US685708A

US685708A - Door-check.

Info

Publication number: US685708A
Application number: US60653396A
Authority: US
Inventors: Eugene I Blount
Original assignee: Individual
Current assignee: Individual
Priority date: 1896-09-21
Filing date: 1896-09-21
Publication date: 1901-10-29
Anticipated expiration: 1918-10-29

Description

Patented Oct. 29, I90I. E. I. BLOUNT. DOOR CHECK.

(Application'led Sept. 21, 1898.)

' 4 sheets-sheet l.

(No Model.)

ITL-sl.

WTNESSaS:

Patented (1ct. 29, |901. l. BLDUNT.

D003 CHECK.

l (Application med sept. 21, 189e.)

No.l 685,708.

4 Sheets-Sheet 2.

@lo Model.)

llllmmllm TH: cams PETERS co. moTLn'Ho. WASHINGTON. 0,0.

No. 685,708. Patented Oct. 29, |9019 E. I. BLUNT.

D003 CHECK.

(Application lad Sept. 21, 1898.)

4 Sheets-Sheet 3.

(No Model-J No. 685,708. Patented oct. 29, |901. E. l. BLUUNT.

D008 CHECK.

(App'lieation mea sept. 21, 1896.) y (No Model.) 4 Sheets-Sheet 4.

j j@ a Y WTNSEE: u \\\& l' IE5-VDR:

M 2f/WMW-- a;

NITED -vSTATES EUGENE I. BLOUNT, ornvnanrr, MASSACHUSETTS, ASSIGNOR or on PATENT f Ferca".

TO THEOPHILUS KING, OF BOSTON, MASSACHUSETTS.

DOOR-CHECK.

SPECIFICATION forming 103.14'. 0f LeteTS Patient N0. 685,708,1dated October 29, i901..

Application filed September 21, 1896. Serial No. 606,533. (No model.) 'I i To tZZ whom, t may concern.-

4 Be it known that L'EUGENE I. BLoUNT, of Everett, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Door-Checks, of

which the following is a specilication.

This invention has for vits object the production of a novel door-check; and it consists in the novel features of construction and relalo tive arrangement of parts hereinafter fully described in the specification, clearly illustrated in the drawings, and particularly pointed out in the claims. l

Reference is to be had to the accompanying four sheets of drawings, forming a part of this application, in Which like characters indicate like parts wherever they occur.

Figure 1 representsafront elevation of my check mounted in position on the door. Fig. zo 2 represents a top plan View of the same. Fig. 3 is a vertical sectional view on the line 3 3 of Fig. 2.' Fig. 4 is a cross-sectional view on the line 4 4 of Fig. 3, taken so as to show the manner of connecting the ends of the spring z 5 and the'V parts to which they are attached.

Fig. 5 is a view similar to Fig. 4, showing the spring reversed. Fig. 6 represents a crosssectional view on theline 6 6 of Fig. 3. Fig. 7 is a detail view of a'portion of the mechanism illustrated in Fig. 6, showing the dog re versed. Fig. 8 is a cross-sectional view ou the line 8 8 of Fig. 3, taken to show the weights in plan view. Fig. 9 is a bottom plan view of the part shown in Fig. 3 with the lower cap removed. Fig.`l0 represents in front elevation the operativev parts of the check,spring, and casing shown in section. Fig. 1l represents a View showin(r the weights and their rings, the rings and portion of the casing and 4o cap being shown in section. Fig. l2 represents a top plan View of the pinion and ring, the arms of the Weights being shown in section. Fig. 13 represents a perspective View ofthe pinion kand the parts carried thereby. Fig. 14 represents a perspective view showing the Weights mountedin position in the arms carried by the pinion.

tive view of the main arbor or shaft with the collar supporting the dog. Fig. 16 represents 5o a detail viewof means forpreventing the nonweigh ts.

Athrough a sleeve i, arranged in cap e.

Fig. 15 is a perspecy 'surrounding `the sleevev t'.

operative movements of the weights. Fig.

17 is a detailed view of the brake-shoe. Figs.

