US810411A - Door check and closer. - Google Patents

Description

, PATENTED JAN. 23, 1906- W. K. HENRY. DOOR CHECK AND CLOSER. APPLICATION FILED MAYG, 1905.

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UNITED STATES PATENT osmos- WILLIAM K. HENRY, OF NEW BRITAIN, CONNECTICUT. ASSIGNOR TO P. & F. CORBIN, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

DOOR CHECK AND CLOSER- Specification of Letters Patent.

Patented J an. 23, 1906.

Application filed May 6. 1905. Serial No- 269,081-

To all whom it may concern:

. Be it known that I, WILLIAM K. HENRY, a citizen of the United States, residing at New Britain, Hartford county, Connecticut, have invented certain new and useful Im provements in Door Checks and Closers, of which the following is a full, clear, and exact description.

My invention relates to improvements in door-checks, and the sarneis of particular advantage when employed in connection with a door-closer, for example, such as set forth in my application, Serial No. 259,082, filed May 6, 1905,

The main object of my invention is to provide an eflective liquid door-check which may be easily assembled and which is of such construction that it may be used without changing the internal mechanism upon either a right or a left hand door.

In the accompanying drawings, Figure 1 is a longitudinal section of the door-check and a part of the closer, the balance of the latter being shown in elevation. Fig. 2 is a crosssection of the check-casing with one of the pistons removed. In this view a cross-section of the closer mechanism is partly shown, while the balance is shown in elevation. Fig. 3 is a view of the lower part of the spindle with the crank thereon. Fig. 4 is a plan View of one of the connecting-rods; Fig. 5 is a plan View of another connecting-rod. Fig. 6 is a plan view of the packing-gland. Fig. 7 is a plan view of the packing. Fig. 8 is a plan View of the crank-supporting nut.

1 designates a cylinder constituting the liq- 2 3 designate pistons arranged therein.

4=designates the spindle having suitable bearings. The lower part of the spindle is I furnished with a crank portion furnishing the two opposite cranks 5 and 6, arranged one above the other so as to receive the connecting-rods 7 8, respectively. Both cranks 5 6 are made integral, and the construction is such that both connecting-rods may be applied thereto quickly and easily. This is accomplished by constructing the crank-pin of crank 5 of considerably greater diameter than the crank 6 and its crank-pin, so that the enlarged strap portion 7 a of the connecting-rod 7 may be easily passed over the-crank 6 and the adjacent support and then slipped into place on the pin of crank 5. The diameter of the strap 7 a is large enough to slip freely over any portion of the lower crank and crank-pin, and the assembling of the cranks and the strap ends of the connecting-rods is eifected before the spindle-bearings are attached to the case, at which time if the heads of the cylinder 1 are assembled the various parts may be turned freely so as to effect said connection.

9 designates a cotter-pin or other suitable I device which maybe secured to the crank 5 after the connecting-rod 7 is in place to prevent it from dropping down or tilting out of alinement.

10 1O designate the wrist-pins.

11 12 designate check-valves for the pistons 2 3, respectively.

Around the cylinder from end to end is a by-pass 13. 14 designates a communicating passage from the space between the pistons to said by-pass 13. (See Fig. 2.) 15 designates a valve whereby the size of this communicating passage 14: may be varied at will. The pistons 2 3 are shown in their normal inactive position. When the door is opened, the spindle 4 is turned, and the pistons 2 3 are moved away from each other and toward the opposite ends of the cylinder 1. During this movement the liquid freely passes the check-valves 11 12. When, however, the door starts to close, the liquid between the pistons .is prevented from flowing through the passages inthe pistons, since the check-valves 1 1 12 automatically close said passages. It is thennecessary for the iiquid to flow through the communicating passage 14: into the bypass 13 and thence to the cylinder ends. By this means the door may be opened freely, but is checked as it closes.

I need not describe the closing mechanlsm in detail, since that is set forth in my abovereferred-to application. Suflice it to say that 16 is a casing affording a spring-chamber within the same.

17 designates the spring, the same belng suitably connected to the spindle 4:. The spring-chamber is closed off from the liquidchamber by a partition 18, through which the spindle 4 passes. Between the walls of the partition 18 and the spindle are packing-washers 19 19, of suitable material, held in place by a gland 20, screw-threaded into a sleevelike extension on said partition 18. Underneath the packing-washers 19 may be a spring 21. The packing-washers 19 are caused to snugly fit against the side walls by the pressure of the spring 21 and the restraining influence of the gland 20, and thus prevent the leakage of oil.

22 designates a nut screw-threaded on the spindle 4 and arranged to draw it up into proper position preparatory to assembling the parts located above the check.

From the foregoing it will be seen that the cranks 5 6 being out of line will receive theconnecting-rods in such manner that they will not interfere in crossing the center, no matter which way the spindle 4- is turned. The connecting-rods may be made integrally, -it being unnecessary to open the ring 7* at the end of the upper rod 7 when the parts are assembled.- It is also possible to assemble these parts withoutdismembering the crank. With a construction other than that set forth herein it would be impossible to connect the upper ticular advantage when the check is origi-' nally assembled. The advantage of employing a relatively small opening for the admission .or removal of the liquid is that the danger of leakage is substantially reduced. Furthermore, it permits the caps 23 24 to be secured to the cylinder ends with a suitable cement or other packing material, which renders the same absolutely-liquid-tight, and it is, neces sary in introducing or{-removing the liquid from the cylinder to break thesejoints. The admission-port closed by the .plug 25 is so small relatively to the size of the cap that it is a very easy matter to effectively pack the, same and render it liquid-tight by the use of a small packingwasher.

What I claim is 1. In a door-check, acylinder, aspindle having two cranks at its lower end, said cranks being arranged oppositely and in difierent planes, thelowermost crank being free-ended, the diameter of the crank-pin nearest the spindle being substantially greater than the diameter of the other crank-pin and crank, pistons, connecting-rods between said pistons and said crank-pins, the strap end of .one'of said connecting rods being of suficient diameter to freely pass over one of said crank-pins and crank-arms to engage the othercrank-pin.

2. In combination, a cylinder, two pistons therein. a spindle having two cranks, said cranks being arranged oppositely and in different planes, connecting-rods having strap ends, said rods adapted to said cranks and arranged between said cranks and said pistons, the strap-bearings of the crank-pins of said cranks corresponding respectively to said straps, one Ofsaid connecting-rod straps be.- ing 'ofgreater diameter than the other to slip over one of said crank-pins and cranks and properly engage the othencrank, the closer mechanism including springchamber and spring and a liquid tight partition between said cylinder and said spring-chamber.

3. In a door-check, acylinder, two pistons,

a spindle having two cranks and crank-pin, oppositely arranged and in difierent-planes,

the diameter ofthe upper crank-pin being greater than the diameter. of the other pin and crank, and connecting-rods having strap ends between said rank-pins and said pistons, the strap'en'd of one of said rods being sufficiently-large to slip over one of said cranks and crank-pin and'fit the other pin.

- WILLIAM K. HENRY. Witnesses: I

R. C. MITCHELL, RoBT. S. ALLYN.

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