch or detent. In the present construction this keeper is in the form of a finger 18 projecting from the body of the controlling device and arranged to cooperate with a latch 01' detent :19 which is pi'votally mounted "at 20 on the bracket 3 and has connected thereto a spring 21 so arranged that it tends to move the detent toward the keeper or finger 18. During the downward movement of the platen, when the pawl 14 is in engagement with the teeth of the guide rod, the nose of the detent will engage the :end' of the keeper or finger 18,

thereby permitting the pawl to ride over the teeth Without interfering therewith.

"WVhen the pawl-controlling device is actuatedby the plate tithe finger or keeper 18 is moved downward to such anextent that the nose of thedetent will slip over the upper edge thereof, thus locking. the pawl-controlling device in a position to retain the pawl out of engagement 'with' the teeth of the guide =r0d. the guide rod approaches the npper limit of its movement the detent is stripped by means of a part connected to "and moving :in unison with the guide-rod.

In the -presentinstance the detent has a toe 22 projecting beyond its aXis' and into the path of a stud or projection' 23 carried by the platen, the toe 22 a'nd-studQiB being so arranged that they will be brought into engagement and the detent moved :out of engagenient with the finger 18 at or just "prior to the completion of the upward movement of the guide rod. 1 v V The operation of the device willibe rea dily understood from the foregoing description and it will be apparent :that :the device is not only very simple in its construction and operation but is of a strong, durable character and is so controlled that its operation 1s positive; and that it is not liable to become disarranged or to be rendered inoperative.

Further, it will be apparent that the construction is such as to enable the device to be readily manufactured and assembled.

As has been explained the present embodiment of the inventionis'for the purpose of illustration only and the guide rod of the actuating member for the platen is here used as illustrative of any reciprocatory member and such rec'iprocatory member will be the full equivalent of the guide rod when employed in combination with other elements going to make up the invention. 1, therefore, wish it to be understood that I do not desire to be limited to the details of construction shown and described, for obvious modifications will occur to a person skilled in the art. a s

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

1. The-combination, with a reciprocatory member havinga longitudinal seriesot teeth, and a pawl .mounted on :a fixed support and arranged to engage said .teeth to hold said reciprocatory member against movement in one direction, of a pawl-controlling device connected with said :pawl, a part connected wvith. said reciprocatory member .to actuate said pawl-controlling device as the 16011310- -cator-y member approaches the end of 1ts movement in one direction, a detent arranged to engage said pawl-controlling device when it has been actuated. and a part moving :in-synchironism with said reciproca- :tor-y .member to actuate said detent to release said pawl-controlling device as the reciprocatory member approaches the limit of itsmovement in the other direction.

2. The combi nation, with a reciprocatory member having a longitudinal seriesofteeth, and .a pawl mounted on a fixed support and arranged toengage said teeth to hold said reciprocatory member against'movement in one direction, of a pawl-controlling device operatively connected with said pawl and comprising a trip arm and a keeper, said reciprocat-ory member having a part to engage-said trip arm to move said pawl into aninoperaftive position when said reciproca'tory member moves in one :QlllGClllOIl, a

spring-actuated detent arranged to engage "said keeper when said tr1p arm has been actuated, and a partmoving in synchronism with said reciprocatorymember to actuate said detent to release said keeper when said reeiprocato-ry member moves in the opposite direction.

:3. The combination, with a reciprocatory member having a longitudinal series of teeth, and a pawl mounted on a fixed support and arranged to engage said teeth to hold said reciprocatory member against movement in one direction, of a pawl-controlling device operatively connected with said pawl and comprising a trip arm and a keeper, said reciprocatory member having a part to engage said trip arm and move said pawl out of engagement with said teeth as the reciprocatory member approaches the end of its movement in one direction, a spring-actuated detent pivotally mounted on a fixed support andhaving a nose held normally in engagement with the end of said keeper and arranged to operatively engage said keeper when movement has been imparted to said tripping arm, said detent having a toe projecting beyond its pivotal center, and a part moving in synchronism with said reciprocatory member to engage said toe as said member approaches the limit of its movement in the other direction.

4. The combination, with a bracket having a guideway and provided with a recess adjacent to said guideway, a reciprocatory member mounted in said guideway and having a longitudinal series of teeth arranged adjacent to said recess, and a spring-actuated pawl mounted in said recess to engage said teeth when said reciprocatory member has been moved from its normal position, a pawl-controlling device mounted on said bracket and connected with said pawl, said device comprising a trip arm and a keeper, said reciprocatory device having a part arranged to engage said trip arm to move said pawl out of engagement with saidteeth, a detent pivotally mounted on said bracket adjacent to said controlling device and having a nose ar ranged to operatively engage said keeper when movement has been imparted to said controlling device, and means controlled by the movement of said reciprocatory member in the other direction to move said detent out of engagement withsaid keeper.

5. The combination, with a bracket having a guideway and provided with a recess adjacent to said guideway, a reciprocatory member mounted in said guideway and having a longitudinal series of teeth arranged adjacent to said recess, and a spring-actuated 'pawl mounted in said recess to engage said teeth when said reciprocatory member has been moved from its normal position, of a pawl-controlling device mounted on one side of said bracket on an axis coincident with the axis of said pawl and rigidly connected with said pawl, said controlling device comprising a trip arm and a keeper, said reciprocatory member having a part to engage said trips arm and -actuate said controlling device as the reciprocatory member approaches the limit of its movement in one direction, a detent pivotally mounted near one end on the side the same to operatively engage said keeper 7 when said controlling device has been actuated, said detent having a toe pro ectlng beyond its pivotal center, and a part connected with said reciprocatory member and arranged to engage said toe and move said detent out of engagement with said keeper as said reciprocatory member approaches the limit of its movement in the other direction.

6. In a device of the character described, a bracket having two .parallel guideways and provided with a recess between said guideways, a device reciprocally mounted in one of said guideways, a guide rod reciprocally mounted in the other of said guideways, an actuating member arranged above said bracket and connected with said device and said guide rod, said guide rod having a longitudinal series of teeth adjacent to the recess in said bracket, and a spring-pressed pawl mounted in said recess and arranged to engage said teeth, of a pawl-controlling device mounted on said bracket and operatively connected with said pawl, said controlling device comprising an arm and a keeper, said arm extending above said bracket into the path of said actuating member, a spring-actuated detent pivotally mounted on said bracket and having a nose arranged to engage said keeper, said detent also having a toe, and a part carried by said device to engage said toe as said guide rod approaches the limit of its movement in the opposite direction.

In testimony whereof, I. afiix my signature in presence of two witnesses.

DON RAY ROWE. Witnesses:

EDWARD L. REED, F. W. SOHAEFER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. 6.

Images