18 and 19 represent views similar to Fig. 6, showing a different form of dog and clutch mechanism. Fig. 20 represents a cross-sec- 55 tional view on line 2O 2O of Fig. lO, showing in plan View a different form of friction and Fig. 2l represents a front elevation thereof, the casing being shown in section. Fig. 22 is a cross-sectional view on line 6o 22 22 of Fig. 20, showing the spring connections for the friction. Fig. 23` is a vi'e'wsimilar to Fig. 20, showing another form of Weight and friction device. Fig. 2l represents avertcal sectional view thereof on line 24E 424: of 65 Fig. 23, showing the construction 0f the pinion and the manner of connecting theweights therewith. Fig. 25 is a cross-sectional' \fie\v on line 25 25 of Fig.'23, showing the construction of the weights and frictions andthe man- 7o ner of connecting the Weights together.

f Referring to the drawings, inthe embodiment rof my invention therein shown and'selected by me for the purpose ofillustrating my invention ct represents a casing comprising a spring barrel-chamber b, vclosed by a cap @,Vpressed on said casing, and a cylindrical box or vchamber c, having an extension d5, both designed to contain gearing and the parts operated thereby. Thevopen end of the 8o chamber c is closed bya cap f, screw-threaded thereon, as shown, the several partsv of the casing as described being further clearly shown in Figs. 3 and 10. The casiuglis secured to the door by means ofscrews if, passing through brackets u, extending out therefrom` g represents a shaft or arbor arrangedin said casing,its lower end arranged in an `opening f, formed in an extension f2 of the 9o capf. The upper end of the shaft passes This sleeve is formed at its upper end with a AratChetWheelj, the latter having an annular groove k, constructed to receive a complef mentalange Z on the top of the plate e and The portion of the shaft g that projects beyond the sleeve t' is reduced, as shown in Figs. 3,10, and 15, to enter an elongated slot in loo `the sleeve 'L'.

a web g2, extending from the casing.

the end of the lever m. The free end of this lever is connected to a stationary bracket 'n on the door-frame by a link consisting of a threaded rod fn', fitted in said bracket and having its opposite end threaded into a turnbuckle m. This buckle is split at its upper end to hold between its split portion a spherical head m2 of a pin projecting from the free end of the lever m. The split portions m3 of the turnbuckle are clamped together by a screw m4. The turnbuekle may be removed from the pin m2 and may be adjusted along the rod lnin eitherdirection by loosening the screw/m4, after which it may be again clamped to the pin m2 by tightening said screw.

In the chamber b of the casing I place a spiral spring U of any desired degree of strength. The outer end tu of this spring is bent, as shown in Figs. 4t and 5, to engage a portion of the edge of'the casing, which is apertured for this purpose, the inner end of the spring being bent and inserted in a slot't'l of A dog w is pivoted upon the under side of the lever m, as shown in dotted lines in Fig. 2, and arranged to engage the teeth of the ratchet-wheel j. The parts are so constructed and arranged that the dog engages the teeth of the ratchet-wheel when the door is being opened, causing the rotation of the sleeve rand the winding up of the spring v The power stored up by the spring by the opening of the door acts upon the sleeve and the parts operated thereby to close the door. If the spring were left to its independent action, it would cause the door to close with a slam. To prevent this and to cause the door to close as slowly and noiselessly as desired, I employ self-regulating controlling or checking devices, which I will now proceed to describe.

On the shaft gis rigidly secured a collar y, having a socket y to receive the circular end z' of a dog z, the outer end of which may be serrated, as in Figs. (i and 7, at z2 to engage the internal teeth d of the wheel d, that is loosely mounted upon the shaft g and formed with external teeth d2. The wheel d is supported by an interrupted ring so', secured to the internal walls of the easing and extending partially around the same. The shaft g is supported by a collar g", preferably integral with (See Fig. 15.) The dog .z is normally held in engagement with the internal teeth d by means of a spring z3 and is so arranged that when the shaft is rotated in one direction the dog will slide relatively with the wheel d; but when the pressure or power stored up in the spring fu causes the shaft to rotate in the op# posite direction the dog z, in the form shown in Figs. 6 and 7, will engage the rack-teeth d of the ratchet-wheel and rotate it.

The external teeth d2 of the wheel d mesh.

with the pinion d3, fast on the shaft d4, journaled in the extension d5. A gear d, also fast on the shaft d4 and arranged under the wheel d, meshes with the teeth (Z7 ot' the pinsesgos ion-sleeve d8, loosely mounted on the shaft g' and arranged to slide thereon. (See Figs. 3, 10, 11, 13, and 14;.)

The pinion-sleeve d8 is formed at its lower end with radial arms d, carrying at their outer ends a ring (Zw, which is approximately equal in diameter to the interior of the lower chamber c of the casing. In the ends of the arms C19 are formed apertures d to receive arms (E12, connected to and carrying governorweights du. (See Figs. 3, 8, 9, 10, 11, 12, 13, 14, and 17.) Three of these Weights are shown; but the number can be varied as desired. Each Weight in the forni shown in the figures referred to is sector-shaped in horizontal section, and the three weights employed form a circle in plan View, as illustrated in Fig. 8. The pinion-sleeve rests upon and is supported by an annular ring f4, forming a continuation of the walls of the openingf in the extension f2. (See Figs. 3 to 21.) This pinionsleeve at its lower end may be formed as shown in Fig. 11, or itmay be cored out, as shown in Fig. 24, this cored-out or recessed portion d being arranged to surround the ring f4, the top of the ring engaging the step (Z22, of leatheroid or other suitable material.

The arm C112 of each weight is pivoted bya pin (115 in the apertures du. Each arm d carries a finger dm, adapted to engage a friction-ring o, arranged in the bottom of the chamber c of the casing, when the weights are thrown out, as hereinafter described. The ends of the fingers d1 extend into the space between the friction-ring r and the ring d10. (See Fig. 11.)

1" is a friction-ring arranged above the ring d10 and separated therefrom by a washer r2. The ring r is prevented from moving away from the ring (ZIO by a lip c on the interior wall of the casing. (See Figs. 3 and 1] The pivots d of the arms C112 are so positioned that the latter and their Weights d, when the mechanism is stationary, tilt forward against the pinionsleeve d8, as illustrated in Fig. 11. When, however, the shaft is operated by the spring and the pinion (Z3 and pinion-sleeve d8 are being rotated, the weights d will be thrown out by centrifugal force, and the lower face of the finger f7.1 and the upper surface of the ring d10 will separate, so as to bring said parts respectively in engagement with the friction-ring r and the washer r2, which will control the movement of the pinion-sleeve d8, checking the rapidity of its rotation and causing it and the parts connected therewith to move slowly at any predetermined speed, depending upon the position and power of the governor-weights d selected.

r3 is a washer arranged between the cap portionfof the easing and the friction-ring r. The washers r2 r3 may be formed of rubber, leather, or any composition that is desirable, and if it is found to be necessary the ring 7- may be connected to the ring (Zw, so as to turn therewith, provisions being made, however, to move one ring relatively to the other. The pin- IOO IIS

ion-sleevedisslightlyelongated,so thatitmay have a limited sliding movement, heretofore referred to, relatively to its driving-gear d6.

The mechanism is so constructed that it may be employed with the door opening in either direction. In Figs. 4. and 6 I have shown the spring c and the dog z as being arranged for the checking of the door, which is opened in one direction, and in Figs. 5 and 7 I have shown these parts as being reversed for operating a door opening in the opposite direction. The dog w, which coperates with the ratchet j, is double-headed, so that it too may operate in either direction. In practice the dogs and s, as well as" the spring e, should be each stamped with the symbols R and L, indicating right and left, respectively, or some other character of similar import, so that when the mechanism is vput together, if it is desired to operate the door opening to the right, then these parts `should be placed in a case with their sides bearing the inscription R facing up,'or vice versa.

For the purpose of keeping the mechanism well oiled, in the cap f is formed an oil-well f3 below the shaft g, the latter being formed with an axial aperture g3, connected by radial apertures g4, leading to the surface of the shaft at various points, to conduct the oil led up through the shaft' by the wick g5 to the 'points that it is desirable should be kept oiled. By means ofthese oil-ducts the mov# able parts are kept well oiled, so as to move noiselessly and with minimum resistance.

d1s represents a coiled spring arranged in an aperture C119 of the arms d and bearing against the side of the arm d.

d20 represents a screw arranged in the aperture d1, adapted to press against the spring dlg, regulating the force with which said spring shall bear against the arms el. The pressure of the spring upon the arms of the weights is such as to allowthe Weights to move to operate the friction, but is sufficient to hold said weights against inoperative movements or vibrations that might cause rattling. The spring d should be placed as near as possible to the pivot-pin CX15, so as to interfere but slightly with the proper movements of the weights.

The operation of the parts just described is as follows Assuming the door to be closed, as shown in full lines in Fig. 2, the opening of the same will be accompanied by the following movements: The leverm, turnbuckle m, and rod n', through the medium of the dog and ratchet-wheelj, will cause a rotation of the sleeve t' and a consequent widening up of the spring c. The, shaft g is rotated with the sleeve; but the dog a, carried thereby, rides easily over the internal teeth d of the wheel cl until the door is opened to the desired extent. As soon as the door is released it is free to swing to its closed position, the spring by virtue of the power stored up in the opening of the door begins to unwind and in doing so 'reverses the operations above described, rotating the shaft g and causing the door to move to a'closed position. tion of the shaft g by the spring causes the dog z to firmly engage the internal teeth of the ratchet-wheel d, which, through the medium of the connecting gearing, rapidly rotates the pinion-sleeve d8 and its ring d10.

thrown outward by centrifugal action, forcing the frictional members into engagement with each other, which checks the movement 8o .of the door and causes it to close slowly with out jarring or slamming. If the door tendsv to swing too rapidly, the action of the weights is to increase the friction and check the door.

In all cases the actionof the weights causes,

sufficient friction to control the door and prevent its moving except at a predetermined speed. The more rapidly the door tends to swing to its closed position the greater will be the force with which the governor-Weights 9o are thrown outward and the greater will be the friction produced to check the door. It follows, therefore, that by my invention the amount of resistance to be offered to the action of the door is automatically regulated,

requiring no adjustment for different sizes or weights of the doors.

In Figs. 1S to 25 are illustrated another means for connecting the dog z to the wheelJ CZ, and also another form of governor-weights 16o and friction devices.

Referring to Figs. 1S and 19, it will beseen l that the internal teeth of the wheel d are dis# pensed with, and in place of said teeth and the serrations on the dog z I employ a divided door, the collar y engages the dog on the side r x5 opposite to the depression e, causing the 'un beveled side of the dog to engage the end sV of the ring. This movement causes the dog to assume a radial position, resulting in the turning of the ring in its seat without caus- 12o ing sufficient friction between the ring and the flange z5 to clutch said parts together. When, however, the shaft g is rotated by means of the spring, the collar y carries one side of the pawl a' into engagement With' the 125 end al of the ring, the further movement of the collar y causing the pawl z to turn in its bearings to the position shown in Fig. 19, the

depression Z9 permitting this movement. In this position of the pawl a the further move- K 13o l yment of the collar'y causes the pawl to act as a lever to spread the ring to clamp the ring and wheel d together, thus causing said wheel to move with the shaft g, as in Fig. 6.

The rota- 7c This 75 movement of the ring and pinion-sleeve causes the governor or controlling weights d to be One end of the dog is beveled, r 1o Referring to Figs. 20, 21, and 22, the sleevepinion (Z3 instead of the arms d is formed with two laterally-projecting flanges dm. 'Io each of these iianges is pivoted a governorweight d, adapted by the rotation of the shaft g to be t-hrown outward in the direction of the arrows. C143 represents brake-shoes, each pivoted to one of the flanges clio and carrying a friction-pad el, adapted to engage the wall of the casing. Springs d normally hold the shoes, with their pads, ont of engagement with the wall of the casing. Parts d, carried by the shoes, are arranged in a position to be engaged by the governor-weights du. If now the door be open and left to be closed by the action of the spring e, the governor-weights will cause the friction devices or shoes dfi, with their pads, to be thrown outward, the latter engaging the wall of the casing to check the action of the door when the latter moves beyond the predetermined speed. Springs d, engaging the governorweights at a pivotal point, serve to check any rattling movement of the weights, as in the case of the springs CX18 in Fig. 16.

In Figs. 23, 24, and 25 the governor-weights d50 are pivoted to a flange di on the sleevepinion d8, so that they will move in opposite directions on their pivotal points instead of being arranged as in Fig. 20, where they move in the same directiorn A spring dz serves to draw the governor-weights toward the pinion-sleeve d8 and the brake-shoe C53 out of engagement with the wall of the casing when the pinion is not rotating or when it is rotating at a predetermined speed. In the form shown in Figs. 23, 24, and 25 the rotation of the pinion-sleeve CZ@ causes the governorweights to move outward in the direction of the arrow. Vhen this rotation is beyond a pre'- determined speed, the governor-weights will be thrown out with sufficient force to cause their brake-slices to engage the wall of the casing or some other complemental friction part, checking the action of the spring and door, asintheothercases. Byhavingthegovernor-weights arranged as in Fig. 23 I am enabled to dispense with the parts for preventing rattling. Suppose the parts to be arranged as in Fig. 23 and the pinion-sleeve (Z8 turning in the direction opposite to the hands of a watch, as in Fig. 19. To close the door, the brake-shoes CFS will engage the walls of the casing, but in a different manner. The casing or complemental part engaging the brake-shoe at the right tends to force said brake-shoe inwardly, while the casingor complemental friction part engaging the brakeshoe at the left operates as a drag on said shoe and tends to force said shoe outward, thus aiding the action of the governor-weights. This arrangement here shown is especially advantageous. It provides for the arrangement of the shoes that act alike, whether the door opens to the right or to the left. The

construction is simple, permitting the parts to be made of rough castings, thus eliminating the cost of finishing', ttc. The position of the pivots above the weights d50 in Fig. 23 may be varied as desired. The nearer they are placed toward the pinion-sleeve ZS the greater will be the resistance produced by the drag between the friction-pad and the wall of the casing or the more Will the force of the governor-weights be augmented.

It will be observed that in all cases the governor-Weights automatically regulate the resistance offered to the driving action of the spring for the closing of the door and increasing said resistance in direct proportion as the speed of the door increases, thereby causing the door to close with an easy steadyT movement.

Various modifications of my invention may be made without departing from the spirit and scope thereof, which comprises an automatic mechanical door-check in which the parts are so arranged that they automatically regulate the resistance offered to oppose the closing movement of the door.

Having now explained the nature of my invvention and described a way of constructing and using the same, though without attempting to set forth all of the forms in which it may be made or all of the modes of its use, what I claim, and desire to secure by Letters Patent, is-

VSc

l. A door-check comprising a spring, a shaft operated thereby, a centrifugal regulating device, and a reversible connection between said shaft and said device.

2. A door-check comprising a shaft,a spring, arranged to rotate said shaft in one direction, governor weights mounted concentrically on saidshaft but loose relative thereto, and means for intermittently connecting the shaft with said weights, in combination with friction devices operated by said weights.

3. A door -check comprising a casing, a spring, a shaft adapted to be driven by said spring, mechanical friction devices, means for connecting said devices with the shaft when the door is being closed, and means for preventing the rattling of said devices.

4. A door-check comprisingashaft, aspring arranged to operate the latter, a resistance, centrifugal means for operating said resistance, and a reversible dog interposed between said means and said shaft.

5. A door-check comprising a shaft, a reversible spring arranged to operate the latter, a resistance, centrifugal devices arranged to operate said resistance, connections between said shaft and devices comprising a reversible intermittently-acting means.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 21st day of August, A. D. 1896.

EUGENE I. BLOUNT.

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